nov mud motor handbook

284
MOTOR HANDBOOK Edition 7 Motor Handbook

Upload: mark-hubbard

Post on 28-Nov-2014

5.050 views

Category:

Technology


474 download

DESCRIPTION

2013 NOV Mud Motor Handbook and technical reference for all applications. Includes all specifications and performance data for drilling / directional drilling operations.

TRANSCRIPT

Page 1: Nov mud motor handbook

MOTOR HANDBOOKEdition 7

Moto

r Ha

nd

book

Page 2: Nov mud motor handbook
Page 3: Nov mud motor handbook

Motor Handbook

Seventh Edition, May 2011Version 7.4

Page 4: Nov mud motor handbook

This handbook is intended to be an aid to the operator and is solely provided for information and illustration purposes.

Please feel free to contact any of our locations with questions not answered in this handbook.

The technical data and text in this handbook is subject to change without notice.

Seventh Edition (May 2011) [Version 7.4]

Handbook Designer & Copy Editor:

Tyler Dyck

Editor:

Ryan Gee

Graphic Designers:

Trevor AlnerTyler Dyck

Technical Contributors:

Steve Barton Tony Pink Tyler Dyck Mike Poirier Kim Gates Huzaifah Razali Ryan Gee Lorna Snoek Blair Guidroz Peter Shwets Daniel Perez Mark Voghell

LicensedManufacturerUnder:API Spec. 7 - License Number 7-1-0063

www.nov.com

ISO 9001: 2000

09696:80119709696:802078

[email protected]

Page 5: Nov mud motor handbook

Introduction

iii

CONTENTSSECTION I: NOV Motors .............................................11. Introduction ....................................................................... 32. Motor Sub-Assemblies ...................................................... 4 Top Sub Options ................................................................. 5 Top Sub .................................................................................... 5 Dump Sub ................................................................................ 5 Motor Catch & Rotor Catch Top Subs ....................................... 5 Power Section .................................................................... 5 Adjustable Assembly & Fixed Housings ............................... 7 Adjustable Assembly ................................................................ 7 Fixed Housing .......................................................................... 7 Driveshaft Assembly ........................................................... 7 Bearing Assembly ............................................................... 7 Oil Sealed Bearing Assembly .................................................... 7 Mud Lubricated Bearing Assembly ............................................ 8 Drill Bits .............................................................................. 8 Other Options ...................................................................... 9 Stabilizers ................................................................................ 9 BlackBox® Top Sub and Bearing Mandrel .................................. 9

3. Motor Technology ............................................................... 10 ‘ST3’ Sealed Bearing Technology ....................................... 10 ‘ST2’ Sealed Bearing Technology ....................................... 10 ‘ST1’ Sealed Bearing Technology ....................................... 10 ‘ML3’ Mud Lubricated Technology ..................................... 11 ‘SR3’ Short Radius Technology ......................................... 11 DuraPower™ .................................................................... 12 HEMIDRIL® Drilling Motor ................................................. 12 PowerPLUS™ Drilling Motor .............................................. 13 Vector™ Drilling Motor ...................................................... 13 CT HEMIDRIL® Motor ........................................................ 14 CT PowerPLUS™ Motor .................................................... 14 Coiled Tubing Motor .......................................................... 15 Power Section Elastomers ................................................. 15 Other NOV Technologies .................................................... 16 BlackBox®Data Recorder ........................................................ 16 VibraSCOPE™ Dynamic Analysis ............................................ 16

SECTION II: MOTOR OPERATING DATA .....................174. Applications ....................................................................... 19 Performance Drilling ......................................................... 20 Directional Drilling ............................................................. 21 Air or 2-Phase Drilling ....................................................... 21 Selection / Setup .................................................................... 21 Pressures ................................................................................. 2 Temperature ............................................................................. 2 Volume Requirements ............................................................ 23 Fluid / Lubricant Requirements ............................................... 23 Drilling with Nitrogen (N2) ....................................................... 23 Operation ............................................................................... 23 Performance Curves .............................................................. 24 Milling .............................................................................. 24 Coring .............................................................................. 24 Rat holes, Mouseholes and Spudding ................................ 24 Workover .......................................................................... 24

Page 6: Nov mud motor handbook

Motor Handbook, 7th Edition

iv

5. Operation .......................................................................... 25 Run Preparation & Rig Site Testing ..................................... 25 Running In ......................................................................... 25 Starting the Motor .............................................................. 26 Drilling ............................................................................... 26 Reactive Torque ................................................................. 27 Stalling .............................................................................. 28 Over-Running the Bit .......................................................... 28 Vibration ............................................................................ 28 Torsional Vibration (Stick Slip) ................................................. 29 Lateral Vibration (Bit/BHA Whirl) .............................................. 30 Axial Vibration (Bit Bounce) ..................................................... 31 Rotary RPM ....................................................................... 32 Motor Pressure Drop .......................................................... 32 Bit Pressure Drop ............................................................... 33 Power Section Fits ............................................................. 33 Drilling Fluids ..................................................................... 34 Oil Based Drilling Fluids ........................................................... 35 OBM Run Practices ................................................................. 36 H2S (Sour) Service .................................................................. 36 The Effects of Chlorides on Power Sections ............................. 37 Drilling Fluid Additions ............................................................. 38 Downhole Temperature ...................................................... 39 Plugging Off ....................................................................... 40 Hydraulic Extension ........................................................... 40 Back Reaming ................................................................... 40 Partial Rotor Bypass .......................................................... 41 Running Additional Tools Below the Motor .......................... 41 Rotor Nozzling ................................................................... 42 Tripping Out & Checking the Motor ..................................... 42 Rig Site Maintenance ......................................................... 42 Motor Storage .................................................................... 43 Servicing ........................................................................... 44

SECTION III: SUPPORTING INFORMATION ................... 456. Nozzle Selection ............................................................... 477. Adjustable Assembly Operating Instructions .................... 49 2°, 3° and 4° Adjustable Housings ...................................... 49 2.38° Adjustable Housing ................................................... 50 Lock Housing Make-up Torques ......................................... 51 Legacy Black Max™ Adjustable Housing Setting Procedure 528. Troubleshooting ................................................................ 54

SECTION IV: MOTOR PERFORMANCE DATA ................. 559. Motor Performance Summary .......................................... 57 Motor Performance Summary ............................................ 58 Weight on Bit Limits – Imperial ........................................... 62 Weight on Bit Limits – Metric ............................................. 63 Motor Comparison Tables – Imperial .................................. 64 Motor Comparison Tables – Metric ..................................... 6510. Motor Performance Data .................................................. 66 How to Use Spec Pages ..................................................... 67

Page 7: Nov mud motor handbook

Introduction

v

APPENDIX: REFERENCE INFORMATION ..................... 23911. Engineering Data ............................................................ 241 Formulas ......................................................................... 241 Imperial Conversions ....................................................... 242 Metric Conversions .......................................................... 243 Millimeter Equivalents ...................................................... 244 Millimeter and Decimal Equivalents................................... 24512. Drill Bit Sizes .................................................................. 24613. Heavy Walled Drillpipe ................................................... 24714. Buoyancy Factor for Drill Collars .................................... 24815. Drill Collar Weight .......................................................... 24916. Drill Collar Make-up Torque ............................................ 25017. Drillpipe & Tool Joint Properties ..................................... 25818. Mechanical Properties of Drillpipe ................................. 26419. Hole Curvature ................................................................ 268Alphabetical Subject Index ................................................... 269

Page 8: Nov mud motor handbook

Motor Handbook, 7th Edition

vi

List of FiguresFigure 1: Motor Components .................................................................... 4Figure 2: Rotor & Stator Cross Section ..................................................... 5Figure 3: Lobe Profiles.............................................................................. 6Figure 4: Bearing Mandrel with BlackBox Pocket ....................................... 9Figure 5: Downhole Vibration Modes....................................................... 28Figure 6: Power Section Fit ..................................................................... 34Figure 7: Max Pressure De-rating for Power Sections .............................. 39Figure 8: Nozzle sizes and equivalent flow rates for water ........................ 47Figure 9: 2.38° Adjusting Ring ................................................................ 50Figure 10: Performance Curve Example .................................................. 69

List of TablesTable 1: Make-up Torque for Stabilizers, Thread Protectors & Offset Pads .. 9Table 2: Available HEMIDRIL® Sizes ...................................................... 12Table 3: Torsional Deflection Angle Values for Drillpipe ............................ 27Table 4: Basic Chemical Compatibility Chart ........................................... 36Table 5: Chloride Content ........................................................................ 38Table 6: Available Nozzle Sizes ............................................................... 42Table 7: Max Allowable Endplay to Re-run .............................................. 42Table 8: Make-up Torque, Top Sub, or Dump Sub to Stator ...................... 43Table 9: Nozzle Torque Values ................................................................. 48Table 10: 2°, 3° and 4° Conventional Lock Housing Make-up Torque ....... 51Table 11: 2.38° and 3° HEMIDRIL-rated Lock Housing Make-up Torque ... 51Table 12: Adjustable Housing Bend Settings............................................ 51Table 13: Black Max™ Adjustable Make-up Torque ................................. 53

Page 9: Nov mud motor handbook

SECTION I:

NOV MOTORS

Page 10: Nov mud motor handbook

NOV Downhole is the largest independent downhole tool and equipment provider in the world. We have the expertise to optimize BHA selection and performance, supporting over 150 locations in more than 80 countries.Our complete range of solutions for the bottom hole assembly and related equipment includes:

• Drill Bits • Drilling Motors • Borehole Enlargement • Drilling Tools and Products • Coring Services • Fishing Tools • Intervention and Completion Tools • Service Equipment • Advanced Drilling Solutions

We take pride in delivering superior performance and reliability. Our objective is to exceed our customers’ expectations, improve their economics, and be an integral part of their strategies.

NOV Downhole is an ISO 9001 Registered Firm, and is licensed to monogram API Products under Spec 7 License No. 7-1-0063.

Page 11: Nov mud motor handbook

3

1. IntroductionThe increased reliability of drilling motors, in combination with improved drill bit designs and Measurement While Drilling (MWD) systems, presents operators with enhancements to rotary drilling in an increasing number of applications. It is generally acknowledged that an effective drilling motor, matched to the drill bit and formation, provides a better rate of penetration than rotary drilling alone. In addition to increasing rate of penetration, a drilling motor allows a reduction in drillstring rotary RPM which reduces wear and tear on the casing, the drillstring, and other rotating topside components. A properly configured bottom hole assembly (BHA) also allows for effective directional control of the wellbore.

The BHA is the lower portion of the drillstring, comprised of a drill bit, the drilling motor, and other specialized drilling or directional tools. The main sub assemblies of a drilling motor include the power section, adjustable or fixed housing, driveshaft, and the bearing assembly. • The power section offers a wide range of bit speeds and torque outputs. With recent improvements in elastomer technology and manufacturing techniques, the power section can be tailored to function in high bottom hole temperatures and invert mud systems.

•The adjustable or fixed housing and driveshaft are located between the power section and the bearing assembly, and are engineered to withstand the increased torque rating of power sections.

•As drilling programs become more complex and drilling distances push further, NOV Downhole engineers its bearing assemblies to withstand higher loads and torque, while increasing its reliability and longevity. NOV Downhole offers both oil and mud lubricated bearing assemblies.

Your NOV Downhole representative will gladly assist you in selecting the most appropriate motor for your drilling application. Please consider the following questions when ordering your equipment:

What is the drilling APPLICATION?Milling, Coiled Tubing, Coring, Borehole Enlargement, Other

What is the general TYPE OF DRILLING?Straight, Directional, Performance (Vertical), Horizontal, Extended Reach Drilling

What is the FORMATION comprised of?Soft Rock, Hard Rock, Abrasive Formations, Thinly Laminated Formations

What is the estimated WELL DEPTH?Shallow Wells (up to 3,000ft), Intermediate (5,000 – 7,500ft), Deep (7,500 – 12,000ft), Ultra Deep (+16,000ft), Offshore Shelf, Offshore Deepwater

What is the anticipated downhole ENVIRONMENT?High Pressure, High Temperature, Corrosive, High Chlorides, Oil-based Mud

Are there any ADDITIONAL CONSIDERATIONS?Rate of Penetration (ROP) Requirements, Directional Controls, Stabilization Requirements, Dogleg Severity

Introduction

Page 12: Nov mud motor handbook

Motor Handbook, 7th Edition

4

2. Motor Sub-Assemblies

POWER SECTION

Options:•HEMIDRIL®

•PowerPLUS™•Vector™

ADJUSTABLE ASSEMBLY

Options:•2.38°, 3°, 4° adjustable•Fixed straight and bent housings

DRILL BIT

Options:•Roller cone•PDC•Bi-center•Diamond impregnated

DRIVESHAFT ASSEMBLY

Options:•Ultra Duty•Conventional

BEARING ASSEMBLY

Options:•Oil Sealed•Mud Lube•Short Radius•High Speed

Figure 1: Motor Components

Page 13: Nov mud motor handbook

5

Top Sub Options(Not shown in Figure)

Top Sub The top sub is simply a crossover housing at the top end of the motor. The top connection is an API tool joint box, and is available with an optional “float bore” to accommodate API float valves. The lower connection uses a proprietary thread that connects to the upper box of the stator housing.

Dump Sub(bypass valve, dump valve or bypass sub)

The dump sub allows fluid to bypass the motor and fill the bore of the drillstring when tripping into the hole. It also allows the drillstring to drain when tripping out of the hole. When no dump sub is used, a wet trip out of the hole will occur.

When the rig pumps are off, a spring holds a ported piston in the upper position, exposing ports in the dump sub body which allow drilling fluid to flow into or out of the drillstring while tripping. When the rig pumps are started, the flow through the piston bore causes a pressure drop across the ports in the piston. This forces the piston down, overcoming the spring force and closing the ports which in turn directs the drilling fluid through the motor. When the rig pumps are stopped, the spring forces the piston up, opening the ports.

NOV dump subs are preset to close at less than the minimum recommended circulation rate of the motor assembly. There is little pressure loss through the dump sub when operating.

Motor Catch & Rotor Catch Top SubsThe rotor catch system is designed to retrieve the motor in case of a housing fracture. It will retrieve the motor from the upper stator box connection down to the drill bit. The motor catch system has the additional feature of an integral catch flange within the top sub. It will retrieve the motor from the top sub down to the drill bit.

Power Section(motor section, motor assembly, multistage motor, positive displacement motor (PDM) drive, or rotor and stator)

NOV Monoflo® defines a power section nomenclature by its outer tube diameter, rotor/stator lobe configuration and number of stages. Tube sizes range from 1 11/16” to 11 ¼” tube OD. The rotor and stator are designed as helical elements with a major and minor diameter. The lobe is the curved spiral shape formed by the difference in the major and minor dimension.

Stator Elastomer

Stator Major(valley)

Stator Minor(peak)

Stator Tube

Rotor

Rotor Minor(valley)

Rotor Major(peak)

Motor Sub-Assemblies

Figure 2: Rotor & Stator Cross Section

Page 14: Nov mud motor handbook

Motor Handbook, 7th Edition

6

1:2 3:4 4:5 5:6 7:8 9:10

LOW TORQUE

HIGH SPEED

HIGH TORQUE

LOW SPEED

The stator will have one more lobe than the rotor. This difference in lobes creates a fluid inlet area (cavity) where fluid can be pumped through to create rotation. A stage is the distance measured parallel to the axis between two corresponding points of the same spiral lobe. This distance is commonly referred to as the lead of the stator.

The lobe configuration selection is dependent on the application need. As a general rule, a high rotational speed power section will produce lower torque; inversely a low speed power section generates higher torque. Below are common lobe configurations with a generic summation of performance:

The rotational speed generated by the power section is proportional to the rate of fluid flow through the power section, i.e. increasing the flow rate through a given power section directly increases the output speed. To increase the output speed of a power section without changing the flow rate, the cavity size is changed. A high speed power section will require a larger fluid inlet area (cavity) to allow more fluid throughput into the cavity.

The torque generated by the power section is proportional to the differential pressure applied across the power section and is independent of fluid flow. Generally, the more weight applied to the bit, the higher the torque needed to keep the bit turning, so the higher the differential pressure across the Power Section.

The maximum recommended differential pressure is limited by the stator elastomer. If pressure increases beyond the limits of the elastomer, the stator elastomer will deform, breaking the cavity seal so the mud flow leaks past the rotor and rotation stops – this is commonly known as a stalled motor. Refer to Stalling on page 28 for the recommended procedure to restart a stalled motor and limit potential motor damage.

An increase in torque output can be achieved by three methods:

•Use a power section with more stages. As torque is proportional to the applied differential pressure, a power section of similar tube diameter, lobe configuration and profile construction will generate more torque as the number of stages increases. For example, the 500-67-60 and 500 67-80 power sections will rotate at similar speeds but the 500-67-80 power section allows a higher maximum differential pressure, thus generating higher torque output due to more stages.

•Use a high performance elastomer. PowerPLUS™ allows 50% higher differential pressure across each stage, generating 50% more torque with the increase in differential pressure. For example, the 500-67-60 power section’s maximum recommended differential pressure is 860 psi (5,930 kPa) and generates 2,370 ft-lbs (3,220 Nm) of torque using standard elastomer. The same model in PowerPLUS™ has a maximum recommended differential pressure of 1,290 psi (8,895 kPa) and generates 3,560 ft-lbs (4,820 Nm) of torque.

Figure 3: Lobe Profiles

Page 15: Nov mud motor handbook

7

•Use a HEMIDRIL® even wall power section. HEMIDRIL Power Sections have a contoured stator tube ID and a thin elastomeric liner of even thickness. Backed by the contoured tube, the thinner elastomer liner maintains its sealing ability up to 75% higher differential pressure across each stage. HEMIDRIL® is the ultimate solution for increased torque output and reliability.

Adjustable Assembly & Fixed Housings Adjustable Assembly(bent coupling housing, adjustable housing, AKO)

The NOV adjustable assembly connects the stator to the sealed bearing assembly and encloses the driveshaft assembly. The angle setting is field adjustable to produce a wide range of build rates.

Operation of the 2.38°, 3° or 4° adjustable housings, is outlined in Section 7: Adjustable Assembly Operating Instructions on page 49.

The adjustable assembly is made up of only four components and is thus simple to service and maintain. The design allows for a large internal diameter and thus enables a larger, stronger driveshaft to be assembled.

Fixed HousingFixed, non-adjustable housings are available (special order) in straight or fixed bend configurations.

Driveshaft Assembly (transmission, flex coupling, universal joint, coupling assembly)

The driveshaft assembly converts the eccentric motion of the rotor into concentric rotation for the bearing assembly. It also accommodates any angle set on the adjustable bent housing (or fixed bend housing) and carries the thrust load from the rotor caused by the pressure drop across the power section. The assembly consists of a driveshaft and two sealed and lubricated universal joints connecting to the rotor and the sealed bearing assembly. NOV Downhole offers both conventional and “Ultra Duty” high torque driveshaft assemblies, designed to handle the highest torque power sections, with a proven record of reliability.

Bearing Assembly(output shaft assembly, bearing pack, bearing stack, bearing section)

Oil Sealed Bearing AssemblyThe sealed bearing assembly transmits the rotation of the driveshaft assembly to the drill bit. It transmits the compressive thrust load created by the weight of the collars and drill string to the rotating bit box, and supports the radial and bending loads developed while directional or steerable drilling. It also carries the tensile “off-bottom” thrust load produced by the pressure drops across the rotor and the drill bit, as well as any load caused during back reaming.

Motor Sub-Assemblies

Page 16: Nov mud motor handbook

Motor Handbook, 7th Edition

8

The NOV radial bearings and thrust bearings are sealed in an oil chamber balanced to the internal tool pressure. The thrust bearings are high capacity and there is no need to balance hydraulic thrust load to bit load with the NOV sealed bearing motor. The high capacity radial bearings readily withstand side loads caused by drilling with a deflection device or uneven cutting action along the drill bit periphery.

The lower connection is typically an API regular bit box. Custom connections and pin-down options can be special ordered.

Mud Lubricated Bearing AssemblyThe mud lubricated bearing assembly is interchangeable with the sealed bearing assembly and performs the same basic function. In a mud lubricated assembly, a small percentage of the drilling mud is allowed to pass through the bearing chamber, to lubricate the bearings. The tungsten carbide radial bearings and angular contact bearing section supports the radial loads along the full length of the bearing assembly, creating a very stiff, strong assembly.

Mud lubricated bearing assemblies can be used in the hottest holes with the lowest aniline point drilling fluids, as there are no elastomeric seals.

The lower connection is typically an API regular bit box. Custom connections and pin-down connections can be special ordered.

Drill BitsThe broad range of circulation rates, bit speeds and bit torques available with NOV motors make them suitable for use with journal bearing and roller cone bits, PDC bits, coring bits, bi-center bits, and diamond impregnated bits.

Significant work has been conducted by NOV® ReedHycalog® on developing specific Fixed Cutter (FC) designs for directional motor assemblies, with intent on providing high ROP when in rotating mode, along with a smooth torque response for efficient steering when in sliding mode. Several publications already exist on these developments, but in brief summary, the four prime FC design characteristics that have been engineered for steerable motors are:

•SmoothTorque™ Torque Control Components (TCC): Secondary components specifically positioned in the cone of the bit to prevent cutter over-engagement. These provide a reduction in torque fluctuations for superior toolface control.

•Optimized cutter backrakes: Relatively aggressive backrakes utilized to provide high penetration rates in rotating mode, while TCC’s are optimized (in terms of tip offset) to control torque when sliding.

•Lateral torque control: Gauge inserts for lateral control and to provide a low friction bearing surface

•SmoothTorque gauge design: Features laterally exposed gauge cutters to clean up the hole in rotating mode, and a tapered upper section to reduce gauge pad interference while in sliding mode

A number of these features will also be critical to success with motors in vertical applications. Although there is no requirement for the torque control features to assist in sliding, they will still deliver a smooth torque response, thus improving the overall efficiency of the design. They also allow the use of more aggressive cutting structures in challenging applications as TCC will dramatically reduce the risk of Stick-Slip. This has been proven in a number of field examples using the BlackBox® data recorder in near bit subs.

NOV can provide recommendations for matching ReedHycalog bits to motor configurations.

Page 17: Nov mud motor handbook

9

Tool Size

Torque(lb-ft) (N-m)

1 7/16” N/A N/A

1 11/16” N/A N/A

2 1/8” N/A N/A

2 3/8” N/A N/A

2 7/8” 2,000 2,700

3 1/8” N/A N/A

3 3/8” N/A N/A

3 1/2” 3,800 5,200

3 3/4” 4,200 5,700

4 3/4” / 5” 6,400 8,700

6 1/4” 10,000 13,600

6 1/2” / 6 3/4” / 7” 12,000 16,300

7 3/4” 20,000 27,100

8” 21,000 28,500

9 5/8” 35,000 47,500

11 1/4” 32,000 43,400

Other OptionsStabilizersNOV motors are available with a thread on the OD of the bearing assembly to accept straight or spiral blade screw-on stabilizers or screw-on offset pads. A protector is installed over this thread when stabilizers or offset pads are not being used.

Stabilizers, thread protectors, and offset pads should be torqued to the values shown below.

Figure 4: Bearing Mandrel with BlackBox Pocket

BlackBox® Top Sub and Bearing MandrelThe NOV BlackBox® can be used in several places in the BHA. Special sub and bearing mandrel options are available to house the Blackbox. See BlackBox Data Recorder on page 16.

Table 1: Make-up Torque for Stabilizers, Thread Protectors & Offset Pads

Motor Sub-Assemblies

Page 18: Nov mud motor handbook

Motor Handbook, 7th Edition

10

3. Motor Technology

‘ST3’ Sealed Bearing Technology(HEMIDRIL®-ST3, PowerPLUS™-ST3, Vector™-S3, DuraPower™-ST3)

NOV ‘ST3’ Sealed Bearing Technology (previously known as the Series 36 bearing assembly) uses the strongest and most versatile sealed bearing assemblies in the NOV fleet. This is a fully sealed bearing assembly – 100% of the drilling fluid passes directly to the bit with no loss via flow restrictors, so bit hydraulics are maximized.

Features: •Sealed, oil-lubricated bearing assembly •No-bypass design: 100% flow to bit •Ultra-Duty bearing mandrel for high torque power sections •Pin-down bearing mandrels available •Optional BlackBox™ pocket on bearing mandrel •Ball-type driveshaft assembly

Benefits: •100% of the fluid exits at the bearing mandrel bit box •Full flow to bit yields: - Better bit and hole cleaning - Increased ROP - Better bit life

•Ideal for rotary steerable applications: - Full flow to power rotary steerable - No signal loss when running MWD pulser below motor •Handles abrasive drilling fluids better – no flow restrictor wear •Best option for air drilling – not relying on mud to lubricate bearings

‘ST2’ Sealed Bearing Technology (HEMIDRIL®-ST2H, PowerPLUS™-ST2H, Vector™-ST2, DURAPOWER™-ST2)

NOV ‘ST2’ Sealed Bearing Technology (previously known as Series 24 / 24X bearing assemblies) and ‘ST2H’ (previously known as Series 24XH bearing assemblies) are capable of withstanding radial and axial loads similar to the ‘ST3’ assemblies. This design incorporates the use of flow restrictors to balance the lower rotary seals and therefore bypasses a small percentage of drilling fluid away from the bit. They have logged over 4 million hours of successful drilling since year 2000.

‘ST1’ Sealed Bearing Technology (Vector™-ST1, DuraPower™-ST1)

NOV ‘ST1’ Sealed Bearing Technology (previously known as Series 14 / 17 bearing assemblies) also incorporates the use of flow restrictors to balance the lower rotary seals and therefore bypasses a small percentage of drilling fluid away from the bit. This technology has also been used successfully for many years and smaller sizes are still regularly used.

Page 19: Nov mud motor handbook

11

‘ML3’ Mud Lubricated Technology (HEMIDRIL®-ML3, PowerPLUS™-ML3, Vector™-ML3, DuraPower™-ML3)

NOV ‘ML3’ Mud Lubricated Technology (previously known as the Series 40 bearing assembly) is designed with a mud lubricated bearing assembly featuring a bi-directional angular contact bearing pack that gives a uniform load distribution and high weight on bit capacity. In addition, the mud lubricated bearing assembly is radially supported over its entire length and can, therefore, tolerate very high side loads.

The additional feature that separates the ML3 mud lubricated motor from competitors’ tools is the “Twin Torque Nut” design. This patent-pending feature separates the power section output torque from the compression of the bearings, so the torque rating of the bearing assembly is not limited by the bearings.

Features: •Twin Torque Nut feature allows use with high torque power sections •Bi-Directional Angular Contact Bearing Pack - Tensile or compression load is supported by multiple rows of bearings •Bearing Assembly is radially supported over its entire length • Maximum operating temperature is limited only by power section •Ball-type driveshaft assembly

Benefits: •Higher operating torques •Higher bottom hole temperatures •Extended operating hours •Easy to service; Beneficial in remote locations •Versatile; Operates in virtually any drilling fluid •Higher weight-on-bit (WOB) capacity

‘SR3’ Short Radius Technology(HEMIDRIL®-SR3, PowerPLUS™-SR3, Vector™-SR3, DuraPower™-SR3)

NOV ‘SR3’ Short Radius Drilling Technology (previously known as the Series 39 bearing assembly) provides the ability to drill higher build rates, for short radius drilling. This uses a sealed bearing assembly – a shorter version of the ST3 design.

Another use of a short bit-to-bend motor is to reduce the stresses in the adjustable assembly by drilling a standard radius curve but using a lower bend setting than a standard motor. This reduces the bending stresses experienced by the adjustable assembly, decreasing the risk of a housing fracture.

Features:

•Short bit-to-bend length •Sealed, oil-lubricated bearing assembly •No-bypass design: 100% flow to bit •Ball-type driveshaft assembly

Benefits: •Higher build rates and motor steerability •Lower bend settings reduce stress on components •Minimizes True Vertical Depth (TVD) to reach horizontal

Motor Technology

Page 20: Nov mud motor handbook

Motor Handbook, 7th Edition

12

Size Lobes Stages Type2-7/8” 5/6 3.5 HEMIDRIL

5” 4/5 6.3 HEMIDRIL

5” 7/8 3.8 HEMIDRIL

6-1/4” 7/8 2.9 HEMIDRIL

6-1/4” 7/8 4.8 HEMIDRIL

6-7/8” 7/8 2.9 HEMIDRIL

6-7/8” 7/8 3.0 HEMIDRIL

6-7/8” 7/8 5.0 HEMIDRIL

8” 7/8 4.0 HEMIDRIL

9-5/8” 7/8 4.8 HEMIDRIL

11-1/4” 7/8 4.8 HEMIDRIL

DuraPower™ (DuraPower™-ST3/-ST2/-ST1 DuraPower™-ML3, DuraPower™-SR3)

Each of the motor technologies (-ST3, -ML3, SR3, etc.) are available for order without a power section. This configuration of a motor bottom end without a power section is named DuraPower.

HEMIDRIL® Drilling Motor (HEMIDRIL®-ST3, HEMIDRIL®-ML3, HEMIDRIL®-SR3, HEMIDRIL®-ST2H)

The HEMIDRIL® Drilling Motor offers the highest power and torque output by utilizing even wall technology. The power section consists of a steel supported core with flexible multi-body construction, an even thickness elastomer and Power Rib™ technology. These features combine to deliver increased torque, power, and efficiency that are required in challenging drilling environments.

The HEMIDRIL’s steel supported core allows for increased differential pressure across each stage over the length of the power section. The constant elastomer thickness reduces fluid leakage and heat buildup. The Power Rib technology further increases the seal efficiency which improves the conversion of pressure to torque and power.

Delivering an increased rate of penetration at a consistent RPM, the HEMIDRIL is ideally suited for challenging drilling environments including high temperatures and invert mud systems.

Features: •Even wall design •Flexible multi-body construction •Power Rib technology •Available with Sealed or Mud-Lubricated Bearing Assembly

Benefits: •Higher torque and power output – increased RPM •Consistent RPM and directional control – well suited for use with rotary steerable systems •Increases rate of penetration and drilling efficiency •Withstands aggressive drilling applications and conditions •Extends drilling distances

Table 2: Available HEMIDRIL® Sizes

Page 21: Nov mud motor handbook

13

PowerPLUS™ Drilling Motor (PowerPLUS™-ST3, PowerPLUS™-ML3, PowerPLUS™-SR3, PowerPLUS™-ST2H)

The PowerPLUS™ Drilling Motor features an advanced elastomer power section delivering increased torque output capacity, power, and efficiency. The increased mechanical properties of the power section elastomer provide the ability to drill through tough formations with high reliability.

Delivering increased rate of penetration at a consistent RPM, the PowerPLUS Drilling Motor is suited for all drilling applications where increased torque is desired, or when increased reliability over standard elastomer is needed.

Features: •Advanced elastomer stator •Available with any bearing assembly option

Benefits: •Capable of 50% higher torque and power output •Increases rate of penetration (ROP) and drilling efficiency

All sizes available: 3 1/2” to 11 1/4”

Vector™ Drilling Motor (Vector™-ST3, Vector™-ML3, Vector™-SR3, Vector™-ST2, Vector™-ST1)

The Vector Drilling Motor is considered a standard within the industry and is the motor of choice for conventional drilling applications. The motor is available in an array of power section configurations that deliver the desired speeds and torque. Furthermore, it is configured with an adjustable or fixed housing and an oil or mud lubricated bearing assembly.

The Vector Drilling Motor is readily available and cost effective. It is a reliable tool that has a minimum number of components and is simple and efficient to service.

Features: •Wide range of speeds and torques •Adjustable or fixed housing option •Available with Oil Sealed or Mud-Lubricated bearing assembly •Stabilization option

Benefits: •Reliable and consistent performance •Increases ROP and drilling efficiency •Adaptable to a variety of drilling environments •Cost effective – simple to maintain and service

Standard Sizes: 3 1/2” to 11 1/4”

Motor Technology

Page 22: Nov mud motor handbook

Motor Handbook, 7th Edition

14

CT HEMIDRIL® Motor (HEMIDRIL®-CT3)

The HEMIDRIL® Coiled Tubing motor has been developed to meet industry demand for aggressive, high torque, low speed requirements. This powerful motor features even wall technology which is the highest torque and power-output class of power sections available to the market. The HEMIDRIL power section has a steel supported core with flexible multibodyconstruction, even elastomer thickness, and Power Rib technology.

These features combine to deliver increased torque, power, and efficiency that are required in today’s aggressive environments.

Features: •HEMIDRIL power section provides up to 75% higher drilling torque than traditional power section •Power Rib technology further increases sealing efficiency and therefore improves the conversion of pressure to torque and power •Steel supported core allows for increased differential pressure across each stage over the length of the power section •Titanium flexshaft w/ straight housing

Benefits: •Experiences less swell, so rubber last longer… increased reliability •Constant elastomer thickness reduces fluid leakage and heat build up •Sealed bearing assembly – best choice for air/nitrogen

2 7/8” 5/6 3.5 Stage configuration available

CT PowerPLUS™ Motor (PowerPLUS™-CT3)

The PowerPLUS™ Coiled Tubing motor utilizes the high performance PowerPLUS elastomer that delivers 50% more power and torque over standard NBR elastomer power sections. PowerPLUS has proven to perform remarkably in both water based fluids and nitrogen making it an ideal power section for CT milling operations.

Features: •High performance PowerPLUS elastomer •50% more power & torque than conventional CT power section

Benefits: •Improved CT milling/drilling performance •Increased milling speed •Excellent performance in water based fluids and nitrogen •Less stress on coiled tubing •Reduced operational cost

Standard Sizes: 1 11/16” to 3 1/8”

Page 23: Nov mud motor handbook

15

Motor Technology

Coiled Tubing Motor (Vector™-CT1)

Designed specifically for coiled tubing and slim hole applications, the Coiled Tubing Motor provides all the benefits of the Performance Drilling Motor.

This motor is used with coil tubing units for continuous drilling and workover applications such as vertical deepening, milling, de-scaling or dewaxing of production tubing, windows, and cement plugs.

Features: •Small diameter applications •Wide range of speeds and torques •Smooth outer diameter – Slick

Benefits: •Coiled Tubing and Slim Hole applications •Consistent performance •Cost effective and simple to maintain

Standard Sizes: 1 11/16” to 3 1/8”

Power Section ElastomersStandard NBR (Monoflo® Reference code: RR)

•Commonly known as Nitrile, Buna Nitrile •Most widely used elastomer in oilfield applications because of general chemical compatibility and good mechanical properties

HNBR (Monoflo® Reference code: OC)

•Commonly known as Hydrogenated Nitrile, HSN •Hydrogenation process offers better resistance to oils and high temperatures

PowerPLUS™ (Monoflo® Reference code: PRR)

•High performance version of standard NBR •Rated for 50% higher differential pressure than standard NBR, providing 50% higher torque output capacity

See Power Section Fits on page 33 for more information.

Page 24: Nov mud motor handbook

Motor Handbook, 7th Edition

16

Other NOV TechnologiesBlackBox® Data RecorderBlackBox® analysis is a full downhole dynamics analysis service which combines multiple and flexible positions of measurement combined with high frequency data capture to provide a full picture of the downhole dynamic conditions. Through in-depth analysis and expert interpretation of both downhole and surface data, effective vibration mitigation and reduction techniques can be identified leading to increased drilling efficiency. BlackBox Data Recorders provide:

•Downhole Temperature •Maximum Lateral Accelerations •RMS Lateral Accelerations •Torsional Vibration Indicator (TVI) •Downhole RPM

Features: •No non-magnetic requirements •One-piece with self contained power supply •No interference with other electronic devices •Compact, flexible reliable design •High frequency data capture rate

Benefits: •Can be run below motors – Gives true bit dynamics capture •Can be run in its own sub or fitted in existing drillstring components (See BlackBox® Top Sub and Bearing Mandrel on page 9) •Can use multiple recorders at various places in the BHA •Enables complete system dynamics analysis

VibraSCOPE™ Dynamic AnalysisVibraSCOPE™ is a drillstring dynamics modeling software that enables prewell analysis of the BHA and drillstring. It utilizes finite element analysis tomodel the dynamics of the entire string from bit to the rig floor. It predicts parameters that initiate vibration and high impact loading that can lead to premature bit and/or downhole tool failures, identifying combinations of conditions and parameters that are most likely to results in vibration modes while drilling. The proprietary software delivers a recommended set of drilling parameters, based on a proven scientific approach that minimizes risk of vibration.

Page 25: Nov mud motor handbook

17

SECTION II:

MOTOR OPERATING DATA

Page 26: Nov mud motor handbook
Page 27: Nov mud motor handbook

19

4. ApplicationsThe following information aids in selection of the proper motor for an application. First, the intended application must be known, whether it is Vertical Drilling, Directional/Horizontal Drilling, Performance Drilling, Milling, Coiled Tubing, Coring, Borehole Enlargement, or other. •Hole Size Used to determine motor size. Sufficient space between the hole ID and motor OD must be left to allow fishing using common catch tools. NOV Downhole offers a full range of overshots for fishing applications. Note: Motor sizes are nominal sizes – there may be upsets on the OD that are larger or grooves that are smaller than the nominal motor size.

•Bit Type Used to determine power section configuration and motor setup. Aggressive bits typically require more torque output. Diamond impregnated and milling bits typically perform best at high speeds. Bicenter bits typically require no motor upsets or stabilizers until 30 ft / 10 m above the bit, for passing through casing.

•Desired Bit Speed Used to determine power section configuration. Bit speed is the sum of the Motor output speed and the top drive/rotary table rotary speed. The rotary speed must be subtracted from the desired bit speed to obtain the desired motor output speed. Alternatively, this choice is often based on a need for a configuration “faster than” or “slower than” a configuration that was previously used in that application.

•Desired Output Torque Used to determine power section configuration. The motor must generate sufficient torque to keep the bit turning under the highest anticipated WOB for the application. Generally roller cone bits require less output torque than PDC bits, but more WOB is applied to roller cone bits. Aggressive bits typically require more torque output. Alternatively, this choice is often based on a need for a configuration “stronger than” a configuration that was previously used in that application.

•Mud Type Used to determine the power section fit, stator elastomer, coating on the rotor, and possibly the type of bearing assembly used – sealed or mud lubricated. See Drilling Fluids section on page 34. Air drilling applications benefit from the use of a slower speed power section, typically with looser fits to extend the life of the elastomer.

•Expected Bottom Hole Temperature – Static Used to determine power section fit. The elastomeric liner of the stator swells as the temperature increases, which tightens the fit between the rotor and stator. As the fit tightens, the possibility of chunking increases. Conversely, a loose fit intended for higher temperatures will be prone to stalling if used in a cooler hole. Note: if the BHT varies by more than 40°F (20°C) over the course of the motor run planned, provide starting and finish temperatures.

•Mud Weight, Solids and Sand content Higher mud weights and abrasive solids/sand content are abrasive to motor components. In these applications, mud-lubricated bearing assemblies and tungsten carbide coated rotors may be preferable.

Operation

Page 28: Nov mud motor handbook

Motor Handbook, 7th Edition

20

•Mud Chlorides Level High levels of chlorides in mud system can significantly limit motor life, by causing corrosion of the rotor or weakening of the bond between the stator elastomer and stator tube. (See The Effects of Chlorides on Power Sections on page 37.) An alternative coating on the rotor, such as tungsten carbide, would be beneficial in these situations, to prevent corrosion.

•Flow Rate Range Used to determine power section configuration and possible need for bypass nozzle. Flow rates higher than the Max Flow Rate specification for the power section will cause accelerated deterioration of the stator elastomer liner, and may cause excessive washing of the internal motor components. A rotor bored for bypass flow may be required, to bypass the extra flow.

•Desired Build Rate Used to determine bend angle recommendation. Each power section has a chart of “Predicted Build Rates” with the latest available series of sealed bearing assembly in SECTION IV: MOTOR PERFORMANCE DATA.

•Stabilization Choose either of: True Slick, Slick with Thread Protector, Straight Blade stabilizer, Spiral Blade stabilizer, Integral Blade stabilizer, or Offset Pad stabilizer. Stabilizers will affect the Predicted Build Rate in a directional application, and will also reduce lateral vibrations and improve hole quality in many applications.

•Top Sub / Dump Sub options Various top connection options are available. Float bore is optional, with two or more float bore choices in some motor sizes.

•Catch Stem Optional accessory, included as a standard feature in most regions.

•Bit Box options Certain motor sizes have various bit box thread options, including pin threads (known as pin-down mandrels) which are typically used for running other tools below the motor, such as Rotary Steerable tools.

•Other Tools Run Below Motor Certain tools run below the motor benefit from the use of no-bypass motor bearing assemblies (e.g. ST3 and SR3 motors), to ensure all flow goes to the tool below the motor, without any loss of flow or pressure.

Performance DrillingNOV motors have been used successfully with higher output power sections for straight hole performance drilling. These power sections have more stages and consequently, provide more uniform torque output since the pressure per stage required to produce a given torque is less. The result is optimum rates of penetration. The slow speed PowerPLUS™ and HEMIDRIL® motors are most commonly used for these applications, as they allow higher WOB to be applied, to increase rates of penetration while maintaining reliability.

For vertical drilling through formations with high dip angles, which tend to push the motor away from vertical, NOV offers stabilized motor products to improve performance in vertical drilling applications. See Vector™ Drilling Motor under Section 3: Motor Technology on page 13 for more information.

Page 29: Nov mud motor handbook

21

Operation

Directional DrillingMost NOV motors are used with adjustable housings to provide a method of drilling directionally downhole. The desired angle is set in the adjustable housing sufficient to alter hole course with the drillstring not rotating and the tool face oriented. Charts showing Predicted Build Rates are shown for each configuration in SECTION IV: MOTOR PERFORMANCE DATA. When the drillstring is rotated with the motor operating, the system drills straight ahead. Refer to SECTION IV: MOTOR PERFORMANCE DATA for the “Maximum Adjustable Bend Setting For Rotary Drilling”. Note: NOV recommends a maximum bend setting of 1.83° for rotary drilling.

NOV adjustable housings are easily adjustable on the rig floor. (See Section 7 for Adjustable Assembly Operating Instructions.) Adjustable assemblies are available in the following bend settings depending on motor size:

•0° to 2° in 12 increments •0° to 2.38° in 8 increments •0° to 3° in 12 increments •0° to 4° in 18 increments

The NOV adjustable housing eliminates the need to select a bent housing angle before a motor can be assembled and shipped. NOV motors contain a screw-on stabilizer thread on the lower bearing assembly to enable the motor to be run slick with the NOV adjustable housing, or with field installable stabilization as required.

Review of NOV customer requests over the past few years showed that motors are used at bend settings of 2.38° or less in 96% of applications. This led to the development of NOV’s newest adjustable assembly, which has a maximum bend setting of 2.38° in 8 increments. The benefit is that a significantly larger diameter driveshaft can be used within this assembly, greatly increasing its torque capacity.

NOV Downhole concentrates on the ongoing development of improved motors and accessories to compliment the overall steerable system.

Air or 2-Phase DrillingThe NOV motors may often be used for drilling with air or two-phase drilling fluids as the circulating medium.

Two-phase drilling fluids can be defined as follows:

•Mist: occurs when the liquid fraction is less than 2.5% at downhole conditions. In this case the liquid stays as droplets within the gas. •Foam: occurs when the liquid fraction is between 2.5% and 25% at downhole conditions. Foams are typically specified as “% foam quality”. Foam quality is the volume fraction of the gas (i.e. 75% foam quality is 75% gas and 25% liquid, by volume).

•Aerated mud: occurs when the liquid fraction is greater than 25% at downhole conditions. In this case the gas stays as bubbles within the liquid.

Since there are large volumes of oxygen present in air drilling, corrosion of the drillstring can be a concern. Passivating (oxidizing) inhibitors should be used to minimize this corrosion.

Selection / SetupSealed Bearing motors are generally preferable to Mud Lubricated motors, as air does not conduct heat as well as liquid (mud), so the bearings in the Mud Lubricated motor are prone to lock-up due to over-heating. This may not be an issue in aerated muds.

Page 30: Nov mud motor handbook

Motor Handbook, 7th Edition

22

The critical issue with using a motor in an air or two-phase drilling application is minimizing the temperature generated within the stator elastomer liner. This can be accomplished as follows:

•Run stators with a looser power section fit than would be run in a similar hole temperature with drilling mud. •Use the lowest foam quality possible (i.e. the highest amount of liquid). •Minimize the RPM •Minimize times with no circulation

All of the above, in addition to the downhole temperature, interact to determine the life of the stator. Failure of the stator elastomer liner is accelerated by internal heat build-up. As the liner heats up, it expands, causing an increase in the interference fit that in turn causes more friction and further heat build-up. Hard spots then develop in the liner and eventually chunking occurs. The problem is further compounded by the poor thermal conductivity of air compared to a drilling mud.

There are rotors and stators available that are designed specifically for air or two-phase drilling. These accommodate high flow rates and run at lower pressure drops and should be selected if available. Please contact NOV Downhole for availability and application of these power sections.

When air drilling power sections are not available, use the slowest available power sections that have the same target flow rate. Ideally, use high performance power sections (more stages) because the differential pressure per stage required to produce a given torque is less. This lower differential pressure will be less damaging to the stator elastomer liner. Although the motor will produce the same torque at a given differential pressure when using air, the maximum obtainable differential pressure will be less due to the extra slippage that occurs with a gas. Consequently, the maximum obtainable torque (and stall torque) will be lower.

A top sub should be used above the power section rather than the dump sub because airflow will not cause the dump sub to close. Alternatively the dump sub ports can be blanked off. Use a stabilized motor to reduce vibrations if possible – air does not provide as much vibration dampening as drilling mud.

While drilling with air or two-phase fluid, the fluid density in the annulus may be higher than in the bore due to the cuttings in the annulus. When a connection is being made, the reduced pressure in the bore can result in cuttings entering the bore. This can damage the motor or plug the bit. A float valve should therefore be used when drilling with air or two-phase fluids to prevent this. A small hole is sometimes drilled in the flapper to allow pressure to equalize if the drillstring does become plugged between the float valve and the bit.

PressuresThe pressure at the outlet of the motor (i.e. the motor exit pressure) has a pronounced effect on the response of the motor. The motor exit pressure is the sum of the hydrostatic pressure and the bit pressure drop. This is the pressure that determines the volume flow rate through the motor.

As the motor exit pressure increases, the motor becomes less susceptible to runaway and acts more like a motor running on liquid only.

TemperatureThe 7/8 2.0 power section configurations are designed specifically for Air Drilling, as they have a longer lead length and looser fit. The standard fit in this configuration can be used in static bottom hole temperature up to 220°F (104°C).

Page 31: Nov mud motor handbook

23

Operation

Volume RequirementsIn a standard air drilling application, the required air flow rate (in SCFM) for proper motor operation is typically three to four times the maximum motor liquid flow rate (in GPM). This rule applies for motor exit pressures up to approximately 300 psi.

As the motor exit pressure increases, the airflow rate required to achieve the same motor operating speed (rpm) also increases. This is common in some under-balanced applications. In these cases, the required air flow rate increases. Consult NOV Downhole engineering in these cases.

If higher flow rates are desired, the rotor can be fitted with a nozzle to bypass a portion of the flow. However, the motor becomes even more sensitive to stall if the rotor bypass is used.

Fluid / Lubricant RequirementsA lubricant is required to lubricate the stator elastomer liner. Soap or gel thoroughly mixed with water and injected at an approximate rate of 5% by volume at downhole conditions is adequate for most applications. In formations that could swell and be damaged by water, vegetable based oil is used to lubricate the power section. This is referred to as ‘dusting’ a well. Typically, the flow rate for this case is very low – only 1 to 2 gallons of oil per hour – to avoid making the formation wet and prevent getting stuck. Other drilling conditions may dictate a higher flow rate (i.e. avoiding formation of mud rings).

Drilling with Nitrogen (N2)Air itself consists of approximately 78% nitrogen. The density of nitrogen is approximately 3% less than that of air at standard temperature and pressure. Functionally, the motors will run the same on nitrogen as air. However, the explosive decompression, as discussed below, is more severe with nitrogen.

Since nitrogen is an inert gas, the Nitrile sealing components within the motor, including the stator, are not affected chemically by nitrogen. However, any sealing compound will absorb nitrogen (as well as other gases) to some extent while under pressure. If the pressure has been applied long enough and the pressure is released too quickly, the gas does not have sufficient time to be expelled from the Nitrile and explosive decompression can occur, resulting in blistering. This is typically not a problem with continuous pressure drops across the motor of 400 psi (2,800 kPa) and less. After drilling for extended periods with nitrogen, stator damage can be expected.

For more detailed recommendations, consult an NOV Downhole representative.

OperationIn general, a motor driven by air, mist, or foam should be started while on bottom. It should not be allowed to run freely before tagging bottom because this can cause high shock loads as the bit tags bottom which may damage the motor. Ideally, the motor should be started with fluid first.

A motor is much more torque sensitive when using air, mists, or foams, than with liquids and consequently is more susceptible to stalling.

When drilling operations are to be stopped, let the motor drill off as the compressors and boosters are being shut down. Picking up “off bottom” prior to equalizing the pressure can permit the air compressed in the drillstring to expand, which would lead to excessive motor speeds and possibly damaging the motor. It can also cause the internal connections toback off.

Page 32: Nov mud motor handbook

Motor Handbook, 7th Edition

24

Performance CurvesThe performance of a mud motor when run in an air drilling application is not as consistent across temperature and pressure ranges as when run with drilling mud due to the compressibility of the air. NOV Downhole Engineering can provide an air drilling performance chart if the following information is provided:

•Downhole pressure •Downhole temperature •Anticipated power section differential pressure •Flow rate planned (scfm / m3/s) •Foam quality – percentage of air to liquid (approx) •Outdoor temperature at rig

MillingNOV low speed motors provide the high torque required for milling and cutting with tungsten carbide dressed mills and cutter blades. This is an alternative to rotating the drillstring, especially in deep deviated holes where milling can be slow and can cause extensive drillstring and casing wear. Applications include packer milling, drilling cement plugs, casing cutting and junk milling.

CoringNOV high torque, low speed motors are ideally suited to coring operations. The motor provides increased penetration rates at lower bit weights achieving better core recovery rates. Lower drillstring and casing wear is experienced, particularly in high angle holes. As a rule no more than 30 feet (9 m) of core barrel should be run at a time.

Rat holes, Mouseholes and SpuddingNOV motors have applications for drilling rat holes, mouseholes, and spudding. The motor is either made up to the kelly, or made up with two drill collars and a circulating head above it, to add weight and accomplish the tasks faster. The reactive torque of the motor is restrained with the rigtongs.

WorkoverNOV offers 1 11/16” to 4 3/4” diameter workover motors for cost-effective use in severe workover applications inside production tubing strings, for use with coiled tubing units.

Page 33: Nov mud motor handbook

25

Operation

5. Operation

Run Preparation & Rig Site TestingNOV motors are shipped from the service facility with all components inspected, all new seals and oil (in sealed bearing motors), and all tool connections made up to the proper torque. Motor dynamometer testing is also available at select service facilities. Motors are shipped with the rotor bore plugged unless otherwise specified. All motors are shipped with a protector covering the screw-on stabilizer thread unless a screw-on stabilizer is ordered. When ordered in advance, the screw-on stabilizer is installed at the service center before shipment.

If a dump sub is used with the motor, the following check is recommended before running into the hole:

•Set the motor in the slips and install a safety clamp. Remove the lift sub and make up the Kelly/top drive. Remove the safety clamp and slips and lower the motor until the dump sub is below the drilling nipple, but visible.

•Start the rig pumps slowly; fluid should flow out of the dump sub ports.

•Increase the pump rate slowly until the dump sub closes. Leave the pumps running and make note of the circulation rate and stand pipe pressure when the dump sub closes. With the pump running and the dump sub closed, check to ensure that there is no drill fluid leakage through the ports. It is advisable to increase the pump speed in two or three steps, to the maximum circulation rate expected downhole, and note the circulation rate and standpipe pressure in each case.

•Shut down the pump. The dump sub may not open due to a pressure lock in the short hydraulic test circuit. If this occurs, bleed off the pressure to permit the dump sub to open.

•Make up the drill bit to the proper torque with a bit breaker and the rig tong placed on the output shaft directly above the bit. Do not put rig tongs on the sealed bearing assembly housings. Inspect the output shaft seal area for any indication of an oil leak.

NOV motors are shipped from the service center with the adjustable housing set at zero degrees, unless otherwise requested. To set the adjustable housing to a different angle, refer to Section 7 Adjustable Assembly Operating Instructions on page 49.

Running InThe drillstring with a straight NOV motor installed can be run into the hole normally. When using a bent sub, or a non-zero angle in the adjustable housing, be careful passing the motor through the blowout preventers, casing shoes, liner hangers, ledges, or key seats to ensure that the motor or drill bit does not hang up. Do not run into bottom, or “bottom fill”, as it could plug the bit or damage the motor.

Page 34: Nov mud motor handbook

Motor Handbook, 7th Edition

26

Warming a Motor for High BHTWhen running into a hot hole, it is important to gradually warm the motor during its descent.

1. Run in hole and stop at the depth where the expected downhole temperatures are in the range of 240°F to 260°F (115°C to 125°C).

2. Stop and pump drilling fluid to cool the motor.

3. Pump for about three minutes every 400-500ft until you reach bottom.

4. At bottom start at around half the de-rated pressure and work up to the max de-rated pressure over thirty minutes. Refer to the NOV Downhole Temperature Max Pressure De-rating guidelines on page 39 to determine max de-rated pressure.

Note: Avoid long periods without circulation if possible.

Warming a Motor in Cold ClimatesWarming up a motor in colder climates may be completed to aid in the makeup of connections to the drill string and bit, and is recommended for increasing reliability of the motor. When performing this process using steam, the motor should be evenly heated to the point it is warm to touch. One option is to run the motor down into the BOP and put the steam hose down in the BOP next to it, and leave it for 10-15 minutes to warm up. Spot heating or heating the motor until it is too hot to touch can cause damage to seals, the stator elastomer, or other components. Circulation should be started slowly and increased gradually to avoid damaging the cold elastomeric liner.

Starting the MotorBegin circulating “off bottom” with the bit turning freely. Perform circulation and pressure tests at the same circulation rates as the surface test, and note the readings. The pressure will be higher due to the restrictions of the drillstring components added. The “off bottom” pressures noted may be higher than calculated. This is caused by bit drag on the side of the hole due to the bent sub, adjustable housing angle, and stabilization.

DrillingAfter a short hole-cleaning circulation period, slowly lower the bit to bottom. When bottom is tagged, the standpipe pressure gauge will show an immediate increase. Increase the bit weight slowly to achieve the desired build up rate and/or rate of penetration. Do not exceed the recommended maximum differential pressure across the motor.

The “off bottom” pressure is the total system pressure (read on the stand pipe gauge), from the standpipe, through the drillstring, the annulus, and back to the drilling nipple, while circulating with the bit “off bottom” (i.e. zero weight on bit).

Periodically recheck the “off bottom” pressure. The standpipe pressure will slowly increase after hole cleaning due to the hydraulic energy required to lift the cuttings.

The torque applied to the bit while “on bottom” is directly proportional to the difference between the “on bottom” and “off bottom” pressures (i.e. there are no friction losses through the rotating drillstring). An increase in the weight on bit produces an increase in torque. As the bit drills off, the weight on bit decreases and correspondingly the pressure and torque decrease. The standpipe pressure gauge can therefore be used as a torque indicator.

Page 35: Nov mud motor handbook

27

DrillpipeTorsional Angle Values

US Metric

3 1/2” – 13.3 lb/ft 8.0° / 100 lb-ft / 1000 ft 19.3° / 100 N-m / 1000 m

3 1/2” – 15.5 lb/ft 7.0° / 100 lb-ft / 1000 ft 17.0° / 100 N-m / 1000 m

4 1/2” – 16.6 lb/ft 3.7° / 100 lb-ft / 1000 ft 9.0° / 100 N-m / 1000 m

5” – 19.5 lb/ft 2.5° / 100 lb-ft / 1000 ft 6.1° / 100 N-m / 1000 m

Operation

The range of NOV motors permits selection of the correct motor to provide the optimum combination of bit speed, bit torque, and circulation rate for maximum rates of penetration. When the drilling conditions permit, the rotary can be engaged.

Running into bottom can damage thrust bearings, and excessive overpull on a stuck bit can damage “off bottom” bearings in the sealed bearing assembly.

NOV motors are designed for extended intervals of “on bottom” drilling. Sealed bearing motors should be serviced after 150 operating hours, in standard drilling conditions. Drilling conditions other than standard, such as high WOB, high solids/sand content, corrosive drilling fluids or rotating with high bend settings will reduce this interval accordingly.

Reactive TorqueThe drill bit attached to the mud motor at the bit box turns in a right hand, or clockwise direction, if viewed from the drill floor. There is a reactive, counterclockwise (or left-hand) torque produced as a result of the torque applied to the bit. This counterclockwise torque must be considered when establishing tool face orientation and can be calculated by relating the difference between “off bottom” free spinning pressure; and actual “on bottom” operating pressure.

An estimate of the angle of twist of the drillstring can be performed as follows:

1. Measure and record standpipe pressure “on bottom” with the desired bit weight and circulation rate and “off bottom” with the same circulation rate. 2. From the Motor Specifications and Performance Sheets, obtain the torque corresponding to the difference between the “on bottom” and “off bottom” pressures. 3. The torsional angle can be determined by multiplying the above torque, the length of drillpipe in the hole and the angle values from the table below. Values are based on torsional deflection of drillpipe.

Angle of Twist= Reactive Torque × DP Length × Angle Value

Table 3: Torsional Deflection Angle Values for Drillpipe

Directional drillers can get an indication of the reactive torque from the measurement while drilling (MWD) equipment and can adjust and lock the rotary table in order to accommodate the desired tool face direction.

In most applications the use of measurement while drilling or steering tools to provide real time surface readout of azimuth, inclination and tool face is much more reliable than the single shot method of orienting.

Page 36: Nov mud motor handbook

Motor Handbook, 7th Edition

28

StallingIf too much WOB is applied, the torque required to keep the bit turning creates a higher differential pressure than the seal between the rotor and stator elastomer can maintain. The drilling fluid breaks the seal and leaks through the power section without turning the rotor, so bit ceases rotation, or ‘stalls’. An increase in standpipe pressure will occur and penetration will cease.

As the fluid leaks past, it erodes the elastomeric liner, which makes further stalling more likely and damages the liner, eventually leading to chunking. Also, stalling generates large pressure pulses, creating torque spikes that can cause chunking, connection back-off, or fracture of driveline components. Motor stall should be avoided, but when it occurs, it should be quickly remedied.

If the bit is picked up off-bottom while drilling, the “trapped” torque within the drillstring will be released uncontrollably, potentially causing damage to down-hole components or causing connections to back-off. This is especially true when a stall has occurred.

If a stall condition occurs the following procedure should be followed as soon as possible:

1. Stop rotation of the drillstring immediately

2. Shut down the pumps if possible; if not, slow down the pumps as much as possible

3. Release trapped torque slowly using the rotary table brake. 4. Lift the bit off bottom

Over-Running the BitRotating the drillstring with any positive displacement motor in a stalled condition may cause the upper portion of the motor (and drillstring) to over-run the bit. This condition can damage the stator elastomer liner and cause connection back-offs within the motor.

VibrationAlthough BHA and motor component fatigue can occur over an extended period, NOV analysis has confirmed that many motor fractures occur as the result of vibration induced fatigue over a single run. As such, it is important to mitigate vibration in order to avoid related downhole motor failures and unscheduled downtime or costly fishing trips.

There are 3 modes of vibration that can occur when drilling.

•Torsional Vibration – Stick Slip •Lateral Vibration – Bit and BHA Whirl •Axial vibration – Bit Bounce

Figure 5: Downhole Vibration Modes

Page 37: Nov mud motor handbook

29

Operation

In excessive quantity, these vibrations can considerably reduce drilling performance and in extreme cases, can cause significant damage to the bit, motor and other downhole components. There is a complex combination of factors that can have an effect on downhole vibration. NOV provides tools such as the BlackBox® Dynamic Data Recorder, MWD systems, and VibraSCOPE™ Drillstring Dynamics Modeling to help reduce vibration by optimizing the drilling system.

Torsional Vibration (Stick Slip)Torsional vibration is the cyclical rotational acceleration and deceleration of the bit, BHA, or drill string. If the torsional vibration is severe, stick slip can occur. Stick slip is the momentary stop in rotation of the bit or BHA that can cause the drill string to instantly torque up then release, accelerating the BHA to dangerously high speeds (often 2-3 times rotary speed, but can go as high as 15 times). This is also known as microstalling. Heat checking on the bit is usually an indication that stick slip has occurred. Torsional vibration and stick slip may occur downhole even when a constant RPM is input at the surface.

Causes •Incorrect bit selection – overly aggressive PDC bit

•Improper BHA stabilization – Undersize stabilizers

•Excessive bend in mud motors

•Tortuous hole geometries, high dogleg angles

•High WOB with low RPM

•Insufficient mass of drill collars

•Insufficient stiffness in DP and BHA

•Poor drilling practices

•Lack of lubrication in drilling mud

•Lithology – interbedded formations, formation interfaces, hard and/or abrasive stringers, formations with high friction coefficients.

•Reaming/back-reaming, hole opening, drilling out casing, control drilling

Symptoms

•Large & erratic surface RPM & torque fluctuations, especially noticeable on a top drive

•BHA/Rotary table stalling

•Whirring sound from top drive

•Cutter/insert damage; bit/stabilizers wearing undergauge

•Shoulder damage to bits with heat checking, dull characteristics. Nose

ringout on larger diameter bits

•Poor hole cleaning; under-gauge or washed out hole

•Shocks/vibrations measurements from MWD and BlackBox®

•Connection fatigue cracks; fractures of BHA components; connection back-off

•Fractured or cracked motor drive line components such as bearing mandrels, driveshafts or driveshaft adapters

•Thrust bearing cage damage (cage bar deformation or fractures)

•Excessive drive assembly wear at articulating engagement points

Page 38: Nov mud motor handbook

Motor Handbook, 7th Edition

30

Solutions •Reduce WOB and increase RPM

•Increase weight and stiffness of BHA (Inclination <60°)

•Select NOV PDC bit that includes Torque Control Components (TCC). The TCCs control the depth of cut and help prevent torsional vibration

•Run a VibraSCOPE™ of the BHA and identify stable RPMs

•Measure torsional vibration with the BlackBox® recorder and calculate optimum RPM ranges for each formation

•Increase the diameter of the drill pipe to allow for more efficient torque transfer to the bit and BHA

•Improve the tortuosity of the borehole by minimizing the motor bend setting and sliding over longer intervals

•Use stabilization or roller reamers to improve borehole quality

•Improve the lubrication qualities of the drilling fluid

Lateral Vibration (Bit/BHA Whirl)Lateral vibration is caused by the high bending stresses in the BHA and drillstring resulting in the assembly impacting on the borehole wall. Lateral vibration can be extremely damaging to all drillstring components and result in energy being removed from the system that would otherwise be used to drill ahead. High lateral vibration will result in a reduction in penetration rate and premature bit and BHA failure including motor housing fractures.

Causes •Harmonic resonance of drill string

•Excessive RPM; Stick slip

•High tortuosity of the wellbore

•Formations with high coefficients of friction and restitution

•Lack of BHA stabilization

•Incorrect parameter selection

•Excessively heavy BHA in a high angle hole

•Low WOB with high RPM

•Lack of lubrication in mud

•Reaming/back-reaming, hole opening, drilling out of casing

•Incorrect bit selection

Symptoms •Poor penetration rates and higher MSE than expected for that formation

•Damage to the bit is probably in the shoulder or randomly scattered across the body. Dull characteristics will be chipped and broken or missing cutters.

•Sensitive electronic tools may be damaged or destroyed

•Connection fatigue cracks or fractures on BHA components

•Real-time lateral vibration data from various MWD tools

•Rotary torque fluctuations

•Rapid eccentric (during forward whirl) or concentric (during backward whirl) BHA component OD wear

Page 39: Nov mud motor handbook

31

Operation

Solutions •Pick up off bottom and hold string stationary until all energy is released (typically a couple minutes). Go back on bottom with reduced RPM and higher WOB.

•Increase WOB and reduce RPM and try to confirm with downhole measurements.

•Run a VibraSCOPE™ of the BHA and identify stable RPM

•Measure lateral vibration with the BlackBox® tool and calculate optimum RPM/WOB ranges for each formation.

•Increase the diameter of the drill pipe to allow for more efficient torque and weight transfer to the bit and BHA

•Improve the tortuosity of the borehole by minimizing the motor bend setting and sliding over longer intervals

•Improve the lubrication qualities of the drilling fluid

•Use stabilization or roller reamers to improve borehole quality

•Rotate the drill string at a Lower RPM and higher WOB

•Bit selection to include lateral mitigation features include design with high Lateral Stability Index (LSI) and SteeringWheel® Gauge technology

Axial Vibration (Bit Bounce)Axial vibration is caused by a cyclical loading and unloading of the bit and the BHA in the axial direction. It is also often referred to as “bit bounce”; however be very clear that it rarely results in the bit leaving the bottom of the hole. It normally results in a rapid cyclical movement of the neutral point in the BHA that causes the WOB to rapidly increase and decrease. Extreme torsional vibration can also contribute to axial vibration resulting in the cyclical shortening and lengthening of the drill string. Axial vibration is normally associated with (but not limited) drilling with large diameter roller cone bits in hard formations.

Causes •Axial harmonic resonance of drill string.

•Excessive RPM

•Hard formations with high compressive strengths. (Hard sandstones, hard limestones, quartzites, conglomerates & igneous rocks, etc.)

•Incorrect parameter selection. Parameter selected gives the BHA a propensity to go into axial harmonic resonance

•Drilling with large diameter roller cone bits

•Excessive WOB with high RPM

Symptoms •Large WOB fluctuations (shaking hoisting equipment)

•Poor penetration rates and higher MSE than expected for that formation

•Damage to the bit demonstrates impact damage characteristics, broken cutters on all cones particularly the outer rows. Internal inspection of bearings may find Brinell marks.

•Run NOV Downhole BlackBox® HD tool and measure axial accelerations in the drill bit.

•Real-time axial vibration data from various MWD tools

•Damaged BHA components

•Sensitive electronic tools may be damaged or destroyed

Page 40: Nov mud motor handbook

Motor Handbook, 7th Edition

32

Solutions •Change RPM and WOB combinations to try and get a stable drilling situation and the MWD axial sensor informs you that the vibration has gone away.

•Run a VibraSCOPE™ of the BHA and identify stable RPM zones with a low risk of axial vibration.

•Measure axial vibration with the BlackBox® HD tool and calculate optimum RPM/WOB ranges for each formation drilled.

•Change drill bit from Roller Cone to PDC.

•Replace rotary BHA with a motor BHA that generates high ROPs with less WOB and higher RPM.

Rotary RPMWhile rotating the drill string can provide benefits such as improved hole cleaning and reduced drag, rotating a bent motor creates high bending stresses in the motor housings, and can eventually lead to fatigue fracture. This risk grows as the hole curvature increases and higher bend settings are used.

Each motor configuration shown in SECTION IV: MOTOR PERFORMANCE DATA displays a chart of “Maximum Adjustable Bend Settings for Rotary Drilling”. This chart shows the maximum bend setting, in degrees, for continuous rotation of the drill string at various hole curvatures. Note that the practice of alternating between rotating and sliding through a curve will create micro-doglegs that are higher than what may be shown on a survey report.

These limits apply to ideal hole conditions with smooth drilling operations. Challenging conditions such as poor hole quality, hard formations, high WOB, vibration, stick-slip, and stalling, may necessitate further reduction in the bend setting used, to prevent motor housing fracture.

Rotating the drillstring while subjected to bending loads produces fatigue loading on the motor. These bending loads can be produced even when using adjustable bend settings that are within the recommended values. Note: NOV recommends a maximum bend setting of 1.83° for rotarydrilling.

The maximum recommended drillstring rotational speed for NOV motors is 50 RPM. This 50 RPM limit helps extend the life of the tool by limiting fatigue cycles and helping to avoid excessive vibration and whirl. Rotary speed should be decreased as necessary based on local conditions. It may be feasible to exceed the 50 RPM limit if using an MWD system to monitor vibrations and collar RPM in real-time at the rig, so downhole vibrations can be mitigated. NOV can provide evaluation of critical RPM speeds for BHA configurations using our custom VibraSCOPE™ analysis program.

Motor Pressure DropExceeding the maximum recommended differential pressure across the motor will reduce the stator life. Circulation rates exceeding the recommended values also reduce the rotor and stator life.

To understand the conditions affecting the pressure drop across a power section, the following should be recognized:

Page 41: Nov mud motor handbook

33

Operation

•The pressure drops across the top/dump sub, adjustable assembly, driveshaft assembly and bearing mandrel of the bearing assembly are dependent on the circulation rate only (i.e. torque has no effect). This pressure drop increases as the circulation rate increases. This “no load” pressure drop across the motor at a specific flow rate is shown for each motor configuration in SECTION IV: MOTOR PERFORMANCE DATA

•The pressure drop across the power section increases linearly as the torque increases, assuming a constant circulation rate.

•The effect of mud weight alters the pressure drop across the motor at no load. However, it has a negligible effect on the pressure increase due to the torque “on bottom”.

Bit Pressure DropContinuous excessive pressure drops across the bit can cause early seal failure in sealed bearing motors. The bit pressure drop should be limited to 1,500 psi (10,000 kPa) for continuous drilling.

The ‘ML3’ mud-lubricated motors, and ‘ST1’ and ‘ST2’ sealed bearing motors incorporate the use of flow restrictors, which bypass some amount of flow away from the bit. The percentage of flow that bypasses through the flow restrictors will vary between applications, as it is dependent on several factors:

•Mud weight and viscosity

•Bit pressure drop

•Clearance between flow restrictors

Note that other tools run below the motor which create additional pressure drop will effectively increase the “bit pressure drop” experienced by the motor, so will cause more flow to bypass through the flow restrictors. These pressures must be added together to obtain a total “bit pressure drop” to consider when calculating restrictor bypass flow.

The ‘ML3’ mud-lubricated motors require a certain amount of flow through the bearings to provide lubrication. The amount of flow that passes through the bearings will depend on the bit pressure drop – bits run with a Total Flow Area (TFA) too large will not create sufficient back pressure to force the required flow through the bearings. The result can be seized bearings, from overheating due to lack of lubrication. Contact NOV Downhole for guidelines for maximum TFA to provide sufficient lubrication.

Power Section FitsThe power section elastomer may swell or shrink over the course of the job, depending on the mud type and downhole environment. This affects the fit between the rotor and stator in the power section, either making the fit tighter or looser. An ideal fit is essential to maximize elastomer life and to achieve optimum drilling performance from the power section. If the fit is too tight, excessive heat will build up in the elastomer due to friction which decreases elastomer strength and in extreme cases, lead to chunking of the elastomer. If the fit is too loose, excessive slippage (leaking across cavities in the power section) will result which leads to decreased RPM and torque at increased pressures. This is referred to as a weak motor.

Fit is calculated using the following formula:

Fit = (Rotor Major Diameter – Lobe Height) – Stator Minor Diameter

Page 42: Nov mud motor handbook

Motor Handbook, 7th Edition

34

ROTOR MAJOR Ø

LOBE HEIGHT

STATOR MINOR DIAMETER

ROTOR MAJOR Ø - LOBE HEIGHT

ROTOR MAJOR Ø

ROTOR MAJOR Ø - LOBE HEIGHT

Typically, there is one rotor profile size for a given power section model and fit is adjusted with different stator elastomer profiles. There are 4 general categories of fits:

•Undersize (US)… provides the tightest fit (most interference)

•Standard (STD)

•Oversize (OS)

•Double Oversize (2xOS)… provides the loosest fit (most clearance)

Factors that can affect fit for a power section are:

•Type of Drilling Fluid – Oil Based Mud, Water Based mud, Air/gas (See Table 4: Basic Chemical Compatibility Chart on page 36.)

•Elastomer Type – NBR, HNBR, PowerPLUS™

•Bottom Hole Temperature (See Downhole Temperature on page 39.)

•Abrasive Mud – High solids or sharp particles in mud wear the elastomer causing a looser fit.

HEMIDRIL even wall power sections are typically only required to have a Standard fit option. Because of the even thickness of the elastomer, significant deformation of the elastomer is less prominent making fits other than standard unnecessary.

Drilling FluidsProper use of drilling fluids (a.k.a. drilling muds) is an essential part of the overall drilling process. The main functions of a drilling fluid include:

•Removing drilled cuttings from the borehole

•Transmitting hydraulic pressure

•Suspending cuttings and LCM when not drilling

•Controlling formation pressures

•Promoting wellbore stability

•Cooling and lubricating bit and BHA

•Preventing/limiting corrosion

A large variety of additives are used to achieve these different functions plus have many other specific applications. While drilling fluids can vary greatly in purpose and composition, they typically fall into one of the following types:

•Air/Gas (See Air or 2-Phase Drilling on page 21)

•Water based mud (WBM)

•Oil based mud (OBM)

•Synthetic based mud (SBM)

Figure 6: Power Section Fit

Page 43: Nov mud motor handbook

35

Operation

Drilling fluids with a pH below 4 or above 10 can cause damage to the stator elastomer and seriously attack the plated components. Circulation through the rotor and stator can minimize this damage and should thereforebe maintained when operating in drilling fluids close to the limits of this pH range. Allowing the drilling fluid to stagnate will aggravate the problem. The motor should be flushed and serviced as soon as possible – refer to Rig Site Maintenance on page 42.

Drilling mud with a density of more than 16.7 PPG (2.00 kg/L) will cause abnormal erosion of motor internals due to suspended materials within the mud. Silicate mud is also known to be extremely abrasive.

Well-mixed medium to fine lost circulation material (LCM) can be used without plugging or motor damage. If coarse lost circulation material is to be used, a circulating sub should be installed above the motor assembly to bypass the motor.

A good rule of thumb is no more than 2 1/2 lbs (1.13 kg) of LCM per barrel.

Abrasives in the drilling mud will reduce the life of the motor in several ways:

•Erosion of the stator liner leading to more leakage and higher likelihood of stalling,

•Erosion of the rotor coating leading to damage of the stator liner

•Erosion of driveline components leading to component fracture

•Seal damage in the bearing assembly leading to mud invasion and bearing seizure

Generally, high gravity solids are not highly abrasive and are required for pressure control in the wellbore, and therefore NOV does not specify an upper limit for HGS. It is recommended that the content of potentially abrasive low gravity solids (LGS) be minimized (below 5% if possible) to extend the life of the mud motor. LGS contents of 7% or below for lower mud weights and to 6% or below for higher mud weights and higher temperatures are standard recommendations by NOV Fluids Services to extend the life of the mud pump liners. Rock types that are potentially abrasive are: Sandstone, Siltstone, Conglomerate, Chert, Granite, Tuff, and Gneiss. It is recommended that sand content be maintained at 1% or below. Run times may need to be shortened to avoid downhole motor failure if the above recommendations are not followed.

Never try to cement through a motor as the motor and bit-jets shear the cement and the cement will immediately flash set.

Oil Based Drilling FluidsThe aniline point of an oil-based mud is an indication of its tendency to cause swelling of elastomeric parts (e.g. stator, seals), and is a measure of the oil’s aromatic content. The swelling tendency increases with a lower aniline point. The aniline point gives a measure of the solvent power of a petroleum product for aniline, which is related to its solvent power for many materials. This solubility increases with increasing temperature. Note that the aniline point may vary significantly between suppliers of the sameproduct, for example, diesel.

The lower the aniline point, the more readily the oil will permeate and swell the stator elastomer liner and reduce its hardness and strength. The swelling increases the interference between the rotor and stator and results in heat build-up that leads to rapid destruction of the stator elastomer liner.

Page 44: Nov mud motor handbook

Motor Handbook, 7th Edition

36

Elastomer Description(Monoflo®

Elastomer Code)

Standard NBR(RR)

Standard HNBR(OC)

PowerPLUSNBR(PRR)

HEMIDRIL

(HD)

Continuous BHT Water Based Mud

Below 220°F(Below 104°C)

PreferredStd Fit

Not PreferredPreferred

Std FitPreferred

220°-280°F(104°-138°C)

PreferredOS Fit

Not PreferredPreferred

OS FitPreferred

280°-320°F(138°-160°C)

Preferred2xOS Fit Not Preferred

Preferred2xOS Fit Preferred

Continuous BHT Oil Based Mud

Below 220°F(Below 104°C)

PreferredStd Fit

AcceptableStd Fit

PreferredStd Fit Preferred

220°-280°F(104°-138°C)

PreferredOS Fit

AcceptableOS Fit

PreferredOS Fit Preferred

280°-320°F(138°-160°C)

Caution2xOS Fit

Preferred2xOS Fit

Caution2xOS Fit

Preferred

Above 320°F(Above 160°C)

Not PreferredCaution2xOS Fit

Not Preferred Caution

NOV has seen higher frequencies of stator chunking incidents when run in drilling mud with aniline point below 140°F (60°C). Elastomeric compounds seem to perform better in mineral based mud systems than in diesel oil based systems. Low toxicity oil base systems are easier on elastomers because they contain fewer aromatics. Also Nitrile elastomers with high acrylonitrilecontent(ACN≥39%)havealowerswellinginlowanilinepoint fluids and therefore are the elastomers of choice in such applications (NOV’s Standard HNBR and PowerPLUS NBR elastomers meet this criteria). Power sections with larger clearances are available to minimizethe effects of swelling.

OBM Run PracticesDue to the varied molecular weights of hydrocarbons in many oil-based drilling fluid systems, it is not recommended that components that have elastomeric components be used for more than one downhole trip. Lower molecular weight hydrocarbons have a higher propensity to penetrate into the elastomer matrix causing problems not limited to loss in elastomer modulus, accelerated heat aging, changes in elastomer volume, leaching of crucial elastomer ingredients, and rubber-to-metal bond degradation. While some elastomers are more resistant to the differences in drilling fluids, the uncontrollable variance of oils, diesel, and other organic fluid additives make the predictable run life of the elastomeric elements impossible to determine. Therefore, whenever possible it is not recommended to subject components that have elastomeric elements for more than one downhole trip, independent of duration, temperature, loading, or any other factors that would typically affect an elastomer.

H2S (Sour) ServiceNOV motors are manufactured from steels of hardness in excess of that allowed by the National Association of Corrosion Engineers (NACE) Specification MR0175. This hardness is required to achieve the strength necessary for use in the drillstring, but it renders it susceptible to sulfide stress cracking (SSC). As a consequence the drilling environment should be controlled if these tools are to be used in sour environments.

Table 4: Basic Chemical Compatibility Chart

Page 45: Nov mud motor handbook

37

Operation

The drilling environment may be controlled using one or more of the following (Reference NACE MR0175):

1. Maintenance of the drilling fluid hydrostatic head to minimize formation fluid in-flow.

2. Use of chemical sulfide scavengers.

3. Use of a drilling fluid in which oil is the continuous phase. NOTE: Low aniline point oil based drilling fluids can damage stator liner and cause premature failure.

The following specifications provide recommendations for drilling sour wells and for the control of the drilling environment:

1. The American Petroleum Institute (API) Recommended Practice RP7G Section 9.

2. The National Association of Corrosion Engineers (NACE) Specification MR0175, “Sulfide Stress Cracking Resistant Metallic Materials for Oilfield Equipment”.

3. Alberta Recommended Practices for Drilling Critical Sour Wells.

The time that a motor is exposed to H2S in a typical drilling application is insufficient for H2S to cause damage to the elastomers (e.g. stator liner)within the motor.

The Effects of Chlorides on Power SectionsDrilling fluids containing chlorides can reduce rotor and stator life due to corrosion, especially at elevated temperatures. Special attention should be paid to the internal coatings when the chloride concentration is in excess of30,000 PPM. The motor should be flushed and serviced as soon as possible if it has been exposed to chlorides – refer to Rig Site Maintenance on page 42.

Drilling fluids are blends of several chemicals in water or oil based media. Some of these ingredients can negatively impact the performance of an elastomer compound. KCl, a common ingredient in water based mud (WBM), is used as a source of potassium as a Base Exchange ion to stabilize drilled shales. Published test data supports the belief that KCl does not have any detrimental effects on the elastomers used in power section stators; however, this is not always true.

When changes in mechanical properties of an elastomer occur as a result of exposure to a fluid containing chlorides, the most likely catalyst is not the chloride, but one or more of the ingredients within the fluid. Although the impact of chlorides to the mechanical properties of elastomers is minimal, high chloride water based fluids can permeate through the elastomer, especially high acrylonitrile base polymers. Fluid that permeates through the elastomer to the base metal is able to interact with the adhesion bond between the elastomer and metal tube. This can result in leaching of materials from the bond system and corrosion of the substrate material, resulting in a progressive loss of adhesion strength. This bond hydrolysis phenomenon is accelerated when high temperatures (250°F [121°C] and above) are involved. A weakened bond system can allow the elastomer to separate from the tube under normal loading conditions, leading to premature stator failure.

When possible, use an alternate K donor such as potassium acetate, potassium carbonate, potassium lignite, or potassium hydroxide for drilling fluids that can negatively affect the stator elastomer. If an alteration to the drilling fluid is not possible, it is recommended to use PowerPLUS™ with the appropriate fit selection based upon temperature and fluid interaction for applications using a WBM with high chloride content.

Page 46: Nov mud motor handbook

Motor Handbook, 7th Edition

38

Coating Type

Below 30,000 ppm

30,000 to 75,000 ppm

75,000 to 150,000 ppm

Above 150,000 ppm

HCPCorrosion can occur but not

common

Low level corrosion possible

High level corrosion possible

Do not use

WCAcceptable for

useAcceptable for

useAcceptable for

useAcceptable for

use

Chlorides can also have a negative effect to rotors. The base metal rotor is always coated with a material to offer abrasion resistance, chemical resistance and improve coefficient of friction properties. A typical coating used is hard chrome plating (HCP). Chrome is applied through an electroplating process in which the chrome applies itself as layers on top of the base metal. These layers have separations, commonly known as micro-cracks, throughout the coating. Aggressive fluids are able to permeate through the micro-cracks to the base substrate metal with negative impact. WBMs with high chloride content and high temperatures are especially aggressive in coating permeation.

A common result is flaking of the chrome and pitting of the base metal. Chrome flakes can damage the stator elastomer as it is passed through the power section. In these situations, a coating with less porosity should be selected to prevent damage to the power section. A typical coating used is tungsten carbide (WC), which has a very low porosity and is intended forhigh chloride applications.

In WBM for chloride content up to 30,000 ppm, the use of HCP is acceptable. Beyond this limit the chloride will have a negative impact to the chrome coating, affecting the overall integrity and life of the chrome. The severity of impact is dependent on application factors such as length of exposure, chloride content and exposure temperature.

A basic recommendation for chloride levels in WBM with high temperatures is per the following:

Drilling Fluid AdditionsWhile drilling with a motor attached to the BHA, a need to modify the complete or partial composition of the drilling fluid (mud) may be identified. This will require the addition of standard drilling fluid constituents, and/or various additives such as lubricants, surfactants, corrosion inhibitors, viscosity modifiers, lost circulation material (LCM) and others. It is important to note that, while the overall composition of the drilling fluid may not change significantly, and may be safe to pump, the pumping of manyof these materials through the motor in a highly concentrated form can significantly reduce the work-life and reliability of motor components.

For example, while changing the type of drilling fluid, the addition of a single slug of diesel may mean that locally (within the motor) the drilling fluid composition is close to 100% diesel for a period of time. Or, while adding solids to the mud, the overall concentration of mud solids may only be increasing from 4% to 5% total, but the solids concentration within the motor during the addition may be significantly higher, and significantly more damaging. This may be even more significant when pumping a pill of lost circulation material (LCM), as some types of LCM use solids and particulate that will damage or reduce the service life of stator elastomers, plated sealing surfaces, and steel housings and internals.

Table 5: Chloride Content

Page 47: Nov mud motor handbook

39

100(38)

120(49)

140(60)

160(71)

180(82)

200(93)

220(104)

240(116)

260(127)

280(138)

300(149)

320(160)

Temperature °F (°C)

US Fit 2xOS FitStd Fit OS FitUS Fit 2xOS FitStd Fit OS Fit

100%

90%

80%

70%

60%

50%

40%

30%

95%

85%

75%

65%

55%

45%

35%

Undersize Fit

Standard Fit

Oversize Fit

Dbl Oversize Fit

Operation

While NOV understands that the use of concentrated pills and sweeps of fluid may be necessary during drilling operations, their effect on the longevity and effectiveness of the motor should be considered by the customer before their use. When possible, NOV recommends that the addition of solids and chemicals be done in stages while pumping to minimize the impact of high localized concentrations of these drilling fluid additions. When practical, pulling out of hole and removing the motor from the BHA before pumping a sweep or a pill may also extend motor life and reliability.

Downhole TemperatureAn increase in static downhole temperature reduces the strength of the stator elastomer liner. Consequently, the maximum recommended pressure drop across the power section should be reduced to avoid stator elastomer premature deterioration. As Figure 7 shows, no reduction in maximum pressure drop is necessary up to a temperature of 140°F (60°C). Beyond that temperature, the maximum recommended differential pressure obtained from the performance curves (SECTION IV: MOTOR PERFORMANCE DATA) should be multiplied by the ΔP Reduction Factor shown in Figure 7.

For example, if the maximum recommended differential pressure is 600 psi and the static downhole temperature is 200°F (93°C), the operating full load pressure is calculated by multiplying 600 psi by a ΔP Reduction Factor of 68%, yielding 408 psi.

The shaded regions in Figure 7 reflect the recommended stator fit at the continuous BHT. While a Standard Fit stator can be used at temperatures higher than 220°F (104°C) it is susceptible to premature failure due to excessive interference fit. Likewise, an Oversize Fit can be used at temperatures below 220°F (104°C) but may not perform as desired due to the looser fit which could allow fluid to leak through the cavities resulting in a weak motor. Temperatures outside 320°F (160°C) should be consulted with NOV Downhole Engineering prior to installation. HEMIDRIL® stators are also subject to reduction of elastomer strength due to high temperatures, therefore, the Max Pressure De-rating for Power Sections curve should also be followed for HEMIDRIL applications. However, HEMIDRIL stators are available only with a standard fit because the even wall cross section prevents excessive deformation of an elastomer due to temperature.

Figure 7: Max Pressure De-rating for Power Sections

Page 48: Nov mud motor handbook

Motor Handbook, 7th Edition

40

Plugging OffThe motor may plug off with cuttings entering the drillstring through the filter plugs in the dump sub ports. To prevent this occurrence the hole should be circulated to achieve “bottoms up” before running in the hole with a motor.

This may also occur upon breaking connections when drilling cement or unconsolidated sands, etc. As the annulus loads up with cuttings and the kelly is broken off, “U-Tubing” occurs, (i.e. the pressure in the annulus exceeds the pressure in the bore due to different fluid densities). If this occurs, immediately make the kelly back up and re-commence circulation and ensure that the hole is cleaning properly. In some cases it may be necessary to blank off the dump sub.

Back ReamingBack reaming should be avoided if possible. Uncontrolled or poorly managed back reaming can be a high risk operation that can lead to a stuck BHA, a packed off hole, hole and formation damage and hole collapse. Back reaming adds to the loading that the off-bottom bearings in sealed bearing motors experience, in addition to the thrust load from the rotor and the weight of the bit or other tools below the motor. These additional loads will reduce the bearing life. Back reaming through curved sections or high doglegs will also create high side loading on the radial bearings. Vibration is generally worse when back reaming because the bottom of the BHA is no longer supported (See Stalling on page 28). Using a BlackBox and VibraSCOPE™ should be considered to review vibration characteristics from previous wells and aid in the selection of the proper BHA components.

If back reaming cannot be avoided, it should always be supervised by the driller or competent rig personnel. An MWD tool should be run to monitor and control shock levels and collar RPM in real time at the rig. The harmful effects of the motor associated with back reaming need to be minimized to prevent motor failure. In order to reduce the stresses, it is recommended to reduce the flow rate by a minimum of 30% to help extend bearing life, but sufficient to ensure cooling and cleaning of the bit and motor bearings. Using an adequate flow rate will also minimize the chances of hole washout if the assembly is maintained in the same position for any length of time.

The rotary speeds should be kept at a maximum of 40 RPM, and the maximum over pull limits of the motor should not be exceeded (See Motor Comparison tables-Pull to Re-run in Section 9). These guidelines are only to be used within the limits of the Maximum Adjustable Bend setting for Rotary Drilling tables in Section 10.

If there is a need to rotate at a faster rate than is recommended, RPM should be as low as possible. Higher rotary speeds will increase the possibility of catastrophic motor failure if drilling conditions are not monitored and actions taken to minimize harmful effects on the motor. These include increased shocks/vibrations, which can cause motor housing fracture, connection back offs, and premature bearing failure. Also, if back reaming is anticipated, the proper BHA components with back reaming cutting features should be chosen.

Hydraulic ExtensionWhen using a positive displacement motor, the drillstring stretches when bottom is tagged, increasing the weight on bit. The sequence is as follows:

1. The motor is running freely “off bottom”.

2. When the string is lowered and the bit tags bottom, the torque required to drive the bit causes an increase in the pressure across the motor.

Page 49: Nov mud motor handbook

41

Operation

Partial Rotor BypassNOV low speed motors with bored rotors permit higher circulating rates than normally recommended as a portion of the circulating fluid passes through the rotor center rather than the rotor stator interface. It should be understood that the pressure drop across the rotor bore bypass is the same as the pressure drop across the power section. At a very low circulation rate, below a practical rate for operation, all circulation could be through the rotor bore bypass and the rotor and output shaft will not turn due to the static friction between the rotor and stator elastomer liner.

At high circulation rates “on bottom”, operating near the rated torque of the motor, the resulting pressure drop across the power section causes a substantial portion of total circulation to be directed through the rotor bore, keeping the flow through the rotor stator interface within recommended operating limits.

At high circulation rates “off bottom”, the pressure drop across the power section is low. Consequently, the portion of the circulating fluid passing through the bypass is low, and the motor speed will exceed its recommended limit. In order to avoid major damage, high circulating rates “off bottom” for the purpose of checking pressure drop, should be kept to a short duration.

When circulating “off bottom”, for the purpose of hole cleaning, the circulation rate should not exceed the maximum recommended for standard motors without bored rotors.

Refer to Section 6, Nozzle Selection on page 47, for details.

Running Additional Tools Below theMotorWhen running other tools below a bent motor, consideration must be made for the additional “bit-to-bend” length that the tool adds below the motor. Increasing this length will increase the bending stresses on the motor housings. NOV Downhole Engineering can provide adjusted “Maximum Adjustable Bend Setting for Rotary Drilling” limits for these situations.

NOV motors have been used successfully with running rotary steerable tools below a straight motor. Typically, the PowerPLUS™ and HEMIDRIL® power sections are preferred, due to their higher torque output and reliability. Depending on the rotary steerable system (RSS) used, the no bypass motors are preferred (‘ST3’ motors) to send all the flow to the tool without flow/pressure loss through the flow restrictor. See Bit Pressure Drop on page 33 for more information on the effects of running additional tools below the motor.

This increase in internal pressure in the drillstring causes the drillpipe to stretch and correspondingly, increases the weight on bit.

Usually the bit “drills off” and when the string is again lowered, the above sequence repeats. However, under certain circumstances the motor may stall and not drill off, and drilling with a positive displacement motor becomes virtually impossible. The hydraulic extension maximizes due to the stall pressure, and causes the bit to become imbedded. One solution is to change the drill bit to a less aggressive style to avoid imbedding. An alternate solution is to use a motor with a higher lobe configuration because these require less pressure drop across the rotor and stator to produce the same torque.

Page 50: Nov mud motor handbook

Motor Handbook, 7th Edition

42

Motor Size Available Nozzle Sizes3 3/8” – 5” 4/32, 5/32, 6/32, 8/32, 10/32

6 1/4” – 11 1/4” 6/32 – 24/32 in 2/32 increments

Motor Size Max Endplay to Rerun ‘M3’ Motor5” 5/16”

6 1/2” 7/16”7” 7/16”8” 1/2”

9 5/8” 11/16”

Soft Stall with a NozzleWhen using a nozzle, a motor stall doesn’t cause a spike in standpipe pressure, making a stall difficult to detect. When stalled, the majority of the flow goes through the nozzle which negates the pressure spike. An increase in differential pressure and no ROP are the only signs that it has stalled. This is called a soft stall.

If a soft stall is detected, flow should be immediately reduced or if possible, stopped altogether, prior to lifting off bottom. See Stalling on page 28 for more information.

Tripping Out & Checking the MotorNo special procedures are required for tripping out of the hole with a sealed bearing assembly (e.g. ‘ST3’ and ‘SR3’ motors). These motors are set with endplay of 0.020” to 0.060” when assembled, which is barely noticeable at the rig – if noticeable endplay is observed, return motor for servicing.

If the motor has a mud-lubricated bearing assembly (e.g. ‘ML3’ motor), the maximum allowable endplay can be checked and compared to Table 7.

Note: It is normal to see a small amount of drilling fluid draining from the vent plugs and in certain models from the lower end of the seal bearing assembly, just above the output shaft.

Note: Lighter mud weights will typically drain while tripping out of hole. A motor that has not drained does not suggest that the motor is damaged. It is important to follow the procedures outlined in Section 5 to ensure proper motor operation.

Rig Site MaintenanceWhen drilling fluids containing chlorides have been used, it is imperative the NOV motor is flushed, ideally with fresh water, before being laid down. Leaving the motor unserviced causes severe pitting of the plated surfaces, resulting in potential seal damage, seal leakage and stator elastomer

Table 6: Available Nozzle Sizes

Table 7: Max Allowable Endplay to Re-run

Rotor NozzlingSometimes it is necessary to have a higher flow rate than what is recommended for a given power section in order to run tools below the motor assembly. In these situations, a limited amount of additional flow can be bypassed through the rotor using a nozzle, effectively increasing the total flow rate, without exceeding the required flow rate through the power section.

The Nozzle Selection Guide can be found on page 47. Nozzles are selected based on mud weight, total required flow rate, differential pressure, and motor flow rate for required RPM (flow required between the rotor and stator).

Page 51: Nov mud motor handbook

43

Tool Size Torque(lb-ft) (N-m)

1 7/16” 300 4001 11/16” 750 1,0002 1/8” 1,250 1,7002 3/8” 1,600 2,2002 7/8” 2,000 2,7003 1/8” 3,000 4,1003 3/8” 5,500 7,4003 1/2” 4,000 5,4003 3/4” 5,000 6,8004 3/4” 9,000 12,200

5” 12,000 16,0006 1/4” 25,000 34,0006 1/2” 22,000 30,000

6 3/4” / 7” 28,000 38,0007 3/4” 42,000 57,000

8” 41,000 56,0009 5/8” 68,000 92,00011 1/4” 80,000 108,000

Operation

Motor StorageStoring a power section with the rotor assembled with the stator for long periods of time without rotation can cause permanent deformation of the stator elastomer called compression set. To prevent this damage, NOV Downhole recommends that the power section is stored for no more than 7 days without rotor rotation. This duration includes the time from when it was assembled in addition to the storage time on the rig site. Whenever possible, store the rotor outside of the stator.

Table 8: Make-up Torque, Top Sub, or Dump Sub to Stator

damage. In addition, the internal walls of motor housings and internal torque-bearing components may be subjected to the negative effects of corrosion and corrosion pitting. This pitting creates stress concentrations which can contribute to the initiation of fatigue cracks at future stresses and loads significantly below the motor’s design capacity. To enhance the reliability and extend the life of the motor, proper flushing after motor use isrecommended.

If a dump sub is used, after the tools are removed above the dump sub, clean fluid should be poured into the top of the dump sub and the piston actuated with a hammer handle several times until it travels freely up and down. Fluid should be flushed through the dump sub ports, again actuating the piston until free travel is obtained.

Install the ported lift sub. Lift motor and place in bit breaker. Secure the motor with a chain tong on the tool body. While slowly rotating the table clockwise, for a minimum of 6 turns, add clean fluid in the top or port provided.

NOTE: This procedure may cause internal threads to back off ifperformed too rapidly.

It may become necessary to remove and replace the dump sub or top sub in the field (e.g. to replace a rotor jet, if so equipped). This may not be possible if the top sub to stator connection has been secured using a thread locking compound such as Loctite or Torq-Lok during assembly. Contact the supplier of the motor to inquire whether this type of compound was applied. After adjustment, the connection must be torqued to the values specified in Table 8.

Page 52: Nov mud motor handbook

Motor Handbook, 7th Edition

44

When rotating the rotor, always use a lubricant such as water or inert hydraulic oils. Use of drilling mud or any other petroleum based oil could result in chemical degradation of elastomeric elements prior to operation, which could negatively affect performance and life. For temperatures below 40°F (4°C) to -20°F (-28°C) glycol should be used as the lubricating source for standard NBR elastomers. If the elastomer is HNBR use a vegetable oil or mineral oil such as methylcyclohexane. At the completion of the rotation, the lubricating fluid should be drained and the motor stored dry.

In cold climates (below 40°F (4°C)), heat jackets or heat trace lines could be applied to the motor to regulate components to a temperature above 40°F (4°C), to prevent thermal contraction of the elastomer. Thermal contraction in the stator can add stresses to the adhesive bond between the elastomer and the tube ID. See Warming a Motor in Cold Climates on page 26.

ServicingNOV recommends that its motors be serviced after every run by an authorized NOV Downhole service facility.

At an NOV Downhole authorized service facility, the motors are visually inspected, flushed, and if necessary, run in a motor dynamometer before disassembly (if a dyno is available at that service facility). Motors are completely disassembled and all parts cleaned and inspected. Threaded connections and critical components in the motors are magnetic particle inspected by operators qualified in accordance with SNT-TC-1A. Threads and parts are redressed as necessary and worn parts are replaced. Makeup and breakout of all threaded connections are performed with an accurate torque machine (e.g. NOV TorqueMaster™ or Mini-Torque) to ensure proper torque is applied to the threaded connection. Following reassembly, the tool is filled with oil, pressure tested to verify the integrity of the seals and typically tested for proper operation (if a dyno is available).

The Service Quality Team within NOV Downhole consists of incident reporters, evaluation engineers, service technicians and SQ leaders and coordinators from around the globe. All work together to provide exceptional service delivery by ensuring the competency of motor technicians, enhancing product reliability, and providing a safe environment for the servicing of NOV motors.

Using the NOV custom-developed ‘ITrax’ reporting program, the Service Quality Team is provided with an environment to facilitate the flow of information and to capture the documentation related to any incident regardless of its point of origin. ITrax also allows for reporting on such metrics as Mean Time Between Failure (MTBF), Incidents per Thousand Jobs (Incidents per KJ), and Process Incidents per thousand Tools Shipped. The NOV custom-developed Track-A-Tool (TAT) system is used to manage the fleet of motors repaired and maintained at any one of its facilities worldwide. TAT is designed specifically to track the status and complete, individual history of all the major motor components, as well as the entire assembly. This includes operating hours, rework records, application data, etc.

The data collected in ITrax and TAT is used to further optimize motor designs through trend analysis and gain a better understanding of operating and application demands. NOV Downhole’s use of ITrax and TAT provides the company and its customers with reliable, up-to-date data on any issue that arises concerning a NOV motor.

Page 53: Nov mud motor handbook

45

SECTION III:SUPPORTING INFORMATION

Page 54: Nov mud motor handbook
Page 55: Nov mud motor handbook

47

Differential Operating Pressure

800(3030)

700(2650)

US gpm(lpm)

600(2270)

500(1890)

400(1510)

300(1140)

200(760)

100(380)

200(1380)

300(2070)

400(2760)

500(3450)

600(4140)

700(4830)

0 100(690)

800(5520)

Eq

uiva

lent

No

zzle

Flo

w R

ate

(wat

er @

68°

F (2

0°))

psi(kpa)

32/32

30/32

28/32

26/32

24/32

22/32

20/32

18/32

16/32

14/32

12/32

10/328/32

Nozzle

6. Nozzle Selection

Nozzle Selection

Figure 8: Nozzle sizes and equivalent flow rates for water

NOV motors can be supplied with a nozzle fitted in the top of the rotor to allow a portion of the total flow to bypass the rotor and stator. This option must be specified at time of order.

SelectionThe following is the procedure used to select the proper nozzle size.

1. From the motor performance curve (see SECTION IV), obtain the flow rate through the motor (Qm) for the desired motor RPM and differential pressure.

2. Subtract this flow rate from the total desired flow rate (Qt) to obtain the required flow rate through the nozzle (Qn).

3. To use the curve in Figure 8, adjust the nozzle flow rate from the actual mud weight to obtain an equivalent nozzle flow rate in water (Qe) as follows:

4. Using this equivalent nozzle flow rate (Qe) and the desired motor differential pressure, choose the required nozzle from one of the charts below. Choose the next smaller nozzle if between sizes.

Qn = Qt - Qm

Qe[gpm] = Qn x

Qe[lpm] = Qn x

MW [lb / gal]8.33 lb / gal

MW [lkg / m3]998.2 kg / m3

Page 56: Nov mud motor handbook

Motor Handbook, 7th Edition

48

SIZE(inches)

SOCKETSIZE

in (mm)

NOZZLETYPE

NOZZLECARRIERTORQUElb-ft (N-m)

2 7/8 1 1/16 (27) Reed 371748 100 (140)

3 3/8 1 1/16 (27) Reed 371748 100 (140)

3 3/4 1 3/16 (30) Reed 371748 200 (270)

4 3/4 1 1/2 (38) Dresser 16527-xx 300 (410)

6 1/4 1 5/8 (41) Dresser 90021-28 600 (800)

6 3/4 1 5/8 (41) Dresser 90021-28 600 (800)

7 3/4 1 5/8 (41) Dresser 90021-28 600 (800)

9 5/8 1 5/8 (41) Dresser 90021-28 600 (800)

11 1/4 1 5/8 (41) Dresser 90021-28 600 (800)

Table 9: Nozzle Torque Values

Qn2 x MW

10858 x ∆P0

An = [in2]

4 x An

pNozzle Size (32nd inch) = x 32

Qe = Qn x = 280 gpm xMW [lb / gal]

8.3304 lb / gal11lb / gal]

8.33 lb / galQe = 322 gpm

Qn2 x MW

10858 x ∆P0An = = = .575 in2

To calculate nozzle size directly 1. Find the required nozzle flow rate using previous steps 1 and 2. 2. Calculate nozzle flow area from the following equation:

3. Find the nozzle size by rounding down the result of the following:

ExampleA total flow of 600 gpm is desired using a 6 1/4” 7/8 2.8 stage motor at a differential operating pressure of 240 psi. The desired speed is 100 RPM and the mud weight is 11 lb/gal (11 ppg).

The motor performance chart for the above motor shows that 320 gpm is required to turn the motor at 100 RPM and 240 psi. Subtracting this 320 gpm motor flow rate from the 600 gpm total flow rate gives a required nozzle flow rate of 280 gpm.

Adjusting this nozzle flow rate for 11 ppg mud gives an equivalent nozzle flow rate (Qe) of:

The above chart indicates that a 26/32 nozzle is required to bypass 322 gpm of water which is equivalent to an 11 ppg mud flow rate of 280 gpm at 240 psi.

A direct calculation yields:

Rounding down to the nearest nozzle size yields a 26/32 nozzle.

2802 x 1110858 x 240

4 x An

pNozzle Size (/32 in) = x 32 = x 32 = 27.44 x .575

p

Page 57: Nov mud motor handbook

49

POWER SECTION

LOCK HOUSINGTONG AREA

TONG AREA

ADJUSTING RING

POWER SECTION

LOCK HOUSING

ADJUSTING RING

OFFSET HOUSING

POWER SECTION

LOCK HOUSING

ADJUSTING RING

OFFSET HOUSING

Apply thread dope to this face before retorquing

OFFSET HOUSING

7. Adjustable Assembly Operating Instructions

2°, 3° and 4° Adjustable Housings

Figure 1 •Break joint with tongs on tong areas shown.

•Keep Adjusting Ring engaged with Offset Housing and back off Lock Housing 2 turns.

Note: Teeth must stay engaged during theback off procedure. If ring rotates whiledisengaged from teeth, reset the adjustingring position as detailed on page 50.

Figure 2 •Slide the Adjusting Ring up to disengage teeth.

•To adjust bend angle, rotate adjusting ring until the required angle marked on the adjusting ring and offset housing match.

Figure 3 •Engage teeth of Adjusting Ring at chosen angle setting. Apply thread dope to mating faces of the Lock Housing and Adjusting Ring. Matched number indicates angle of bend and exact short side of motor.

•Make up Lock Housing to recommended value listed in Table 10 or Table 11.

Warning: Do not rotate counterclockwise beyond the0° setting. This can lead to connection make upissues and potential downhole back-off.

Determining High Side for 2°, 3°, and 4° adjustable assembliesWhen the adjustable assembly is set at a bend angle, the motor high side(short side) is aligned with the matched angle markings.

Adjustable Assembly Operating Instructions

Page 58: Nov mud motor handbook

Motor Handbook, 7th Edition

50

2.38° Adjustable HousingThe 2.38° Adjustable Housing bend setting is set in the same way as the 2°, 3°, and 4° housings, however, instead of teeth, there are pins and slots which must be aligned. The bend setting is shown by aligning the ‘BEND’ line on the adjusting ring with the desired angle line on the offset housing.

Determining High Side

For whatever bend setting the assembly is set at, the motor high side (short side) is indicated by the corresponding mark on the Adjusting Ring.

Reset Adjusting Ring PositionIf the Adjusting Ring teeth are not kept engaged and the ring is allowed to rotate when backing off the Lock housing, the internal Splined Mandrel will back off. This can also occur if the Adjusting Ring is rotated counterclockwise beyond the 0° bend setting. If the Splined Mandrel backs off too far, the Lock Housing will bottom out on the splines when making up this connection. Because of this, the connection is not properly preloaded, which can lead to the Lock Housing or Splined Mandrel backing off down hole. In extreme cases, it is possible that the teeth can be sheared off when trying to torque up the connection.

In the event that the adjusting ring disengages from the offset housing and rotates counterclockwise beyond the 0° bend setting, the procedure outlined below should be followed to reset the adjusting ring to the proper position prior to setting the bend angle:

1. To ensure enough clearance to complete the following steps, engage the adjusting ring and back off only the lock housing 2 additional turns.

2. Slide the adjusting ring up until teeth disengage from the offset housing.

3. Screw the adjusting ring (and the splined mandrel) clockwise into the offset housing until the splined mandrel bottoms out & stops. If teeth engage while screwing in splined mandrel, repeat steps 1 and 2.

4. Back off 2 turns (counterclockwise rotation).

5. Rotate the adjusting ring clockwise to the “0.00” position.

The adjustable housing is now reset and can be set to the desired bendangle as indicated in the previous pages.

Figure 9: 2.38° Adjusting Ring

Page 59: Nov mud motor handbook

51

Motor Size Torque (lb-ft) (N-m)

2 7/8” 4,000 5,400

3 1/8” 4,500 6,100

3 3/4” 5,300 7,200

4 3/4” 11,300 15,000

6 1/4” 23,000 31,000

6 3/4” 28,000 38,000

7 3/4” 43,000 58,000

9 5/8” 68,000 92,000

11 1/4” 80,000 108,000

Motor Size Torque (lb-ft) (N-m)

5” (2.38° only) 11,000 15,000

5” (3° only) 14,000 19,000

6 1/2” 26,000 35,000

7” 28,000 38,000

8” 50,000 68,000

9 5/8” 68,000 92,000

2 Degree 3 Degree 4 Degree 2.38 Degree0.00 0.00 0.00 0.00

0.26 0.39 0.35 0.39

0.52 0.78 0.69 0.78

0.77 1.15 1.04 1.15

1.00 1.50 1.37 1.50

1.22 1.83 1.69 1.83

1.41 2.12 2.00 2.12

1.59 2.38 2.29 2.25

1.73 2.60 2.57 2.38

1.85 2.77 2.83

1.93 2.89 3.06

1.98 2.97 3.28

2.00 3.00 3.46

3.63

3.76

3.86

3.94

3.98

4.00

Lock Housing Make-up Torques

Table 10: 2°, 3° and 4° Conventional Lock Housing Make-up Torque

Table 11: 2.38° and 3° HEMIDRIL-rated Lock Housing Make-up Torque

Table 12: Adjustable Housing Bend Settings

The following table shows the available bend settings for the 2°, 2.38°,3°, and 4° adjustable housings.

Adjustable Assembly Operating Instructions

Page 60: Nov mud motor handbook

Motor Handbook, 7th Edition

52

TONGHERE

TONGHERE

ADAPTERHOUSING

KICK RING

APPROX2 TURNS

MANDREL HEAD

.50

ADAPTERHOUSING

KICK RING

ROTATE

KICK SUB

CLEAN AND REDOPE

HOLD

CLEAN AND REDOPE

TONGHERE

TONGHERE

Legacy Black Max™ AdjustableHousing Setting ProcedureAdjustable Housing Setting Procedure from Black Max Motor Handbook, Jan 2006, Page 76-77

Tong as shown tobreak.

While holding kick ring up, back off mandrelhead ring 2 full turns.

While lifting on adapterhousing, slide kick ringdown.

Torque mandrel head to required torque.

Rotate kick sub to reqkick. Align marks asshown.

Re-engage kick ring.While holding kick ringin place, chain tongmandrel head.

Page 61: Nov mud motor handbook

53

Table 13: Black Max™ Adjustable Make-up Torque

Determining High Side for legacy Black Max™ adjustable assemblies

When the adjustable assembly is set at a bend angle, the motor high side (short side) is aligned with the matched angle markings.

CAUTION!

1. Whenever backing off mandrel head, or making up mandrel head to proper torque, always pull on tongs that are on mandrel head.

2. Make sure teeth are in alignment and fully engaged before mandrel head is torqued.

3. Ensure all shoulder faces are free from dirt/debris and dope all exposed threads and faces before making up.

DO NOT ROTATE OVER 1.50° ACTUAL

Motor Size Mandrel Head Torque (lb-ft) (N-m)

3 1/8” 2,000 2,700

3 1/2” 3,500 4,700

3 3/4” 3,500 4,700

5” 12,000 16,000

5 1/2” 13,000 18,000

6 1/2” 22,000 30,000

6 3/4” 22,000 30,000

8” 40,000 54,000

9 5/8” 60,000 81,000

11 1/4” 75,000 102,000

Adjustable Assembly Operating Instructions

Page 62: Nov mud motor handbook

Motor Handbook, 7th Edition

54

Sudden Pressure Increase • his may occur when the motor stalls. See Stalling on page 28 for instructions on how to correct this problem.

•The tool may be plugged internally, or the bit plugged requiring a trip out of the hole for bit or motor replacement.

•The bearing assembly may be seized. Test motor at surface.

Low / No Penetration •This may occur due to a worn bit, requiring a bit trip.

•Formation changes may require changes in bit weight and circulation rates.

•The stabilizer may be hanging up on the formation.

•The bit may be balled up requiring a different bit for the formation.

•The stator elastomer liner may be damaged requiring a trip out of the hole and motor replacement.

Slow Pressure Decrease •This may result from a wash out in the drill string or the dump sub.

•Lost circulation causes a decrease in pressure if there is no return and may be confirmed by checking the pit level.

•A gas kick causes a decrease in pressure and may be detected by an increase in ROP and confirmed by checking the pit level.

Sudden Pressure Decrease •This may result from a backoff in the drill string or on the motor. Penetration will cease.

•This may indicate fracture of the driveshaft assembly within the motor. Test motor at surface.

Bit Box Does Not Spin While Circulating •If flow comes out the bit, but it does not spin while circulating (i.e. during surface test), this may be an indication of a backed-off connection or fracture of the driveshaft assembly within the motor.

Bit Box Does Not Spin, Minimal Flow When Circulating •If minimal flow comes out the bit, and it does not spin while circulating (i.e. during surface test), this may be an indication of a seized bearing assembly or damaged stator elastomer liner.

•May also be an indication of partial plugging within the BHA

8. Troubleshooting

Page 63: Nov mud motor handbook

55

SECTION IV:MOTOR PERFORMANCE

DATA

Page 64: Nov mud motor handbook
Page 65: Nov mud motor handbook

57

9. Motor Performance SummaryThe following tables list the available motor configurations. These tables can be used to compare different bearing assembly options that can be run with power sections listed in Section 10.

Motor Performance SummaryThe Motor Performance Summary table lists the Maximum Flow Rates, Max Bit Speed, Rev/Unit Volume, and Max Differential Pressure and Torque for Standard and PowerPLUS power sections. These values can also be found on the individual power section spec pages and are listed here for quick reference and comparison.

Weight on Bit LimitsThe Weight on Bit Limits Table lists the maximum recommended continuous weight on bit (WOB) that can be applied while drilling to a particular bearing assembly. WOB is dependent on the rotational speed of the motor. Increasing RPM of the motor reduces the maximum recommended WOB. WOB values are provided at 100, 200 & 300 RPM. Using a higher WOB reduces the expected life of the bearings, therefore always using the minimum WOB required for the application.

Motor Comparison TablesPerformance curves in Section 10 are provided only for the latest design of sealed bearing assembly for each power section. Using the Motor Comparison Tables values, a comparison can be made to approximate build rates for and curve data for other motors.

•Bit to Bend: The distance from the end of the bit to the middle of the bend on the adjustable housing.

•Pull to Re-run: The maximum recommended tensile load allowed for a motor before damage to the internal bearings occurs.

•Pull to Yield: The tensile load required to yield the weakest part of the motor. Pulling beyond this load will damage the motor. The motor should not be run again.

Values are for reference only. NOV does not guarantee that damage will not occur to the motor assembly at or below the recommended WOB and Pull values because many other factors can affect these values.

Motor Performance Data

Page 66: Nov mud motor handbook

Motor Handbook, 7th Edition

58

Size Lobes Stages Maximum Flow Rate

Maximum Bit Speed

Rev / Unit Volume

(gpm) (lpm) (RPM) (rev/gal) (rev/L)

Coiled Tubing Power Sections1 11/16” 5/6 5.0 45 170 582 12.9 3.42 1/8” 5/6 6.0 50 190 515 11.3 2.72 7/8” 5/6 3.5 120 450 372 3.10 0.822 7/8” 5/6 4.7 125 470 470 3.76 0.992 7/8” 5/6 7.0 80 300 422 5.28 1.393 1/8” 7/8 3.0 140 530 252 1.80 0.48

Monoflo Power Sections3 3/8” 4/5 5.0 120 450 408 3.40 0.903 3/8” 7/8 3.0 120 450 188 1.56 0.413 3/4” 4/5 3.5 160 610 250 1.56 0.413 3/4” 5/6 5.0 160 610 242 1.51 0.403 3/4” 6/7 3.0 200 760 160 0.80 0.213 3/4” 7/8 2.0 160 610 89 0.56 0.153 3/4” 7/8 2.3 160 610 122 0.76 0.204 3/4” 2/3 8.0 260 980 516 1.99 0.534 3/4” 4/5 3.5 250 950 267 1.07 0.284 3/4” 4/5 6.0 250 950 253 1.01 0.274 3/4” 4/5 6.3 250 950 253 1.01 0.274 3/4” 5/6 8.3 300 1,140 326 1.09 0.294 3/4” 7/8 2.0 250 950 80 0.32 0.084 3/4” 7/8 2.2 250 950 137 0.55 0.154 3/4” 7/8 2.6 300 1,140 79 0.27 0.074 3/4” 7/8 2.9 250 950 83 0.33 0.094 3/4” 7/8 3.8 250 950 131 0.52 0.145” 6/7 6.0 350 1,320 303 0.87 0.235” 6/7 7.0 350 1,320 302 0.86 0.235” 6/7 8.0 350 1,320 302 0.86 0.236 1/4” 4/5 7.5 400 1,510 276 0.69 0.186 1/4” 5/6 5.5 500 1,890 232 0.46 0.126 1/4” 7/8 2.8 400 1,510 131 0.33 0.096 1/4” 7/8 2.9 500 1,890 82 0.16 0.046 1/4” 7/8 4.8 400 1,510 131 0.33 0.096 1/2” 1/2 4.0 500 1,890 535 1.07 0.286 1/2” 8/9 4.0 500 1,890 145 0.29 0.086 3/4” 2/3 7.0 600 2,270 510 0.85 0.226 3/4” 4/5 4.8 600 2,270 304 0.51 0.136 3/4” 4/5 7.0 600 2,270 311 0.52 0.146 3/4” 5/6 6.8 600 2,270 246 0.41 0.116 3/4” 6/7 5.0 600 2,270 186 0.31 0.086 3/4” 6/7 6.0 600 2,270 186 0.31 0.086 3/4” 7/8 2.0 500 1,890 87 0.17 0.046 3/4” 7/8 2.9 500 1,890 84 0.17 0.046 3/4” 7/8 3.0 600 2,270 172 0.29 0.086 3/4” 7/8 5.0 600 2,270 174 0.29 0.086 3/4” 7/8 5.7 600 2,270 150 0.25 0.07

Motor Performance Summary

Page 67: Nov mud motor handbook

59

Standard Max Differential Pressure

Torque @ Max Pressure

PowerPLUS Max Differential

Pressure

PowerPLUS Torque @ Max

Pressure(psi) (kPa) (lb-ft) (N-m) (psi) (kPa) (lb-ft) (N-m)

730 5,030 122 170 1,100 7,580 180 240870 6,000 184 250 1,310 9,030 280 380505 3,480 315 430 760 5,240 470 640680 4,690 431 580 1,020 7,030 650 880

1,020 7,030 516 700 1,530 10,550 770 1,040460 3,170 660 890 690 4,760 990 1,340

750 5,170 570 770 1,130 7,790 860 1,170460 3,170 782 1,060 690 4,760 1,170 1,590520 3,590 918 1,240 780 5,380 1,380 1,870725 5,000 1,055 1,430 1,090 7,520 1,580 2,140440 3,030 1,314 1,780 660 4,550 1,970 2,670295 2,030 1,311 1,780 440 3,030 1,970 2,670350 2,410 1,124 1,520 530 3,650 1,690 2,290

1,135 7,830 1,428 1,940 1,700 11,720 2,140 2,900520 3,590 1,218 1,650 780 5,380 1,830 2,480840 5,790 2,011 2,730 1,260 8,690 3,020 4,090955 6,580 2,286 3,100 1,430 9,860 3,430 4,650

1,190 8,200 3,207 4,350 1,790 12,340 4,810 6,520280 1,930 1,806 2,450 420 2,900 2,710 3,670335 2,310 1,479 2,010 500 3,450 2,220 3,010390 2,690 3,500 4,750 590 4,070 5,250 7,120405 2,790 2,791 3,780 610 4,210 4,190 5,680535 3,690 2,332 3,160 800 5,520 3,500 4,750860 5,930 2,372 3,220 1,290 8,890 3,560 4,830

1,005 6,930 2,895 3,930 1,510 10,410 4,340 5,8801,215 8,380 3,500 4,750 1,820 12,550 5,250 7,1201,070 7,380 4,065 5,510 1,610 11,100 6,100 8,270800 5,520 4,675 6,340 1,200 8,270 7,010 9,500425 2,930 2,784 3,770 640 4,410 4,180 5,670425 2,930 6,277 8,510 640 4,410 9,420 12,770700 4,830 4,773 6,470 1,050 7,240 7,160 9,710480 3,310 1,296 1,760 720 4,960 1,940 2,630605 4,170 4,674 6,340 910 6,270 7,010 9,500945 6,520 2,933 3,980 1,420 9,790 4,400 5,970695 4,790 3,394 4,600 1,040 7,170 5,090 6,900

1,015 7,000 4,820 6,540 1,520 10,480 7,230 9,800970 6,690 6,039 8,190 1,460 10,070 9,060 12,280715 4,930 5,699 7,730 1,070 7,380 8,550 11,590925 6,380 7,708 10,450 1,390 9,580 11,560 15,670280 1,930 4,051 5,490 420 2,900 6,080 8,240425 2,930 6,135 8,320 640 4,410 9,200 12,470460 3,170 3,830 5,190 690 4,760 5,750 7,800720 4,960 5,972 8,100 1,080 7,450 8,960 12,150845 5,830 8,204 11,120 1,270 8,760 12,310 16,690

Motor Performance Data

Page 68: Nov mud motor handbook

Motor Handbook, 7th Edition

60

Size Lobes Stages Maximum Flow Rate

Maximum Bit Speed

Rev / Unit Volume

(gpm) (lpm) (RPM) (rev/gal) (rev/L)

Monoflo Power Sections (continued)

6 3/4” 7/8 6.4 600 2,270 183 0.31 0.086 3/4” 8/9 3.0 500 1,890 150 0.30 0.087” 2/3 8.3 600 2,270 939 1.57 0.417” 7/8 6.0 600 2,270 199 0.33 0.097” 7/8 7.5 600 2,270 186 0.31 0.087 3/4” 4/5 3.6 900 3,410 226 0.25 0.077 3/4” 4/5 5.3 900 3,410 230 0.26 0.077 3/4” 5/6 5.0 900 3,410 257 0.29 0.087 3/4” 6/7 4.0 900 3,410 159 0.18 0.057 3/4” 7/8 2.0 900 3,410 106 0.12 0.037 3/4” 7/8 3.0 900 3,410 152 0.17 0.047 3/4” 7/8 4.0 900 3,410 149 0.17 0.048” 5/6 3.0 900 3,410 279 0.31 0.088” 6/7 5.0 900 3,410 159 0.18 0.059 5/8” 2/3 7.5 1,200 4,540 590 0.49 0.139 5/8” 3/4 4.5 1,200 4,540 260 0.22 0.069 5/8” 3/4 6.0 1,200 4,540 251 0.21 0.069 5/8” 5/6 3.0 1,200 4,540 133 0.11 0.039 5/8” 5/6 4.0 1,200 4,540 132 0.11 0.039 5/8” 6/7 5.0 1,200 4,540 156 0.13 0.039 5/8” 6/7 6.0 1,200 4,540 155 0.13 0.0311 1/4” 3/4 3.6 1,500 5,680 179 0.12 0.0311 1/4” 6/7 5.5 1,800 6,810 162 0.09 0.0211 1/4” 6/7 5.6 1,800 6,810 162 0.09 0.02

HEMIDRIL Power Sections

2 7/8” 5/6 3.5 120 450 400 3.33 0.885” 4/5 6.3 250 950 245 0.98 0.265” 7/8 3.8 250 950 130 0.52 0.146 1/4” 7/8 2.9 500 1,890 85 0.17 0.046 1/4” 7/8 4.8 400 1,510 136 0.34 0.096 7/8” 7/8 2.9 600 2,270 102 0.17 0.046 7/8” 7/8 3.0 600 2,270 180 0.30 0.086 7/8” 7/8 5.0 600 2,270 180 0.30 0.088” 7/8 4.0 900 3,410 153 0.17 0.049 5/8” 7/8 4.8 1,200 4,540 132 0.11 0.0311 1/4” 7/8 4.8 1,200 4,540 132 0.11 0.03

Page 69: Nov mud motor handbook

61

Standard Max Differential Pressure

Torque @ Max Pressure

PowerPLUS Max Differential

Pressure

PowerPLUS Torque @ Max

Pressure(psi) (kPa) (lb-ft) (N-m) (psi) (kPa) (lb-ft) (N-m)

995 6,860 7,580 10,280 1,490 10,270 11,370 15,420455 3,140 4,418 5,990 680 4,690 6,630 8,990

1,135 7,830 1,881 2,550 1,700 11,720 2,820 3,820885 6,100 6,437 8,730 1,330 9,170 9,660 13,100

1,120 7,720 8,508 11,540 1,680 11,580 12,760 17,300520 3,590 5,106 6,920 780 5,380 7,660 10,390750 5,170 7,029 9,530 1,130 7,790 10,540 14,290700 4,830 5,529 7,500 1,050 7,240 8,290 11,240565 3,900 7,783 10,550 850 5,860 11,670 15,820295 2,030 6,055 8,210 440 3,030 9,080 12,310460 3,170 6,604 8,950 690 4,760 9,910 13,440570 3,930 8,333 11,300 860 5,930 12,500 16,950435 3,000 3,436 4,660 650 4,480 5,150 6,980715 4,930 9,618 13,040 1,070 7,380 14,430 19,560

1,040 7,170 5,853 7,940 1,560 10,760 8,780 11,900615 4,240 7,184 9,740 920 6,340 10,780 14,620830 5,720 8,849 12,000 1,250 8,620 13,270 17,990410 2,830 8,988 12,190 620 4,270 13,480 18,280555 3,830 11,865 16,090 830 5,720 17,800 24,130715 4,930 12,881 17,460 1,070 7,380 19,320 26,190880 6,070 15,775 21,390 1,320 9,100 23,660 32,080505 3,480 12,174 16,510 760 5,240 18,260 24,760820 5,650 19,368 26,260 1,230 8,480 29,050 39,390820 5,650 19,377 26,270 1,230 8,480 29,070 39,410

885 6,100 644 8701,435 9,890 3,830 5,190865 5,960 4,480 6,070660 4,550 9,750 13,220

1,090 7,520 8,450 11,460900 6,210 12,955 17,560685 4,720 6,510 8,830

1,140 7,860 10,830 14,680910 6,270 15,155 20,550

1,090 7,520 26,160 35,4701,090 7,520 26,160 35,470

Motor Performance Data

Page 70: Nov mud motor handbook

Motor Handbook, 7th Edition

62

Size Model SeriesMax WOB @

100 RPMMax WOB @

200 RPMMax WOB @

300 RPM(lbf) (lbf) (lbf)

169 Black Max™ 2,200 1,800 1,600

213 ST1 17 12,000 10,000 8,000

238 ST1 17 12,000 10,000 9,000

238 SR1 20 13,000 11,000 10,000

287 ST1 14 22,000 18,000 16,000

287 ST1 17 22,000 18,000 16,000

287 SR1 20 23,000 19,000 17,000

287 ST2H 24XH 22,000 18,000 16,000

313 ST2 24X 21,000 17,000 15,000

350 ST1 14 25,000 20,000 18,000

350 SR1 20 25,000 20,000 18,000

375 ST1 17 29,000 24,000 21,000

375 SR1 20 29,000 24,000 21,000

375 ST2 24 29,000 24,000 21,000

475 SR1 20 54,000 44,000 39,000

475 ST2 24 53,000 43,000 38,000

475 ST2 24X 53,000 43,000 38,000

475 ST2H 24XH 53,000 43,000 38,000

500 ST3 36 53,000 43,000 38,000

500 SR3 39 58,000 47,000 42,000

500 ML3 40 87,000 69,000 60,000

625 ST2 24 76,000 62,000 55,000

625 ST2 24X 76,000 62,000 55,000

625 ST2H 24XH 76,000 62,000 55,000

650 ST3 36 90,000 73,000 65,000

650 ML3 40 115,000 92,000 80,000

675 ST2 24 98,000 80,000 71,000

675 ST2 24X 98,000 80,000 71,000

675 ST2H 24XH 98,000 80,000 71,000

675 ST3 36 98,000 80,000 71,000

675 SR3 39 103,000 84,000 74,000

700 ML3 40 144,000 114,000 100,000

775 ST1 17 127,000 103,000 91,000

775 ST2 24 127,000 103,000 91,000

800 ST2 24 127,000 103,000 91,000

800 ST3 36 128,000 104,000 92,000

800 ML3 40 187,000 149,000 130,000

962 ST1 17 213,000 173,000 154,000

962 ST2 24X 213,000 173,000 154,000

962 ST2H 24XH 213,000 173,000 154,000

962 ST3 36 213,000 173,000 154,000

962 ML3 40 325,000 258,000 225,000

1125 ST2H 24 216,000 176,000 156,000

Weight on Bit Limits – ImperialBold sizes are used with Motor Performance Data in Section 10.

Page 71: Nov mud motor handbook

63

Size Model SeriesMax WOB @

100 RPMMax WOB @

200 RPMMax WOB @

300 RPM(daN) (daN) (daN)

169 Black Max™ 1,000 800 700

213 ST1 17 5,300 4,400 3,600

238 ST1 17 5,300 4,400 4,000

238 SR1 20 5,800 4,900 4,400

287 ST1 14 9,800 8,000 7,100

287 ST1 17 9,800 8,000 7,100

287 SR1 20 10,200 8,500 7,600

287 ST2H 24XH 9,800 8,000 7,100

313 ST2 24X 9,300 7,600 6,700

350 ST1 14 11,100 8,900 8,000

350 SR1 20 11,100 8,900 8,000

375 ST1 17 12,900 10,700 9,300

375 SR1 20 12,900 10,700 9,300

375 ST2 24 12,900 10,700 9,300

475 SR1 20 24,000 19,600 17,300

475 ST2 24 23,600 19,100 16,900

475 ST2 24X 23,600 19,100 16,900

475 ST2H 24XH 23,600 19,100 16,900

500 ST3 36 23,600 19,100 16,900

500 SR3 39 25,800 20,900 18,700

500 ML3 40 38,700 30,700 26,700

625 ST2 24 33,800 27,600 24,500

625 ST2 24X 33,800 27,600 24,500

625 ST2H 24XH 33,800 27,600 24,500

650 ST3 36 40,000 32,500 28,900

650 ML3 40 51,200 40,900 35,600

675 ST2 24 43,600 35,600 31,600

675 ST2 24X 43,600 35,600 31,600

675 ST2H 24XH 43,600 35,600 31,600

675 ST3 36 43,600 35,600 31,600

675 SR3 39 45,800 37,400 32,900

700 ML3 40 64,100 50,700 44,500

775 ST1 17 56,500 45,800 40,500

775 ST2 24 56,500 45,800 40,500

800 ST2 24 56,500 45,800 40,500

800 ST3 36 56,900 46,300 40,900

800 ML3 40 83,200 66,300 57,800

962 ST1 17 94,700 77,000 68,500

962 ST2 24 94,700 77,000 68,500

962 ST2H 24XH 94,700 77,000 68,500

962 ST3 36 94,700 77,000 68,500

962 ML3 40 144,600 114,800 100,100

1125 ST2H 24 96,100 78,300 69,400

Motor Performance Data

Weight on Bit Limits – MetricBold sizes are used with Motor Performance Data in Section 10.

Page 72: Nov mud motor handbook

Motor Handbook, 7th Edition

64

Size Model SeriesBit toBend

Pull to Re-Run

Pull to Yield

(in) (lbf) (lbf)

169 Black Max™ N/A 6,000 28,000

213 ST1 17 N/A 19,000 61,000

238 ST1 17 N/A 22,000 81,000

238 SR1 20 N/A 22,000 24,000

287 ST1 14 N/A 47,000 137,000

287 ST1 17 N/A 45,000 130,000

287 SR1 20 N/A 50,000 137,000

287 ST2H 24XH N/A 47,000 137,000

313 ST2 24X N/A 57,000 179,000

350 ST1 14 55.7 60,000 221,000

350 SR1 20 31.9 60,000 172,000

375 ST1 17 47.2 75,000 233,000

375 SR1 20 36.6 75,000 174,000

375 ST2 24 48.5 75,000 238,000

475 SR1 20 44.5 108,000 331,000

475 ST2 24 61.5 144,000 403,000

475 ST2 24X 65.5 144,000 403,000

475 ST2H 24XH 65.5 144,000 403,000

500 ST3 36 61.2 144,000 325,000

500 SR3 39 46.2 184,000 325,000

500 ML3 40 66.2 159,000 432,000

625 ST2 24 75.3 215,000 515,000

625 ST2 24X 79.3 215,000 515,000

625 ST2H 24XH 79.3 215,000 515,000

650 ST3 36 77.1 263,000 593,000

650 ML3 40 77.9 254,000 644,000

675 ST2 24 75.2 277,000 618,000

675 ST2 24X 79.2 277,000 618,000

675 ST2H 24XH 78.8 277,000 618,000

675 ST3 36 76.1 277,000 549,000

675 SR3 39 58.2 341,000 618,000

700 ML3 40 79.5 305,000 599,000

775 ST1 17 74.9 349,000 718,000

775 ST2 24 80.3 349,000 718,000

800 ST2 24 80.4 349,000 718,000

800 ST3 36 86.8 367,000 792,000

800 ML3 40 90.6 434,000 792,000

962 ST1 17 90.0 581,000 1,186,000

962 ST2 24X 92.7 581,000 1,186,000

962 ST2H 24XH 99.0 581,000 1,186,000

962 ST3 36 97.9 581,000 1,186,000

962 ML3 40 107.0 692,000 1,873,000

1125 ST2H 24 109.8 906,000 1,610,000

Motor Comparison Tables – ImperialBold sizes are used with Motor Performance Data in Section 10.

Page 73: Nov mud motor handbook

65

Size Model SeriesBit to Bend

Pull to Re-run

Pull to Yield

(m) (daN) (daN)

169 Black Max™ N/A 3,000 12,000

213 ST1 17 N/A 8,000 27,000

238 ST1 17 N/A 10,000 36,000

238 SR1 20 N/A 10,000 11,000

287 ST1 14 N/A 21,000 61,000

287 ST1 17 N/A 20,000 58,000

287 SR1 20 N/A 22,000 61,000

287 ST2H 24XH N/A 21,000 61,000

313 ST2 24X N/A 25,000 80,000

350 ST1 14 1.41 27,000 98,000

350 SR1 20 0.81 27,000 77,000

375 ST1 17 1.20 33,000 104,000

375 SR1 20 0.93 33,000 77,000

375 ST2 24 1.23 33,000 106,000

475 SR1 20 1.13 48,000 147,000

475 ST2 24 1.56 64,000 179,000

475 ST2 24X 1.66 64,000 179,000

475 ST2H 24XH 1.66 64,000 179,000

500 ST3 36 1.55 64,000 145,000

500 SR3 39 1.17 82,000 145,000

500 ML3 40 1.68 71,000 192,000

625 ST2 24 1.91 96,000 229,000

625 ST2 24X 2.01 96,000 229,000

625 ST2H 24XH 2.01 96,000 229,000

650 ST3 36 1.96 117,000 264,000

650 ML3 40 1.98 113,000 286,000

675 ST2 24 1.91 123,000 275,000

675 ST2 24X 2.01 123,000 275,000

675 ST2H 24XH 2.00 123,000 275,000

675 ST3 36 1.93 123,000 244,000

675 SR3 39 1.48 152,000 275,000

700 ML3 40 2.02 136,000 266,000

775 ST1 17 1.90 155,000 319,000

775 ST2 24 2.04 155,000 319,000

800 ST2 24 2.04 155,000 319,000

800 ST3 36 2.20 163,000 352,000

800 ML3 40 2.30 193,000 352,000

962 ST1 17 2.29 258,000 528,000

962 ST2 24 2.36 258,000 528,000

962 ST2H 24XH 2.51 258,000 528,000

962 ST3 36 2.49 258,000 528,000

962 ML3 40 2.72 308,000 833,000

1125 ST2H 24 2.79 403,000 716,000

Motor Performance Data

Motor Comparison Tables – MetricBold sizes are used with Motor Performance Data in Section 10.

Page 74: Nov mud motor handbook

Motor Handbook, 7th Edition

66

Power Section Page Power Section Page3 3/8” 4/5 5.0 Stage 78 6 3/4” 6/7 5.0 Stage 1463 3/8” 7/8 3.0 Stage 80 6 3/4” 6/7 6.0 Stage 1483 3/4” 4/5 3.5 Stage 82 6 3/4” 7/8 2.0 Stage 1503 3/4” 5/6 5.0 Stage 84 6 3/4” 7/8 2.9 Stage 1523 3/4” 6/7 3.0 Stage 86 6 3/4” 7/8 3.0 Stage 1543 3/4” 7/8 2.0 Stage 88 6 3/4” 7/8 3.0 Stage SR3 1563 3/4” 7/8 2.3 Stage 90 6 3/4” 7/8 5.0 Stage 1584 3/4” 2/3 8.0 Stage 92 6 3/4” 7/8 5.0 Stage SR3 1604 3/4” 4/5 3.5 Stage 94 6 3/4” 7/8 5.7 Stage 1624 3/4” 4/5 6.0 Stage 96 6 3/4” 7/8 6.4 Stage 1644 3/4” 4/5 6.3 Stage 98 6 3/4” 8/9 3.0 Stage 1664 3/4” 5/6 8.3 Stage 100 7” 2/3 8.3 Stage 1684 3/4” 7/8 2.0 Stage 102 7” 7/8 6.0 Stage 1704 3/4” 7/8 2.0 Stage SR3 104 7” 7/8 7.5 Stage 1724 3/4” 7/8 2.2 Stage 106 7 3/4” 4/5 3.6 Stage 1744 3/4” 7/8 2.2 Stage SR3 108 7 3/4” 4/5 5.3 Stage 1764 3/4” 7/8 2.6 Stage 110 7 3/4” 5/6 5.0 Stage 1784 3/4” 7/8 2.9 Stage 112 7 3/4” 6/7 4.0 Stage 1804 3/4” 7/8 3.8 Stage 114 7 3/4” 7/8 2.0 Stage 1824 3/4” 7/8 3.8 Stage SR3 116 7 3/4” 7/8 3.0 Stage 1845” 6/7 6.0 Stage 118 7 3/4” 7/8 4.0 Stage 1865” 6/7 7.0 Stage 120 8” 5/6 3.0 Stage 1885” 6/7 8.0 Stage 122 8” 6/7 5.0 Stage 1906 1/4” 4/5 7.5 Stage 124 9 5/8” 2/3 7.5 Stage 1926 1/4” 5/6 5.5 Stage 126 9 5/8” 3/4 4.5 Stage 1946 1/4” 7/8 2.8 Stage 128 9 5/8” 3/4 6.0 Stage 1966 1/4” 7/8 2.9 Stage 130 9 5/8” 5/6 3.0 Stage 1986 1/4” 7/8 4.8 Stage 132 9 5/8” 5/6 4.0 Stage 2006 1/2” 1/2 4.0 Stage 134 9 5/8” 6/7 5.0 Stage 2026 1/2” 8/9 4.0 Stage 136 9 5/8” 6/7 6.0 Stage 2046 3/4” 2/3 7.0 Stage 138 11 1/4” 3/4 3.6 Stage 2066 3/4” 4/5 4.8 Stage 140 11 1/4” 6/7 5.5 Stage 2086 3/4” 4/5 7.0 Stage 142 11 1/4” 6/7 5.6 Stage 2106 3/4” 5/6 6.8 Stage 144

HEMIDRIL Power SectionsPower Section Page Power Section Page

2 7/8" 5/6 3.5 Stage CT 212 6 7/8" 7/8 3.0 Stage 2265" 4/5 6.3 Stage 214 6 7/8" 7/8 3.0 Stage SR3 2285" 7/8 3.8 Stage 216 6 7/8" 7/8 5.0 Stage 2305” 7/8 3.8 Stage SR3 218 8" 7/8 4.0 Stage 2326 1/4" 7/8 2.9 Stage 220 9 5/8" 7/8 4.8 Stage 2346 1/4" 7/8 4.8 Stage 222 11 1/4" 7/8 4.8 Stage 2366 7/8" 7/8 2.9 Stage 224

Power Section Page Power Section Page1 11/16” 5/6 5.0 Stage CT 70 2 7/8” 5/6 4.7 Stage CT 742 1/8” 5/6 6.0 Stage CT 71 2 7/8” 5/6 7.0 Stage CT 752 7/8” 5/6 3.5 Stage CT 72 3 1/8” 7/8 3.0 Stage CT 762 7/8” 5/6 3.5 Stage CT HEMI 73

10. Motor Performance DataCoiled Tubing Power Sections

Monoflo Power Sections

Page 75: Nov mud motor handbook

67

Motor Performance Data

How to Use Spec PagesThe following pages contain the specifications and performance characteristics for NOV motors. Below is a description of the charts shown on these pages and comments on their use. As improvements are continuously being made, these specifications are subject to change without notice. All performance specifications are based on water at 70°F (21°C). Curves are generated using the latest generation of motor design available for that power section.

Motor DimensionsMotor dimensions given for a specific power section are for the latest generation sealed bearing assembly that is available to use. To find comparison values, please refer to the Motor Comparison Tables on pages 64 & 65.

Predicted Build RatesThis table shows the predicted build rates, in degrees/100ft (degrees/30m), at various adjustable housing bend settings and two or three common hole sizes. Three motor configurations are shown.

•SLICK - motors with no stabilization.

•SINGLE STABILIZER - Motors with a single stabilizer on the bearing housing. Stabilizers are considered 1/8” undergauge.

•TWO STABILIZERS - Motors with a stabilizer on the bearing housing as well as above the motor. Stabilizers are considered 1/8” undergauge. Using this configuration gives the most predictable build rates.

Many factors (e.g. weight on bit, formation type, BHA, bit type, etc.) affect the actual build rate achieved. These build rates should therefore only be used as a guideline. It should be noted that motors set with high adjustable bend settings may be difficult or impossible to run into a straight hole or may produce high side loads on the bit resulting in difficulty starting the motor.

Maximum Adjustable Bend Setting For Rotary DrillingThis table shows the maximum bend setting, in degrees, for continuous rotation of the drillstring at various hole curvatures. Maximum bend settings were calculated on a static bending stress fatigue analysis. Note that the practice of alternating between rotating and sliding through a curve will create micro-doglegs that are higher than what may be shown on a survey report.

Rotating with excessive bending loads for extended durations can cause fatigue housing fractures. Rotary speed should be decreased as necessarybased on local conditions. Recommendations for offset pads and other configurations can be supplied upon request. Note: NOV recommends a maximum bend setting of 1.83° for rotary drilling.

Recommended Operating LimitsThese values are the recommended limits for the power section:

•Flow Range – The acceptable flow range through the power section. If more flow is required below the motor assembly, a nozzle can be used to bypass flow. See Nozzle Selection on page 47.

•Revs per Unit Volume – The number of revolutions of the rotor per unit volume when no load is on the power section.

•Speed – The output speed range of the power section with no load. See performance curves to determine output speed while drilling.

•Approx Pressure Drop @ max flow – Pressure drop through motor when off bottom (no load).

Page 76: Nov mud motor handbook

Motor Handbook, 7th Edition

68

To calculate the total approximate pressure drop across the motor while drilling, add the Approximate Pressure Drop (No Load) to the expected Differential Operating Pressure. Please be advised that the values shown for Approximate Pressure Drop @ XXX gpm (No Load) are derived from test data of the motor power sections with water, plus an additional factor added to account for the other motor assemblies. These are useful primarily as a comparison between power sections, as the actual pressure drop across the complete motor will be affected by a number of factors such as power section fit, sub-assemblies used, downhole temperature, mud weight and viscosity, and flow rate. These values can be used to perform basic hydraulics calculations for well planning, but if critical to drilling performance, should be verified at the rig by surface testing. The suggested surface test would be to flow through the motor (no bit attached) at the desired flow rate, record the standpipe pressure (SPP), then subtract the calculated pressure loss of the surface equipment to determine the no-load pressure drop through the motor itself.

Performance OutputPerformance comparison between standard elastomer and PowerPLUS elastomer. Standard Elastomer and PowerPLUS produce the same flowrate at their respective max recommended pressure.

•Max Diff Pressure – The maximum recommended differential pressure for operating temperatures at or below 130°F (54°C). If operating temperatures are anticipated to be in excess of 130°F (54°C) refer to Figure 7: Max Pressure De-rating for Power Sections on page 39. Exceeding this value will significantly reduce the life of the stator.

•Torque @ Max Pressure – Output torque of the power section at max pressure. PowerPLUS power sections can handle 1.5x more pressure than standard elastomer and therefore can output 1.5x more torque.

Fit Information for All ElastomersThis table shows what fits are available for the particular power section. See Power Section Fits on page 33 for information on how to correctly use power section fit options.

Performance CurvesThe performance curve shown compares the output speed characteristics at high, mid and low flow rates for both a standard elastomer power section and the PowerPLUS elastomer version. Also shown is the output torque for the power section. Output torque is dependant only on pressure and power section profile so the same line is used for both elastomers.

•Differential Operating Pressure in psi (kPa for metric) is shown on the horizontal axis. This is the difference between the actual recorded on-bottom (with load) and off-bottom (no load) pressures.

•Motor Speed in RPM is shown on the left axis.

•Motor Torque in lb-ft (N-m) is shown on the right axis.

•Max Pressure is shown on the chart as a dashed vertical line. This is the maximum recommended load for continuous service.

For flow rates in between those listed, interpolate an approximate point vertically between the 2 closest curves.

Page 77: Nov mud motor handbook

69

Motor Performance Data

Figure 10: Performance Curve Example

Example: 4 ¾” 7/8 3.8 Stage PowerPLUS Power SectionGiven: Operating Pressure = 700 psi Flow Rate = 250 gpm Elastomer = PowerPLUS

From the chart, the Torque and Output Speed can be determined: Torque = 3050 lb-ft Speed = 115 rpm

Page 78: Nov mud motor handbook

70

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

C

E

Bit to Top Sub C 135 in (3.43 m)Max OD of Slick Motor w/ Straight Housing E 1.69 in (43 mm)Estimated Total Weight: 60 lbs (27 kg)Common Top Connection: NC12, AW-ROD, 1 1/4 REG, 1 1/4 AMMTCommon Btm Connection: NC12, AW-ROD, 1 1/4 REG, 1 1/4 AMMT* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Specifications on this page are for a BM3 motor*

1 11/16” 5/6 5.0 Stage CT

Recommended Operating LimitsFlow Range 25 - 45 gpm 95 - 170 lpmRevs per Unit Volume (No Load) 12.93 rev/gal 3.42 rev/LSpeed (No Load) 323 - 582 rpmApprox Press Drop @ 45 gpm (No Load) 200 psi 1400 kpa

Performance Output

Theoretical Performance Curve

Std Elastomer Max Diff Pressure 728 psi 5019 kPaStd Elastomer Torque @ Max Pressure 122 lb-ft 165 N-mPowerPLUS™ Max Diff Pressure 1092 psi 7529 kPaPowerPLUS Torque @ Max Pressure 183 lb-ft 248 N-m

[water @ 70°F (21°C)]**

Page 79: Nov mud motor handbook

71

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Differential Operating Pressure

C

E

2 1/8” 5/6 6.0 Stage CT

Bit to Top Sub C 135 in (3.43 m)Max OD of Slick Motor w/ Straight Housing E 2.13 in (54 mm)Estimated Total Weight: 90 lbs (41 kg)Common Top Connection: 1 1/4 REG, BW-ROD, 1 1/2 AMMTCommon Btm Connection: 1 1/4 REG, BW-ROD, 1 1/2 AMMT* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Specifications on this page are for a ST1 motor*

Recommended Operating LimitsFlow Range 20 - 50 gpm 76 - 189 lpmRevs per Unit Volume (No Load) 10.30 rev/gal 2.72 rev/LSpeed (No Load) 206 - 515 rpmApprox Press Drop @ 50 gpm (No Load) 200 psi 1400 kpa

Performance Output

Theoretical Performance Curve

Std Elastomer Max Diff Pressure 871 psi 6005 kPaStd Elastomer Torque @ Max Pressure 184 lb-ft 249 N-mPowerPLUS™ Max Diff Pressure 1307 psi 9008 kPaPowerPLUS Torque @ Max Pressure 276 lb-ft 374 N-m

[water @ 70°F (21°C)]**

Page 80: Nov mud motor handbook

72

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

C

E

Bit to Top Sub C 154 in (3.92 m)Max OD of Slick Motor w/ Straight Housing E 2.88 in (73 mm)Estimated Total Weight: 200 lbs (91 kg)Common Top Connection: 2 3/8 REGCommon Btm Connection: 2 3/8 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Specifications on this page are for a ST3 motor*

2 7/8” 5/6 3.5 Stage CT

Recommended Operating LimitsFlow Range 60 - 120 gpm 227 - 454 lpmRevs per Unit Volume (No Load) 3.10 rev/gal 0.82 rev/LSpeed (No Load) 186 - 372 rpmApprox Press Drop @ 120 gpm (No Load) 300 psi 2050 kpa

Performance Output

Theoretical Performance Curve

Std Elastomer Max Diff Pressure 505 psi 3482 kPaStd Elastomer Torque @ Max Pressure 315 lb-ft 427 N-mPowerPLUS™ Max Diff Pressure 758 psi 5223 kPaPowerPLUS Torque @ Max Pressure 473 lb-ft 641 N-m

[water @ 70°F (21°C)]**

Page 81: Nov mud motor handbook

73

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

C

E

Bit to Top Sub C 155 in (3.94 m)Max OD of Slick Motor w/ Straight Housing E 2.88 in (73 mm)Estimated Total Weight: 200 lbs (91 kg)Common Top Connection: 2 3/8 REGCommon Btm Connection: 2 3/8 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Specifications on this page are for a ST3 motor*

2 7/8” 5/6 3.5 Stage CT HEMI

Recommended Operating LimitsFlow Range 60 - 120 gpm 227 - 454 lpmRevs per Unit Volume (No Load) 3.33 rev/gal 0.88 rev/LSpeed (No Load) 200 - 400 rpmApprox Press Drop @ 120 gpm (No Load) 150 psi 1050 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure 883 psi 6088 kPaHEMIDRIL Torque @ Max Pressure 644 lb-ft 873 N-m

[water @ 70°F (21°C)]**

Page 82: Nov mud motor handbook

74

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

C

E

Bit to Top Sub C 161 in (4.09 m)Max OD of Slick Motor w/ Straight Housing E 2.88 in (73 mm)Estimated Total Weight: 210 lbs (95 kg)Common Top Connection: 2 3/8 REGCommon Btm Connection: 2 3/8 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Specifications on this page are for a ST3 motor*

Recommended Operating LimitsFlow Range 50 - 125 gpm 189 - 473 lpmRevs per Unit Volume (No Load) 3.76 rev/gal 0.99 rev/LSpeed (No Load) 188 - 470 rpmApprox Press Drop @ 125 gpm (No Load) 250 psi 1700 kpa

Performance Output

Theoretical Performance Curve

Std Elastomer Max Diff Pressure 680 psi 4688 kPaStd Elastomer Torque @ Max Pressure 431 lb-ft 585 N-mPowerPLUS™ Max Diff Pressure 1020 psi 7033 kPaPowerPLUS Torque @ Max Pressure 647 lb-ft 877 N-m

[water @ 70°F (21°C)]**

2 7/8” 5/6 4.7 Stage CT

Page 83: Nov mud motor handbook

75

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

C

E

Bit to Top Sub C 172 in (4.38 m)Max OD of Slick Motor w/ Straight Housing E 2.88 in (73 mm)Estimated Total Weight: 220 lbs (100 kg)Common Top Connection: 2 3/8 REGCommon Btm Connection: 2 3/8 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Specifications on this page are for a ST3 motor*

2 7/8” 5/6 7.0 Stage CT

Recommended Operating LimitsFlow Range 20 - 80 gpm 76 - 303 lpmRevs per Unit Volume (No Load) 5.28 rev/gal 1.39 rev/LSpeed (No Load) 106 - 422 rpmApprox Press Drop @ 140 gpm (No Load) 200 psi 1400 kpa

Performance Output

Theoretical Performance Curve

Std Elastomer Max Diff Pressure 1020 psi 7033 kPaStd Elastomer Torque @ Max Pressure 516 lb-ft 700 N-mPowerPLUS™ Max Diff Pressure 1530 psi 10549 kPaPowerPLUS Torque @ Max Pressure 774 lb-ft 1049 N-m

[water @ 70°F (21°C)]**

Page 84: Nov mud motor handbook

76

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

C

E

Bit to Top Sub C 174 in (4.43 m)Max OD of Slick Motor w/ Straight Housing E 3.13 in (80 mm)Estimated Total Weight: 270 lbs (122 kg)Common Top Connection: 2 3/8 REGCommon Btm Connection: 2 3/8 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Specifications on this page are for a ST2 motor*

3 1/8” 7/8 3.0 Stage CT

Recommended Operating LimitsFlow Range 80 - 140 gpm 303 - 530 lpmRevs per Unit Volume (No Load) 1.80 rev/gal 0.47 rev/LSpeed (No Load) 144 - 252 rpmApprox Press Drop @ 140 gpm (No Load) 450 psi 3100 kpa

Performance Output

Theoretical Performance Curve

Std Elastomer Max Diff Pressure 460 psi 3172 kPaStd Elastomer Torque @ Max Pressure 660 lb-ft 894 N-mPowerPLUS™ Max Diff Pressure 690 psi 4757 kPaPowerPLUS Torque @ Max Pressure 989 lb-ft 1342 N-m

[water @ 70°F (21°C)]**

Page 85: Nov mud motor handbook

77

Page 86: Nov mud motor handbook

78

®

AB

C

D EAlternate Stator Tube OD Available: 3 1/2 in (89 mm)Bit to Center of Stabilizer Blade A 9 in (0.23 m)Bit to Bend B 34 in (0.85 m)Bit to Top Sub C 178 in (4.52 m)Max OD of Motor at Upset for Stabilizer D 4.12 in (105 mm)Radius @ Adjusting Ring E 1.84 in (47 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 3.68 in (93 mm)Max OD of Slick Motor w/ Straight Housing 3.50 in (89 mm)Bit to Max Slick OD w/ Straight Housing 0.00 in (0 mm)Estimated Total Weight: 320 lbs (145 kg)Common Top Connection: 2 3/8 REG, 2 3/8 IF, 2 7/8 REGCommon Btm Connection: 2 3/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 4-1/4 4-1/2 4-3/4 4-1/4 4-1/2 4-3/4 4-1/4 4-1/2 4-3/4

0.39° 2.3 2.2 2.2 2.3 2.6 3.0 2.3 2.3 2.30.78° 5.9 4.5 4.4 6.0 6.5 6.9 4.8 4.8 4.91.15° 9.6 6.7 6.5 9.8 10.2 10.5 8.5 8.6 8.61.50° 13.1 10.7 8.5 13.3 13.6 14.0 12.1 12.1 12.21.83° 16.7 14.4 12.2 16.7 16.9 17.3 15.4 15.5 15.52.12° 20.0 17.7 15.5 20.0 19.8 20.1 18.7 18.4 18.4

**2.25° 21.5 19.2 17.0 21.5 21.1 21.4 20.2 19.7 19.72.38° 23.0 20.7 18.5 23.0 22.4 22.7 21.7 21.0 21.02.60° 25.5 23.2 20.9 25.5 24.6 24.9 24.2 23.2 23.32.77° 27.5 25.1 22.9 27.5 26.3 26.6 26.2 25.0 25.02.89° 28.9 26.5 24.2 28.9 27.5 27.8 27.6 26.2 26.22.97° 29.8 27.4 25.1 29.8 28.3 28.6 28.5 27.0 27.03.00° 30.1 27.8 25.5 30.1 28.6 28.9 28.9 27.3 27.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 4-1/4 4-1/2 4-3/4 4-1/4 4-1/2 4-3/4 4-1/4 4-1/2 4-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.838.0° 1.83 1.83 1.83 1.83 1.50 1.50 1.83 1.50 1.5012.0° 1.83 1.83 1.83 1.83 1.15 1.15 1.83 1.15 1.1516.0° 0.78 1.83 1.83 0.78 0.78 0.78 0.39 0.39 0.3920.0° 0.39 1.83 1.83 0.39 0.39 0.39 0.00 0.00 0.0024.0° 0.00 1.50 1.83 0.00 0.00 0.00 - - - 28.0° - 1.15 1.50 - - - - - - 32.0° - 0.78 1.15 - - - - - - 36.0° - 0.39 0.78 - - - - - - 40.0° - 0.00 0.39 - - - - - - 44.0° - - 0.00 - - - - - - 48.0° - - - - - - - - -

Specifications on this page are for an SR1 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

3 3/8” 4/5 5.0 Stage

Page 87: Nov mud motor handbook

79

Theoretical Performance Curve [water @ 70°F (21°C)]**

Performance OutputStd Elastomer Max Diff Pressure 750 psi 5171 kPaStd Elastomer Torque @ Max Pressure 570 lb-ft 773 N-mPowerPLUS™ Max Diff Pressure 1125 psi 7757 kPaPowerPLUS Torque @ Max Pressure 855 lb-ft 1159 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 60 - 120 gpm 227 - 454 lpm

Revs per Unit Volume (No Load) 3.43 rev/gal 0.899 rev/L

Speed (No Load) 204 - 408 rpm

Approx Press Drop @ 120 gpm (No Load) 400 psi 2750 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

3 3/8”4/5 5.0

Page 88: Nov mud motor handbook

80

®

AB

C

D EAlternate Stator Tube OD Available: 3 1/2 in (89 mm)Bit to Center of Stabilizer Blade A 9 in (0.23 m)Bit to Bend B 34 in (0.85 m)Bit to Top Sub C 178 in (4.52 m)Max OD of Motor at Upset for Stabilizer D 4.12 in (105 mm)Radius @ Adjusting Ring E 1.84 in (47 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 3.68 in (93 mm)Max OD of Slick Motor w/ Straight Housing 3.50 in (89 mm)Bit to Max Slick OD w/ Straight Housing 0.00 in (0 mm)Estimated Total Weight: 320 lbs (145 kg)Common Top Connection: 2 3/8 REG, 2 3/8 IF, 2 7/8 REGCommon Btm Connection: 2 3/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 4-1/4 4-1/2 4-3/4 4-1/4 4-1/2 4-3/4 4-1/4 4-1/2 4-3/4

0.39° 2.3 2.2 2.2 2.3 2.6 3.0 2.3 2.3 2.30.78° 5.9 4.5 4.4 6.0 6.5 6.9 4.8 4.8 4.91.15° 9.6 6.7 6.5 9.8 10.2 10.5 8.5 8.6 8.61.50° 13.1 10.7 8.5 13.3 13.6 14.0 12.1 12.1 12.21.83° 16.7 14.4 12.2 16.7 16.9 17.3 15.4 15.5 15.52.12° 20.0 17.7 15.5 20.0 19.8 20.1 18.7 18.4 18.4

**2.25° 21.5 19.2 17.0 21.5 21.1 21.4 20.2 19.7 19.72.38° 23.0 20.7 18.5 23.0 22.4 22.7 21.7 21.0 21.02.60° 25.5 23.2 20.9 25.5 24.6 24.9 24.2 23.2 23.32.77° 27.5 25.1 22.9 27.5 26.3 26.6 26.2 25.0 25.02.89° 28.9 26.5 24.2 28.9 27.5 27.8 27.6 26.2 26.22.97° 29.8 27.4 25.1 29.8 28.3 28.6 28.5 27.0 27.03.00° 30.1 27.8 25.5 30.1 28.6 28.9 28.9 27.3 27.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 4-1/4 4-1/2 4-3/4 4-1/4 4-1/2 4-3/4 4-1/4 4-1/2 4-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.838.0° 1.83 1.83 1.83 1.83 1.50 1.50 1.83 1.50 1.50

12.0° 1.83 1.83 1.83 1.83 1.15 1.15 1.83 1.15 1.1516.0° 0.78 1.83 1.83 0.78 0.78 0.78 0.39 0.39 0.3920.0° 0.39 1.83 1.83 0.39 0.39 0.39 0.00 0.00 0.0024.0° 0.00 1.50 1.83 0.00 0.00 0.00 - - - 28.0° - 1.15 1.50 - - - - - - 32.0° - 0.78 1.15 - - - - - - 36.0° - 0.39 0.78 - - - - - - 40.0° - 0.00 0.39 - - - - - - 44.0° - - 0.00 - - - - - - 48.0° - - - - - - - - -

Specifications on this page are for an SR1 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

3 3/8” 7/8 3.0 Stage

Page 89: Nov mud motor handbook

81

Theoretical Performance Curve

3 3/8”7/8 3.0

Performance OutputStd Elastomer Max Diff Pressure 460 psi 3172 kPaStd Elastomer Torque @ Max Pressure 782 lb-ft 1060 N-mPowerPLUS™ Max Diff Pressure 690 psi 4757 kPaPowerPLUS Torque @ Max Pressure 1173 lb-ft 1590 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 60 - 120 gpm 227 - 454 lpm

Revs per Unit Volume (No Load) 1.56 rev/gal 0.413 rev/L

Speed (No Load) 94 - 188 rpm

Approx Press Drop @ 120 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 90: Nov mud motor handbook

82

®

AB

C

D EAlternate Stator Tube OD Available: 3 5/8 in (92 mm)Bit to Center of Stabilizer Blade A 18 in (0.45 m)Bit to Bend B 48 in (1.23 m)Bit to Top Sub C 225 in (5.71 m)Max OD of Motor at Upset for Stabilizer D 4.37 in (111 mm)Radius @ Adjusting Ring E 2.09 in (53 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 4.18 in (106 mm)Max OD of Slick Motor w/ Straight Housing 3.75 in (95 mm)Bit to Max Slick OD w/ Straight Housing 0.00 in (0 mm)Estimated Total Weight: 490 lbs (222 kg)Common Top Connection: 2 3/8 IF, 2 7/8 REG, 2 7/8 H-90Common Btm Connection: 2 7/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8

0.39° 1.8 1.8 1.8 2.6 3.4 3.8 1.9 1.8 1.80.78° 5.0 3.6 3.5 5.8 6.5 6.9 4.8 4.9 4.91.15° 8.4 5.2 5.2 8.7 9.4 9.8 7.9 7.9 7.91.50° 11.7 7.8 6.8 11.7 12.2 12.5 10.7 10.7 10.81.83° 14.7 10.8 9.0 14.7 14.8 15.1 13.8 13.4 13.42.12° 17.4 13.5 11.6 17.4 17.1 17.4 16.6 15.8 15.8

**2.25° 18.6 14.7 12.8 18.6 18.2 18.4 17.8 16.9 16.92.38° 19.8 15.8 13.9 19.8 19.2 19.4 19.0 17.9 17.92.60° 21.9 17.8 15.9 21.9 20.9 21.1 21.1 19.7 19.72.77° 23.4 19.4 17.5 23.4 22.3 22.5 22.7 21.1 21.12.89° 24.6 20.5 18.5 24.6 23.2 23.4 23.8 22.1 22.12.97° 25.3 21.2 19.3 25.3 23.9 24.1 24.6 22.7 22.73.00° 25.6 21.5 19.5 25.6 24.1 24.3 24.9 23.0 23.0

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.50 1.50 1.83 1.50 1.508.0° 1.83 1.83 1.83 1.83 1.15 1.15 1.83 0.78 0.78

12.0° 1.83 1.83 1.83 0.39 0.78 0.78 0.39 0.39 0.3916.0° 1.50 1.83 1.83 0.00 0.39 0.39 0.00 0.00 0.0020.0° 1.15 1.83 1.83 - - 0.00 - - - 24.0° 0.78 1.15 1.50 - - - - - - 28.0° 0.39 0.78 1.15 - - - - - - 32.0° 0.00 0.39 0.78 - - - - - - 36.0° - 0.00 0.39 - - - - - - 40.0° - - 0.00 - - - - - - 44.0° - - - - - - - - - 48.0° - - - - - - - - -

Specifications on this page are for an ST2 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

3 3/4” 4/5 3.5 Stage

Page 91: Nov mud motor handbook

83

Theoretical Performance Curve

3 3/4”4/5 3.5

Performance OutputStd Elastomer Max Diff Pressure 520 psi 3585 kPaStd Elastomer Torque @ Max Pressure 918 lb-ft 1244 N-mPowerPLUS™ Max Diff Pressure 780 psi 5378 kPaPowerPLUS Torque @ Max Pressure 1377 lb-ft 1867 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 80 - 160 gpm 303 - 606 lpm

Revs per Unit Volume (No Load) 1.56 rev/gal 0.412 rev/L

Speed (No Load) 125 - 250 rpm

Approx Press Drop @ 160 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 92: Nov mud motor handbook

84

®

AB

C

D EAlternate Stator Tube OD Available: 3 5/8 in (92 mm)Bit to Center of Stabilizer Blade A 18 in (0.45 m)Bit to Bend B 48 in (1.23 m)Bit to Top Sub C 264 in (6.70 m)Max OD of Motor at Upset for Stabilizer D 4.37 in (111 mm)Radius @ Adjusting Ring E 2.09 in (53 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 4.18 in (106 mm)Max OD of Slick Motor w/ Straight Housing 3.75 in (95 mm)Bit to Max Slick OD w/ Straight Housing 0.00 in (0 mm)Estimated Total Weight: 580 lbs (263 kg)Common Top Connection: 2 3/8 IF, 2 7/8 REG, 2 7/8 H-90Common Btm Connection: 2 7/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8

0.39° 1.6 1.6 1.5 2.2 2.8 3.1 1.6 1.6 1.60.78° 4.2 3.1 3.1 5.0 5.6 5.8 4.3 4.4 4.41.15° 7.2 4.6 4.5 7.6 8.2 8.4 7.0 7.0 7.01.50° 10.0 6.7 5.9 10.2 10.6 10.9 9.5 9.6 9.61.83° 12.7 9.4 7.8 12.7 13.0 13.2 12.1 11.9 11.92.12° 15.0 11.7 10.0 15.0 15.0 15.2 14.4 14.0 14.0

**2.25° 16.1 12.7 11.1 16.1 15.9 16.1 15.5 15.0 15.02.38° 17.1 13.7 12.1 17.1 16.8 17.0 16.6 15.9 15.92.60° 18.9 15.5 13.8 18.9 18.4 18.6 18.4 17.5 17.52.77° 20.3 16.8 15.1 20.3 19.6 19.7 19.8 18.7 18.72.89° 21.3 17.8 16.1 21.3 20.4 20.6 20.7 19.6 19.62.97° 21.9 18.4 16.7 21.9 21.0 21.1 21.4 20.2 20.23.00° 22.1 18.6 17.0 22.1 21.2 21.3 21.6 20.4 20.4

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.837.0° 1.83 1.83 1.83 1.83 1.15 1.50 1.83 1.15 1.15

10.5° 1.83 1.83 1.83 0.78 0.78 0.78 1.83 0.78 0.7814.0° 1.83 1.83 1.83 0.39 0.39 0.39 0.39 0.00 0.0017.5° 1.50 1.83 1.83 0.00 0.00 0.00 - - - 21.0° 0.78 1.50 1.83 - - - - - - 24.5° 0.39 1.15 1.50 - - - - - - 28.0° 0.00 0.78 1.15 - - - - - - 31.5° - 0.39 0.78 - - - - - - 35.0° - 0.00 0.39 - - - - - - 38.5° - - 0.00 - - - - - - 42.0° - - - - - - - - -

Specifications on this page are for an ST2 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

3 3/4” 5/6 5.0 Stage

Page 93: Nov mud motor handbook

85

Performance OutputStd Elastomer Max Diff Pressure 725 psi 4999 kPaStd Elastomer Torque @ Max Pressure 1055 lb-ft 1430 N-mPowerPLUS™ Max Diff Pressure 1088 psi 7498 kPaPowerPLUS Torque @ Max Pressure 1582 lb-ft 2145 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 160 gpm 379 - 606 lpm

Revs per Unit Volume (No Load) 1.51 rev/gal 0.4 rev/L

Speed (No Load) 151 - 242 rpm

Approx Press Drop @ 160 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

3 3/4”5/6 5.0

Page 94: Nov mud motor handbook

86

®

AB

C

D EAlternate Stator Tube OD Available: 3 7/8 in (98 mm)Bit to Center of Stabilizer Blade A 18 in (0.45 m)Bit to Bend B 48 in (1.23 m)Bit to Top Sub C 244 in (6.19 m)Max OD of Motor at Upset for Stabilizer D 4.37 in (111 mm)Radius @ Adjusting Ring E 2.09 in (53 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 4.18 in (106 mm)Max OD of Slick Motor w/ Straight Housing 3.75 in (95 mm)Bit to Max Slick OD w/ Straight Housing 0.00 in (0 mm)Estimated Total Weight: 530 lbs (240 kg)Common Top Connection: 2 3/8 IF, 2 7/8 REG, 2 7/8 H-90Common Btm Connection: 2 7/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8

0.39° 1.7 1.7 1.6 2.4 3.1 3.4 1.7 1.7 1.70.78° 4.6 3.3 3.3 5.4 6.0 6.3 4.6 4.6 4.61.15° 7.8 4.9 4.8 8.2 8.8 9.1 7.4 7.4 7.51.50° 10.8 7.3 6.3 10.8 11.4 11.7 10.1 10.1 10.11.83° 13.7 10.1 8.3 13.7 13.9 14.1 12.9 12.7 12.72.12° 16.2 12.5 10.8 16.2 16.0 16.2 15.4 14.9 14.9

**2.25° 17.3 13.6 11.9 17.3 17.0 17.2 16.6 15.9 15.92.38° 18.4 14.7 13.0 18.4 18.0 18.2 17.7 16.9 16.92.60° 20.3 16.6 14.8 20.3 19.6 19.8 19.7 18.6 18.62.77° 21.8 18.0 16.2 21.8 20.9 21.1 21.2 19.9 19.92.89° 22.8 19.1 17.3 22.8 21.8 21.9 22.2 20.8 20.82.97° 23.5 19.7 17.9 23.5 22.4 22.5 22.9 21.4 21.43.00° 23.8 20.0 18.2 23.8 22.6 22.8 23.2 21.6 21.6

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.507.0° 1.83 1.83 1.83 1.83 1.15 1.50 1.83 1.15 1.15

10.5° 1.83 1.83 1.83 1.83 0.78 0.78 1.83 0.78 0.7814.0° 1.83 1.83 1.83 0.39 0.39 0.39 0.39 0.00 0.0017.5° 1.15 1.83 1.83 0.00 0.00 0.00 - - - 21.0° 0.78 1.50 1.83 - - - - - - 24.5° 0.39 1.15 1.50 - - - - - - 28.0° 0.39 0.78 1.15 - - - - - - 31.5° 0.00 0.39 0.78 - - - - - - 35.0° - 0.00 0.39 - - - - - - 38.5° - - 0.00 - - - - - - 42.0° - - - - - - - - -

Specifications on this page are for an ST2 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

3 3/4” 6/7 3.0 Stage

Page 95: Nov mud motor handbook

87

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Performance OutputStd Elastomer Max Diff Pressure 440 psi 3034 kPaStd Elastomer Torque @ Max Pressure 1314 lb-ft 1781 N-mPowerPLUS™ Max Diff Pressure 660 psi 4551 kPaPowerPLUS Torque @ Max Pressure 1971 lb-ft 2672 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 80 - 200 gpm 303 - 757 lpm

Revs per Unit Volume (No Load) 0.8 rev/gal 0.211 rev/L

Speed (No Load) 64 - 160 rpm

Approx Press Drop @ 200 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

3 3/4”6/7 3.0

Page 96: Nov mud motor handbook

88

®

AB

C

D EAlternate Stator Tube OD Available: 3 7/8 in (98 mm)Bit to Center of Stabilizer Blade A 18 in (0.45 m)Bit to Bend B 48 in (1.23 m)Bit to Top Sub C 244 in (6.19 m)Max OD of Motor at Upset for Stabilizer D 4.37 in (111 mm)Radius @ Adjusting Ring E 2.09 in (53 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 4.18 in (106 mm)Max OD of Slick Motor w/ Straight Housing 3.75 in (95 mm)Bit to Max Slick OD w/ Straight Housing 0.00 in (0 mm)Estimated Total Weight: 530 lbs (240 kg)Common Top Connection: 2 3/8 IF, 2 7/8 REG, 2 7/8 H-90Common Btm Connection: 2 7/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8

0.39° 1.7 1.7 1.6 2.4 3.1 3.4 1.7 1.7 1.70.78° 4.6 3.3 3.3 5.4 6.0 6.3 4.6 4.6 4.61.15° 7.8 4.9 4.8 8.2 8.8 9.1 7.4 7.4 7.51.50° 10.8 7.3 6.3 10.8 11.4 11.7 10.1 10.1 10.11.83° 13.7 10.1 8.3 13.7 13.9 14.1 12.9 12.7 12.72.12° 16.2 12.5 10.8 16.2 16.0 16.2 15.4 14.9 14.9

**2.25° 17.3 13.6 11.9 17.3 17.0 17.2 16.6 15.9 15.92.38° 18.4 14.7 13.0 18.4 18.0 18.2 17.7 16.9 16.92.60° 20.3 16.6 14.8 20.3 19.6 19.8 19.7 18.6 18.62.77° 21.8 18.0 16.2 21.8 20.9 21.1 21.2 19.9 19.92.89° 22.8 19.1 17.3 22.8 21.8 21.9 22.2 20.8 20.82.97° 23.5 19.7 17.9 23.5 22.4 22.5 22.9 21.4 21.43.00° 23.8 20.0 18.2 23.8 22.6 22.8 23.2 21.6 21.6

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.507.0° 1.83 1.83 1.83 1.83 1.15 1.50 1.83 1.15 1.15

10.5° 1.83 1.83 1.83 1.83 0.78 0.78 1.83 0.78 0.7814.0° 1.83 1.83 1.83 0.39 0.39 0.39 0.39 0.00 0.0017.5° 1.15 1.83 1.83 0.00 0.00 0.00 - - - 21.0° 0.78 1.50 1.83 - - - - - - 24.5° 0.39 1.15 1.50 - - - - - - 28.0° 0.39 0.78 1.15 - - - - - - 31.5° 0.00 0.39 0.78 - - - - - - 35.0° - 0.00 0.39 - - - - - - 38.5° - - 0.00 - - - - - - 42.0° - - - - - - - - -

Specifications on this page are for an ST2 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

3 3/4” 7/8 2.0 Stage

Page 97: Nov mud motor handbook

89

Theoretical Performance Curve

Performance OutputStd Elastomer Max Diff Pressure 295 psi 2034 kPaStd Elastomer Torque @ Max Pressure 1311 lb-ft 1778 N-mPowerPLUS™ Max Diff Pressure 443 psi 3051 kPaPowerPLUS Torque @ Max Pressure 1967 lb-ft 2667 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 160 gpm 379 - 606 lpm

Revs per Unit Volume (No Load) 0.56 rev/gal 0.147 rev/L

Speed (No Load) 56 - 89 rpm

Approx Press Drop @ 160 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

3 3/4”7/8 2.0

Page 98: Nov mud motor handbook

90

®

AB

C

D EAlternate Stator Tube OD Available: 3 5/8 in (92 mm)Bit to Center of Stabilizer Blade A 18 in (0.45 m)Bit to Bend B 48 in (1.23 m)Bit to Top Sub C 225 in (5.71 m)Max OD of Motor at Upset for Stabilizer D 4.37 in (111 mm)Radius @ Adjusting Ring E 2.09 in (53 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 4.18 in (106 mm)Max OD of Slick Motor w/ Straight Housing 3.75 in (95 mm)Bit to Max Slick OD w/ Straight Housing 0.00 in (0 mm)Estimated Total Weight: 490 lbs (222 kg)Common Top Connection: 2 3/8 IF, 2 7/8 REG, 2 7/8 H-90Common Btm Connection: 2 7/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8

0.39° 1.8 1.8 1.8 2.6 3.4 3.8 1.9 1.8 1.80.78° 5.0 3.6 3.5 5.8 6.5 6.9 4.8 4.9 4.91.15° 8.4 5.2 5.2 8.7 9.4 9.8 7.9 7.9 7.91.50° 11.7 7.8 6.8 11.7 12.2 12.5 10.7 10.7 10.81.83° 14.7 10.8 9.0 14.7 14.8 15.1 13.8 13.4 13.42.12° 17.4 13.5 11.6 17.4 17.1 17.4 16.6 15.8 15.8

**2.25° 18.6 14.7 12.8 18.6 18.2 18.4 17.8 16.9 16.92.38° 19.8 15.8 13.9 19.8 19.2 19.4 19.0 17.9 17.92.60° 21.9 17.8 15.9 21.9 20.9 21.1 21.1 19.7 19.72.77° 23.4 19.4 17.5 23.4 22.3 22.5 22.7 21.1 21.12.89° 24.6 20.5 18.5 24.6 23.2 23.4 23.8 22.1 22.12.97° 25.3 21.2 19.3 25.3 23.9 24.1 24.6 22.7 22.73.00° 25.6 21.5 19.5 25.6 24.1 24.3 24.9 23.0 23.0

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8 4-3/4 5-1/2 5-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.50 1.50 1.83 1.50 1.508.0° 1.83 1.83 1.83 1.83 1.15 1.15 1.83 0.78 0.78

12.0° 1.83 1.83 1.83 0.39 0.78 0.78 0.39 0.39 0.3916.0° 1.50 1.83 1.83 0.00 0.39 0.39 0.00 0.00 0.0020.0° 1.15 1.83 1.83 - - 0.00 - - - 24.0° 0.78 1.15 1.50 - - - - - - 28.0° 0.39 0.78 1.15 - - - - - - 32.0° 0.00 0.39 0.78 - - - - - - 36.0° - 0.00 0.39 - - - - - - 40.0° - - 0.00 - - - - - - 44.0° - - - - - - - - - 48.0° - - - - - - - - -

Specifications on this page are for an ST2 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

3 3/4” 7/8 2.3 Stage

Page 99: Nov mud motor handbook

91

Performance OutputStd Elastomer Max Diff Pressure 350 psi 2413 kPaStd Elastomer Torque @ Max Pressure 1124 lb-ft 1524 N-mPowerPLUS™ Max Diff Pressure 525 psi 3620 kPaPowerPLUS Torque @ Max Pressure 1686 lb-ft 2286 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 160 gpm 379 - 606 lpm

Revs per Unit Volume (No Load) 0.76 rev/gal 0.201 rev/L

Speed (No Load) 76 - 122 rpm

Approx Press Drop @ 160 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

3 3/4”7/8 2.3

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 100: Nov mud motor handbook

92

®

AB

C

D EAlternate Stator Tube OD Available: 5 in (127 mm)Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 358 in (9.09 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1260 lbs (572 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.6 1.2 1.2 1.8 1.9 2.1 1.3 1.3 1.30.78° 4.0 3.3 2.3 4.0 4.0 4.2 3.5 3.4 3.41.15° 6.2 5.5 4.3 6.2 5.9 6.1 5.8 5.5 5.51.50° 8.3 7.6 6.3 8.3 7.8 8.0 7.9 7.4 7.41.83° 10.3 9.6 8.3 10.3 9.6 9.7 10.0 9.2 9.22.12° 12.0 11.3 10.0 12.0 11.3 11.2 11.8 11.0 10.8

**2.25° 12.8 12.1 10.8 12.8 12.1 11.9 12.6 11.8 11.52.38° 13.6 12.9 11.5 13.6 12.9 12.6 13.4 12.6 12.22.60° 14.9 14.2 12.8 14.9 14.2 13.8 14.7 13.9 13.42.77° 15.9 15.2 13.8 15.9 15.2 14.7 15.8 15.0 14.32.89° 16.6 15.9 14.5 16.6 15.9 15.3 16.5 15.7 15.02.97° 17.1 16.4 15.0 17.1 16.4 15.7 17.0 16.2 15.43.00° 17.3 16.6 15.2 17.3 16.6 15.9 17.2 16.4 15.6

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.508.0° 1.15 1.50 1.83 1.15 1.50 1.50 1.15 1.50 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 1.15 0.78 1.15 0.7812.0° 0.78 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3914.0° 0.39 0.39 0.78 0.39 0.39 0.39 0.39 0.00 0.0016.0° 0.00 0.00 0.39 0.00 0.00 0.00 0.00 0.00 - 18.0° - 0.00 0.39 - - - - - - 20.0° - - 0.00 - - - - - - 22.0° - - - - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 2/3 8.0 Stage

Page 101: Nov mud motor handbook

93

Performance OutputStd Elastomer Max Diff Pressure 1135 psi 7826 kPaStd Elastomer Torque @ Max Pressure 1428 lb-ft 1936 N-mPowerPLUS™ Max Diff Pressure 1703 psi 11738 kPaPowerPLUS Torque @ Max Pressure 2142 lb-ft 2904 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 260 gpm 379 - 984 lpm

Revs per Unit Volume (No Load) 1.99 rev/gal 0.524 rev/L

Speed (No Load) 199 - 516 rpm

Approx Press Drop @ 260 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

4 3/4”2/3 8.0

Page 102: Nov mud motor handbook

94

®

AB

C

D EAlternate Stator Tube OD Available: 5 in (127 mm)Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 225 in (5.71 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 790 lbs (358 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 2.9 1.9 1.7 2.9 3.1 3.6 1.8 1.8 1.80.78° 6.4 5.4 3.5 6.4 6.0 6.5 5.1 4.7 4.71.15° 9.7 8.7 6.7 9.7 8.8 9.2 8.6 7.6 7.61.50° 12.9 11.8 9.8 12.9 11.8 11.7 11.9 10.5 10.31.83° 15.8 14.8 12.7 15.8 14.8 14.2 15.0 13.6 12.82.12° 18.4 17.4 15.3 18.4 17.4 16.3 17.7 16.4 15.0

**2.25° 19.6 18.5 16.4 19.6 18.5 17.2 19.0 17.6 16.02.38° 20.8 19.7 17.6 20.8 19.7 18.2 20.2 18.8 17.02.60° 22.7 21.6 19.5 22.7 21.6 19.8 22.3 20.9 18.72.77° 24.3 23.1 21.0 24.3 23.1 21.0 23.8 22.5 20.02.89° 25.3 24.2 22.1 25.3 24.2 22.1 25.0 23.6 21.02.97° 26.0 24.9 22.8 26.0 24.9 22.8 25.7 24.4 21.63.00° 26.3 25.2 23.0 26.3 25.2 23.0 26.0 24.6 21.9

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.505.0° 1.50 1.50 1.83 1.50 1.50 1.50 1.15 1.50 1.507.5° 1.15 1.50 1.83 1.15 1.50 1.15 1.15 1.15 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 0.78 0.78 0.78 0.7812.5° 0.78 0.78 1.15 0.78 0.39 0.78 0.39 0.39 0.3915.0° 0.39 0.78 1.15 0.39 0.39 0.39 0.00 0.00 0.0017.5° 0.00 0.39 0.78 0.00 0.00 0.00 - - - 20.0° 0.00 0.00 0.39 - - - - - - 22.5° - 0.00 0.39 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 4/5 3.5 Stage

Page 103: Nov mud motor handbook

95

Theoretical Performance Curve

Performance OutputStd Elastomer Max Diff Pressure 520 psi 3585 kPaStd Elastomer Torque @ Max Pressure 1218 lb-ft 1651 N-mPowerPLUS™ Max Diff Pressure 780 psi 5378 kPaPowerPLUS Torque @ Max Pressure 1827 lb-ft 2477 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 250 gpm 379 - 946 lpm

Revs per Unit Volume (No Load) 1.07 rev/gal 0.282 rev/L

Speed (No Load) 107 - 267 rpm

Approx Press Drop @ 250 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

4 3/4”4/5 3.5

Page 104: Nov mud motor handbook

96

®

AB

C

D E

Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 290 in (7.36 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1020 lbs (463 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 2.1 1.4 1.4 2.2 2.4 2.7 1.5 1.5 1.50.78° 4.9 4.1 2.8 4.9 4.8 5.1 4.2 4.0 4.01.15° 7.6 6.8 5.2 7.6 7.1 7.4 7.0 6.4 6.41.50° 10.1 9.3 7.7 10.1 9.3 9.5 9.6 8.6 8.61.83° 12.5 11.7 10.1 12.5 11.7 11.6 12.1 11.0 10.82.12° 14.6 13.8 12.1 14.6 13.8 13.4 14.2 13.2 12.6

**2.25° 15.5 14.7 13.1 15.5 14.7 14.2 15.2 14.2 13.52.38° 16.5 15.6 14.0 16.5 15.6 15.0 16.2 15.2 14.32.60° 18.1 17.2 15.5 18.1 17.2 16.3 17.8 16.8 15.72.77° 19.3 18.4 16.8 19.3 18.4 17.4 19.1 18.1 16.82.89° 20.2 19.3 17.6 20.2 19.3 18.1 20.0 19.0 17.62.97° 20.7 19.9 18.2 20.7 19.9 18.6 20.6 19.6 18.13.00° 21.0 20.1 18.4 21.0 20.1 18.8 20.8 19.8 18.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.836.0° 1.50 1.50 1.83 1.50 1.50 1.50 1.50 1.50 1.508.0° 1.15 1.15 1.83 1.15 1.15 1.15 1.15 1.15 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 1.15 0.78 0.78 0.7812.0° 0.78 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3914.0° 0.39 0.39 0.78 0.39 0.39 0.39 0.39 0.00 0.0016.0° 0.00 0.39 0.78 0.00 0.00 0.00 0.00 0.00 0.0018.0° 0.00 0.00 0.39 - - - - - - 20.0° - 0.00 0.00 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 4/5 6.0 Stage

Page 105: Nov mud motor handbook

97

Performance OutputStd Elastomer Max Diff Pressure 840 psi 5792 kPaStd Elastomer Torque @ Max Pressure 2011 lb-ft 2726 N-mPowerPLUS™ Max Diff Pressure 1260 psi 8687 kPaPowerPLUS Torque @ Max Pressure 3016 lb-ft 4090 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 250 gpm 379 - 946 lpm

Revs per Unit Volume (No Load) 1.01 rev/gal 0.268 rev/L

Speed (No Load) 101 - 253 rpm

Approx Press Drop @ 250 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

4 3/4”4/5 6.0

Page 106: Nov mud motor handbook

98

®

AB

C

D EAlternate Stator Tube OD Available: 5 in (127 mm)Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 310 in (7.87 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1090 lbs (494 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.9 1.3 1.3 2.1 2.2 2.5 1.4 1.4 1.40.78° 4.6 3.9 2.6 4.6 4.5 4.8 4.0 3.8 3.81.15° 7.1 6.4 4.9 7.1 6.7 7.0 6.6 6.1 6.11.50° 9.5 8.7 7.3 9.5 8.8 9.0 9.0 8.2 8.21.83° 11.8 11.0 9.5 11.8 11.0 10.9 11.4 10.4 10.22.12° 13.7 12.9 11.4 13.7 12.9 12.7 13.4 12.5 12.0

**2.25° 14.6 13.8 12.3 14.6 13.8 13.4 14.3 13.4 12.82.38° 15.5 14.7 13.2 15.5 14.7 14.2 15.2 14.3 13.62.60° 17.0 16.2 14.6 17.0 16.2 15.5 16.8 15.9 15.02.77° 18.2 17.4 15.8 18.2 17.4 16.5 18.0 17.0 16.02.89° 19.0 18.2 16.6 19.0 18.2 17.2 18.8 17.9 16.72.97° 19.5 18.7 17.1 19.5 18.7 17.6 19.4 18.5 17.23.00° 19.7 18.9 17.3 19.7 18.9 17.8 19.6 18.7 17.4

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.50 1.83 1.50 1.50 1.50 1.50 1.50 1.508.0° 1.15 1.50 1.83 1.15 1.50 1.15 1.15 1.15 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 1.15 0.78 0.78 0.7812.0° 0.78 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3914.0° 0.39 0.39 0.78 0.39 0.39 0.39 0.39 0.00 0.0016.0° 0.00 0.39 0.78 0.00 0.00 0.00 0.00 0.00 0.0018.0° 0.00 0.00 0.39 - - - - - - 20.0° - - 0.00 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 4/5 6.3 Stage

Page 107: Nov mud motor handbook

99

Theoretical Performance Curve

Performance OutputStd Elastomer Max Diff Pressure 955 psi 6584 kPaStd Elastomer Torque @ Max Pressure 2286 lb-ft 3100 N-mPowerPLUS™ Max Diff Pressure 1433 psi 9877 kPaPowerPLUS Torque @ Max Pressure 3429 lb-ft 4650 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 250 gpm 379 - 946 lpm

Revs per Unit Volume (No Load) 1.01 rev/gal 0.268 rev/L

Speed (No Load) 101 - 253 rpm

Approx Press Drop @ 250 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

4 3/4”4/5 6.3

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 108: Nov mud motor handbook

100

®

AB

C

D E

Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 345 in (8.77 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1210 lbs (549 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.7 1.2 1.2 1.8 2.0 2.2 1.3 1.3 1.30.78° 4.1 3.5 2.4 4.1 4.1 4.3 3.6 3.5 3.51.15° 6.4 5.7 4.4 6.4 6.1 6.3 6.0 5.6 5.61.50° 8.6 7.9 6.5 8.6 8.0 8.2 8.2 7.6 7.61.83° 10.6 9.9 8.6 10.6 9.9 10.0 10.3 9.5 9.42.12° 12.4 11.7 10.3 12.4 11.7 11.6 12.2 11.3 11.1

**2.25° 13.2 12.5 11.1 13.2 12.5 12.3 13.0 12.2 11.82.38° 14.0 13.3 11.9 14.0 13.3 13.0 13.8 13.0 12.52.60° 15.4 14.7 13.3 15.4 14.7 14.2 15.2 14.4 13.82.77° 16.4 15.7 14.3 16.4 15.7 15.1 16.3 15.5 14.72.89° 17.2 16.4 15.0 17.2 16.4 15.7 17.1 16.2 15.42.97° 17.7 16.9 15.5 17.7 16.9 16.2 17.6 16.8 15.83.00° 17.9 17.1 15.7 17.9 17.1 16.3 17.8 16.9 16.0

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.50 1.508.0° 1.15 1.50 1.83 1.15 1.50 1.50 1.15 1.15 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 1.15 0.78 1.15 0.7812.0° 0.78 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3914.0° 0.39 0.39 0.78 0.39 0.39 0.39 0.39 0.00 0.0016.0° 0.00 0.39 0.39 0.00 0.00 0.00 0.00 0.00 - 18.0° - 0.00 0.39 - - - - - - 20.0° - - 0.00 - - - - - - 22.0° - - - - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 5/6 8.3 Stage

Page 109: Nov mud motor handbook

101

Performance OutputStd Elastomer Max Diff Pressure 1190 psi 8205 kPaStd Elastomer Torque @ Max Pressure 3207 lb-ft 4348 N-mPowerPLUS™ Max Diff Pressure 1785 psi 12307 kPaPowerPLUS Torque @ Max Pressure 4811 lb-ft 6522 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 150 - 300 gpm 568 - 1136 lpm

Revs per Unit Volume (No Load) 1.09 rev/gal 0.287 rev/L

Speed (No Load) 163 - 326 rpm

Approx Press Drop @ 300 gpm (No Load) 650 psi 4500 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

4 3/4”5/6 8.3

Page 110: Nov mud motor handbook

102

®

AB

C

D EAlternate Stator Tube OD Available: 5 in (127 mm)Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 283 in (7.18 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 990 lbs (449 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 2.2 1.4 1.4 2.3 2.4 2.8 1.5 1.5 1.50.78° 5.0 4.2 2.8 5.0 4.9 5.2 4.3 4.1 4.11.15° 7.8 7.0 5.4 7.8 7.2 7.5 7.1 6.5 6.51.50° 10.4 9.5 7.9 10.4 9.5 9.7 9.8 8.8 8.81.83° 12.8 12.0 10.3 12.8 12.0 11.8 12.3 11.3 11.02.12° 14.9 14.1 12.4 14.9 14.1 13.6 14.5 13.5 12.9

**2.25° 15.9 15.0 13.4 15.9 15.0 14.4 15.5 14.5 13.72.38° 16.9 16.0 14.3 16.9 16.0 15.3 16.5 15.5 14.62.60° 18.5 17.6 15.9 18.5 17.6 16.6 18.2 17.2 16.02.77° 19.7 18.8 17.1 19.7 18.8 17.7 19.5 18.5 17.12.89° 20.6 19.7 18.0 20.6 19.7 18.4 20.4 19.4 17.92.97° 21.2 20.3 18.6 21.2 20.3 19.0 21.0 20.0 18.43.00° 21.4 20.5 18.8 21.4 20.5 19.1 21.3 20.2 18.6

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.836.0° 1.50 1.50 1.83 1.50 1.50 1.50 1.15 1.50 1.508.0° 1.15 1.15 1.83 1.15 1.15 1.15 1.15 1.15 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 1.15 0.78 0.78 0.7812.0° 0.78 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3914.0° 0.39 0.39 0.78 0.39 0.39 0.39 0.39 0.00 0.0016.0° 0.00 0.39 0.78 0.00 0.00 0.00 0.00 0.00 0.0018.0° 0.00 0.00 0.39 - - 0.00 - - - 20.0° - 0.00 0.00 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 7/8 2.0 Stage

Page 111: Nov mud motor handbook

103

Performance OutputStd Elastomer Max Diff Pressure 280 psi 1931 kPaStd Elastomer Torque @ Max Pressure 806 lb-ft 2448 N-mPowerPLUS™ Max Diff Pressure 420 psi 2896 kPaPowerPLUS Torque @ Max Pressure 2709 lb-ft 3672 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 250 gpm 379 - 946 lpm

Revs per Unit Volume (No Load) 0.32 rev/gal 0.085 rev/L

Speed (No Load) 32 - 80 rpm

Approx Press Drop @ 250 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

4 3/4”7/8 2.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 112: Nov mud motor handbook

104

®

AB

C

D EAlternate Stator Tube OD Available: 5 in (127 mm)Bit to Center of Stabilizer Blade A 21 in (0.53 m)Bit to Bend B 46 in (1.17 m)Bit to Top Sub C 268 in (6.79 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.56 in (141 mm)Bit to Max Slick OD w/ Straight Housing 6.70 in (170 mm)Estimated Total Weight: 940 lbs (426 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.9 1.5 1.5 2.6 2.8 3.1 1.8 1.8 1.80.78° 4.9 3.8 3.0 5.3 5.5 5.8 4.6 4.6 4.61.15° 7.7 6.7 4.5 7.9 8.1 8.4 7.3 7.3 7.31.50° 10.4 9.3 7.2 10.4 10.5 10.8 9.8 9.8 9.81.83° 13.0 11.9 9.7 13.0 12.8 13.1 12.5 12.2 12.22.12° 15.2 14.1 11.9 15.2 14.9 15.1 14.8 14.4 14.4

**2.25° 16.2 15.1 12.9 16.2 15.8 16.0 15.9 15.3 15.32.38° 17.2 16.1 13.9 17.2 16.7 16.9 16.9 16.3 16.22.60° 18.9 17.8 15.6 18.9 18.2 18.4 18.7 17.9 17.82.77° 20.3 19.1 16.9 20.3 19.4 19.6 20.1 19.1 19.12.89° 21.2 20.0 17.8 21.2 20.3 20.4 21.0 20.0 19.92.97° 21.8 20.6 18.4 21.8 20.8 21.0 21.7 20.5 20.53.00° 22.0 20.9 18.6 22.0 21.0 21.2 21.9 20.8 20.7

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.837.5° 1.15 1.50 1.83 1.15 1.50 1.50 1.15 1.15 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 1.15 0.78 1.15 1.1512.5° 0.78 0.78 1.15 0.78 0.78 0.78 0.78 0.78 0.7815.0° 0.39 0.39 0.78 0.39 0.39 0.39 0.39 0.39 0.3917.5° 0.00 0.39 0.78 0.00 0.00 0.39 0.00 0.00 0.0020.0° - 0.00 0.39 0.00 0.00 0.00 - - - 22.5° - - 0.00 - - - - - - 25.0° - - - - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an SR3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 7/8 2.0 Stage SR3

Page 113: Nov mud motor handbook

105

Performance OutputStd Elastomer Max Diff Pressure 280 psi 1931 kPaStd Elastomer Torque @ Max Pressure 1806 lb-ft 2448 N-mPowerPLUS™ Max Diff Pressure 420 psi 2896 kPaPowerPLUS Torque @ Max Pressure 2709 lb-ft 3672 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 250 gpm 379 - 946 lpm

Revs per Unit Volume (No Load) 0.32 rev/gal 0.085 rev/L

Speed (No Load) 32 - 80 rpm

Approx Press Drop @ 250 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

4 3/4”7/8 2.0Short Radius

Page 114: Nov mud motor handbook

106

®

AB

C

D EAlternate Stator Tube OD Available: 5 in (127 mm)Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 225 in (5.71 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 790 lbs (358 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 2.9 1.9 1.7 2.9 3.1 3.6 1.8 1.8 1.80.78° 6.4 5.4 3.5 6.4 6.0 6.5 5.1 4.7 4.71.15° 9.7 8.7 6.7 9.7 8.8 9.2 8.6 7.6 7.61.50° 12.9 11.8 9.8 12.9 11.8 11.7 11.9 10.5 10.31.83° 15.8 14.8 12.7 15.8 14.8 14.2 15.0 13.6 12.82.12° 18.4 17.4 15.3 18.4 17.4 16.3 17.7 16.4 15.0

**2.25° 19.6 18.5 16.4 19.6 18.5 17.2 19.0 17.6 16.02.38° 20.8 19.7 17.6 20.8 19.7 18.2 20.2 18.8 17.02.60° 22.7 21.6 19.5 22.7 21.6 19.8 22.3 20.9 18.72.77° 24.3 23.1 21.0 24.3 23.1 21.0 23.8 22.5 20.02.89° 25.3 24.2 22.1 25.3 24.2 22.1 25.0 23.6 21.02.97° 26.0 24.9 22.8 26.0 24.9 22.8 25.7 24.4 21.63.00° 26.3 25.2 23.0 26.3 25.2 23.0 26.0 24.6 21.9

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.505.0° 1.50 1.50 1.83 1.50 1.50 1.50 1.15 1.50 1.507.5° 1.15 1.50 1.83 1.15 1.50 1.15 1.15 1.15 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 0.78 0.78 0.78 0.7812.5° 0.78 0.78 1.15 0.78 0.39 0.78 0.39 0.39 0.3915.0° 0.39 0.78 1.15 0.39 0.39 0.39 0.00 0.00 0.0017.5° 0.00 0.39 0.78 0.00 0.00 0.00 - - - 20.0° 0.00 0.00 0.39 - - - - - - 22.5° - 0.00 0.39 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 7/8 2.2 Stage

Page 115: Nov mud motor handbook

107

Performance OutputStd Elastomer Max Diff Pressure 335 psi 2310 kPaStd Elastomer Torque @ Max Pressure 1479 lb-ft 2006 N-mPowerPLUS™ Max Diff Pressure 503 psi 3465 kPaPowerPLUS Torque @ Max Pressure 2219 lb-ft 3009 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 250 gpm 379 - 946 lpm

Revs per Unit Volume (No Load) 0.55 rev/gal 0.145 rev/L

Speed (No Load) 55 - 137 rpm

Approx Press Drop @ 250 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

4 3/4”7/8 2.2

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 116: Nov mud motor handbook

108

®

AB

C

D EAlternate Stator Tube OD Available: 5 in (127 mm)Bit to Center of Stabilizer Blade A 21 in (0.53 m)Bit to Bend B 46 in (1.17 m)Bit to Top Sub C 210 in (5.32 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.56 in (141 mm)Bit to Max Slick OD w/ Straight Housing 6.70 in (170 mm)Estimated Total Weight: 740 lbs (336 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 2.5 1.9 1.8 3.4 3.6 4.2 2.1 2.1 2.10.78° 6.2 4.9 3.6 6.7 6.9 7.4 5.5 5.5 5.51.15° 9.8 8.4 5.8 9.8 10.0 10.5 8.8 8.8 8.81.50° 13.1 11.7 9.1 13.1 13.0 13.4 12.1 11.8 11.81.83° 16.2 14.8 12.1 16.2 15.7 16.1 15.4 14.7 14.72.12° 19.0 17.6 14.8 19.0 18.1 18.5 18.3 17.3 17.3

**2.25° 20.2 18.8 16.1 20.2 19.2 19.6 19.6 18.4 18.42.38° 21.5 20.0 17.3 21.5 20.3 20.7 20.9 19.6 19.52.60° 23.6 22.1 19.3 23.6 22.2 22.5 23.1 21.5 21.52.77° 25.2 23.7 20.9 25.2 23.7 23.9 24.8 23.0 23.02.89° 26.3 24.8 22.0 26.3 24.8 24.9 26.0 24.2 24.02.97° 27.1 25.6 22.8 27.1 25.6 25.5 26.8 25.0 24.73.00° 27.4 25.9 23.0 27.4 25.9 25.8 27.1 25.3 25.0

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.835.0° 1.50 1.50 1.83 1.50 1.83 1.83 1.15 1.50 1.507.5° 1.15 1.50 1.83 1.15 1.50 1.50 1.15 1.15 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 1.15 0.78 0.78 0.7812.5° 0.78 0.78 1.50 0.78 0.78 1.15 0.78 0.78 0.7815.0° 0.39 0.78 1.15 0.39 0.78 0.78 0.39 0.39 0.3917.5° 0.39 0.39 0.78 0.39 0.39 0.39 0.00 0.00 0.0020.0° 0.00 0.39 0.78 0.00 0.00 0.00 - - - 22.5° - 0.00 0.39 - 0.00 0.00 - - - 25.0° - - 0.39 - - - - - - 27.5° - - 0.00 - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an SR3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 7/8 2.2 Stage SR3

Page 117: Nov mud motor handbook

109

Performance OutputStd Elastomer Max Diff Pressure 335 psi 2310 kPaStd Elastomer Torque @ Max Pressure 1479 lb-ft 2006 N-mPowerPLUS™ Max Diff Pressure 503 psi 3465 kPaPowerPLUS Torque @ Max Pressure 2219 lb-ft 3009 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 250 gpm 379 - 946 lpm

Revs per Unit Volume (No Load) 0.55 rev/gal 0.145 rev/L

Speed (No Load) 55 - 137 rpm

Approx Press Drop @ 250 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

4 3/4”7/8 2.2

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Short Radius

Page 118: Nov mud motor handbook

110

®

AB

C

D E

Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 332 in (8.43 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1170 lbs (531 kg)Common Top Connection: 4 1/2 REG, 3 1/2 IFCommon Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.8 1.3 1.2 1.9 2.0 2.3 1.4 1.4 1.40.78° 4.3 3.6 2.5 4.3 4.2 4.5 3.7 3.6 3.61.15° 6.7 6.0 4.6 6.7 6.3 6.5 6.2 5.8 5.81.50° 8.9 8.2 6.8 8.9 8.3 8.5 8.5 7.8 7.81.83° 11.0 10.3 8.9 11.0 10.3 10.3 10.7 9.8 9.72.12° 12.9 12.1 10.7 12.9 12.1 12.0 12.6 11.7 11.4

**2.25° 13.7 13.0 11.5 13.7 13.0 12.7 13.5 12.6 12.22.38° 14.5 13.8 12.4 14.5 13.8 13.4 14.3 13.5 12.92.60° 16.0 15.2 13.7 16.0 15.2 14.6 15.8 14.9 14.22.77° 17.0 16.3 14.8 17.0 16.3 15.6 16.9 16.0 15.22.89° 17.8 17.1 15.6 17.8 17.1 16.2 17.7 16.8 15.92.97° 18.3 17.6 16.1 18.3 17.6 16.7 18.2 17.4 16.33.00° 18.5 17.8 16.3 18.5 17.8 16.9 18.4 17.6 16.5

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.50 1.508.0° 1.15 1.50 1.83 1.15 1.50 1.50 1.15 1.15 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 1.15 0.78 1.15 0.7812.0° 0.78 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3914.0° 0.39 0.39 0.78 0.39 0.39 0.39 0.39 0 016.0° 0 0.39 0.39 0 0 0 0 0 018.0° - 0 0.39 - - - - - - 20.0° - - 0 - - - - - - 22.0° - - - - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 7/8 2.6 Stage

Page 119: Nov mud motor handbook

111

Performance OutputStd Elastomer Max Diff Pressure 390 psi 2689 kPaStd Elastomer Torque @ Max Pressure 3500 lb-ft 4745 N-mPowerPLUS™ Max Diff Pressure 585 psi 4033 kPaPowerPLUS Torque @ Max Pressure 5250 lb-ft 7118 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 150 - 300 gpm 568 - 1136 lpm

Revs per Unit Volume (No Load) 0.27 rev/gal 0.071 rev/L

Speed (No Load) 41 - 81 rpm

Approx Press Drop @ 250 gpm (No Load) 200 psi 1400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

4 3/4”7/8 2.6

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 120: Nov mud motor handbook

112

®

AB

C

D EAlternate Stator Tube OD Available: 5 in (127 mm)Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 353 in (8.96 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1240 lbs (562 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.7 1.2 1.2 1.8 1.9 2.1 1.3 1.3 1.30.78° 4.0 3.4 2.3 4.0 4.0 4.2 3.5 3.5 3.51.15° 6.3 5.6 4.3 6.3 6.0 6.2 5.9 5.5 5.51.50° 8.4 7.7 6.4 8.4 7.9 8.1 8.1 7.5 7.51.83° 10.4 9.7 8.4 10.4 9.7 9.8 10.1 9.3 9.32.12° 12.2 11.5 10.1 12.2 11.5 11.4 11.9 11.1 10.9

**2.25° 13.0 12.3 10.9 13.0 12.3 12.1 12.7 11.9 11.62.38° 13.8 13.1 11.7 13.8 13.1 12.7 13.6 12.7 12.32.60° 15.1 14.4 13.0 15.1 14.4 13.9 14.9 14.1 13.52.77° 16.1 15.4 14.0 16.1 15.4 14.8 16.0 15.2 14.52.89° 16.8 16.1 14.7 16.8 16.1 15.5 16.7 15.9 15.12.97° 17.3 16.6 15.2 17.3 16.6 15.9 17.2 16.4 15.63.00° 17.5 16.8 15.4 17.5 16.8 16.1 17.4 16.6 15.7

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.508.0° 1.15 1.50 1.83 1.15 1.50 1.50 1.15 1.50 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 1.15 0.78 1.15 0.7812.0° 0.78 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3914.0° 0.39 0.39 0.78 0.39 0.39 0.39 0.39 0.00 0.0016.0° 0.00 0.39 0.39 0.00 0.00 0.00 0.00 0.00 - 18.0° - 0.00 0.39 - - - - - - 20.0° - - 0.00 - - - - - - 22.0° - - - - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 7/8 2.9 Stage

Page 121: Nov mud motor handbook

113

Performance OutputStd Elastomer Max Diff Pressure 405 psi 2792 kPaStd Elastomer Torque @ Max Pressure 2791 lb-ft 3784 N-mPowerPLUS™ Max Diff Pressure 608 psi 4189 kPaPowerPLUS Torque @ Max Pressure 4187 lb-ft 5677 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 250 gpm 379 - 946 lpm

Revs per Unit Volume (No Load) 0.33 rev/gal 0.088 rev/L

Speed (No Load) 33 - 83 rpm

Approx Press Drop @ 250 gpm (No Load) 450 psi 3100 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

4 3/4”7/8 2.9

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 122: Nov mud motor handbook

114

®

AB

C

D EAlternate Stator Tube OD Available: 5 in (127 mm)Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 290 in (7.36 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1020 lbs (463 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 2.1 1.4 1.4 2.2 2.4 2.7 1.5 1.5 1.50.78° 4.9 4.1 2.8 4.9 4.8 5.1 4.2 4.0 4.01.15° 7.6 6.8 5.2 7.6 7.1 7.4 7.0 6.4 6.41.50° 10.1 9.3 7.7 10.1 9.3 9.5 9.6 8.6 8.61.83° 12.5 11.7 10.1 12.5 11.7 11.6 12.1 11.0 10.82.12° 14.6 13.8 12.1 14.6 13.8 13.4 14.2 13.2 12.6

**2.25° 15.5 14.7 13.1 15.5 14.7 14.2 15.2 14.2 13.52.38° 16.5 15.6 14.0 16.5 15.6 15.0 16.2 15.2 14.32.60° 18.1 17.2 15.5 18.1 17.2 16.3 17.8 16.8 15.72.77° 19.3 18.4 16.8 19.3 18.4 17.4 19.1 18.1 16.82.89° 20.2 19.3 17.6 20.2 19.3 18.1 20.0 19.0 17.62.97° 20.7 19.9 18.2 20.7 19.9 18.6 20.6 19.6 18.13.00° 21.0 20.1 18.4 21.0 20.1 18.8 20.8 19.8 18.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.836.0° 1.50 1.50 1.83 1.50 1.50 1.50 1.50 1.50 1.508.0° 1.15 1.15 1.83 1.15 1.15 1.15 1.15 1.15 1.15

10.0° 0.78 1.15 1.50 0.78 1.15 1.15 0.78 0.78 0.7812.0° 0.78 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3914.0° 0.39 0.39 0.78 0.39 0.39 0.39 0.39 0.00 0.0016.0° 0.00 0.39 0.78 0.00 0.00 0.00 0.00 0.00 0.0018.0° 0.00 0.00 0.39 - - - - - - 20.0° - 0.00 0.00 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 7/8 3.8 Stage

Page 123: Nov mud motor handbook

115

Performance OutputStd Elastomer Max Diff Pressure 535 psi 3689 kPaStd Elastomer Torque @ Max Pressure 2332 lb-ft 3161 N-mPowerPLUS™ Max Diff Pressure 803 psi 5533 kPaPowerPLUS Torque @ Max Pressure 3497 lb-ft 4742 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 250 gpm 379 - 946 lpm

Revs per Unit Volume (No Load) 0.52 rev/gal 0.138 rev/L

Speed (No Load) 52 - 131 rpm

Approx Press Drop @ 250 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

4 3/4”7/8 3.8

Page 124: Nov mud motor handbook

116

®

AB

C

D EAlternate Stator Tube OD Available: 5 in (127 mm)Bit to Center of Stabilizer Blade A 21 in (0.53 m)Bit to Bend B 46 in (1.17 m)Bit to Top Sub C 275 in (6.97 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.56 in (141 mm)Bit to Max Slick OD w/ Straight Housing 6.70 in (170 mm)Estimated Total Weight: 960 lbs (435 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.8 1.5 1.5 2.5 2.7 3.0 1.7 1.7 1.70.78° 4.8 3.7 2.9 5.2 5.4 5.7 4.5 4.5 4.51.15° 7.6 6.5 4.4 7.8 7.9 8.2 7.1 7.2 7.21.50° 10.2 9.1 7.0 10.2 10.3 10.6 9.6 9.6 9.71.83° 12.7 11.6 9.5 12.7 12.6 12.8 12.2 12.0 12.02.12° 14.9 13.8 11.6 14.9 14.6 14.8 14.5 14.1 14.1

**2.25° 15.9 14.8 12.6 15.9 15.4 15.7 15.5 15.0 15.02.38° 16.9 15.7 13.6 16.9 16.3 16.5 16.5 15.9 15.92.60° 18.5 17.4 15.2 18.5 17.8 18.0 18.3 17.5 17.52.77° 19.8 18.7 16.5 19.8 19.0 19.2 19.6 18.7 18.72.89° 20.7 19.6 17.4 20.7 19.8 20.0 20.5 19.6 19.52.97° 21.3 20.2 18.0 21.3 20.4 20.6 21.2 20.1 20.13.00° 21.5 20.4 18.2 21.5 20.6 20.8 21.4 20.3 20.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.837.5° 1.15 1.50 1.83 1.15 1.50 1.50 1.15 1.50 1.50

10.0° 0.78 1.15 1.50 0.78 1.15 1.15 0.78 1.15 1.1512.5° 0.78 0.78 1.15 0.78 0.78 0.78 0.78 0.78 0.7815.0° 0.39 0.39 0.78 0.39 0.39 0.39 0.39 0.39 0.3917.5° 0.00 0.39 0.78 0.00 0.00 0.39 0.00 0.00 0.0020.0° - 0.00 0.39 - 0.00 0.00 - - - 22.5° - - 0.00 - - - - - - 25.0° - - - - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an SR3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

4 3/4” 7/8 3.8 Stage SR3

Page 125: Nov mud motor handbook

117

Short Radius

Performance OutputStd Elastomer Max Diff Pressure 535 psi 3689 kPaStd Elastomer Torque @ Max Pressure 2332 lb-ft 3161 N-mPowerPLUS™ Max Diff Pressure 803 psi 5533 kPaPowerPLUS Torque @ Max Pressure 3497 lb-ft 4742 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 250 gpm 379 - 946 lpm

Revs per Unit Volume (No Load) 0.52 rev/gal 0.138 rev/L

Speed (No Load) 52 - 131 rpm

Approx Press Drop @ 250 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

4 3/4”7/8 3.8

Page 126: Nov mud motor handbook

118

®

AB

C

D E

Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 288 in (7.31 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1120 lbs (508 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.9 1.4 1.4 2.0 2.2 2.5 1.5 1.5 1.50.78° 4.8 4.0 2.8 4.8 4.7 5.0 4.2 4.0 4.01.15° 7.5 6.6 5.1 7.5 7.0 7.3 7.0 6.4 6.41.50° 10.0 9.2 7.6 10.0 9.2 9.4 9.6 8.7 8.71.83° 12.4 11.6 9.9 12.4 11.6 11.5 12.1 11.1 10.82.12° 14.5 13.7 12.0 14.5 13.7 13.3 14.3 13.3 12.7

**2.25° 15.4 14.6 12.9 15.4 14.6 14.1 15.3 14.3 13.52.38° 16.4 15.5 13.9 16.4 15.5 14.9 16.3 15.3 14.42.60° 18.0 17.1 15.5 18.0 17.1 16.2 17.9 16.9 15.82.77° 19.2 18.4 16.7 19.2 18.4 17.3 19.2 18.2 16.92.89° 20.1 19.2 17.5 20.1 19.2 18.0 20.1 19.1 17.72.97° 20.7 19.8 18.1 20.7 19.8 18.5 20.7 19.7 18.23.00° 20.9 20.0 18.3 20.9 20.0 18.7 20.9 19.9 18.4

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.505.0° 1.83 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.157.5° 1.50 1.83 1.83 1.50 1.83 1.15 1.50 1.83 0.78

10.0° 1.50 1.50 1.83 1.50 0.39 0.78 1.15 0.39 0.3912.5° 1.15 1.15 1.50 1.15 0.00 0.39 0.78 0.00 0.0015.0° 0.78 0.78 1.15 0.78 0.00 0.00 - - - 17.5° 0.39 0.39 0.78 - - - - - - 20.0° 0.00 0.39 0.78 - - - - - - 22.5° - 0.00 0.39 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

5” 6/7 6.0 Stage

Page 127: Nov mud motor handbook

119

Performance OutputStd Elastomer Max Diff Pressure 860 psi 5929 kPaStd Elastomer Torque @ Max Pressure 2372 lb-ft 3216 N-mPowerPLUS™ Max Diff Pressure 1290 psi 8894 kPaPowerPLUS Torque @ Max Pressure 3558 lb-ft 4824 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 200 - 350 gpm 757 - 1325 lpm

Revs per Unit Volume (No Load) 0.87 rev/gal 0.229 rev/L

Speed (No Load) 173 - 303 rpm

Approx Press Drop @ 350 gpm (No Load) 400 psi 2750 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

5”6/7 6.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 128: Nov mud motor handbook

120

®

AB

C

D E

Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 315 in (7.99 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1220 lbs (553 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.7 1.3 1.3 1.9 2.0 2.3 1.4 1.4 1.40.78° 4.4 3.6 2.6 4.4 4.3 4.6 3.9 3.8 3.81.15° 6.8 6.1 4.7 6.8 6.5 6.7 6.5 6.0 6.01.50° 9.2 8.4 7.0 9.2 8.5 8.7 8.9 8.1 8.11.83° 11.4 10.7 9.2 11.4 10.7 10.7 11.2 10.3 10.12.12° 13.4 12.6 11.1 13.4 12.6 12.3 13.2 12.3 11.9

**2.25° 14.2 13.5 11.9 14.2 13.5 13.1 14.1 13.2 12.72.38° 15.1 14.3 12.8 15.1 14.3 13.9 15.0 14.1 13.42.60° 16.6 15.8 14.3 16.6 15.8 15.1 16.6 15.6 14.82.77° 17.7 16.9 15.4 17.7 16.9 16.1 17.7 16.8 15.82.89° 18.5 17.7 16.2 18.5 17.7 16.8 18.6 17.6 16.52.97° 19.1 18.3 16.7 19.1 18.3 17.3 19.1 18.2 17.03.00° 19.3 18.5 16.9 19.3 18.5 17.5 19.3 18.4 17.2

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.157.5° 1.83 1.83 1.83 1.83 0.78 1.15 1.83 1.83 0.78

10.0° 1.50 1.50 1.83 1.50 0.39 0.78 1.50 0.39 0.3912.5° 1.15 1.15 1.50 1.15 0.00 0.39 1.15 0.00 0.0015.0° 0.78 0.78 1.15 - - 0.00 0.78 - - 17.5° 0.39 0.39 0.78 - - - 0.39 - - 20.0° 0.00 0.39 0.39 - - - 0.00 - - 22.5° - 0.00 0.00 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

5” 6/7 7.0 Stage

Page 129: Nov mud motor handbook

121

Performance OutputStd Elastomer Max Diff Pressure 1005 psi 6929 kPaStd Elastomer Torque @ Max Pressure 2895 lb-ft 3926 N-mPowerPLUS™ Max Diff Pressure 1508 psi 10394 kPaPowerPLUS Torque @ Max Pressure 4343 lb-ft 5888 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 200 - 350 gpm 757 - 1325 lpm

Revs per Unit Volume (No Load) 0.86 rev/gal 0.228r ev/L

Speed (No Load) 173 - 302 rpm

Approx Press Drop @ 350 gpm (No Load) 450 psi 3100 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

5”6/7 7.0

Page 130: Nov mud motor handbook

122

®

AB

C

D E

Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 353 in (8.96 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1370 lbs (621 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.5 1.2 1.2 1.7 1.8 2.0 1.3 1.3 1.30.78° 3.9 3.2 2.3 3.9 3.9 4.1 3.5 3.5 3.51.15° 6.2 5.5 4.2 6.2 5.9 6.1 5.9 5.5 5.51.50° 8.3 7.6 6.3 8.3 7.8 7.9 8.1 7.5 7.51.83° 10.3 9.6 8.3 10.3 9.6 9.7 10.1 9.3 9.32.12° 12.0 11.3 10.0 12.0 11.3 11.2 11.9 11.1 10.9

**2.25° 12.8 12.1 10.8 12.8 12.1 11.9 12.7 11.9 11.62.38° 13.6 12.9 11.6 13.6 12.9 12.6 13.6 12.7 12.32.60° 15.0 14.2 12.9 15.0 14.2 13.8 14.9 14.1 13.52.77° 16.0 15.3 13.9 16.0 15.3 14.7 16.0 15.2 14.52.89° 16.7 16.0 14.6 16.7 16.0 15.4 16.7 15.9 15.12.97° 17.2 16.5 15.1 17.2 16.5 15.8 17.2 16.4 15.63.00° 17.4 16.7 15.3 17.4 16.7 15.9 17.4 16.6 15.7

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.507.5° 1.83 1.83 1.83 1.83 1.83 1.15 1.83 1.83 0.78

10.0° 1.50 1.50 1.83 1.50 1.50 0.78 1.50 0.39 0.3912.5° 1.15 1.15 1.50 1.15 0.00 0.00 1.15 0.00 0.0015.0° 0.78 0.78 1.15 - - - 0.78 - - 17.5° 0.39 0.39 0.78 - - - 0.39 - - 20.0° 0.00 0.00 0.39 - - - 0.00 - - 22.5° - - 0.00 - - - - - - 25.0° - - - - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

5” 6/7 8.0 Stage

Page 131: Nov mud motor handbook

123

Performance OutputStd Elastomer Max Diff Pressure 1215 psi 8377 kPaStd Elastomer Torque @ Max Pressure 3500 lb-ft 4746 N-mPowerPLUS™ Max Diff Pressure 1823 psi 12566 kPaPowerPLUS Torque @ Max Pressure 5251 lb-ft 7119 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 150 - 350 gpm 568 - 1325 lpm

Revs per Unit Volume (No Load) 0.86 rev/gal 0.228 rev/L

Speed (No Load) 130 - 302 rpm

Approx Press Drop @ 350 gpm (No Load) 450 psi 3100 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

5”6/7 8.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 132: Nov mud motor handbook

124

®

AB

C

D EAlternate Stator Tube OD Available: 6 1/2 in (165 mm)Bit to Center of Stabilizer Blade A 28 in (0.71 m)Bit to Bend B 77 in (1.96 m)Bit to Top Sub C 328 in (8.33 m)Max OD of Motor at Upset for Stabilizer D 7.38 in (187 mm)Radius @ Adjusting Ring E 3.50 in (89 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.00 in (178 mm)Max OD of Slick Motor w/ Straight Housing 6.63 in (168 mm)Bit to Max Slick OD w/ Straight Housing 8.90 in (226 mm)Estimated Total Weight: 1990 lbs (903 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.39° 1.2 1.2 1.2 2.3 2.6 2.7 1.5 1.6 1.60.78° 3.5 2.4 2.4 4.4 4.6 4.7 3.8 3.8 3.81.15° 5.8 4.5 3.9 6.3 6.6 6.7 5.8 5.8 5.81.50° 8.0 6.6 6.1 8.2 8.5 8.6 7.8 7.8 7.81.83° 10.1 8.7 8.1 10.1 10.2 10.3 9.7 9.7 9.72.12° 11.9 10.5 9.9 11.9 11.8 11.8 11.6 11.3 11.3

**2.25° 12.7 11.3 10.7 12.7 12.5 12.5 12.5 12.1 12.12.38° 13.5 12.1 11.5 13.5 13.1 13.2 13.4 12.8 12.82.60° 14.9 13.4 12.9 14.9 14.3 14.4 14.8 14.0 14.02.77° 15.9 14.5 13.9 15.9 15.2 15.3 16.0 15.0 15.02.89° 16.7 15.2 14.6 16.7 15.9 15.9 16.8 15.7 15.72.97° 17.2 15.7 15.1 17.2 16.3 16.3 17.3 16.1 16.13.00° 17.4 15.9 15.3 17.4 16.4 16.5 17.5 16.3 16.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.83 1.838.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.15 1.50 1.50

10.0° 1.15 1.50 1.50 1.15 1.50 1.50 0.78 1.15 1.1512.0° 0.78 1.15 1.15 0.78 1.15 1.15 0.78 0.78 0.7814.0° 0.39 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3916.0° 0.39 0.78 0.78 0.39 0.39 0.39 0.00 0.00 0.0018.0° 0.00 0.39 0.39 0.00 0.00 0.00 - - - 20.0° - 0.00 0.00 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 1/4” 4/5 7.5 Stage

Page 133: Nov mud motor handbook

125

Performance OutputStd Elastomer Max Diff Pressure 1070 psi 7377 kPaStd Elastomer Torque @ Max Pressure 4065 lb-ft 5511 N-mPowerPLUS™ Max Diff Pressure 1605 psi 11066 kPaPowerPLUS Torque @ Max Pressure 6097 lb-ft 8267 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 150 - 400 gpm 568 - 1514 lpm

Revs per Unit Volume (No Load) 0.69 rev/gal 0.182 rev/L

Speed (No Load) 104 - 276 rpm

Approx Press Drop @ 400 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

6 1/4”4/5 7.5

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 134: Nov mud motor handbook

126

®

AB

C

D EAlternate Stator Tube OD Available: 6 1/8 in (156 mm)Bit to Center of Stabilizer Blade A 28 in (0.71 m)Bit to Bend B 77 in (1.96 m)Bit to Top Sub C 328 in (8.33 m)Max OD of Motor at Upset for Stabilizer D 7.38 in (187 mm)Radius @ Adjusting Ring E 3.50 in (89 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.00 in (178 mm)Max OD of Slick Motor w/ Straight Housing 6.63 in (168 mm)Bit to Max Slick OD w/ Straight Housing 8.90 in (226 mm)Estimated Total Weight: 1990 lbs (903 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.39° 1.2 1.2 1.2 2.3 2.6 2.7 1.5 1.6 1.60.78° 3.5 2.4 2.4 4.4 4.6 4.7 3.8 3.8 3.81.15° 5.8 4.5 3.9 6.3 6.6 6.7 5.8 5.8 5.81.50° 8.0 6.6 6.1 8.2 8.5 8.6 7.8 7.8 7.81.83° 10.1 8.7 8.1 10.1 10.2 10.3 9.7 9.7 9.72.12° 11.9 10.5 9.9 11.9 11.8 11.8 11.6 11.3 11.3

**2.25° 12.7 11.3 10.7 12.7 12.5 12.5 12.5 12.1 12.12.38° 13.5 12.1 11.5 13.5 13.1 13.2 13.4 12.8 12.82.60° 14.9 13.4 12.9 14.9 14.3 14.4 14.8 14.0 14.02.77° 15.9 14.5 13.9 15.9 15.2 15.3 16.0 15.0 15.02.89° 16.7 15.2 14.6 16.7 15.9 15.9 16.8 15.7 15.72.97° 17.2 15.7 15.1 17.2 16.3 16.3 17.3 16.1 16.13.00° 17.4 15.9 15.3 17.4 16.4 16.5 17.5 16.3 16.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.83 1.838.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.15 1.50 1.50

10.0° 1.15 1.50 1.50 1.15 1.50 1.50 0.78 1.15 1.1512.0° 0.78 1.15 1.15 0.78 1.15 1.15 0.78 0.78 0.7814.0° 0.39 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3916.0° 0.39 0.78 0.78 0.39 0.39 0.39 0.00 0.00 0.0018.0° 0.00 0.39 0.39 0.00 0.00 0.00 - - - 20.0° - 0.00 0.00 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 1/4” 5/6 5.5 Stage

Page 135: Nov mud motor handbook

127

Performance OutputStd Elastomer Max Diff Pressure 800 psi 5516 kPaStd Elastomer Torque @ Max Pressure 4675 lb-ft 6339 N-mPowerPLUS™ Max Diff Pressure 1200 psi 8274 kPaPowerPLUS Torque @ Max Pressure 7013 lb-ft 9508 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 200 - 500 gpm 757 - 1893 lpm

Revs per Unit Volume (No Load) 0.46 rev/gal 0.122 rev/L

Speed (No Load) 93 - 232 rpm

Approx Press Drop @ 400 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 1/4”5/6 5.5

Page 136: Nov mud motor handbook

128

®

AB

C

D EAlternate Stator Tube OD Available: 6 1/2 in (165 mm)Bit to Center of Stabilizer Blade A 28 in (0.71 m)Bit to Bend B 77 in (1.96 m)Bit to Top Sub C 255 in (6.47 m)Max OD of Motor at Upset for Stabilizer D 7.38 in (187 mm)Radius @ Adjusting Ring E 3.50 in (89 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.00 in (178 mm)Max OD of Slick Motor w/ Straight Housing 6.63 in (168 mm)Bit to Max Slick OD w/ Straight Housing 8.90 in (226 mm)Estimated Total Weight: 1550 lbs (703 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.39° 1.5 1.5 1.5 2.9 3.4 3.6 1.8 1.8 1.80.78° 4.5 3.0 3.0 5.4 5.8 6.0 4.4 4.4 4.41.15° 7.4 5.7 5.0 7.8 8.2 8.3 6.9 6.9 6.91.50° 10.1 8.3 7.7 10.1 10.4 10.5 9.3 9.3 9.31.83° 12.6 10.9 10.2 12.6 12.4 12.6 12.0 11.5 11.52.12° 14.9 13.1 12.4 14.9 14.3 14.4 14.4 13.4 13.4

**2.25° 15.9 14.1 13.4 15.9 15.1 15.2 15.5 14.3 14.32.38° 16.9 15.1 14.3 16.9 15.9 16.0 16.6 15.2 15.22.60° 18.6 16.7 16.0 18.6 17.3 17.4 18.4 16.7 16.62.77° 19.9 18.0 17.3 19.9 18.3 18.5 19.8 17.8 17.82.89° 20.8 18.9 18.2 20.8 19.1 19.2 20.8 18.6 18.62.97° 21.4 19.6 18.8 21.4 19.6 19.7 21.5 19.1 19.13.00° 21.7 19.8 19.0 21.7 19.8 19.9 21.7 19.3 19.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.83 1.837.5° 1.50 1.83 1.83 1.50 1.50 1.50 1.15 1.50 1.50

10.0° 1.15 1.50 1.83 1.15 1.15 1.15 0.78 0.78 0.7812.5° 0.78 1.15 1.50 0.78 0.78 0.78 0.78 0.39 0.3915.0° 0.39 1.15 1.15 0.39 0.39 0.39 0.39 0.39 0.3917.5° 0.39 0.78 0.78 0.00 0.00 0.39 0.00 0.00 0.0020.0° 0.00 0.39 0.39 - 0.00 0.00 - - - 22.5° - 0.00 0.39 - - - - - - 25.0° - 0.00 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 1/4” 7/8 2.8 Stage

Page 137: Nov mud motor handbook

129

Performance OutputStd Elastomer Max Diff Pressure 425 psi 2930 kPaStd Elastomer Torque @ Max Pressure 2784 lb-ft 3774 N-mPowerPLUS™ Max Diff Pressure 638 psi 4395 kPaPowerPLUS Torque @ Max Pressure 4176 lb-ft 5661 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 150 - 400 gpm 568 - 1514 lpm

Revs per Unit Volume (No Load) 0.33 rev/gal 0.087 rev/L

Speed (No Load) 49 - 131 rpm

Approx Press Drop @ 400 gpm (No Load) 200 psi 1400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 1/4”7/8 2.8

Page 138: Nov mud motor handbook

130

®

AB

C

D EAlternate Stator Tube OD Available: 6 1/2 in (165 mm)Bit to Center of Stabilizer Blade A 28 in (0.71 m)Bit to Bend B 77 in (1.96 m)Bit to Top Sub C 353 in (8.98 m)Max OD of Motor at Upset for Stabilizer D 7.38 in (187 mm)Radius @ Adjusting Ring E 3.50 in (89 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.00 in (178 mm)Max OD of Slick Motor w/ Straight Housing 6.63 in (168 mm)Bit to Max Slick OD w/ Straight Housing 8.90 in (226 mm)Estimated Total Weight: 2150 lbs (975 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.39° 1.2 1.1 1.1 2.1 2.3 2.4 1.5 1.5 1.50.78° 3.2 2.3 2.3 4.1 4.3 4.4 3.6 3.6 3.61.15° 5.4 4.2 3.7 6.0 6.2 6.3 5.5 5.5 5.51.50° 7.5 6.2 5.7 7.7 8.0 8.0 7.4 7.4 7.41.83° 9.4 8.1 7.6 9.4 9.6 9.7 9.2 9.2 9.22.12° 11.1 9.8 9.3 11.1 11.1 11.2 10.9 10.7 10.7

**2.25° 11.9 10.5 10.0 11.9 11.7 11.8 11.7 11.4 11.42.38° 12.6 11.3 10.8 12.6 12.4 12.5 12.5 12.1 12.12.60° 13.9 12.6 12.0 13.9 13.5 13.6 13.9 13.3 13.32.77° 14.9 13.6 13.0 14.9 14.4 14.4 15.0 14.2 14.22.89° 15.6 14.2 13.7 15.6 15.0 15.0 15.7 14.8 14.82.97° 16.1 14.7 14.2 16.1 15.4 15.4 16.2 15.3 15.33.00° 16.3 14.9 14.3 16.3 15.5 15.6 16.4 15.4 15.4

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.83 1.838.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.15 1.50 1.50

10.0° 1.15 1.50 1.50 1.15 1.50 1.50 1.15 1.15 1.1512.0° 0.78 1.15 1.15 0.78 1.15 1.15 0.78 0.78 0.7814.0° 0.39 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3916.0° 0.00 0.39 0.78 0.39 0.39 0.39 0.00 0.00 0.0018.0° 0.00 0.39 0.39 0.00 0.00 0.00 - - - 20.0° - 0.00 0.00 - - - - - - 22.0° - - - - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 1/4” 7/8 2.9 Stage

Page 139: Nov mud motor handbook

131

Performance OutputStd Elastomer Max Diff Pressure 425 psi 2930 kPaStd Elastomer Torque @ Max Pressure 6277 lb-ft 8510 N-mPowerPLUS™ Max Diff Pressure 638 psi 4395 kPaPowerPLUS Torque @ Max Pressure 9415 lb-ft 12765 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 200 - 500 gpm 757 - 1893 lpm

Revs per Unit Volume (No Load) 0.16 rev/gal 0.043 rev/L

Speed (No Load) 33 - 82 rpm

Approx Press Drop @ 500 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 1/4”7/8 2.9

Page 140: Nov mud motor handbook

132

®

AB

C

D EAlternate Stator Tube OD Available: 6 1/2 in (165 mm)Bit to Center of Stabilizer Blade A 28 in (0.71 m)Bit to Bend B 77 in (1.96 m)Bit to Top Sub C 328 in (8.33 m)Max OD of Motor at Upset for Stabilizer D 7.38 in (187 mm)Radius @ Adjusting Ring E 3.50 in (89 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.00 in (178 mm)Max OD of Slick Motor w/ Straight Housing 6.63 in (168 mm)Bit to Max Slick OD w/ Straight Housing 8.90 in (226 mm)Estimated Total Weight: 1990 lbs (903 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.39° 1.2 1.2 1.2 2.3 2.6 2.7 1.5 1.6 1.60.78° 3.5 2.4 2.4 4.4 4.6 4.7 3.8 3.8 3.81.15° 5.8 4.5 3.9 6.3 6.6 6.7 5.8 5.8 5.81.50° 8.0 6.6 6.1 8.2 8.5 8.6 7.8 7.8 7.81.83° 10.1 8.7 8.1 10.1 10.2 10.3 9.7 9.7 9.72.12° 11.9 10.5 9.9 11.9 11.8 11.8 11.6 11.3 11.3

**2.25° 12.7 11.3 10.7 12.7 12.5 12.5 12.5 12.1 12.12.38° 13.5 12.1 11.5 13.5 13.1 13.2 13.4 12.8 12.82.60° 14.9 13.4 12.9 14.9 14.3 14.4 14.8 14.0 14.02.77° 15.9 14.5 13.9 15.9 15.2 15.3 16.0 15.0 15.02.89° 16.7 15.2 14.6 16.7 15.9 15.9 16.8 15.7 15.72.97° 17.2 15.7 15.1 17.2 16.3 16.3 17.3 16.1 16.13.00° 17.4 15.9 15.3 17.4 16.4 16.5 17.5 16.3 16.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.83 1.838.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.15 1.50 1.50

10.0° 1.15 1.50 1.50 1.15 1.50 1.50 0.78 1.15 1.1512.0° 0.78 1.15 1.15 0.78 1.15 1.15 0.78 0.78 0.7814.0° 0.39 0.78 1.15 0.78 0.78 0.78 0.39 0.39 0.3916.0° 0.39 0.78 0.78 0.39 0.39 0.39 0.00 0.00 0.0018.0° 0.00 0.39 0.39 0.00 0.00 0.00 - - - 20.0° - 0.00 0.00 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 1/4” 7/8 4.8 Stage

Page 141: Nov mud motor handbook

133

Performance OutputStd Elastomer Max Diff Pressure 700 psi 4826 kPaStd Elastomer Torque @ Max Pressure 4773 lb-ft 6472 N-mPowerPLUS™ Max Diff Pressure 1050 psi 7239 kPaPowerPLUS Torque @ Max Pressure 7160 lb-ft 9708 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 150 - 400 gpm 568 - 1514 lpm

Revs per Unit Volume (No Load) 0.33 rev/gal 0.087 rev/L

Speed (No Load) 49 - 131 rpm

Approx Press Drop @ 400 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 1/4”7/8 4.8

Page 142: Nov mud motor handbook

134

®

AB

C

D EAlternate Stator Tube OD Available: 6 1/4 in (159 mm)Bit to Center of Stabilizer Blade A 28 in (0.71 m)Bit to Bend B 77 in (1.96 m)Bit to Top Sub C 311 in (7.89 m)Max OD of Motor at Upset for Stabilizer D 7.38 in (187 mm)Radius @ Adjusting Ring E 3.50 in (89 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.00 in (178 mm)Max OD of Slick Motor w/ Straight Housing 6.63 in (168 mm)Bit to Max Slick OD w/ Straight Housing 8.90 in (226 mm)Estimated Total Weight: 2040 lbs (925 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.39° 1.3 1.3 1.3 2.2 2.6 2.7 1.6 1.6 1.60.78° 3.5 2.5 2.5 4.4 4.7 4.8 3.9 3.9 3.91.15° 5.9 4.5 4.0 6.5 6.8 6.9 6.1 6.1 6.11.50° 8.2 6.8 6.2 8.4 8.7 8.8 8.1 8.1 8.11.83° 10.4 8.9 8.4 10.4 10.5 10.6 10.2 10.1 10.12.12° 12.3 10.8 10.2 12.3 12.1 12.2 12.2 11.8 11.8

**2.25° 13.2 11.7 11.1 13.2 12.9 12.9 13.1 12.5 12.52.38° 14.0 12.5 11.9 14.0 13.6 13.7 14.0 13.3 13.32.60° 15.4 13.9 13.3 15.4 14.8 14.9 15.6 14.6 14.62.77° 16.6 15.0 14.4 16.6 15.7 15.8 16.7 15.6 15.62.89° 17.3 15.8 15.2 17.3 16.4 16.5 17.6 16.3 16.32.97° 17.9 16.3 15.7 17.9 16.8 16.9 18.1 16.8 16.83.00° 18.1 16.5 15.9 18.1 17.0 17.1 18.3 16.9 16.9

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.834.0° 1.15 1.50 1.83 1.15 1.50 1.50 1.15 1.50 1.506.0° 0.78 1.15 1.50 1.15 1.15 1.15 1.15 1.15 1.158.0° 0.78 1.15 1.15 0.78 0.78 0.78 0.78 0.78 0.78

10.0° 0.39 0.78 0.78 0.39 0.39 0.78 0.39 0.39 0.3912.0° 0.00 0.39 0.78 0.00 0.39 0.39 0.00 0.00 0.0014.0° 0.00 0.39 0.39 0.00 0.00 0.00 - - - 16.0° - 0.00 0.00 - - - - - - 18.0° - - 0.00 - - - - - - 20.0° - - - - - - - - - 22.0° - - - - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 1/2” 1/2 4.0 Stage

Page 143: Nov mud motor handbook

135

Performance OutputStd Elastomer Max Diff Pressure 480 psi 3309 kPaStd Elastomer Torque @ Max Pressure 1296 lb-ft 1757 N-mPowerPLUS™ Max Diff Pressure 720 psi 4964 kPaPowerPLUS Torque @ Max Pressure 1944 lb-ft 2636 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 200 - 500 gpm 757 - 1893 lpm

Revs per Unit Volume (No Load) 1.07 rev/gal 0.283 rev/L

Speed (No Load) 214 - 535 rpm

Approx Press Drop @ 500 gpm (No Load) 200 psi 1400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 1/2”1/2 4.0

Page 144: Nov mud motor handbook

136

®

AB

C

D E

Bit to Center of Stabilizer Blade A 28 in (0.71 m)Bit to Bend B 77 in (1.96 m)Bit to Top Sub C 295 in (7.48 m)Max OD of Motor at Upset for Stabilizer D 7.38 in (187 mm)Radius @ Adjusting Ring E 3.50 in (89 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.00 in (178 mm)Max OD of Slick Motor w/ Straight Housing 6.63 in (168 mm)Bit to Max Slick OD w/ Straight Housing 8.90 in (226 mm)Estimated Total Weight: 1940 lbs (880 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.39° 1.3 1.3 1.3 2.4 2.7 2.9 1.7 1.7 1.70.78° 3.7 2.6 2.6 4.6 5.0 5.1 4.0 4.0 4.01.15° 6.2 4.8 4.2 6.8 7.1 7.2 6.3 6.3 6.31.50° 8.6 7.1 6.5 8.8 9.1 9.2 8.4 8.4 8.41.83° 10.9 9.4 8.8 10.9 11.0 11.1 10.6 10.4 10.42.12° 12.9 11.3 10.7 12.9 12.6 12.7 12.8 12.2 12.2

**2.25° 13.8 12.2 11.6 13.8 13.4 13.5 13.7 13.0 13.02.38° 14.7 13.1 12.5 14.7 14.1 14.2 14.7 13.8 13.82.60° 16.2 14.6 13.9 16.2 15.4 15.5 16.3 15.1 15.12.77° 17.3 15.7 15.1 17.3 16.4 16.4 17.5 16.2 16.22.89° 18.2 16.5 15.9 18.2 17.0 17.1 18.4 16.9 16.92.97° 18.7 17.1 16.4 18.7 17.5 17.6 19.0 17.4 17.43.00° 18.9 17.3 16.6 18.9 17.7 17.7 19.2 17.6 17.6

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.834.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.15 1.50 1.506.0° 1.15 1.50 1.50 1.15 1.50 1.50 1.15 1.15 1.158.0° 0.78 1.15 1.50 1.15 1.15 1.15 0.78 0.78 0.78

10.0° 0.78 1.15 1.15 0.78 0.78 0.78 0.39 0.39 0.3912.0° 0.39 0.78 0.78 0.39 0.39 0.39 0.39 0.39 0.3914.0° 0.00 0.39 0.78 0.00 0.39 0.39 0.00 0.00 0.0016.0° 0.00 0.39 0.39 0.00 0.00 0.00 - - - 18.0° - 0.00 0.00 - - - - - - 20.0° - - 0.00 - - - - - - 22.0° - - - - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 1/2” 8/9 4.0 Stage

Page 145: Nov mud motor handbook

137

Performance OutputStd Elastomer Max Diff Pressure 605 psi 4171 kPaStd Elastomer Torque @ Max Pressure 4674 lb-ft 6337 N-mPowerPLUS™ Max Diff Pressure 908 psi 6257 kPaPowerPLUS Torque @ Max Pressure 7010 lb-ft 9505 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 200 - 500 gpm 757 - 1893 lpm

Revs per Unit Volume (No Load) 0.29 rev/gal 0.077 rev/L

Speed (No Load) 58 - 145 rpm

Approx Press Drop @ 500 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 1/2”8/9 4.0

Page 146: Nov mud motor handbook

138

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 324 in (8.22 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2290 lbs (1039 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.2 1.2 1.2 2.2 2.4 2.9 1.5 1.5 1.50.78° 3.2 2.7 2.4 4.3 4.4 4.9 3.7 3.7 3.71.15° 5.5 5.0 3.5 6.3 6.4 6.8 5.8 5.8 5.81.50° 7.7 7.2 4.8 8.2 8.3 8.7 7.8 7.8 7.81.83° 9.8 9.2 6.8 9.9 10.0 10.4 9.6 9.6 9.62.12° 11.6 11.0 8.5 11.6 11.5 11.9 11.4 11.3 11.2

**2.25° 12.4 11.8 9.3 12.4 12.2 12.6 12.3 12.0 12.02.38° 13.2 12.7 10.1 13.2 12.9 13.3 13.1 12.7 12.72.60° 14.6 14.0 11.5 14.6 14.1 14.4 14.6 14.0 13.92.77° 15.7 15.1 12.5 15.7 15.1 15.3 15.7 15.0 14.92.89° 16.4 15.8 13.2 16.4 15.8 15.9 16.6 15.8 15.62.97° 16.9 16.3 13.7 16.9 16.3 16.3 17.1 16.3 16.03.00° 17.1 16.5 13.9 17.1 16.5 16.5 17.3 16.5 16.2

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.50 1.507.5° 1.50 1.50 1.83 1.50 1.15 1.50 1.50 1.15 1.15

10.0° 1.15 1.15 1.83 0.78 0.78 0.78 0.78 0.78 0.3912.5° 0.78 0.78 1.50 0.39 0.39 0.39 0.00 0.00 0.0015.0° 0.39 0.39 1.15 0.00 0.00 0.00 - - - 17.5° 0.00 0.39 0.78 - - - - - - 20.0° - 0.00 0.39 - - - - - - 22.5° - - 0.00 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 2/3 7.0 Stage

Page 147: Nov mud motor handbook

139

Theoretical Performance Curve

Performance OutputStd Elastomer Max Diff Pressure 945 psi 6516 kPaStd Elastomer Torque @ Max Pressure 2933 lb-ft 3977 N-mPowerPLUS™ Max Diff Pressure 1418 psi 9773 kPaPowerPLUS Torque @ Max Pressure 4400 lb-ft 5965 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.85 rev/gal 0.225 rev/L

Speed (No Load) 255 - 510 rpm

Approx Press Drop @ 600 gpm (No Load) 200 psi 1400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

6 3/4”2/3 7.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 148: Nov mud motor handbook

140

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 277 in (7.04 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 1960 lbs (889 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.4 1.4 1.4 2.6 2.8 3.4 1.6 1.6 1.60.78° 3.8 3.1 2.7 4.9 5.1 5.7 4.1 4.1 4.11.15° 6.4 5.8 4.0 7.1 7.3 7.8 6.4 6.4 6.41.50° 8.9 8.2 5.5 9.2 9.3 9.9 8.6 8.6 8.61.83° 11.2 10.6 7.8 11.2 11.3 11.8 10.7 10.7 10.72.12° 13.3 12.6 9.8 13.3 13.0 13.4 12.9 12.5 12.5

**2.25° 14.2 13.6 10.7 14.2 13.7 14.2 13.9 13.3 13.32.38° 15.2 14.5 11.6 15.2 14.5 14.9 14.9 14.1 14.12.60° 16.7 16.0 13.1 16.7 16.0 16.2 16.7 15.7 15.52.77° 17.9 17.2 14.3 17.9 17.2 17.2 18.0 17.1 16.62.89° 18.8 18.1 15.1 18.8 18.1 17.9 18.9 18.0 17.32.97° 19.3 18.7 15.7 19.3 18.7 18.3 19.5 18.6 17.83.00° 19.6 18.9 15.9 19.6 18.9 18.5 19.7 18.8 18.0

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.83 1.50 1.83 1.50 1.83 1.507.5° 1.50 1.50 1.83 1.50 1.15 1.15 0.78 0.78 0.78

10.0° 1.15 1.50 1.83 0.78 0.78 0.78 0.39 0.39 0.3912.5° 0.78 1.15 1.83 0.39 0.39 0.39 0.00 0.00 0.0015.0° 0.39 0.78 1.50 0.00 0.00 0.00 - - - 17.5° 0.39 0.39 1.15 - - - - - - 20.0° 0.00 0.00 0.78 - - - - - - 22.5° - 0.00 0.39 - - - - - - 25.0° - - 0.39 - - - - - - 27.5° - - 0.00 - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 4/5 4.8 Stage

Page 149: Nov mud motor handbook

141

Performance OutputStd Elastomer Max Diff Pressure 695 psi 4792 kPaStd Elastomer Torque @ Max Pressure 3394 lb-ft 4602 N-mPowerPLUS™ Max Diff Pressure 1043 psi 7188 kPaPowerPLUS Torque @ Max Pressure 5092 lb-ft 6903 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.51 rev/gal 0.134 rev/L

Speed (No Load) 152 - 304 rpm

Approx Press Drop @ 600 gpm (No Load) 200 psi 1400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

6 3/4”4/5 4.8

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 150: Nov mud motor handbook

142

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 338 in (8.59 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2400 lbs (1089 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.2 1.2 1.2 2.1 2.2 2.7 1.4 1.4 1.50.78° 3.1 2.6 2.3 4.2 4.3 4.7 3.6 3.6 3.61.15° 5.3 4.8 3.4 6.1 6.2 6.6 5.6 5.6 5.61.50° 7.4 6.9 4.6 7.9 8.0 8.3 7.5 7.5 7.51.83° 9.4 8.9 6.5 9.6 9.7 10.0 9.3 9.3 9.32.12° 11.2 10.6 8.2 11.2 11.2 11.5 11.0 10.9 10.9

**2.25° 11.9 11.4 9.0 11.9 11.8 12.1 11.8 11.6 11.62.38° 12.7 12.2 9.8 12.7 12.5 12.8 12.6 12.3 12.32.60° 14.0 13.5 11.0 14.0 13.6 13.9 14.1 13.5 13.52.77° 15.1 14.5 12.0 15.1 14.5 14.8 15.2 14.5 14.42.89° 15.8 15.2 12.8 15.8 15.2 15.4 15.9 15.2 15.12.97° 16.3 15.7 13.2 16.3 15.7 15.8 16.4 15.7 15.53.00° 16.5 15.9 13.4 16.5 15.9 15.9 16.6 15.9 15.7

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.507.5° 1.50 1.83 1.83 1.15 1.15 1.50 1.50 1.15 1.15

10.0° 1.15 1.15 1.83 0.78 0.78 0.78 0.78 0.78 0.7812.5° 0.78 0.78 1.50 0.39 0.39 0.39 0.00 0.00 0.0015.0° 0.39 0.39 1.15 0.00 0.00 0.00 - - - 17.5° 0.00 0.00 0.78 - - - - - - 20.0° - 0.00 0.39 - - - - - - 22.5° - - 0.00 - - - - - - 25.0° - - - - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 4/5 7.0 Stage

Page 151: Nov mud motor handbook

143

Performance OutputStd Elastomer Max Diff Pressure 1015 psi 6998 kPaStd Elastomer Torque @ Max Pressure 4820 lb-ft 6535 N-mPowerPLUS™ Max Diff Pressure 1523 psi 10497 kPaPowerPLUS Torque @ Max Pressure 7230 lb-ft 9803 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.52 rev/gal 0.137 rev/L

Speed (No Load) 155 - 311 rpm

Approx Press Drop @ 600 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

6 3/4”4/5 7.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 152: Nov mud motor handbook

144

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 351 in (8.90 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2480 lbs (1125 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.1 1.1 1.1 2.1 2.2 2.6 1.4 1.4 1.40.78° 3.0 2.5 2.2 4.0 4.1 4.5 3.5 3.5 3.51.15° 5.1 4.6 3.3 5.9 6.0 6.4 5.5 5.5 5.51.50° 7.2 6.7 4.4 7.7 7.7 8.1 7.3 7.3 7.31.83° 9.1 8.6 6.3 9.3 9.4 9.7 9.1 9.1 9.12.12° 10.8 10.3 8.0 10.8 10.9 11.2 10.6 10.6 10.6

**2.25° 11.6 11.0 8.7 11.6 11.5 11.8 11.4 11.3 11.32.38° 12.3 11.8 9.5 12.3 12.2 12.4 12.3 12.0 12.02.60° 13.6 13.1 10.7 13.6 13.3 13.5 13.6 13.2 13.22.77° 14.6 14.1 11.7 14.6 14.1 14.4 14.7 14.1 14.12.89° 15.3 14.8 12.4 15.3 14.8 15.0 15.4 14.8 14.72.97° 15.8 15.2 12.8 15.8 15.2 15.4 15.9 15.3 15.13.00° 15.9 15.4 13.0 15.9 15.4 15.5 16.1 15.4 15.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.83 1.83 1.83 1.83 1.50 1.50 1.50 1.50 1.508.0° 1.50 1.50 1.83 1.50 1.15 1.15 1.50 1.15 1.1510.0° 1.15 1.15 1.83 0.78 0.78 0.78 0.78 0.78 0.7812.0° 0.78 1.15 1.50 0.39 0.39 0.39 0.39 0.39 0.3914.0° 0.39 0.78 1.15 0.00 0.00 0.00 0.00 0.00 0.0016.0° 0.39 0.39 1.15 - - 0.00 - - - 18.0° 0.00 0.00 0.78 - - - - - - 20.0° - - 0.39 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 5/6 6.8 Stage

Page 153: Nov mud motor handbook

145

Theoretical Performance Curve

Performance OutputStd Elastomer Max Diff Pressure 970 psi 6688 kPaStd Elastomer Torque @ Max Pressure 6039 lb-ft 8188 N-mPowerPLUS™ Max Diff Pressure 1455 psi 10032 kPaPowerPLUS Torque @ Max Pressure 9059 lb-ft 12282 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.41 rev/gal 0.108 rev/L

Speed (No Load) 123 - 246 rpm

Approx Press Drop @ 600 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

6 3/4”5/6 6.8

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 154: Nov mud motor handbook

146

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 324 in (8.22 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2290 lbs (1039 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.2 1.2 1.2 2.2 2.4 2.9 1.5 1.5 1.50.78° 3.2 2.7 2.4 4.3 4.4 4.9 3.7 3.7 3.71.15° 5.5 5.0 3.5 6.3 6.4 6.8 5.8 5.8 5.81.50° 7.7 7.2 4.8 8.2 8.3 8.7 7.8 7.8 7.81.83° 9.8 9.2 6.8 9.9 10.0 10.4 9.6 9.6 9.62.12° 11.6 11.0 8.5 11.6 11.5 11.9 11.4 11.3 11.2

**2.25° 12.4 11.8 9.3 12.4 12.2 12.6 12.3 12.0 12.02.38° 13.2 12.7 10.1 13.2 12.9 13.3 13.1 12.7 12.72.60° 14.6 14.0 11.5 14.6 14.1 14.4 14.6 14.0 13.92.77° 15.7 15.1 12.5 15.7 15.1 15.3 15.7 15.0 14.92.89° 16.4 15.8 13.2 16.4 15.8 15.9 16.6 15.8 15.62.97° 16.9 16.3 13.7 16.9 16.3 16.3 17.1 16.3 16.03.00° 17.1 16.5 13.9 17.1 16.5 16.5 17.3 16.5 16.2

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.50 1.507.5° 1.50 1.50 1.83 1.50 1.15 1.50 1.50 1.15 1.1510.0° 1.15 1.15 1.83 0.78 0.78 0.78 0.78 0.78 0.3912.5° 0.78 0.78 1.50 0.39 0.39 0.39 0.00 0.00 0.0015.0° 0.39 0.39 1.15 0.00 0.00 0.00 - - - 17.5° 0.00 0.39 0.78 - - - - - - 20.0° - 0.00 0.39 - - - - - - 22.5° - - 0.00 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 6/7 5.0 Stage

Page 155: Nov mud motor handbook

147

Performance OutputStd Elastomer Max Diff Pressure 715 psi 4930 kPaStd Elastomer Torque @ Max Pressure 5699 lb-ft 7726 N-mPowerPLUS™ Max Diff Pressure 1073 psi 7395 kPaPowerPLUS Torque @ Max Pressure 8548 lb-ft 11589 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.31 rev/gal 0.082 rev/L

Speed (No Load) 93 - 186 rpm

Approx Press Drop @ 600 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

6 3/4”6/7 5.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 156: Nov mud motor handbook

148

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 374 in (9.49 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2650 lbs (1202 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.1 1.1 1.1 1.9 2.0 2.4 1.3 1.3 1.40.78° 2.8 2.3 2.1 3.8 3.9 4.3 3.3 3.3 3.31.15° 4.8 4.4 3.1 5.6 5.7 6.0 5.2 5.2 5.21.50° 6.8 6.3 4.2 7.3 7.4 7.7 7.0 7.0 7.01.83° 8.6 8.1 6.0 8.9 8.9 9.2 8.7 8.7 8.72.12° 10.2 9.7 7.5 10.3 10.3 10.6 10.1 10.1 10.1

**2.25° 10.9 10.4 8.2 10.9 11.0 11.2 10.8 10.8 10.82.38° 11.6 11.1 8.9 11.6 11.6 11.8 11.6 11.5 11.42.60° 12.9 12.4 10.1 12.9 12.6 12.9 12.9 12.6 12.62.77° 13.8 13.3 11.0 13.8 13.4 13.7 13.9 13.4 13.42.89° 14.5 13.9 11.7 14.5 14.0 14.2 14.6 14.1 14.02.97° 14.9 14.4 12.1 14.9 14.4 14.6 15.1 14.5 14.43.00° 15.1 14.6 12.3 15.1 14.6 14.8 15.3 14.6 14.6

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.50 1.508.0° 1.50 1.50 1.83 1.15 1.15 1.15 1.50 1.15 1.1510.0° 1.15 1.15 1.83 0.78 0.78 0.78 0.78 0.78 0.7812.0° 0.78 1.15 1.50 0.39 0.39 0.39 0.39 0.39 0.3914.0° 0.39 0.78 1.15 0.00 0.00 0.00 0.00 0.00 0.0016.0° 0.00 0.39 0.78 - - - - - - 18.0° 0.00 0.00 0.78 - - - - - - 20.0° - - 0.39 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 6/7 6.0 Stage

Page 157: Nov mud motor handbook

149

Performance OutputStd Elastomer Max Diff Pressure 925 psi 6378 kPaStd Elastomer Torque @ Max Pressure 7708 lb-ft 10451 N-mPowerPLUS™ Max Diff Pressure 1388 psi 9566 kPaPowerPLUS Torque @ Max Pressure 11562 lb-ft 15676 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.31 rev/gal 0.082 rev/L

Speed (No Load) 93 - 186 rpm

Approx Press Drop @ 600 gpm (No Load) 400 psi 2750 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 3/4”6/7 6.0

Page 158: Nov mud motor handbook

150

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 277 in (7.04 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 1960 lbs (889 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.4 1.4 1.4 2.6 2.8 3.4 1.6 1.6 1.60.78° 3.8 3.1 2.7 4.9 5.1 5.7 4.1 4.1 4.11.15° 6.4 5.8 4.0 7.1 7.3 7.8 6.4 6.4 6.41.50° 8.9 8.2 5.5 9.2 9.3 9.9 8.6 8.6 8.61.83° 11.2 10.6 7.8 11.2 11.3 11.8 10.7 10.7 10.72.12° 13.3 12.6 9.8 13.3 13.0 13.4 12.9 12.5 12.5

**2.25° 14.2 13.6 10.7 14.2 13.7 14.2 13.9 13.3 13.32.38° 15.2 14.5 11.6 15.2 14.5 14.9 14.9 14.1 14.12.60° 16.7 16.0 13.1 16.7 16.0 16.2 16.7 15.7 15.52.77° 17.9 17.2 14.3 17.9 17.2 17.2 18.0 17.1 16.62.89° 18.8 18.1 15.1 18.8 18.1 17.9 18.9 18.0 17.32.97° 19.3 18.7 15.7 19.3 18.7 18.3 19.5 18.6 17.83.00° 19.6 18.9 15.9 19.6 18.9 18.5 19.7 18.8 18.0

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.83 1.50 1.83 1.50 1.83 1.507.5° 1.50 1.50 1.83 1.50 1.15 1.15 0.78 0.78 0.78

10.0° 1.15 1.50 1.83 0.78 0.78 0.78 0.39 0.39 0.3912.5° 0.78 1.15 1.83 0.39 0.39 0.39 0.00 0.00 0.0015.0° 0.39 0.78 1.50 0.00 0.00 0.00 - - - 17.5° 0.39 0.39 1.15 - - - - - - 20.0° 0.00 0.00 0.78 - - - - - - 22.5° - 0.00 0.39 - - - - - - 25.0° - - 0.39 - - - - - - 27.5° - - 0.00 - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 7/8 2.0 Stage

Page 159: Nov mud motor handbook

151

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 3/4”7/8 2.0

Performance OutputStd Elastomer Max Diff Pressure 280 psi 1931 kPaStd Elastomer Torque @ Max Pressure 4051 lb-ft 5492 N-mPowerPLUS™ Max Diff Pressure 420 psi 2896 kPaPowerPLUS Torque @ Max Pressure 6077 lb-ft 8239 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 200 - 500 gpm 757 - 1893 lpm

Revs per Unit Volume (No Load) 0.17 rev/gal 0.046 rev/L

Speed (No Load) 35 - 87 rpm

Approx Press Drop @ 500 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

Page 160: Nov mud motor handbook

152

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 344 in (8.72 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2440 lbs (1107 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.2 1.2 1.1 2.1 2.2 2.7 1.4 1.4 1.40.78° 3.0 2.5 2.3 4.1 4.2 4.6 3.5 3.5 3.51.15° 5.2 4.7 3.3 6.0 6.1 6.5 5.5 5.5 5.51.50° 7.3 6.8 4.5 7.8 7.9 8.2 7.4 7.4 7.41.83° 9.3 8.7 6.4 9.5 9.5 9.9 9.2 9.2 9.22.12° 11.0 10.5 8.1 11.0 11.0 11.3 10.8 10.8 10.8

**2.25° 11.8 11.2 8.9 11.8 11.7 12.0 11.6 11.5 11.52.38° 12.5 12.0 9.6 12.5 12.4 12.6 12.5 12.2 12.22.60° 13.9 13.3 10.9 13.9 13.5 13.8 13.9 13.4 13.42.77° 14.9 14.3 11.9 14.9 14.3 14.6 15.0 14.3 14.32.89° 15.6 15.0 12.6 15.6 15.0 15.2 15.7 15.0 14.92.97° 16.1 15.5 13.0 16.1 15.5 15.6 16.2 15.5 15.43.00° 16.2 15.7 13.2 16.2 15.7 15.8 16.4 15.7 15.5

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.507.5° 1.50 1.83 1.83 1.15 1.15 1.50 1.50 1.15 1.15

10.0° 1.15 1.15 1.83 0.78 0.78 0.78 0.78 0.78 0.7812.5° 0.78 0.78 1.50 0.39 0.39 0.39 0.00 0.00 0.0015.0° 0.39 0.39 1.15 0.00 0.00 0.00 - - - 17.5° 0.00 0.00 0.78 - - - - - - 20.0° - - 0.39 - - - - - - 22.5° - - 0.00 - - - - - - 25.0° - - - - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 7/8 2.9 Stage

Page 161: Nov mud motor handbook

153

Performance OutputStd Elastomer Max Diff Pressure 425 psi 2930 kPaStd Elastomer Torque @ Max Pressure 6135 lb-ft 8318 N-mPowerPLUS™ Max Diff Pressure 638 psi 4395 kPaPowerPLUS Torque @ Max Pressure 9202 lb-ft 12477 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 200 - 500 gpm 757 - 1893 lpm

Revs per Unit Volume (No Load) 0.17 rev/gal 0.044 rev/L

Speed (No Load) 34 - 84 rpm

Approx Press Drop @ 500 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 3/4”7/8 2.9

Page 162: Nov mud motor handbook

154

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 255 in (6.46 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 1800 lbs (816 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.5 1.5 1.5 2.9 3.0 3.8 1.7 1.7 1.70.78° 4.1 3.4 2.9 5.3 5.5 6.2 4.3 4.3 4.31.15° 6.9 6.2 4.3 7.6 7.8 8.4 6.7 6.7 6.71.50° 9.6 8.9 5.9 9.8 9.9 10.6 9.1 9.1 9.11.83° 12.1 11.4 8.4 12.1 12.0 12.6 11.4 11.3 11.22.12° 14.3 13.6 10.5 14.3 13.8 14.3 13.8 13.2 13.2

**2.25° 15.3 14.6 11.5 15.3 14.6 15.1 14.9 14.0 14.02.38° 16.3 15.6 12.4 16.3 15.6 15.9 16.0 15.0 14.92.60° 18.0 17.2 14.1 18.0 17.2 17.2 17.9 16.8 16.32.77° 19.3 18.5 15.3 19.3 18.5 18.3 19.3 18.3 17.52.89° 20.2 19.4 16.2 20.2 19.4 19.0 20.3 19.3 18.32.97° 20.8 20.0 16.8 20.8 20.0 19.5 20.9 19.9 18.83.00° 21.0 20.3 17.0 21.0 20.3 19.7 21.2 20.2 19.0

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.506.0° 1.50 1.83 1.83 1.50 1.50 1.50 1.50 1.15 1.159.0° 1.15 1.50 1.83 0.78 0.78 1.15 0.78 0.78 0.78

12.0° 1.15 1.15 1.83 0.39 0.39 0.78 0.39 0.39 0.0015.0° 0.78 0.78 1.50 0.00 0.00 0.39 - - - 18.0° 0.39 0.39 1.15 - - 0.00 - - - 21.0° 0.00 0.00 0.78 - - - - - - 24.0° - - 0.39 - - - - - - 27.0° - - 0.39 - - - - - - 30.0° - - 0.00 - - - - - - 33.0° - - - - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 7/8 3.0 Stage

Page 163: Nov mud motor handbook

155

Performance OutputStd Elastomer Max Diff Pressure 460 psi 3172 kPaStd Elastomer Torque @ Max Pressure 3830 lb-ft 5193 N-mPowerPLUS™ Max Diff Pressure 690 psi 4757 kPaPowerPLUS Torque @ Max Pressure 5745 lb-ft 7789 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.29 rev/gal 0.076 rev/L

Speed (No Load) 86 - 172 rpm

Approx Press Drop @ 600 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 3/4”7/8 3.0

Page 164: Nov mud motor handbook

156

®

AB

C

D E

Bit to Center of Stabilizer Blade A 25 in (0.63 m)Bit to Bend B 55 in (1.40 m)Bit to Top Sub C 234 in (5.94 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.63 in (194 mm)Max OD of Slick Motor w/ Straight Housing 7.63 in (194 mm)Bit to Max Slick OD w/ Straight Housing 0.00 in (0 mm)Estimated Total Weight: 1660 lbs (753 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.6 1.6 1.6 3.4 3.6 4.5 2.1 2.1 2.10.78° 3.5 3.2 3.1 6.3 6.4 7.2 5.2 5.2 5.21.15° 6.5 5.6 4.6 8.9 9.1 9.8 8.1 8.1 8.11.50° 9.4 8.4 6.0 11.5 11.6 12.3 10.8 10.8 10.81.83° 12.1 11.1 7.3 13.9 14.0 14.6 13.4 13.4 13.42.12° 14.4 13.4 9.2 16.0 16.1 16.7 15.7 15.7 15.6

**2.25° 15.5 14.5 10.3 16.9 17.0 17.6 16.7 16.7 16.72.38° 16.6 15.6 11.3 17.8 18.0 18.5 17.7 17.7 17.72.60° 18.3 17.3 13.0 19.4 19.5 20.0 19.5 19.4 19.42.77° 19.7 18.7 14.4 20.7 20.8 21.2 20.8 20.8 20.72.89° 20.7 19.7 15.3 21.5 21.6 22.1 21.7 21.7 21.72.97° 21.4 20.3 16.0 22.1 22.2 22.6 22.4 22.3 22.33.00° 21.6 20.6 16.2 22.3 22.4 22.8 22.6 22.6 22.5

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.50 1.506.0° 1.83 1.83 1.83 1.50 1.50 1.50 1.15 1.15 1.159.0° 1.50 1.50 1.83 1.15 1.15 1.15 0.78 0.78 0.78

12.0° 1.15 1.15 1.83 0.78 0.78 0.78 0.39 0.39 0.3915.0° 0.78 0.78 1.83 0.39 0.39 0.39 0.00 0.00 0.0018.0° 0.39 0.78 1.50 0.00 0.00 0.00 - - - 21.0° 0.00 0.39 1.15 - - - - - - 24.0° 0.00 0.00 0.78 - - - - - - 27.0° - - 0.39 - - - - - - 30.0° - - 0.39 - - - - - - 33.0° - - 0.00 - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an SR3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 7/8 3.0 Stage SR3

Page 165: Nov mud motor handbook

157

Short Radius

Performance OutputStd Elastomer Max Diff Pressure 460 psi 3172 kPaStd Elastomer Torque @ Max Pressure 3830 lb-ft 5193 N-mPowerPLUS™ Max Diff Pressure 690 psi 4757 kPaPowerPLUS Torque @ Max Pressure 5745 lb-ft 7789 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.29 rev/gal 0.076 rev/L

Speed (No Load) 86 - 172 rpm

Approx Press Drop @ 600 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

6 3/4”7/8 3.0

Page 166: Nov mud motor handbook

158

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 318 in (8.06 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2250 lbs (1021 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.2 1.2 1.2 2.3 2.4 2.9 1.5 1.5 1.50.78° 3.3 2.7 2.4 4.4 4.5 5.0 3.7 3.7 3.71.15° 5.6 5.1 3.6 6.4 6.5 7.0 5.8 5.8 5.91.50° 7.9 7.3 4.8 8.3 8.4 8.8 7.9 7.9 7.91.83° 10.0 9.4 6.9 10.1 10.2 10.5 9.7 9.7 9.72.12° 11.8 11.2 8.7 11.8 11.7 12.1 11.6 11.4 11.4

**2.25° 12.6 12.0 9.5 12.6 12.4 12.8 12.4 12.1 12.12.38° 13.5 12.9 10.3 13.5 13.1 13.5 13.3 12.9 12.92.60° 14.8 14.2 11.7 14.8 14.3 14.6 14.8 14.2 14.12.77° 15.9 15.3 12.7 15.9 15.3 15.5 16.0 15.2 15.12.89° 16.7 16.1 13.5 16.7 16.1 16.1 16.8 16.1 15.82.97° 17.2 16.6 14.0 17.2 16.6 16.6 17.4 16.6 16.23.00° 17.4 16.8 14.1 17.4 16.8 16.7 17.6 16.8 16.4

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.50 1.507.5° 1.50 1.50 1.83 1.50 1.15 1.50 1.50 1.15 1.15

10.0° 1.15 1.15 1.83 0.78 0.78 0.78 0.78 0.78 0.3912.5° 0.78 0.78 1.50 0.39 0.39 0.39 0.00 0.00 0.0015.0° 0.39 0.78 1.15 0.00 0.00 0.00 - - - 17.5° 0.00 0.39 0.78 - - - - - - 20.0° - 0.00 0.39 - - - - - - 22.5° - - 0.39 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 7/8 5.0 Stage

Page 167: Nov mud motor handbook

159

Performance OutputStd Elastomer Max Diff Pressure 720 psi 4964 kPaStd Elastomer Torque @ Max Pressure 5972 lb-ft 8097 N-mPowerPLUS™ Max Diff Pressure 1080 psi 7446 kPaPowerPLUS Torque @ Max Pressure 8959 lb-ft 12146 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.29 rev/gal 0.077 rev/L

Speed (No Load) 87 - 174 rpm

Approx Press Drop @ 600 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

6 3/4”7/8 5.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 168: Nov mud motor handbook

160

®

AB

C

D EAlternate Stator Tube OD Available: 6 1/2 in (165 mm)Bit to Center of Stabilizer Blade A 25 in (0.63 m)Bit to Bend B 55 in (1.40 m)Bit to Top Sub C 297 in (7.54 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.63 in (194 mm)Max OD of Slick Motor w/ Straight Housing 7.63 in (194 mm)Bit to Max Slick OD w/ Straight Housing 0.00 in (0 mm)Estimated Total Weight: 2100 lbs (953 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.3 1.3 1.3 2.6 2.8 3.4 1.8 1.8 1.80.78° 2.7 2.6 2.6 5.0 5.2 5.7 4.3 4.3 4.41.15° 5.2 4.5 3.8 7.3 7.4 7.9 6.8 6.8 6.81.50° 7.6 6.8 4.9 9.4 9.5 10.0 9.1 9.1 9.11.83° 9.8 9.0 6.0 11.4 11.5 12.0 11.2 11.2 11.22.12° 11.7 10.9 7.5 13.2 13.3 13.7 13.1 13.1 13.1

**2.25° 12.6 11.8 8.4 14.0 14.1 14.5 14.0 14.0 13.92.38° 13.5 12.7 9.2 14.8 14.9 15.2 14.8 14.8 14.82.60° 15.0 14.2 10.7 16.1 16.2 16.5 16.3 16.3 16.22.77° 16.1 15.3 11.8 17.2 17.3 17.6 17.4 17.4 17.32.89° 16.9 16.1 12.6 17.9 18.0 18.3 18.2 18.1 18.12.97° 17.5 16.6 13.1 18.4 18.5 18.7 18.7 18.7 18.63.00° 17.7 16.8 13.3 18.6 18.7 18.9 18.9 18.9 18.8

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.50 1.50 1.83 1.50 1.50 1.507.5° 1.50 1.83 1.83 1.15 1.15 1.50 1.15 1.15 1.15

10.0° 1.15 1.50 1.83 0.78 0.78 1.15 0.78 0.78 0.7812.5° 0.78 1.15 1.83 0.39 0.39 0.78 0.39 0.39 0.3915.0° 0.39 0.78 1.50 0.00 0.00 0.39 0.00 0.00 0.0017.5° 0.39 0.39 1.15 0.00 0.00 0.00 - - - 20.0° 0.00 0.00 0.78 - - - - - - 22.5° - - 0.39 - - - - - - 25.0° - - 0.39 - - - - - - 27.5° - - 0.00 - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an SR3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 7/8 5.0 Stage SR3

Page 169: Nov mud motor handbook

161

Performance OutputStd Elastomer Max Diff Pressure 720 psi 4964 kPaStd Elastomer Torque @ Max Pressure 5972 lb-ft 8097 N-mPowerPLUS™ Max Diff Pressure 1080 psi 7446 kPaPowerPLUS Torque @ Max Pressure 8959 lb-ft 12146 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.29 rev/gal 0.077 rev/L

Speed (No Load) 87 - 174 rpm

Approx Press Drop @ 600 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

6 3/4”7/8 5.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Short Radius

Page 170: Nov mud motor handbook

162

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 384 in (9.74 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2720 lbs (1234 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.1 1.1 1.0 1.9 2.0 2.3 1.3 1.3 1.30.78° 2.7 2.3 2.1 3.7 3.8 4.2 3.3 3.3 3.31.15° 4.7 4.3 3.1 5.5 5.5 5.9 5.1 5.1 5.11.50° 6.6 6.1 4.1 7.1 7.2 7.5 6.9 6.9 6.91.83° 8.4 7.9 5.8 8.7 8.7 9.0 8.5 8.5 8.52.12° 10.0 9.5 7.4 10.1 10.1 10.4 9.9 9.9 9.9

**2.25° 10.7 10.2 8.0 10.7 10.7 11.0 10.6 10.6 10.62.38° 11.4 10.9 8.7 11.4 11.3 11.6 11.3 11.2 11.22.60° 12.6 12.1 9.9 12.6 12.4 12.6 12.6 12.3 12.32.77° 13.5 13.0 10.8 13.5 13.2 13.4 13.6 13.2 13.22.89° 14.1 13.6 11.4 14.1 13.7 13.9 14.3 13.8 13.82.97° 14.6 14.1 11.9 14.6 14.1 14.3 14.7 14.2 14.23.00° 14.7 14.2 12.0 14.7 14.3 14.5 14.9 14.3 14.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.50 1.508.0° 1.50 1.50 1.83 1.15 1.15 1.15 1.50 1.15 1.15

10.0° 1.15 1.15 1.83 0.78 0.78 0.78 0.78 0.78 0.7812.0° 0.78 1.15 1.50 0.39 0.39 0.39 0.39 0.39 0.3914.0° 0.39 0.78 1.15 0.00 0.00 0.00 0.00 0.00 0.0016.0° 0.00 0.39 0.78 - - - - - - 18.0° 0.00 0.00 0.39 - - - - - - 20.0° - - 0.39 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 7/8 5.7 Stage

Page 171: Nov mud motor handbook

163

Performance OutputStd Elastomer Max Diff Pressure 845 psi 5826 kPaStd Elastomer Torque @ Max Pressure 8204 lb-ft 11123 N-mPowerPLUS™ Max Diff Pressure 1268 psi 8739 kPaPowerPLUS Torque @ Max Pressure 12306 lb-ft 16685 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.25 rev/gal 0.066 rev/L

Speed (No Load) 75 - 150 rpm

Approx Press Drop @ 600 gpm (No Load) 400 psi 2750 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 3/4”7/8 5.7

Page 172: Nov mud motor handbook

164

®

AB

C

D EAlternate Stator Tube OD Available: 7 in (178 mm)Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 374 in (9.49 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2650 lbs (1202 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.1 1.1 1.1 1.9 2.0 2.4 1.3 1.3 1.40.78° 2.8 2.3 2.1 3.8 3.9 4.3 3.3 3.3 3.31.15° 4.8 4.4 3.1 5.6 5.7 6.0 5.2 5.2 5.21.50° 6.8 6.3 4.2 7.3 7.4 7.7 7.0 7.0 7.01.83° 8.6 8.1 6.0 8.9 8.9 9.2 8.7 8.7 8.72.12° 10.2 9.7 7.5 10.3 10.3 10.6 10.1 10.1 10.1

**2.25° 10.9 10.4 8.2 10.9 11.0 11.2 10.8 10.8 10.82.38° 11.6 11.1 8.9 11.6 11.6 11.8 11.6 11.5 11.42.60° 12.9 12.4 10.1 12.9 12.6 12.9 12.9 12.6 12.62.77° 13.8 13.3 11.0 13.8 13.4 13.7 13.9 13.4 13.42.89° 14.5 13.9 11.7 14.5 14.0 14.2 14.6 14.1 14.02.97° 14.9 14.4 12.1 14.9 14.4 14.6 15.1 14.5 14.43.00° 15.1 14.6 12.3 15.1 14.6 14.8 15.3 14.6 14.6

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.50 1.508.0° 1.50 1.50 1.83 1.15 1.15 1.15 1.50 1.15 1.15

10.0° 1.15 1.15 1.83 0.78 0.78 0.78 0.78 0.78 0.7812.0° 0.78 1.15 1.50 0.39 0.39 0.39 0.39 0.39 0.3914.0° 0.39 0.78 1.15 0.00 0.00 0.00 0.00 0.00 0.0016.0° 0.00 0.39 0.78 - - - - - - 18.0° 0.00 0.00 0.78 - - - - - - 20.0° - - 0.39 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 7/8 6.4 Stage

Page 173: Nov mud motor handbook

165

Performance OutputStd Elastomer Max Diff Pressure 995 psi 6860 kPaStd Elastomer Torque @ Max Pressure 7580 lb-ft 10277 N-mPowerPLUS™ Max Diff Pressure 1493 psi 10290 kPaPowerPLUS Torque @ Max Pressure 11370 lb-ft 15415 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.31 rev/gal 0.081 rev/L

Speed (No Load) 92 - 183 rpm

Approx Press Drop @ 600 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

6 3/4”7/8 6.4

Page 174: Nov mud motor handbook

166

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 255 in (6.46 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 1800 lbs (816 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.5 1.5 1.5 2.9 3.0 3.8 1.7 1.7 1.70.78° 4.1 3.4 2.9 5.3 5.5 6.2 4.3 4.3 4.31.15° 6.9 6.2 4.3 7.6 7.8 8.4 6.7 6.7 6.71.50° 9.6 8.9 5.9 9.8 9.9 10.6 9.1 9.1 9.11.83° 12.1 11.4 8.4 12.1 12.0 12.6 11.4 11.3 11.22.12° 14.3 13.6 10.5 14.3 13.8 14.3 13.8 13.2 13.2

**2.25° 15.3 14.6 11.5 15.3 14.6 15.1 14.9 14.0 14.02.38° 16.3 15.6 12.4 16.3 15.6 15.9 16.0 15.0 14.92.60° 18.0 17.2 14.1 18.0 17.2 17.2 17.9 16.8 16.32.77° 19.3 18.5 15.3 19.3 18.5 18.3 19.3 18.3 17.52.89° 20.2 19.4 16.2 20.2 19.4 19.0 20.3 19.3 18.32.97° 20.8 20.0 16.8 20.8 20.0 19.5 20.9 19.9 18.83.00° 21.0 20.3 17.0 21.0 20.3 19.7 21.2 20.2 19.0

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.506.0° 1.50 1.83 1.83 1.50 1.50 1.50 1.50 1.15 1.159.0° 1.15 1.50 1.83 0.78 0.78 1.15 0.78 0.78 0.78

12.0° 1.15 1.15 1.83 0.39 0.39 0.78 0.39 0.39 0.0015.0° 0.78 0.78 1.50 0.00 0.00 0.39 - - - 18.0° 0.39 0.39 1.15 - - 0.00 - - - 21.0° 0.00 0.00 0.78 - - - - - - 24.0° - - 0.39 - - - - - - 27.0° - - 0.39 - - - - - - 30.0° - - 0.00 - - - - - - 33.0° - - - - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 3/4” 8/9 3.0 Stage

Page 175: Nov mud motor handbook

167

Performance OutputStd Elastomer Max Diff Pressure 455 psi 3137 kPaStd Elastomer Torque @ Max Pressure 4418 lb-ft 5989 N-mPowerPLUS™ Max Diff Pressure 683 psi 4706 kPaPowerPLUS Torque @ Max Pressure 6626 lb-ft 8984 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 200 - 500 gpm 757 - 1893 lpm

Revs per Unit Volume (No Load) 0.3 rev/gal 0.079 rev/L

Speed (No Load) 60 - 150 rpm

Approx Press Drop @ 500 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

6 3/4”8/9 3.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 176: Nov mud motor handbook

168

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 374 in (9.49 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2850 lbs (1293 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.1 1.1 1.1 1.8 1.9 2.3 1.3 1.3 1.40.78° 2.7 2.2 2.1 3.7 3.8 4.2 3.3 3.3 3.31.15° 4.7 4.2 3.1 5.5 5.6 5.9 5.2 5.2 5.21.50° 6.7 6.2 4.1 7.2 7.3 7.6 7.0 7.0 7.01.83° 8.5 8.0 5.9 8.8 8.8 9.1 8.7 8.7 8.72.12° 10.1 9.6 7.4 10.2 10.2 10.5 10.1 10.1 10.1

**2.25° 10.8 10.3 8.1 10.8 10.9 11.1 10.8 10.8 10.82.38° 11.5 11.0 8.8 11.5 11.5 11.7 11.6 11.5 11.42.60° 12.7 12.2 10.0 12.7 12.5 12.8 12.9 12.6 12.62.77° 13.7 13.2 10.9 13.7 13.4 13.6 13.9 13.4 13.42.89° 14.4 13.8 11.6 14.4 13.9 14.1 14.6 14.1 14.02.97° 14.8 14.3 12.0 14.8 14.3 14.5 15.1 14.5 14.43.00° 15.0 14.4 12.2 15.0 14.5 14.7 15.3 14.6 14.6

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.50 1.506.0° 1.50 1.50 1.83 1.15 1.15 1.50 1.15 1.15 1.158.0° 1.15 1.50 1.83 0.78 0.78 1.15 0.78 0.78 0.78

10.0° 0.78 1.15 1.50 0.39 0.39 0.78 0.39 0.39 0.3912.0° 0.39 0.78 1.15 0.00 0.00 0.39 0.00 0.00 0.0014.0° 0.39 0.39 0.78 - - 0.00 - - - 16.0° 0.00 0.00 0.78 - - - - - - 18.0° - - 0.39 - - - - - - 20.0° - - 0.00 - - - - - - 22.0° - - - - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

7” 2/3 8.3 Stage

Page 177: Nov mud motor handbook

169

Performance OutputStd Elastomer Max Diff Pressure 1135 psi 7826 kPaStd Elastomer Torque @ Max Pressure 1881 lb-ft 2550 N-mPowerPLUS™ Max Diff Pressure 1703 psi 11738 kPaPowerPLUS Torque @ Max Pressure 2821 lb-ft 3825 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 1.57 rev/gal 0.413 rev/L

Speed (No Load) 470 - 939 rpm

Approx Press Drop @ 600 gpm (No Load) 650 psi 4500 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

7”2/3 8.3

Page 178: Nov mud motor handbook

170

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 324 in (8.22 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2470 lbs (1120 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.2 1.2 1.2 2.1 2.2 2.7 1.5 1.5 1.50.78° 3.1 2.5 2.4 4.2 4.3 4.8 3.7 3.7 3.71.15° 5.4 4.8 3.5 6.2 6.3 6.7 5.8 5.8 5.81.50° 7.6 7.0 4.6 8.0 8.1 8.5 7.8 7.8 7.81.83° 9.6 9.1 6.6 9.8 9.9 10.3 9.6 9.6 9.62.12° 11.5 10.9 8.4 11.5 11.4 11.8 11.4 11.3 11.2

**2.25° 12.3 11.7 9.2 12.3 12.1 12.5 12.3 12.0 12.02.38° 13.1 12.5 10.0 13.1 12.8 13.1 13.1 12.7 12.72.60° 14.5 13.9 11.3 14.5 14.0 14.3 14.6 14.0 13.92.77° 15.5 14.9 12.4 15.5 14.9 15.2 15.7 15.0 14.92.89° 16.3 15.7 13.1 16.3 15.7 15.8 16.6 15.8 15.62.97° 16.8 16.2 13.6 16.8 16.2 16.2 17.1 16.3 16.03.00° 17.0 16.4 13.8 17.0 16.4 16.4 17.3 16.5 16.2

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.50 1.50 1.50 1.50 1.506.0° 1.50 1.50 1.83 1.15 1.15 1.15 1.50 1.15 1.158.0° 1.15 1.15 1.83 0.78 0.78 0.78 0.78 0.78 0.78

10.0° 0.78 1.15 1.83 0.39 0.39 0.78 0.39 0.39 0.3912.0° 0.78 0.78 1.50 0.00 0.00 0.39 0.00 0.00 0.0014.0° 0.39 0.39 1.15 0.00 0.00 0.00 - - - 16.0° 0.00 0.00 0.78 - - - - - - 18.0° - 0.00 0.39 - - - - - - 20.0° - - 0.39 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

7” 7/8 6.0 Stage

Page 179: Nov mud motor handbook

171

Theoretical Performance Curve

7”7/8 6.0

Performance OutputStd Elastomer Max Diff Pressure 885 psi 6102 kPaStd Elastomer Torque @ Max Pressure 6437 lb-ft 8727 N-mPowerPLUS™ Max Diff Pressure 1328 psi 9153 kPaPowerPLUS Torque @ Max Pressure 9655 lb-ft 13090 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.33 rev/gal 0.088 rev/L

Speed (No Load) 100 - 199 rpm

Approx Press Drop @ 600 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 180: Nov mud motor handbook

172

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 374 in (9.49 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2850 lbs (1293 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.1 1.1 1.1 1.8 1.9 2.3 1.3 1.3 1.40.78° 2.7 2.2 2.1 3.7 3.8 4.2 3.3 3.3 3.31.15° 4.7 4.2 3.1 5.5 5.6 5.9 5.2 5.2 5.21.50° 6.7 6.2 4.1 7.2 7.3 7.6 7.0 7.0 7.01.83° 8.5 8.0 5.9 8.8 8.8 9.1 8.7 8.7 8.72.12° 10.1 9.6 7.4 10.2 10.2 10.5 10.1 10.1 10.1

**2.25° 10.8 10.3 8.1 10.8 10.9 11.1 10.8 10.8 10.82.38° 11.5 11.0 8.8 11.5 11.5 11.7 11.6 11.5 11.42.60° 12.7 12.2 10.0 12.7 12.5 12.8 12.9 12.6 12.62.77° 13.7 13.2 10.9 13.7 13.4 13.6 13.9 13.4 13.42.89° 14.4 13.8 11.6 14.4 13.9 14.1 14.6 14.1 14.02.97° 14.8 14.3 12.0 14.8 14.3 14.5 15.1 14.5 14.43.00° 15.0 14.4 12.2 15.0 14.5 14.7 15.3 14.6 14.6

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.50 1.506.0° 1.50 1.50 1.83 1.15 1.15 1.50 1.15 1.15 1.158.0° 1.15 1.50 1.83 0.78 0.78 1.15 0.78 0.78 0.78

10.0° 0.78 1.15 1.50 0.39 0.39 0.78 0.39 0.39 0.3912.0° 0.39 0.78 1.15 0.00 0.00 0.39 0.00 0.00 0.0014.0° 0.39 0.39 0.78 - - 0.00 - - - 16.0° 0.00 0.00 0.78 - - - - - - 18.0° - - 0.39 - - - - - - 20.0° - - 0.00 - - - - - - 22.0° - - - - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

7” 7/8 7.5 Stage

Page 181: Nov mud motor handbook

173

Theoretical Performance Curve

Performance OutputStd Elastomer Max Diff Pressure 1120 psi 7722 kPaStd Elastomer Torque @ Max Pressure 8508 lb-ft 11535 N-mPowerPLUS™ Max Diff Pressure 1680 psi 11583 kPaPowerPLUS Torque @ Max Pressure 12761 lb-ft 17302 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.31 rev/gal 0.082 rev/L

Speed (No Load) 93 - 186 rpm

Approx Press Drop @ 600 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

7”7/8 7.5

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 182: Nov mud motor handbook

174

®

AB

C

D EAlternate Stator Tube OD Available: 8 in (203 mm)Bit to Center of Stabilizer Blade A 36 in (0.92 m)Bit to Bend B 87 in (2.20 m)Bit to Top Sub C 307 in (7.80 m)Max OD of Motor at Upset for Stabilizer D 8.88 in (226 mm)Radius @ Adjusting Ring E 4.19 in (106 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 8.38 in (213 mm)Max OD of Slick Motor w/ Straight Housing 8.13 in (207 mm)Bit to Max Slick OD w/ Straight Housing 61.87 in (1571 mm)Estimated Total Weight: 2870 lbs (1302 kg)Common Top Connection: 6 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.39° 1.2 1.2 1.2 2.7 3.1 3.8 1.7 1.7 1.70.78° 2.6 2.5 2.4 4.8 5.2 5.8 3.9 3.9 3.91.15° 4.9 3.6 3.5 6.8 7.1 7.8 6.0 6.0 6.01.50° 7.2 5.7 4.6 8.7 9.0 9.6 8.0 8.0 8.01.83° 9.3 7.8 5.6 10.5 10.8 11.3 9.9 9.9 9.92.12° 11.1 9.6 6.5 12.1 12.3 12.8 11.6 11.5 11.5

**2.25° 11.9 10.4 7.3 12.8 13.0 13.5 12.3 12.3 12.22.38° 12.8 11.2 8.1 13.5 13.7 14.2 13.0 13.0 13.02.60° 14.2 12.6 9.4 14.7 14.9 15.3 14.3 14.3 14.22.77° 15.2 13.7 10.5 15.6 15.8 16.2 15.3 15.2 15.22.89° 16.0 14.4 11.2 16.2 16.4 16.8 15.9 15.9 15.92.97° 16.5 14.9 11.7 16.7 16.9 17.2 16.4 16.4 16.33.00° 16.7 15.1 11.9 16.8 17.0 17.4 16.6 16.5 16.5

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.50 1.507.5° 1.15 1.50 1.83 1.15 1.15 1.50 0.78 0.78 0.78

10.0° 0.78 1.15 1.83 0.78 0.78 1.15 0.39 0.39 0.3912.5° 0.39 0.78 1.83 0.39 0.39 0.78 0.00 0.00 0.0015.0° 0.00 0.39 1.50 0.00 0.00 0.39 - - - 17.5° 0.00 0.39 1.15 - - 0.00 - - - 20.0° - 0.00 0.78 - - - - - - 22.5° - - 0.39 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

7 3/4” 4/5 3.6 Stage

Page 183: Nov mud motor handbook

175

Performance OutputStd Elastomer Max Diff Pressure 520 psi 3585 kPaStd Elastomer Torque @ Max Pressure 5106 lb-ft 6923 N-mPowerPLUS™ Max Diff Pressure 780 psi 5378 kPaPowerPLUS Torque @ Max Pressure 7659 lb-ft 10384 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 900 gpm 1136 - 3407 lpm

Revs per Unit Volume (No Load) 0.25 rev/gal 0.066 rev/L

Speed (No Load) 75 - 226 rpm

Approx Press Drop @ 900 gpm (No Load) 200 psi 1400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

7 3/4”4/5 3.6

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 184: Nov mud motor handbook

176

®

AB

C

D EAlternate Stator Tube OD Available: 8 in (203 mm)Bit to Center of Stabilizer Blade A 36 in (0.92 m)Bit to Bend B 87 in (2.20 m)Bit to Top Sub C 367 in (9.33 m)Max OD of Motor at Upset for Stabilizer D 8.88 in (226 mm)Radius @ Adjusting Ring E 4.19 in (106 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 8.38 in (213 mm)Max OD of Slick Motor w/ Straight Housing 8.13 in (207 mm)Bit to Max Slick OD w/ Straight Housing 61.87 in (1571 mm)Estimated Total Weight: 3430 lbs (1556 kg)Common Top Connection: 6 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.39° 1.1 1.1 1.0 2.3 2.5 3.1 1.5 1.5 1.50.78° 2.2 2.1 2.1 4.1 4.4 4.9 3.5 3.5 3.51.15° 4.2 3.1 3.1 5.9 6.1 6.6 5.3 5.3 5.31.50° 6.1 4.9 4.0 7.6 7.8 8.2 7.1 7.1 7.11.83° 7.9 6.6 4.9 9.1 9.3 9.7 8.8 8.7 8.72.12° 9.5 8.2 5.6 10.5 10.7 11.1 10.2 10.2 10.2

**2.25° 10.2 8.9 6.3 11.2 11.3 11.7 10.9 10.9 10.82.38° 10.9 9.6 7.0 11.8 11.9 12.3 11.5 11.5 11.52.60° 12.1 10.8 8.1 12.8 13.0 13.3 12.6 12.6 12.62.77° 13.1 11.7 9.0 13.6 13.8 14.1 13.5 13.5 13.42.89° 13.7 12.4 9.6 14.2 14.4 14.6 14.1 14.1 14.02.97° 14.2 12.8 10.1 14.6 14.7 15.0 14.5 14.5 14.43.00° 14.3 13.0 10.2 14.7 14.9 15.2 14.6 14.6 14.6

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.50 1.506.0° 1.50 1.83 1.83 1.50 1.50 1.50 1.15 1.15 1.158.0° 1.15 1.50 1.83 1.15 1.15 1.15 0.78 0.78 0.78

10.0° 0.78 1.15 1.83 0.78 0.78 0.78 0.39 0.39 0.3912.0° 0.39 0.78 1.50 0.39 0.39 0.39 0.00 0.00 0.0014.0° 0.00 0.39 1.15 0.00 0.00 0.00 - - - 16.0° - 0.00 0.78 - - - - - - 18.0° - 0.00 0.78 - - - - - - 20.0° - - 0.39 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

7 3/4” 4/5 5.3 Stage

Page 185: Nov mud motor handbook

177

Theoretical Performance Curve

Performance OutputStd Elastomer Max Diff Pressure 750 psi 5171 kPaStd Elastomer Torque @ Max Pressure 7029 lb-ft 9530 N-mPowerPLUS™ Max Diff Pressure 1125 psi 7757 kPaPowerPLUS Torque @ Max Pressure 10544 lb-ft 14295 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 900 gpm 1136 - 3407 lpm

Revs per Unit Volume (No Load) 0.26 rev/gal 0.068 rev/L

Speed (No Load) 77 - 230 rpm

Approx Press Drop @ 900 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

7 3/4”4/5 5.3

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 186: Nov mud motor handbook

178

®

AB

C

D EAlternate Stator Tube OD Available: 8 in (203 mm)Bit to Center of Stabilizer Blade A 36 in (0.92 m)Bit to Bend B 87 in (2.20 m)Bit to Top Sub C 307 in (7.80 m)Max OD of Motor at Upset for Stabilizer D 8.88 in (226 mm)Radius @ Adjusting Ring E 4.19 in (106 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 8.38 in (213 mm)Max OD of Slick Motor w/ Straight Housing 8.13 in (207 mm)Bit to Max Slick OD w/ Straight Housing 61.87 in (1571 mm)Estimated Total Weight: 2870 lbs (1302 kg)Common Top Connection: 6 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.39° 1.2 1.2 1.2 2.7 3.1 3.8 1.7 1.7 1.70.78° 2.6 2.5 2.4 4.8 5.2 5.8 3.9 3.9 3.91.15° 4.9 3.6 3.5 6.8 7.1 7.8 6.0 6.0 6.01.50° 7.2 5.7 4.6 8.7 9.0 9.6 8.0 8.0 8.01.83° 9.3 7.8 5.6 10.5 10.8 11.3 9.9 9.9 9.92.12° 11.1 9.6 6.5 12.1 12.3 12.8 11.6 11.5 11.5

**2.25° 11.9 10.4 7.3 12.8 13.0 13.5 12.3 12.3 12.22.38° 12.8 11.2 8.1 13.5 13.7 14.2 13.0 13.0 13.02.60° 14.2 12.6 9.4 14.7 14.9 15.3 14.3 14.3 14.22.77° 15.2 13.7 10.5 15.6 15.8 16.2 15.3 15.2 15.22.89° 16.0 14.4 11.2 16.2 16.4 16.8 15.9 15.9 15.92.97° 16.5 14.9 11.7 16.7 16.9 17.2 16.4 16.4 16.33.00° 16.7 15.1 11.9 16.8 17.0 17.4 16.6 16.5 16.5

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.50 1.507.5° 1.15 1.50 1.83 1.15 1.15 1.50 0.78 0.78 0.78

10.0° 0.78 1.15 1.83 0.78 0.78 1.15 0.39 0.39 0.3912.5° 0.39 0.78 1.83 0.39 0.39 0.78 0.00 0.00 0.0015.0° 0.00 0.39 1.50 0.00 0.00 0.39 - - - 17.5° 0.00 0.39 1.15 - - 0.00 - - - 20.0° - 0.00 0.78 - - - - - - 22.5° - - 0.39 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

7 3/4” 5/6 5.0 Stage

Page 187: Nov mud motor handbook

179

Performance OutputStd Elastomer Max Diff Pressure 700 psi 4826 kPaStd Elastomer Torque @ Max Pressure 5529 lb-ft 7497 N-mPowerPLUS™ Max Diff Pressure 1050 psi 7239 kPaPowerPLUS Torque @ Max Pressure 8294 lb-ft 11245 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 500 - 900 gpm 1893 - 3407 lpm

Revs per Unit Volume (No Load) 0.29 rev/gal 0.076 rev/L

Speed (No Load) 143 - 257 rpm

Approx Press Drop @ 900 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

7 3/4”5/6 5.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 188: Nov mud motor handbook

180

®

AB

C

D EAlternate Stator Tube OD Available: 8 in (203 mm)Bit to Center of Stabilizer Blade A 36 in (0.92 m)Bit to Bend B (87 in) (2.20 m)Bit to Top Sub C 345 in (8.77 m)Max OD of Motor at Upset for Stabilizer D 8.88 in (226 mm)Radius @ Adjusting Ring E 4.19 in (106 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 8.38 in (213 mm)Max OD of Slick Motor w/ Straight Housing 8.13 in (207 mm)Bit to Max Slick OD w/ Straight Housing 61.87 in (1571 mm)Estimated Total Weight: 3230 lbs (1465 kg)Common Top Connection: 6 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.39° 1.1 1.1 1.1 2.4 2.7 3.3 1.6 1.6 1.60.78° 2.3 2.2 2.2 4.4 4.6 5.2 3.6 3.6 3.61.15° 4.4 3.3 3.2 6.2 6.5 7.0 5.6 5.6 5.61.50° 6.5 5.1 4.2 8.0 8.2 8.7 7.4 7.4 7.41.83° 8.4 7.0 5.1 9.6 9.8 10.3 9.2 9.1 9.12.12° 10.0 8.7 5.9 11.0 11.3 11.7 10.7 10.7 10.6

**2.25° 10.8 9.4 6.6 11.7 11.9 12.3 11.4 11.3 11.32.38° 11.5 10.2 7.3 12.3 12.5 12.9 12.0 12.0 12.02.60° 12.8 11.4 8.5 13.4 13.6 14.0 13.2 13.2 13.12.77° 13.8 12.4 9.5 14.3 14.5 14.8 14.1 14.1 14.02.89° 14.5 13.1 10.2 14.9 15.1 15.4 14.7 14.7 14.72.97° 14.9 13.5 10.6 15.3 15.5 15.8 15.1 15.1 15.13.00° 15.1 13.7 10.8 15.4 15.6 15.9 15.3 15.3 15.2

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.50 1.83 1.83 1.50 1.50 1.83 1.50 1.50 1.507.5° 1.15 1.50 1.83 1.15 1.15 1.50 0.78 0.78 0.78

10.0° 0.78 1.15 1.83 0.78 0.78 0.78 0.39 0.39 0.3912.5° 0.39 0.78 1.50 0.39 0.39 0.39 0.00 0.00 0.0015.0° 0.00 0.39 1.15 - 0.00 0.00 - - - 17.5° - 0.00 0.78 - - - - - - 20.0° - - 0.39 - - - - - - 22.5° - - 0.00 - - - - - - 25.0° - - - - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

7 3/4” 6/7 4.0 Stage

Page 189: Nov mud motor handbook

181

Performance OutputStd Elastomer Max Diff Pressure 565 psi 3896 kPaStd Elastomer Torque @ Max Pressure 7783 lb-ft 10553 N-mPowerPLUS™ Max Diff Pressure 848 psi 5843 kPaPowerPLUS Torque @ Max Pressure 11675 lb-ft 15829 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 900 gpm 1136 - 3407 lpm

Revs per Unit Volume (No Load) 0.18 rev/gal 0.047 rev/L

Speed (No Load) 53 - 159 rpm

Approx Press Drop @ 900 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

7 3/4”6/7 4.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 190: Nov mud motor handbook

182

®

AB

C

D EAlternate Stator Tube OD Available: 8 in (203 mm)Bit to Center of Stabilizer Blade A 36 in (0.92 m)Bit to Bend B 87 in (2.20 m)Bit to Top Sub C 307 in (7.80 m)Max OD of Motor at Upset for Stabilizer D 8.88 in (226 mm)Radius @ Adjusting Ring E 4.19 in (106 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 8.38 in (213 mm)Max OD of Slick Motor w/ Straight Housing 8.13 in (207 mm)Bit to Max Slick OD w/ Straight Housing 61.87 in (1571 mm)Estimated Total Weight: 2870 lbs (1302 kg)Common Top Connection: 6 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.39° 1.2 1.2 1.2 2.7 3.1 3.8 1.7 1.7 1.70.78° 2.6 2.5 2.4 4.8 5.2 5.8 3.9 3.9 3.91.15° 4.9 3.6 3.5 6.8 7.1 7.8 6.0 6.0 6.01.50° 7.2 5.7 4.6 8.7 9.0 9.6 8.0 8.0 8.01.83° 9.3 7.8 5.6 10.5 10.8 11.3 9.9 9.9 9.92.12° 11.1 9.6 6.5 12.1 12.3 12.8 11.6 11.5 11.5

**2.25° 11.9 10.4 7.3 12.8 13.0 13.5 12.3 12.3 12.22.38° 12.8 11.2 8.1 13.5 13.7 14.2 13.0 13.0 13.02.60° 14.2 12.6 9.4 14.7 14.9 15.3 14.3 14.3 14.22.77° 15.2 13.7 10.5 15.6 15.8 16.2 15.3 15.2 15.22.89° 16.0 14.4 11.2 16.2 16.4 16.8 15.9 15.9 15.92.97° 16.5 14.9 11.7 16.7 16.9 17.2 16.4 16.4 16.33.00° 16.7 15.1 11.9 16.8 17.0 17.4 16.6 16.5 16.5

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.50 1.507.5° 1.15 1.50 1.83 1.15 1.15 1.50 0.78 0.78 0.78

10.0° 0.78 1.15 1.83 0.78 0.78 1.15 0.39 0.39 0.3912.5° 0.39 0.78 1.83 0.39 0.39 0.78 0.00 0.00 0.0015.0° 0.00 0.39 1.50 0.00 0.00 0.39 - - - 17.5° 0.00 0.39 1.15 - - 0.00 - - - 20.0° - 0.00 0.78 - - - - - - 22.5° - - 0.39 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

7 3/4” 7/8 2.0 Stage

Page 191: Nov mud motor handbook

183

Performance OutputStd Elastomer Max Diff Pressure 295 psi 2034 kPaStd Elastomer Torque @ Max Pressure 6055 lb-ft 8209 N-mPowerPLUS™ Max Diff Pressure 443 psi 3051 kPaPowerPLUS Torque @ Max Pressure 9082 lb-ft 12314 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 900 gpm 1136 - 3407 lpm

Revs per Unit Volume (No Load) 0.12 rev/gal 0.031 rev/L

Speed (No Load) 35 - 106 rpm

Approx Press Drop @ 900 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

7 3/4”7/8 2.0

Page 192: Nov mud motor handbook

184

®

AB

C

D EAlternate Stator Tube OD Available: 8 in (203 mm)Bit to Center of Stabilizer Blade A 36 in (0.92 m)Bit to Bend B 87 in (2.20 m)Bit to Top Sub C 307 in (7.80 m)Max OD of Motor at Upset for Stabilizer D 8.88 in (226 mm)Radius @ Adjusting Ring E 4.19 in (106 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 8.38 in (213 mm)Max OD of Slick Motor w/ Straight Housing 8.13 in (207 mm)Bit to Max Slick OD w/ Straight Housing 61.87 in (1571 mm)Estimated Total Weight: 2870 lbs (1302 kg)Common Top Connection: 6 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.39° 1.2 1.2 1.2 2.7 3.1 3.8 1.7 1.7 1.70.78° 2.6 2.5 2.4 4.8 5.2 5.8 3.9 3.9 3.91.15° 4.9 3.6 3.5 6.8 7.1 7.8 6.0 6.0 6.01.50° 7.2 5.7 4.6 8.7 9.0 9.6 8.0 8.0 8.01.83° 9.3 7.8 5.6 10.5 10.8 11.3 9.9 9.9 9.92.12° 11.1 9.6 6.5 12.1 12.3 12.8 11.6 11.5 11.5

**2.25° 11.9 10.4 7.3 12.8 13.0 13.5 12.3 12.3 12.22.38° 12.8 11.2 8.1 13.5 13.7 14.2 13.0 13.0 13.02.60° 14.2 12.6 9.4 14.7 14.9 15.3 14.3 14.3 14.22.77° 15.2 13.7 10.5 15.6 15.8 16.2 15.3 15.2 15.22.89° 16.0 14.4 11.2 16.2 16.4 16.8 15.9 15.9 15.92.97° 16.5 14.9 11.7 16.7 16.9 17.2 16.4 16.4 16.33.00° 16.7 15.1 11.9 16.8 17.0 17.4 16.6 16.5 16.5

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.50 1.507.5° 1.15 1.50 1.83 1.15 1.15 1.50 0.78 0.78 0.78

10.0° 0.78 1.15 1.83 0.78 0.78 1.15 0.39 0.39 0.3912.5° 0.39 0.78 1.83 0.39 0.39 0.78 0.00 0.00 0.0015.0° 0.00 0.39 1.50 0.00 0.00 0.39 - - - 17.5° 0.00 0.39 1.15 - - 0.00 - - - 20.0° - 0.00 0.78 - - - - - - 22.5° - - 0.39 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

7 3/4” 7/8 3.0 Stage

Page 193: Nov mud motor handbook

185

Performance OutputStd Elastomer Max Diff Pressure 460 psi 3172 kPaStd Elastomer Torque @ Max Pressure 6604 lb-ft 8954 N-mPowerPLUS™ Max Diff Pressure 690 psi 4757 kPaPowerPLUS Torque @ Max Pressure 9906 lb-ft 13430 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 900 gpm 1136 - 3407 lpm

Revs per Unit Volume (No Load) 0.17 rev/gal 0.045 rev/L

Speed (No Load) 51 - 152 rpm

Approx Press Drop @ 900 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

7 3/4”7/8 3.0

Page 194: Nov mud motor handbook

186

®

AB

C

D EAlternate Stator Tube OD Available: 8 in (203 mm)Bit to Center of Stabilizer Blade A 36 in (0.92 m)Bit to Bend B 87 in (2.20 m)Bit to Top Sub C 345 in (8.77 m)Max OD of Motor at Upset for Stabilizer D 8.88 in (226 mm)Radius @ Adjusting Ring E 4.19 in (106 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 8.38 in (213 mm)Max OD of Slick Motor w/ Straight Housing 8.13 in (207 mm)Bit to Max Slick OD w/ Straight Housing 61.87 in (1571 mm)Estimated Total Weight: 3230 lbs (1465 kg)Common Top Connection: 6 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.39° 1.1 1.1 1.1 2.4 2.7 3.3 1.6 1.6 1.60.78° 2.3 2.2 2.2 4.4 4.6 5.2 3.6 3.6 3.61.15° 4.4 3.3 3.2 6.2 6.5 7.0 5.6 5.6 5.61.50° 6.5 5.1 4.2 8.0 8.2 8.7 7.4 7.4 7.41.83° 8.4 7.0 5.1 9.6 9.8 10.3 9.2 9.1 9.12.12° 10.0 8.7 5.9 11.0 11.3 11.7 10.7 10.7 10.6

**2.25° 10.8 9.4 6.6 11.7 11.9 12.3 11.4 11.3 11.32.38° 11.5 10.2 7.3 12.3 12.5 12.9 12.0 12.0 12.02.60° 12.8 11.4 8.5 13.4 13.6 14.0 13.2 13.2 13.12.77° 13.8 12.4 9.5 14.3 14.5 14.8 14.1 14.1 14.02.89° 14.5 13.1 10.2 14.9 15.1 15.4 14.7 14.7 14.72.97° 14.9 13.5 10.6 15.3 15.5 15.8 15.1 15.1 15.13.00° 15.1 13.7 10.8 15.4 15.6 15.9 15.3 15.3 15.2

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.50 1.83 1.83 1.50 1.50 1.83 1.50 1.50 1.507.5° 1.15 1.50 1.83 1.15 1.15 1.50 0.78 0.78 0.78

10.0° 0.78 1.15 1.83 0.78 0.78 0.78 0.39 0.39 0.3912.5° 0.39 0.78 1.50 0.39 0.39 0.39 0.00 0.00 0.0015.0° 0.00 0.39 1.15 - 0.00 0.00 - - - 17.5° - 0.00 0.78 - - - - - - 20.0° - - 0.39 - - - - - - 22.5° - - 0.00 - - - - - - 25.0° - - - - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

7 3/4” 7/8 4.0 Stage

Page 195: Nov mud motor handbook

187

Performance OutputStd Elastomer Max Diff Pressure 570 psi 3930 kPaStd Elastomer Torque @ Max Pressure 8333 lb-ft 11299 N-mPowerPLUS™ Max Diff Pressure 855 psi 5895 kPaPowerPLUS Torque @ Max Pressure 12500 lb-ft 16948 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 900 gpm 1136 - 3407 lpm

Revs per Unit Volume (No Load) 0.17 rev/gal 0.044 rev/L

Speed (No Load) 50 - 149 rpm

Approx Press Drop @ 900 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

7 3/4”7/8 4.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 196: Nov mud motor handbook

188

®

AB

C

D E

Bit to Center of Stabilizer Blade A 36 in (0.92 m)Bit to Bend B 87 in (2.20 m)Bit to Top Sub C 251 in (6.37 m)Max OD of Motor at Upset for Stabilizer D 8.88 in (226 mm)Radius @ Adjusting Ring E 4.19 in (106 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 8.38 in (213 mm)Max OD of Slick Motor w/ Straight Housing 8.13 in (207 mm)Bit to Max Slick OD w/ Straight Housing 61.87 in (1571 mm)Estimated Total Weight: 2500 lbs (1134 kg)Common Top Connection: 6 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.39° 1.5 1.4 1.4 3.2 3.7 4.7 1.9 1.9 1.90.78° 2.9 2.9 2.8 5.6 6.1 7.0 4.4 4.4 4.41.15° 5.7 4.2 4.1 7.8 8.3 9.2 6.8 6.8 6.81.50° 8.3 6.6 5.4 10.0 10.4 11.2 9.1 9.1 9.11.83° 10.8 9.0 6.5 12.0 12.4 13.2 11.2 11.2 11.22.12° 12.9 11.1 7.6 13.8 14.1 14.9 13.1 13.1 13.0

**2.25° 13.9 12.1 8.4 14.6 14.9 15.6 14.0 13.9 13.92.38° 14.9 13.0 9.3 15.4 15.7 16.4 14.8 14.8 14.72.60° 16.5 14.7 10.9 16.7 17.0 17.7 16.2 16.2 16.12.77° 17.8 15.9 12.1 17.8 18.1 18.7 17.3 17.3 17.22.89° 18.7 16.8 12.9 18.7 18.8 19.4 18.3 18.1 18.02.97° 19.3 17.4 13.5 19.3 19.3 19.9 18.9 18.6 18.53.00° 19.5 17.6 13.7 19.5 19.4 20.0 19.2 18.8 18.7

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.83 1.83 1.50 1.50 1.83 1.15 1.15 1.159.0° 1.15 1.83 1.83 1.15 1.15 1.50 0.78 0.78 0.78

12.0° 0.78 1.50 1.83 0.78 0.78 1.15 0.39 0.39 0.3915.0° 0.39 1.15 1.83 0.39 0.39 0.39 0.00 0.00 0.0018.0° 0.39 0.78 1.83 - 0.00 0.00 - - - 21.0° 0.00 0.39 1.50 - - - - - - 24.0° - 0.00 1.15 - - - - - - 27.0° - - 0.78 - - - - - - 30.0° - - 0.39 - - - - - - 33.0° - - 0.00 - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

8” 5/6 3.0 Stage

Page 197: Nov mud motor handbook

189

Performance OutputStd Elastomer Max Diff Pressure 435 psi 2999 kPaStd Elastomer Torque @ Max Pressure 3436 lb-ft 4659 N-mPowerPLUS™ Max Diff Pressure 653 psi 4499 kPaPowerPLUS Torque @ Max Pressure 5154 lb-ft 6988 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 500 - 900 gpm 1893 - 3407 lpm

Revs per Unit Volume (No Load) 0.31 rev/gal 0.082 rev/L

Speed (No Load) 155 - 279 rpm

Approx Press Drop @ 900 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

8”5/6 3.0

Page 198: Nov mud motor handbook

190

®

AB

C

D E

Bit to Center of Stabilizer Blade A 36 in (0.92 m)Bit to Bend B 87 in (2.20 m)Bit to Top Sub C 389 in (9.89 m)Max OD of Motor at Upset for Stabilizer D 8.88 in (226 mm)Radius @ Adjusting Ring E 4.19 in (106 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 8.38 in (213 mm)Max OD of Slick Motor w/ Straight Housing 8.13 in (207 mm)Bit to Max Slick OD w/ Straight Housing 61.87 in (1571 mm)Estimated Total Weight: 3880 lbs (1760 kg)Common Top Connection: 6 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.39° 1.0 1.0 1.0 2.0 2.3 2.8 1.5 1.5 1.50.78° 2.0 2.0 2.0 3.8 4.0 4.5 3.3 3.3 3.31.15° 3.9 3.0 2.9 5.5 5.7 6.2 5.1 5.1 5.11.50° 5.7 4.5 3.8 7.1 7.3 7.7 6.8 6.8 6.81.83° 7.4 6.2 4.6 8.6 8.8 9.2 8.4 8.4 8.42.12° 8.9 7.7 5.4 10.0 10.1 10.5 9.8 9.8 9.8

**2.25° 9.6 8.4 5.9 10.6 10.7 11.0 10.4 10.4 10.42.38° 10.3 9.1 6.5 11.2 11.3 11.6 11.0 11.0 11.02.60° 11.4 10.2 7.6 12.2 12.3 12.6 12.1 12.1 12.12.77° 12.3 11.1 8.5 13.0 13.1 13.4 12.9 12.9 12.92.89° 13.0 11.7 9.1 13.5 13.6 13.9 13.5 13.5 13.42.97° 13.4 12.1 9.5 13.9 14.0 14.3 13.9 13.9 13.83.00° 13.5 12.3 9.6 14.0 14.1 14.4 14.0 14.0 14.0

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.83 1.83 1.50 1.50 1.83 1.50 1.50 1.508.0° 1.15 1.50 1.83 1.15 1.15 1.50 1.15 1.15 1.15

10.0° 0.78 1.15 1.83 0.78 0.78 1.15 0.39 0.39 0.3912.0° 0.39 0.78 1.50 0.39 0.39 0.78 0.00 0.00 0.0014.0° 0.00 0.39 1.15 0.00 0.00 0.39 - - - 16.0° 0.00 0.00 0.78 - - 0.00 - - - 18.0° - 0.00 0.78 - - - - - - 20.0° - - 0.39 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

8” 6/7 5.0 Stage

Page 199: Nov mud motor handbook

191

Performance OutputStd Elastomer Max Diff Pressure 715 psi 4930 kPaStd Elastomer Torque @ Max Pressure 9618 lb-ft 13041 N-mPowerPLUS™ Max Diff Pressure 1073 psi 7395 kPaPowerPLUS Torque @ Max Pressure 14427 lb-ft 19561 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 900 gpm 1136 - 3407 lpm

Revs per Unit Volume (No Load) 0.18 rev/gal 0.047 rev/L

Speed (No Load) 53 - 159 rpm

Approx Press Drop @ 900 gpm (No Load) 300 psi 2050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

8”6/7 5.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 200: Nov mud motor handbook

192

®

AB

C

D E

Bit to Center of Stabilizer Blade A 43 in (1.09 m)Bit to Bend B 98 in (2.49 m)Bit to Top Sub C 364 in (9.26 m)Max OD of Motor at Upset for Stabilizer D 10.75 in (273 mm)Radius @ Adjusting Ring E 5.00 in (127 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 10.00 in (254 mm)Max OD of Slick Motor w/ Straight Housing 9.75 in (248 mm)Bit to Max Slick OD w/ Straight Housing 13.69 in (348 mm)Estimated Total Weight: 5250 lbs (2381 kg)Common Top Connection: 6 5/8 REG, 7 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG, 7 5/8 REG * For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.39° 1.0 1.0 1.0 2.4 3.2 4.0 1.6 1.6 1.60.78° 2.1 2.0 1.9 4.2 4.9 5.6 3.5 3.5 3.51.15° 3.2 3.0 2.8 5.9 6.6 7.2 5.3 5.3 5.31.50° 5.0 3.9 3.7 7.5 8.1 8.7 7.0 7.0 7.01.83° 6.8 4.7 4.5 9.0 9.6 10.1 8.7 8.6 8.62.12° 8.3 5.4 5.2 10.3 10.9 11.4 10.1 10.0 10.0

**2.25° 9.0 5.8 5.6 10.9 11.5 11.9 10.7 10.7 10.62.38° 9.7 6.2 5.9 11.5 12.0 12.5 11.4 11.3 11.32.60° 10.9 7.3 6.4 12.5 13.0 13.4 12.5 12.4 12.32.77° 11.8 8.2 6.8 13.3 13.8 14.2 13.3 13.2 13.22.89° 12.4 8.8 7.1 13.9 14.3 14.7 13.9 13.8 13.72.97° 12.9 9.2 7.3 14.2 14.7 15.0 14.3 14.2 14.13.00° 13.0 9.3 7.4 14.4 14.8 15.1 14.4 14.4 14.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.15 1.15 1.159.0° 1.15 1.83 1.83 0.78 1.15 1.50 0.39 0.39 0.39

12.0° 0.78 1.83 1.83 0.39 0.39 0.78 0.00 0.00 0.0015.0° 0.00 1.50 1.83 - 0.00 0.39 - - - 18.0° - 0.78 1.83 - - - - - - 21.0° - 0.39 1.83 - - - - - - 24.0° - 0.00 1.15 - - - - - - 27.0° - - 0.78 - - - - - - 30.0° - - 0.00 - - - - - - 33.0° - - - - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

9 5/8” 2/3 7.5 Stage

Page 201: Nov mud motor handbook

193

Performance OutputStd Elastomer Max Diff Pressure 1040 psi 7171 kPaStd Elastomer Torque @ Max Pressure 5853 lb-ft 7936 N-mPowerPLUS™ Max Diff Pressure 1560 psi 10756 kPaPowerPLUS Torque @ Max Pressure 8780 lb-ft 11904 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 600 - 1200 gpm 2271 - 4542 lpm

Revs per Unit Volume (No Load) 0.49 rev/gal 0.13 rev/L

Speed (No Load) 295 - 590 rpm

Approx Press Drop @ 1200 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

9 5/8”2/3 7.5

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 202: Nov mud motor handbook

194

®

AB

C

D E

Bit to Center of Stabilizer Blade A 43 in (1.09 m)Bit to Bend B 98 in (2.49 m)Bit to Top Sub C 334 in (8.49 m)Max OD of Motor at Upset for Stabilizer D 10.75 in (273 mm)Radius @ Adjusting Ring E 5.00 in (127 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 10.00 in (254 mm)Max OD of Slick Motor w/ Straight Housing 9.75 in (248 mm)Bit to Max Slick OD w/ Straight Housing 13.69 in (348 mm)Estimated Total Weight: 4820 lbs (2186 kg)Common Top Connection: 6 5/8 REG, 7 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG, 7 5/8 REG * For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.39° 1.1 1.1 1.0 2.6 3.6 4.4 1.6 1.6 1.70.78° 2.2 2.1 2.1 4.5 5.4 6.2 3.7 3.7 3.71.15° 3.4 3.2 3.0 6.3 7.1 7.8 5.6 5.6 5.61.50° 5.4 4.1 3.9 8.0 8.8 9.4 7.5 7.4 7.41.83° 7.3 5.0 4.8 9.6 10.3 10.9 9.2 9.1 9.12.12° 9.0 5.8 5.6 11.0 11.7 12.2 10.7 10.6 10.6

**2.25° 9.7 6.2 5.9 11.7 12.3 12.8 11.4 11.3 11.32.38° 10.4 6.6 6.3 12.3 12.9 13.4 12.1 12.0 11.92.60° 11.7 7.8 6.8 13.4 13.9 14.4 13.2 13.1 13.12.77° 12.7 8.7 7.3 14.2 14.7 15.1 14.1 14.0 13.92.89° 13.3 9.4 7.6 14.8 15.3 15.7 14.7 14.6 14.62.97° 13.8 9.8 7.8 15.2 15.6 16.0 15.1 15.1 15.03.00° 14.0 10.0 7.9 15.3 15.8 16.2 15.3 15.2 15.1

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.83 1.83 1.83 1.50 1.83 1.83 1.15 1.15 1.159.0° 1.15 1.83 1.83 0.78 1.15 1.50 0.39 0.39 0.39

12.0° 0.78 1.83 1.83 0.39 0.78 1.15 0.00 0.00 0.0015.0° 0.39 1.50 1.83 0.00 0.00 0.39 - - - 18.0° 0.00 1.15 1.83 - - 0.00 - - - 21.0° - 0.78 1.83 - - - - - - 24.0° - 0.39 1.50 - - - - - - 27.0° - 0.00 1.15 - - - - - - 30.0° - - 0.78 - - - - - - 33.0° - - 0.39 - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

9 5/8” 3/4 4.5 Stage

Page 203: Nov mud motor handbook

195

Performance OutputStd Elastomer Max Diff Pressure 615 psi 4240 kPaStd Elastomer Torque @ Max Pressure 7184 lb-ft 9740 N-mPowerPLUS™ Max Diff Pressure 923 psi 6360 kPaPowerPLUS Torque @ Max Pressure 10776 lb-ft 14610 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 600 - 1200 gpm 2271 - 4542 lpm

Revs per Unit Volume (No Load) 0.22 rev/gal 0.057 rev/L

Speed (No Load) 130 - 260 rpm

Approx Press Drop @ 1200 gpm (No Load) 150 psi 1050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

9 5/8”3/4 4.5

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 204: Nov mud motor handbook

196

®

AB

C

D E

Bit to Center of Stabilizer Blade A 43 in (1.09 m)Bit to Bend B 98 in (2.49 m)Bit to Top Sub C 384 in (9.76 m)Max OD of Motor at Upset for Stabilizer D 10.75 in (273 mm)Radius @ Adjusting Ring E 5.00 in (127 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 10.00 in (254 mm)Max OD of Slick Motor w/ Straight Housing 9.75 in (248 mm)Bit to Max Slick OD w/ Straight Housing 13.69 in (348 mm)Estimated Total Weight: 5540 lbs (2513 kg)Common Top Connection: 6 5/8 REG, 7 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG, 7 5/8 REG * For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.39° 1.0 1.0 0.9 2.3 3.0 3.7 1.5 1.5 1.50.78° 2.0 1.9 1.9 4.0 4.7 5.3 3.4 3.4 3.31.15° 3.0 2.8 2.7 5.6 6.3 6.9 5.1 5.1 5.11.50° 4.8 3.7 3.6 7.2 7.8 8.3 6.8 6.8 6.71.83° 6.5 4.5 4.3 8.7 9.2 9.7 8.3 8.3 8.32.12° 8.0 5.2 5.0 9.9 10.4 10.9 9.7 9.7 9.6

**2.25° 8.6 5.5 5.3 10.5 11.0 11.4 10.3 10.3 10.22.38° 9.3 5.9 5.6 11.1 11.5 11.9 11.0 10.9 10.92.60° 10.4 7.0 6.2 12.1 12.5 12.9 12.0 11.9 11.92.77° 11.3 7.8 6.6 12.8 13.2 13.6 12.8 12.7 12.72.89° 11.9 8.4 6.8 13.3 13.7 14.1 13.4 13.3 13.22.97° 12.3 8.8 7.0 13.7 14.1 14.4 13.8 13.7 13.63.00° 12.5 9.0 7.1 13.8 14.2 14.5 13.9 13.8 13.8

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.15 1.15 1.159.0° 1.15 1.83 1.83 0.78 1.15 1.50 0.39 0.39 0.39

12.0° 0.78 1.83 1.83 0.39 0.39 0.78 0.00 0.00 0.0015.0° 0.00 1.15 1.83 - 0.00 0.00 - - - 18.0° - 0.78 1.83 - - - - - - 21.0° - 0.39 1.50 - - - - - - 24.0° - - 0.78 - - - - - - 27.0° - - 0.39 - - - - - - 30.0° - - 0.00 - - - - - - 33.0° - - - - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

9 5/8” 3/4 6.0 Stage

Page 205: Nov mud motor handbook

197

Performance OutputStd Elastomer Max Diff Pressure 830 psi 5723 kPaStd Elastomer Torque @ Max Pressure 8849 lb-ft 11997 N-mPowerPLUS™ Max Diff Pressure 1245 psi 8584 kPaPowerPLUS Torque @ Max Pressure 13273 lb-ft 17996 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 600 - 1200 gpm 2271 - 4542 lpm

Revs per Unit Volume (No Load) 0.21 rev/gal 0.055 rev/L

Speed (No Load) 125 - 251 rpm

Approx Press Drop @ 1200 gpm (No Load) 350 psi 2400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

9 5/8”3/4 6.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 206: Nov mud motor handbook

198

®

AB

C

D E

Bit to Center of Stabilizer Blade A 43 in (1.09 m)Bit to Bend B 98 in (2.49 m)Bit to Top Sub C 334 in (8.49 m)Max OD of Motor at Upset for Stabilizer D 10.75 in (273 mm)Radius @ Adjusting Ring E 5.00 in (127 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 10.00 in (254 mm)Max OD of Slick Motor w/ Straight Housing 9.75 in (248 mm)Bit to Max Slick OD w/ Straight Housing 13.69 in (348 mm)Estimated Total Weight: 4820 lbs (2186 kg)Common Top Connection: 6 5/8 REG, 7 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG, 7 5/8 REG * For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.39° 1.1 1.1 1.0 2.6 3.6 4.4 1.6 1.6 1.70.78° 2.2 2.1 2.1 4.5 5.4 6.2 3.7 3.7 3.71.15° 3.4 3.2 3.0 6.3 7.1 7.8 5.6 5.6 5.61.50° 5.4 4.1 3.9 8.0 8.8 9.4 7.5 7.4 7.41.83° 7.3 5.0 4.8 9.6 10.3 10.9 9.2 9.1 9.12.12° 9.0 5.8 5.6 11.0 11.7 12.2 10.7 10.6 10.6

**2.25° 9.7 6.2 5.9 11.7 12.3 12.8 11.4 11.3 11.32.38° 10.4 6.6 6.3 12.3 12.9 13.4 12.1 12.0 11.92.60° 11.7 7.8 6.8 13.4 13.9 14.4 13.2 13.1 13.12.77° 12.7 8.7 7.3 14.2 14.7 15.1 14.1 14.0 13.92.89° 13.3 9.4 7.6 14.8 15.3 15.7 14.7 14.6 14.62.97° 13.8 9.8 7.8 15.2 15.6 16.0 15.1 15.1 15.03.00° 14.0 10.0 7.9 15.3 15.8 16.2 15.3 15.2 15.1

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.83 1.83 1.83 1.50 1.83 1.83 1.15 1.15 1.159.0° 1.15 1.83 1.83 0.78 1.15 1.50 0.39 0.39 0.39

12.0° 0.78 1.83 1.83 0.39 0.78 1.15 0.00 0.00 0.0015.0° 0.39 1.50 1.83 0.00 0.00 0.39 - - - 18.0° 0.00 1.15 1.83 - - 0.00 - - - 21.0° - 0.78 1.83 - - - - - - 24.0° - 0.39 1.50 - - - - - - 27.0° - 0.00 1.15 - - - - - - 30.0° - - 0.78 - - - - - - 33.0° - - 0.39 - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

9 5/8” 5/6 3.0 Stage

Page 207: Nov mud motor handbook

199

Performance OutputStd Elastomer Max Diff Pressure 410 psi 2827 kPaStd Elastomer Torque @ Max Pressure 8988 lb-ft 12187 N-mPowerPLUS™ Max Diff Pressure 615 psi 4240 kPaPowerPLUS Torque @ Max Pressure 13483 lb-ft 18280 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 600 - 1200 gpm 2271 - 4542 lpm

Revs per Unit Volume (No Load) 0.11 rev/gal 0.029 rev/L

Speed (No Load) 67 - 133 rpm

Approx Press Drop @ 1200 gpm (No Load) 150 psi 1050 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

9 5/8”5/6 3.0

Page 208: Nov mud motor handbook

200

®

AB

C

D E

Bit to Center of Stabilizer Blade A 43 in (1.09 m)Bit to Bend B 98 in (2.49 m)Bit to Top Sub C 384 in (9.76 m)Max OD of Motor at Upset for Stabilizer D 10.75 in (273 mm)Radius @ Adjusting Ring E 5.00 in (127 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 10.00 in (254 mm)Max OD of Slick Motor w/ Straight Housing 9.75 in (248 mm)Bit to Max Slick OD w/ Straight Housing 13.69 in (348 mm)Estimated Total Weight: 5540 lbs (2513 kg)Common Top Connection: 6 5/8 REG, 7 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG, 7 5/8 REG * For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.39° 1.0 1.0 0.9 2.3 3.0 3.7 1.5 1.5 1.50.78° 2.0 1.9 1.9 4.0 4.7 5.3 3.4 3.4 3.31.15° 3.0 2.8 2.7 5.6 6.3 6.9 5.1 5.1 5.11.50° 4.8 3.7 3.6 7.2 7.8 8.3 6.8 6.8 6.71.83° 6.5 4.5 4.3 8.7 9.2 9.7 8.3 8.3 8.32.12° 8.0 5.2 5.0 9.9 10.4 10.9 9.7 9.7 9.6

**2.25° 8.6 5.5 5.3 10.5 11.0 11.4 10.3 10.3 10.22.38° 9.3 5.9 5.6 11.1 11.5 11.9 11.0 10.9 10.92.60° 10.4 7.0 6.2 12.1 12.5 12.9 12.0 11.9 11.92.77° 11.3 7.8 6.6 12.8 13.2 13.6 12.8 12.7 12.72.89° 11.9 8.4 6.8 13.3 13.7 14.1 13.4 13.3 13.22.97° 12.3 8.8 7.0 13.7 14.1 14.4 13.8 13.7 13.63.00° 12.5 9.0 7.1 13.8 14.2 14.5 13.9 13.8 13.8

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.15 1.15 1.159.0° 1.15 1.83 1.83 0.78 1.15 1.50 0.39 0.39 0.39

12.0° 0.78 1.83 1.83 0.39 0.39 0.78 0.00 0.00 0.0015.0° 0.00 1.15 1.83 - 0.00 0.00 - - - 18.0° - 0.78 1.83 - - - - - - 21.0° - 0.39 1.50 - - - - - - 24.0° - - 0.78 - - - - - - 27.0° - - 0.39 - - - - - - 30.0° - - 0.00 - - - - - - 33.0° - - - - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

9 5/8” 5/6 4.0 Stage

Page 209: Nov mud motor handbook

201

Theoretical Performance Curve

Performance OutputStd Elastomer Max Diff Pressure 555 psi 3827 kPaStd Elastomer Torque @ Max Pressure 11865 lb-ft 16087 N-mPowerPLUS™ Max Diff Pressure 833 psi 5740 kPaPowerPLUS Torque @ Max Pressure 17798 lb-ft 24131 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 600 - 1200 gpm 2271 - 4542 lpm

Revs per Unit Volume (No Load) 0.11 rev/gal 0.029 rev/L

Speed (No Load) 66 - 132 rpm

Approx Press Drop @ 1200 gpm (No Load) 200 psi 1400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

9 5/8”5/6 4.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 210: Nov mud motor handbook

202

®

AB

C

D E

Bit to Center of Stabilizer Blade A 43 in (1.09 m)Bit to Bend B 98 in (2.49 m)Bit to Top Sub C 364 in (9.26 m)Max OD of Motor at Upset for Stabilizer D 10.75 in (273 mm)Radius @ Adjusting Ring E 5.00 in (127 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 10.00 in (254 mm)Max OD of Slick Motor w/ Straight Housing 9.75 in (248 mm)Bit to Max Slick OD w/ Straight Housing 13.69 in (348 mm)Estimated Total Weight: 5250 lbs (2381 kg)Common Top Connection: 6 5/8 REG, 7 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG, 7 5/8 REG * For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.39° 1.0 1.0 1.0 2.4 3.2 4.0 1.6 1.6 1.60.78° 2.1 2.0 1.9 4.2 4.9 5.6 3.5 3.5 3.51.15° 3.2 3.0 2.8 5.9 6.6 7.2 5.3 5.3 5.31.50° 5.0 3.9 3.7 7.5 8.1 8.7 7.0 7.0 7.01.83° 6.8 4.7 4.5 9.0 9.6 10.1 8.7 8.6 8.62.12° 8.3 5.4 5.2 10.3 10.9 11.4 10.1 10.0 10.0

**2.25° 9.0 5.8 5.6 10.9 11.5 11.9 10.7 10.7 10.62.38° 9.7 6.2 5.9 11.5 12.0 12.5 11.4 11.3 11.32.60° 10.9 7.3 6.4 12.5 13.0 13.4 12.5 12.4 12.32.77° 11.8 8.2 6.8 13.3 13.8 14.2 13.3 13.2 13.22.89° 12.4 8.8 7.1 13.9 14.3 14.7 13.9 13.8 13.72.97° 12.9 9.2 7.3 14.2 14.7 15.0 14.3 14.2 14.13.00° 13.0 9.3 7.4 14.4 14.8 15.1 14.4 14.4 14.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.15 1.15 1.159.0° 1.15 1.83 1.83 0.78 1.15 1.50 0.39 0.39 0.39

12.0° 0.78 1.83 1.83 0.39 0.39 0.78 0.00 0.00 0.0015.0° 0.00 1.50 1.83 - 0.00 0.39 - - - 18.0° - 0.78 1.83 - - - - - - 21.0° - 0.39 1.83 - - - - - - 24.0° - 0.00 1.15 - - - - - - 27.0° - - 0.78 - - - - - - 30.0° - - 0.00 - - - - - - 33.0° - - - - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

9 5/8” 6/7 5.0 Stage

Page 211: Nov mud motor handbook

203

Performance OutputStd Elastomer Max Diff Pressure 715 psi 4930 kPaStd Elastomer Torque @ Max Pressure 12881 lb-ft 17465 N-mPowerPLUS™ Max Diff Pressure 1073 psi 7395 kPaPowerPLUS Torque @ Max Pressure 19322 lb-ft 26197 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 600 - 1200 gpm 2271 - 4542 lpm

Revs per Unit Volume (No Load) 0.13 rev/gal 0.034 rev/L

Speed (No Load) 78 - 156 rpm

Approx Press Drop @ 1200 gpm (No Load) 200 psi 1400 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

9 5/8”6/7 5.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 212: Nov mud motor handbook

204

®

AB

C

D E

Bit to Center of Stabilizer Blade A 43 in (1.09 m)Bit to Bend B 98 in (2.49 m)Bit to Top Sub C 406 in (10.32 m)Max OD of Motor at Upset for Stabilizer D 10.75 in (273 mm)Radius @ Adjusting Ring E 5.00 in (127 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 10.00 in (254 mm)Max OD of Slick Motor w/ Straight Housing 9.75 in (248 mm)Bit to Max Slick OD w/ Straight Housing 13.69 in (348 mm)Estimated Total Weight: 5860 lbs (2658 kg)Common Top Connection: 6 5/8 REG, 7 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG, 7 5/8 REG * For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.39° 1.0 0.9 0.9 2.2 2.8 3.4 1.4 1.5 1.50.78° 1.9 1.8 1.8 3.8 4.4 5.0 3.2 3.2 3.21.15° 2.9 2.7 2.6 5.4 6.0 6.5 4.9 4.9 4.91.50° 4.6 3.5 3.4 6.9 7.4 7.9 6.5 6.5 6.51.83° 6.2 4.3 4.2 8.3 8.8 9.2 8.0 8.0 8.02.12° 7.6 5.0 4.8 9.5 10.0 10.4 9.3 9.3 9.3

**2.25° 8.3 5.3 5.1 10.1 10.5 10.9 9.9 9.9 9.82.38° 8.9 5.6 5.4 10.6 11.0 11.4 10.5 10.5 10.42.60° 10.0 6.7 5.9 11.6 11.9 12.3 11.5 11.5 11.42.77° 10.8 7.5 6.3 12.3 12.7 13.0 12.3 12.3 12.22.89° 11.4 8.0 6.6 12.8 13.1 13.4 12.9 12.8 12.72.97° 11.8 8.4 6.7 13.1 13.5 13.8 13.2 13.2 13.13.00° 11.9 8.6 6.8 13.3 13.6 13.9 13.4 13.3 13.2

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.50 1.83 1.83 1.50 1.50 1.507.5° 1.50 1.83 1.83 1.15 1.50 1.50 0.78 0.78 0.78

10.0° 0.78 1.83 1.83 0.39 0.78 1.15 0.39 0.39 0.3912.5° 0.39 1.50 1.83 0.00 0.39 0.39 - - - 15.0° 0.00 1.15 1.83 - - 0.00 - - - 17.5° - 0.78 1.83 - - - - - - 20.0° - 0.39 1.50 - - - - - - 22.5° - - 0.78 - - - - - - 25.0° - - 0.39 - - - - - - 27.5° - - 0.00 - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

9 5/8” 6/7 6.0 Stage

Page 213: Nov mud motor handbook

205

Performance OutputStd Elastomer Max Diff Pressure 880 psi 6067 kPaStd Elastomer Torque @ Max Pressure 15775 lb-ft 21388 N-mPowerPLUS™ Max Diff Pressure 1320 psi 9101 kPaPowerPLUS Torque @ Max Pressure 23662 lb-ft 32082 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 600 - 1200 gpm 2271 - 4542 lpm

Revs per Unit Volume (No Load) 0.13 rev/gal 0.034 rev/L

Speed (No Load) 77 - 155 rpm

Approx Press Drop @ 1200 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

9 5/8”6/7 6.0

Page 214: Nov mud motor handbook

206

®

AB

C

D E

Bit to Center of Stabilizer Blade A 49 in (1.24 m)Bit to Bend B 110 in (2.79 m)Bit to Top Sub C 386 in (9.80 m)Max OD of Motor at Upset for Stabilizer D 12.25 in (311 mm)Radius @ Adjusting Ring E 5.75 in (146 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 11.50 in (292 mm)Max OD of Slick Motor w/ Straight Housing 11.50 in (292 mm)Bit to Max Slick OD w/ Straight Housing 105.57 in (2681 mm)Estimated Total Weight: 7600 lbs (3447 kg)Common Top Connection: 7 5/8 REG, 8 5/8 REGCommon Btm Connection: 7 5/8 REG, 8 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 14-3/4 17-1/2 26 14-3/4 17-1/2 26 14-3/4 17-1/2 26

0.39° 1.0 0.9 0.8 2.5 3.2 4.8 1.5 1.5 1.50.78° 1.9 1.8 1.7 4.1 4.8 6.3 3.3 3.3 3.31.15° 2.8 2.7 2.4 5.7 6.3 7.7 5.0 5.0 4.91.50° 3.8 3.5 3.2 7.2 7.7 8.9 6.6 6.6 6.51.83° 5.4 4.3 3.9 8.5 9.1 10.2 8.1 8.1 8.02.12° 6.8 5.0 4.5 9.8 10.3 11.2 9.5 9.4 9.3

**2.25° 7.5 5.3 4.8 10.3 10.8 11.7 10.1 10.0 9.92.38° 8.1 5.6 5.0 10.8 11.3 12.2 10.7 10.6 10.42.60° 9.2 6.1 5.5 11.8 12.2 13.0 11.7 11.6 11.42.77° 10.0 6.8 5.9 12.5 12.9 13.6 12.5 12.4 12.22.89° 10.6 7.4 6.1 13.0 13.4 14.1 13.0 13.0 12.72.97° 11.0 7.7 6.3 13.3 13.7 14.4 13.4 13.3 13.13.00° 11.1 7.9 6.3 13.5 13.8 14.5 13.5 13.5 13.2

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 14-3/4 17-1/2 26 14-3/4 17-1/2 26 14-3/4 17-1/2 26

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.15 1.50 1.83 0.78 0.78 0.788.0° 1.15 1.83 1.83 0.39 0.78 1.50 0 0 0

12.0° 0.39 1.50 1.83 - 0 0.78 - - - 16.0° - 0.78 1.83 - - 0 - - - 20.0° - 0.39 1.83 - - - - - - 24.0° - - 1.83 - - - - - - 28.0° - - 1.83 - - - - - - 32.0° - - 1.83 - - - - - - 36.0° - - 1.15 - - - - - - 40.0° - - 0.39 - - - - - - 44.0° - - - - - - - - - 48.0° - - - - - - - - -

Specifications on this page are for an ST2 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

11 1/4” 3/4 3.6 Stage

Page 215: Nov mud motor handbook

207

Performance OutputStd Elastomer Max Diff Pressure 505 psi 3482 kPaStd Elastomer Torque @ Max Pressure 12174 lb-ft 16505 N-mPowerPLUS™ Max Diff Pressure 758 psi 5223 kPaPowerPLUS Torque @ Max Pressure 18260 lb-ft 24758 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 900 - 1500 gpm 3407 - 5678 lpm

Revs per Unit Volume (No Load) 0.12 rev/gal 0.031 rev/L

Speed (No Load) 107 - 179 rpm

Approx Press Drop @ 1500 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Theoretical Performance Curve

11 1/4”3/4 3.6

Page 216: Nov mud motor handbook

208

®

AB

C

D E

Bit to Center of Stabilizer Blade A 49 in (1.24 m)Bit to Bend B 110 in (2.79 m)Bit to Top Sub C 431 in (10.94 m)Max OD of Motor at Upset for Stabilizer D 12.25 in (311 mm)Radius @ Adjusting Ring E 5.75 in (146 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 11.50 in (292 mm)Max OD of Slick Motor w/ Straight Housing 11.50 in (292 mm)Bit to Max Slick OD w/ Straight Housing 105.57 in (2681 mm)Estimated Total Weight: 8480 lbs (3846 kg)Common Top Connection: 7 5/8 REG, 8 5/8 REGCommon Btm Connection: 7 5/8 REG, 8 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 14-3/4 17-1/2 26 14-3/4 17-1/2 26 14-3/4 17-1/2 26

0.39° 0.9 0.9 0.8 2.2 2.8 4.2 1.4 1.4 1.40.78° 1.8 1.7 1.5 3.7 4.3 5.6 3.1 3.1 3.01.15° 2.6 2.5 2.3 5.2 5.7 6.9 4.6 4.6 4.61.50° 3.5 3.3 2.9 6.5 7.0 8.1 6.1 6.1 6.01.83° 4.9 4.0 3.6 7.8 8.3 9.2 7.5 7.5 7.42.12° 6.2 4.6 4.2 9.0 9.4 10.2 8.8 8.7 8.6

**2.25° 6.8 4.9 4.4 9.5 9.9 10.7 9.3 9.3 9.22.38° 7.4 5.2 4.7 10.0 10.4 11.1 9.9 9.8 9.72.60° 8.4 5.6 5.1 10.8 11.2 11.9 10.8 10.8 10.62.77° 9.2 6.2 5.4 11.5 11.8 12.5 11.6 11.5 11.32.89° 9.7 6.8 5.7 12.0 12.3 12.9 12.1 12.0 11.82.97° 10.1 7.1 5.8 12.3 12.6 13.2 12.4 12.3 12.13.00° 10.2 7.2 5.9 12.4 12.7 13.3 12.5 12.5 12.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 14-3/4 17-1/2 26 14-3/4 17-1/2 26 14-3/4 17-1/2 26

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.5° 1.83 1.83 1.83 1.15 1.50 1.83 1.15 1.15 1.157.0° 1.15 1.83 1.83 0.39 0.78 1.50 0 0 0

10.5° 0.39 1.50 1.83 - 0 0.78 - - - 14.0° 0 1.15 1.83 - - 0 - - - 17.5° - 0.39 1.83 - - - - - - 21.0° - - 1.83 - - - - - - 24.5° - - 1.83 - - - - - - 28.0° - - 1.50 - - - - - - 31.5° - - 0.78 - - - - - - 35.0° - - 0 - - - - - - 38.5° - - - - - - - - - 42.0° - - - - - - - - -

Specifications on this page are for an ST2 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

11 1/4” 6/7 5.5 Stage

Page 217: Nov mud motor handbook

209

Performance OutputStd Elastomer Max Diff Pressure 820 psi 5654 kPaStd Elastomer Torque @ Max Pressure 19368 lb-ft 26260 N-mPowerPLUS™ Max Diff Pressure 1230 psi 8481 kPaPowerPLUS Torque @ Max Pressure 29053 lb-ft 39390 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 900 - 1800 gpm 3407 - 6814 lpm

Revs per Unit Volume (No Load) 0.09 rev/gal 0.024 rev/L

Speed (No Load) 81 - 162 rpm

Approx Press Drop @ 1800 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**Theoretical Performance Curve

11 1/4”6/7 5.5

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 218: Nov mud motor handbook

210

®

AB

C

D E

Bit to Center of Stabilizer Blade A 49 in (1.24 m)Bit to Bend B 110 in (2.79 m)Bit to Top Sub C 431 in (10.94 m)Max OD of Motor at Upset for Stabilizer D 12.25 in (311 mm)Radius @ Adjusting Ring E 5.75 in (146 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 11.50 in (292 mm)Max OD of Slick Motor w/ Straight Housing 11.50 in (292 mm)Bit to Max Slick OD w/ Straight Housing 105.57 in (2681 mm)Estimated Total Weight: 8480 lbs (3846 kg)Common Top Connection: 7 5/8 REG, 8 5/8 REGCommon Btm Connection: 7 5/8 REG, 8 5/8 REG* For additional information, including previous designs, refer to Section 9: Motor Performance Summary on page 57.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 14-3/4 17-1/2 26 14-3/4 17-1/2 26 14-3/4 17-1/2 26

0.39° 0.9 0.9 0.8 2.2 2.8 4.2 1.4 1.4 1.40.78° 1.8 1.7 1.5 3.7 4.3 5.6 3.1 3.1 3.01.15° 2.6 2.5 2.3 5.2 5.7 6.9 4.6 4.6 4.61.50° 3.5 3.3 2.9 6.5 7.0 8.1 6.1 6.1 6.01.83° 4.9 4.0 3.6 7.8 8.3 9.2 7.5 7.5 7.42.12° 6.2 4.6 4.2 9.0 9.4 10.2 8.8 8.7 8.6

**2.25° 6.8 4.9 4.4 9.5 9.9 10.7 9.3 9.3 9.22.38° 7.4 5.2 4.7 10.0 10.4 11.1 9.9 9.8 9.72.60° 8.4 5.6 5.1 10.8 11.2 11.9 10.8 10.8 10.62.77° 9.2 6.2 5.4 11.5 11.8 12.5 11.6 11.5 11.32.89° 9.7 6.8 5.7 12.0 12.3 12.9 12.1 12.0 11.82.97° 10.1 7.1 5.8 12.3 12.6 13.2 12.4 12.3 12.13.00° 10.2 7.2 5.9 12.4 12.7 13.3 12.5 12.5 12.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 14-3/4 17-1/2 26 14-3/4 17-1/2 26 14-3/4 17-1/2 26

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.5° 1.83 1.83 1.83 1.15 1.50 1.83 1.15 1.15 1.157.0° 1.15 1.83 1.83 0.39 0.78 1.50 0 0 0

10.5° 0.39 1.50 1.83 - 0 0.78 - - - 14.0° 0 1.15 1.83 - - 0 - - - 17.5° - 0.39 1.83 - - - - - - 21.0° - - 1.83 - - - - - - 24.5° - - 1.83 - - - - - - 28.0° - - 1.50 - - - - - - 31.5° - - 0.78 - - - - - - 35.0° - - 0 - - - - - - 38.5° - - - - - - - - - 42.0° - - - - - - - - -

Specifications on this page are for an ST2 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

11 1/4” 6/7 5.6 Stage

Page 219: Nov mud motor handbook

211

Theoretical Performance Curve

11 1/4”6/7 5.6

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Performance OutputStd Elastomer Max Diff Pressure 820 psi 5654 kPaStd Elastomer Torque @ Max Pressure 19377 lb-ft 26271 N-mPowerPLUS™ Max Diff Pressure 1230 psi 8481 kPaPowerPLUS Torque @ Max Pressure 29065 lb-ft 39407 N-m

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 1000 - 1800 gpm 3785 - 6814 lpm

Revs per Unit Volume (No Load) 0.09 rev/gal 0.024 rev/L

Speed (No Load) 90 - 162 rpm

Approx Press Drop @ 1800 gpm (No Load) 250 psi 1700 kpa

US STD OS 2xOS

Availability Refer to Power Section Fits on page 33 to correctly choose power section for drilling application.

[water @ 70°F (21°C)]**

Page 220: Nov mud motor handbook

212

®

AB

C

D E

Bit to Center of Stabilizer Blade A 7 in (0.18 m)Bit to Bend B 48 in (1.23 m)Bit to Top Sub C 166 in (4.21 m)Max OD of Motor at Upset for Stabilizer D 3.00 in (76 mm)Radius @ Adjusting Ring E 1.62 in (41 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 3.24 in (82 mm)Max OD of Slick Motor w/ Straight Housing 3.00 in (76 mm)Bit to Max Slick OD w/ Straight Housing 0.00 in (0 mm)Estimated Total Weight: 210 lbs (95 kg)Common Top Connection: 2 3/8 REGCommon Btm Connection: 2 3/8 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 3 1/2 4-1/4 4-1/2 3 1/2 4-1/4 4-1/2 3 1/2 4-1/4 4-1/2

0.39° 4.4 2.6 2.5 4.4 2.6 3.1 2.8 2.6 2.60.78° 9.6 5.1 5.1 9.6 6.4 7.0 8.0 5.2 5.11.15° 14.6 8.7 7.5 14.6 10.1 10.7 12.9 7.6 7.61.50° 19.3 13.2 11.3 19.3 13.7 14.2 17.5 11.0 11.11.83° 23.8 17.6 15.6 23.8 17.6 17.5 21.9 14.3 14.42.12° 27.7 21.4 19.4 27.7 21.4 20.4 25.7 17.9 17.3

**2.25° 29.4 23.1 21.0 29.4 23.1 21.7 27.5 19.6 18.62.38° 31.2 24.8 22.7 31.2 24.8 23.0 29.2 21.4 20.02.60° 34.1 27.6 25.6 34.1 27.6 25.6 32.1 24.3 22.22.77° 36.4 29.8 27.8 36.4 29.8 27.8 34.3 26.5 23.92.89° 38.0 31.4 29.3 38.0 31.4 29.3 35.9 28.1 25.52.97° 39.1 32.5 30.4 39.1 32.5 30.4 37.0 29.1 26.63.00° 39.5 32.9 30.8 39.5 32.9 30.8 37.4 29.5 27.0

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 3 1/2 4-1/4 4-1/2 3 1/2 4-1/4 4-1/2 3 1/2 4-1/4 4-1/2

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.505.5° 1.83 1.83 1.83 1.83 1.15 1.15 1.83 0.78 0.78

11.0° 1.83 1.83 1.83 1.83 0.78 0.78 1.83 0.39 0.3916.5° 1.50 1.83 1.83 1.50 0.39 0.39 1.50 0.00 0.0022.0° 1.15 1.83 1.83 1.15 - 0.00 1.15 - - 27.5° 0.78 1.83 1.83 0.78 - - 0.78 - - 33.0° 0.39 1.50 1.50 0.39 - - 0.39 - - 38.5° 0.00 1.15 1.15 0.00 - - 0.00 - - 44.0° - 0.78 0.78 - - - - - - 49.5° - 0.39 0.39 - - - - - - 55.0° - 0.00 0.00 - - - - - - 60.5° - - - - - - - - - 66.0° - - - - - - - - -

Specifications on this page are for an ST2 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

2 7/8” 5/6 3.5 Stage HEMIDRIL CT

Page 221: Nov mud motor handbook

213

HEMIDRIL®

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 60 - 120 gpm 227 - 454 lpm

Revs per Unit Volume (No Load) 3.33 rev/gal 0.88 rev/L

Speed (No Load) 200 - 400 rpm

Approx Press Drop @ 120 gpm (No Load) 150 psi 1050 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 883 psi 6088 kPa

HEMIDRIL Torque @ Max Pressure 644 lb-ft 873 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

2 7/8”5/6 3.5

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 222: Nov mud motor handbook

214

®

AB

C

D E

Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 304 in (7.71 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1180 lbs (535 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.8 1.4 1.3 1.9 2.1 2.4 1.4 1.4 1.50.78° 4.5 3.8 2.7 4.5 4.4 4.7 4.0 3.9 3.91.15° 7.1 6.3 4.8 7.1 6.7 6.9 6.7 6.2 6.21.50° 9.5 8.7 7.2 9.5 8.8 9.0 9.2 8.3 8.41.83° 11.8 11.0 9.5 11.8 11.0 11.0 11.6 10.6 10.42.12° 13.8 13.0 11.4 13.8 13.0 12.7 13.6 12.7 12.2

**2.25° 14.7 13.9 12.3 14.7 13.9 13.5 14.6 13.6 13.02.38° 15.6 14.8 13.2 15.6 14.8 14.3 15.5 14.5 13.82.60° 17.1 16.3 14.7 17.1 16.3 15.6 17.1 16.1 15.22.77° 18.3 17.5 15.9 18.3 17.5 16.6 18.3 17.3 16.22.89° 19.1 18.3 16.7 19.1 18.3 17.3 19.2 18.2 17.02.97° 19.7 18.9 17.2 19.7 18.9 17.8 19.7 18.8 17.53.00° 19.9 19.1 17.5 19.9 19.1 17.9 20.0 19.0 17.7

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.504.0° 1.83 1.83 1.83 1.83 1.83 1.15 1.83 1.83 1.156.0° 1.50 1.83 1.83 1.50 0.78 0.78 1.50 1.83 0.788.0° 1.15 1.50 1.83 1.15 1.50 0.78 1.15 0.39 0.39

10.0° 1.15 1.15 1.50 1.15 0.39 0.39 0.78 0.00 0.0012.0° 0.78 0.78 1.15 0.78 0.00 0.00 0.78 0.00 0.0014.0° 0.39 0.78 1.15 - - - - - - 16.0° 0.39 0.39 0.78 - - - - - - 18.0° 0.00 0.00 0.39 - - - - - - 20.0° - 0.00 0.39 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

5” 4/5 6.3 Stage HEMIDRIL

Page 223: Nov mud motor handbook

215

HEMIDRIL®

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 100 - 250 gpm 379 - 946 lpm

Revs per Unit Volume (No Load) 0.98 rev/gal 0.259 rev/L

Speed (No Load) 98 - 245 rpm

Approx Press Drop @ 250 gpm (No Load) 300 psi 2050 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 1435 psi 9894 kPa

HEMIDRIL Torque @ Max Pressure 3830 lb-ft 5193 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

5”4/5 6.3

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 224: Nov mud motor handbook

216

®

AB

C

D E

Bit to Center of Stabilizer Blade A 20 in (0.50 m)Bit to Bend B 61 in (1.55 m)Bit to Top Sub C 294 in (7.46 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.13 in (130 mm)Bit to Max Slick OD w/ Straight Housing 38.12 in (968 mm)Estimated Total Weight: 1140 lbs (517 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.9 1.4 1.4 2.0 2.2 2.5 1.5 1.5 1.50.78° 4.7 3.9 2.8 4.7 4.6 4.9 4.1 4.0 4.01.15° 7.3 6.5 5.0 7.3 6.9 7.1 6.9 6.3 6.31.50° 9.8 9.0 7.4 9.8 9.0 9.3 9.5 8.6 8.61.83° 12.2 11.3 9.8 12.2 11.3 11.3 11.9 10.9 10.72.12° 14.2 13.4 11.8 14.2 13.4 13.0 14.1 13.1 12.5

**2.25° 15.2 14.3 12.7 15.2 14.3 13.8 15.0 14.0 13.32.38° 16.1 15.3 13.6 16.1 15.3 14.6 16.0 15.0 14.22.60° 17.7 16.8 15.2 17.7 16.8 16.0 17.6 16.6 15.62.77° 18.9 18.0 16.4 18.9 18.0 17.0 18.9 17.9 16.62.89° 19.7 18.9 17.2 19.7 18.9 17.7 19.7 18.7 17.42.97° 20.3 19.4 17.8 20.3 19.4 18.2 20.3 19.3 17.93.00° 20.5 19.6 18.0 20.5 19.6 18.4 20.6 19.6 18.1

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.504.0° 1.83 1.83 1.83 1.83 1.83 1.15 1.83 1.83 1.156.0° 1.50 1.83 1.83 1.50 0.78 0.78 1.50 1.50 0.788.0° 1.15 1.50 1.83 1.15 1.50 0.78 1.15 0.39 0.39

10.0° 1.15 1.15 1.50 1.15 0.39 0.39 0.78 0.00 0.0012.0° 0.78 0.78 1.15 0.78 0.00 0.00 0.78 0.00 0.0014.0° 0.39 0.78 1.15 - - - - - - 16.0° 0.39 0.39 0.78 - - - - - - 18.0° 0.00 0.00 0.39 - - - - - - 20.0° - 0.00 0.39 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

5” 7/8 3.8 Stage HEMIDRIL

Page 225: Nov mud motor handbook

217

HEMIDRIL®

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

5”7/8 3.8

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 150 - 250 gpm 568 - 946 lpm

Revs per Unit Volume (No Load) 0.52 rev/gal 0.137 rev/L

Speed (No Load) 78 - 130 rpm

Approx Press Drop @ 250 gpm (No Load) 350 psi 2400 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 865 psi 5964 kPa

HEMIDRIL Torque @ Max Pressure 4480 lb-ft 6074 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

Page 226: Nov mud motor handbook

218

®

AB

C

D E

Bit to Center of Stabilizer Blade A 21 in (0.53 m)Bit to Bend B 46 in (1.17 m)Bit to Top Sub C 279 in (7.07 m)Max OD of Motor at Upset for Stabilizer D 5.56 in (141 mm)Radius @ Adjusting Ring E 2.78 in (71 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 5.56 in (141 mm)Max OD of Slick Motor w/ Straight Housing 5.56 in (141 mm)Bit to Max Slick OD w/ Straight Housing 6.70 in (170 mm)Estimated Total Weight: 1080 lbs (490 kg)Common Top Connection: 3 1/2 REG, 3 1/2 IFCommon Btm Connection: 3 1/2 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.39° 1.6 1.5 1.4 2.3 2.5 2.8 1.7 1.7 1.70.78° 4.5 3.4 2.9 4.9 5.1 5.4 4.5 4.5 4.51.15° 7.2 6.2 4.2 7.5 7.6 7.9 7.1 7.1 7.11.50° 9.9 8.8 6.7 9.9 10.0 10.3 9.5 9.5 9.51.83° 12.3 11.3 9.2 12.3 12.2 12.5 12.1 11.9 11.92.12° 14.5 13.4 11.3 14.5 14.2 14.4 14.3 13.9 13.9

**2.25° 15.5 14.4 12.3 15.5 15.1 15.3 15.3 14.8 14.82.38° 16.4 15.3 13.2 16.4 16.0 16.2 16.3 15.7 15.72.60° 18.1 17.0 14.8 18.1 17.5 17.6 18.0 17.3 17.32.77° 19.3 18.2 16.1 19.3 18.6 18.8 19.4 18.5 18.52.89° 20.2 19.1 17.0 20.2 19.4 19.6 20.3 19.3 19.32.97° 20.8 19.7 17.5 20.8 20.0 20.1 20.9 19.9 19.93.00° 21.1 19.9 17.8 21.1 20.2 20.3 21.1 20.1 20.1

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 6 6-1/4 6-3/4 6 6-1/4 6-3/4 6 6-1/4 6-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.507.5° 1.50 1.50 1.83 1.50 1.50 1.50 1.15 1.15 1.15

10.0° 1.15 1.15 1.50 1.15 1.15 1.15 0.78 0.78 0.7812.5° 0.78 0.78 1.15 0.78 0.78 0.78 0.78 0.39 0.3915.0° 0.39 0.78 1.15 0.39 0.39 0.39 0.39 0.39 0.3917.5° 0.00 0.39 0.78 0.00 0.00 0.00 0.00 0.00 0.0020.0° 0.00 0.00 0.39 - - - - - - 22.5° - - 0.00 - - - - - - 25.0° - - 0.00 - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an SR3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

5” 7/8 3.8 Stage HEMIDRIL SR3

Page 227: Nov mud motor handbook

219

HEMIDRIL® Short RadiusRecommended Operating Limits

Fit Availability for All Elastomers

Flow Range 150 - 250 gpm 568 - 946 lpm

Revs per Unit Volume (No Load) 0.52 rev/gal 0.137 rev/L

Speed (No Load) 78 - 130 rpm

Approx Press Drop @ 250 gpm (No Load) 350 psi 2400 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 865 psi 5964 kPa

HEMIDRIL Torque @ Max Pressure 4480 lb-ft 6074 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

5”7/8 3.8

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 228: Nov mud motor handbook

220

®

AB

C

D E

Bit to Center of Stabilizer Blade A 28 in (0.71 m)Bit to Bend B 77 in (1.96 m)Bit to Top Sub C 361 in (9.16 m)Max OD of Motor at Upset for Stabilizer D 7.38 in (187 mm)Radius @ Adjusting Ring E 3.50 in (89 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.00 in (178 mm)Max OD of Slick Motor w/ Straight Housing 6.63 in (168 mm)Bit to Max Slick OD w/ Straight Housing 8.90 in (226 mm)Estimated Total Weight: 2190 lbs (993 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.39° 1.1 1.1 1.1 2.0 2.3 2.4 1.5 1.5 1.50.78° 3.2 2.2 2.2 4.0 4.2 4.3 3.5 3.5 3.51.15° 5.3 4.1 3.6 5.9 6.1 6.2 5.5 5.5 5.51.50° 7.3 6.1 5.6 7.6 7.8 7.9 7.3 7.3 7.31.83° 9.2 8.0 7.5 9.3 9.5 9.5 9.0 9.0 9.02.12° 10.9 9.6 9.1 10.9 10.9 11.0 10.7 10.6 10.6

**2.25° 11.7 10.3 9.8 11.7 11.6 11.6 11.5 11.2 11.22.38° 12.4 11.1 10.6 12.4 12.2 12.3 12.3 11.9 11.92.60° 13.7 12.3 11.8 13.7 13.3 13.4 13.7 13.1 13.12.77° 14.6 13.3 12.8 14.6 14.1 14.2 14.7 14.0 14.02.89° 15.3 14.0 13.5 15.3 14.7 14.8 15.4 14.6 14.62.97° 15.8 14.5 13.9 15.8 15.1 15.2 15.9 15.0 15.03.00° 16.0 14.6 14.1 16.0 15.3 15.3 16.1 15.2 15.2

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.83 1.838.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.15 1.50 1.50

10.0° 1.15 1.50 1.50 1.15 1.15 1.50 1.15 1.15 1.1512.0° 0.78 1.15 1.15 0.78 0.78 0.78 0.78 0.78 0.7814.0° 0.39 0.78 0.78 0.39 0.39 0.78 0.39 0.39 0.3916.0° 0.00 0.39 0.78 0.00 0.39 0.39 0.00 0.00 0.0018.0° 0.00 0.00 0.39 0.00 0.00 0.00 - - - 20.0° - 0.00 0.00 - - - - - - 22.0° - - - - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 1/4” 7/8 2.9 Stage HEMIDRIL

Page 229: Nov mud motor handbook

221

HEMIDRIL®

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 200 - 500 gpm 757 - 1893 lpm

Revs per Unit Volume (No Load) 0.17 rev/gal 0.045 rev/L

Speed (No Load) 34 - 85 rpm

Approx Press Drop @ 500 gpm (No Load) 250 psi 1700 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 660 psi 4551 kPa

HEMIDRIL Torque @ Max Pressure 9750 lb-ft 13219 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

6 1/4”7/8 2.9

Page 230: Nov mud motor handbook

222

®

AB

C

D E

Bit to Center of Stabilizer Blade A 28 in (0.71 m)Bit to Bend B 77 in (1.96 m)Bit to Top Sub C 334 in (8.49 m)Max OD of Motor at Upset for Stabilizer D 7.38 in (187 mm)Radius @ Adjusting Ring E 3.50 in (89 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.00 in (178 mm)Max OD of Slick Motor w/ Straight Housing 6.63 in (168 mm)Bit to Max Slick OD w/ Straight Housing 8.90 in (226 mm)Estimated Total Weight: 2030 lbs (921 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.39° 1.2 1.2 1.2 2.2 2.5 2.6 1.5 1.5 1.50.78° 3.4 2.4 2.4 4.3 4.6 4.7 3.7 3.7 3.71.15° 5.7 4.4 3.9 6.2 6.5 6.6 5.8 5.8 5.81.50° 7.9 6.5 6.0 8.1 8.3 8.4 7.7 7.7 7.71.83° 9.9 8.5 8.0 9.9 10.1 10.2 9.6 9.6 9.62.12° 11.7 10.3 9.7 11.7 11.6 11.7 11.5 11.2 11.2

**2.25° 12.5 11.1 10.5 12.5 12.3 12.4 12.3 11.9 11.92.38° 13.3 11.9 11.3 13.3 13.0 13.0 13.2 12.6 12.62.60° 14.6 13.2 12.7 14.6 14.1 14.2 14.6 13.8 13.82.77° 15.7 14.2 13.7 15.7 15.0 15.1 15.7 14.8 14.82.89° 16.4 15.0 14.4 16.4 15.6 15.7 16.5 15.5 15.52.97° 16.9 15.5 14.9 16.9 16.1 16.1 17.0 15.9 15.93.00° 17.1 15.6 15.1 17.1 16.2 16.3 17.2 16.1 16.1

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4 7-7/8 8-1/2 8-3/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.836.0° 1.50 1.83 1.83 1.50 1.83 1.83 1.50 1.83 1.838.0° 1.50 1.83 1.83 1.50 1.50 1.50 1.15 1.50 1.50

10.0° 1.15 1.50 1.50 1.15 1.15 1.15 0.78 1.15 1.1512.0° 0.78 1.15 1.15 0.78 0.78 0.78 0.78 0.78 0.7814.0° 0.39 0.78 0.78 0.39 0.39 0.78 0.39 0.39 0.3916.0° 0.00 0.39 0.78 0.00 0.39 0.39 0.00 0.00 0.0018.0° 0.00 0.39 0.39 0.00 0.00 0.00 - - - 20.0° - 0.00 0.00 - - - - - - 22.0° - - - - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 1/4” 7/8 4.8 Stage HEMIDRIL

Page 231: Nov mud motor handbook

223

HEMIDRIL®

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 150 - 400 gpm 568 - 1514 lpm

Revs per Unit Volume (No Load) 0.34 rev/gal 0.09 rev/L

Speed (No Load) 51 - 136 rpm

Approx Press Drop @ 400 gpm (No Load) 300 psi 2050 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 1090 psi 7515 kPa

HEMIDRIL Torque @ Max Pressure 8450 lb-ft 11457 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

6 1/4”7/8 4.8

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 232: Nov mud motor handbook

224

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 351 in (8.90 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2580 lbs (1170 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.1 1.1 1.1 2.0 2.1 2.6 1.4 1.4 1.40.78° 2.9 2.4 2.2 4.0 4.1 4.5 3.5 3.5 3.51.15° 5.1 4.6 3.3 5.8 5.9 6.3 5.5 5.5 5.51.50° 7.1 6.6 4.4 7.6 7.7 8.0 7.3 7.3 7.31.83° 9.0 8.5 6.2 9.3 9.3 9.7 9.1 9.1 9.12.12° 10.7 10.2 7.9 10.7 10.8 11.1 10.6 10.6 10.6

**2.25° 11.5 11.0 8.6 11.5 11.5 11.8 11.4 11.3 11.32.38° 12.3 11.7 9.4 12.3 12.1 12.4 12.3 12.0 12.02.60° 13.5 13.0 10.6 13.5 13.2 13.5 13.6 13.2 13.22.77° 14.5 14.0 11.6 14.5 14.1 14.3 14.7 14.1 14.12.89° 15.2 14.7 12.3 15.2 14.7 14.9 15.4 14.8 14.72.97° 15.7 15.2 12.8 15.7 15.2 15.3 15.9 15.3 15.13.00° 15.9 15.3 12.9 15.9 15.3 15.5 16.1 15.4 15.3

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.834.0° 1.83 1.83 1.83 1.83 1.50 1.50 1.83 1.50 1.506.0° 1.83 1.83 1.83 1.15 1.15 1.15 1.83 1.15 1.158.0° 1.50 1.50 1.83 0.78 0.78 0.78 0.78 0.78 0.78

10.0° 1.15 1.15 1.83 0.39 0.39 0.39 0.39 0.39 0.3912.0° 0.78 1.15 1.50 0.00 0.00 0.00 0.00 0.00 0.0014.0° 0.39 0.78 1.15 - - 0.00 - - - 16.0° 0.39 0.39 1.15 - - - - - - 18.0° 0.00 0.00 0.78 - - - - - - 20.0° - - 0.39 - - - - - - 22.0° - - 0.00 - - - - - - 24.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 7/8” 7/8 2.9 Stage HEMIDRIL

Page 233: Nov mud motor handbook

225

HEMIDRIL®

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.17 rev/gal 0.045 rev/L

Speed (No Load) 51 - 102 rpm

Approx Press Drop @ 600 gpm (No Load) 300 psi 2050 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 900 psi 6205 kPa

HEMIDRIL Torque @ Max Pressure 12955 lb-ft 17565 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

6 7/8”7/8 2.9

Page 234: Nov mud motor handbook

226

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 255 in (6.48 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 1880 lbs (853 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.5 1.5 1.4 2.8 2.9 3.7 1.7 1.7 1.70.78° 4.0 3.3 2.9 5.2 5.4 6.1 4.3 4.3 4.31.15° 6.8 6.1 4.3 7.5 7.6 8.3 6.7 6.7 6.71.50° 9.4 8.8 5.8 9.7 9.8 10.4 9.1 9.0 9.01.83° 12.0 11.3 8.2 12.0 11.8 12.4 11.4 11.2 11.22.12° 14.2 13.4 10.4 14.2 13.6 14.2 13.8 13.2 13.1

**2.25° 15.2 14.4 11.3 15.2 14.4 15.0 14.9 14.0 14.02.38° 16.1 15.4 12.3 16.1 15.4 15.8 16.0 15.0 14.92.60° 17.8 17.1 13.9 17.8 17.1 17.1 17.8 16.8 16.32.77° 19.1 18.4 15.2 19.1 18.4 18.1 19.2 18.2 17.42.89° 20.0 19.3 16.1 20.0 19.3 18.9 20.2 19.2 18.22.97° 20.6 19.9 16.7 20.6 19.9 19.3 20.9 19.9 18.73.00° 20.9 20.1 16.9 20.9 20.1 19.5 21.1 20.1 18.9

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.833.0° 1.83 1.83 1.83 1.83 1.50 1.83 1.83 1.15 1.156.0° 1.50 1.83 1.83 1.50 1.15 1.15 0.78 0.78 0.789.0° 1.15 1.50 1.83 0.78 0.78 0.78 0.39 0.39 0.39

12.0° 0.78 1.15 1.83 0.00 0.39 0.39 0.00 0.00 0.0015.0° 0.78 0.78 1.50 - - 0.00 - - - 18.0° 0.39 0.39 1.15 - - - - - - 21.0° 0.00 0.00 0.78 - - - - - - 24.0° - - 0.39 - - - - - - 27.0° - - 0.00 - - - - - - 30.0° - - 0.00 - - - - - - 33.0° - - - - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 7/8” 7/8 3.0 Stage HEMIDRIL

Page 235: Nov mud motor handbook

227

HEMIDRIL®

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.3 rev/gal 0.079 rev/L

Speed (No Load) 90 - 180 rpm

Approx Press Drop @ 600 gpm (No Load) 350 psi 2400 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 685 psi 4723 kPa

HEMIDRIL Torque @ Max Pressure 6510 lb-ft 8826 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

6 7/8”7/8 3.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 236: Nov mud motor handbook

228

®

AB

C

D E

Bit to Center of Stabilizer Blade A 25 in (0.63 m)Bit to Bend B 55 in (1.40 m)Bit to Top Sub C 234 in (5.96 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.63 in (194 mm)Max OD of Slick Motor w/ Straight Housing 7.63 in (194 mm)Bit to Max Slick OD w/ Straight Housing 0.00 in (0 mm)Estimated Total Weight: 1720 lbs (780 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.6 1.6 1.5 3.3 3.5 4.4 2.1 2.1 2.10.78° 3.3 3.2 3.1 6.1 6.3 7.1 5.2 5.2 5.21.15° 6.4 5.4 4.6 8.8 9.0 9.7 8.1 8.1 8.11.50° 9.2 8.3 5.9 11.3 11.5 12.2 10.8 10.8 10.81.83° 11.9 10.9 7.2 13.7 13.9 14.5 13.4 13.4 13.42.12° 14.3 13.3 9.1 15.8 15.9 16.5 15.7 15.6 15.6

**2.25° 15.3 14.3 10.1 16.7 16.9 17.4 16.7 16.7 16.62.38° 16.4 15.4 11.1 17.7 17.8 18.3 17.7 17.7 17.62.60° 18.2 17.2 12.9 19.3 19.4 19.9 19.4 19.4 19.32.77° 19.6 18.5 14.2 20.5 20.6 21.1 20.7 20.7 20.72.89° 20.5 19.5 15.2 21.4 21.5 21.9 21.7 21.7 21.62.97° 21.2 20.2 15.8 21.9 22.0 22.5 22.3 22.3 22.23.00° 21.4 20.4 16.0 22.1 22.2 22.7 22.5 22.5 22.5

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.50 1.503.0° 1.83 1.83 1.83 1.50 1.50 1.50 1.15 1.15 1.156.0° 1.50 1.83 1.83 1.15 1.15 1.15 0.78 0.78 0.789.0° 1.50 1.50 1.83 0.78 0.78 0.78 0.39 0.39 0.39

12.0° 1.15 1.15 1.83 0.39 0.39 0.39 0.00 0.00 0.0015.0° 0.78 0.78 1.83 0.00 0.00 0.00 - - - 18.0° 0.39 0.78 1.50 - - - - - - 21.0° 0.00 0.39 1.15 - - - - - - 24.0° - 0.00 0.78 - - - - - - 27.0° - - 0.39 - - - - - - 30.0° - - 0.39 - - - - - - 33.0° - - 0.00 - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an SR3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 7/8” 7/8 3.0 Stage HEMIDRIL SR3

Page 237: Nov mud motor handbook

229

HEMIDRIL® Short Radius

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.3 rev/gal 0.079 rev/L

Speed (No Load) 90 - 180 rpm

Approx Press Drop @ 600 gpm (No Load) 350 psi 2400 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 685 psi 4723 kPa

HEMIDRIL Torque @ Max Pressure 6510 lb-ft 8826 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

6 7/8”7/8 3.0

Page 238: Nov mud motor handbook

230

®

AB

C

D E

Bit to Center of Stabilizer Blade A 24 in (0.61 m)Bit to Bend B 76 in (1.93 m)Bit to Top Sub C 325 in (8.25 m)Max OD of Motor at Upset for Stabilizer D 7.63 in (194 mm)Radius @ Adjusting Ring E 3.75 in (95 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 7.50 in (191 mm)Max OD of Slick Motor w/ Straight Housing 7.13 in (181 mm)Bit to Max Slick OD w/ Straight Housing 51.36 in (1305 mm)Estimated Total Weight: 2390 lbs (1084 kg)Common Top Connection: 4 1/2 REG, 4 1/2 IF, 4 1/2 H-90, 4 1/2 XH, 5 H-90Common Btm Connection: 4 1/2 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.39° 1.2 1.2 1.2 2.2 2.3 2.8 1.5 1.5 1.50.78° 3.1 2.6 2.4 4.2 4.3 4.8 3.7 3.7 3.71.15° 5.4 4.9 3.5 6.2 6.3 6.8 5.8 5.8 5.81.50° 7.6 7.1 4.7 8.1 8.2 8.6 7.7 7.7 7.71.83° 9.7 9.1 6.7 9.8 9.9 10.3 9.6 9.6 9.62.12° 11.5 10.9 8.4 11.5 11.4 11.8 11.3 11.2 11.2

**2.25° 12.3 11.7 9.2 12.3 12.1 12.5 12.2 12.0 11.92.38° 13.1 12.5 10.0 13.1 12.8 13.2 13.1 12.7 12.72.60° 14.5 13.9 11.4 14.5 14.0 14.3 14.6 13.9 13.92.77° 15.5 14.9 12.4 15.5 14.9 15.2 15.7 14.9 14.92.89° 16.3 15.7 13.1 16.3 15.7 15.8 16.5 15.8 15.52.97° 16.8 16.2 13.6 16.8 16.2 16.2 17.0 16.3 16.03.00° 17.0 16.4 13.8 17.0 16.4 16.4 17.2 16.5 16.1

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8 8-1/2 8-3/4 9-7/8

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.505.0° 1.83 1.83 1.83 1.15 1.15 1.50 1.83 1.15 1.157.5° 1.50 1.50 1.83 0.78 0.78 1.15 0.78 0.78 0.78

10.0° 1.15 1.15 1.83 0.39 0.39 0.39 0.39 0.39 0.3912.5° 0.78 0.78 1.50 0.00 0.00 0.00 0.00 0.00 - 15.0° 0.39 0.39 1.15 - - - - - - 17.5° 0.00 0.39 0.78 - - - - - - 20.0° - 0.00 0.39 - - - - - - 22.5° - - 0.00 - - - - - - 25.0° - - - - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

6 7/8” 7/8 5.0 Stage HEMIDRIL

Page 239: Nov mud motor handbook

231

HEMIDRIL®

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 600 gpm 1136 - 2271 lpm

Revs per Unit Volume (No Load) 0.3 rev/gal 0.079 rev/L

Speed (No Load) 90 - 180 rpm

Approx Press Drop @ 600 gpm (No Load) 350 psi 2400 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 1140 psi 7860 kPa

HEMIDRIL Torque @ Max Pressure 10830 lb-ft 14684 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

6 7/8”7/8 5.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 240: Nov mud motor handbook

232

®

AB

C

D E

Bit to Center of Stabilizer Blade A 36 in 0.92 m)Bit to Bend B 87 in 2.20 m)Bit to Top Sub C 351 in (8.93 m)Max OD of Motor at Upset for Stabilizer D 8.88 in (226 mm)Radius @ Adjusting Ring E 4.19 in (106 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 8.38 in (213 mm)Max OD of Slick Motor w/ Straight Housing 8.13 in (207 mm)Bit to Max Slick OD w/ Straight Housing 61.87 in (1571 mm)Estimated Total Weight: 3500 lbs (1588 kg)Common Top Connection: 6 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.39° 1.1 1.1 1.1 2.3 2.5 3.1 1.6 1.6 1.60.78° 2.2 2.2 2.1 4.2 4.5 5.0 3.6 3.6 3.61.15° 4.2 3.2 3.2 6.0 6.3 6.8 5.5 5.5 5.51.50° 6.2 4.9 4.1 7.7 8.0 8.4 7.3 7.3 7.31.83° 8.1 6.8 5.0 9.4 9.6 10.0 9.0 9.0 9.02.12° 9.8 8.4 5.8 10.8 11.0 11.4 10.5 10.5 10.5

**2.25° 10.5 9.1 6.4 11.4 11.6 12.0 11.2 11.2 11.22.38° 11.2 9.9 7.1 12.1 12.3 12.6 11.9 11.9 11.82.60° 12.5 11.1 8.3 13.2 13.3 13.7 13.0 13.0 13.02.77° 13.5 12.1 9.2 14.0 14.2 14.5 13.9 13.9 13.82.89° 14.1 12.7 9.9 14.6 14.7 15.1 14.5 14.5 14.52.97° 14.6 13.2 10.3 15.0 15.1 15.4 14.9 14.9 14.93.00° 14.8 13.4 10.5 15.1 15.3 15.6 15.1 15.1 15.0

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4 9-7/8 10-5/8 12-1/4

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.50 1.83 1.83 1.83 1.83 1.83 1.50 1.50 1.507.5° 1.15 1.50 1.83 1.15 1.50 1.50 1.15 1.15 1.15

10.0° 0.78 1.15 1.83 0.78 0.78 1.15 0.78 0.78 0.7812.5° 0.39 0.78 1.83 0.39 0.39 0.78 0.00 0.00 0.0015.0° 0.00 0.39 1.15 0.00 0.00 0.00 - - - 17.5° - 0.00 0.78 - - - - - - 20.0° - - 0.39 - - - - - - 22.5° - - 0.00 - - - - - - 25.0° - - - - - - - - - 27.5° - - - - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

8” 7/8 4.0 Stage HEMIDRIL

Page 241: Nov mud motor handbook

233

HEMIDRIL®

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 300 - 900 gpm 1136 - 3407 lpm

Revs per Unit Volume (No Load) 0.17 rev/gal 0.045 rev/L

Speed (No Load) 51 - 153 rpm

Approx Press Drop @ 900 gpm (No Load) 400 psi 2750 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 910 psi 6274 kPa

HEMIDRIL Torque @ Max Pressure 15155 lb-ft 20547 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

8”7/8 4.0

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 242: Nov mud motor handbook

234

®

AB

C

D E

Bit to Center of Stabilizer Blade A 43 in (1.09 m)Bit to Bend B 98 in (2.49 m)Bit to Top Sub C 408 in (10.36 m)Max OD of Motor at Upset for Stabilizer D 10.75 in (273 mm)Radius @ Adjusting Ring E 5.00 in (127 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 10.00 in (254 mm)Max OD of Slick Motor w/ Straight Housing 9.75 in (248 mm)Bit to Max Slick OD w/ Straight Housing 13.69 in (348 mm)Estimated Total Weight: 5880 lbs (2667 kg)Common Top Connection: 6 5/8 REG, 7 5/8 REG, 7 H-90Common Btm Connection: 6 5/8 REG, 7 5/8 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.39° 1.0 0.9 0.9 2.1 2.8 3.4 1.4 1.4 1.50.78° 1.9 1.8 1.8 3.8 4.4 5.0 3.2 3.2 3.21.15° 2.9 2.7 2.6 5.4 5.9 6.5 4.9 4.9 4.91.50° 4.6 3.5 3.4 6.9 7.4 7.9 6.5 6.5 6.41.83° 6.2 4.3 4.1 8.3 8.7 9.2 8.0 8.0 7.92.12° 7.6 5.0 4.8 9.5 9.9 10.3 9.3 9.3 9.2

**2.25° 8.2 5.3 5.1 10.0 10.5 10.9 9.9 9.9 9.82.38° 8.9 5.6 5.4 10.6 11.0 11.4 10.5 10.5 10.42.60° 9.9 6.7 5.9 11.5 11.9 12.2 11.5 11.5 11.42.77° 10.7 7.5 6.3 12.3 12.6 12.9 12.3 12.2 12.22.89° 11.3 8.0 6.5 12.8 13.1 13.4 12.8 12.8 12.72.97° 11.7 8.4 6.7 13.1 13.4 13.7 13.2 13.1 13.13.00° 11.9 8.5 6.8 13.2 13.6 13.8 13.3 13.3 13.2

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2 12-1/4 14-3/4 17-1/2

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.832.5° 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.83 1.835.0° 1.83 1.83 1.83 1.50 1.83 1.83 1.50 1.50 1.507.5° 1.15 1.83 1.83 1.15 1.15 1.50 0.78 0.78 0.78

10.0° 0.78 1.83 1.83 0.39 0.78 1.15 0.39 0.39 0.3912.5° 0.39 1.50 1.83 0.00 0.39 0.39 - - - 15.0° 0.00 1.15 1.83 - - 0.00 - - - 17.5° - 0.78 1.83 - - - - - - 20.0° - 0.00 1.50 - - - - - - 22.5° - - 0.78 - - - - - - 25.0° - - 0.39 - - - - - - 27.5° - - 0.00 - - - - - - 30.0° - - - - - - - - -

Specifications on this page are for an ST3 motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

9 5/8” 7/8 4.8 Stage HEMIDRIL

Page 243: Nov mud motor handbook

235

HEMIDRIL®

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 600 - 1200 gpm 2271 - 4542 lpm

Revs per Unit Volume (No Load) 0.11 rev/gal 0.029 rev/L

Speed (No Load) 66 - 132 rpm

Approx Press Drop @ 1200 gpm (No Load) 350 psi 2400 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 1090 psi 7515 kPa

HEMIDRIL Torque @ Max Pressure 26160 lb-ft 35468 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

9 5/8”7/8 4.8

Page 244: Nov mud motor handbook

236

®

AB

C

D E

Bit to Center of Stabilizer Blade A 49 in (1.24 m)Bit to Bend B 110 in (2.79 m)Bit to Top Sub C 432 in (10.98 m)Max OD of Motor at Upset for Stabilizer D 12.25 in (311 mm)Radius @ Adjusting Ring E 5.75 in (146 mm)Max Effective OD of Slick Motor @ Adjusting Ring @ 0° 11.50 in (292 mm)Max OD of Slick Motor w/ Straight Housing 11.50 in (292 mm)Bit to Max Slick OD w/ Straight Housing 105.57 in (2681 mm)Estimated Total Weight: 8510 lbs (3860 kg)Common Top Connection: 7 5/8 REG, 8 5/8 REGCommon Btm Connection: 7 5/8 REG, 8 5/8 REG* For additional specs, including older designs, refer to Summary Tables on page 57 at the beginning of this section.

Bend Setting

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg 14-3/4 17-1/2 26 14-3/4 17-1/2 26 14-3/4 17-1/2 26

0.39° 0.9 0.8 0.8 2.2 2.8 4.2 1.4 1.4 1.40.78° 1.8 1.7 1.5 3.7 4.3 5.6 3.0 3.0 3.01.15° 2.6 2.5 2.3 5.2 5.7 6.8 4.6 4.6 4.61.50° 3.5 3.3 2.9 6.5 7.0 8.0 6.1 6.1 6.01.83° 4.9 4.0 3.6 7.8 8.3 9.2 7.5 7.5 7.42.12° 6.2 4.6 4.1 8.9 9.3 10.2 8.8 8.7 8.6

**2.25° 6.8 4.9 4.4 9.4 9.8 10.6 9.3 9.3 9.12.38° 7.4 5.2 4.7 10.0 10.3 11.1 9.9 9.8 9.72.60° 8.4 5.6 5.1 10.8 11.2 11.8 10.8 10.7 10.62.77° 9.1 6.2 5.4 11.5 11.8 12.4 11.5 11.5 11.32.89° 9.7 6.7 5.7 11.9 12.3 12.9 12.0 12.0 11.82.97° 10.0 7.1 5.8 12.3 12.6 13.1 12.4 12.3 12.13.00° 10.2 7.2 5.9 12.4 12.7 13.2 12.5 12.4 12.2

** 2.25° only available with a 2.38° Adjustable Assembly

Hole Curvature

Slick Single Stabilizer Two StabilizersHole Size Hole Size Hole Size

Deg/100ft 14-3/4 17-1/2 26 14-3/4 17-1/2 26 14-3/4 17-1/2 26

0.0° 1.83 1.83 1.83 1.83 1.83 1.83 1.50 1.50 1.503.0° 1.83 1.83 1.83 1.15 1.50 1.83 0.78 0.78 0.786.0° 1.15 1.83 1.83 0.39 0.78 1.50 0.00 0.00 0.009.0° 0.78 1.83 1.83 - 0.00 0.78 - - -

12.0° 0.00 1.15 1.83 - - 0.00 - - - 15.0° - 0.39 1.83 - - - - - - 18.0° - 0.00 1.83 - - - - - - 21.0° - - 1.83 - - - - - - 24.0° - - 1.83 - - - - - - 27.0° - - 1.50 - - - - - - 30.0° - - 0.78 - - - - - - 33.0° - - 0.39 - - - - - - 36.0° - - - - - - - - -

Specifications on this page are for an ST2H motor*

Predicted Build Rates – Degrees/100ft (30m)

Maximum Adjustable Bend Setting For Rotary Drilling - Degrees

A dash, ‘-’, indicates that no rotation is recommended in that hole curvature. Stabilizers are considered to be 1/8” undergauge.

11 1/4” 7/8 4.8 Stage HEMIDRIL

Page 245: Nov mud motor handbook

237

HEMIDRIL®

Recommended Operating Limits

Fit Availability for All Elastomers

Flow Range 600 - 1200 gpm 2271 - 4542 lpm

Revs per Unit Volume (No Load) 0.11 rev/gal 0.029 rev/L

Speed (No Load) 66 - 132 rpm

Approx Press Drop @ 1200 gpm (No Load) 350 psi 2400 kpa

Performance Output

Theoretical Performance Curve

HEMIDRIL Max Diff Pressure* 1090 psi 7515 kPa

HEMIDRIL Torque @ Max Pressure 26160 lb-ft 35468 N-m

US STD OS 2xOS

Availability Because of the evenwall elastomer in HEMIDRIL power sections, fits other than standard are not necessary.

[water @ 70°F (21°C)]**

11 1/4”7/8 4.8

**For temperatures exceeding 140°F (60°C), decrease the rated Max Differential Pressure limit as per the guide on page 39.

Performance curves are for reference only. Performance data and dimensions subject to change without notice. Performance curves based upon Dyno testing at 70°F (21°C). Actual field performance

may vary with field operating conditions.Operating a power section near or above maximum differential pressure will reduce life.

Page 246: Nov mud motor handbook
Page 247: Nov mud motor handbook

APPENDIX:REFERENCE

INFORMATION

Page 248: Nov mud motor handbook
Page 249: Nov mud motor handbook

241

FormulasHydraulic Power

Power (HP) =Pb x Q1714

Power (kW) =Pb x Q60000

Pb = Bit pressure drop (psi)

Q = Flow rate (US gpm)

Pb = Bit pressure drop (kPa)

Q = Flow rate (lpm)

Mechanical Power

Power (HP) =T x N5250

Power (HP) =T x N

9548.8T = Torque (lb-ft)

N = Rotational Speed (RPM)

T = Torque (N-m)

N = Rotational Speed (RPM)

Pressure Drop Across the Bit Jet Nozzle (Pb)

Pb (psi) =Q2 x W

10858 x A2 Pb (kPa) =Q2 x W

6.4964 x A2

Q = Flow rate (US gpm)

W = Mud weight (lb/gal)

A = Flow Area (in2)

Q = Flow rate (lpm)

W = Mud weight (kg/m3)

A = Flow Area (in2)

Total Flow Area (TFA) for a Specific Bit Pressure Drop

TFA (in2) =Q2 x W

10858 x Pb

TFA (mm2) =Q2 x W

6.4964 x Pb

Q = Flow rate (US gpm)

W = Mud weight (lb/gal)

Pb = Bit pressure drop (psi)

Q = Flow rate (lpm)

W = Mud weight (kg/m3)

Pb = Bit pressure drop (kPa)

11. Engineering Data

Engineering Reference Data

Page 250: Nov mud motor handbook

Motor Handbook, 7th Edition

242

Imperial ConversionsConvert From To Multiply by

Lengthinch (in) millimeter (mm) 25.4inch (in) centimeter (cm) 2.54feet (ft) meter (m) 0.3048

mile (mi) kilometer (km) 1.609Mass

pound (lb) kilogram (kg) 0.4536Pressure

pounds/sq. inch (psi) kilopascal (kPa) 6.8948pounds/sq. inch (psi) megapascal (MPa) 0.006895pounds/sq. inch (psi) atmosphere (atm) 0.0680462pounds/sq. inch (psi) bar (bar) 0.06895

pounds/sq. inch (psi)kilogram force/sq. centimeter

(kgf/cm²)0.0703067

Stresspounds/sq. inch (psi) megapascal (MPa) 0.006895

pounds/sq. inch (psi)kilogram force/sq. centimeter

(kgf/cm²)0.0703067

pounds/sq. inch (psi) bar (bar) 0.06895pounds/sq. inch (psi) newtons/sq. millimeter (N/mm²) 0.006895

Areasq. inch (in²) sq. centimeter (cm²) 6.4516sq. inch (in²) sq. millimeter (mm²) 645.16sq. feet (ft²) sq. meter (m²) 0.0929

Forcepound (lbf) kilogram force (kgf) 0.4536pound (lbf) newton (N) 4.4482pound (lbf) decanewton (daN) 0.4448pound (lbf) kilonewton (kN) 0.004448

Flowgallons (US)/min (gpm US)) liters/minute (lpm) 3.785gallons (US)/min (gpm US)) cubic meters/minute (m³/min) 0.003785barrels (US)/minute (bbl/min

(US))cubic meters/minute (m³/min) 0.1589

Torquepound foot (lb-ft) newton meter (N-m) [Joules, J] 1.35582pound foot (lb-ft) kilonewton meter (kN-m) 0.0013558pound foot (lb-ft) kilogram meter (kgf m) 0.1382

Volumegallon (US) (gal (US)) liter (l) 3.785gallon (US) (gal (US)) cubic meter (m³) 0.003785

cubic feet (ft³) cubic meter (m³) 0.02831barrel (US) (bbl (US)) cubic meter (m³) 0.1589

Powerhorsepower (HP) kilowatt (kW) 0.7457

Nozzles32nds inch (32nds inch) millimeter (mm) 0.793

Temperature °Fahrenheit (°F) °Celsius (°C) (°F-32)/1.8

Densitypounds/gallon (US) (lbs/gal) kilograms/cubic meter (kg/m³) 119.82pounds/gallon (US) (lbs/gal) grams/cubic centimeter (g/cm³) 0.11982

pounds/cubic inch(lbs/in³)

kilograms/cubic meter (kg/m³) 27679.7

pounds/cubic inch (lbs/in³) grams/cubic centimeter (g/cm³) 27.6797Energy

pound foot (lb-ft) joules (J) 1.35582

Page 251: Nov mud motor handbook

243

Metric ConversionsConvert From To Multiply by

Length millimeter (mm) inch (in) 0.03937centimeter (cm) inch (in) 0.39370

meter (m) feet (ft) 3.28084kilometer (km) mile (mi) 0.62150

Mass kilogram (kg) pound (lb) 2.20462

Pressure kilopascal (kPa) pounds/sq. inch (psi) 0.14504

megapascal (MPa) pounds/sq. inch (psi) 145.0326atmosphere (atm) pounds/sq. inch (psi) 14.22340

bar (bar) pounds/sq. inch (psi) 14.69590kilogram force/sq. centimeter

(kgf/cm²)pounds/sq. inch (psi) 14.50326

Stress megapascal (MPa) pounds/sq. inch (psi) 145.0326

kilogram force/sq. centimeter (kgf/cm²)

pounds/sq. inch (psi) 14.22340

bar (bar) pounds/sq. inch (psi) 14.50326newtons/sq. millimeter (N/mm²) pounds/sq. inch (psi) 145.0326

Area sq. centimeter (cm²) sq. inch (in²) 0.15500sq. millimeter (mm²) sq. inch (in²) 0.00155

sq. meter (m²) sq. feet (ft²) 10.76426Force

kilogram force (kgf) pound (lbf) 2.20459newton (N) pound (lbf) 0.22481

decanewton (daN) pound (lbf) 2.24820kilonewton (kN) pound (lbf) 224.8201

Flow liters/minute (lpm) gallons (US)/min (gpm US)) 0.26420

cubic meters/minute (m³/min) gallons (US)/min (gpm US)) 264.2008

cubic meters/minute (m³/min)barrels (US)/minute (bbl/

min (US))6.29327

Torque newton meter (N-m) pound foot (lb-ft) 0.73756

kilonewton meter (kN-m) pound foot (lb-ft) 737.561kilogram meter (kgf m) pound foot (lb-ft) 7.23589

Volume liter (l) gallon (US) (gal (US)) 0.26420

cubic meter (m³) gallon (US) (gal (US)) 264.2008cubic meter (m³) cubic feet (ft³) 35.32321cubic meter (m³) barrel (US) (bbl (US)) 6.29327

Power kilowatt (kW) horsepower (HP) 1.34102

Nozzles millimeter (mm) 32nds inch (32nds inch) 1.26103

Temperature °Celsius (°C) °Fahrenheit (°F) (°Cx1.8)+32

Density kilograms/cubic meter (kg/m³) pounds/gallon (US) (lbs/gal) 0.00835

grams/cubic centimeter (g/cm³) pounds/gallon (US) (lbs/gal) 8.34585

kilograms/cubic meter (kg/m³)pounds/cubic inch

(lbs/in³)0.0000361

grams/cubic centimeter (g/cm³) pounds/cubic inch (lbs/in³) 0.03613Energy

joules (J) pound foot (lb-ft) 0.737557

Engineering Reference Data

Page 252: Nov mud motor handbook

Motor Handbook, 7th Edition

244

Millimeter Equivalents Use tables to find millimeter equivalents of common inch measurements

in 0 1/16 1/8 3/16 1/4 5/16 3/8 7/160 0.0 1.6 3.2 4.8 6.4 7.9 9.5 11.11 25.4 27.0 28.6 30.2 31.8 33.3 34.9 36.52 50.8 52.4 54.0 55.6 57.2 58.7 60.3 61.93 76.2 77.8 79.4 81.0 82.6 84.1 85.7 87.34 101.6 103.2 104.8 106.4 108.0 109.5 111.1 112.75 127.0 128.6 130.2 131.8 133.4 134.9 136.5 138.16 152.4 154.0 155.6 157.2 158.8 160.3 161.9 163.57 177.8 179.4 181.0 182.6 184.2 185.7 187.3 188.98 203.2 204.8 206.4 208.0 209.6 211.1 212.7 214.39 228.6 230.2 231.8 233.4 235.0 236.5 238.1 239.7

10 254.0 255.6 257.2 258.8 260.4 261.9 263.5 265.111 279.4 281.0 282.6 284.2 285.8 287.3 288.9 290.512 304.8 306.4 308.0 309.6 311.2 312.7 314.3 315.913 330.2 331.8 333.4 335.0 336.6 338.1 339.7 341.314 355.6 357.2 358.8 360.4 362.0 363.5 365.1 366.715 381.0 382.6 384.2 385.8 387.4 388.9 390.5 392.116 406.4 408.0 409.6 411.2 412.8 414.3 415.9 417.517 431.8 433.4 435.0 436.6 438.2 439.7 441.3 442.918 457.2 458.8 460.4 462.0 463.6 465.1 466.7 468.319 482.6 484.2 485.8 487.4 489.0 490.5 492.1 493.720 508.0 509.6 511.2 512.8 514.4 515.9 517.5 519.121 533.4 535.0 536.6 538.2 539.8 541.3 542.9 544.522 558.8 560.4 562.0 563.6 565.2 566.7 568.3 569.923 584.2 585.8 587.4 589.0 590.6 592.1 593.7 595.324 609.6 611.2 612.8 614.4 616.0 617.5 619.1 620.7

in 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/160 12.7 14.3 15.9 17.5 19.1 20.6 22.2 23.81 38.1 39.7 41.3 42.9 44.5 46.0 47.6 49.22 63.5 65.1 66.7 68.3 69.9 71.4 73.0 74.63 88.9 90.5 92.1 93.7 95.3 96.8 98.4 100.04 114.3 115.9 117.5 119.1 120.7 122.2 123.8 125.45 139.7 141.3 142.9 144.5 146.1 147.6 149.2 150.86 165.1 166.7 168.3 169.9 171.5 173.0 174.6 176.27 190.5 192.1 193.7 195.3 196.9 198.4 200.0 201.68 215.9 217.5 219.1 220.7 222.3 223.8 225.4 227.09 241.3 242.9 244.5 246.1 247.7 249.2 250.8 252.4

10 266.7 268.3 269.9 271.5 273.1 274.6 276.2 277.811 292.1 293.7 295.3 296.9 298.5 300.0 301.6 303.212 317.5 319.1 320.7 322.3 323.9 325.4 327.0 328.613 342.9 344.5 346.1 347.7 349.3 350.8 352.4 354.014 368.3 369.9 371.5 373.1 374.7 376.2 377.8 379.415 393.7 395.3 396.9 398.5 400.1 401.6 403.2 404.816 419.1 420.7 422.3 423.9 425.5 427.0 428.6 430.217 444.5 446.1 447.7 449.3 450.9 452.4 454.0 455.618 469.9 471.5 473.1 474.7 476.3 477.8 479.4 481.019 495.3 496.9 498.5 500.1 501.7 503.2 504.8 506.420 520.7 522.3 523.9 525.5 527.1 528.6 530.2 531.821 546.1 547.7 549.3 550.9 552.5 554.0 555.6 557.222 571.5 573.1 574.7 576.3 577.9 579.4 581.0 582.623 596.9 598.5 600.1 601.7 603.3 604.8 606.4 608.024 622.3 623.9 625.5 627.1 628.7 630.2 631.8 633.4

Page 253: Nov mud motor handbook

245

Millimeter and Decimal EquivalentsUse table to find common equivalent fractional inch, millimeter, and decimal inch measurements

Fraction mm Decimal Fraction mm Decimal

1/64 0.4 0.0156 33/64 13.1 0.5156

1/32 0.8 0.0313 17/32 13.5 0.5313

3/64 1.2 0.0469 35/64 13.9 0.5469

1/16 1.6 0.0625 9/16 14.3 0.5625

5/64 2.0 0.0781 37/64 14.7 0.5781

3/32 2.4 0.0938 19/32 15.1 0.5938

7/64 2.8 0.1094 39/64 15.5 0.6094

1/8 3.2 0.1250 5/8 15.9 0.6250

9/64 3.6 0.1406 41/64 16.3 0.6406

5/32 4.0 0.1563 21/32 16.7 0.6563

11/64 4.4 0.1719 43/64 17.1 0.6719

3/16 4.8 0.1875 11/16 17.5 0.6875

13/64 5.2 0.2031 45/64 17.9 0.7031

7/32 5.6 0.2188 23/32 18.3 0.7188

15/64 6.0 0.2344 47/64 18.7 0.7344

1/4 6.4 0.2500 3/4 19.1 0.7500

17/64 6.7 0.2656 49/64 19.4 0.7656

9/32 7.1 0.2813 25/32 19.8 0.7813

19/64 7.5 0.2969 51/64 20.2 0.7969

5/16 7.9 0.3125 13/16 20.6 0.8125

21/64 8.3 0.3281 53/64 21.0 0.8281

11/32 8.7 0.3438 27/32 21.4 0.8438

23/64 9.1 0.3594 55/64 21.8 0.8594

3/8 9.5 0.3750 7/8 22.2 0.8750

25/64 9.9 0.3906 57/64 22.6 0.8906

13/32 10.3 0.4063 29/32 23.0 0.9063

27/64 10.7 0.4219 59/64 23.4 0.9219

7/16 11.1 0.4375 15/16 23.8 0.9375

29/64 11.5 0.4531 61/64 24.2 0.9531

15/32 11.9 0.4688 31/32 24.6 0.9688

31/64 12.3 0.4844 63/64 25.0 0.9844

1/2 12.7 0.5000 1 25.4 1.0000

Engineering Reference Data

Page 254: Nov mud motor handbook

Motor Handbook, 7th Edition

246

Rotary PinConnection

Size of Bit(in)

2 3/8 REG 3 3/4 4 1/8 4 3/8

3 7/8 4 1/4 4 1/2

2 7/8 REG 4 5/8 4 7/8

4 3/4 5

3 1/2 REG

5 1/8 6 6 5/8

5 3/8 6 1/8 6 3/4

5 5/8 6 1/4 7

5 3/4 6 3/8 7 3/8

5 7/8 6 1/2

4 1/2 REG

7 1/2 8 1/8 8 3/4

7 5/8 8 3/8 9

7 3/4 8 1/2 9 3/8

7 7/8 8 5/8

6 5/8 REG

9 1/2 11 5/8 15

9 5/8 11 3/4 16

9 3/4 12 17

9 7/8 12 1/4 17 1/2

10 5/8 13 1/2 18 1/2

11 13 3/4

11 1/2 14 3/4

7 5/8 REG

14 1/2 17 22

14 3/4 17 1/2 23

15 18 1/2 24

16 20 26

8 5/8 REG

18 5/8 23 27

20 24 and larger

22 26

12. Drill Bit Sizes

Page 255: Nov mud motor handbook

247

NominalSize (in)

Tube

ID (in) Wall Thickness (in)

3 1/2 2 1/16 0.719

3 1/2 2 1/4 0.625

4 2 9/16 0.719

4 1/2 2 3/4 0.875

5 3 1.000

5 1/2 3 3/8 1.063

6 5/8 4 1/2 1.063

NominalSize (in)

Tool Joint

Connection Size OD (in) ID (in)

3 1/2 NC38 (3 1/2 IF) 4 3/4 2 3/16

3 1/2 NC38 (3 1/2 IF) 4 3/4 2 3/8

4 NC40 (4 FH) 5 1/4 2 11/16

4 1/2 NC46 (4 IF) 6 1/4 2 7/8

5 NC50 (4 1/2 IF) 6 5/8 3 1/16

5 1/2 5 1/2 FH 7 3 1/2

6 5/8 6 5/8 FH 8 4 1/2

NominalSize (in)

Approximate Weight (including tube & joints)

Wt/ft (lb) Wt/Jt 30 ft (lb)

3 1/2 25.3 760

3 1/2 23.2 695

4 27.2 815

4 1/2 41.0 1,230

5 49.3 1,480

5 1/2 57.0 1,880

6 5/8 70.8 2,290

Engineering Reference Data

13. Heavy Walled Drillpipe

Page 256: Nov mud motor handbook

Motor Handbook, 7th Edition

248

Mud Weight BuoyancyFactor(lbs/gal) (kgf/l)

8.5 1.02 0.870

9.0 1.08 0.862

9.5 1.14 0.855

10.0 1.20 0.847

10.5 1.26 0.839

11.0 1.32 0.832

11.5 1.38 0.824

12.0 1.44 0.816

12.5 1.50 0.809

13.0 1.56 0.801

13.5 1.62 0.793

14.0 1.68 0.786

14.5 1.74 0.778

15.0 1.80 0.771

15.5 1.86 0.763

16.0 1.92 0.755

16.5 1.98 0.748

17.0 2.04 0.740

17.5 2.10 0.732

18.0 2.16 0.725

Calculation:

BF = Buoyancy Factor

MW = Mud Weight (lbs/gal)

BF = Buoyancy Factor

MW = Mud Weight (kgf/l)

Note:

14. Buoyancy Factor for Drill Collars

BF = 1 -MW (lbs/gal)

65.37

BF = 1 -MW (kgf/l)

7.83

MW (lb / gal) x .11983 = MW (kgf /l)

Page 257: Nov mud motor handbook

249

DrillCollar

OD(inches)

Drill Collar ID(inches)

1

1 1/

4

1 1/

2

1 3/

4

2

2 1/

4

2 1/

2

2 13

/16

3

3 1/

4

3 1/

2

3 3/

4

4

2 7/8 19 18 16

3 21 20 18

3 1/8 22 22 20

3 1/4 26 24 22

3 1/2 30 29 27

3 3/4 35 33 32

4 40 39 37 35 32 29

4 1/8 43 41 39 37 35 32

4 1/4 46 44 42 40 38 35

4 1/2 51 50 48 46 43 41

4 3/4 54 52 50 47 44

5 61 59 56 53 50

5 1/4 68 65 63 60 57

5 1/2 75 73 70 67 64 60

5 3/4 82 80 78 75 72 67 64 60

6 90 88 85 83 79 75 72 68

6 1/4 98 96 94 91 88 83 80 76 72

6 1/2 107 105 102 99 96 91 89 85 80

6 3/4 116 114 111 108 105 100 98 93 89

7 125 123 120 117 114 110 107 103 98 93 84

7 1/4 134 132 130 127 124 119 116 112 108 103 93

7 1/2 144 142 139 137 133 129 126 122 117 113 102

7 3/4 154 152 150 147 144 139 136 132 128 123 112

8 165 163 160 157 154 150 147 143 138 133 122

8 1/4 176 174 171 168 165 160 158 154 149 144 133

8 1/2 187 185 182 179 176 172 169 165 160 155 150

9 210 208 206 203 200 195 192 188 184 179 174

9 1/2 234 232 230 227 224 220 216 212 209 206 198

9 3/4 248 245 243 240 237 232 229 225 221 216 211

10 261 259 257 254 251 246 243 239 235 230 225

11 317 315 313 310 307 302 299 295 291 286 281

12 379 377 374 371 368 364 361 357 352 347 342

Engineering Reference Data

15. Drill Collar Weight

Page 258: Nov mud motor handbook

Motor Handbook, 7th Edition

250

Connection

Size Type OD

(in) 1 1 1/4 1 1/2

API NC 23 3 *2,508 *2,508 *2,508

3 1/8 *3,330 *3,330 2,647

3 1/4 4,000 3,387 2,647

2 3/8 Regular 3 *2,241 *2,241

3 1/8 *3,028 2,574

3 1/4 3,285 2,574

2 7/8 PAC3 3 *3,797 *3,797

3 1/8 *4,966 4,151

3 1/4 5,206 4,151

2 3/8 API IF 3 1/2 *4,606 *4,606

API NC 26 3 3/4 5,501 4,668

2 7/8 Slim Hole

2 7/8 Regular 3 1/2 *3,838 *3,838

3 3/4 5,766 4,951

3 7/8 5,766 4,951

2 7/8 Extra Hole 3 3/4 *4,089 *4,089

3 1/2 Dbl. Streamline 3 7/8 *5,352 *5,352

2 7/8 Mod. Open 4 1/8 *8,059 *8,059

2 7/8 API IF 3 7/8 *4,640 *4,640

API NC 31 4 1/8 *7,390 *7,390

3 1/2 Regular 4 1/8 *6,466 *6,466

4 1/4 *7,886 *7,886

4 1/2 10,471 9,514

3 1/2 Slim Hole 4 1/4 *8,858 *8,858

4 1/2 10,286 9,307

API NC 35 4 1/2

4 3/4

5

3 1/2 Extra Hole 4 1/4

4 Slim Hole 4 1/2

3 1/2 Mod. Open 4 3/4

5

5 1/4

3 1/2 API IF 4 3/4

API NC 38 5

4 1/2 Slim Hole 5 1/4

5 1/2

3 1/2 H-904 4 3/4

5

5 1/4

5 1/2

16. Drill Collar Make-up TorqueRecommended Make-Up Torque1 for Rotary Shouldered Drill Collar Connections

Page 259: Nov mud motor handbook

251

Minimum Make-up Torque2 (lb-ft)Bore of Drill Collar (inches)

1 3/4 2 2 1/4 2 1/2 2 13/16 3

1,749

1,749

1,749

2,926

2,926

2,926

3,697

3,697

*3,838

4,002

4,002

*4,089

*5,352

7,433

*4,640 *4,640

*7,390 6,853

*6,466 *6,466 5,685

*7,886 7,115 5,685

8,394 7,115 5,685

8,161 6,853 5,391

8,161 6,853 5,391

*9,038 *9,038 *9,038 7,411

12,273 10,826 9,202 7,411

12,273 10,826 9,202 7,411

*5,161 *5,161 *5,161 *5,161

*8,479 *8,479 *8,479 8,311

*12,074 11,803 10,144 8,311

13,283 11,803 10,144 8,311

13,283 11,803 10,144 8,311

*9,986 *9,986 *9,986 *9,986 8,315

*13.949 *13.949 12,907 10,997 8,315

16,207 14,643 12,907 10,997 8,315

16,207 14,643 12,907 10,997 8,315

*8,786 *8,786 *8,786 *8,786 *8,786

*12,794 *12,794 *12,794 *12,794 10,408

*17,094 16,929 15,137 13,151 10,408

18,522 16,929 15,137 13,151 10,408

Engineering Reference Data

Page 260: Nov mud motor handbook

Motor Handbook, 7th Edition

252

Connection

Size Type OD

(in) 1 3/4 2 2 1/4

4 Full Hole 5 *10,910 *10,910 *10,910

API NC 40 5 1/4 *15,290 *15,290 *15,290

4 Mod. Open 5 1/2 *19,985 18,886 17,028

4 1/2 Dbl. Streamline 5 3/4 20,539 18,886 17,028

6 20,539 18,886 17,028

4 H-904 5 1/4 *12,590 *12,590 *12,590

5 1/2 *17,401 *17,401 *17,401

5 3/4 *22,531 *22,531 21,714

6 25,408 23,671 21,714

6 1/4 25,408 23,671 21,714

4 1/2 API Regular 5 1/2 *15,576 *15,576 *15,576

5 3/4 *20,609 *20,609 *20,609

6 25,407 23,686 21,749

6 1/4 25,407 23,686 21,749

API NC 44 5 3/4 *20,895 *20,895 *20,895

6 *26,453 25,510 23,493

6 1/4 27,300 25,510 23,493

6 1/2 27,300 25,510 23,493

4 1/2 API Full Hole 5 1/2 *12,973 *12,973

5 3/4 *18,119 *18,119

6 *23,605 *23,605

6 1/4 27,294 25,272

6 1/2 27,294 25,272

4 1/2 Extra Hole 5 3/4 *17,738

API NC 46 6 *23,422

4 API IF 6 1/4 28,021

4 1/2 Semi IF 6 1/2 28,021

5 Dbl. Streamline 6 3/4 28,021

4 1/2 Mod. Open

4 1/2 H-904 5 3/4 *18,019

6 *23,681

6 1/4 28,732

6 1/2 28,732

6 3/4 28,732

5 H-904 6 1/4 *25,360

6 1/2 *31,895

6 3/4 35,292

7 35,292

4 1/2 API IF 6 1/4 *23,004

API NC 50 6 1/2 *29,679

5 Extra Hole 6 3/4 *36,742

5 Mod. Open 7 38,397

5 1/2 Dbl. Streamline 7 1/4 38,397

5 Semi IF 7 1/2 38,397

5 1/2 H-904 6 3/4 *34,508

7 *41,993

7 1/4 42,719

7 1/2 42,719

Page 261: Nov mud motor handbook

253

Minimum Make-up Torque2 (lb-ft)Bore of Drill Collar (inches)

2 1/2 2 13/16 3 3 1/4 3 1/2 3 3/4

*10,910 *10,910

14,969 12,125

14,969 12,125

14,969 12,125

14,969 12,125

*12,590 *12,590

*17,401 16,536

19,543 16,536

19,543 16,536

19,543 16,536

*15,576 *15,576

19,601 16,629

19,601 16,629

19,601 16,629

*20,895 18,161

21,257 18,161

21,257 18,161

21,257 18,161

*12,973 *12,973 *12,973

*18,119 *18,119 17,900

22,028 19,921 17,900

23,028 19,921 17,900

23,028 19,921 17,900

*17,738 *17,738 *17,738

*23,422 22,426 20,311

25,676 22,426 20,311

25,676 22,426 20,311

25,676 22,426 20,311

*18,019 *18,019 *18,019

*23,681 23,159 21,051

26,397 23,159 21,051

26,397 23,159 21,051

26,397 23,159 21,051

*25,360 *25,360 *25,360 23,988

*31,895 29,400 27,167 23,988

32,825 29,400 27,167 23,988

32,825 29,400 27,167 23,988

*23,004 *23,004 *23,004 *23,004

*29,679 *29,679 *29,679 26,675

35,824 32,277 29,966 26,675

35,824 32,277 29,966 26,675

35,824 32,277 29,966 26,675

35,824 32,277 29,966 26,675

*34,508 *34,508 34,142 30,781

40,117 36,501 34,142 30,781

40,117 36,501 34,142 30,781

40,117 36,501 34,142 30,781

Engineering Reference Data

Page 262: Nov mud motor handbook

Motor Handbook, 7th Edition

254

Connection

Size Type OD

(in) 1 3/4 2 2 1/4

5 1/2 API Regular 6 3/4 *31,941

7 *39,419

7 1/4 42,481

7 1/2 42,481

5 1/2 API Full Hole 7 *32,762

7 1/4 *40,998

7 1/2 *49,661

7 3/4 54,515

API NC 56 7 1/4

7 1/2

7 3/4

8

6 5/8 API Regular 7 1/2

7 3/4

8

8 1/4

6 5/8 H-904 7 1/2

7 3/4

8

8 1/4

API NC 61 8

8 1/4

8 1/2

8 3/4

9

5 1/2 API IF 8

8 1/4

8 1/2

8 3/4

9

9 1/4

6 5/8 API Full Hole 8 1/2

8 3/4

9

9 1/4

9 1/2

API NC 70 9

9 1/4

9 1/2

9 3/4

10

10 1/4

API NC 77 10

10 1/4

10 1/2

10 3/4

11

7 H-904 8

8 1/4

8 1/2

Page 263: Nov mud motor handbook

255

Minimum Make-up Torque2 (lb-ft)Bore of Drill Collar (inches)

2 1/2 2 13/16 3 3 1/4 3 1/2 3 3/4

*31,941 *31,941 *31,941 30,495

*39,419 36,235 33,868 30,495

39,866 36,235 33,868 30,495

39,866 36,235 33,868 30,495

*32,762 *32,762 *32,762 *32,762

*40,998 *40,998 *40,998 *40,998

*49,661 47,756 45,190 41,533

51,687 47,756 45,190 41,533

*40,498 *40,498 *40,498 *40,498

*49,060 48,221 45,680 42,058

52,115 48,221 45,680 42,058

52,115 48,221 45,680 42,058

*46,399 *46,399 *46,399 *46,399

*55,627 53,346 50,704 46,936

57,393 53,346 50,704 46,936

57,393 53,346 50,704 46,936

*46,509 *46,509 *46,509 *46,509

*55,708 *55,708 53,629 49,855

60,321 56,273 53,629 49,855

60,321 56,273 53,629 49,855

*55,131 *55,131 *55,131 *55,131

*65,438 *65,438 *65,438 61,624

72,670 68,398 65,607 61,624

72,670 68,398 65,607 61,624

72,670 68,398 65,607 61,624

*56,641 *56,641 *56,641 *56,641 *56,641

*67,133 *67,133 *67,133 63,381 59,027

74,626 70,277 67,436 63,381 59,027

74,626 70,277 67,436 63,381 59,027

74,626 70,277 67,436 63,381 59,027

74,626 70,277 67,436 63,381 59,027

*67,789 *67,789 *67,789 *67,789 *67,789 67,184

*79,544 *79,544 *79,544 76,706 72,102 67,184

88,582 83,992 80,991 76,706 72,102 67,184

88,582 83,992 80,991 76,706 72,102 67,184

88,582 83,992 80,991 76,706 72,102 67,184

*75,781 *75,781 *75,781 *75,781 *75,781 *75,781

*88,802 *88,802 *88,802 *88,802 *88,802 *88,802

*102,354 *102,354 *102,354 101,107 96,214 90,984

113,710 108,841 105,657 101,107 96,214 90,984

113,710 108,841 105,657 101,107 96,214 90,984

113,710 108,841 105,657 101,107 96,214 90,984

*108,194 *108,194 *108,194 *108,194 *108,194 *108,194

*124,051 *124,051 *124,051 *124,051 *124,051 *124,051

*140,491 *140,491 *140,491 140,488 135,119 129,375

154,297 148,965 145,476 140,488 135,119 129,375

154,297 148,965 145,476 140,488 135,119 129,375

*53,454 *53,454 *53,454 *53,454 *53,454 *53,454

*63,738 *63,738 *63,738 *63,738 60,971 56,382

*74,478 72,066 69,265 65,267 60,971 56,382

Engineering Reference Data

Page 264: Nov mud motor handbook

Motor Handbook, 7th Edition

256

Connection

Size Type OD

(in) 1 3/4 2 2 1/4

7 5/8 API Regular 8 1/2

8 3/4

9

9 1/4

9 1/2

7 5/8 H-904 9

9 1/4

9 1/2

8 5/8 API Regular 10

10 1/4

10 1/2

8 5/8 H-904 10 1/4

10 1/2

7 H-904 8 3/4

(with low torque face) 9

7 5/8 API Regular 9 1/4

(with low torque face) 9 1/2

9 3/4

10

7 5/8 H-904 9 3/4

(with low torque face) 10

10 1/4

10 1/2

8 5/8 API Regular 10 3/4

(with low torque face) 11

11 1/4

8 5/8 H-904 10 3/4

(with low torque face) 11

11 1/4

Notes: •Torque figures preceded by an asterisk (*) indicate that the weaker member for the corresponding outside diameter (OD) and bore is the BOX; for all other torque values the weaker member is the PIN.

•In each connection size and type group, torque values apply to all connection types in the group, when used with the same drill collar outside diameter and bore, i.e. 2 3/8” API IF, API NC26, and 2 7/8” Slim Hole connections used with 3 1/2” x 1 1/4” drill collars all have the same minimum make-up torque of 4,600 ft-lb, and the BOX is the weaker member.

•Stress-relief features are disregarded for make-up torque.

Page 265: Nov mud motor handbook

257

Minimum Make-up Torque2 (lb-ft)Bore of Drill Collar (inches)

2 1/2 2 13/16 3 3 1/4 3 1/2 3 3/4

*60,402 *60,402 *60,402 *60,402 *60,402 *60,402

*72,169 *72,169 *72,169 *72,169 *72,169 *72,169

*84,442 *84,442 *84,442 84,221 79,536 74,529

96,301 91,633 88,580 84,221 79,536 74,529

96,301 91,633 88,580 84,221 79,536 74,529

*73,017 *73,017 *73,017 *73,017 *73,017 *73,017

*86,006 *86,006 *86,006 *86,006 *86,006 *86,006

*99,508 *99,508 *99,508 *99,508 *99,508 96,285

*109,345 *109,345 *109,345 *109,345 *109,345 *109,345

*125,263 *125,263 *125,263 *125,263 *125,263 125,034

*141,767 *141,767 141,134 136,146 130,777 125,034

*113,482 *113,482 *113,482 *113,482 *113,482 *113,482

*130,063 *130,063 *130,063 *130,063 *130,063 *130,063

*68,061 *68,061 67,257 62,845 58,131

74,235 71,361 67,257 62,845 58,131

*73,099 *73,099 *73,099 *73,099

*86,463 *86,463 82,457 77,289

91,789 87,292 82,457 77,289

91,789 87,292 82,457 77,289

*91,667 *91,667 *91,667 *91,667 *91,667

*106,260 *106,260 *106,260 104,171 98,804

117,112 113,851 109,188 104,171 98,804

117,112 113,851 109,188 104,171 98,804

*112,883 *112,883 *112,883 *112,883

*130,672 *130,672 *130,672 *130,672

147,616 142,430 136,846 130,871

*92,960 *92,960 *92,960 *92,960

*110,781 *110,781 *110,781 *110,781

*129,203 *129,203 *129,203 *129,203

Footnotes: 1. Basis of calculations for recommended make-up torque assumed the use of a thread compound containing 40-60% by weight of finely powered metallic zinc or 60% by weight of finely powered metallic lead, with not more than 0.3% total active sulfur applied thoroughly to all threads and shoulders and using the modified screw jack formula in API RP7G (16th edition) Appendix A, paragraph A.9, and a unit stress of 62,500 psi in the box or pin, whichever is weaker.

2. Normal torque range is tabulated value plus 10%. Higher torque values may be used under extreme conditions.

3. Make-up torque for 2 7/8 PAC connection is based on 87,500 psi stress and other factors listed in footnote 1.

4. Make-up torque for H-90 connection is based on 56,200 psi stress and other factors listed in footnote 1.

This table taken from API Recommended Practice 7G, Sixteenth Edition, December 1, 1998.

Engineering Reference Data

Page 266: Nov mud motor handbook

Motor Handbook, 7th Edition

258

Drill Pipe New Tool Joint Data

NomSize

NomWeight

Type Upsetand Grade

ConnectionNewOD

NewID

Make-upTorque6

in lb/ft in in lb-ft2 3/8 4.85 EU-E75 NC26 3 3/8 1 3/4 4,125 B

4.85 EU-E75 W.O. 3 3/8 2 2,541 P4.85 EU-E75 2 3/8 OHLW 3 1/8 2 2,716 P4.85 EU-E75 2 3/8 SL-H90 3 1/4 2 3,042 P

2 3/8 6.65 IU-E75 2 3/8 PAC2 2 7/8 1 3/8 2,803 P6.65 EU-E75 NC26 3 3/8 1 3/4 4,125 B6.65 EU-E75 2 3/8 SL-H90 3 1/4 2 3,042 P6.65 EU-E75 2 3/8 OHSW 3 1/4 1 3/4 3,783 B

2 3/8 6.65 EU-X95 NC26 3 3/8 1 3/4 4,125 B2 3/8 6.65 EU-G105 NC262 3 3/8 1 3/4 4,125 B2 7/8 6.85 EU-E75 NC31 4 1/8 2 1/8 7,074 P

6.85 EU-E75 2 7/8 WO 4 1/8 2 7/16 4,209 P6.85 EU-E75 2 7/8 OHLW2 3 3/4 2 7/16 3,290 P6.85 EU-E75 2 7/8 SL-H90 3 7/8 2 7/16 4,504 P

2 7/8 10.40 EU-E75 NC31 4 1/8 2 1/8 7,074 P10.40 IU-E75 2 7/8 XH 4 1/4 1 7/8 7,853 P10.40 IU-E75 NC262 3 3/8 1 3/4 4,125 B10.40 EU-E75 2 7/8 OHSW2 3 7/8 2 5/32 5,194 P10.40 EU-E75 2 7/8 SL-H90 3 7/8 2 5/32 6,732 P10.40 IU-E75 2 7/8 PAC2 3 1/8 1 1/2 3,424 P

2 7/8 10.40 EU-X95 NC31 4 1/8 2 7,895 P10.40 EU-X95 2 7/8 SL-H902 3 7/8 2 5/32 6,732 P

2 7/8 10.40 EU-G105 NC31 4 1/8 2 7,895 P2 7/8 10.40 EU-S135 NC31 4 3/8 1 5/8 10,086 P3 1/2 9.50 EU-E75 NC38 4 3/4 3 7,595 P

9.50 EU-E75 NC38 4 3/4 2 11/16 10,843 P9.50 EU-E75 3 1/2 OHLW 4 3/4 3 7,082 P9.50 EU-E75 3 1/2 SL-H90 4 5/8 3 7,469 P

3 1/2 13.30 EU-E75 NC38 4 3/4 2 11/16 10,843 P13.30 IU-E75 NC312 4 1/8 2 1/8 7,074 P13.30 EU-E75 3 1/2 OHSW 4 3/4 2 11/16 10,300 P13.30 EU-E75 3 1/2 H90 5 1/4 2 3/4 14,043 P13.30 EU-X95 NC38 5 2 9/16 12,057 P13.30 EU-X95 3 1/2 SL-H902 4 5/8 2 11/16 11,073 P13.30 EU-X95 3 1/2 H90 5 1/4 2 3/4 14,043 P

3 1/2 13.30 EU-G105 NC38 5 2 7/16 13,221 P3 1/2 13.30 EU-S135 NC40 5 3/8 2 7/16 17,858 P

13.30 EU-S135 NC38 5 2 1/8 15,902 P3 1/2 15.50 EU-E75 NC38 5 2 9/16 12,057 P3 1/2 15.50 EU-X95 NC38 5 2 7/16 13,221 P3 1/2 15.50 EU-G105 NC38 5 2 1/8 15,902 P

15.50 EU-G105 NC40 5 1/4 2 9/16 16,616 P3 1/2 15.50 EU-S135 NC40 5 1/2 2 1/4 19,616 P

17. Drillpipe & Tool Joint PropertiesRecommended minimum OD and make-up torque of weld-on type tool joints based on torsional strength of box and drill pipe.

Page 267: Nov mud motor handbook

259

Premium Class Class 2

Min ODTool Joint

Min BoxShoulder

w/ EccentricWear

Make-upTorque for Min OD

Tool Joint

Min ODTool Joint

Min BoxShoulder

w/ EccentricWear

Make-upTorque for

Min OD Tool Joint

in in lb-ft in in lb-ft3 1/8 3/64 1,945 3 3/32 1/32 1,689

3 1/16 1/16 1,994 3 1/32 3/64 1,7463 1/16 1,723 2 31/32 3/64 1,481

2 31/32 1/16 1,996 2 15/16 3/64 1,7262 25/32 9/64 2,455 2 23/32 7/64 2,0553 3/16 5/64 2,467 3 5/32 1/16 2,2043 1/32 3/32 2,549 2 31/32 1/16 1,9963 1/16 3/32 2,216 3 1/32 5/64 1,9673 1/4 7/64 3,005 3 7/32 3/32 2,7343 9/32 1/8 3,279 3 1/4 7/64 3,0053 11/16 5/64 3,154 3 21/32 1/16 2,8043 5/8 5/64 3,216 3 19/32 1/16 2,8763 1/2 7/64 3,290 3 7/16 5/64 2,8043 1/2 3/32 3,397 3 7/16 1/16 2,666

3 13/16 9/64 4,597 3 3/4 7/64 3,8673 23/32 9/64 4,357 3 21/32 7/64 3,6643 3/8 11/64 4,125 3 11/32 5/32 3,839

3 19/32 5/32 4,411 3 9/16 7/64 4,0793 19/32 9/64 4,529 3 17/32 7/64 3,7703 1/8 15/64 3,424 3 1/8 15/64 3,424

3 29/32 3/16 5,726 3 27/32 5/32 4,9693 11/16 3/16 5,702 3 5/8 5/32 4,9153 15/16 13/64 6,110 3 7/8 11/64 5,3454 1/16 17/64 7,694 4 15/64 6,8934 13/32 1/8 5,773 4 11/32 3/32 4,7974 13/32 1/8 5,773 4 11/32 3/32 4,7974 9/32 1/8 5,340 4 1/4 7/64 4,8684 3/16 7/64 5,521 4 5/32 3/32 5,0034 1/2 11/64 7,274 4 7/16 9/64 6,268

4 15/64 6,893 3 15/16 13/64 6,1104 13/32 3/16 7,278 4 11/32 5/32 6,2994 17/32 1/8 7,064 4 1/2 7/64 6,4874 19/32 7/32 8,822 4 17/32 3/16 7,7854 3/8 13/64 8,742 4 5/16 11/64 7,6474 5/8 11/64 8,826 4 9/16 9/64 7,646

4 21/32 1/4 9,879 4 19/32 7/32 8,8225 9/32 12,569 4 29/32 15/64 10,768

4 13/16 21/64 12,614 4 23/32 9/32 10,9574 17/32 3/16 7,785 4 15/32 5/32 6,7694 21/32 1/4 9,879 4 19/32 7/32 8,8224 23/32 9/32 10,957 4 5/8 15/64 9,3484 15/16 1/4 11,363 4 27/32 13/64 9,5955 3/32 21/64 14,419 4 31/32 17/64 11,963

Engineering Reference Data

Page 268: Nov mud motor handbook

Motor Handbook, 7th Edition

260

Drill Pipe New Tool Joint Data

NomSize

NomWeight

Type Upset

and GradeConnection

NewOD

NewID

Make-upTorque6

in lb/ft in in lb-ft4 11.85 EU-E75 NC46 6 3 1/4 19,937 P

11.85 EU-E75 4 WO 5 3/4 3 7/16 17,186 P11.85 EU-E75 4 OHLW 5 1/4 3 15/32 13,186 P11.85 IU-E75 4 H90 5 1/2 2 13/16 21,185 P

4 14.00 IU-E75 NC40 5 1/4 2 13/16 13,968 P14.00 EU-E75 NC46 6 3 1/4 19,937 P14.00 IU-E75 4 SH2 4 5/8 2 9/16 9,016 P14.00 EU-E75 4 OHSW 5 1/2 3 1/4 16,236 P14.00 IU-E75 4 H90 5 1/2 2 13/16 21,185 P

4 14.00 IU-X95 NC40 5 1/4 2 11/16 15,319 P14.00 EU-X95 NC46 6 3 1/4 19,937 P14.00 IU-X95 4 H90 5 1/2 2 13/16 21,185 P

4 14.00 IU-G105 NC40 5 1/2 2 7/16 17,858 P14.00 EU-G105 NC46 6 3 1/4 19,937 P14.00 IU-G105 4 H90 5 1/2 2 13/16 21,185 P

4 14.00 EU-S135 NC46 6 3 23,399 P4 15.70 IU-E75 NC40 5 1/4 2 11/16 15,319 P

15.70 EU-E75 NC46 6 3 1/4 19,937 P15.70 IU-E75 4 H90 5 1/2 2 13/16 21,185 P

4 15.70 IU-X95 NC40 5 1/2 2 7/16 17,858 P15.70 EU-X95 NC46 6 3 23,399 P15.70 IU-X95 4 H90 5 1/2 2 13/16 21,185 P

4 15.70 EU-G105 NC46 6 3 23,399 P15.70 IU-G105 4 H90 5 1/2 2 13/16 21,185 P

4 15.70 IU-S135 NC46 6 2 5/8 26,982 B15.70 EU-S135 NC46 6 2 7/8 25,038 P

4 1/2 16.60 IEU-E75 4 1/2 FH 6 3 20,620 P16.60 IEU-E75 NC46 6 1/4 3 1/4 19,937 P16.60 IEU-E75 4 1/2 OHSW 5 7/8 3 3/4 16,162 P16.60 EU-E75 NC50 6 5/8 3 3/4 22,361 P16.60 IEU-E75 4 1/2 H90 6 3 1/4 23,126 P

4 1/2 16.60 IEU-X95 4 1/2 FH 6 2 3/4 23,695 P16.60 IEU-X95 NC46 6 1/4 3 19,937 P16.60 EU-X95 NC50 6 5/8 3 3/4 22,361 P16.60 IEU-X95 4 1/2 H90 6 3 26,969 P

4 1/2 16.60 IEU-G105 4 1/2 FH 6 2 3/4 23,695 P16.60 IEU-G105 NC46 6 1/4 3 23,399 P16.60 EU-G105 NC50 6 5/8 3 3/4 22,361 P16.60 IEU-G105 4 1/2 H90 6 3 26,969 P

4 1/2 16.60 IEU-S135 NC46 6 1/4 2 3/4 26,615 P16.60 EU-S135 NC50 6 5/8 3 1/2 26,674 P

4 1/2 20.00 IEU-E75 4 1/2 FH 6 3 20,620 P20.00 IEU-E75 NC46 6 1/4 3 23,399 P20.00 EU-E75 NC50 6 5/8 3 5/8 24,549 P20.00 IEU-E75 4 1/2 H90 6 3 26,969 P

4 1/2 20.00 IEU-X95 4 1/2 FH 6 2 1/2 26,528 P20.00 IEU-X95 NC46 6 1/4 2 3/4 26,615 P20.00 EU-X95 NC50 6 5/8 3 1/2 26,674 P20.00 IEU-X95 4 1/2 H90 6 3 26,969 P

4 1/2 20.00 IEU-G105 NC46 6 1/4 2 1/2 29,578 P20.00 EU-G105 NC50 6 5/8 3 1/2 26,674 P

4 1/2 20.00 EU-S135 NC50 6 5/8 3 34,520 P

Page 269: Nov mud motor handbook

261

Premium Class Class 2

Min ODTool Joint

Min BoxShoulder

w/ EccentricWear

Make-upTorque for Min OD

Tool Joint

Min ODTool Joint

Min BoxShoulder

w/ EccentricWear

Make-upTorque for Min OD Tool Joint

in in lb-ft in in lb-ft5 7/32 7/64 7,843 5 5/32 5/64 6,4765 7/32 7/64 7,843 5 5/32 5/64 6,476

5 9/64 7,866 4 15/16 7/64 6,5934 7/8 7/64 7,630 4 27/32 3/32 6,962

4 13/16 3/16 9,017 4 3/4 5/32 7,8775 9/32 9/64 9,233 5 7/32 7/64 7,8434 7/16 15/64 8,782 4 3/8 13/64 7,8175 1/16 11/64 9,131 5 9/64 7,839

4 15/16 9/64 8,986 4 7/8 7/64 7,6304 15/16 1/4 11,363 4 27/32 13/64 9,5955 3/8 3/16 11,363 5 5/16 5/32 9,937

5 1/32 3/16 11,065 4 31/32 5/32 9,6735 9/32 12,569 4 29/32 15/64 10,768

5 7/16 7/32 12,813 5 11/32 11/64 10,6475 3/32 7/32 12,481 5 1/32 3/16 11,0655 9/16 9/32 15,787 5 1/2 1/4 14,2884 7/8 7/32 10,179 4 25/32 11/64 8,444

5 5/16 5/32 9,937 5 1/4 1/8 8,5354 31/32 5/32 9,673 4 29/32 1/8 8,305

5 9/32 12,569 4 29/32 15/64 10,7685 7/16 7/32 12,813 5 11/32 11/64 10,6475 3/32 7/32 12,481 5 1/32 3/16 11,065

5 15/32 15/64 13,547 5 13/32 13/64 12,0855 5/32 1/4 13,922 5 1/16 13/64 11,7705 21/32 21/64 18,083 5 17/32 17/64 15,0355 21/32 21/64 18,083 5 17/32 17/64 15,0355 3/8 13/64 12,125 5 9/32 5/32 10,072

5 13/32 13/64 12,085 5 11/32 11/64 10,6475 7/16 13/64 11,862 5 3/8 11/64 10,3755 23/32 5/32 11,590 5 11/16 9/64 10,7735 11/32 3/16 12,215 5 9/32 5/32 10,6425 1/2 17/64 14,945 5 13/32 7/32 12,821

5 17/32 17/64 15,035 5 7/16 7/32 12,8135 27/32 7/32 14,926 5 25/32 3/16 13,2455 15/32 1/4 15,441 5 3/8 13/64 13,0135 9/16 19/64 16,391 5 15/32 1/4 14,2315 19/32 19/64 16,546 5 1/2 1/4 14,2885 29/32 1/4 16,633 5 13/16 13/64 14,0825 1/2 17/64 16,264 5 7/16 15/64 14,625

5 25/32 25/64 21,230 5 21/32 21/64 18,0836 1/16 21/64 21,017 5 31/32 9/32 18,3675 15/32 1/4 14,231 5 3/8 13/64 12,1255 1/2 1/4 14,288 5 13/32 13/64 12,085

5 13/16 13/64 14,082 5 3/4 3/16 12,4155 13/32 7/32 13,815 5 11/32 3/16 12,2155 5/8 21/64 17,861 5 17/32 9/32 15,665

5 21/32 21/64 18,083 5 9/16 9/32 15,7875 15/16 17/64 17,497 5 7/8 15/64 15,7765 9/16 19/64 17,929 5 15/32 1/4 15,4415 23/32 23/64 19,644 5 5/8 5/16 17,3116 1/32 5/16 20,127 5 29/32 1/4 16,6336 7/32 13/32 25,569 6 3/32 11/32 21,914

Engineering Reference Data

Page 270: Nov mud motor handbook

Motor Handbook, 7th Edition

262

Drill Pipe New Tool Joint Data

NomSize

NomWeight

Type Upset

and GradeConnection

NewOD

NewID

Make-upTorque6

in lb/ft in in lb-ft5 19.50 IEU-E75 NC50 6 5/8 3 3/4 22,361 P5 19.50 IEU-X95 NC50 6 5/8 3 1/2 26,674 P

19.50 IEU-X95 5 H90 6 1/2 3 1/4 30,732 P5 19.50 IEU-G105 NC50 6 5/8 3 1/4 30,730 P

19.50 IEU-G105 5 H90 6 1/2 3 34,805 P5 19.50 IEU-S135 NC50 6 5/8 2 3/4 38,036 P

19.50 IEU-S135 5 1/2 FH 7 1/4 3 1/2 43,328 P5 25.60 IEU-E75 NC50 6 5/8 3 1/2 26,674 P

25.60 IEU-E75 5 1/2 FH 7 3 1/2 37,742 B5 25.60 IEU-X95 NC50 6 5/8 3 34,520 P

25.60 IEU-X95 5 1/2 FH 7 3 1/2 37,742 B5 25.60 IEU-G105 NC50 6 5/8 2 3/4 38,036 P

25.60 IEU-G105 5 1/2 FH 7 1/4 3 1/2 43,328 P5 25.60 IEU-S135 5 1/2 FH 7 1/4 3 1/4 47,230 B

5 1/2 21.90 IEU-E75 5 1/2 FH 7 4 33,412 P5 1/2 21.90 IEU-X95 5 1/2 FH 7 3 3/4 37,742 B

21.90 IEU-X95 5 1/2 H90 7 3 1/2 34,820 P5 1/2 21.90 IEU-G105 5 1/2 FH 7 1/4 3 1/2 43,328 P5 1/2 21.90 IEU-S135 5 1/2 FH 7 1/2 3 52,059 P5 1/2 24.70 IEU-E75 5 1/2 FH 7 4 33,412 P5 1/2 24.70 IEU-X95 5 1/2 FH 7 1/4 3 1/2 43,328 P5 1/2 24.70 IEU-G105 5 1/2 FH 7 1/4 3 1/2 43,328 P5 1/2 24.70 IEU-S135 5 1/2 FH 7 1/2 3 52,059 P6 5/8 25.20 IEU-E75 6 5/8 FH 8 5 43,934 P

IEU-X95 6 5/8 FH 8 5 43,934 PIEU-G105 6 5/8 FH 8 1/4 4 3/4 51,280 PIEU-S135 6 5/8 FH 8 1/2 4 1/4 65,012 P

6 5/8 27.70 IEU-E75 6 5/8 FH 8 5 43,934 PIEU-X95 6 5/8 FH 8 1/4 4 3/4 51,280 P

IEU-G105 6 5/8 FH 8 1/4 4 3/4 51,280 PIEU-S135 6 5/8 FH 8 1/2 4 1/4 65,012 P

Note: Tool joint diameters specified are required to retain torsional strength in the tool joint comparable to the torsional strength of the attached drill pipe. These should be adequate for all service. Tool joints with torsional strengths considerably below that of the drill pipe may be adequate for much drilling service.

Page 271: Nov mud motor handbook

263

Premium Class Class 2

Min ODTool Joint

Min BoxShoulder

w/ EccentricWear

Make-upTorque for Min OD

Tool Joint

Min ODTool Joint

Min BoxShoulder

w/ EccentricWear

Make-upTorque for Min OD Tool Joint

in in lb-ft in in lb-ft5 7/8 15/64 15,776 5 13/16 13/64 14,082

6 1/32 5/16 20,127 5 15/16 17/64 17,4975 27/32 19/64 19,862 5 3/4 1/4 17,1166 3/32 11/32 21,914 6 19/64 19,2445 29/32 21/64 21,727 5 13/16 9/32 18,9406 5/16 29/64 28,381 6 3/16 25/64 24,6456 3/4 3/8 28,737 6 5/8 5/16 24,412

6 1/32 5/16 20,127 5 15/16 17/64 17,4976 1/2 1/4 20,205 6 13/32 13/64 17,1276 7/32 13/32 25,569 6 3/32 11/32 21,9146 21/32 21/64 25,483 6 9/16 9/32 22,2946 9/32 7/16 27,437 6 5/32 3/8 23,728

6 23/32 23/64 27,645 6 5/8 5/16 24,4126 15/16 15/32 35,446 6 13/16 13/32 30,9436 15/32 15/64 19,172 6 13/32 13/64 17,1276 5/8 5/16 24,412 6 17/32 17/64 21,2466 3/16 21/64 24,414 6 3/32 9/32 21,349

6 23/32 23/64 27,645 6 19/32 19/64 23,3506 15/16 15/32 35,446 6 13/16 13/32 30,9436 9/16 9/32 22,294 6 15/32 15/64 19,1726 23/32 23/64 27,645 6 19/32 19/64 23,3506 25/32 25/64 29,836 6 11/16 11/32 26,5607 1/32 33/64 38,901 6 7/8 7/16 33,1807 7/16 1/4 26,810 7 3/8 7/32 24,1007 5/8 11/32 35,139 7 1/2 9/32 29,552

7 11/16 5/8 37,983 7 19/32 21/64 33,7307 29/32 31/64 48,204 7 25/32 27/64 42,3127 1/2 9/32 29,552 7 13/32 15/64 25,451

7 11/16 3/8 37,983 7 9/16 5/16 32,3297 3/4 13/32 40,860 7 21/32 23/64 36,556

8 17/32 52,714 7 27/32 29/64 45,241

Footnotes: 1. The use of outside diameters (OD) smaller than those listed in the table may be acceptable due to special service requirements.

2. Tool joint with dimensions shown has lower torsional yield ratio than the 0.80 which is generally used.

3. Recommended make-up torque is based on 72,000 psi stress.

4. In calculation of torsional strengths of tool joints, both new and worn, the bevels of the tool joint shoulders are disregarded. This thickness measurement should be made in the plane of the face from the ID of the counter bore to the outside diameter of the box, disregarding the bevels.

5. Any tool joint with an outside diameter less than API bevel diameter should be provided with a minimum 1/32” depth x 45° bevel on the outside and inside diameter of the box shoulder and outside diameter of the pin shoulder.

6. P = Pin limit, B = Box limit.

This table taken from API Recommended Practice 7G, Sixteenth Edition, December 1, 1998.

Engineering Reference Data

Page 272: Nov mud motor handbook

Motor Handbook, 7th Edition

264

SizeOD

1NominalWeight

NewClass

2Torsional DataTorsional Yield Strength

(lb-ft)(in) (lb/ft) E75 X95 G105 S135

2 3/8 4.85 New 4,763 6,033 6,668 8,574Premium 3,725 4,719 5,215 6,705Class 2 3,224 4,083 4,513 5,802

6.65 New 6,250 7,917 8,751 11,251Premium 4,811 6,093 6,735 8,659Class 2 4,130 5,232 5,782 7,434

2 7/8 6.85 New 8,083 10,238 11,316 14,549Premium 6,332 8,020 8,865 11,397Class 2 5,484 6,946 7,677 9,871

10.40 New 11,554 14,635 16,176 20,798Premium 8,858 11,220 12,401 15,945Class 2 7,591 9,615 10,627 13,663

3 1/2 9.50 New 14,146 17,918 19,805 25,463Premium 11,094 14,052 15,531 19,968Class 2 9,612 12,176 13,457 17,302

13.30 New 18,551 23,498 25,972 33,392Premium 14,361 18,191 20,106 25,850Class 2 12,365 15,663 17,312 22,258

15.50 New 21,086 26,708 29,520 37,954Premium 16,146 20,452 22,605 29,063Class 2 13,828 17,515 19,359 24,890

4 11.85 New 19,474 24,668 27,264 35,054Premium 15,310 19,392 21,433 27,557Class 2 13,281 16,823 18,594 23,907

14.00 New 23,288 29,498 32,603 41,918Premium 18,196 23,048 25,474 32,752Class 2 15,738 19,935 22,034 28,329

15.70 New 25,810 32,692 36,134 46,458Premium 20,067 25,418 28,094 36,120Class 2 17,315 21,932 24,241 31,166

4 1/2 13.75 New 25,907 32,816 36,270 46,633Premium 20,403 25,844 28,564 36,725Class 2 17,715 22,439 24,801 31,887

16.60 New 30,807 39,022 43,130 55,453Premium 24,139 30,576 33,795 43,450Class 2 20,908 26,483 29,271 37,634

20.00 New 36,901 46,741 51,661 66,421Premium 28,683 36,332 40,157 51,630Class 2 24,747 31,346 34,645 44,544

22.82 New 40,912 51,821 57,276 73,641Premium 31,587 40,010 44,222 56,856Class 2 27,161 34,404 38,026 48,890

18. Mechanical Properties of DrillpipeNew & Used (API Premium Class & API Class 2) Drillpipe Torsional and Tensile Data

Page 273: Nov mud motor handbook

265

SizeOD

1NominalWeight

NewClass

3Tensile DataLoad at Minimum Yield Strength

(lb)(in) (lb/ft) E75 X95 G105 S135

2 3/8 4.85 New 97,817 123,902 136,944 176,071Premium 76,893 97,398 107,650 138,407Class 2 66,686 84,469 93,360 120,035

6.65 New 138,214 175,072 193,500 248,786Premium 107,616 136,313 150,662 193,709Class 2 92,871 117,636 130,019 167,167

2 7/8 6.85 New 135,902 172,143 190,263 244,624Premium 106,946 135,465 149,725 192,503Class 2 92,801 117,549 129,922 167,043

10.40 New 214,344 271,503 300,082 385,820Premium 166,535 210,945 233,149 299,764Class 2 143,557 181,839 200,980 258,403

3 1/2 9.50 New 194,264 246,068 271,970 349,676Premium 152,979 193,774 214,171 275,363Class 2 132,793 168,204 185,910 239,027

13.30 New 271,569 343,988 380,197 488,825Premium 212,150 268,723 297,010 381,870Class 2 183,398 232,304 256,757 330,116

15.50 New 322,775 408,848 451,885 580,995Premium 250,620 317,452 350,868 451,115Class 2 215,967 273,558 302,354 388,741

4 11.85 New 230,755 292,290 323,057 415,360Premium 182,016 230,554 254,823 327,630Class 2 158,132 200,301 221,385 284,638

14.00 New 285,359 361,454 399,502 513,646Premium 224,182 283,963 313,854 403,527Class 2 194,363 246,193 272,108 349,852

15.70 New 324,118 410,550 453,765 583,413Premium 253,851 321,544 355,391 456,931Class 2 219,738 278,335 307,633 395,528

4 1/2 13.75 New 270,034 342,043 378,047 486,061Premium 213,258 270,127 298,561 383,864Class 2 185,389 234,827 259,545 333,701

16.60 New 330,558 418,707 462,781 595,004Premium 260,165 329,542 364,231 468,297Class 2 225,771 285,977 316,080 406,388

20.00 New 412,358 522,320 577,301 742,244Premium 322,916 409,026 452,082 581,248Class 2 279,502 354,035 391,302 503,103

22.82 New 471,239 596,903 659,734 848,230Premium 367,566 465,584 514,593 661,620Class 2 317,497 402,163 444,496 571,495

Engineering Reference Data

Page 274: Nov mud motor handbook

Motor Handbook, 7th Edition

266

SizeOD

1NominalWeight

NewClass

2Torsional DataTorsional Yield Strength

(lb-ft)(in) (lb/ft) E75 X95 G105 S1355 16.25 New 35,044 44,389 49,062 63,079

Premium 27,607 34,969 38,650 49,693Class 2 23,974 30,368 33,564 43,154

19.50 New 41,167 52,144 57,633 74,100Premium 32,285 40,895 45,199 58,113Class 2 27,976 35,436 39,166 50,356

25.60 New 52,257 66,192 73,159 94,062Premium 40,544 51,356 56,762 72,979Class 2 34,947 44,267 48,926 62,905

5 1/2 19.20 New 44,074 55,826 61,703 79,332Premium 34,764 44,035 48,670 62,575Class 2 30,208 38,263 42,291 54,374

21.90 New 50,710 64,233 70,994 91,278Premium 39,863 50,494 55,809 71,754Class 2 34,582 43,804 48,414 62,247

24.70 New 56,574 71,660 79,204 101,833Premium 44,320 56,139 62,048 79,776Class 2 38,383 48,619 53,737 69,090

6 5/8 25.20 New 70,580 89,402 98,812 127,044Premium 55,766 71,522 79,050 101,635Class 2 48,497 61,430 67,896 87,295

27.70 New 76,295 96,640 106,813 137,330Premium 60,192 77,312 85,450 109,864Class 2 52,308 66,257 73,231 94,155

Page 275: Nov mud motor handbook

267

SizeOD

1NominalWeight

NewClass

3Tensile DataLoad at Minimum Yield Strength

(lb)(in) (lb/ft) E75 X95 G105 S1355 16.25 New 328,073 415,559 459,302 590,531

Premium 259,155 328,263 362,817 466,479Class 2 225,316 285,400 315,442 405,568

19.50 New 395,595 501,087 553,833 712,070Premium 311,535 394,612 436,150 560,764Class 2 270,432 342,548 378,605 486,778

25.60 New 530,144 671,515 742,201 954,259Premium 414,690 525,274 580,566 746,443Class 2 358,731 454,392 502,223 645,715

5 1/2 19.20 New 372,181 471,429 521,053 669,925Premium 294,260 372,730 411,965 529,669Class 2 255,954 324,208 358,335 460,717

21.90 New 437,116 553,681 611,963 786,809Premium 344,780 436,721 482,692 620,604Class 2 299,533 379,409 419,346 539,160

24.70 New 497,222 629,814 696,111 894,999Premium 391,285 495,627 547,799 704,313Class 2 339,533 430,076 475,347 611,160

6 5/8 25.20 New 489,464 619,988 685,250 881,035Premium 387,466 490,790 542,452 697,438Class 2 337,236 427,166 472,131 607,026

27.70 New 534,199 676,651 747,877 961,556Premium 422,419 535,064 591,387 760,354Class 2 367,455 465,443 514,437 661,419

Footnotes: 1. New weight, nominal with threads and couplings.

New Drillpipe

2. Based on the shear strength equal to 57.7 percent of minimum yield strength and nominal wall thickness. Minimum torsional yield strength calculated from equation in RP7G, (16th edition) Appendix A, paragraph A.14.

3. Tensile data based on minimum values. Minimum tensile strength calculated from equation in API RP7G, (16th edition) Appendix A, paragraph A.13.

Premium Class

2. Based on the shear strength equal to 57.7 percent of minimum yield strength. Torsional data based on 20 percent uniform wear on outside diameter.

3. Tensile data based on 20 percent uniform wear on outside diameter.

Class 2

2. Based on the shear strength equal to 57.7 percent of minimum yield strength. Torsional data based on 30 percent uniform wear on outside diameter.

3. Tensile data based on 30 percent uniform wear on outside diameter.

This table taken from API Recommended Practice 7G, Sixteenth Edition, December 1, 1998.

Engineering Reference Data

Page 276: Nov mud motor handbook

Motor Handbook, 7th Edition

268

ANGLE(degrees)

ARC LENGTH

RADIUS

Arc Length (ft).017453 x Angle (°)

Arc Length (m).017453 x Angle (°)

R1 =

R2 =

BuildRate Radius of Curvature Build

Rate Radius of Curvature

°/100 ft(°/30m)

R1(feet)

R2 (meters)

°/100 ft(°/30m)

R1 (feet)

R2 (meters)

2 2865 859 82 70 214 1432 430 84 68 206 955 286 86 67 208 716 215 88 65 2010 573 172 90 64 1912 477 143 92 62 1914 409 123 94 61 1816 358 107 96 60 1818 318 95 98 58 1820 286 86 100 57 1722 260 78 105 55 1624 239 72 110 52 1626 220 66 115 50 1528 205 61 120 48 1430 191 57 125 46 1432 179 54 130 44 1334 169 51 135 42 1336 159 48 140 41 1238 151 45 145 40 1240 143 43 150 38 1142 136 41 155 37 1144 130 39 160 36 1146 125 37 165 35 1048 119 36 170 34 1050 115 34 175 33 1052 110 33 180 32 1054 106 32 185 31 956 102 31 190 30 958 99 30 195 29 960 95 29 200 29 962 92 28 210 27 864 90 27 220 26 866 87 26 230 25 768 84 25 240 24 770 82 25 250 23 772 80 24 260 22 774 77 23 270 21 676 75 23 280 20 678 73 22 290 20 680 72 21 300 19 6

19. Hole Curvature

FORMULA:

Page 277: Nov mud motor handbook

269

Engineering Reference Data

Alphabetical Subject Index

A Abrasives .........................................................................................35 Adjustable Assembly ..........................................................................7 Adjustable Operating Instructions .....................................................49 Air Drilling ..................................................................................21–24 AKO .............................................................. See Adjustable Assembly Aniline Point ...........................................................................8, 35, 37

B Back Reaming ..................................................................................40 Bearing Assembly ..............................................................................7 Mud Lubricated ............................................................................... 8 Oil Seal ........................................................................................... 7 Bearing Stack .....................................................See Bearing Assembly Bend Settings .............................................................................21, 51 Bent Coupling Housing .................................. See Adjustable Assembly BHA ...................................................................................................3 Bit Bounce .......................................................................................31 Bit Pressure Drop Limit ....................................................................33 Bit to Bend ...........................................................................57, 64–65 Black Max™ .....................................................................................52 BlackBox® ..............................................................................9, 16, 40 Build Rates ......................................................................................67 Buoyancy Factor ............................................................................248 Bypass Sub ..................................................................See Dump Sub Bypass Valve ................................................................ See Dump sub Bypass, Rotor ............................................................................41, 47

C Cement ............................................................................................35 Chlorides .........................................................................................37 Chunking ....................................................................... 22, 28, 33, 36 Coiled Tubing .............................................................................15, 24 Conversion Factors ................................................................242–243 Coring ..............................................................................................24 Corrosion ....................................................................... 21, 36, 37, 42 Coupling Assembly ........................................See Driveshaft Assembly

D Differential Pressure ................................................... 6, 28, 39, 58–61 Directional Drilling ............................................................................21 Drill Bit Sizes ..................................................................................246 Drill Bits .............................................................................................8 Drill Collar Weights ......................................................................... 249 Drilling Applications ....................................................................19–21 Drilling Fluids ...................................................................................34 Additives ....................................................................................... 38 Air or Two-Phase .........................................................See Air Drilling Chlorides ...................................................................................... 37 Drillpipe Properties .........................................................................264 Drillstring RPM Limit .........................................................................32 Driveshaft Assembly ...........................................................................7 Dump Sub ..............................................................................5, 25, 42 Dump Valve ................................................................... See Dump sub DuraPower™ ....................................................................................12 Dusting .............................................................................................23

Page 278: Nov mud motor handbook

Motor Handbook, 7th Edition

270

E Elastomers .......................................................................................15 Endplay ............................................................................................42 Erosion ............................................................................................35 Even Wall Elastomer ...................................................................12, 39

F Fit of Rotor and Stator ......................................................................39 Fit of Rotor and Stator ......................................................................33 Fixed Cutter ........................................................................................8 Fixed Housing ....................................................................................7 Flex Coupling .................................................See Driveshaft Assembly Flow Rate ...............................................................................6, 20, 67 Flow Restrictors ...............................................................................33 Foam ...............................................................................................21

H H2S .................................................................................See Sour Gas Heavy Walled Drillpipe ....................................................................247 HEMIDRIL ........................................................................................12 High Gravity Solids (HGS) ................................................................35 HNBR, .......................................................................................15, 36 Hole Curvature ...............................................................................268 Hot Hole ..........................................................................................26 Hydraulic Extension ..........................................................................40 Hydraulic Power .............................................................................241

I ITrax ................................................................................................44

L Lobe Configurations ...........................................................................6 Lost Circulation Material (LCM) ..................................................35, 38 Low Gravity Solids (LGS) .................................................................35

M Maintenance ....................................................................................42 Make-up Torque Black Max™ Adjustable ................................................................ 53 Drill Collars ................................................................................. 248 Drillpipe & Tool Joints ................................................................. 256 Lock Housings .............................................................................. 51 Stabilizers ....................................................................................... 9 Top Subs ...................................................................................... 43 Maximum Flow Rates .................................................................58–61 Microstalling ...................................................................See Stick Slip Milling ..............................................................................................24 ML3 Mud Lubricated Technology ......................................................11 Mouseholes .....................................................................................24 Mud .................................................................................................34 Mud Density .....................................................................................35

N NBR ...........................................................................................15, 36 Nitrogen ...........................................................................................23 No-bypass .................................................................................10, 41 Nozzle ........................................................................................41, 47

Page 279: Nov mud motor handbook

271

Engineering Reference Data

O Off Bottom ...........................................................................26, 41, 68 Oil Based Mud (OBM) .................................................................35, 36 Output Shaft Assembly .......................................See Bearing Assembly Over-Running the Bit ........................................................................28

P Performance Curves - How to Use .............................................67–69 Performance Drilling .........................................................................20 pH Levels .........................................................................................35 Plugging Off .....................................................................................40 Power Rib ..................................................................................12, 14 Power Section ................................................................................5–7 PowerPLUS™ ........................................................................6, 13, 15 Pressure De-rating ...........................................................................39 Pressure Drop .............................................................. 32, 33, 66, 239 Pull to Re-run .......................................................................57, 64–65 Pull to Yield ..........................................................................57, 64–65 Pulling Out Of Hole (POOH) ..............................................................42

R Rat holes .........................................................................................24 Reactive Torque ...............................................................................27 Rotary Drilling ......................................................................21, 32, 67 Rotary Steerable System (RSS) ............................................10, 12, 41 Rotating String .................................................................................32 Running In .......................................................................................25

S Sand Content ...................................................................................35 Servicing a Motor .............................................................................44 Soft Stall ..........................................................................................42 Sour Gas ..........................................................................................36 Spudding .........................................................................................24 Square motor ...................................................................................20 SR3 Short Radius Technology ..........................................................11 ST1 Sealed Bearing Technology ........................................................10 ST2 Sealed Bearing Technology ........................................................10 ST2H Sealed Bearing Technology .....................................................10 ST3 Sealed Bearing Technology ........................................................10 Stabilizers ....................................................................................9, 67 Stall .....................................................................................28, 40, 54 Stick Slip .....................................................................................8, 29

T Temperature, ....................................................................................39 Top Sub, ............................................................................................5 Motor Catch Top Sub ...................................................................... 5 Rotor Catch Top Sub ....................................................................... 5 Torque .......................................................................................58–61 Total Flow Area (TFA) .....................................................................241 Track-A-Tool (TAT) ............................................................................44 Transmission .................................................See Driveshaft Assembly Tripping Out .....................................................................................42 Troubleshooting ...............................................................................54 Twin Torque Nut ...............................................................................11

Page 280: Nov mud motor handbook

Motor Handbook, 7th Edition

272

U Universal Joint ...............................................See Driveshaft Assembly U-tubing ...........................................................................................40

V Vector™ ...........................................................................................13 Vertical Drilling .................................................................................20 VibraSCOPE™ ................................................................ 16, 29, 32, 40 Vibration ..........................................................................................28 Axial ............................................................................................. 31 Lateral .......................................................................................... 30 Torsional ....................................................................................... 29

W Warming Up a Motor ........................................................................26 Wash Out .........................................................................................54 Water Based Mud (WBM) .................................................................38 Whirl ................................................................................................30 WOB ....................................................................................57, 62–63 Workover .........................................................................................24

Page 281: Nov mud motor handbook

273

Version History

Version 7.3 – July 2010First Printed Version

Version 7.4 – May 2011Page 10 - 24XH motor now referred to as ST2H to differentiate it as

having higher torque capabilities than the ST2 (24 & 24X)

Page 24 - Changed 1 7/16” to 1 11/16”

Page 40 - Revised Back Reaming section Page 58-59 - Updated values for new Monoflo CT power sections Page 61 - Corrected 5” 7/8 3.8 HEMI Torque @ Max Pressure from 5964 to 4480 ft-lbs (8,090 to 6,070 N-m) Page 70 - Remove 1 11/16” 5/6 4.4 Stage CT power section Page 70-71 - Replaced power section specs with new Monoflo CT power sections Page 73 - Added 2 7/8” 5/6 3.5 Stage CT HEMDRIL power section w/ ST3 motor and straight housing

Page 75 - Added 2 7/8” 5/6 7.0 Stage CT power section Page 76-236 - Append “@ 0°” to “Max Effective OD of Slick Motor @ Adjusting Ring” Page 76-236 - Updated build rates as per latest calculations Page 160-161 - Added 6 3/4” 7/8 5.0 Stage SR3 Performance Spec Sheet

Page 208 - Added missing dimensions for 2 7/8” 5/6 3.5 Stage HEMIDRIL CT w/ ST2 motor

Page 110 - Added 4 3/4” 7/8 2.6 Stage power section

Page 273 - Added Version History Page

Page 282: Nov mud motor handbook
Page 283: Nov mud motor handbook
Page 284: Nov mud motor handbook

© 2011 National Oilwell Varco PP010000857-MKT-001-Rev05

[email protected] w w w . n o v . c o m

National Oilwell Varco has produced this brochure for general information only, and it is not intended for design purposes. Although every effort has been made to maintain the accuracy and reliability of its contents, National Oilwell Varco in no way assumes responsibility for liability for any loss, damage or injury resulting from the use of information and data herein. All applications for the material described are at the user’s risk and are the user’s responsibility.All brands listed are trademarks of National Oilwell Varco.

Downhole Solutions

Drilling Solutions

Engineering and Project Management Solutions

Lifting and Handling Solutions

Production Solutions

Supply Chain Solutions

Tubular and Corrosion Control Solutions

Well Service and Completion Solutions

One Company . . . Unlimited Solutions

Corporate Headquarters

7909 Parkwood Circle Drive

Houston, Texas 77036

United States

Phone: 713 375 3700

Fax: 713 346 7687

For a complete list of NOV Downhole locations, visit us online:

www.nov.com/downholelocations