HydroPull™

June 2010

All rights reserved

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HydroPull™ Water Hammer ValveSelf-piloted flow cycling valve generates water hammer pulses

that vibrate the coil Features

– Pulls coil into the well– Enhances weight transfer while milling– Low pressure differential – under 300 psi

– Compatible with motors, jetting tools or logging tools– Compact length– Nitrogen compatible– High-temperature

Benefits– Extends coil reach– Faster milling when weight is limited– Faster hole cleaning – shorter wash time– Well stimulation

U.S. Patents 6,237,701

and 7,139,219

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Water Hammer Pulse Sequence

0

100

200

300

400

500

600

1.4 1.6 1.8 2 2.2 2.4

Time, s

Pre

ssu

re, p

si

Valve Closed Valve Open

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2.88-inch HydroPull™ Kit

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1.69-inch HydroPull™ Kit

Bullhead Nozzle

HydroPull™

Debris Screen

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HydroPull™ SpecificationsDiameter

1.69" (43

mm)

2.12”

(54 mm)

2.88” (73

mm)Connected

length with screen sub

40.01” (1016 mm)

43.55” (1106 mm)

58.70” (1491 mm)

Connections 1” AMMT 1-1/2” AMMT2-3/8” PAC-DSI

(mod)

Design flow rate

1.0  - 1.6 bpm (160 - 250 lpm)

1.2 - 1.8 bpm(190 - 290 lpm)

2.5 - 3.5 bpm (400 - 550 lpm)

Average pressure

differential

360 – 720 psid(2.5 – 5.0 MPa)

360 – 720 psid(2.5 – 5.0 MPa)

300 - 500 psid (2.2 – 3.5 MPa)

Pulse cycle rate

8 – 12 Hz 10 – 15 Hz 6 – 12 Hz

Traction force1300 – 2000 lbf (600 – 900 daN)

2300 – 3000 lbf (1000 – 1300

daN)

2200 - 3200 lbf *(1000 - 1400 daN)

* Standard tool configuration; High- and Low-Impact configurations also available

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High Temperature Multi Fluid

Sour gas All H2S compatible materials

Max. temperature

400°F (200°C)

Fluid compatibility

Clear fluids: water, 1% acid, 3% KCl, scale dissolvers, frac oil

28% acid capable tools are available in the 1.69” and 2.13” sizes

Gas compatibility

Multiphase with fluid: air, carbon dioxide, nitrogen

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HydroPull™ Extended Reach Action

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Extended Reach Case History Apache CO2 Injection Well Williston Basin

– 6.1-in dia. 3300-ft horizontal openhole Objective: run to TD with 1.5-in coil

– RIH at 1.3 bpm, 20 to 30 ft/min– RIH Final 850 ft at 1.6 bpm, 10 ft/min– Placed solvent for overnight soak– Reentered well to TD with HydroPull™ – Lifted with commingled nitrogen/water

Lateral range extended by 850 ft (35%)– Another 300-600 ft possible

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Extended Reach (Coil Weight)

Predicted Lockup 7220-ft MD

8070-ft TD with 1.69 HydroPull™

1.6 bpm 10 ft/min feed

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Valved Closed 20 ms

Valve Open 80 ms

30-m

250-300 lpm Acid

Acid Squeezed into Formation

20-ms Acid Pulse 500-600 lpm

60-m

Localized Acid Squeeze Pulse

1. Valve Open

2. Valve Closed, Pressure Builds in Coil

3. Valve Opens - Releasing Pressure Pulse

Re-Establish Flow

Acid or Solvent Pulsing

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Extended Reach Stimulation 2 Wells in Husky Heavy Oil Field (Lloydminster AB) 1.69-in diameter HydroPull™ on 1.5-inch coiled tubing Bullnose nozzle Well #1: 1970-ft horizontal with 7-in liner

– Previous attempts stopped by obstructions below 3100 ft

– HydroPull™ run on1.3 bpm produced water with 15% solvent

– Reached TD at 10 to 30 ft/min

– Oil production increased from 44 bpd to 600 bpd Well #2: 2950-ft horizontal with 5.5-in liner

– Placed 50 cu-m water with 3% KCl and 2% MudSol

– Ran in at 10 to 20 ft/hr

– Production increased from 25 to 44 bpd Stimulation operations are ongoing

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Bridge Plug Milling 5 Well Program for Devon (McAlester, OK)

– 3.25 bpm with 0.5 bpm bypass though MGS

– 5500-ft, 5.5” horizontals, MD 13,000-ft

– 8 plugs in each well

– 2.88-inch diameter BHA, Tricone mill

– MGS™/Agitator/Motor/Mill: 40 min/plug

– HydroPull™ /MGS™/Motor/Mill: 8 min/plug, surface vibration too intense

– MGS™/HydroPull™/Motor/Mill: 15 min/plug, surface vibration OK,

– 2 plugs milled with nitrogen & water Other Successful Jobs

– SEECO (Southwest Energy)

– Ultra Resources

HydroPull™

MGS™

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Marcellus Shale Wells 5 Well Program for Talisman (Marcellus Shale, NY)

– 5000 to 6000-ft, 5.5” horizontals, MD 12,000-ft – Horizontal inclined up to 95 degrees– High wellhead pressure and sand flow on last HydroPull™ well– 13 to 15 plugs in each well– 2.88-inch diameter BHA: HydroPull/Motor/Mill 2.7 bpm

31 plugs milled with HydroPull / 37 milled with beads and chemicals – Plug milling time in heel of well reduced from 60- to 36-min.– Plug milling time in toe of well reduced from 147- to 36-min– Eliminated high cost of beads and friction reducing chemical– Operator “very impressed with tool”

Tool issues– Bladed bits produce oversize cuttings when run with HydroPull™

» Use FB instead of Dragtooth mill

– Coil bulge and wear in tapered coil » Avoid tapered coil» Cut coil if the kink is bad.

– O-ring failure in disconnect» Tools must be in good condition

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Milling Case History Summary HydroPull™ enhances weight transfer while milling

– Large reductions in plug milling time– Most improvement at the toe of the well– Outperforms NOV Agitator– Eliminates high cost of friction reducing beads and

chemicals– Works with nitrogen and Motor Gas Separator (MGS™)

Tool is reliable– Care is required with coil connections– Use less aggressive bits

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Damage Removal/Cleanup

HydroPull

Valve Closed

Suction Pressure Pulse

Annulus Flow

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Applications Extended Reach Bridge Plug Milling

– More than 6000 ft is possible with 2” coil– Upper limit is not known

Extended Reach Well Stimulation– Solvent or chemical placement– Acidizing with 1.69-in Hastelloy tool or with a circulating valve

Other– Fishing– Valve milling– Gravel pack placement– Ceramic disk removal– Cementing– Coiled tubing drilling