utf 8''varel dforce-catalog_web_1
TRANSCRIPT
A Brief
Introduction
Ridgeback MarathonTM
and
Ridgeback D-ForceTM Comparison
Innovation, Evolution,
Features and Benefits
Blast Hole Bits
Tungsten Carbide
Industrial Bits
Mineral
Exploration Bits
Steel Tooth Product Range
Pilot Bits
Additional Useful Data
1-2
3
4-5
6-10
11
12
13-16
17
18-21
TABLE OF CONTENTS
C E R T I F I E D
1
Mission Statement“We will deliver ever-increasing value to our customers and other stakeholders by exceeding industry standards for performance,
service and innovation.”
Company ValuesWe believe that people make a successful business.
We are a team of passionate people who :
Vision Statement“We will be recognized as a leading global drill bit company”
Value our employees for their dedication and innovation.
Are accountable to our stakeholders.
Reliably provide products and service.
Ethically interact with our customers, competitors, vendors and community.
Lead in generating value for our customers.
DEDICATED TO DRILL BITS
Varel International is focused exclusively on producing world class drilling bits.
We are committed to introducing drill bit innovation in partnership with our customers.
We are a dedicated specialist drill bit manufacturer with more than 50 years experience.
Development of Varel rock bits
since
After its founding in 1947,
Varel International remained a
family owned business until 1998,
and is now majority owned
by the Arcapita (USA) Group.
Building on the success of
the patented Ridgeback series,
the introduction of the new
Ridgeback MarathonTM and
Ridgeback D-ForceTM Series
combines many of the existing
field-proven features, plus a
new high load SP1 bearing
package, reinforced gage and
shirttail protection features.
These Ridgeback D-ForceTM
features have been
introduced to increase
performance in highly
abrasive conditions.
The introduction of the patented
Varel Ridgeback series produced the
first generation of advanced
technology features designed for
longer life bearings, improved
cutting structures, and the famous
Ridgeback shirttail concept.
All of these features greatly
assists hole cleaning resulting
in extended bit life.
2000
2008
2
3
Backed by years of field-proven technology and expertise, Varel has become the leading provider of high performance drill bits.Our technological advances embrace the use of highly sophisticated computer technology, premium raw materials and thousands of "on the job man hours", all aimed at reducing our customers’ cost of drilling.
Marathon TM & D-Force TM - feature comparison
Ridgeback TM Marathon Blast Hole
Ridgeback D-Force TM Blast Hole
HET carbide treatment
Vented cones
Tough & wear resistant cutting structure
New SP1 advanced bearing design
Ridgeback
Ridgeback MarathonTM products contain new longer life bearings, additional gage protection, and improved cutting structure elements for use in high pull-down applications.
Ridgeback D-ForceTM products contain new longer life bearings,
heavy duty shirttails, and improved abrasion resitant tungsten carbide
inserts for use in extremely abrasive applications.
Tougher carbide grades
HET carbide treatment
Vented cones
Increased hole wall
clearance
New abrasion resistant
carbide grades
New SP1 advanced bearing design
Sidewinder shirttail/gage
protection
4
INTRODUCING RIDGEBACK MARATHONTM AND RIDGEBACK D-FORCETM SERIES
Varel International is continually improving its’ series of three cone drill bits designed for the blasthole industry. The Ridgeback MarathonTM and Ridgeback D-ForceTM series, incorporate the most advanced features available today in air circulation rock bits.
New advances in computer technology have allowed Varel to develop proprietary rock bit design software that enables design changes to be introduced rapidly. This exclusive software aids the engineer with bit design analysis and includes such factors as drill operating parameters, bit geometry and mine lithology.
By using this software, Varel’s engineers are able to predict the effects of design modifications and limit the risks associated with new product development.
RIDGEBACK DESIGN TECHNOLOGY
High Energy Tumbling
CarbideShirttailProtection
Main RollerBearing
BallBearing
Pilot Bearing
AirPassageways
Air Vent Holes
High Energy Tumbling
Thrust Faces
ThrustButton
INNOVATION AND EVOLUTION
5
Enhanced Cutter Design The Ridgeback MarathonTM and Ridgeback D-ForceTM design process provides the highest penetration rates and longest life available.
Maximum Gage Protection SRT (Semi Round Top) tungsten carbide and welded hardmetal provide superior wear resistance to the shirttail area. This Sidewinder feature is particularly effective in unstable/fractured formations and also during collaring.
Vented Cones Vented cones are standard in all Ridgeback MarathonTM and Ridgeback D-ForceTM series bits 9” and larger in diameter. Vented cones allow a continuous air flow throughout the bearings to provide better cooling and cleaning. See page 20 for recommended nozzle sizes when using bits with vented cones.
• Longer bearing life
• Increased penetration
• Added gage penetration
• Reduced heat generation
• Larger cuttings
• Less dust
Innovation Advantages
Advanced Bearing DesignAll Ridgeback MarathonTM and Ridgeback D-ForceTM rock bits incorporate bearings designed to minimize heating. The wear elements feature advanced materials to give the maximum bearing life under a wide variety of operating conditions.
Improved Thrust CapacityBearing thrust capacity is often the limiting factor in bearing life. Ridgeback MarathonTM bits feature an improved thrust face design which minimizes outward thrust wear to prolong bearing life.
High Energy TumblingTM
Precision manufactured inserts are further processed for maximum toughness. Varel’s HET TM - High Energy TumblingTM process (patented) - gives the inserts a unique surface toughness that extends bit life.
SERIES FEATURES AND BENEFITS
RIDGEBACK
MARATHON
RIDGEBACK
D-FORCE
Back Flow ValvesBFV’s are available for wet conditions on both Ridgeback MarathonTM and Ridgeback D-ForceTM models.
COMPRESSIVE STRENGTHS: 2,000 - 10,000 (psi)
DRILLING SPEEDS: 70 to 120 rpm
JET CIRCULATION: All sizes
DRILLING WEIGHTS: 2,000 to 4,000
(lbs/inch of bit diameter)
6
APPLICATIONS: MARATHON : For use in less abrasive formations such as shales, limestones, carbonates, most metamorphic formations and most copper bearing formations.
D-FORCE : For use in more abrasive formations containing sand, silica, quartz, most ignious formations and most gold bearing formations.
RB30/DF30 series
All soft formation bits are designed with aggressive cutter profiles to provide extremely high penetration rates.
SOFT FORMATION INSERT BITS
COMPRESSIVE STRENGTHS: 5,000 - 15,000 (psi)
DRILLING SPEEDS: 70 to 120 rpm
JET CIRCULATION: All sizes
DRILLING WEIGHTS: 2,000 to 4,500
(lbs/inch of bit diameter)
APPLICATIONS: MARATHON : For use in less abrasive formations such as shales, limestones, carbonates, most metamorphic formations and most copper bearing formations.
D-FORCE : For use in more abrasive formations containing sand, silica, quartz, most ignious formations and most gold bearing formations.
RB40/DF40 series
COMPRESSIVE STRENGTHS: 8,500 - 23,500 (psi)
DRILLING SPEEDS: 70 to 120 rpm
JET CIRCULATION: All sizes
DRILLING WEIGHTS: 2,000 to 5,000
(lbs/inch of bit diameter)
APPLICATIONS:
D-FORCE : For use in more abrasive formations containing sand, silica, quartz, most ignious formations and most gold bearing formations.
DF43 series
Cutting structures may vary from those shown where RB and DF series bits share the same series number (i.e. RB40/DF40).
Ridgeback D-Force(Sidewinder)
The Ridgeback MarathonTM series contains new longer life bearings,
additional gage protection, and improved cutting structure elements
for use in high pull-down applications.
The Ridgeback D-ForceTM series includes many of our Ridgeback MarathonTM features with additional gage protection and a heavy duty Sidewinder leg which is designed for extremely abrasive applications and drilling conditions where difficult hole cleaning, or extreme formations, require maximum shirttail protection.
COMPRESSIVE STRENGTHS: 25,000 - 45,000 (psi)
DRILLING SPEEDS: 60 to 100 rpm
JET CIRCULATION: All sizes
DRILLING WEIGHTS: 3,000 to 6,000
(lbs/inch of bit diameter)
7
Medium formation bits are most commonly used in the mining industry, and provide long bearing life with additional insert strength for consolidated formations.
MEDIUM FORMATION INSERT BITS
STRENGTHS: 10,000 - 30,000 (psi)
DRILLING SPEEDS: 70 to 120 rpm
JET CIRCULATION: All sizes
DRILLING WEIGHTS: 2,500 to 5,000
(lbs/inch of bit diameter)
APPLICATIONS:
MARATHON : For use in less abrasive formations such as shales, limestones, carbonates, most metamorphic formations and most copper bearing formations.
COMPRESSIVE STRENGTHS: 15,000 - 35,000 (psi)
DRILLING SPEEDS: 70 to 120 rpm
JET CIRCULATION: All sizes
DRILLING WEIGHTS: 2,500 to 5,000
(lbs/inch of bit diameter)
APPLICATIONS: MARATHON : For use in less abrasive formations such as shales, limestones, carbonates, most metamorphic formations and most copper bearing formations.
D-FORCE : For use in more abrasive formations containing sand, silica, quartz, most ignious formations most gold bearing formations.
APPLICATIONS: MARATHON : For use in less abrasive formations such as shales, limestones, carbonates, most metamorphic formations and most copper bearing formations.
D-FORCE : For use in more abrasive formations containing sand, silica, quartz, most ignious formations most gold bearing formations.
Cutting structures may vary from those shown where RB and DF series bits share the same series number (i.e. RB40/DF40).
RB50 series
RB53/DF53 series
RB60/DF60 series
Ridgeback D-Force(Sidewinder)
The Ridgeback MarathonTM series contains new longer life bearings,
additional gage protection, and improved cutting structure elements
for use in high pull-down applications.
The Ridgeback D-Force series includes many of our Ridgeback Marathon features with additional gage protection and a heavy duty Sidewinder leg which is designed for extremely abrasive applications and drilling conditions where difficult hole cleaning, or extreme formations, require maximum shirttail protection.
COMPRESSIVE STRENGTHS: 27,500 - 47,500 (psi)
DRILLING SPEEDS: 60 to 100 rpm
JET CIRCULATION: All sizes
DRILLING WEIGHTS: 3,000 to 6,000
(lbs/inch of bit diameter)
8
APPLICATIONS:
MARATHON : For use in less abrasive formations such as shales, limestones, carbonates, most metamorphic formations and most copper bearing formations.
RB63/DF63 series
All medium hard formation bits are designed with aggressive cutter profiles to provide extremely high penetration rates
when higher pulldown is needed.
MEDIUM HARD FORMATION INSERT BITS
COMPRESSIVE STRENGTHS: 30,000 - 50,000 (psi)
DRILLING SPEEDS: 60 to 100 rpm
JET CIRCULATION: All sizes
DRILLING WEIGHTS: 3,000 to 6,500
(lbs/inch of bit diameter)
APPLICATIONS: MARATHON : For use in less abrasive formations such as shales, limestones, carbonates, most metamorphic formations and most copper bearing formations.
D-FORCE : For use in more abrasive formations containing sand, silica, quartz, most ignious formations most gold bearing formations.
RB67/DF67 series
Cutting structures may vary from those shown where RB and DF series bits share the same series number (i.e. RB40/DF40).
Ridgeback D-Force(Sidewinder)
The Ridgeback MarathonTM series contains new longer life bearings,
additional gage protection, and improved cutting structure elements
for use in high pull-down applications.
The Ridgeback D-ForceTM series includes many of our Ridgeback MarathonTM features with additional gage protection and a heavy duty Sidewinder leg which is designed for extremely abrasive applications and drilling conditions where difficult hole cleaning, or extreme formations, require maximum shirttail protection.
9
All hard formation bits are designed with tough low extension cutter profiles to provide maximum durability
in hard formations.
HARD/VERY HARD FORMATION INSERT BITS
STRENGTHS: 35,000 - 60,000 (psi)
DRILLING SPEEDS: 50 to 90 rpm
JET CIRCULATION: All sizes
DRILLING WEIGHTS: 4,000 to 7,500
(lbs/inch of bit diameter)
APPLICATIONS: MARATHON : For use in less abrasive formations such as shales, limestones, carbonates, most metamorphic formations and most copper bearing formations.
D-FORCE : For use in more abrasive formations containing sand, silica, quartz, most ignious formations most gold bearing formations.
COMPRESSIVE STRENGTHS: 50,000 (psi) and Higher
DRILLING SPEEDS: 40 to 70 rpm
JET CIRCULATION: All sizes
DRILLING WEIGHTS: 5,000 to 8,000
(lbs/inch of bit diameter)
APPLICATIONS:
MARATHON : For use in less abrasive formations such as shales, limestones, carbonates, most metamorphic formations and most copper bearing formations.
Cutting structures may vary from those shown where RB and DF series bits share the same series number (i.e. RB40/DF40).
RB70/DF70 series
RB80G series
Ridgeback D-Force(Sidewinder)
The Ridgeback MarathonTM series contains new longer life bearings,
additional gage protection, and improved cutting structure elements
for use in high pull-down applications.
The Ridgeback D-ForceTM series includes many of our Ridgeback MarathonTM features with additional gage protection and a heavy duty Sidewinder leg which is designed for extremely abrasive applications and drilling conditions where difficult hole cleaning, or extreme formations, require maximum shirttail protection.
INSERT BIT PRODUCT LINE
6 1/4
6 3/4
7 3/8
7 7/8
9
9 7/8
10 5/8
11
12 1/4
13 3/4
16
3 1/2
3 1/2
3 1/2
4 1/2
4 1/2
6 5/8
6 5/8
6 5/8
6 5/8
6 5/8
7 BECO
159
171
187
200
229
251
270
280
311
349
406.4
RB30
RB30
RB30
RB30
RB40
RB40
RB40
RB40
RB40
RB40
RB40
RB50
RB50
RB50
RB43
RB50
RB53
RB53
RB53
RB53
RB53
RB53
RB53
RB53
RB60
RB60
RB60
RB60
RB60
RB60
RB60
RB60
RB60•
RB63
RB63
RB80G
RB80G
RB67
RB67
RB67
RB67
RB67
RB70
RB70
RB70
RB70
42
46
58
76
96
145
157
193
225
292
580
19
21
26
35
43
66
72
88
102
134
264
Diameter
Inches mm
Approx Wt
lbs kg
Pin Size
2 31 2 31 2 31
RIDGEBACK MARATHONTM SERIES
SOFT MEDIUM HARD
Inches
6 3/4
7 7/8
9
9 7/8
10 5/8
11
12 1/4
16
3 1/2
4 1/2
4 1/2
6 5/8
6 5/8
6 5/8
6 5/8
7 BECO
159
200
229
251
270
280
311
406.4
DF30
DF30
DF43
DF40
DF40
DF40
DF40
DF43
DF53
DF60
DF60
DF60
DF60
DF60
DF60
DF60
DF63
DF63
DF63
DF67
DF67
DF67
DF67
DF67
DF67*
DF70
42
76
96
145
157
193
225
580
19
35
43
66
72
88
102
264
Pin Size
RIDGEBACK D-FORCETM SERIES
SOFT MEDIUM HARD Diameter
Inches mm
Approx Wt
lbs kg2 31 2 31 2 31 Inches
*With 7" BECO pin
The above product range represents the bits which were available when this catalogue was published. Varel is continually expanding and developing its range of products. For an updated availability list, please contact a Varel sales representative/agent, or consult our
Web site at -WWW.VARELINTL.COM
10
11
2 15/16 - 3
3 7/8
4
4 1/4
4 1/2
4 3/4
4 7/8
5 1/8
5 5/8
5 7/8
6
6 1/4
N Rod
2 3/8
2 3/8
2 3/8
2 3/8
2 7/8
2 7/8
2 7/8
3 1/2
3 1/2
3 1/2
3 1/2
75-76
98
101
108
114
121
123
130
143
149
152
159
M60
8
10
11
12
13
15
16
17
27
28
35
36
3.6
4.5
4.75
5.5
5.8
6.8
7.1
7.7
12.2
12.7
15.9
16.3
Diameter
Inches mm
Approx Wt
lbs kg
Pin Size
2 31 2 31 2 31
TUNGSTEN CARBIDE INDUSTRIAL BITSSOFT MEDIUM HARD
Please note that all QMC series products may be slightly oversize. All DW series products are made strictly to API tolerance standards.
DW7DW9 DWHDW53ET
INDUSTRIAL BIT PRODUCT LINE
MINERAL EXPLORATION BITS
Varel has developed a range of reverse circulation bits with various bear-ing packages. These bits are suitable for soft/medium formation drilling and have: • Opennon-sealedrollerbearings.• Fullysealedcompensatedjournalbearings.
Varel provides a range of products for reverse circulation applications. These bits are developed to provide exceptional performance in a wide variety of formations typically encountered during mineral exploration. The center hole is the maximum diameter possible for superior hole cleaning and cuttings retrieval. All RX and RC bits are precision machined to work with most existing R/C systems.
Products featuring both sealed and open bearings are available. Varel fullysealed bearing products for reverse circulation applications feature fully pressure compensated, non serviceable lubrication supplied to the industry ’s most sophisticated journal bearing. The bearing features hardmetal inlays on all contact surfaces with silver-plated cone bearings, specially formulated seal compounds, and high-temperature lubricant. The bearings and seals are developed for long life.
Open bea r ing p roduc t s f ea tu re p rec i s ion ro l l e r bearings with special thrust elements to prevent axial wear. The cones are retained by ball bearings and the pilot pin features hardmetal inlays against a tool steel bushing.
Regardless of bearing type, the cutting structures on all reverse c i rcu l a t ion p roduc t s a re des igned to p rov ide a combination of fast penetration and durability. These bits consistently provide the lowest cost per foot of drilled hole in mineral exploration applications.
5 1/2” - RC537
5 1/8"
5 1/4"
5 3/8"
5 1/2"
3 7/8"
4 3/4"
4 3/4"
4 3/4"
5"
5 1/8"
5 1/4"
5 3/8"
5 1/2"
5 5/8"
5 3/4"
5 7/8"
6"
6 1/8"
6 1/4"
6 1/2"
6 3/4"
DW53ET
RX53
RX53
RX53
CH24
CH24
CH35
ETD48
RC537
RC537
RC537
RC537
RC537
CH34
CH34
CH34
CH34
CH34
CH34
CH34
V537
MEDIUM
MEDIUM
MEDIUM
MEDIUM
SOFT
SOFT
MEDIUM
HARD
MEDIUM
MEDIUM
MEDIUM
MEDIUM
MEDIUM
MEDIUM
MEDIUM
MEDIUM
MEDIUM
MEDIUM
MEDIUM
MEDIUM
MEDIUM
OPEN
OPEN
OPEN
OPEN
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
SEALED*
Sizeof Bit Type Formation Bearing
BIT AVAILABILITY
12
* Fully sealed bearing with compensator system.
Our availability chart lists the most popular diameters and cutting structures we currently manufacture for reverse circulation applications.
Other cutting structures and diameters
may be available upon request.
2 7/8
2 15/16
3 1/4
3 1/2-3 5/8
3 3/4
3 7/8-4 1/8
4 1/4
4 1/2
4 5/8
4 3/4
5
5 1/8
5 1/2
5 5/8
5 3/4
5 7/8
6
6 1/8
6 1/4
6 1/2
6 3/4
7 7/8
12 1/4
13 3/4
17 1/2
20
22
24
26
28
34
36
N Rod
N Rod
N Rod
2 3/8
2 3/8
2 3/8
2 3/8
2 3/8
2 7/8
2 7/8
2 7/8
2 7/8
2 7/8
3 1/2
3 1/2
3 1/2
3 1/2
3 1/2
3 1/2
3 1/2
3 1/2
4 1/2
6 5/8
6 5/8
6 5/8 or 7 5/8
6 5/8 or 7 5/8
7 5/8
7 5/8
7 5/8 or 8 5/8
7 5/8 or 8 5/8
7 5/8 or 8 5/8
7 5/8 or 8 5/8
73
75
79-82
89-92
95
98-105
108
114
117
121
123-127
130-133
140
143
146
149
152
156
159
165
171
200
311
349
445
508
559
610
660
711
863
914
L121*
L121*
L111*
L111*
L111*
L111*
L111*
L113*
L3A
L3A
V3S0
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
LH1
LH1
LH1
LH1
LH1
LH1
CH12MS
V517
ETD14
V435
CB24
V537
ETD24
CB24
ETD24
V515
ETD38
L1
L1
L1
V3M0
4
4
4 1/4
9
9
9
10
11
11
16
16
17
17
22
22
22
26
26
29
29
33
62
200
292
450
860
891
1125
1300
1420
2200
2400
1.8
1.8
1.9
4.1
4.1
4.1
4.5
5
5
7.3
7.3
7.7
7.7
10
10
10
11.8
11.8
13.2
13.2
15
28
91
133
204
391
404
510
589
645
1000
1100
Diameter
Inches mm
Approx Wt
lbs kg
Pin Size Sealed Bearing TCI
2 31 2 31 2 31
STEEL TOOTH BIT PRODUCT LINE
Soft Med M/Hrd
SOFT MEDIUM HARD
* JET BITS
The above chart represents commonly available sizes and types. Varel International does produce other sizes and types of rock bits which do not appear on this list. Please consult your local representative or visit our Web site. WWW.VARELINTL.COM
If you have custom requirements for a specific application, please contact your local sales representative/agent.
13
COMPRESSIVE STRENGTHS: 500 to 3,000 (psi) DRILLING SPEEDS: 60 to 150 rpm JET CIRCULATION: all sizes DRILLING WEIGHTS: 2,000 to 5,000 (lbs/inch of bit diameter) GAGE TYPES: “A” Tooth
FORMATIONS: Soft limestones, soft clays, red beds, soft shales, shells and other formations with relatively low compressive strengths.
FEATURES: Long, slim, widely spaced teeth. All teeth are hard faced. Skewed cone action for high penetration rates.
L111
COMPRESSIVE STRENGTHS: 1,000 to 5,000 (psi) DRILLING SPEEDS: 50 to 100 rpm JET CIRCULATION: 5 1/8” and larger DRILLING WEIGHTS: 2,000 to 5,000 (lbs/inch of bit diameter) GAGE TYPES: “A” Tooth
V3MO
L111
COMPRESSIVE STRENGTHS: 500 to 3,500 (psi) DRILLING SPEEDS: 60 to 150 rpm JET CIRCULATION: all sizes DRILLING WEIGHTS: 2,000 to 5,500 (lbs/inch of bit diameter) GAGE TYPES: “A” Tooth
FORMATIONS: Soft limestones, soft clays, red beds, soft shales, shells and other formations with relatively low compressive strengths.
FEATURES: Long, slim, widely spaced teeth with additional hard facing. Skewed cone action for high penetration rates.
V3M0
L121
FORMATIONS: Engineered for rugged drilling in a wide variety of formations.
FEATURES: All teeth are hard faced with extra heavy deposits of tungsten car-bide for long life. Additional gage hard metal assures more protection for the shirttails. Spacing and angle of teeth allow for durability and long life.
14
Varel’s soft formation steel tooth bits have long aggressive forged teeth with maximum offset to give high penetration rates.
SOFT FORMATION STEEL TOOTH BITS
L121
COMPRESSIVE STRENGTHS: 4,000 to 10,000 (psi) DRILLING SPEEDS: 35 to 85 rpm ALL REGULAR CIRCULATION: 2 7/8” and larger DRILLING WEIGHTS: 3,000 to 6,000 (lbs/inch of bit diameter) GAGE TYPES; “A” Tooth
FORMATIONS: Wide range of medium formations such as altered limestones, shales, anhydrite and other formations with medium compressive strengths.
FEATURES: Moderately skewed cone design. Teeth hard-faced on one flank to resist abrasion. Vented “A” type gage gives high rates of penetration.
L2
COMPRESSIVE STRENGTHS: 9,000 - 20,000 (psi) DRILLING SPEEDS: 30 to 65 rpm REGULAR CIRCULATION: All sizes DRILLING WEIGHTS: 3,500 to 7,000 (lbs/inch of bit diameter) GAGE TYPES: Double ‘T’
LH1
L2
COMPRESSIVE STRENGTHS: 8,000 - 18,000 (psi) DRILLING SPEEDS: 35 to 75 rpm REGULAR CIRCULATION: All sizes DRILLING WEIGHTS: 3,500 to 6,500 (lbs/inch of bit diameter) GAGE TYPES: ‘A’ Tooth
FORMATIONS: Specifically designed for fast penetration in formations that are hard, but not particularly abrasive.
FEATURES: Designed to conform to latest drilling techniques requiring heavier weights. Similar in design to the LH1, but does not have webbed heel row.
L1
L1
15
Medium series bits have “A” or “T” teeth for wear resistance. Hard formation bits have “L” or “T” shaped heel row teeth for hard formations,
double “T” heel row teeth for hard and abrasive formations.
MEDIUM & HARD FORMATION STEEL TOOTH BITS
LH1
FORMATIONS: Hard formations such as pyrite, chert,dolomites, granite porphyry and other formations which have high compressive strengths and are abrasive.
FEATURES: Closely spaced, strong short teeth for maximum crushing and chipping.
Whether you are using air, water, foam or mud for circulation purposes, Varel has a full range of bits suitable for your needs.
RegularCenterFluidCirculationVarel regular circulation bits provide efficient circulation of fluid through the center of the bit to clean the teeth and the bottom of the hole. Available in full opening or three drilled hole courses.
Regular Air CirculationVarel air blast circulation bits provide a balanced supply of air to the bearings for cooling. A balanced supply of air also is directed to clean the cutters and the bottom of the hole. Back flow valve is available with this design.
JetCirculationFluidorAirVarel jet circulation bits are engineered for use with high pressure fluid or air. The precision nozzles direct the velocity of the fluid or air at the bottom of the hole for efficient cleaning.
ForgedTeeth,uniquetoVarelVarel pioneered the research and development of forged teeth for steel tooth rotary cone bits. This technique, illustrated in the chemically etched section above, is a recognized advance in metallurgical design, resulting in stronger, uniformly compressed and unbroken flow lines in bit teeth.
These stronger teeth produce longer bit life and faster penetration.
OptionalFeatures
1. Jet Circulation: Specify air or fluid circulation.
2. Regular (center) Circulation: Specify fluid or air circulation and,
full hole or orifice plate.
3. Reverse Circulation: Precision machined to customer specifications.
4. BECO Pin thread connection.
16
FEATURES
17
SEALED BEARING PILOT HOLE BITS
Premium Sealed Bearing Pilot Hole Bits
Varel International’s oilfield and mining experience provides a selection of sealed bearing journal bits designed for drilling the most demanding raise bore pilot holes, blind bore pilot holes, and underground drill and blast holes.
Each bit is designed with a premium sealed bearing system including a pressure compensator. The premium bearing package features advanced metallurgy with frictional elements silver-plated to reduce frictional heat generation and provide resistance to galling under high loads. O-ring seals made from a proprietary HSN elastomer provide extremely long seal life.
The PH80 series features blunt dome-shaped inserts to provide a durable cutting structure for maximum crushing and chipping action while minimizing wear. Varel’s PH60 bits utilize conical and/or chisel shaped inserts for increased penetration rates in softer formations. Extra hardmetal and carbide inserts are installed in the surface of the shirttail to provide superior seal protection.
15"
13 3/4"
12 1/4"
11"
9"
PHR80*
PH80
PHR80* - PH80
PH60 - PH80
PH80
Bit Sizes Bit Type
CURRENTPILOT BIT
AVAILABILITY
12 1/4” - PH80
* Sealed roller bearing bit for Boxhole applications.
All Varel premium pilot bits incorporate specially formulated highly saturated nitrile elastomers and high temperature lubricants.
(New diameters and models are under development. Please consult your nearest representative.)
feet
metres
inches
millimeters
pounds
decanewtons
tonne
pounds
kilograms
32nds
millimeters
barrels
cubic meters
U.S. gallons
cubic meters
U.S. gallons
liters
barrels/min
gallons/min
gallons/min
liters/min
feet/min
meters/min
psi
kilopascals
psi
megapascals
psi
atm
psi
bars
psi
kilogram/sq cm
pound/gallon
kilogram/cubic meter
pound/gallon
specific gravity
pound/gallon
psi/100 ft
foot pound
newton meters
square inches
square millimeters
DEPTH
WEIGHT ON BIT
NOZZLE SIZE
VOLUME
CIRCULATION RATE
ANNULAR VELOCITY
PRESSURE
MUD WEIGHT (density)
TORQUE
AREA
meters
feet
millimeters
inches
decanewtons
tonne (metric)
pounds
kilograms
pounds
millimeters
32nds
cubic meters
barrels
cubic meters
U.S. gallons
liters
U.S. gallons
gallons/min
barrels/min
liters/min
gallons/min
meters/min
feet/min
kilopascals
psi
megapscals
psi
atm
psi
bars
psi
kilogram/sq cm
psi
kilogram/cubic meter
pound/gallon
specific gravity
pound gallon
psi/1000 ft
pound gallon
newton meters
foot pound
square millimeters
square inches
0.3048
3.2808
25.4
0.0394
0.4448
2.2481
0.0004536
0.4536
2.205
0.7938
1.2598
0.1590
6.290
0.003785
264.2
3.7854
0.2642
42
0.02381
3.7854
0.2642
0.3048
3.2808
6.8947
0.14504
0.006895
145.038
0.06804
14.696
0.06895
14.5038
0.07031
14.2233
119.829
0.008345
0.119829
8.3452
51.948
0.01923
1.3558
0.7376
645.16
0.00155
CONVERSION TABLE
TO CONVERT INTO MULTIPLY BY
18
40
43
50
53
60
63
67
70
80
30SOFT
MEDIUM
HARD
2500PSI 75005000 10000 12500 15000 17500 20000 22500 25000 27500 30000 32500 35000 37500 40000 42500 45000 47500 50000 52500 55000 57500 60000 62500 65000 67500 70000
17.2MPA 51.734.5 69.0 86.2 103.4 120.7 137.9 155.1 172.4 189.6 206.8 224.1 241.3 258.6 275.8 293.0 310.3 327.5 344.7 362.0 379.2 396.5 413.7 430.9 448.2 465.4 482.6
2.5PTO 64 7 8 10 11 12 13 14 15 16 17 18 18 19 20 21 22 23 23 24
Varel Ridgeback MarathonTM
Ridgeback D-ForceTM Series Insert Bits
SAN
DST
ON
E (S
OFT
)
SCH
IST
(SO
FT)
FORM
ATIO
N
LIM
ESTO
NE
(HA
RD)
LIM
ESTO
NE
(SO
FT)
SAN
DST
ON
E (H
ARD
)
CON
GLO
MER
ATE
BASA
LT (H
ARD
)
DIO
RITE
SLAT
E
QU
ART
ZITE
(S
OFT
)
GN
EISS
(A
VER
AG
E)
GA
BBRO
GRA
NIT
E
DIA
BASE
(D
OLE
RITE
)
QU
ART
ZITE
(H
ARD
)
AM
PHIB
OLI
TE
VAREL INSERT BIT COMPARISON AND HARDNESS TABLE
REPRESENTATIVE ROCK COMPRESSIVE STRENGTH in psi / mpa / protodjakonov scales
V3MO
L2
L1
LH1
L111
Varel Steel Tooth
Bits
VAREL STEEL TOOTH BIT COMPARISON AND HARDNESS TABLE
REPRESENTATIVE ROCK COMPRESSIVE STRENGTH in psi / mpa / protodjakonov scales
1000PSI 30002000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 15000 16000 17000 18000 19000
6.9MPA 20.713.8 27.6 34.5 41.4 48.3 55.2 62.1 69.0 75.8 82.7 89.6 96.5 103.4 110.3 117.2 124.1 131.0
1PTO 32 4 6 6 7 8 9 9 10 10 11 11 12
CON
GLO
MER
ATE
SCH
IST
(SO
FT)
TUFF
SAN
DST
ON
E (S
OFT
)
LIM
ESTO
NE
(SO
FT)
LIM
ESTO
NE
(HA
RD)
SAN
DST
ON
E (H
ARD
)
BASA
LT (S
OFT
)
SHA
LE (S
OFT
)
DO
LOM
ITE
AN
DES
ITE
MA
RBLE
SCH
IST
(HA
RD)
DIO
RITE
FORM
ATIO
N
SOFT
MEDIUM
HARD
CHARTS FOR MAXIMUM BIT LIFE
19
20
USEFUL OPERATIONAL DATA
Unique feature at Varel International are vented cones.Bits with vented cones have significantly more airflow through the bearings than standard bits. The nozzle size should be reduced in order to maintain suitable back pressure for proper cooling and cleaning. This chart gives the proper nozzle sizes to use with bits with vented cones.
Total Drilling Cost
TDC = B + R FP
TDC = Total drilling cost per foot or meter drilled
B = Total bit price
R = Operating cost per hour for the drill rig expressed in dollars per hour
F = Total life of the rock bit expressed in either feet or meters
P = Penetration rate of the rock bit expressed as feet or meters per hour
Tips for optimizing drill bit performance
1/2"
9/16"
5/8"
11/16"
3/4"
13/16"
7/8"
15/16"
1"
7/16"
1/2"
9/16"
5/8"
3/4"
13/16"
7/8"
15/16"
1"
7/16"
1/2"
9/16"
5/8"
11/16"
3/4"
13/16"
7/8"
15/16"
Non-ventednozzle size
(one)
Nozzle size for vented cones (one)
Bit size 9"
Bit size9 7/8" - 13 3/4"
Nozzle Size Adjustment For Vented Cones
1. Keep rotating the bit, and turn on the air before the bit touches the ground, and keep the air on until the bit is out of the hole. If the bit is to stay in the hole while adding drill steel, blow the hole clean for 60 seconds prior to turning off the air.
2. When purchasing a new drill specify compressors with adequate capacity. Don’t forget the altitude factor when sizing the compressor. Often 7,000 to 10,000 linear feet per minute in return air velocity is required to properly clean the hole, particularly with heavier or larger cuttings.
3. Inspect the rock bit after each hole and record the condition of the rock bit at regular intervals.4. Hot cones may indicate obstruction of the air passage to the bearings.5. Pressure gage increases may indicate air passages are plugging.6. An increase in air pressure may indicate unwanted restrictions in the air system. A decrease in air pressure may indicate leakage in the air system. 7. Accidental dropping of the bit and drill string can damage bearings and/or cones. 8. The I.D. (inside diameter) of the pin and box connections of the drill string should be the same as or larger than the I.D. of the pin on the rock bit. This will reduce the pressure drop loss across the drill string to the lowest possible psi.9. Avoid early bit failures by refraining from using bent drill steel and excessively worn drill steel, stabilizers, deck bushings or shock subs. 10. When making up the rock bit use slow rotation and ensure that the drill string and rock bit mate properly shoulder to shoulder. Monitor the process carefully in order to avoid cross threading.11. Use proper tool joint lubrication to maintain connections.12. Use only the minimum amount of water required to suppress the dust.13. Use the factory recommended weight and rotation speeds to accommodate the formations being drilled.14. Rotary speed should be decreased as down pressure is increased and down pressure decreased as rotary speed is increased.15. Accurate information is valuable knowledge. Always record footage drilled, time in the hole, rpm, weight on bit, psi, formation drilled and any unusual drilling conditions. (Water in the hole, broken formations, etc.) 16. Form drilling process improvement teams with your key suppliers. Establish improvement goals and measure progress.
1/4
9/32
5/16
11/32
3/8
13/32
7/16
15/32
1/2
17/32
9/16
5/8
11/16
3/4
7/8
1
1 1/8
1 1/4
6.35
7.14
7.93
8.73
9.52
10.31
11.11
11.90
12.70
13.49
14.28
15.87
17.46
19.05
22.22
25.40
28.57
31.75
.049
.062
.076
.093
.110
.130
.150
.172
.196
.222
.248
.306
.372
.442
.601
.785
.993
1.228
31.62
40.00
49.04
60.00
70.97
83.88
96.78
110.97
126.46
143.23
160.01
197.43
240.01
285.18
387.77
506.48
640.68
792.31
.147
.186
.228
.279
.330
.390
.450
.516
.588
.666
.745
.918
1.116
1.326
1.803
2.355
2.985
3.684
94.84
120.01
147.11
180.01
219.92
251.63
290.34
332.92
379.38
429.70
480.67
592.29
720.04
855.54
1163.30
1519.45
1925.92
2376.92
in.
Hole Size Area/1 Hole Area/3 Holes
mm Sq. in. mm2 mm2Sq. in.
Nozzle Hole Area Chart
USEFUL OPERATIONAL DATA
in. mm in. mm in. mm 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2600 2800 3000
1/25/83/47/81
3/47/81
1 1/85/83/47/81
1 1/8
3/47/81
1 1/81 3/81 1/2
2
5 3/8to
6 3/4
7 3/8to
7 7/8
9to
9 7/8
10 5/8to
17 1/2
137
171
187
200
229
251
270
445
12.7015.8719.0522.2225.4019.0522.2225.4028.5715.8719.0522.2225.4028.57
19.0522.2225.4028.5734.9238.1050.80
7.939.5211.1112.7014.2811.1112.7014.2815.879.5211.1112.7014.2815.8719.0511.1112.7014.2815.8719.0522.2228.57
453630262124
2922
55463732263124
393024
6554443632383023
49383023
22
5/163/8
7/161/2
9/167/161/2
9/165/83/8
7/161/2
9/165/83/4
7/161/2
9/165/83/47/8
1 1/8
7564514437453629245745362922
2821
8472605144524235296553423528
332622
816857505848403473614841352238302622
7664546654463980685646392544363025
82705972625244
756352442949413428
766578705850
82695749345546373022
827084796455
74625239615041342520
76
877060
80675643665545372822
82
7665
716146725949413124
8371
766550786353453426
76
816953
6858493728
82
7357
7362524030
7760
7866564331
8164
70604533
67
7564483620
71
67513822
74
71544028
78
75574330
82
604530
644732
685034
FullAir
CourseDiameter
Bit SizeRange
JetNozzle
Diameter3 Each
Air Pressure Drop (pounds per square inch) Bits with various air course diameters or jet nozzle sizes
Air Volume DeliveredCubic Feet Per Minute
BIT AIR PRESSURE DROP CHART
For the most effective hole cleaning a minimum bailing velocity of 6000 feet per minute is considered desirable. This volume is calculated for the most common bit and pipe sizes. For dense materials, this volume should be increased
in order to yield optimum cleaning efficiency.
The simple formula Q=AV can be applied to determine the volume flow of air (Q) necessary to give the desired velocity (V). (A) is the area of the hole through which the cuttings-laden air flows. This area is the area of the hole less the area filled by the drill
pipe.
In addition to adequate return air velocities, the pressure drop across the bit must be controlled to obtain the optimum bearing life. Pressure drop across the bit should be maintained in excess of 30 psi. Two (2) to ten (10) psi should be added for losses in the system
ahead of the bit. For optimum bit life nozzles should be selected to hold pressure near the maximum allowable on the compressor.
Helpful Hole Cleaning Information
Bailing velocity
BV = 183.3xACFM D2 _ d2
BV = Bailing velocity(feet per minute)ACFM = Actual cubic feet of free air per minute delivered183.3 = Factor for conversionD = Diameter of the hole being drilled. (inches)d = Outside diameter of the drill pipe being utilized. (inches)
21
MEXICOVAREL DE MEXICO, S.A DE C.V.3a. Y Michoacan #310 SurFraccionamiento Moderno, H. MatamorosTamaulipas, MexicoC.P. 87380Phone: +52-868-8170467Fax: +52-868-8172106Email: [email protected]
S A L E S O F F I C E S W O R L D W I D E :
7146
- 0
8200
8
Visit us at WWW.VARELINTL.COM
VARELINTERNATIONALCORPORATEHEADQUARTERS1434 Patton, Suite 106, Carrollton, Texas 75007Mailing address:P.O. Box 540157, Dallas, Texas 75354-0157Phone: +1-972-242-1160Fax: +1-972-242-8770Email: [email protected]: 1-800-VARELCO (827-3526)
SOUTHAMERICA VAREL INTERNATIONAL Ind. L.P. Sucursal del Peru Las Poncianas 105/107, La Molina Vieja Lima 12, Peru Phones: +51-1-365-2529 / 365-5178Fax: +51-1-365-8305 Cellular: +51-1-9999-60283/+51-1-994565587 RPM # 297165Email: [email protected] Email: [email protected]
ASIA-PACIFICVAREL INTERNATIONAL (Australia Pty Ltd)Riseley Corporate Centre Suite 31, 135, Riseley Street Booragoon, WA 6154Australia.Phone: +61-8-9315-9999Fax: +61-8-9315-9800 Email: [email protected]
C E R T I F I E D