varel mining catalog

8/10/2019 Varel Mining Catalog

1/24Proud to be a Miner

INNOVATION HAS NO LIMITS

RIDGEBACKMARATHON

RIDGEBACKD-FORCE


2/24

A Brief

Int roduct ion

Ridgeback Marathon TM and

Ridgeback D-Force TM Compar ison

Innovat ion, Evolut ion,Features and Benef i ts

Blast Hole Bi ts

Tungsten Carbide

Indust r ia l Bi ts

Mineral

Explorat ion Bi ts

Steel Tooth Product Range

Pi lot Bi ts

Addi t ional Useful Data

1-2

3

4-5

6-10

11

12

13-16

17

18-21

TA BL E O F CO NT EN TS

C E R T I F I E D


3/24

Varel International is focused exclusivelyon producing world class drilling bits.

We are committed to introducing drill bit innovation inpartnership with our customers.

We are a dedicated specialist drill bit manufacturerwith more than 50 years experience.

Mission StatementWe 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 StatementWe will be recognized as a leading global drill bit company

V alue our employees for their dedication and innovation.

A re accountable to our stakeholders.

R eliably provide products and service.

E thically interact with our customers, competitors, vendors and community.

L ead in generating value for our customers.

DEDICATED TO DRILL BITS


4/24

Developmentof 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 ofthe patented Ridgeback series,

the introduction of the new Ridgeback Marathon TM and Ridgeback D-Force TM Series

combines many of the existingfield-proven features, plus anew high load SP1 bearing

package, reinforced gage and shirttail protection features.

These Ridgeback D-Force TM

features have been

introduced to increase performance in highly

abrasive conditions.

The introduction of the patented Varel Ridgeback series produced the

first generation of advancedtechnology features designed for

longer life bearings, improved

cutting structures, and the famousRidgeback shirttail concept.

All of these features greatlyassists hole cleaning resulting

in extended bit life.

2000

2008

2


5/24

Backed by years of field-proven technology and expertise, Varel has bthe leading provider of high performance drill bits.Our technological advances embrace the use of highly sophisticated ctechnology, premium raw materials and thousands of "on the job man

all aimed at reducing our customers cost of drilling.

M a r a t h o n TM & D - F o r c e TM

- f e a t u r e c o m p a r i s o n

Ridgeback TM

Marathon Blas t Hole

RidgebackD-Force TM Blas t Hole

HET carbidetreatment

Vented cones

Tough & wearresistantcutt ing structure

New SP1 advancedbearing design

Ridgeback

Ridgeback MarathonTM productscontain new longer life bearings,additional gage protection, and improved cutting structureelements for use in high pull-downapplications.

Ridgeback D-ForceTM productscontain new longer life bearings,

heavy duty shirttails, and improved abrasion resitant tungsten carbide

inserts for use in extremely abrasiveapplications.

Toughercarbide grades

HET carbidet reatment

Vented cones

Increasedhole wall

clearance

New abrasion

resistantcarbide grades

New SP1 advancedbearing design

Sidewindersh i r t ta i l /gage

protect ion


6/244

INTRODUCINGRIDGEBACK MARATHON TM

AND RIDGEBACKD-FORCE TM SERIES

Varel International is continually improving itsseries of three cone drill bits designed for theblasthole industry.

The Ridgeback MarathonTM and Ridgeback D-ForceTM

series, incorporate the most advanced featuresavailable today in air circulation rock bits.

New advances in computer technology have

allowed Varel to develop proprietary rock bitdesign software that enables design changes tobe introduced rapidly. This exclusive software aidsthe engineer with bit design analysis and includessuch factors as drill operating parameters,bit geometry and mine lithology.

By using this software, Varels engineers are ableto predict the effects of design modifications andlimit the risks associated with new product

development.

RIDGEBACKDESIGNTECHNOLOGY

CarbideShirttail Protection

Main RollerBearing

Ball Bearing

PilotBearing

AirPassageways

Air Vent Holes

High Energy Tumb

Thrust Faces

ThrustButton

I N N O VAT I O N A N DE V O L U T I O N


7/24

Enhanced CutterDesign The RidgebackMarathon TM and RidgebackD-ForceTM design process providesthe highest penetration ratesand longest life available.

Maximum GageProtection SRT (Semi RoundTop) tungsten carbide and welded

hardmetal provide superior wearresistance to the shirttail area.This Sidewinder feature isparticularly effective inunstable/fractured formationsand also during collaring.

Vented ConesVented cones are standard in all Ridgeback MarathonTM andRidgeback D-ForceTM series bits9 and larger in diameter.Vented cones allow a continuousair flow throughout the bearingsto provide better cooling andcleaning.

See page 20 for recommendednozzle sizes when using bitswith vented cones.

Longer bearing life

Increased penetration

Added gage penetration

Reduced heat generation

Larger cuttings

Less dust

I n n o v a t i o nA d v a n t a g e s

Advanced BearingDesignAll Ridgeback MarathonTM andRidgeback D-ForceTM rock bitsincorporate bearings designed tominimize heating. The wearelements feature advancedmaterials to give the maximumbearing life under a widevariety of operating conditions.

Improved ThrustCapacityBearing thrust capacity is oftenthe limiting factor in bearing life.Ridgeback MarathonTM bits featurean improved thrust face designwhich minimizes outward thrustwear to prolong bearing life.

High Energy Tumbling TMPrecision manufactured inserts arefurther processed for maximum toughness.Varels HETTM- High Energy TumblingTM process(patented) - gives the inserts a unique surfacetoughness that extends bit life.

S E R I E S F E A T U R E S A N D

B E N E F I T S

R I D G E B A C K

M A R AT H O N

R I D G E B A C K

D - F O R C E

Back Flow ValvesBFVs are available for wetconditions on bothRidgeback MarathonTM andRidgeback D-ForceTM models.


8/24

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 asshales, limestones, carbonates, most metamorphicformations and most copper bearing formations.

D-FORCE :For use in more abrasive formationscontaining sand, silica, quartz, most ignious formations andgold bearing formations.

RB30/DF30 series

All soft formation bits are designed with aggressive cutterprofiles to provide extremely high penetration rates.

S O F T F O R M AT I O N I N S E RT B I T S








RB40/DF40 series






APPLICATIONS:


DF43 series

Cutting structures may vary from those shown where RB and DF series bits share the same series number (i.e. RB40/D

R i d g e b a c k D - F o r c e( S i d e w i n d e r )

The Ridgeback Marathon TM seriescontains new longer life bearings,

additional gage protection, andimproved cutting structure elements

for use in high pull-downapplications .

The Ridgeback D-Force TM seriesincludes many of our RidgebackMarathon TM features with additionalgage protection and a heavy dutySidewinder leg which is designedfor extremely abrasiveapplications and drilling conditionswhere difficult hole cleaning, orextreme formations, requiremaximum shirttail protection.


9/24






Medium formation bits are most commonly used in the mining industry,and provide long bearing life with additional insert strength for consolidated formations.

M E D I U M F O R M AT I O N I N S E RT B I T S

STRENGTHS: 10,000 - 30,000 (psi)





APPLICATIONS:

MARATHON :For use in less abrasive formations such asshales, limestones, carbonates, most metamorphicformations and most copper bearing formations.







D-FORCE :For use in more abrasive formationscontaining sand, silica, quartz, most ignious formations mogold bearing formations.



Cutting structures may vary from those shown where RB and DF series bits share the same series number (i.e. RB40/

RB50 series

RB53/DF53 series

RB60/DF60 series





The Ridgeback D-Force seriesincludes many of our RidgebackMarathon features with additionalgage protection and a heavy dutySidewinder leg which is designedfor extremely abrasiveapplications and drilling conditionswhere difficult hole cleaning, orextreme formations, requiremaximum shirttail protection.


10/24






8

APPLICATIONS:


RB63/DF63 series

All medium hard formation bits are designed with aggressivecutter profiles to provide extremely high penetration rates

when higher pulldown is needed.

M E D I U M H A R D

F O R M AT I O N

I N S E RT B I T S








RB67/DF67 series








11/24

All hard formation bits are designed with tough lowextension cutter profiles to provide maximum durability

in hard formations.

H A R D / V E RY H A R D

F O R M AT I O N

I N S E RT B I T S

STRENGTHS: 35,000 - 60,000 (psi)







COMPRESSIVE STRENGTHS: 50,000 (psi) and Higher





APPLICATIONS:



RB70/DF70 series

RB80G series







12/24

I N S E R T B I T P R O D U C T L I N E

6 1/4

6 3/4

7 3/8

7 7/8

8 1/2

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

4 1/2

6 5/8

6 5/8

6 5/8

6 5/8

6 5/8

7 BECO

159

171

187

200

216

229

251

270

280

311

349

406.4

RB30

RB30

RB30

RB40

RB40

RB40

RB40

RB40RB40

RB40

RB50

RB50

RB43

RB43

RB43

RB50

RB50

RB50

RB53

RB53

RB53

RB53RB53

RB53

RB53

RB53

RB60

RB60

RB60

RB60RB60

RB60

RB60

RB60

RB60*

RB63

RB63RB63

RB63

RB80G

RB80G

RB67

RB67RB67

RB67

RB67

RB67

RB70

RB70

42

46

58

76

83

96

145

157

193

225

292

580

19

21

26

35

38

43

66

72

88

102

134

264

DiameterInches mm

Approx Wtlbs kg

Pin Size2 3 4 51 2 31 2 31

RIDGEBACK TM PRODUCT LINE

SOFT > MEDIUM MEDIUM > HARD HARD > VERY 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

DF20 DF30

DF30

DF30

DF40

DF40

DF40

DF43

DF43

DF43

DF53

DF57

DF60

DF60

DF60

DF60

DF60

DF60

DF60

DF63

DF63

DF63

DF63

DF63

DF67

DF67

DF67

DF67

DF67*

DF70

DF70

DF70

42

76

96

145

157

193

225

580

19

35

43

66

72

88

102

264

Pin Size

D-FORCE TM PRODUCT LINE

SOFT > MDIUM MEDIUM > HARD HARD > VERY HARD Diameter

Inches mm

Approx Wt

lbs kg2 5431 2 31 2 31 Inches

*With 7" BECO pin

The above product range represents the bits which were available whenthis catalogue was published. Varel is continually expanding anddeveloping 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

0


13/24

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

DW531

DW9

QMC9

DW9

DW9

DW9

DW7

DW7

DW7

DW7 QMC7

QMC7

DW7 QMC7

DW7 QMC7

DW7

DW7

QMC7

DWH

DWH

DW532

DW53ET

QMC53ET

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

DiameterInches mm

Approx Wtlbs kg

Pin Size2 31 2 31 2 31

TUNGSTEN CARBIDE INDUSTRIAL BITS

SOFT 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

I N D U S T R I A L B I T P R O D U C T L I N E


14/24

M I N E R A L E X P L O R A T I O N B I T S

Varel has developed a range of reverse circulation bits with various bearingpackages. These bits are suitable for soft/medium formation drilling andhave: Open non-sealed roller bearings. Fully sealed compensated journal bearings.

Varel provides a range of products for reverse circulation applications. These bitsare developed to provide exceptional performance in a wide variety of formationstypically encountered during mineral exploration. The center hole is the maximumdiameter possible for superior hole cleaning and cuttings retrieval. All RX and RCbits are precision machined to work with most existing R/C systems.

Products featuring both sealed and open bearings are availabl e. Varel ful lys eal edbea ring p roducts for reverse circulation applications feature fully pressurecompensated, non serv iceab le lubrication supplied to the industrys most

sophisticated journal bearing. The bearing features hardmetal inlays on all contactsurfaces with silver-plated cone bearings, specially formulated seal compounds, andhigh-temperature lubricant. The bearings and seals are developed for long life.

Ope n bea ring pro duct s fea tur e pre cis ion rol ler bearings with special thrust elements to prevent axial wear. The cones are retained by ball bearings andthe pilot pin features hardmetal inlays against a tool steel bushing.

Regardless of bearing type, the cutting structures on all reverse circulationpr od uc ts ar e de si gn ed to pr ov id e a combination of fast penetration anddurability. These bits consistently provide the lowest cost per foot of drilled hole inmineral 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

CM34

CM34

CM34

CM34ETD34

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*

BitDiameter Type Formation Bearing

BIT AVAILABILITY

EXPLORATION BITS

2

* Fully sealed bearing with compensatorsystem.

Our availability chart lists the most populardiameters and cutting structures wecurrently manufacture for reversecirculation applications.

Other cutting structures and diametersmay be available upon request.


15/24

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

4 7/8

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 5/8

6 3/4

7 7/8

8 1/2

12 1/4

13 3/4

14 3/4

15

16

17 1/2

20

21-22

23-24

26

27 1/2

28

34

36

38 1/4

44

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

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

3 1/2

4 1/2

4 1/2

6 5/8

6 5/8

7 5/8

7 5/8

7 5/8

7 5/8

7 5/8

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

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

136

140

143

146

149

152

156

159

165

168

171

200

216

311

349

375

381

406

445

508

533

584

660

698

711

863

914

1001

1118

L121*

L121*

L111*

L111*

L111*

L111*

L111*

L111*

L111*

L111*

L111*

L113*

L3A

L3A

L3A

L111A

V3S0

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L2

L211*

LH1

LH1

LH1

LH1

LH1

LH1

LH1

L1

L1

L1

L1

V3M0

4

4

4 1/4

9

9

9

10

11

11

16

16

16

17

17

17

22

22

22

22

26

26

29

29

33

33

62

83

200

292

345

345

390

450

647

860

891

1300

1300

1420

2200

2400

3850

6000

1.8

1.8

1.9

4.1

4.1

4.1

4.5

5

5

7.3

7.3

7.3

8

8

8

10

10

10

10

11.8

11.8

13.2

13.2

15

15

28

38

91

133

157

157

178

204

293

391

404

589

589

645

1000

1100

1746

2722

Diameter

Inches mm

Approx Wt

lbs kg

Pin Size

2 31 2 31 2 31

STEEL TOOTH BIT PRODUCT LINE

SOFT MEDIUM HARD

* JET BITSThe above chart represents commonly available sizes and types. Varel International does produce other sizes andtypes of rock bits which do not appear on this list. Please consult your local representative or visit our Web site.

WWW.VARELINTL.COMIf you have custom requirements for a specific application, please contact your local sales representative/agent.


16/24

COMPRESSIVE STRENGTHS: 500 to 3,000 (psi)DRILLING SPEEDS: 60 to 150 rpmJET CIRCULATION: all sizesDRILLING WEIGHTS: 2,000 to 5,000(lbs/inch of bit diameter)GAGE TYPES: A Tooth

FORMATIONS: Soft limestones, soft clays, red beds, soft shales, shellsand 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 rpmJET CIRCULATION: 5 1/8 and largerDRILLING 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 rpmJET CIRCULATION: all sizesDRILLING WEIGHTS: 2,000 to 5,500(lbs/inch of bit diameter)GAGE TYPES: A Tooth

FORMATIONS: Soft limestones, soft clays, red beds, soft shales, shellsand 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 varietyof 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 theshirttails. Spacing and angle of teeth allow for durability and long life.

4

Varels soft formation steel tooth bits have longaggressive forged teeth with maximum offset to give high penetration rates.

S O F T F O R M AT I O N S T E E L TO O T H B I T S

L121


17/24

COMPRESSIVE STRENGTHS: 4,000 to 10,000 (psi)DRILLING SPEEDS: 35 to 85 rpmALL REGULAR CIRCULATION:2 7/8 and largerDRILLING WEIGHTS: 3,000 to 6,000(lbs/inch of bit diameter)GAGE TYPES; A Tooth

FORMATIONS: Wide range of medium formations such as alteredlimestones, shales, anhydrite and other formations with medium compressivestrengths.FEATURES: Moderately skewed cone design. Teeth hard-faced on oneflank 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 sizesDRILLING 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 rpmREGULAR CIRCULATION: All sizesDRILLING WEIGHTS: 3,500 to 6,500(lbs/inch of bit diameter)GAGE TYPES: A Tooth

FORMATIONS:Specifically designed for fast penetration in formationsthat are hard, but not particularly abrasive.

FEATURES: Designed to conform to latest drilling techniques requiringheavier weights. Similar in design to the LH1, but does not have webbed heel row.

L1

L1

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.

M E D I U M & H A R D

F O R M AT I O N

S T E E L TO O T H B I T S

LH1

FORMATIONS: Hard formations such as pyrite, chert,dolomites,granite porphyry and other formations which have high compressive strengths and areabrasive.FEATURES: Closely spaced, strong short teeth for maximum crushing andchipping.


18/24

Whether you are using air, water, foam or mud forcirculation purposes, Varel has a full range of bitssuitable for your needs.

Regular Center Fluid CirculationVarel regular circulation bits provideefficient circulation of fluid through thecenter of the bit to clean the teeth and thebottom of the hole. Available in fullopening or three drilled hole courses.

Regular Air CirculationVarel air blast circulation bits provide abalanced supply of air to the bearings forcooling. A balanced supply of air also isdirected to clean the cutters and thebottom of the hole. Back flow valve isavailable with this design.

Jet Circulation Fluid or Air Varel jet circulation bits are engineered foruse with high pressure fluid or air. Theprecision nozzles direct the velocity of the fluid or air at the bottom of the holefor efficient cleaning.

Forged Teeth, unique to VarelVarel pioneered the research anddevelopment of forged teeth for steel tooth rotary cone bits. This technique,illustrated in the chemically etchedsection above, is a recognized advancein metallurgical design, resulting instronger, uniformly compressed andunbroken flow lines in bit teeth.These stronger teeth produce longer bitlife and faster penetration.

Optional Features

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.

6

F E AT U R E S


19/24

SEALED BEARING PILOT HOLE BITS

Premium Sealed Bearing Pilot Hole Bits

Varel Internationals oilfield and mining experienceprovides a selection of sealed bearing journal bitsdesigned for drilling the most demanding raise borepilot holes, blind bore pilot holes, and undergrounddrill and blast holes.

Each bit is designed with a premium sealed bearingsystem including a pressure compensator. Thepremium bearing package features advancedmetallurgy with frictional elements silver-plated toreduce frictional heat generation and provideresistance to galling under high loads. O-ring sealsmade from a proprietary HSN elastomer provideextremely long seal life.

The PH80 series features blunt dome-shaped insertsto provide a durable cutting structure for maximumcrushing and chipping action while minimizingwear. Varels PH60 bits utilize conical and/or chisel shaped inserts for increased penetration rates insofter formations. Extra hardmetal and carbideinserts are installed in the surface of the shirttail toprovide 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 speciallyformulated highly saturated nitrile elastomers andhigh temperature lubricants.

(New diameters and models are under development.

Please consult your nearest representative.)


20/24

feet

metres

inchesmillimeters

pounds

decanewtons

tonne

pounds

kilograms

32nds

millimeters

barrels

cubic metersU.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

millimetersinches

decanewtons

tonne (metric)

pounds

kilograms

pounds

millimeters

32nds

cubic meters

barrelscubic 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

25.40.0394

0.4448

2.2481

0.0004536

0.4536

2.205

0.7938

1.2598

0.1590

6.2900.003785

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


21/24

40

43

50

53

60

63

67

70

80

30SOFT

M

EDI

UM

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

VarelRidgeback Marathon TM

Ridgeback D-ForceTM

Series Insert Bits

S A N D S T O N E

( S O F T )

S C H I S T ( S O F T )

F O R M A T I O N

L I M E S T O N E

( H A R D )

L I M E S T O N E

( S O F T )

S A N D S T O N E

( H A R D )

C O N G L O M E R A T E

B A S A L T ( H A R D )

D I O R I T E

S L A T E

Q U A R T Z I T E

( S O F T )

G N E I S S

( A V E R A G E )

G A B B R O

G R A N I T E

D I A B A S E

( D O L E R I T E )

Q U A R T Z I T E

( H A R D )

A M P H I B O L I T E

VAREL INSERT BIT COMPARISON AND HARDNESS TABLE

REPRESENTATIVE ROCK COMPRESSIVE STRENGTH in psi / mpa / protodjakonov scales

V3MO

L2

L1

LH1

L111

VarelSteel Tooth

Bits

VAREL STEEL TOOTH BIT COMPARISON AND HARDNESS TABLE

REPRESENTATIVE ROCK COMPRESSIVE STRENGTH in psi / mpa / protodjakonov scales

1000PSI 30002 00 0 4 00 0 5 00 0 6 00 0 7 00 0 8 00 0 9 00 0 1 0 0 00 110 00 12 00 0 1 30 00 14 00 0 1 50 00 1 60 00 1 70 00 18 00 0 1 90 00

6.9MPA 20.71 3. 8 2 7. 6 3 4. 5 4 1. 4 4 8. 3 5 5. 2 6 2. 1 6 9. 0 7 5. 8 8 2. 7 8 9. 6 9 6. 5 1 03 .4 11 0. 3 1 17 .2 1 24 .1 1 31 .0

1PTO 32 4 6 6 7 8 9 9 10 10 11 11 12

C O N G L O M E R A T E

S C H I S T ( S O F T )

T U F F

S A N D S T O N E

( S O F T )

L I M E S T O N E

( S O F T )

L I M E S T O N E

( H A R D )

S A N D S T O N E

( H A R D )

B A S A L T ( S O F T )

S H A L E ( S O F T )

D O L O M I T E

A N D E S I T E

M A R B L E

S C H I S T ( H A R D )

D I O R I T E

F O R M A T I O N

SOFT

MEDI

UM

HARD

C H A R T S F O R M A X I M U M B I T L I F E


22/240

U S E F U L O P E R AT I O N A L D A TA

Unique feature at Varel Internationalare vented cones.Bits with vented cones have significantly moreairflow through the bearings than standard bits.The nozzle size should be reduced in order tomaintain suitable back pressure for proper coolingand cleaning. This chart gives the proper nozzlesizes to use with bits with vented cones.

Total Drilling CostTDC = B + R

F PTDC = 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 forvented cones (one)

Bit size9"

Bit size9 7/8" - 13 3/4"

Nozzle Size AdjustmentFor Vented Cones

Nozzle Hole Area ChartNozzle Hole Area Chart

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 thehole while adding drill steel, blow the hole clean for 60 seconds prior to turningoff the air.

2. When purchasing a new drill specify compressors with adequate capacity. Dontforget the altitude factor when sizing the compressor. Often 7,000 to 10,000linear 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 atregular 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 excessivelyworn drill steel, stabilizers, deck bushings or shock subs.

10. When making up the rock bit use slow rotation and ensure that the drill stringand rock bit mate properly shoulder to shoulder. Monitor the process carefully inorder 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 downpressure 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 drillingconditions. (Water in the hole, broken formations, etc.)

16. Form drilling process improvement teams with your key suppliers. Establishimprovement 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. mm 2 mm2Sq. in.

Nozzle Hole Area Chart


23/24

U S E F U L O P E R AT I O N A L D A TA

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

1/2

5/8

3/4

7/8

1

3/4

7/8

1

1 1/8

5/8

3/47/8

1

1 1/8

3/4

7/8

1

1 1/8

1 3/8

1 1/2

2

5 3/8

to

6 3/4

7 3/8

to

7 7/8

9

to

9 7/8

10 5/8

to

17 1/2

137

171

187

200

229

251

270

445

12.70

15.87

19.05

22.22

25.40

19.05

22.22

25.40

28.57

15.87

19.0522.22

25.40

28.57

19.05

22.22

25.40

28.57

34.92

38.10

50.80

7.93

9.52

11.11

12.70

14.28

11.11

12.70

14.28

15.87

9.52

11.1112.70

14.28

15.87

19.05

11.11

12.70

14.28

15.87

19.05

22.22

28.57

45

36

30

26

21

24

29

22

55

46

37

32

26

31

24

39

3024

65

54

44

36

32

38

30

23

49

3830

23

22

5/16

3/8

7/16

1/2

9/16

7/16

1/2

9/16

5/8

3/8

7/161/2

9/16

5/8

3/4

7/16

1/2

9/16

5/8

3/4

7/8

1 1/8

75

64

51

44

37

45

36

29

24

57

4536

29

22

28

21

84

72

60

51

44

52

42

35

29

65

5342

35

28

33

26

22

81

68

57

50

58

48

40

34

73

6148

41

35

22

38

30

26

22

76

64

54

66

54

46

39

80

6856

46

39

25

44

36

30

25

82

70

59

72

62

52

44

7563

52

44

29

49

41

34

28

76

65

78

70

58

50

8269

57

49

34

55

46

37

30

22

82

70

84

79

64

55

74

62

52

39

61

50

41

34

25

20

76

87

70

60

80

67

56

43

66

55

45

37

28

22

82

76

65

71

61

46

72

59

49

41

31

24

83

71

76

65

50

78

63

53

45

34

26

76

81

69

53

68

58

49

37

28

82

73

57

73

62

52

40

30

77

60

78

66

56

43

31

81

64

70

60

45

33

67

75

64

48

36

20

71

67

51

38

22

74

71

54

40

28

78

75

57

43

30

82

60

45

30

64

47

32

68

50

34

FullAir

CourseDiameter

Bit SizeRange

JetNozzle

Diameter3 Each

Air Pressure Drop (pounds per square inch) Bits with various air course diameters or jet nozzle sizesAir 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) isthe 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 systemahead 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 = 183.3 x ACFMD2 _ 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)


24/24

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 :

-

0 1 2 0 1 1

VAREL INTERNATIONALCORPORATE HEADQUARTERS1625 West Crosby, Suite 124, Carrollton, Texas 75006

U.S.A.Mailing address:P.O. Box 540157, Dallas, Texas 75354-0157Phone: +1-800-827-3526 / +1-972-242-1160Fax: +1-972-242-8770Email: [email protected]: 1-800-VARELCO (827-3526)

SOUTH AMERICAVAREL INTERNATIONAL Ind. L.P. Sucursal del PeruLas Poncianas 105/107, La Molina ViejaLima 12, PeruPhones: +51-1-365-2529 / 365-5178Fax: +51-1-365-8305Cellular: +51-1-9999-60283-989 164305-989 164302Email: [email protected]: [email protected]

ASIA-PACIFICVAREL INTERNATIONAL (Australia Pty Ltd)Riseley Corporate CentreSuite 31, 135, Riseley StreetBooragoon, WA 6154Australia.Phone: +61-8-9315-9999Fax: +61-8-9315-9800Email: [email protected]

C E R T I F I E D

varel mining catalog

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