8447779800, Low rate Call girls in Kotla Mubarakpur Delhi NCR
2006 2007 varel-fixed_cutterbitscatalog
1.
2. Table of ConTenTs
About Varel International .................................................................. 1
Varel Cutter Technology ................................................................ 2-3
Fixed Cutter Bit Nomenclature ......................................................... 4
Fixed Cutter Features .................................................................... 5-7
TOUGH-DRILL Bits Description .................................................... 8-9
Navigator Bits Description ......................................................... 10-11
VB Series Bits Description......................................................... 12-13
Hole Opening Bits Description................................................... 14-15
Specialty Bits .................................................................................. 16
Fixed Cutter Reference Tables
Nozzle Series 55 .................................................................. 17
Nozzle Series 65 .................................................................. 17
Make-Up Torque ................................................................... 17
Gage Diameter Tolerances .................................................... 17
Diamond Drill Bit and PDC Bit Connection ............................... 17
Nozzle Total Flow Area .......................................................... 18
API Casing Dimensions and Bit Diameters .................................... 19
Drill Collar Weights ......................................................................... 20
API Conversion Tables ................................................................... 21
Sales Office ......................................................................Back Cover
3. V a r e l I n T e r n aT I o n a l a bIT of a suCCess sTory
Performance … reliability … expertise … value … service.
These are the cornerstones of Varel International, the world’s
largest independent manufacturer of premium drill bits for the
global oil and gas industry. Varel offers a comprehensive product
line of roller cone and fixed cutter/polycrystalline diamond
compact (PDC) drill bits that have evolved and improved through
the technological advances and the engineering expertise of its
qualified staff.
Founded in 1947, Varel remained a privately held company
producing roller cone air bits for the mining industry. In 1978,
Varel introduced its first range of sealed bearing products and
was merged through two subsequent acquisitions. The change
in ownership further advanced and improved the company to the
level of success it holds today as a world leader in both the roller
cone and fixed cutter drill bit industry.
The first acquisition brought a new management team that
helped expand Varel and grow its capabilities and product
offerings for both the global oil and gas/mining markets. During
this time, Varel enhanced and expanded its engineering and
manufacturing capabilities, adding fixed cutter bits and focusing
on delivering value to its customers. Additionally, Varel increased
its international presence by adding a significant worldwide sales
and support team.
The TeChnologICal edge
In 2005, Varel was acquired by KRG Capital Partners, a
private equity firm in Denver, providing the additional capital
the company needed to further expand its product offerings,
proprietary technology and services worldwide. Since that time,
Varel has aligned its engineering and manufacturing capabilities
to provide products that consistently deliver reliability and
optimum product performance, thereby lowering customers’ per
foot drilling costs.
Varel is centrally located with headquarters in Carrollton, Texas,
just north of Dallas, where the company manufactures carbide
inserts for its tungsten carbide bits and has an impressive
roller cone manufacturing facility in Matamoros, Mexico.
The company’s state-of-the-art fixed cutter manufacturing
facilities are in Houston and Tarbes, France.
Varel proudly serves as a major drill bit supplier to many majors,
large independents and national oil companies operating in the
international and domestic oil and gas drilling fronts. Innovative,
yet cost-effective drilling solutions for vertical and directional
wells for land and offshore projects is what customers have come
to expect from Varel.
1
4. Varel fIxed CuTTer drIll bIT TeChnology
Value Through Technology
The drilling industry continues to see improvements in fixed cutter
bit development. These gains, are having positive effects on
drilling performance and are also reducing operational costs.
There is still the need to improve rate of
penetration (ROP), durability, and bit
stabilization, especially in harsh drilling
environments. In addition, performance
efficiency in directional drilling programs also
needs improvement. These challenges, if left
unattended, will drive up drilling costs. As our valued customer,
you have clearly stated what you want — PERFORMANCE.
VALUE THROUGH TECHNOLOGY
At Varel, we are fully committed to bringing
you VALUE through TECHNOLOGY.
Our product development processes have been
adapted to ensure technological innovations
in the following disciplines — bit design concepts,
PDC cutter development and hydraulic
performance optimization — as they relate to
specific applications and/or drilling challenges.
Our elaborate R&D efforts have
resulted in the development of the
following product design tools
— GeoScienceTM (formation drillability
analysis), SPOTTM (bit behavior analysis
and performance prediction), and
CFD (hydraulic design optimization).
In addition, we continue to develop
unique PDC cutters for
specific applications.
Varel stands for PERFORMANCE.
And we are committed to bringing you
VALUE through TECHNOLOGY.
2
5. Varel CuTTer TeChnology
Wear Flat Comparison
The picture shows wear flat comparisons between standard
premium cutters and specialized Varel high abrasion resistance
cutters under identical conditions. Wear Flat Comparison
Carbide Interface
High Performance PDC Cutter Geometries (CIG)
Application-specific PDC cutters, which incorporate advanced
carbide interface geometries (CIG™) and materials science
technologies, are used in Varel bits. The carbide interface
geometries are modeled using finite element analysis (FEA) to
minimize damaging residual stresses (axial, hoop and radial).
This process drastically improves the impact resistance of the Standard Premium Cutter
PDC cutters.
Diamond grades are then selected, analyzed and prepared to
maximize abrasion resistance (see chart below).
Carbide Interface
Geometries (CIG)
Varel High Abrasion
Resistance Cutter
Finite Element Analysis (FEA)
Comparision of Abrasion Resistance
Normalized Rock Volume Removed
Varel
High Abrasion
(higher is better)
Cutters
Standard
Premium
Cutters
Normalized Diamond Volume Removed
(due to cutter wear)
Abrasion resistance comparison, at identical test conditions, between standard
premium cutters and specialized Varel high abrasion resistance cutters.
is (FEA)
3
6. f I x e d C u T T e r b I T n o m e n C l aT u r e
Vb616
Indicates that it is a VAREL product PDC bit with oval cutters, lateral jets, 6 blades, 6 nozzles and
16mm cutters
Product Line Type Vn300
Natural diamond bit for medium hard formation
Bit Suffix Feature
Vh813
Bi-center PDC with 8 blades and 13mm cutters
V TD 6 16 NX VrT813o
Navigator point-the-bit with 8 blades and 13mm oval cutters
VTd616gnx
Blade Count TOUGH-DRILL Bit with 6 blades, less than 6 nozzles,
First Digit premium gage, and shock studs
Cutter Size & Shape
First Digit Second Digit
Second Digit Product Line Type Blade Cutter Size Suffix Features
Count & Shape
Standard PDC Bit 3 091 S - Steel Body
RT - Navigator Point the bit 4 13 B - Box connection
RP - Navigator Push the bit 5 16 T - Turbine Sleeve
M - Navigator Steerable Motor 6 19 P - Power cutters (DR no longer exist)
H - Hole Opening Bicenter 7
B - Lateral Jets and Oval Cutters 8 13O 2 G - Premium Gage
CB - Core Bit 9 16O
TD - Tough Drill 10 19O L - Lateral Jets
N - Natural Diamond 11 23O N - Nozzle Pattern less than One Nozzle per Blade
P - TSP 12 H - Nozzle Pattern in Excess of One Nozzle per Blade
* 100
** 300 W - Crown TSP
*** 500 U - Up Drill / Back Ream
X - Shock Studs
Designates Round Cutters
Designates Oval Cutters
* Soft formation design (N and P product line)
** Medium formation design (N and P product line)
*** Hard formation design (N and P product line)
4
7. f I x e d C u T T e r f e aT u r e s
C u T T I n g s T r u C T u r e f e aT u r e s
“p” powerCuTTers
Varel’s high-density “Powercutter” arrangement gives enhanced bit life through
a variety of rock types without sacrificing ROP. The new Powercutter cutting
structure provides extra exposure and cutter density on the critical shoulder
area of the bit. Bits can now achieve maximum rates of penetration through
one rock formation and then continue to penetrate harder sand or limestone
beds without excessive wear or damage e.g. interbedded formations.
“w” Crown Tsp
Thermally Stable Polycrystalline diamond material is
beneficially placed behind PDC cutters to improve bit stability
with a grooving effect. A unique wear pattern is created
increasing PDC cutter indentation as the cutter wears down.
“u” up drIll / baCk ream
When directional drilling hole wall sloughing, keyseating, or
severe dog legs can occur requiring action. The updrill feature
allows hole wall cleaning as you ream the well bore eliminating
problems.
“x” shoCk sTuds
Shock Studs limit drill bit vibration and increase stability. When
drilling conditions cause a vibration, Shock Studs make contact
with the formation to help restore the bit’s normal smooth
cutting action. Smooth cutting action increases cutter life and
overall bit performance.
5
8. f I x e d C u T T e r f e aT u r e s
g a g e f e aT u r e s
“T” TurbIne sleeVe
Turbine sleeves can be customized to specific lengths and diameters to match
each individual requirement. Sleeves are designed so the junk slots match the bit
junk slots eliminating intersections, making the design hydraulically efficient. Gage
protection on the sleeve can also be matched to the customer’s need.
“g” premIum gage
Premium gage protection is designed to insure
that correct hole diameter is maintained. A variety
of gage configurations exists. The premium gage
consists of Thermally Stable Polycrystalline
diamond rounds, Tungsten Carbide bricks and
PDC (Polycrystalline Diamond Compact) cutters.
The number of pre-flat PDC cutters in the gage is
the only option with this feature.
hydraulICs opTIons
“l” laTeral JeT nozzles
Varel bits can use highly angled lateral nozzles located near
the center of the bit in combination with traditional nozzles
to create cross flow hydraulics. This cross flow optimizes
hydraulic energy, cooling and cleaning of the cutters, enhanced
chip removal, efficiently sweeping cuttings away from the bit
face into the annulus. This hydraulic configuration promotes
faster ROP and reduces cutter wear for longer bit life.
6
9. f I x e d C u T T e r f e aT u r e s
o T h e r f e aT u r e s
“s” sTeel body
Steel body drill bit designs are typically used in applications
where open-faced hydraulics and aggressive cutting structures
are required. They can provide for faster penetrating bits than
conventional matrix designs.
“b” box ConneCTIon
Box connections are most commonly used in conjunction with
a turbine sleeve so that crossover subs are not required when
connecting to turbines, RSS and other downhole tools.
hydraulICs opTIons
“n” nozzle paTTern
With the “N” feature, a bit will have less
than one nozzle per blade. The number
of nozzles will be determined by the
application or bit design. Typical nozzle
pattern is one nozzle per blade.
“h” nozzle paTTern
With the “H” feature, a bit will have more
than one nozzle per blade. The number
of nozzles will be determined by the
application or bit design. Typical nozzle
pattern is one nozzle per blade.
7
10. TOUGH-DRILL BITs
Varel’s TOUGH-DRILL™ PDC bits are designed for hard rock
applications. Due to their improved stabilization characteristics,
these bits address the ROP and durability challenges
experienced when drilling hard and/or abrasive formations.
TOUGH-DRILL bits combine advanced cutting structure
layouts, high performance PDC cutters and superior hydraulic
configurations to ensure ROP and durability improvements.
Through their comprehensive engineering and development
process, TOUGH-DRILL bits reduce impact damage, improve
cleaning and cutter cooling efficiencies. The high abrasion
resistant cutters used in TOUGH-DRILL bits drastically
minimize cutter wear. Our performance continues to validate
our claims.
Shown: 8 3/4” VTD616PG
hydraulICs
As part of the product development process, TOUGH-DRILL
bits go through elaborate computational fluid dynamics (CFD)
evaluations. CFD eliminates re-grinding and re-circulation of
drilled cuttings, a common occurrence when drilling hard and
abrasive applications. In addition, possible stagnation zones
are identified and eliminated. This sophisticated process
improves cleaning efficiency, cutter cooling and ROP.
8
11. TOUGH-DRILL A vA I L A B I L I T y :
3 ¼” T o 18 ½” (88.9 m m T o 469.9 m m ) – I n m aT r I x
8 ½” T o 26” (215.9 m m T o 660.4 m m ) – I n s T e e l
adVanCed CuTTIng sTruCTure
TOUGH-DRILL bits are developed using Varel’s proprietary
design software called SPOT™. Using extensive single cutter
tests and full scale bit tests in laboratory and field conditions,
SPOT ensures cutting structure optimization for specific
applications. SPOT models complete bit behavior in different
rock types during a simulated drilling process. This tool also
evaluates cutter wear as a result of friction and heat transfer.
Using appropriate rock geology and mechanical properties,
SPOT also performs sensitivity analysis for various drilling
parameters (WOB and RPM) to evaluate their effects on ROP,
cutter wear, bit vibrations and footage drilled. Using SPOT
improves the ROP and increases the footage drilled of each
TOUGH-DRILL bit.
hIgh performanCe CuTTers
Application-specific PDC cutters incorporating advanced
carbide interface geometries (CIG) and materials
technologies are used in TOUGH-DRILL bits. The carbide
interface geometries are modeled using finite element
analysis (FEA) to minimize damaging residual stresses (axial,
hoop and radial) improving impact resistance and extending
cutter life, resulting in improved bit life. Diamond grades are
then selected, analyzed and prepared to maximize abrasion
resistance (see chart on page 3).
powerCuTTer™ CuTTIng sTruCTure
Varel’s high-density “Powercutter” arrangement gives
enhanced bit life when drilling a variety of rock types without
sacrificing ROP. The new Powercutter cutting structure
provides extra exposure and cutter density on the critical
shoulder area of the bit. Bits can now achieve maximum rates
of penetration through one rock formation and then continue
to penetrate harder sand or limestone beds without excessive
wear or damage e.g. interbedded formations.
9
12. N Av I G AT O R B I T s
Varel’s Navigator bits are engineered specifically for directional
wells. Each bit is custom designed to a specific directional profile
for a given application. Varel believes that the bit is the most
important factor affecting directional drilling success. Therefore,
a bit’s ability to achieve a given well bore objective relies upon
two key design factors: steerability and directional behavior.
Varel’s Navigator bits possess the key design elements affecting
bit steerability and directional behavior helping you achieve your
drilling objectives.
The bit design process for Navigator bits utilizes GeoScience™,
SPOT™ and Computational Fluid Dynamics (CFD). GeoScience
is Varel’s proprietary mechanical rock properties model that
utilizes well logs. Output information from GeoScience is fed into
the design process through SPOT, Varel’s proprietary design
software, allowing bit designers to accurately model bit dynamics.
The CFD program examines the nozzle orientation for optimum
bit and hole bottom cleaning. By taking all these parameters into
account we fine tune the bit design for the application, making it
the most effective solution for your directional application.
o-rIng sTuds
Shown: 6 1/8” MNS65
Additional matrix material in the shape of an o-ring is placed
directly behind specific cutters. This additional material helps
manage the torque generated by modern steerable systems
while maintaining orientation for increased ROP and reduced
sliding time.
aCTIVe gage CuTTers
Push-the-bit systems require active updrIll feaTure
gage designs. Navigator bits are When drilling a directional well, such negative outcomes like hole
designed to shear the formation wall sloughing, keyseating, or severe dog legs can occur. Varel’s
laterally when high side forces are updrill feature allows hole wall cleaning as you ream the well bore
applied by this system. helping eliminate such problems.
10
13. N Av I G AT O R A vA I L A B I L I T y :
6” To 17 ½” (152.4 mm T o 444.5 m m ) – I n m aT r I x
hydraulICs
Navigator bits go through elaborate computational fluid
dynamics (CFD) evaluations to identify and eliminate possible
stagnation zones. During this process, bit and bottom hole
cleaning are optimized to enhance bit performance. Nozzle
orientation is also examined to insure borehole quality for
steerability purposes. This sophisticated process improves
cleaning efficiency, cutter cooling and ROP.
adVanCed CuTTIng sTruCTure
Navigator bits use Varel’s proprietary software called SPOT.
Using extensive single cutter tests and full scale bit tests in
laboratory and field conditions, SPOT ensures cutting structure
optimization for specific applications. SPOT models complete
bit behavior in different rock types during a simulated drilling
process. Additionally, this tool evaluates cutter wear as a result
of friction and heat transfer. Using appropriate rock geology and
mechanical properties, SPOT also performs sensitivity analysis
for various drilling parameters (WOB and RPM) to evaluate
their effects on ROP, cutter wear, bit vibrations and footage
drilled. Using SPOT improves the ROP and increases the
footage drilled of each Navigator bit.
hIgh performanCe CuTTers
Application-specific PDC cutters incorporating advanced
carbide interface geometries (CIG) and materials technologies
are used in TOUGH-DRILL bits. The carbide interface
geometries are modeled using finite element analysis (FEA)
to minimize damaging residual stresses (axial, hoop and
radial) improving impact resistance and extending cutter life,
resulting in improved bit life. Diamond grades are then selected,
analyzed and prepared to maximize abrasion resistance
(see chart on page 3).
11
14. vB seRIes BITs
Varel’s VB product line is a premium line of matrix bits
featuring two very unique features–oval cutters and lateral
hydraulic jet nozzles. The VB series is designed to provide
better ROP and longer life than bits designed only with
conventional round cutters and hydraulic package.
The oval cutter provides more diamond exposure than a round
cutter sharing the same diamond width. The sharper tip profile
of the oval cutter produces higher point loading, converting
applied weight more efficiently than a round cutter, thereby
increasing ROP.
The lateral jet nozzles, located near the center of the bit,
provide greater efficiencies directing flow across the face of the
bit for optimal cleaning and cooling of cutters. Lateral nozzles,
in combination with conventional nozzles, produce higher ROP
and increased bit life.
As part of the product
development process,
all Varel bits utilize
Computational Fluid
Dynamics evaluations.
Shown: 8 1/2” VB616
laTeral JeT nozzles
VB bits use lateral jet nozzles located near the center of the bit.
These nozzles are oriented in such a way that, when combined
with traditional nozzles, create cross flow hydraulics. This cross
flow optimizes hydraulic energy, cooling and cleaning of the cutters,
enhanced chip removal and efficiently sweeps cuttings away from the
bit face into the annulus. This hydraulic configuration promotes faster
ROP and reduces cutter wear for longer bit life.
12
15. vB s e R I e s A vA I L A B I L I T y :
6” To 17 ½” (152.4 mm To444.5 m m ) – I n m aT r I x
oVal CuTTer
The unique oval cutter design delivers 42% more diamond
exposure than a round cutter of the same width. Because
of its unique shape, the increased exposure provides more
footage drilled and improved bit life helping lower your cost per
foot. Additionally, the oval cutter design produces higher point
loading converting applied weight on bit more efficiently and
dulling with a smaller wear flat than a round cutter of the same
width.
oVal CuTTer adVanTage
A B
Round cutter
Center line Exposure Oval cutter
Exposure
Additional drilling capacity = 42%
powerCuTTer™ CuTTIng sTruCTure
Varel’s high-density “Powercutter” arrangement gives
enhanced bit life when drilling a variety of rock types without
sacrificing ROP. The new Powercutter cutting structure
provides extra exposure and cutter density on the critical
shoulder area of the bit. Bits can now achieve maximum rates
of penetration through one rock formation and then continue
to penetrate harder sand or limestone beds without excessive
wear or damage e.g. interbedded formations.
adVanCed CuTTIng sTruCTure
VB bits are developed using Varel’s proprietary design
software called SPOT™. Using extensive single cutter tests
and full scale bit tests in laboratory and field conditions,
SPOT ensures cutting structure optimization for specific
applications. SPOT models complete bit behavior in different
rock types during a simulated drilling process. In addition, it
evaluates cutter wear as a result of friction and heat transfer.
Using appropriate rock geology and mechanical properties,
SPOT also performs sensitivity analysis for various drilling
parameters (i.e., weight on bit, WOB, and revolutions per
minute, RPM) to evaluate their effects on ROP, cutter wear,
bit vibrations and footage drilled. Using SPOT improves the
ROP and increases the footage drilled of each VB bit.
13
16. HOLe OpeNING BITs
Varel’s bi-center bits are designed to enlarge the well bore,
drilling 15 to 25% larger than the pass through well bore in all
types of PDC drillable formations. The bi-center bits are used
to increase lateral diameter, to replace under reaming, to help
control trouble zones, and for expandable tubulars. The matrix
material construction resists erosion and abrasion found when
drilling oilfield applications. The one-piece design shortens the
overall bit length for better directional control. Varel bi-center
bits also have an innovative force balanced cutting structure
which minimizes cutter and casing damage when drilling out.
Additionally, Varel’s unique design minimizes bit vibrations
often experienced with conventional hole opening tools thereby
resulting in longer downhole tool life and reduced drilling costs.
one-pIeCe ConsTruCTIon
Varel’s unique design, shortens the overall bit length for
better directional control and eliminates the need to have a
connection and weld between the pilot bit and the reamer
section of the bi-center. The one piece construction also allows
for optimal hydraulic configuration with pilot and reamer blade
alignment, optimizing cuttings removal and improving ROP.
hydraulIC desIgn
Nozzle placement, pilot bit and reamer blade alignment
provide a direct flow path to the annulus. The junk slot area
is maintained or increased, resulting in no decrease in fluid
velocity and improved cuttings removal between the pilot
and reamer.
spIraled blades
Varel’s bi-center bits are designed with spiral blades to provide
Shown: better contact with the casing during drill out. Spiral blades
7 1/2” x 8 1/2” VH813 stabilize the bit ensuring less damage to the casing and
resulting in better well bore quality.
The drill-out feature, designed for Varel’s bi-center bit, was recently
awarded a Woelfel Best Mechanical Engineering Achievement Merit Award.
The annual award, sponsored by American Society of Mechanical
Engineers - International Petroleum Institute Petroleum Division
(ASME-IPTI), recognizes a product or system that demonstrates a practical
solution to an engineering challenge in offshore technology.
14
17. HOLe OpeNeRs AvAILABILITy:
3 ¾” x 4 1
/8 ” To 14 ¾” x 17 ½” (95.25 mm x 104.8 mm To 14.34 mm x 444.5 mm) – In maTrIx
Bicenter Drillling Cement Inside the Casing Bicenter in Formation
CuTTIng sTruCTure drIll ouT feaTure
Varel’s Casing Saver Design cutting structure feature provides a
reliable drill out mode while protecting the cutting structure inside
the casing. Because of the bi-center bits unique application, the
bit design is not symmetrical. When drilling out from casing, the bit
rotates on the casing centerline and not the bit centerline. This off
center rotation of conventional bits can cause damage to cutters
located near the center of the pilot bit. This cutter damage is due
to backward rotation of cutters located between the bit centerline
and the casing centerline in the pilot bit. However, Varel has
repositioned cutters between the two centerlines in the nose of
the pilot bit. Our design minimizes the possibility of cutter damage
while inside the casing in drill out mode. As the bit transitions to
formation drilling the cutters begin to rotate normally about the
bit centerline and cut the formation. This small but unique design
philosophy prevents cutter damage when drilling out allowing
efficient rock–cutter interaction during formation drilling.
forCe balanCIng
During the design process, the pilot and reamer cutting structure
are force balanced as a single unit. This provides increased drilling
efficiencies in both vertical and deviated wells. Improved ROP,
increased durability and better directional control are all benefits of
Varel’s force balancing.
CasIng saVer desIgn
Pilot bit design, spiral blades, non contact gage cutters and casing
saver technology all result in minimal casing damage during drill out.
15
18. s p e c I A LT y B I T s : N AT U R A L D I A m O N D , T s p AND cORe BITs
speCIalTy bITs
Varel offers a variety of bits and core bits manufactured with
natural diamond, Thermally Stable Polycrystalline (TSP)
and Polycrystalline Diamond Compact (PDC) materials,
available for specific drilling applications. All designs are
available in matrix with size availability ranging from 4” to
17 ½” (101.6 mm to 444.5 mm).
For additional details, please contact your Varel
Shown: 6” x 2 5/8” C320 representative.
Shown: 6” VN300 Shown: 8 1/2” VN300 Shown: 8 3/8” VP300 Shown: 8 1/2” VP500
Shown: 6” x 2 5/8” C400 Shown: 8 3/8” VN300 Shown: 12 1/4” x 5 1/4” CK58
Shown: 6” x 2 5/8” CK571 Shown: 5 1/2” x 6” VHP300
16
19. n o z z l e s e r I e s 55 & 65, m a k e u p T o r q u e
gage dIameTer ToleranCes
d I a m o n d d r I l l b I T & pd C b I T C o n n e C T I o n referenCe
Diameter API Connection Recommended Torque
in. in. ft./lbs.
Diameter Diameter
in. mm in. mm 3-3/4 to 4-1/2" 2-3/8" REG 3000 - 3500
9/32 7.14 9/32 7.14 4-5/8 to 4-7/8" 2-7/8" REG 6000 - 7000
10/32 7.94 10/32 7.94 5 to 7-1/4" 3-1/2" REG 7000 - 9000
11/32 8.73 11/32 8.73 7-1/2 to 9-1/4" 4-1/2" REG 12000 - 16000
12/32 9.53 12/32 9.53 9-7/8 to 14-1/2" 6-5/8" REG 28000 - 32000
13/32 10.32 13/32 10.32 14-3/4 to 18-1/2" 7-5/8" REG 34000 - 40000
14/32 11.11 14/32 11.11
15/32 11.91 15/32 11.91
16/32 12.70 16/32 12.70
Diamond Drilling, Diamond Core, and PDC Bit Tolerances
17/32 13.49 17/32 13.49
Bit Size, OD OD Tolerances
18/32 14.29 18/32 14.29 in. in. mm
19/32 15.08 6 3/4 and smaller + 0 - 0.015 + 0 - 0.38
20/32 15.88 6 25/32 to 9 inclusive + 0 - 0.020 + 0 - 0.51
21/32 16.67 9 1/32 to 13 3/4 inclusive + 0 - 0.030 + 0 - 0.76
22/32 17.46 13 25/32 to 17 1/2 inclusive + 0 - 0.045 + 0 - 1.14
17 17/32 and larger + 0 - 0.063 + 0 - 1.60
Size of Bit Size & Style of Rotary Bit Sub Bevel Dia.^a Bit Bevel Dia. ^a
in. Pin Connection inches +/- 1/64 millimeters +/- 0.40 inches +/- 1/64 millimeters +/- 0.40
1.75 to 2.24 inclusive 1 reg^b 1.500 38.10 1.532 38.91
2.25 to 3.49 inclusive 1 1/2 reg^c 1.932 49.07 1.964 49.89
3.50 to 4.5 inclusive 2 3/8 reg 3.047 77.39 3.078 78.18
4 17/32 to 5 inclusive 2 7/8 reg 3 39/64 91.68 3 41/64 93.66
5 1/32 to 7 3/8 inclusive 3 1/2 reg 4 7/64 104.38 4 9/64 105.17
7 13/32 to 9 3/8 inclusive 4 1/2 reg 5 21/64 135.33 5 23/64 136.13
9 13/32 to 14 1/2 inclusive 6 5/8 reg 7 23/64 186.93 7 25/64 187.72
14 9/16 to 18 1/2 inclusive 6 5/8 reg or 7 5/8 reg 7 23/64 or 8 15/32 186.93 or 215.11 7 25/64 or 8 1/2 187.72 or 215.90
18 9/16 and larger 7 5/8 reg or 8 5/8 reg 8 15/32 or 9 35/64 215.11 or 242.49 8 1/2 or 9 37/64 218.90 or 243.28
17
23. apI ConVersIon Tables referenCe
equaTIons used In hydraulIC CalCulaTIons:
FROM TO MULTIPLY BY 1. Annular Velocity
VOLUME 2. Surface Equipment Pressure Losses
Barrels Gallons 42 Type Equipment C
1 1.0
Cubic Centimeters Cubic Feet 3.531 x 10-5 2 0.36
Cubic Centimeters Cubic Inches 0.06102 3 0.22
4 0.15
Cubic Centimeters Cubic Meters 10-6
3. Drill Stem Bore Pressure Losses
Cubic Centimeters Gallons 2.642 x 10-4
Cubic Centimeters Liters 0.001
Cubic Feet Cubic Centimeters 28317 4. Jet Nozzle Pressure Losses
Cubic Feet Cubic Inches 1728
Cubic Feet Cubic Meters 0.02832
Cubic Feet Gallons 7.48 5. Annular Pressure Losses
Cubic Feet Liters 28.32
Cubic Inches Cubic Centimeters 16.39 6. Jet Velocity
Cubic Inches Cubic Feet 5.787 x 10-4
Cubic Inches Cubic Meters 1.639 x 10-5
Cubic Inches Gallons 4.329 x 10-3 7. Jet Impact Force
Cubic Inches Liters 0.01639
Cubic Meters Cubic Centimeters 106
8. Hydraulic Horsepower
Cubic Meters Cubic Feet 35.31
Cubic Meters Gallons 264. 2
Gallons Barrels 0.0238
Gallons Cubic Centimeters 3785
Gallons Cubic Feet 0.1337 nomenClaTure:
Gallons Cubic Inches 231
Q = Circulation Rate (gpm)
Gallons Cubic Meters 3.785 x 10-5
Dh = Diameter of Hole (in)
Gallons Liters 3.785
Dp = Diameter of Pipe O.D. (in)
V = Annular Velocity (ft/min)
MASS r = Mud Weight (lb/gal)
Pounds Tons (metric) 4.536 x 10-4 C = Friction Factor
Tons (metric) Pounds 2204 P = Pressure (psi)
L = Length (ft)
Tons (metric) Kilograms 1000
Ah = Area of Nozzle (in2)
∆P = Pressure Drop (psi)
Vh = Jet Velocity (ft/sec)
If = Jet Impact Force (lbf)
HHp = Hydraulic Horsepower (hp)
d = Inside Diameter (in)
21
24. World Headquarters eastern HemispHere
Dallas, Texas USA Africa
Tel: 1.800.827.3526 Hassi-Messaoud, Algeria
Tel: +1.972.242.1160 Tel: +213.2975.4738
Fax: +1.972.242.8770 Fax: +213.2975.4737
INFO@VARELINTL.COM
Cairo, Egypt
Western HemispHere Tel: +20.12.325.3240
Western United States
Fort Worth, Texas USA Asia/Pacific
Tel: 1.800.827.3526 Booragoon, WA Australia
Tel: +1.817.439.1183 Tel: +61.8.9315.9999
Fax: +1.817.439.4294 Fax: +61.8.9315.9800
Odessa, Texas USA Balikpapan, Indonesia
Tel: 1.800.371.1658 Tel: +62.54.287.7859
Tel: +1.432.367.1658 Fax: +62.54.287.7950
Fax: +1.432.550.5385
Kuala Lumpur, Malaysia
Gulf Coast & South Texas Tel: +60.32.693.2255
Houston, Texas USA Fax: +60.32.693.7550
Tel: 1.888.273.5334
Tel: +1.281.670.2401 Ho Chi Minh City, Vietnam
Fax: +1.281.590.6047 Tel: +848.823.2535
Fax: +848.823.2537
Lafayette, Louisana USA
Tel: +1.337.237.4245 Europe
Fax: +1.337.237.4966 Pau, France
Tel: +33.55.914.4825
Mid-Continent & Rockies Fax: +33.44.914.4844
Oklahoma City, Oklahoma USA
Tel: 1.888.731.4046 Den Helder, The Netherlands
Tel: +1.405.672.3633 Tel: +31. 223.691.200
Fax: +1.405.672.4696 Fax: +31.223.691.201
Southeastern United States Middle East
Flint, Texas USA Muttrah, Oman
Tel: +1.903.894.5923 Tel: +968.789.070
Fax: +1.903.894.5925
Islamabad, Pakistan
Canada Tel: +92.51.225.6170
c/o Pendemak Industries Fax: +92.51.225.6190
Edmonton, Alberta Canada
Tel: 1.888.988.4988 Doha, Qatar
Tel: +1.780.435.5706 Tel: +974.44.38.986
Fax: +1.780.438.3290 Fax: +974.44. 38.986
Al Khobar, Saudi Arabia
Tel: +966.3887.9273
Fax: +966.3887.4479
Abu Dhabi, UAE
Tel: +97.12.644.8414
Fax: +97.12.644.8424
Dubai, UAE
Tel: +971.4335.3525
Fax: +971.4335.3532
United Kingdom
Aberdeen, Scotland, UK
Tel: +44.122.421.6310
Fax: +44.122.489.1450
For other regions, contact Varel’s world headquarters or email inFo@Varelintl.com.
w w w. va r e l i n t l . c o m
MKTG 12A600-09-2006
