ROCK BITS - GT Engineering

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ROCK BITS - GT Engineering
3 7/8” - 12 1/4”
ROCK
BITS
Digital Catalog
Current January, 2008
GT® ENGINEERING, INC.
For decades, the Gault family has been providing quality rock bits to the
drilling industry. What began as a small fabricating shop in Allen, OK is
now a state of the art manufacturing facility in Shawnee, Oklahoma. Our
attention to detail and hands-on philosophy have been demonstrated
throughout this long history. By working closely with drillers, we developed
our first jet bit in 1946 and patented it in 1950.
This patent, (#2,524,428), was for the jetted rock bit that revolutionized the
hydraulics at the bottom of the hole. Today this relationship is still evident
when we are able to produce new and improved cutting structures for specific fields in a matter of weeks. We regularly expand our product line to
meet more and more drilling challenges. Our in-house carbide plant allows
us to produce high quality, specialty carbides for numerous applications. We are dedicated to improving manufacturing processes but we never shortchange our quality. Every bit we make is to the highest standards in materials, metallurgical processes and workmanship. This dedication ensures the consistency that drillers rely on day after day.
GT Bit
Page
04X
3
09X
4
15X
5
18X
6
22X
7
23X
8
24X
9
25X
10
25Y
11
31X
12
33Y
13
35X
14
35Y
15
38Y
16
40A
17
40AG
18
42X
19
43X
20
44X
21
44Y
22
45Y
23
55Y
24
This forging means you have
a genuine GT® Bit.
It means reliablity,
performability
& superior ROP.
GT04X 12 1/4”
GT® Bits are Made in the USA and Shipped World Wide
GT® Engineering, Inc.
7 American Way
Shawnee, OK 74802
(405)395-0500
[email protected]
www.gtengineering.com
Cross Reference Coming
Availability
Coming
Bit photographs in this catalog are shown in grayscale for optimal clarity and detail.
GT is a registered trademark of GT® Engineering, Inc.
2
© GT® Engineering, Inc.
GT® ENGINEERING, INC.
GT
®
Rock Bits
IADC 417
Application Range 417 - 427
04X
ASSY # 3540
12 1/4” (311mm)
PRODUCT APPLICATION
Effective in low compressive strength, soft
sedimentary formations
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 9
Inner Row Inserts: 42 - 3/4” & 7/8” Chisel
Heel Row Inserts: 39 - 7/8” Chisel
Bit Connection: 6 5/8” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 1500 - 4000 lb/in of bit diameter
Normal Rotary Speed Range: 80-180 RPM
CROSS REFERENCE
Hughes: GX-03
Reed: TD41
Security: XS03
Smith: GFS04
12 1/4” (311mm)
8 3/4” (222MM)
3
Digital Catalog
GT® ENGINEERING, INC.
GT
Rock Bits
®
IADC 437
Application Range 427 - 447
09X
7 7/8” (200mm)
ASSY # 3410
PRODUCT APPLICATION
This bit has a very aggressive offset for an outstanding penetration rate in very soft and poorly consolidated formations. The small dome inserts keep the bit
in gage without slowing it down.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 12
Inner Row Inserts: 50 - 9/16” Chisel
Heel Row Inserts: 60 - 9/16” WCC & 1/4” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Uses same nozzles as 7 7/8”
AVAILABLE OPTIONS
Shirttail Protection
6” (152mm)
OPERATING PARAMETERS
Weight on Bit Range: 1500 - 5000 lb/in of bit diameter
Normal Rotary Speed Range: 50 - 110 RPM
CROSS REFERENCE
Hughes: GT09
Reed: HP43
Security: XS09, XS10
Smith: F1
4
6” (152mm)
Digital Catalog
GT® ENGINEERING, INC.
GT
Rock Bits
®
15X
Digital Catalog
IADC 437
Application Range 427 - 437
7 7/8” (200mm) Shown
ASSY # 2710
PRODUCT APPLICATION
Effective in low compressive strength,
soft sedimentary formations.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 10
Inner Row Inserts: 47 - 9/16” Chisel
Heel Row Inserts: 33 - 1/2” WCC
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver-plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 1500 - 4000 lb/in of bit diameter
Normal Rotary Speed Range: 80-180 RPM
This bit has very blunt ovoid inserts on the inner rows
and domes on the gage row for very hard and abrasive
formations that have a high compressive strength.
CROSS REFERENCE
Hughes: GT09
Reed: TD43
Security: XS10
Smith: F1
5
GT® ENGINEERING, INC.
GT
®
18X
Rock Bits
Digital Catalog
IADC 447
Application Range 437 - 517
7 7/8” (200mm) Shown
ASSY # 2750
PRODUCT APPLICATION
Effective in low compressive strength, soft
sedimentary formations
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 10
Inner Row Inserts: 47 - 9/16” Chisel
Heel Row Inserts: 33 - 1/2” WCC
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 1500 - 4000 lb/in of bit diameter
Normal Rotary Speed Range: 80 - 180 RPM
CROSS REFERENCE
Hughes: GT09
Reed: TD43
Security: XS10
Smith: F1
Slightly denser carbide drill pattern than the GT15X with
the same offset for fast drilling through slightly harder
formations.
6
GT® ENGINEERING, INC.
GT
®
22X
Rock Bits
IADC 517
Application Range 517 - 527
8 3/4” (200mm) Shown
ASSY # 3740
PRODUCT APPLICATION
Most effective in soft, low-compressive strength
formation that respond to sharp, chisel inserts.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 10
Inner Row Inserts: 57 - 9/16” & 5/8” Chisel
Heel Row Inserts: 44 - 9/16” Chisel
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
Uses same nozzles as 7 7/8”
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 2000 - 5000 lb/in of bit diameter
Normal Rotary Speed Range: 60-160 RPM
CROSS REFERENCE
Hughes: GX22
Reed: TD51X
Security: XS22
Smith: FH22
7
Digital Catalog
GT® ENGINEERING, INC.
GT
®
23X
Rock Bits
IADC 517
Application Range 517 - 527
8 3/4” (222mm) Shown
ASSY # 3760
PRODUCT APPLICATION
For use in soft, low-compressive strength formations
that respond to the gouging, cutting action of more
rounded inserts.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 10
Inner Row Inserts: 57 - 9/16” & 5/8” SC Chisel
Heel Row Inserts: 44 - 9/16” WC Chisel
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
Uses same nozzles as 7 7/8”
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 2000 - 5000 lb/in of bit diameter
Normal Rotary Speed Range: 60 - 160 RPM
CROSS REFERENCE
Hughes: GX23
Reed: HP51
Security: XS23
Smith: FH23
8
Digital Catalog
GT® ENGINEERING, INC.
GT
®
24X
Rock Bits
IADC 517
7 7/8” (200mm) Shown
ASSY # 2850
PRODUCT APPLICATION
Soft, low-compressive strength formations.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 10
Inner Row Inserts: 55 - 9/16” & 1/2” Chisel
Heel Row Inserts: 37 - 9/16” Chisel
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 1500 - 4000 lb/in of bit diameter
Normal Rotary Speed Range: 80-180 RPM
CROSS REFERENCE
Hughes: GT20
Reed: TD51X
Security: XS20
Smith: F2
9
Digital Catalog
GT® ENGINEERING, INC.
GT
®
25X
Rock Bits
Digital Catalog
IADC 517
Application Range 437 - 527
7 7/8” (200mm) Shown
ASSY # 3510
PRODUCT APPLICATION
Most effective in softer formations. Addition of
dome shaped inserts in the gage row prevents
undersize holes in abrasive formations.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 11
Inner Row Inserts: 59 - 9/16” Chisel
Heel Row Inserts: 40 - 7/16” WCC & 3/8” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 2000 - 5000 lb/in of bit diameter
Normal Rotary Speed Range: 60-160 RPM
CROSS REFERENCE
Hughes: GX25
Reed: HP52X
Security: XS24
Smith: FH26
The GT25X has sturdy chisel inserts on the inner rows
and a combination of wedge-crested chisels and domes
on the gage row to keep the hole in gage through more
abrasive formations.
10
GT® ENGINEERING, INC.
GT
®
25Y
Rock Bits
Digital Catalog
IADC 527
Application Range 527 - 537
7 7/8” (200mm) Shown
ASSY # 2610
PRODUCT APPLICATION
Most effective in soft to medium strength
sedimetary formations.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 11
Inner Row Inserts: 64 - 9/16” Conical
Heel Row Inserts: 41 - 7/16” WCC & 3/8” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 2000 - 5500 lb/in of bit diameter
Normal Rotary Speed Range: 60-140 RPM
Identicle to the GT25X except it has substituted long,
conical inserts in the inner rows. This is best used in formations that respond to conical inserts.
CROSS REFERENCE
Hughes: GT20C
Reed: TD521
Security: XS27
Smith: F27
11
GT® ENGINEERING, INC.
GT
®
31X
Rock Bits
IADC 527
Application Range 527 - 537
8 3/4” (222mm) Shown
ASSY # 3220
PRODUCT APPLICATION
This bit is a very aggressive, medium bit; fast and
tough. It has double gage packs to give it full heelrow protection to maintain gage.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 12
Inner Row Inserts: 90 - 9/16” Chisel
Heel Row Inserts: 47 - 7/16” WCC
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
Uses same nozzles as 7 7/8”
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 2000 - 5500 lb/in of bit diameter
Normal Rotary Speed Range: 60 - 140 RPM
CROSS REFERENCE
Hughes: GX30
Reed: R28AM
Security: XS31
Smith: FH30
12
Digital Catalog
GT® ENGINEERING, INC.
GT
®
33Y
Rock Bits
IADC 537
Application Range 537 - 547
7 7/8” (200mm) Shown
ASSY # 3830
PRODUCT APPLICATION
Most effective in medium hard formations that have
frequent stringers of harder material. It combines the
toughness of harder formations with the exposure of
softer ones.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 36º
Seal Type: O-ring
Number of Rows: 11
Inner Row Inserts: 73 - 9/16” Conical
Heel Row Inserts: 41 - 7/16” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 3000 - 6000 lb/in of bit diameter
Normal Rotary Speed Range: 50 - 110 RPM
CROSS REFERENCE
Hughes: GX30C
Reed: HP53
Security: XS33
Smith: FH32
13
Digital Catalog
GT® ENGINEERING, INC.
GT
®
35X
Rock Bits
Digital Catalog
IADC 537
Application Range 537 - 547
8 3/4” (222mm) Shown
ASSY # 3790
PRODUCT APPLICATION
Most effective in soft to medium formations with
harder streaks.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 11
Inner Row Inserts: 66 - 9/16” & 5/8” Chisel
Heel Row Inserts: 46 - 1/2” WCC
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Uses same nozzles as 7 7/8”
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 3000 - 6000 lb/in of bit diameter
Normal Rotary Speed Range: 50 - 110 RPM
CROSS REFERENCE
Hughes: GX35
Reed: TD53
Security: XS33
Smith: FH35
This bit combines the aggressive skew with durable,
chisel inserts that will provide a high rate of penetration
and not be damaged by any hard stringers found in the
well bore.
14
GT® ENGINEERING, INC.
GT
®
35Y
Rock Bits
Digital Catalog
IADC 547
Application Range 547 - 617
7 7/8” (200mm) Shown
ASSY # 2551
PRODUCT APPLICATION
Most effective in medium-strength formations
with streaks of harder materials.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 11
Inner Row Inserts: 69 - 9/16” Conical
Heel Row Inserts: 40 - 7/16” WCC
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 3000 - 6000 lb/in of bit diameter
Normal Rotary Speed Range: 50-110 RPM
Identicle to the GT35X but with conical inserts. This
bit has wedge-crested, gage row inserts just like the
GT35X.
CROSS REFERENCE
Hughes: GT30C
Reed: HP54
Security: XS30
Smith: F35
15
GT® ENGINEERING, INC.
GT
®
38Y
Rock Bits
Digital Catalog
IADC 547
Application Range 547 - 617
7 7/8” (200mm) Shown
ASSY # 2630
PRODUCT APPLICATION
Most effective in medium-strength formations with
streaks of harder materials.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 11
Inner Row Inserts: 69 - 9/16” Conical
Heel Row Inserts: 40 - 7/16” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 3000 - 6000 lb/in of bit diameter
Normal Rotary Speed Range: 50 - 110 RPM
CROSS REFERENCE
Hughes: GT30C
Reed: TD54
Security: XS37
Smith: F37
Conical, inner-row inserts and domed, gage row
inserts, situated on an aggressive skew, make this
an ideal bit for medium-soft formations with harder
streaks.
16
GT® ENGINEERING, INC.
GT
Rock Bits
®
40A
IADC 617
Application Range 617 - 627
8 3/4” (222mm) Shown
ASSY # 3320
PRODUCT APPLICATION
Small, tightly packed inserts provide a rapid penetration
rate when using air drilling. Double rows of gage packs
provide full, heel-row coverage.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 36º
Seal Type: O-ring
Number of Rows: 13
Inner Row Inserts: 97 - 1/2” Conical
Heel Row Inserts: 58 - 7/16” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Dense Cutting Structure
Minimal Offset
Uses same nozzles as 7-7/8”
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 3500 - 6000 lb/in of bit diameter
Normal Rotary Speed Range: 40 - 80 RPM
CROSS REFERENCE
Hughes: XL40A
Reed: TD61A
Smith: F47A
The GT40A is an extremely durable and
aggressive air drilling, sealed-bearing bit.
This bit has a very dense insert pattern of
conical inserts on the inner rows and
domed inserts on the gage rows.
17
Digital Catalog
GT® ENGINEERING, INC.
GT
®
40AG
Rock Bits
IADC 617
Application Range 617 - 627
11” (279mm) Shown
ASSY # 3320
PRODUCT APPLICATION
Small, tightly packed inserts provide a rapid penetration rate when using air drilling. Double rows of gage
packs provide full, heel-row coverage.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 13
Inner Row Inserts: 97 - 1/2” Conical
Heel Row Inserts: 58 - 7/16” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Dense Cutting Structure
Minimal Offset
Uses same nozzles as 7-7/8”
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 3500 - 6000 lb/in of bit diameter
Normal Rotary Speed Range: 40 - 80 RPM
CROSS REFERENCE
Hughes: XL40A
Reed: TD61A
Smith: F47A
18
Digital Catalog
GT® ENGINEERING, INC.
GT
®
42X
Rock Bits
IADC 617
Application Range 547 - 617
8 3/4” (222mm) Shown
ASSY # 3840
PRODUCT APPLICATION
Best used in medium formations with hard streaks.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 33º
Seal Type: O-ring
Number of Rows: 15
Inner Row Inserts: 107 - 3/8” & 7/16” Dome, 1/2” Chisel
Heel Row Inserts: 50 - 7/16” Contoured Wedge Chisel
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
Uses same nozzles as 7-7/8”
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 3000 - 6000 lb/in of bit diameter
Normal Rotary Speed Range: 50-110 RPM
CROSS REFERENCE
Hughes: GX44
Reed: TD61
Security: XS42
Smith: F47
Less skew than that found on the softer bits.
The GT42X has chisel inserts throughout
the cutting structure. The inserts on the gage
row are wedge-crested chisels that enable it
to cut effectively in medium formations.
19
Digital Catalog
GT® ENGINEERING, INC.
GT
®
43X
Rock Bits
IADC 617
Application Range 617 - 627
8 3/4” (222mm) Shown
ASSY # 3860
PRODUCT APPLICATION
The GT43X is best used in medium formations with
hard streaks.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 36º
Seal Type: O-ring
Number of Rows: 15
Inner Row Inserts: 108 - 3/8” & 7/16” Dome, 1/2” Chisel
Heel Row Inserts: 52 - 7/16” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
Uses same nozzles as 7 7/8”
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 3500 - 6000 lb/in of bit diameter
Normal Rotary Speed Range: 40 - 80 RPM
CROSS REFERENCE
Hughes: GX44
Reed: TD61
Security: XS42
Smith: F47
20
Digital Catalog
GT® ENGINEERING, INC.
GT
®
44X
Rock Bits
IADC 627
Application Range 617 - 627
8 3/4” (222mm) Shown
ASSY # 3810
PRODUCT APPLICATION
An aggressive bit designed to go through formations
with high compressive strength with some harder
stringers.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 36º
Seal Type: O-ring
Number of Rows: 15
Inner Row Inserts: 108 - 3/8” & 7/16” Dome, 1/2” Chisel
Heel Row Inserts: 52 - 7/16” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
Uses same nozzles as 7 7/8”
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 3500 - 6000 lb/in of bit diameter
Normal Rotary Speed Range: 40 - 80 RPM
CROSS REFERENCE
Hughes: GX44
Reed: TD62
Security: XS46
Smith: F47
21
Digital Catalog
GT® ENGINEERING, INC.
GT
Rock Bits
®
44Y
IADC 627
Application Range 627 - 637
8 3/4” (222mm) Shown
ASSY # 3820
PRODUCT APPLICATION
Effective in formations with high compressive strength with
some harder stringers.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 36º
Seal Type: O-ring
Number of Rows: 15
Inner Row Inserts: 108 - 3/8” & 7/16” Dome, 1/2” Conical
Heel Row Inserts: 52 - 7/16” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
Uses same nozzles as 7 7/8”
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 3500 - 6000 lb/in of bit diameter
Normal Rotary Speed Range: 40 - 80 RPM
CROSS REFERENCE
Hughes: GX44C
Reed: TD62
Security: XS47
Smith: F43Y
The GT44Y has ovoid inserts on
the gage row. It is most effective in
harder formations.
The GT44Y has proven itself with
a rate of penetration superior to
comparable bits.
22
Digital Catalog
GT® ENGINEERING, INC.
GT
®
45Y
Rock Bits
IADC 627
Application Range 617 - 637
7 7/8” (200mm) Shown
ASSY # 2410
PRODUCT APPLICATION
Most effective in medium to medium hard formations.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 36º
Seal Type: O-ring
Number of Rows: 13
Inner Row Inserts: 80 - 1/2” Conical
Heel Row Inserts: 48 - 7/16” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 3500 - 6000 lb/in of bit diameter
Normal Rotary Speed Range: 40 - 70 RPM
CROSS REFERENCE
Hughes: GX45C
Reed: TD63
Security: XS51
Smith: F47Y
Slightly more dense than the GT44Y
for slightly harder and more abrasive
formations.
It too has ovoid inserts on the inner
rows and domes on the gage row.
23
Digital Catalog
GT® ENGINEERING, INC.
GT
®
Rock Bits
IADC 637
55Y
7 7/8” (200mm)
ASSY # 2800
PRODUCT APPLICATION
Use in medium hard formations with abrasive qualities.
DESIGN SPECIFICATIONS
Bearing Type: Sealed Friction
Journal Angle: 36º
Seal Type: O-ring
Number of Rows: 14
Inner Row Inserts: 79 - 1/2” Conical
Heel Row Inserts: 45 - 7/16” Dome
Bit Connection: 4 1/2” API Reg.
SPECIAL FEATURES
Silver Plated BeCu Bushing &
Silver Plated Thrust Washer
Aggressive Cutting Structure
Moderate Offset
AVAILABLE OPTIONS
Shirttail Protection
OPERATING PARAMETERS
Weight on Bit Range: 1500 - 4000 lb/in of bit diameter
Normal Rotary Speed Range: 80 - 180 RPM
CROSS REFERENCE
Reed: TD63
Security: XS52
Smith: F57Y
6 1/4” (159mm)
24
Digital Catalog

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