Tri-cone Rock Bit has a widest variety of uses. Cutting teeth cut the bottom alternately. The rock breaking torsion and the contact area between teeth and bottom are small, while the specific pressure is high. This makes the bit easier to enter the stratum. The total working blade is long, which can reduce formation abrasion. Tri-cone Rock Bit is suitable for various formations from soft to hard.
Formation
Bit Type
Bit Type(KN/mm)
Rotary Speed
(r/m)
Very soft: such as soft marl, unconsolidated sand-stone, salt, etc.
437
0.4-0.7
200-60
Soft: such as clay, marl, unconsolidated sand-stone, salt, etc.
517
0.5-0.85
200-60
Medium soft: such as shale, marl, sandstone,soft limestone, etc.
537
0.5-0.9
180-40
Type
IADC
Bit Size
Std.API pin Shank
(inches)
Approximate
(Kg)
Inches
mm
3 3/8GY537
537
3 3/8
85.7
1 57/64
3
3 7/8GY517
517
3 7/8
98.4
2 3/8REG
5
3 7/8GY537
537
3 7/8
98.4
2 3/8REG
5
4 5/8GY537
537
4 5/8
117.5
3 1/2REG
8
5 5/8GY537
537
5 5/8
142.9
3 1/2REG
13
5 7/8GY537
537
5 7/8
149.2
3 1/2REG
13
6 1/4GY517
517
6 1/4
159.3
3 1/2REG
20
7 5/8GY517
517
7 5/8
193.7
4 1/2REG
32
7 5/8GY537
537
7 5/8
193.7
4 1/2REG
32
7 7/8GY517
517
7 7/8
200
4 1/2REG
35
7 7/8GY537
537
7 7/8
200
4 1/2REG
35
8 1/2GY437
437
8 1/2
215.9
4 1/2REG
42
8 1/2GY447G
447
8 1/2
215.9
4 1/2REG
42
8 1/2GY447T
447
8 1/2
215.9
4 1/2REG
42
8 1/2GY517
517
8 1/2
215.9
4 1/2REG
42
8 1/2GY517FT
517
8 1/2
215.9
4 1/2REG
42
8 1/2GY537
537
8 1/2
215.9
4 1/2REG
42
8 1/2GY537T
537
8 1/2
215.9
4 1/2REG
42
8 1/2GYT437L
437
8 1/2
215.9
4 1/2REG
42
8 1/2GYT517L
517
8 1/2
215.9
4 1/2REG
42
8 3/4GY447G
447
8 3/4
222.3
4 1/2REG
43
8 3/4GY447T
447
8 3/4
222.3
4 1/2REG
43
8 3/4GY517B
517
8 3/4
222.3
4 1/2REG
43
8 3/4GY517T
517
8 3/4
222.3
4 1/2REG
43
8 5/8GY537
537
8 5/8
219
4 1/2REG
42
9 1/2GY437
437
9 1/2
241.3
6 5/8REG
60
9 1/2GY517
517
9 1/2
241.3
6 5/8REG
60
9 1/2GY517FT
517
9 1/2
241.3
6 5/8REG
60
9 1/2GYT437L
437
9 1/2
241.3
6 5/8REG
60
9 3/4GYT437L
437
9 3/4
247.7
6 5/8REG
65
9 5/8GY517
517
9 5/8
244.5
6 5/8REG
65
9 7/8GY517
517
9 7/8
250.8
6 5/8REG
65
9 7/8GY537
537
9 7/8
250.8
6 5/8REG
65
12 1/4GY437T
437
12 1/4
311.2
6 5/8REG
98
12 1/4GY517
517
12 1/4
311.2
6 5/8REG
98
12 1/4GY517T
517
12 1/4
311.2
6 5/8REG
98
12 1/4GY537
537
12 1/4
311.2
6 5/8REG
98
135/8GY517T
517
135/8
346.1
6 5/8REG
134
17 1/2GY517G
517
17 1/2
444.5
7 5/8REG
251
