Drilling Bits For Oil Well Drilling

The main structure features:
This series have two kinds of classification: inserted bit and steel tooth.
1.Inserted bit is inserted teeth jet bit with sealed journal of oil bearing. Adopting the optimized design, the teeth placement of cone is reasonable, the tooth shape and height are designed differently in accordance with various kinds of rock formations, and gage protection is better. The bear system which is adopted copper inlaid and silver plating improve the loading capacity and serzure resistance, and prolong the bit working life.
Type IADC BIT SIZE Std. API pin shank size (inches) Approximate weight of bits (kg)
inches mm
3 3/8GY537 537 3 3/8 85.7 1 57/64 (No stds) 3
3 7/8GY537 537 3 7/8 98.4 2 3/8 REG 5
4 5/8GY537 537 4 5/8 117.5 2 7/8 REG 8
5 5/8GY537 537 5 5/8 142.9 3 1/2 REG 13
5 7/8GY537 537 5 7/8 149.2 3 1/2 REG 13
6 1/4GY517 517 6 1/4 159.3 3 1/2 REG 20
7 5/8GY517 517 7 5/8 193.7 4 1/2REG 32
7 5/8 GY537 537 7 5/8 193.7 4 1/2REG 32
7 7/8GY517 517 7 7/8 200 4 1/2REG 35
Note:the type numbers which are not shown in the table can be customized
2.Steel tooth bit is tri-cone bit with roller bearing for oil well drilling. The tooth surface is welded and applied with tungsten carbide power coat. .
Type IADC BIT SIZE Std.API pin shank size (inches) Approximate weight of bits (kg)
inches mm
3 7/8GY131 131 3 7/8 98.4 2 3/8REG 5
8 1/2GY121 121 8 1/2 215.9 4 1/2REG 40
8 1/2GY127 127 8 1/2 215.9 4 1/2REG 40
9 5/8GY121 121 9 5/8 244.5 6 5/8REG 55
9 5/8GY124 124 9 5/8 244.5 6 5/8REG 55
12 1/4GY121 121 12 1/4 311.2 6 5/8REG 90
12 1/4GY126 126 12 1/4 311.1 6 5/8REG 90
13 3/4GY127 127 13 3/4 349.3 6 5/8REG 130
17 1/2GY124 124 17 1/2 444.5 7 5/8REG 246
Note:the type numbers which are not shown in the table can be customized