This series of bit products has been put into Jiangxi Province New Products Plan. It utilizes one of the advanced world technologies, structures of rigid sealing, which can work stably at high drilling speed. It is the ideal tool for directional drilling and horizontal drilling and can provide better drilling performance with screwdrills. Compared to common rubber sealing bits in China, this series can provide a promotion around 35% in average life (net drilling time), which has reached advanced domestic metal face sealing bit products.
|
Formation |
Bit Type |
Drilling Weight(KN/mm) |
Rotary Speed(r/m) |
|
Very soft with low compressive strength, such as soft marl, clay,unconsolidated sandstorm, salt, etc. |
GHJ437 |
0.35-0.90 |
300-60 |
|
Soft with low compressive strength, such as shale, clay, sandstone, soft limestone, etc. |
GHJ517 |
0.35-1.05 |
250-60 |
|
Medium soft with hard abrasive streak, such as hard shale, soft limestone,sandstone, etc. |
GHJ537 |
0.5-1.05 |
200-40 |
|
Type |
IADC |
Bit Size |
Std.API pin Shank Std.API pin Shank (inches) |
Approximate weight of bits(Kg) |
|
|
Inches |
mm |
||||
|
8 1/2GHJ437T |
437 |
8 1/2 |
215.9 |
4 1/2REG |
42 |
|
8 1/2GHJ437G |
437 |
8 1/2 |
215.9 |
4 1/2REG |
42 |
|
8 1/2GHJ447T |
447 |
8 1/2 |
215.9 |
4 1/2REG |
42 |
|
8 1/2GHJ517T |
517 |
8 1/2 |
215.9 |
4 1/2REG |
42 |
|
8 1/2GHJ51(G |
517 |
8 1/2 |
215.9 |
4 1/2REG |
42 |
|
8 1/2GHJT437G |
437 |
8 1/2 |
215.9 |
4 1/2REG |
42 |
|
8 1/2GHJT517G |
517 |
8 1/2 |
215.9 |
4 1/2REG |
42 |
|
8 1/2GHJ517GK |
517 |
8 1/2 |
215.9 |
4 1/2REG |
42 |
|
9 1/2GHJ437T |
437 |
9 1/2 |
241.3 |
6 5/8REG |
60 |
|
9 1/2GHJ437G |
437 |
9 1/2 |
241.3 |
6 5/8REG |
60 |
|
9 1/2GHJ447T |
447 |
9 1/2 |
241.3 |
6 5/8REG |
60 |
|
9 1/2GHJ517T |
517 |
9 1/2 |
241.3 |
6 5/8REG |
60 |
|
9 1/2GHJ517G |
517 |
9 1/2 |
241.3 |
6 5/8REG |
60 |
|
12 1/4GHJ437T |
437 |
12 1/4 |
311.2 |
6 5/8REG |
98 |
|
12 1/4GHJ517T |
517 |
12 1/4 |
311.2 |
6 5/8REG |
98 |
