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drill roller bits
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drill bits
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- DRILLING ROLLER BITS
FEATURE :
- Adopt high-speed bearing metal sealed technology , long working life under the screw drilling condition
- High efficiency cutting edge and structure to improve drill speed.
- Cutter shell self-protection shape to reduce abrasion of detritus and unbreakable rock
- Best choice for directional well, horizontal hole and horizontal branch wells .
Bit Diameter |
API PIN |
|
(inch) |
(mm) |
|
3 7/8''~5 1/4'' |
98~134 |
2 3/8''. 2 7/8'' |
5 5/8''~6 3/4'' |
143~171 |
3 1/2'' |
7 1/2''~9 1/2'' |
190.5~241 |
4 1/2'' |
9 5/8''~13 3/4'' |
245~350 |
6 5/8'' |
14 5/8''~26'' |
371~660.4 |
7 5/8'' |
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