1.API 8 1/2'' IADC 417 rubber sealed bearing insert tooth tricone bit
2.Meet with API Spec7-1 ISO 9001:2008
3.Center drill bit
2.Meet with API Spec7-1 ISO 9001:2008
3.Center drill bit
4.IADC code suitable for different formations
5.High temperature and wear resistance
6.Good quality and after-sale service
7.Long service life and resonable price
About us
Hejian Wanxiang Drilling Equipments Co. Ltd.
We produce the drilling bits strictly according to our customers' requirements with advanced equipments to make the quality perfect.
Specification
IADC | 437 | 517 | 537 | 617 | 637 | 737 | |
WOB | KN/mm (bit dia.) | 0.5-0.75 | 0.5-0.85 | 0.5-0.85 | 0.55-0.85 | 0.55-0.85 | 0.55-0.85 |
Lb/in (bit dia.) | 2860-4280 | 2860-4860 | 2860-4860 | 3140-4860 | 3140-4860 | 3140-4860 | |
r.p.m | 70-45 | 70-45 | 70-45 | 70-45 | 60-40 | 60-40 |
Size | Bit Type | |
In. | mm | |
6 | 152.4 | 517, 537, 617, 637 |
6 1/2 | 165.1 | 617 |
7 1/2 | 190.5 | 517, 537 |
8 1/2 | 215.9 | 437, 517, 537,617,637 |
9 1/2 | 241.3 | 437, 517,537,617,637 |
9 5/8 | 244.5 | 517,537 |
9 7/8 | 250.8 | 517,537 |
12 1/4 | 311.1 | 437, 517, 537,617,637 |
17 1/2 | 444.5 | 517,537 |