Negotiable
The date of payment from buyers deliver within days
Beijing
Long-term effective
2017-12-28 00:08
31
Size(in) | Size(mm) | IADC | WOB(kN/mm) | RPM(r/min) | Applicable formation |
17 1/2 | 444.5 | 537 | 0.35-1.0 | 220-60 | Soft to medium formations with low compressive strength, such as medium soft shale, medium soft limestone, medium soft sandstone, medium formation with harder, abrasive interbed and so on |