Negotiable
The date of payment from buyers deliver within days
Beijing
Long-term effective
2017-11-27 09:43
136
Size(in) | Size(mm) | IADC | WOB(kN/mm) | RPM(r/min) | Applicable formation |
8 1/2 | 215.9 | 527 | 0.35-1.0 | 220-60 | Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft shale, soft limestone, etc. |