| Product Specifications |
Diameter 7 1/2"(190.5mm) Bearing type Rubber sealed bearing Cutting tooth type Steel tooth/milling tooth Drilling circulation type Mud circulation Connection thread type 4 1/4 reg male thread Gear diameter protection (diameter protection) None Back protection None |
| Operation Parameters | |
| Drilling Speed(r/min) | 150-60 |
| Drilling Pressure(KN) | 67-181 |
| Applicable Stratum | Medium formations with high compressive strength, such as medium-soft shale, anhydrite, medium-soft limestone, medium-soft sandstone and soft formations with hard interlayers. |