| Product Specifications |
Diameter 17 1/2"(444.5mm) Bearing type Rubber sealed bearing Cutting tooth type Steel tooth/milling tooth Drilling circulation type Mud circulation Connection thread type 7 5/8 reg male thread Gear diameter protection (diameter protection) Yes Back protection Yes |
| Operation Parameters | |
| Drilling Speed (r/min) | 150-60 |
| Drilling PressureKN) | 156-423 |
| 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. |