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| Common Drill Bits Specifications (mm) | Φ77 | φ94/φ113 | φ133 | φ153 | HQ(φ96 Wireline coring drilling） | |
|---|---|---|---|---|---|---|
| Drill Bits Parameters | Set number of cutters | 6 | 8 | 10 | 12 | 8 |
| Main cutter size (mm) | 13.44 | 13.44 | 13.44 | 13.44 | 13.44 | |
| Number of main cutters | 6 | 8 | 10 | 12 | 8 | |
| Gauge cutter | hard alloy | hard alloy | hard alloy | hard alloy | hard alloy | |
| Drilling Regime Parameters | Recommended drill pressure (KN) | 20-30 | 20-40 | 30-50 | 30-60 | 20-40 |
| Recommended speed (RPM) | 200~350 | 150~280 | 100~200 | 100~180 | 150~300 | |
| Recommended displacement (L/min) | 100~150 | 100~240 | 200~300 | 200~350 | 100~200 | |