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The right-angled blade structure has a stronger side cutting capability and is suitable for multi-branch hole drilling. It is commonly used for the directional drilling construction of gas extraction hole, water-prospecting and drainage hole and grouting reinforcement hole etc.
Common Drill Bits Specifications (mm) | Φ96/Φ98 | Φ120 | φ133 | Φ153 | |
---|---|---|---|---|---|
Drill Bits Parameters | Number of blades | 3(4) | 4(5) | 4(5) | 5(6) |
Main cutter size (mm) | 13.44 | 13.44/15.88 | 13.44/15.88 | 15.88 | |
Number of main cutters | 8~10 | 10~15 | 14~18 | 17~20 | |
Gauge cutter | hard alloy or composite sheet | hard alloy or composite sheet | hard alloy or composite sheet | hard alloy or composite sheet | |
Number of water holes | 3(4) | 4(5) | 4(5) | 5(6) | |
Drilling Regime Parameters | Recommended drill pressure (KN) | 20-40 | 30-60 | 40-70 | 50-80 |
Recommended speed (RPM) | 150~300 | 120~260 | 120~260 | 100~200 | |
Recommended displacement (L/min) | 150~300 | 200~360 | 200~360 | 250~480 |