| Basical Specification | |||
| IADC Code | IADC545 | ||
| Size of Rock Bit | 6 1/4 inches | 7 7/8 inches | 9 ” |
| 159mm | 200mm | 229mm | |
| Thread Connection | 3 1/2” API REG PIN | 4 1/2” API REG PIN | 4 1/2” API REG PIN |
| Product Weight: | 20kgs | 34KG | 50KG |
| Bearing Type: | Roller-Ball-Roller-Thrust Button/Sealed Bearing | ||
| Circulation Type | Jet Air | ||
| Operating Parameters | |||
| Weight on Bit: | 12,504-32,154Lbs | 15,750-39,380Lbs | 18,000-45,000Lbs |
| Rotary Speed: | 110-80RPM | ||
| Air Back Pressure: | 0.2-0.4 MPa | ||
| Ground Description: | Medium hard and abrasive rocks such as sandstone with streaks of quartz, hard limestone or chert, hematite ores, hard, well-compacted abrasive rock such as: sandstone with quartz binder, dolomite, quartzite shale, magma and metamorphic coarse grained rocks. | ||