| Drill Bit Parameters | Application | |
| Tri-cone bits type | GRT-637 8 1/2'' | Compression strength 110—150MPa, Hard formation, such as quartzite, granite Gabbtp, basalt, dolomite,ect. |
| IADC code | 637 | Main technical feature |
| Carbide QTY on cone | 52 pcs | Full cutter layout, fast assembly way of bit leg avoid heating problem of soldering, which extend lifetime of bearing. The application of engineering plate holder makes the construction more convenient and quick |
| Carbide QTY on Leg | 21 pcs | |
