Drill-stem rotation is ordinary means that the rotary table drives the kelly in petroleum, nature gas,geological exploration and drilling engineering. In some conditions,for example, the kelly is not in the rotary table, the drillpipe rotary tool in parts is necessary uesd to drive the kelly.
Technical parameters and specifications
| Drill pipe(in) |
Max Torque |
| 5 1/2＂ |
60KN・M |
| 5＂ |
60KN・M |
| 4 1/2＂ |
60KN・M | |
