Product Description
Elevator groove and slip groove made on box thread face of slick drill collar or spiral drill collar can be used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API spec 7-1. Hard banding is optional at customers request.
| Drill collar ranges O.D. (mm) | Elevator groove depth(mm) | Elevator groove length(mm) | Slip groove depth(mm) | Slip groove length(mm) |
| 101.6-117.5 | 5.6 | 4.8 | 406 | 457 |
| 120.6-142.9 | 6.4 | 4.8 | 406 | 457 |
| 146.0-168.3 | 7.9 | 6.4 | 406 | 457 |
| 171.4-219.1 | 9.5 | 6.4 | 406 | 457 |
| ≥222.2 | 11.1 | 6.4 | 406 | 457 |