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 tripping out. The technical parameters for elevator groove and slip groove are as API Spec7-1. Hardbanding is optional at customers’ requests.
| Design | O | D | ID | Length | Chamfer Diameter |
|---|---|---|---|---|---|
| in | mm | +1.6-0.0mm | +152.4mm | +0.4mm | |
| NC23-31 | 3 1/8 | 79.4 | 31.8 | 9.15 | 76.2 |
| NC26-35 | 3 1/2 | 88.9 | 38.1 | 9.15 | 82.9 |
| NC31-41 | 4 1/8 | 104.8 | 50.8 | 9.159.45 | 100.4 |
| NC35-47 | 4 3/4 | 120.7 | 50.8 | 9.159.45 | 114.7 |
| NC38-50 | 5 | 127.0 | 57.2 | 9.159.45 | 121.0 |
| NC44–60 | 6 | 152.4 | 57.2 | 9.159.45 | 144.5 |
| NC44–60 | 6 | 152.4 | 71.4 | 9.159.45 | 144.5 |
| NC44-62 | 6 1/4 | 158.8 | 57.2 | 9.159.45 | 149.2 |
| NC44-62 | 6 1/4 | 158.5 | 71.4 | 9.159.45 | 150.0 |
| NC46-65 | 6 1/2 | 165.1 | 57.2 | 9.159.45 | 154.8 |
| NC46-65 | 6 1/2 | 165.1 | 71.4 | 9.159.45 | 154.8 |
| NC46-67 | 6 3/4 | 171.5 | 57.2 | 9.159.45 | 159.5 |
| NC50-70 | 7 | 177.8 | 57.2 | 9.159.4 | 164.7 |
| NC50-70 | 7 | 177.8 | 71.4 | 9.159.45 | 164.7 |
| NC50-72 | 7 1/4 | 184.2 | 71.4 | 9.159.45 | 169.5 |
| NC56-77 | 7 3/4 | 196.9 | 71.4 | 9.159.45 | 185.3 |
| NC56-80 | 8 | 203.2 | 71.4 | 9.159.45 | 190.1 |
| 6 5.8REG | 8 1/4 | 209.6 | 71.4 | 9.159.45 | 195.7 |
| NC61-90 | 9 | 228.6 | 71.4 | 9.159.45 | 212.7 |
| 7 5/8REG | 9 1/2 | 241.3 | 76.2 | 9.159.45 | 223.8 |
| NC70-97 | 9 3/4 | 247.7 | 76.2 | 9.159.45 | 232.6 |
| NC70-100 | 10 | 254.0 | 76.2 | 9.159.45 | 237.3 |
| 8 5/8REGc | 11 | 279.4 | 76.2 | 9.159.45 | 266.7 |
