Drill Collar （HDD Drilling）
Drill Collar
| No | Description | Thread Type |
| 1 | 32T Drill collar ( Pin / Pin) | NC23/NC26 |
| 2 | 32T Drill collar ( Pin / Box ) | NC26/NC23 |
| 3 | 40T Drill collar ( Pin / Pin) | Customized |
| 4 | 40T Drill collar ( Pin / Box ) | Customized |
| 5 | 42T Drill collar ( Pin / Pin) | Customized |
| 6 | 42T Drill collar ( Pin / Box ) | Customized |
| 7 | 45T Drill collar | Customized |
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