Drill Collars 3-1/8” – 9-1/2” OD
- API rotary shouldered
- HI-TORQUE™ (HT™)
- eXtreme™ Torque (XT™)
- Delta™
- XT-M™
- CET
- EVRDRL™
- PTECH™
- PULSAR™
- Double Shoulder (DS)
DELTA™ I HI-TORQUE™ (HT™), eXtreme™ Torque (XT™) I XT-M™, Z140™, and V150™ are registered trademarks of National Oilwell Varco and its affiliates