We provide a full range of slick and spiral drill collors manufactured in AISI 4145H - modified steel, Sour Service and non-magnetic alloys, Drill collars are available with the following features:
- ODs from 8 7/8" to 2 7/8"
- Slick Or spiral
- Mechanical properties guaranteed to 1" below the steel's surface at ambient temperature.
- Enhanced fatique resistance (threads cold rolled, pin - relief groove and box bore back for API connections)
- Phosphate-coated threads to prevent galling
- Slip Elevator recess
- API stress - relief and bore back