- Spiral Drill Collar
- 2017-01-14 07:39
- Spiral drill collar is one kind of our product series. It’s processed with three right-hand spiral grooves on the outer
- Non-magnetic Drill Collar
- 2017-01-14 07:39
- It’s made from N1310 low carbon alloy-steel, refined and forged by strict chemical analysis to reach its mechanical pro
- Square Kelly
- 2017-01-14 07:39
- Kelly is on the top of drill stem, transmitting torque and supporting drill stem’s suspension weight. It’s the drive s
- Hexagonal Kelly
- 2017-01-14 07:39
- Kelly is on the top of drill stem, transmitting torque and supporting drill stem’s suspension weight. It’s the drive s
- drill collar
- 2017-01-14 07:39
- Description: It’s made from rolled or forged AISI4145H chrome-molybdenum steel. The content of chemical composition and
- Drill Pipe
- 2017-01-14 07:39
- Drill pipe is the basic part of drill stem, used for deepening well bore, transmitting the torque and shaping the recirc