Dual Wall Drill Pipe
HDD dual wall drill pipe is consisted of inner and outer pipes. During working, water or mud is delivered through the internal cavity of the inner pipe. The outer drill pipes are connected with screw thread, and the inner pipes are linked together with hexagonal pin and box connectors. In the time-sharing driving process, the inner and outer pipes convert into a shift mode to deliver the torque independently.
Caston provides custom drill pipes upon clients' request.
Technical Parameters| Model | KT-SZ073 | KT-SZ076 | KT-SZ080 | KT-SZ089 | KT-SZ114 |
| Specification | Φ73×9.35 | Φ76×10 | Φ83×9 | Φ89×9.35 | Φ114×9.19 |
| Tubing joint | NC26 | NC26 | D80 | NC31 | NC46 |
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