Double wall drill pipe consist of two layers (known as the inner tube and the outer tube). The inner tube and outer tube can make a ring gap, which will be the channel that can transport medium to pump when sampling. In addition, the outer tube can protect the inner tube from corrosion in a short time, because of which the cost can be decreased.
Drill rods for HDD machine. High strength, high tenacity, high elasticity. Dia from 42mm to 140mm. Length from 0.5m to 9.6m. Steel grade: E75/R780,G105,S135 We can make the drill rods for Vermeer,Case,Ditch Witch, Drillto, Gudeng, Xugong HDD machines, such as D16X20, D24X40, D50X100, D75, D80, D100, D130, JT1720, JT2720, JT2720 March I, JT4020, JT7020, API NC23-NC50, etc.
| Model | OD | ID | Tool Joint OD(mm) | Thread Type | Length(m) |
| 114 | 114 | 65 | 156 | 4IF | 6 |
| 127 | 127 | 76 | 162/168 | 4-1/2IF | 6,9.5 |
| 127 | 127 | 76 | 184 | 5-1/2FH | 9.5 |
| 140 | 139.7 | 88 | 184 | 5-1/2FH | 6,9.5 |
| 219 | 219 | 130 | 240 |
| 6,9.5 |
HDD Machine Double Wall Drill Rod
