Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.
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Down The Hole Mining Drill Pipe Drill Rod Friction Welding
Product description
Down th hole drill pipes play a significant role in all DTH drilling, regardless of application, rock type, hole depth or drill rig. The key features of a high quality DTH tube are durability, accuracy and manageability. Teamwhole DTH drill pipes are made of superior alloy and the both thread ends are friction welded to the seamless steel pipe.The high pressure air is delivered to DTH hammer by DTH drill pipe, simultaneously it transfers the rotation and press force to the DTH hammer.
| Outer Diameter (inch) | Outer Diameter (mm) | Wall thickness (mm) | Thread Pin/Box | Length (m) |
| 3” | 76 | 6~8.5 | API 2 3/8” reg | 1m-9m |
| 3.5” | 89 | 6.5~8.5 | API 2 3/8” reg | 1m-9m |
| 4” | 102 | 6.5~8.5 | API 3 1/2” reg | 1m-11m |
| 4.5” | 114 | 8.5~10 | API 3 1/2” reg | 1m-11m |
| 5” | 127 | 8.5~10 | API 3 1/2” reg | 1m-11m |
| 6” | 152 | 8.5~10 | API 4 1/2” reg | 1m-6m |
| 7” | 178 | 10 | API 4 1/2” reg | 1m-6m |
| 7 | 178 | 12.7 | API 4 1/2” reg | 1m-6m |