The reverse circulation drill pipe (RC drill pipe) discharges rock debris directly from the surface through the central channel, achieving efficient slag discharge. It is suitable for loose formations and large-diameter drilling, with fast drilling speed and less pollution.
| 0 D | Thickness | Length | Thread | |
| inch | mm | mm | mm | Remet/Metzke/FH/IF |
| 31/2 | 89 | 6-10 | 1500--9500 | Remet/Metzke/FH/IF |
| 4 | 102 | 6-10 | 1500--9500 | Remet/Metzke/FH/IF |
| 41/4 | 108 | 6-10 | 1500--9500 | Remet/Metzke/FH/IF |
| 41/2 | 114 | 8-10 | 1500--9500 | Remet/Metzke/FH/IF |
| 5 | 127 | 8-10 | 1500--9500 | Remet/Metzke/FH/IF |
| 51/2 | 140 | 8-10 | 1500--9500 | Remet/Metzke/FH/IF |
| 7 | 178 | 8-10 | 1500--9500 | Remet/Metzke/FH/IF |
Efficient slag discharge: The central channel directly discharges rock debris, increasing drilling speed by more than 30%.
Strong geological adaptability: particularly suitable for drilling operations in loose and fragmented geological formations.
Good pollution control: reduce leakage of flushing solution and minimize disturbance to the pore wall.
Large caliber advantage: The supporting down the hole hammer can be used to drill holes of over 800mm.
Structural innovation: Double wall design achieves reverse circulation of airflow/liquid flow.
Energy saving and consumption reduction: Compared with the same period last year, the positive circulation drilling rig saves 40% water and 25% electricity.
Efficient slag discharge: Rock debris is directly discharged to the surface, increasing drilling speed by more than 40%.
Super adaptability: Excellent performance in complex formations such as quicksand layers/fractured zones.
Energy saving and environmental protection: 50% water saving compared to the same period of positive circulation, reducing mud pollution.
Advantages of large aperture: Supports construction with super large apertures ranging from 200-2000mm.
Strong durability: Made of special alloy steel, the lifespan is extended by three times.
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