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Eccentric Drilling Tools with Casing Tube: pulled out directly or fixed at the bottom of the hole by means of cement grout or other agglutinants. 4. Drilling continues to the desired depth using conventional DTH equipment. 3'' ...

Symmetric Drilling Tools with Casing Tube: Symmetric Drilling Tools with Casing Tube Retrievable Symmetric Drilling tools with csing tube step-by-step: 1. When the drilling starts, the central bit drive the ring bit down the hole, meanwhile ...

3'' TND DTH Hammers for DHD3.5,Mission30, Wooke 30: 3'' TND DTH Hammers for DHD3.5, Mission30, Wooke30 Hole Range: ø90-ø105 Work Pressure: 8-30 bar Air consumption: 10bar - 4.5m3/min 18bar - 9.5m3/min 24bar - 12.5m3/min Impact rate at ...

8'' TND DTH Hammers for DHD380, Mission80,QL80, SD8, WOOKE80: 8'' TND DTH Hammers for DHD380, Mission80, QL80, SD8, WOOKE80 Hole Range: ø194-ø305 Work Pressure: 8-30 bar Air consumption: 10bar - 12m3/min 18bar - 26m3/min 24bar - 35m3/min Impact rate at ...

6'' TND DTH Hammers for DHD360, Mission60, QL60, COP64, SD6, WOOKE60: pulling out the hammer, the last impact of the piston would fall on the step of piston case, ensuring the safety of the driver sub splines and the retainer ring. In order to increase working life of ...

5'' TND DTH Hammers for DHD350, Mission50, QL50, COP54, SD5, WOOKE50: pulling out the hammer, the last impact of the piston would fall on the step of piston case, ensuring the safety of the driver sub splines and the retainer ring. In order to increase working life of ...

4'' TND DTH Hammers for DHD340, Mission 40, QL40, COP44, SD4, WOOKE40: pulling out the hammer, the last impact of the piston would fall on the step of piston case, ensuring the safety of the driver sub splines and the retainer ring. In order to increase working life of ...

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Eccentric Drilling Tools with Casing Tube