Home-> DTH Hammer & Bits -> Symmetric & Eccentric
Eccentric Drill Tools
Eccentric Drill Tools



Eccentric Drill Tools with case tube drilling step-by-step:

1,When drilling, the TGZ reamer swings out and drills a hole wide enough for the casing tube to slide down behind the reamer.

2,When required depth is reached, the drill is reversed and the reamer swings in, allowing the bit to pass through the casing.

3,Casing tubes that are to be left in the drill hole should be sealed at the bottom of the hole by means of cement grout or some other sealing agent.

4,Drilling continues to the desired depth using conventional DTH equipmnet.