Pneumatic impact piercing tool

Details Pneumatic impact piercing tool Pneumatic impact piercing tool

E - Fixed Constructions

21

B

E21B 1/24 (2006.01) E21B 10/36 (2006.01)

Patent

CA 2660101

A reversible, pneumatic ground piercing tool has a tail assembly with exhaust passages therethrough. At least a potion of each exhaust passage angles radially inwardly and ends in discharge ports that communicate with a central hole at the rear end of the tail assembly, whereby exhaust escapes through the central hole. A tail cone has a radially inwardly extending flange on the inner periphery of the central hole, which flange is rearwardly spaced from and covers the discharge ports.

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