Flushed rock drill

Details Flushed rock drill Flushed rock drill

E - Fixed Constructions

21

B

E21B 10/36 (2006.01) E21B 4/14 (2006.01) E21B 17/00 (2006.01)

Patent

CA 2430513

A rock drill includes a liquid-flushed, pot-shaped drilling head axially movable, within predetermined limits, relative to the drill rod which forms a piston that defines, together with an inner surface of the drilling head, a variable volume filling chamber, and at least one hydrodynamical narrow opening for filling the filling chamber with fluid,

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