A hydraulic percussive in-hole rock drilling machine

Details A hydraulic percussive in-hole rock drilling machine A hydraulic percussive in-hole rock drilling machine

E - Fixed Constructions

21

B

E21B 4/14 (2006.01) B25D 9/00 (2006.01)

Patent

CA 2516476

A hydraulic drill string device can be in the form of a percussive hydraulic in-hole drilling machine that has a piston hammer (50) with an axial through hole (51) into which a tube (35) extends. The tube forms a channel for flushing fluid from a spool valve (62) and the tube wall contains channels (40) with ports (41,42) cooperating with the piston hammer for controlling the valve.

L'invention concerne un dispositif à train de forage hydraulique pouvant prendre la forme d'une machine de forage hydraulique fond-de-trou à percussion qui présente un marteau à piston (50) à trou axial (51) dans lequel s'étend un tube (35). Ledit tube constitue une voie d'écoulement de liquide depuis un tiroir cylindrique (62). La paroi de ce tube comporte des canaux (40) à accès (41,42) coopérant avec le marteau à piston pour la commande de valve.

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