Liquid driven impact device

Details Liquid driven impact device Liquid driven impact device

E - Fixed Constructions

21

B

E21B 4/14 (2006.01) E21B 21/00 (2006.01)

Patent

CA 2283447

Liquid driven impact device provided with a housing (1) and a hammer piston (2) movable to-and-fro therein. The hammer piston is provided with channels (8) which when the hammer piston (2) passes the impact position supplies pressure liquid to a valve body (9) for locking this for continuous supply of pressure liquid to a first surface (4) on the hammer piston (2) and to a flushing channel (6) for continuous flushing of a drill hole.

Dispositif de percussion entraîné par du liquide comprenant un carter (1) et un piston percuteur (2) pouvant se déplacer avec un mouvement de va-et-vient dans ce dernier. Le piston-percuteur est pourvu de canaux (8) qui servent, lorsque le piston percuteur passe en position de percussion (2), à envoyer du liquide sous pression à un corps (9) de soupape pour verrouiller ce dernier afin d'apporter en continu du liquide sous pression sur une première surface (4) située sur le piston percuteur (2) et à un canal (6) de lavage pour laver en continu un trou de forage.

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