Double rod cylinder feed system

Details Double rod cylinder feed system Double rod cylinder feed system

E - Fixed Constructions

21

B

E21B 19/00 (2006.01) E21B 19/084 (2006.01)

Patent

CA 2100411

A hydraulic system for moving a drilling head in a rectilinear motion between a mast crown and a mast table on a drilling machine includes a double rod hydraulic cylinder connected at a bottom end to a mast table and at a top end to a traveling sheave block; first and second flexible connector members for connecting a drilling head to the mast through the sheave block; and hydraulic feed circuitry for actuating the cylinder to move the sheave block and drilling head alternately in a first pulldown direction and in a second pullback direction.

Système hydraulique servant à déplacer une tête de forage selon un mouvement rectiligne, entre le sommet d'un mât et le socle d'un mât sur une machine de forage et comprenant un cylindre hydraulique à deux tiges raccordées à leur extrémité inférieure à un socle de mât, et, à leur extrémité supérieure, à un palan; et comprenant un circuit hydraulique pour actionner le cylindre afin de déplacer le palan et la tête de forage dans un mouvement alternatif dans une première direction d'enfoncement et dans une deuxième direction de rappel.

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