Apparatus and method of loading a rod box for a horizontal...

E - Fixed Constructions – 21 – B

Patent

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E21B 7/04 (2006.01) E21B 19/15 (2006.01)

Patent

CA 2692880

A biased door member is provided in an external wall of a drill rod supply magazine mounted on a horizontal directional drilling (HDD) machine. The door member swings inwardly from a first position parallel to the external wall to a second position within the distal column. At least one cut-out is formed in the external wall at the bottom of the retaining guides located at the longitudinal ends of the magazine. The cut-out creates a window through which the added drill rod is inserted. In operation, a drill rod is moved through the biased door member and window cut-outs into the distal column. The pocket of a rod transfer mechanism is positioned below the last column, and a rod lifter lowers the added drill rod into the pocket. The rod transfer mechanism then moves the added drill rod into alignment with the drill string.

L'invention concerne un organe formant porte sollicité disposé dans une paroi externe d'un magasin débiteur de tige de forage monté sur une machine de forage directionnel horizontal (HDD). L'organe formant porte bascule vers l'intérieur d'une première position parallèle à la paroi externe à une seconde position dans la colonne distale. Au moins une découpe est formée dans la paroi externe au fond des guides de retenue situés au niveau des extrémités longitudinales du magasin. La découpe crée une fenêtre à travers laquelle la tige de forage ajoutée est insérée. En fonctionnement, une tige de forage est déplacée à travers l'organe formant porte sollicité et les découpes de fenêtre dans la colonne distale. La poche d'un mécanisme de transfert de tige est positionnée sous la dernière colonne, et un poussoir de tige abaisse la tige de forage ajoutée dans la poche. Le mécanisme de transfert de tige déplace alors la tige de forage ajoutée dans l'alignement du train de tiges de forage.

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