Device for channeling solids and fluids within a reverse...

E - Fixed Constructions – 21 – B

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E21B 21/10 (2006.01) E21B 1/00 (2006.01) E21B 49/02 (2006.01)

Patent

CA 2654461

A device is for channeling solids and fluids within a reverse circulating, fluid operated drill (1) that has first and second ends (1a, 1b), an axis extending between the ends, a casing (2) and a piston (3). The casing (2) has a bore (2a) extending between the drill ends and drive (Cd) and valve (Cv) chambers defined within the bore, the piston being movably disposed within the bore. The channeling device includes an elongated body (12) disposeable within the casing bore so as to extend along the casing axis and through the piston. The body has a longitudinal axis, a first end (12a) locatable proximal to the drill first end, and a second end (12b) spaced from the first end and locatable proximal to the drill second end. A material transport passages (14) extends axially between the two body ends and provides a path for moving solid materials through the drill. A fluid passage (24) is configured to couple the valve and drive chambers.

L'invention concerne un dispositif d'acheminement de matières solides et de liquides à l'intérieur d'un trépan hydraulique à circulation inverse comprenant une première et une seconde extrémité délimitant un axe, un gainage et un piston. Le gainage présente un trou qui s'étend entre les extrémités du trépan et des boîtes de soupape et de transmission délimitées à l'intérieur du trou logeant le piston mobile. Le dispositif d'acheminement comprend un corps allongé qui se place à l'intérieur du trou du gainage de façon à s'étendre le long de l'axe du gainage et à travers le piston. Le corps présente un axe longitudinal, une première extrémité localisable à proximité de la première extrémité du trépan et une seconde extrémité distante de la première extrémité et localisable à proximité de la seconde extrémité du trépan. Des passages de transport des matières s'étendent axialement entre les deux extrémités du corps, et créent un chemin permettant de déplacer les matières solides à travers le trépan. Un passage des liquides est ménagé pour coupler les boîtes de soupape et de transmission.

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