Entrainment fluid channeling device for a down-hole drill...

E - Fixed Constructions – 21 – B

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E21B 4/00 (2006.01) E21B 7/08 (2006.01) E21B 10/12 (2006.01) E21B 10/60 (2006.01) E21B 17/18 (2006.01) E21B 19/00 (2006.01) E21B 21/00 (2006.01)

Patent

CA 2571358

A fluid channeling device (10) is for a down-hole drill assembly (1) having a central axis (1c) and advanceable into a hole in a downward direction (D) along the axis (1c). The assembly (1) includes a drill member (2) with an inner surface (2a) bounding a central bore (2b) and an outer surface (2c). The channeling system includes at least one passage (12) provided within the drill member (2) so as to extend generally between the drill member inner (2a) and outer surfaces (2c). A generally annular channeling member (14) is disposeable about a portion of the drill member (2) and has at least one inlet port (20), at least one discharge port (16), and a passage (12) extending between the inlet (20) and discharge ports (16). The inlet port (20) is fluidly connectable with the drill member passage (12) to fluidly couple the central bore (2b) with the discharge port (16). The discharge port (16) is configured to direct fluid generally externally of the drill assembly (1) and generally in an upward direction (U) along the axis (1c).

L'invention concerne un dispositif de cheminement de fluide (10) destiné à un ensemble marteau de fond de trou (1) ayant un axe central (1c) et pouvant s'avancer dans un trou dans une direction descendante (D) le long de l'axe (1c). L'ensemble (1) comprend un élément foret (2) ayant une surface interne (2a) reliant un orifice central (2b) et une surface externe (2c). Le système de cheminement comprend au moins un passage (12) situé dans l'élément foret (2) de manière à s'étendre généralement entre la surface interne (2a) et la surface externe (2c) de l'élément foret. Un élément cheminement (14) généralement annulaire peut être disposé autour d'une partie de l'élément foret (2) et a au moins un trou d'entrée (20), au moins un orifice de décharge (16) et un passage (12) s'étendant entre l'entrée (20) et les orifices de décharge (16). L'orifice d'entrée (20) peut être en liaison fluidique avec le passage d'élément foret (12) pour coupler fluidiquement l'orifice central (2b) à l'orifice de décharge (16). L'orifice de décharge (16) est configuré de manière à diriger le fluide généralement à l'extérieur de l'ensemble foret (1) et généralement dans une direction ascendante (U) le long de l'axe (1c).

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