Distance holder with jet deflector

Details Distance holder with jet deflector Distance holder with jet deflector

E - Fixed Constructions

21

B

E21B 7/18 (2006.01)

Patent

CA 2680429

A distance holder (1) for connection to, and rotation with, a drill string (2) in an earth formation drilling device arranged to supply a jet of abrasive fluid for the purpose of providing a borehole (2) by removing earth formation material through abrasion, comprises a chamber (16) which is essentially rotational symmetric and which is to face the earth formation material, and a jet nozzle (S) arranged for discharging a jet of the abrasive fluid in said chamber. The chamber comprises a deflector (12) positioned in the path of the fluid jet discharged from the jet nozzle.

L'invention concerne une pièce d'écartement (1) destinée à être raccordée et à pivoter avec un train de tiges de forage (2) dans un dispositif de forage de formation terrestre, qui est disposée de manière à produire un jet de fluide abrasif pour constituer un trou de forage (2) par élimination du matériau de formation terrestre par abrasion, et qui comprend une chambre (16) qui est esssentiellement à symétrie de révolution et qui est opposée au matériau de formation terrestre, ainsi qu'une buse (6) disposée pour libérer un jet du fluide abrasif dans ladite chambre. La chambre comprend un déflecteur (12) positionné sur le parcours du jet de fluide libéré par la buse.

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