An erectable arm assembly for use in boreholes

Details An erectable arm assembly for use in boreholes An erectable arm assembly for use in boreholes

E - Fixed Constructions

21

B

E21B 7/08 (2006.01) E21B 7/06 (2006.01) E21B 7/18 (2006.01)

Patent

CA 2292639

An erectable arm assembly (14) for use in a borehole, the erectable arm assembly comprising a main body (20) and an arm member (22), the arm member being able to move between a collapsed position in which the assembly can be removed from the borehole and an erected position, the erectable arm assembly being adapted to house a fluid drilling assembly comprising a fluid cutting device (16) and a flexible hose drill string such that the arm member during erection can contain at least part of the fluid drilling assembly, and when in the erected position the arm member is able to guide the fluid cutting device towards the borehole wall, the assembly further including at least one sensor for monitoring the arm member or the fluid drilling assembly.

L'invention concerne un ensemble à bras déployable (14) à utiliser dans un trou de forage, et comprenant un corps principal (20) et un élément bras (22) capable de se mouvoir entre une position repliée dans laquelle ledit ensemble peut être enlevé du trou de forage et une position déployée, ledit ensemble étant conçu pour recevoir un ensemble de forage par fluide comprenant un dispositif de coupe par fluide (16) et un train de tiges de forage à flexible de sorte que l'élément bras puisse, pendant le déploiement, contenir au moins une partie de l'ensemble de forage par fluide, et lorsqu'il est en position déployée qu'il soit capable de guider le dispositif de coupe par fluide vers la paroi du trou de forage. Ledit ensemble comprend de plus au moins un capteur pour le contrôle de l'élément bras ou de l'ensemble de forage par fluide.

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