Expandable downhole tool

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 23/04 (2006.01) E21B 10/32 (2006.01) E21B 29/00 (2006.01)

Patent

CA 2442117

The present invention provides a down-hole tool (7) with at least one radially outwardly deployable tool element (33) for use in a bottom hole assembly (1) provided with a pressurised down-hole motor drive fluid supply (50). The tool (7) comprises a body (9) having at least one tool element (33) having a mounting, proximal, end portion (32) pivotally mounted (31) on said body, and a working, distal, end portion (34) displaceable between a stowed, radially inward, position and a deployed, radially outward, position. The proximal end portion (32) is provided with an engagement portion (29, 30) formed and arranged for driven engagement with a drive member (23) axially displaceable by a piston and cylinder device (19, 20). In use of the tool (7), axial displacement of the drive member (23) causes said proximal end portion (32) to rotate and displace said tool element working end portion (34) between said stowed and deployed positions thereof.

La présente invention concerne un outil de fond de puits (7) dont un élément d'outil est capable de déploiement radial vers l'extérieur (33). Cet outil est destiné à un ensemble de fond de puits (1) équipé d'une alimentation de fluide moteur pressurisé (50) pour moteur de fond de puits. L'outil (7) comprend un corps (9) pourvu d'un élément (33) disposant d'une extrémité proximale de montage (32) montée pivotante (31) sur ledit corps, et une extrémité distale active (34) mobile entre une position repliée radialement vers l'intérieur, et une position radialement déployée vers l'extérieur. L'extrémité proximale (32) est pourvue d'un élément d'engagement (29, 30) formé et agencé pour un engagement moteur avec un élément moteur (23) axialement mobile sous l'effet d'un dispositif de vérin (19, 20). Le principe de fonctionnement de l'outil (7) est que le déplacement axial de l'élément moteur (23) amène l'extrémité proximale (32) à tourner et à déplacer l'extrémité active de l'élément d'outil (34) entre sa position repliée et sa position déployée.

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