Well bore isolation using tool with sliding sleeve

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/124 (2006.01) E21B 34/14 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2654447

An apparatus and method for isolating a portion of a well bore and providing pressurized fluid thereto includes an upper packer, a lower packer, and a sliding sleeve between them. A seat is defined at the open bottom end of the lower sleeve and a sealing element is configured to seal the seat. A bias force urges the sliding sleeve toward a closed position. The apparatus moves along the bore and the lower packer is set at a desired location, and then an opening force is exerted on the tubing to move the sliding sleeve to the open position. After the lower packer is set and the sliding sleeve is open, the upper packer is set to isolate a portion of the well bore between the packers with the sliding sleeve in the open position to provide a flow path from the tubing string to the formation between the packers.

Appareil et procédé permettant d=isoler une partie d'un puits de forage et d=y fournir un fluide pressurisé qui comprend une garniture d=étanchéité supérieure, une garniture d=étanchéité inférieure, et un manchon coulissant entre eux.Un siège est défini à l'extrémité inférieure ouverte en bas du manchon et un élément d=étanchéité est configuré pour sceller le siège. Une force de polarisation pousse le manchon coulissant vers une position fermée. L'appareil se déplace le long de l'alésage et la garniture d=étanchéité inférieure est fixée à l=emplacement souhaité, et alors une force d'ouverture est exercée sur le tube de production pour déplacer le manchon coulissant vers une position ouverte. Après l=installation de la garniture d=étanchéité inférieure et l=ouverture du manchon coulissant, la garniture d=étanchéité supérieure est fixée pour isoler une partie du puits de forage entre les garnitures d=étanchéité avec le manchon coulissant en position ouverte pour fournir un passage d'écoulement à partir du tube de production à la formation entre les garnitures d=étanchéité.

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