Hydraulic packer with thermal isolation member

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/126 (2006.01) F16L 55/11 (2006.01) F16L 55/128 (2006.01)

Patent

CA 2674823

A technique facilitates use of a hydraulically actuated packer in a high temperature, downhole environment. The packer is actuated by directing pressurized fluid to the packer and routing the fluid to an actuation region of the packer to provide the force for setting the packer. A thermal isolation member is positioned in the packer along the pressurized fluid flow path and activates upon exposure to heat. Once the thermal isolation member is fully activated, flow is blocked along the pressurized fluid flow path which prevents return flow of pressurized fluid.

Une technique facilite l'utilisation d'une garniture d'étanchéité à commande hydraulique dans un environnement de fond de trou à température élevée. Cette garniture est mise en action en dirigeant un fluide sous pression vers la garniture et en acheminant le fluide jusqu'à une zone de mise en action de la garniture pour fournir la force de mise en place de ladite garniture. Un élément d'isolation thermique est placé dans la garniture, dans le trajet d'écoulement du fluide sous pression et cet élément se met en action lorsqu'il est exposé à la chaleur. Une fois l'élément d'isolation thermique complètement mis en action, l'écoulement est bloqué dans le trajet du fluide sous pression, ce qui empêche un retour du fluide sous pression.

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