Downhole safety valve apparatus and method

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 34/10 (2006.01)

Patent

CA 2580629

The application discloses a safety valve including a flapper valve and a packer assembly to be installed in a bore to isolate a first zone from a second zone. Preferably, the safety valve includes a hydraulic conduit bypassing the flapper valve to allow communication therethrough when the valve is closed. Furthermore, the safety valve preferably allows unobstructed passage of tools and fluids therethrough when the flapper valve is open. The application discloses a method to install a safety valve in an existing string of tubing by deploying a packer assembly having an integral safety valve.

L'invention concerne une vanne de sécurité comprenant un clapet à battant et un ensemble de garniture d'étanchéité destinés à être installés dans un puits pour isoler une première zone d'une seconde zone. De préférence, cette vanne de sécurité comprend un conduit hydraulique évitant le clapet à battant pour permettre la communication lorsque la vanne est fermée. De préférence, cette vanne permet également le passage sans difficulté d'outils et de fluides lorsque le clapet à battant est ouvert. L'invention concerne également un procédé destiné à l'installation d'une vanne de sécurité dans une colonne de production existante, consistant à mettre en place un ensemble de garniture d'étanchéité comportant une vanne de sécurité intégrée.

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