Downhole safety valve apparatus and method

Details Downhole safety valve apparatus and method Downhole safety valve apparatus and method

E - Fixed Constructions

21

B

E21B 34/10 (2006.01)

Patent

CA 2583443

The application discloses a valve, which may include either a safety valve or a storm surge choke valve or the like, to isolate a zone below a valve from a string of production tubing. Preferably, the valve includes a flow interruption surface assembly, such as a flapper valve or a ball valve, displaced by an operating conduit extending from a surface location to the valve through the inside of the production tubing. The application also discloses a bypass-conduit inside the production tubing to allow communication from a surface location to the production zone when the valve is in either an open or a closed location.

L'invention concerne une vanne pouvant comprendre soit une vanne de sécurité, soit un étrangleur d'onde d'agitation ou analogue, aux fins d'isolation d'une zone inférieure à la vanne d'une chaîne de tubage de production. La vanne comprend, de préférence, un ensemble de surface d'interruption d'écoulement, tel qu'une soupape à languette ou une soupape à bille, déplacé au moyen d'un conduit fonctionnel s'étendant à partir d'un emplacement de surface vers la vanne à l'intérieur du tubage de production. L'invention concerne également un conduit de dérivation à l'intérieur du tubage de production, de manière à permettre d'établir une communication d'un emplacement de surface à la zone de production quand la vanne est dans un emplacement ouvert ou fermé.

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