Sand control screen assembly having an adjustable flow rate...

E - Fixed Constructions – 21 – B

Patent

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E21B 43/08 (2006.01) E21B 34/14 (2006.01) E21B 43/04 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2195712

An adjustable flow rate screen assembly and associated methods of completing a subterranean well provide variable flow rates through downhole sand control screens without restricting access to the well and without requiring overly restrictive screens to be utilized in gravel packing operations. In a preferred embodiment, a screen assembly has a tubular restrictor housing with a flow passage formed thereon, a tubular ported housing having ports formed radially therethrough and providing fluid communication with the flow passage, and a tubular selector sleeve with an opening formed radially therethrough and permitting fluid communication with a selected one of the ports.

Un ensemble de filtrage à débit réglable et des méthodes associées de complétion d'un puits souterrain permettent des débits variables grâce à des filtres à sable en fond de puits sans qu'en soit restreint l'accès au puits et sans qu'il soit nécessaire d'utiliser des filtres trop restrictifs dans les cas où l'on fait usage de couronnes de gravier. Dans une version préférée, un ensemble de filtrage comporte un logement tubulaire restricteur avec un passage d'écoulement qui y est formé, un logement tubulaire à orifices, les orifices y étant disposés radialement et permettant la communication fluide avec le passage d'écoulement, et un manchon sélecteur avec une ouverture qui y est pratiquée radialement et qui permet la communication fluide avec l'orifice choisi.

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