Mechanical sliding sleeve

Details Mechanical sliding sleeve Mechanical sliding sleeve

E - Fixed Constructions

21

B

E21B 34/14 (2006.01)

Patent

CA 2653254

A mechanical sliding sleeve includes a sleeve housing defining a fluid communication port, a first sub affixed to the sleeve housing, and a second sub affixed to the sleeve housing. An isolation sleeve is disposed in an internal bore defined by the sleeve housing, the first sub, and the second sub, and defines a fluid communication port. The isolation sleeve is slidable along interfaces between the first sub, the second sub, and the sleeve housing between an open position, wherein fluid is allowed through the ports, and a closed position, wherein fluid passage through the ports is inhibited. A sealing element is operably associated with the sleeve housing, the first sub, the second sub, and the isolation sleeve to inhibit fluid flow through the ports unless the isolation sleeve is in the open position, and to seal at least a portion of the interfaces from contact with downhole fluids.

Un manchon coulissant mécanique comprend un corps de manchon déterminant un orifice de communication fluide, un premier raccord double femelle fixé au corps du manchon, et un second raccord double femelle fixé au corps du manchon. Un manchon isolant est placé dans un alésage défini par le corps du manchon, le premier raccord double femelle et le second raccord double femelle, et ledit manchon détermine un orifice de communication fluide. Le manchon isolant peut coulisser sur des éléments de liaison entre le premier raccord double femelle. le second raccord double femelle et le corps du manchon, entre la position ouverte dans laquelle le fluide peut passer par les orifices, et la position fermée dans laquelle le passage du fluide à travers les orifices est bloqué. Un élément d'étanchéité est associé fonctionnellement au corps du manchon, au premier raccord double femelle, au second raccord double femelle et au manchon isolant, pour empêcher l'écoulement du fluide à travers les orifices, à moins que le manchon isolant soit en position ouverte, et d'isoler au moins une partie des éléments de liaison de tout contact avec les fluides de fond de trou.

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