Annulus isolation valve

Details Annulus isolation valve Annulus isolation valve

E - Fixed Constructions

21

B

E21B 34/02 (2006.01)

Patent

CA 2734871

An annulus isolation valve comprises a valve actuation bore and a flow passage capable of providing fluid communication between an upper annulus and a lower annulus. The flow passage comprises a first flow path and a portion of the valve actuation bore. Further, the first flow path has a second longitudinal axis that is different from a first longitudinal axis. The annulus isolation valve further includes a plug gate positioned in the valve actuation bore. The plug gate is configured so that in the open position it allows fluid communication between the upper annulus and the lower annulus. The annulus isolation valve further includes a biasing mechanism positioned in the valve actuation bore. The biasing mechanism is capable of forcing the plug gate into the closed position when the actuation force is not applied.

La vanne disolement despaces annulaires qui fait lobjet de cette invention comprend un trou dactionnement de vanne et un passage découlement permettant la communication fluidique entre un espace annulaire supérieur et un espace annulaire inférieur. Ledit passage découlement se compose dune première voie de passage découlement et dune partie du trou dactionnement de vanne. De plus, la première voie de passage découlement possède un second axe longitudinal qui est différent du premier. La vanne disolement despaces annulaires comporte également un bouchon qui est placé dans le trou dactionnement de vanne et qui permet, lorsquil est ouvert, la communication fluidique entre lespace annulaire supérieur et lespace annulaire inférieur. La vanne disolement despaces annulaires inclut aussi un mécanisme de sollicitation qui est installé dans le trou dactionnement de vanne et qui peut forcer le bouchon à se fermer lorsque la force dactionnement nest pas appliquée.

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