Shear open valve

Details Shear open valve Shear open valve

E - Fixed Constructions

21

B

E21B 43/12 (2006.01) E21B 34/10 (2006.01)

Patent

CA 2699112

The present invention regards a device designed for injection of fluids in a well bore, typically an offshore well bore for petroleum production and gas injection / gas lift system for fluid injection. The device comprises a outer hollow housing (1) with an internal body (3) moveable within the outer housing (1) which in a first closed position is closed with a metal to metal seal system between the outer housing (1) and the internal body (3), which internal body (3) is operated by pressure differential across the internal body (3). The internal movable body (3) is connected to the outer hollow housing (1) by means of a retainer key (6). The retainer key (6) comprises a shear arrangement and is arranged to keep the valve in a fixed closed position, where fluid pressure is to overcome the pretension of the retainer key (6) in order to open the device. When the device is shear opened, it can be kept in this open position as the retainer key (6) is locked to the outer hollow housing (1).

La présente invention concerne un dispositif conçu pour l'injection de fluides dans un forage, généralement un forage en mer pour la production de pétrole, et un système d'injection/de poussée de gaz destiné à l'injection de fluides. Le dispositif comprend un boîtier creux externe (1) qui renferme un organe interne mobile (3) et qui, dans une première position fermée, est fermé avec un système d'étanchéité métal sur métal ménagé entre le boîtier externe (1) et l'organe interne (3), ledit organe interne (3) étant actionné par une différence de pression agissant sur lui. L'organe interne mobile (3) est relié au boîtier creux externe (1) au moyen d'une clavette de retenue (6) muni d'un mécanisme de cisaillement et qui est conçue pour maintenir la soupape dans une position fixe, la pression du fluide devant venir à bout de la prétension de la clavette de retenue (6) pour ouvrir le dispositif. Lorsque le dispositif est ouvert par cisaillement, il peut être maintenu dans cette position ouverte, la clavette de retenue (6) étant verrouillée au boîtier creux externe (1).

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