Improved surface controlled subsurface safety valve downstop...

Details Improved surface controlled subsurface safety valve downstop... Improved surface controlled subsurface safety valve downstop...

E - Fixed Constructions

21

B

E21B 34/12 (2006.01) E21B 34/10 (2006.01) E21B 34/00 (2006.01)

Patent

CA 2329317

In a broad aspect, the invention relates to an improved downstop seal (100) for use with a rod-piston actuator (40) of a surface controlled subsurface safety valve (10) wherein the rod-piston actuator (40) has a beveled shoulder (160) formed thereon. The improved downstop seal (100) has a resilient, primary, sealing member (110) having a beveled sealing surface to matingly engage with a portion of the beveled shoulder of the rod-piston actuator (40); and further has a non-resilient, secondary, sealing member (120) having a beveled sealing surface to matingly engage with a portion of the beveled shoulder (160) of the rod-piston actuator.

Dans une large mesure, l'invention concerne un joint amélioré (100) d'arrêt par abaissement destiné à être utilisé en combinaison avec un actionneur à tige-piston (40), pour une valve de sécurité (10) de subsurface commandée depuis la surface. L'actionneur en question comporte un épaulement biseauté (160). Le joint amélioré (100) comprend un premier élément d'étanchéité souple (110) doté d'une surface de fermeture biseautée qui coïncide avec une partie de l'épaulement biseauté de l'actionneur (40), et il comprend un second élément d'étanchéité (120) qui n'est pas souple, doté d'une surface de fermeture biseautée coïncidant également avec une partie de l'épaulement biseauté (160) du même actionneur.

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