E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 34/08 (2006.01)
Patent
CA 2384052
A safety valve for use in a wellbore formed in an earth formation, comprising a valve body (6) having a fluid passage for passage of a stream of hydrocarbon fluid flowing from the earth formation via the wellbore to the earth surface, a closure member (18) movable relative to the valve body between an open position in which the fluid passage (12) is open and a closed position in which the closure member closes the fluid passage, and an activating device (30) for selectively subjecting the closure member (18) to a drag force of selected magnitude, the drag force being exerted by the stream of fluid and inducing the closure member to move from the open position to the closed position thereof. The safety valve further comprises control means (46) for controlling the activating device to subject the closure member to said drag force.
L'invention concerne une soupape de sécurité destinée à un forage pratiqué dans une formation souterraine. Cette soupape comprend un corps (6) qui comporte un conduit pour fluide permettant le passage d'un hydrocarbure fluide s'écoulant hors de la formation en direction de la surface terrestre en passant par le puits de forage, un élément de fermeture (18) pouvant être déplacé par rapport au corps de soupape entre une position ouverte, et une position fermée dans laquelle l'élément de fermeture obture le conduit de fluide, et un dispositif (30) d'activation permettant de soumettre sélectivement l'élément de fermeture (18) à une force de frottement d'une amplitude sélectionnée, exercée par l'écoulement du fluide, et provoquant le déplacement de l'élément de fermeture de la position ouverte à la position fermée. Cette soupape de sécurité comprend en outre des moyens de commande (46) permettant de commander le dispositif d'activation afin d'exposer l'élément de fermeture à ce frottement.
Shell Canada Limited
Smart & Biggar
LandOfFree
Downhole safety valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Downhole safety valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Downhole safety valve will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1815435