Horizontal tree safety valve

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 34/04 (2006.01) F16K 17/04 (2006.01) E21B 34/00 (2006.01)

Patent

CA 2179601

A safety valve for use with horizontal subsea trees as described which uses a two-part (10, 12) safety valve system. The first part (10) containing a valve mechanism (16, 18, 22, 26) remains in the wellhead and is normally biased to a closed position. The valve mechanism (16, 18, 22, 26) remains in the wellhead at all times during production and can be actuated to an open position by latching in a second part (12) which contains control cables (58) and a moveable valve actuator (62, 70, 40, 26) operable from the surface during workover to actuate the valve (18) in the wellhead portion (10) open. This provides for greater safety during the workover phase in comparison to a wire set plug and also allows safer re-entry to the well.

Soupape de sûreté destinée à être utilisée avec des arbres sous-marins et employant un système de soupape de sûreté en deux parties (10, 12). La première partie (10) qui contient un mécanisme de soupape (16, 18, 22, 26) reste dans la tête de puits et est normalement sollicitée en position fermée. Ledit mécanisme de soupape (16, 18, 22, 26) reste en permanence dans la tête de puits pendant la production et peut être actionné en position ouverte en s'enclenchant dans une deuxième partie (12) qui contient des câbles de commande (58) et un actionneur de soupape mobile (62, 70, 40, 26) qui peut être commandé depuis la surface pendant les travaux de complètement pour actionner la soupape (18) en position ouverte dans la partie (10) de tête de puits. Ceci assure une meilleure sécurité pendant la phase de complètement qu'un tampon à câble et offre une plus grande sécurité pour entrer à nouveau dans le puits.

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