A device in a subsea system for controlling a hydraulic...

E - Fixed Constructions – 21 – B

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Details

E21B 34/10 (2006.01) E21B 33/035 (2006.01)

Patent

CA 2384661

The invention relates to a device in a subsea system for controlling a hydraulic actuator (1) which is connected to a supply line (2) for supply of a supply fluid to the actuator (1) and a return line (3) for removal of a return fluid from the actuator. The device (10) comprises a housing (11) and a body (29) which is movable in the housing (11), which together define a high-pressure chamber (14), which communicates with the supply line (2), and a low-pressure chamber (15), which communicates with the return line (3), and whose volume is a function of the pressure of the return fluid and the supply fluid. The invention further relates to a subsea system comprising such a hydraulic actuator (1) and a device (10). The invention is particularly applicable for the operation of subsea process valves.

La présente invention concerne un dispositif de système sous marin permettant de commander un dispositif de commande (1) hydraulique connecté à une ligne d'alimentation (2) destinée à alimenter en fluide ce dispositif de commande (1) et à une ligne de retour (3) destinée à retirer un fluide de retour de ce dispositif de commande. Le dispositif (10) de l'invention comprend une enveloppe (11) et un corps (29) qui peut se déplacer dans l'enveloppe (11), et qui définissent tous les deux une chambre de haute pression (14), qui communique avec la ligne d'alimentation (2), et une chambre de basse pression (15), qui communique avec la ligne de retour (3), et dont le volume dépend de la pression du fluide de retour et du fluide d'alimentation. Cette invention concerne aussi un système sous marin qui comprend ce dispositif (1) de commande hydraulique sous marin et un dispositif (10). Cette invention convient particulièrement pour le fonctionnement des vannes du processus sous marin.

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