Positional control of downhole actuators

E - Fixed Constructions – 21 – B

Patent

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E21B 34/10 (2006.01)

Patent

CA 2637326

A method for positional control of an actuator includes: applying pressure to both an input line and an output line connected to the actuator and then releasing a predetermined volume of fluid from the output line, thereby displacing a piston of the actuator a corresponding predetermined distance. A system for positional control of an actuator includes the actuator included in a well tool positioned in a well; the input line connected to the actuator and extending to a remote location; the output line connected to the actuator and extending to the remote location; and a fluid volume measurement device connected to the output line at the remote location. The fluid volume measurement device is operative to meter the predetermined volume of fluid from the output line.

L~invention concerne la commande de la position d~actionneurs en fond de trou. L~invention concerne notamment un procédé de commande de la position d~un actionneur comprenant les étapes consistant à : mettre sous pression une conduite d~entrée et une conduite de sortie raccordées à l~actionneur ; puis libérer un volume prédéterminé de fluide de la conduite de sortie pour déplacer un piston de l~actionneur d~une distance prédéterminée correspondante. L~invention concerne en outre un système de commande de la position d~un actionneur, comportant l~actionneur monté dans un outil de puits mis en place dans un puits ; la conduite d~entrée raccordée à l~actionneur et s~étendant jusqu~à un site éloigné ; la conduite de sortie raccordée à l~actionneur et s~étendant jusqu~au site éloigné ; et un dispositif de mesure de volume de fluide raccordé à la conduite de sortie au niveau du site éloigné, le dispositif de mesure de volume de fluide servant à doser le volume de fluide provenant de la conduite de sortie.

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