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A device for mutually independent control of regulating devices for controlling fluid flow between a hydrocarbon reservoir and a well includes a flow controller and a hydraulic actuator. The actuator is flow-relatedly arranged in series with at least two associated control valves in a path between t

A device for mutually independent control of regulating devices for controlling fluid flow between a hydrocarbon reservoir and a well includes a flow controller and a hydraulic actuator. The actuator is flow-relatedly arranged in series with at least two associated control valves in a path between two hydraulic pipes. The control valves are controlled to open for the flow of hydraulic liquid to the actuator by the pressure in the two hydraulic pipes, and the combination of two hydraulic pipes which are connected to an actuator is different for independently controllable regulating devices.

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A device for mutually independent control of regulating devices for controlling fluid flow between a hydrocarbon reservoir and a well includes a flow controller and a hydraulic actuator. The actuator is flow-relatedly arranged in series with at least two associated control valves in a path between t

A device for mutually independent control of regulating devices for controlling fluid flow between a hydrocarbon reservoir and a well includes a flow controller and a hydraulic actuator. The actuator is flow-relatedly arranged in series with at least two associated control valves in a path between two hydraulic pipes. The control valves are controlled to open for the flow of hydraulic liquid to the actuator by the pressure in the two hydraulic pipes, and the combination of two hydraulic pipes which are connected to an actuator is different for independently controllable regulating devices. 78600, 19920100, Austin, 433/073; US-5092346, 19920300, Hays, 128/861; US-5103838, 19920400, Yousif, 128/859; US-5117816, 19920600, Shapiro et al., 128/200.24; US-5154184, 19921000, Alvarez, 128/848; US-5154609, 19921000, George, 433/068; US-5183057, 19930200, Syrop et al., 128/845; US-5188529, 19930200, Luth, 433/068; US-5267862, 19931200, Parker, 433/215; US-5277202, 19940100, Hays, 128/848; US-5284161, 19940200, Karell, 128/848; US-5313960, 19940500, Tomasi, 128/848; US-5316020, 19940500, Truffer, 128/848; US-5365945, 19941100, Halstrom, 128/848; US-5373859, 19941200, Forney, 128/846; US-5409017, 19950400, Lowe, 128/848; US-5427117, 19950600, Thornton, 128/848; US-5537994, 19960700, Thornton, 128/204.18; US-5566683, 19961000, Thornton, 128/848