Method and device for pressure controlled sequential operation

Details Method and device for pressure controlled sequential operation Method and device for pressure controlled sequential operation

E - Fixed Constructions

21

B

E21B 34/10 (2006.01) E21B 23/04 (2006.01)

Patent

CA 2453904

A method and a device for controlling a downhole hydraulic sequential control system (1) in which a number of pressure relief valves (20, 22) are arranged to open sequentially directly or indirectly for corresponding actuators (26, 34) through introduction of a hydraulic fluid, wherein the pressure of working fluid supplied to the control system is transmitted to hydraulic fluid in the control system (1). The pressure transfer may be effected by means of a dividing piston (6).

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