Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 4, 2007
Patent Application Number
10738366
Date Filed
December 17, 2003
Patent Citations Received
Patent Primary Examiner
Patent abstract
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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