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

2007-09-04

2007-09-04

Mai, Lanna (Department: 3637)

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

C166S319000, C166S381000, C166S320000, C166S386000, C091S029000

Reexamination Certificate

active

10738366

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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U.K. Search Report, Application No. GB 0328589.7, dated Apr. 20, 2004.

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