Hydraulic system for electronically controlled downhole...

Details Hydraulic system for electronically controlled downhole... Hydraulic system for electronically controlled downhole...

E - Fixed Constructions

21

B

E21B 34/10 (2006.01) E21B 23/04 (2006.01) E21B 23/08 (2006.01) E21B 34/16 (2006.01)

Patent

CA 2061571

A hydraulic system is provided for an electronically controlled downhole testing tool. The tool operates on a pressure differential between the well annulus and a sub- stantially atmospheric pressure dump chamber defined in the tool. Power passages communicate a power piston with the well annulus and the dump chamber. Normally closed electric solenoid control valves are disposed directly in the power passages to control fluid flow therethrough. A pressure regulator regulates the pressure differential across the electric solenoid control valves.

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