Electro hydraulic downhole control device

Details Electro hydraulic downhole control device Electro hydraulic downhole control device

1997-02-14

1998-11-10

Suchfield, George

Wells

Automatic

13762548, 13762568, 166 666, 166 667, E21B 4312, E21B 4700

Patent

active

058329960

ABSTRACT:
A downhole controller for a flow control device. The controller is responsive to commands from the surface or from downhole and controls the flow device using a four way solenoid actuated spool valve and a hydraulically actuated piston system connected to the flow control device.

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patent: 5127477 (1992-07-01), Schultz
patent: 5355960 (1994-10-01), Schultz et al.

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