Hydraulic system for electronically controlled pressure activate

Details Hydraulic system for electronically controlled pressure activate Hydraulic system for electronically controlled pressure activate

1990-07-10

1991-09-24

Kisliuk, Bruce M.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166 651, 166 664, 166242, 166319, 166323, E21B 3410

Patent

active

050506811

ABSTRACT:
An annulus pressure responsive tool is temporarily deactivated so as to no longer be responsive to changes in well annulus pressure. The tool includes a tool housing with a power piston slidably disposed in the housing. A first pressure conducting passage in the housing communicates the well annulus to one side of the power piston. A reference pressure means is disposed in the housing for providing pressure to the second side of the power piston. Thus, a pressure differential is created across the power piston. Also, a selectively operable temporary deactivating means is provided so that the power piston is no longer responsive to changes in the well annulus pressure.

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