Low pressure responsive downhold tool with hydraulic lockout

Details Low pressure responsive downhold tool with hydraulic lockout Low pressure responsive downhold tool with hydraulic lockout

1991-10-21

1993-01-19

Britts, Ramon S.

Wells

Valves, closures or changeable restrictors

Fluid operated

166240, 166324, E21B 3400

Patent

active

051800071

ABSTRACT:
An annulus pressure responsive well tool includes a selectively actuatable hydraulic bypass for bypassing a pressure differential across a power piston of the tool so that an operating element associated with the power piston will remain in a chosen position during a subsequent change in well annulus pressure.

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