Pressure relief actuated valves

Details Pressure relief actuated valves Pressure relief actuated valves

2008-07-09

2010-06-22

Wright, Giovanna C (Department: 3672)

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

C166S072000, C166S073000, C166S321000, C166S334100

Reexamination Certificate

active

07740075

ABSTRACT:
An embodiment of a valve that is operable from one position to another position upon relief of an applied pressure includes a housing having a bore; a valve member disposed with the housing, wherein the valve member is actuated to one position in response to a certain applied pressure and actuates toward another position upon relief of the certain applied pressure; and a relief system relieving the pressure applied to the valve member when the applied pressure falls below a selected pressure level.

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