Pressure regulating and relief valve assembly

Details Pressure regulating and relief valve assembly Pressure regulating and relief valve assembly

1982-08-02

1984-09-25

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166302, 166 59, 137115, E21B 4312, E21B 4324

Patent

active

044731213

ABSTRACT:
A pressure regulating and relief valve assembly, such as an assembly positionable in a lower portion of a well casing. The valve assembly has a main relief valve assembly or back pressure regulator that is designed to open when the steam pressure exceeds a first predetermined value. A secondary relief valve assembly is provided to vent excess pressure to a space exterior of the valve assembly when the pressure exceeds a second predetermined value, the second value being higher than the first value. The valve assembly is positionable within a well casing at the bottom of a bore hole between a steam generator and a probe utilizing the steam generator. When the assembly is so positioned, excess pressure is vented to a space between the valve assembly and the inner surface of the encompassing well casing.

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