Pressure equalizing safety valve for subterranean wells

Details Pressure equalizing safety valve for subterranean wells Pressure equalizing safety valve for subterranean wells

1998-06-03

2000-06-27

Schoeppel, Roger

Wells

Valves, closures or changeable restrictors

Fluid operated

166325, 1663327, 1663328, E21B 3412

Patent

active

060794976

ABSTRACT:
A subsurface safety valve having a valve member with a pressure equalizing mechanism is provided. The valve member includes a bore therethrough for receiving an equalizing plug. A beam is attached to the upper surface of the valve member for transferring downward motion of a flow tube to unseat the equalizing plug, and thereby establish fluid communication through the valve member prior to the opening of the valve member. A retention member is attached to the lower surface of the valve member to upwardly bias the equalizing plug within the plug bore of the valve member.

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Thomas G. Hill, Jr. and Rashmi Bhavsar "Development of a Self-Equalizing Surface Controlled Subsurface Safety Valve for Reliability and Design Simplification" Offshore Technology Conference paper No. 8199, Houston, May 1996.
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