Surface controlled subsurface safety valve downstop seal

Details Surface controlled subsurface safety valve downstop seal Surface controlled subsurface safety valve downstop seal

1999-04-16

1999-11-02

Neuder, William

Wells

Processes

Placing or shifting well part

1663328, 137629, E21B 3410

Patent

active

059752122

ABSTRACT:
In a broad aspect, the invention relates to an improved downstop seal for use with a rod-piston actuator of a surface controlled subsurface safety valve, wherein the rod-piston actuator has a beveled shoulder formed thereon. The improved downstop seal has a resilient, primary, sealing member having a beveled sealing surface to matingly engage with a portion of the beveled shoulder of the rod-piston actuator; and further has a non-resilient, secondary, sealing member having a beveled sealing surface to matingly engage with a portion of the beveled shoulder of the rod-piston actuator.

REFERENCES:
patent: 4293038 (1981-10-01), Evans
patent: 4527630 (1985-07-01), Pringle
patent: 4716969 (1988-01-01), Pringle
patent: 5125457 (1992-06-01), Meaders
patent: 5503229 (1996-04-01), Hill, Jr. et al.
patent: 5598864 (1997-02-01), Johnston et al.

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