Self-removing choke insert system

Details Self-removing choke insert system Self-removing choke insert system

1995-11-24

1997-09-16

Tsay, Frank

Wells

Processes

Assembling well part

166348, 166382, E21B 43013

Patent

active

056670141

ABSTRACT:
A subsea choke assembly for a well has a resilient closure seal within it which is used for retrieval purposes as well. The closure member is a metal resilient ring having tapered seal surfaces. The tapered seal surfaces locate between the choke body housing and the choke body bonnet. When securing the bonnet to the housing, the resiliency of the closure seal must be overcome, as well as the force required to insert an inner seal into its sealing surface within the bore. When the bonnet is released, the closure seal has sufficient spring force to push itself upward from the housing. In addition, it pushes the bonnet upward from closure seal. The choke body moves upward in unison with the bonnet, freeing the inner seal from its sealing surface.

REFERENCES:
patent: 3589667 (1971-06-01), Lewis
patent: 4083409 (1978-04-01), Barrington
patent: 4446922 (1984-05-01), Bowyer et al.
patent: 4540053 (1985-09-01), Baugh et al.
patent: 4615544 (1986-10-01), Baugh
patent: 4749046 (1988-06-01), Gano
patent: 4796698 (1989-01-01), Gano
patent: 4919459 (1990-04-01), Miller
patent: 4926898 (1990-05-01), Sampey
patent: 5044432 (1991-09-01), Cunningham et al.

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