METAL TO METAL SEAL FOR DOWNHOLE TOOLS
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United States of America Patent
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-
N/A
Issued Date -
Jul 17, 2008
app pub date -
Jan 7, 2008
filing date -
Jan 17, 2007
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A metal to metal seal for downhole tools. A sealing device includes a metal seal. A nonmetal seal may be used to bias the metal seal in a radial direction in response to a pressure differential applied to the sealing device. A well tool includes a housing assembly, a closure member and the sealing device. Both of the metal and nonmetal seals contact a selected one of the housing assembly and closure member when the closure member blocks flow through the housing assembly. A method of sealing between the housing assembly and closure member includes the step of displacing the closure member to relieve the pressure differential, the metal seal continuing to seal against the pressure differential until the nonmetal seal no longer seals between the housing assembly and the closure member.
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