Liner connection
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United States of America Patent
Stats
-
Nov 17, 1987
Grant Date -
N/A
app pub date -
Jun 20, 1986
filing date -
Jun 20, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A connection for plain end well liner pipe and the like uses a threaded pin and box having a locking reverse angle thread profile to prevent radial separation of the pin and box due to deep well pressure and make-up pressures. The connection includes a primary internal seal structure wherein a metal-to-metal interference seal is located adjacent a thermoplastic ring seal. Separation of the interference seal due to the proximity of the thermoplastic seal is prevented by the locking thread profile. An external seal uses a metal-to-metal interference seal enhanced by a locking torque shoulder seal which acts with the thread profile to prevent radial separation of the interference seal.
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