Wells – Expansible anchor or casing – Liner hanger
Patent
1991-08-06
1993-03-16
Melius, Terry Lee
Wells
Expansible anchor or casing
Liner hanger
166382, 277236, E21B 3304
Patent
active
051936160
ABSTRACT:
A tubing hanger assembly having a metal-to-metal seal assembly for sealing the annulus between the tubing hanger assembly and an outer casing hanger assembly. The metal-to-metal seal assembly includes a static metal-to-metal seal for sealing with the tubing hanger assembly and a dynamic metal-to-metal seal for sealing with the casing hanger assembly. The static metal-to-metal seal sealingly engages the body of the tubing hanger assembly as a part of the factory assembly procedure. Thus, the static metal-to-metal seal may be tested at the factory and replaced if leakage is detected. The dynamic metal-to-metal seal has a non-sealing position when run into the well and a sealing position upon actuation downhole. The metal-to-metal seal assembly includes actuation means engageable with the outer casing assembly that actuates the dynamic metal-to-metal seal from the non-sealing position to the sealing position.
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Cooper Industries Inc.
Melius Terry Lee
Rose David A.
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