Wellhead equipment that use polymer sealing elements to seal off

Details Wellhead equipment that use polymer sealing elements to seal off Wellhead equipment that use polymer sealing elements to seal off

1998-01-23

1999-10-05

Tsay, Frank

Wells

Above ground apparatus

With seal for reciprocating member

166368, E21B 3304

Patent

active

059608765

ABSTRACT:
Wellhead equipment includes a body having a drilling conduit passage, whereby drilling conduit is passed through the body. Polymer sealing elements are disposed within the body and disposed in relation to the passage to seal off well pressure. A circulation passage extends through the body in the vicinity of the polymer sealing elements. The circulation passage has an inlet and an outlet whereby warm fluid is circulated through the circulation passage from the inlet to the outlet thereby raising the temperature of the polymer sealing elements to improve their cold weather performance.

REFERENCES:
patent: 2674474 (1954-04-01), Lister
patent: 4480843 (1984-11-01), Springer
patent: 4697639 (1987-10-01), Caraway et al.
patent: 5163514 (1992-11-01), Jennings
patent: 5255743 (1993-10-01), Adam et al.
patent: 5549156 (1996-08-01), D'Alfonoso et al.
patent: 5865245 (1999-02-01), Trout et al.

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