Metal seal for wellhead apparatus

Details Metal seal for wellhead apparatus Metal seal for wellhead apparatus

1984-08-14

1987-03-03

Novosad, Stephen J.

Wells

Processes

Placing or shifting well part

277 346, 166 88, E21B 3303

Patent

active

046468455

ABSTRACT:
Methods and apparatus for effecting a fluid-tight seal between a surface of an oil and/or gas well tubing or casing and a wellhead member are provided, wherein the surface has been unprepared to form the seal. The wellhead member is positioned circumferentially about a stub of the tubing or casing. A metal-to-metal fluid-tight sealing means of the wellhead member is positioned adjacent the unprepared surface of the tubing or casing. The sealing means has at least one metallic projection positioned to extend toward the unprepared surface of the tubing or casing. The metallic projection is forced into the unprepared surface of the tubing or casing thus to form a seal therebetween.

REFERENCES:
patent: 609752 (1898-08-01), Angell
patent: 1968297 (1934-07-01), Hild
patent: 2712455 (1955-07-01), Neilon
patent: 3438654 (1969-04-01), Jackson, Jr. et al.
patent: 4291889 (1981-09-01), Hardcastle
patent: 4306742 (1981-12-01), Hardcastle
patent: 4381114 (1983-04-01), Vanderford, Jr.
patent: 4381868 (1983-05-01), Croy et al.
patent: 4390186 (1983-06-01), McGee et al.

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