Wellhead apparatus

Details Wellhead apparatus Wellhead apparatus

1993-03-04

1994-02-22

Bui, Thuy M.

Wells

Expansible anchor or casing

Liner hanger

E21B 2300

Patent

active

052879259

ABSTRACT:
There is disclosed wellhead apparatus in which a pipe string is suspended within the bore of a housing and the annular space between the bore and the outer wall of the pipe string or a mandrel-type hanger from which the pipe string is suspended is closed by a seal assembly. The seal assembly is lowered into the annular space on a tool so as to close the same as seal rings carried about the outer and inner sides of the body are energized into sealing engagement with the bore of the housing and the outer wall.

REFERENCES:
patent: 4757860 (1988-07-01), Reimert
patent: 5074362 (1991-12-01), Allwin
patent: 5086845 (1992-02-01), Baugh
patent: 5092401 (1992-03-01), Heynen

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