Wellhead isolation tool, wellhead assembly incorporating the...

Wells – Above ground apparatus – Well caps or casing heads

Reexamination Certificate

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Details

C166S075140, C166S096100, C285S123100

Reexamination Certificate

active

07416020

ABSTRACT:
A wellhead assembly is provided including a casing and a tubular member mounted over the casing. A flange extends from the tubular member. A generally elongated annular member is provided in the tubular member. The generally elongated annular member has a first end portion above the tubular member and second end portion below the first end portion. A hanger may be suspended within the tubular member. In such case, a seal may be formed between the elongate annular member and the hanger.

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Cooper Oil Tool, W-K-M Wellhead Equipment Catalog 86, article entitled “W-K-M Metal-to-Metal Sealing Tubing Hangers”, © 1994 Cooper Industries, Houston, Texas.
Guardian, Casing & Tree Savers, 2000, 3 pages.

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