Well head isolation tool

Details Well head isolation tool Well head isolation tool

1985-12-27

1987-04-14

Novosad, Stephen J.

Wells

With below and above ground modification

Above ground actuating means for below ground device

166 82, 166196, E21B 3302, E21B 2306

Patent

active

046570756

ABSTRACT:
A concentric mandrel assembly for use in a wellhead isolation tool is operable from outside the wellhead and casing. An outer mandrel of the assembly carries a packoff nipple, including a resilient seal member, on its lower end and the inner mandrel of the assembly carrier carries an expander on its lower end. Means are provided for axially moving the mandrels relative to one another so that the expander can apply outward force on the resilient seal against the wall of a well casing.

REFERENCES:
patent: 1997431 (1935-04-01), Penick et al.
patent: 2449642 (1948-09-01), Coons
patent: 2555145 (1951-05-01), McKinney
patent: 2813589 (1957-11-01), Woodruff
patent: 2935133 (1960-05-01), Eckel et al.
patent: 2954742 (1960-10-01), Williams
patent: 3100536 (1963-08-01), Tamplen
patent: 3392785 (1968-07-01), King
patent: 4241786 (1980-12-01), Bullen

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