Wellhead isolation tool

Details Wellhead isolation tool Wellhead isolation tool

1989-10-25

1991-02-19

Novosad, Stephen J.

Wells

With below and above ground modification

Above ground actuating means for below ground device

166 96, 166196, 166387, E21B 2306, E21B 3302

Patent

active

049934899

ABSTRACT:
A wellhead isolation tool is presented which includes an expanding nipple operable from outside the wellhead and casing, the nipple and its concentric mandrels being inserted into the wellhead and thus down through the wellhead array and into the casing or tubing by a single hydraulic cylinder and then the nipple expanded and sealed in the casing or tubing. The cylinder and its support rods may be removed when the nipple and mandrels are in place.

REFERENCES:
patent: 1811422 (1931-06-01), Brown
patent: 2010992 (1935-08-01), Howard
patent: 2721614 (1955-10-01), Simmons
patent: 4479537 (1984-10-01), Reed
patent: 4657075 (1987-04-01), McLeod
patent: 4691770 (1987-09-01), McLeod

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