Method for stressing thermal well casings

Details Method for stressing thermal well casings Method for stressing thermal well casings

1980-07-03

1982-04-27

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

166291, 405154, E21B 3314, E21B 3316

Patent

active

043265863

ABSTRACT:
This invention relates to an improved method of cementing a casing string in a wellbore where the casing string will subsequently be heated by the injection of steam or by flowing of other hot fluids through the casing. The annulus between the wellbore and casing is at least partially filled with cement. A J-slot is positioned on the lower portion of the casing string. The lower end of a tubing string is provided with a stressing tool and lug, the lug being engageable with the J-slot and the tubing string is lowered into the casing and the lug is engaged with the J-slot. The tubing string is stressed until the cement in the annulus sets, thereby allowing the casing to be set under stress.

REFERENCES:
patent: 2738011 (1956-03-01), Mabry
patent: 2876844 (1959-03-01), Warner
patent: 3055424 (1962-09-01), Allen
patent: 3557875 (1971-01-01), Solum et al.
patent: 3667547 (1972-06-01), Ahlstone
patent: 3976139 (1976-08-01), Wilder
patent: 4155404 (1979-05-01), Hollingsworth

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