Well completion in permafrost

Details Well completion in permafrost Well completion in permafrost

1975-09-24

1976-08-10

Purser, Ernest R.

Wells

Processes

With indicating, testing, measuring or locating

166302, 166DIG1, E21B 2100, E21B 4300, E21B 4700

Patent

active

039736261

ABSTRACT:
A method for displacing a freezable liquid from a permafrost zone in a wellbore and replacing the displaced freezable liquid with an essentially nonfreezable liquid, wherein the nonfreezable liquid is introduced into the wellbore and displaced freezable liquid returns are recovered at the earth's surface, the nonfreezable liquid being of known water and solids content. The liquid returns are monitored for changes in water and solids content until a cumulative volume of freezable liquid has been recovered at the earth's surface which indicates displacement of the freezable liquid originally in the permafrost zone of the wellbbore to the desired extent.

REFERENCES:
patent: 3020952 (1962-02-01), Sullivan
patent: 3371527 (1968-03-01), Moulin
patent: 3729986 (1973-05-01), Leonard
patent: 3791448 (1974-02-01), Schuh
patent: 3876004 (1975-04-01), Bell et al.

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