Method for correcting lost circulation

Details Method for correcting lost circulation Method for correcting lost circulation

1978-06-26

1979-05-22

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring with specific fluid

175 69, 175 72, E21B 2100

Patent

active

041554108

ABSTRACT:
Lost circulation in a well occurring during drilling is reduced by aeration of clay-free, non-thixotropic, brine wellbore fluids comprising hydroxyalkyl cellulose and preferably magnesia as a stabilizer. The gas is easily and completely removed from the foam returned to surface with only a conventional degassing and gas busting equipment normally found in a solids removal system. The advantages of the clay-free, non-thixotropic, drilling fluids as known are preserved and the system allows rapid change from aerated to non-aerated fluid as required.

REFERENCES:
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patent: 2818230 (1957-12-01), Davis
patent: 3040820 (1962-06-01), Gallus
patent: 3297098 (1967-01-01), Elman et al.
patent: 3303895 (1967-02-01), Fontenot
patent: 3313362 (1967-04-01), Schneider
patent: 3387672 (1968-06-01), Cook
patent: 3493059 (1970-02-01), Cox
patent: 3844361 (1974-10-01), Jackson
patent: 3852201 (1974-12-01), Jackson
patent: 4013568 (1977-03-01), Fischer et al.

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