Use of low M.S. hydroxyethyl cellulose for fluid loss control in

Details Use of low M.S. hydroxyethyl cellulose for fluid loss control in Use of low M.S. hydroxyethyl cellulose for fluid loss control in

1985-08-19

1986-12-16

Guynn, Herbert B.

Compositions

Leather or fur treating

252 85A, C09K 702

Patent

active

046295739

ABSTRACT:
Improved drilling operations for recovery of gas and/or oil from a porous subterranean formation are achieved using a drilling fluid, circulated in a well penetrating the subterranean formation, which minimizes loss of said drilling fluid into the surrounding porous formation. The improvement comprises employing a drilling fluid comprising water and an effective amount of hydroxyethyl cellulose having a molar substitution value of from about 1.1 to about 1.6, and an apparent viscosity in water of at least about 15 cps.

REFERENCES:
patent: 2570947 (1951-10-01), Himel et al.
patent: 3284353 (1966-11-01), Batdorf et al.
patent: 3753903 (1973-08-01), Fischer et al.
patent: 3785438 (1974-12-01), Jackson et al.
patent: 3878141 (1975-04-01), Jackson et al.
patent: 3953335 (1976-04-01), Jackson
patent: 3989632 (1976-11-01), Fischer et al.

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