Water-in-oil microemulsion drilling fluids

Details Water-in-oil microemulsion drilling fluids Water-in-oil microemulsion drilling fluids

1975-09-22

1977-03-15

Guynn, Herbert B.

Compositions

Leather or fur treating

175 65, 252308, 252309, C09K 702, C09K 706

Patent

active

040123294

ABSTRACT:
An oil-external microemulsion drilling fluid having a wide range of tolerance for salinity, having good gel strength and low fluid loss characteristics, and also obtained by mixing about 1% to about 30% of a sodium petroleum sulfonate having an average equivalent weight within the range of about 350 to about 525, about 5% to about 84% of a hydrocarbon (e.g. diesel fuel), about 15% to about 90% of an aqueous medium (can contain water soluble salts), about 0.01 to about 20% of a cosurfactant (e.g. alcohols such as primary amyl alcohol) and about 0.1 to about 15% of bentonite clay. Weighting agents, e.g. barite, and other desired additives can be added to the microemulsion.

REFERENCES:
patent: 2696468 (1954-12-01), Fischer
patent: 2739120 (1956-03-01), Fischer
patent: 3002923 (1961-10-01), Barker et al.
patent: 3111491 (1963-11-01), Atkins
patent: 3252903 (1966-05-01), Crittendon
patent: 3254714 (1966-06-01), Gogarty et al.
patent: 3330343 (1967-07-01), Tosch et al.
patent: 3734856 (1973-05-01), Son

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