Filtration control additive for invert emulsion drilling fluids

Details Filtration control additive for invert emulsion drilling fluids Filtration control additive for invert emulsion drilling fluids

1985-11-18

1988-04-05

Guynn, Herbert B.

Compositions

Leather or fur treating

252 8515, 252 8551, 260404, C09K 706

Patent

active

047357320

ABSTRACT:
The present invention relates to a filtration control additive for use in invert emulsion drilling fluids; the method of preparing such additives; the invert emulsion drilling fluid produced therefrom; and a method of drilling, completing, and working over a subterranean well, utilizing such drilling fluid containing the filtration control additive which is utilized in a water-in-oil, emulsion-type subterranean drilling fluid. The additive comprises the pyrolyzed product obtained by intermixing and heating a finely divided humic acid-containing material and a primary amine having an alkyl radical of 10 to 20 carbon atoms or a primary amine having one alkyl-substituted phenyl radical, the alkyl radical having 10 to 20 carbon atoms. The amine may also be a secondary amine having at least one alkyl radical of 8 to 20 carbon atoms.

REFERENCES:
patent: 3168475 (1965-02-01), Jordan et al.
patent: 3671427 (1972-06-01), Andrews et al.
patent: 4421655 (1983-12-01), Cowan
patent: 4597878 (1986-07-01), House et al.

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