High temperature stable drilling fluids containing non-aqueous s

Details High temperature stable drilling fluids containing non-aqueous s High temperature stable drilling fluids containing non-aqueous s

1982-08-31

1985-02-12

Guynn, Herbert B.

Compositions

Leather or fur treating

252 855R, C09K 706, E21B 4300

Patent

active

044989946

ABSTRACT:
There are provided drilling fluids containing densifying salt dissolved in a solvent for this salt. This solvent contains at least about 50 percent by weight of a liquid non-aqueous solvent such as, e.g., N-methyl-2-pyrrolidone, such that the overall solvent has desirable properties with respect to the ability to dissolve salt, miscibility with water, melting point, boiling point, flash point and viscosity.

REFERENCES:
patent: 2297660 (1942-09-01), Mazee
patent: 3025234 (1962-03-01), Canterino
patent: 4046197 (1977-09-01), Gruesbeck et al.
patent: 4304677 (1981-12-01), Stauffer et al.
patent: 4308374 (1981-12-01), Vollbracht et al.
patent: 4330414 (1982-05-01), Hoover
patent: 4392964 (1983-07-01), House et al.

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