Fluid loss control additives for oil-based well-working fluids

Details Fluid loss control additives for oil-based well-working fluids Fluid loss control additives for oil-based well-working fluids

1985-07-12

1987-06-09

Wax, Robert A.

Compositions

Leather or fur treating

166282, 166283, 175 65, 175 72, 252 8551, 523130, 526312, C09K 706

Patent

active

046718834

ABSTRACT:
Fluid loss control additives for oil-based well-working fluids comprise a solubilized lignite derivative and an oil-swellable or oil-soluble polymer. The solubilized lignite derivative may be oil-solubilized (e.g. a lignite/amine complex) or water-solubilized (e.g. causticized lignite) and may be incorporated in a polymer matrix or added to a dispersion of a polymer in an aqueous medium.

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Kurochkin et al., "Prevention of Drilling Mud Loss in Stratal Waters," Neft. Khoz., 1981, (6), 16-19, (CA 95:153237).

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