REAGENT IMPROVING FLUIDITY OF INVERTED DRILLING MUDS Russian patent published in 1994 - IPC

FIELD: petroleum-extracting industry. SUBSTANCE: the ester-based reagent comprises a methyl ester of a mixture of saturated C₈-C₁₆ monocarboxylic acids or a methyl ester of a mixture of saturated C₁₀-C₂₂ monocarboxylic acids and single and/or multiolefinic unsaturated C₁₂-C₂₂ monocarboxylic acids and single and/or multiolefinic unsaturated C₁₈-C₂₀ monocarboxylic acids, or a methyl ester of a mixture of saturated C₁₄-C₂₂ monocarboxylic acids and single and/or multiolefinic unsaturated C₁₆-C₁₈ monocarboxylic acids or a methyl ester of a mixture of single and/or multiolefinic unsaturated C₁₆-C₂₂ monocarboxylic acids or a methyl ester of a mixture of single and/or multiolefinic unsaturated C₁₆-C₂₄ monocarboxylic acids. EFFECT: improved properties of the reagent. 5 tbl