Drilling fluids and muds containing selected ester oils

C - Chemistry – Metallurgy – 09 – K

Patent

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31/32, 166/32

C09K 8/34 (2006.01) C01G 9/02 (2006.01) C07C 69/025 (2006.01)

Patent

CA 2006009

Invert emulsion muds for drilling of gas and oil, which are environmentally safe, and which contain: A. a continuous oil phase composed predominantly of at least one monocarboxylic acid ester of a C2C12 monofunctional alkanol wherein the monocarboxylic acid contains from 12 to 16 carbon atoms and is aliphatically saturated, B. a disperse aqueous phase, C. at least one emulsifier, D, at least one weighting agent, E, at least one fluid loss additive, and F. a mild alkaline reserve.

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