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AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsHeinz Mueller, Claus-Peter Herold, Stephan von Tapavicza
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The use is described of a) mono- and/or polyfunctional alcohols of natural and/or synthetic origin which are at least largely water-insoluble and are fluid and pumpable in the temperature range of 0.degree. to 5.degree. C., or of b) solutions, fluid and pumpable in the given temperature range, in ecologically-acceptable water-insoluble oils, of at least largely water-insoluble mono- and/or polyfunctional alcohols of natural and/or synthetic origin, as the continuous oil phase of drilling fluids, which exist as W/O-emulsions, have a dispersed aqueous phase and preferably have further usual additives in the alcohol-containing oil phase, and which are suitable for the environment-friendly development of, e.g., petroleum and natural gas deposits. Drilling fluids of the above type are also described, which are characterized in that they contain as the continuous oil phase, or dissolved in ecologically-acceptable water-insoluble oils, an additive of at least largely water-insoluble mono- and/or polyfunctional alcohols, the oil phase in each case being fluid and pumpable in the temperature range of 0.degree. to 5.degree. C. and having flash points above 80.degree. C.
An invert emulsion drilling mud composition suitable for environmentally-compatible development of petroleum and natural gas deposits, consisting essentially of
The process of improving the rheology, emulsification, lubrication and fluid-loss properties of an invert emulsion drilling mud composition comprising a continuous oil phase containing a water-insoluble oil which is fluid and pumpable at a temperature of about 0.degree. to about 5.degree. C. and is selected from (a) an ester of a C.sub.1 -C.sub.5 monocarboxylic acid and a mono-or polyfunctional alcohol, (b) an ester of a C.sub.6 -C.sub.11 monocarboxylic acid and a mono- or polyfunctional alcohol, (c) a monocarboxylic acid ester of a C.sub.6 -C.sub.12 monofunctional alkanol wherein the monocarboxylic acid contains from 12 to 16 carbon atoms and is aliphatically saturated, and (d) a monocarboxylic acid ester of a C.sub.6 -C.sub.12 monofunctional alcohol wherein the monocarboxylic acid contains from 16 to 24 carbon atoms and is olefinically mono- or poly-unsaturated, comprising adding to said drilling mud composition from about 0.1 to about 10% by weight of a substantially-water insoluble mono- or polyfunctional alcohol having at least 6 carbon atoms, said alcohol being fluid and pumpable at a temperature of about 0.degree. to about 5.degree. C. and having a flash point above 80.degree. C., said oil phase being free of aromatic molecular constituents, basic amino and carboxyl groups.
Dependencies are inferred from the claim text.