Oleophilic alcohols as a constituent of invert drilling fluids
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United States of America Patent
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Sep 20, 1994
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N/A
app pub date -
Apr 28, 1993
filing date -
Apr 7, 1989
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Abstract
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.
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