Use of selected oleophilic ethers in water-based drilling fluids of the O/W emulsion type and corresponding drilling fluids with improved ecological acceptability
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United States of America Patent
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Jul 22, 2003
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N/A
app pub date -
Mar 3, 1993
filing date -
May 20, 1989
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Expired
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Abstract
The use is disclosed of at least substantially water-insoluble ethers which are fluid and/or at least plastically deformable at working temperature and have flash points of at least 80.degree. C., of mono- and/or polyfunctional alcohols of natural and/or synthetic origin or corresponding solutions of such ethers in ecologically acceptable water-insoluble oils as the dispersed oil phase of water-based O/W-emulsion drilling fluids which are suitable for the environmentally acceptable development of geological formations and which contain, if desired, insoluble, finely particulate weighting agents for the formation of water-based O/W-emulsion drilling muds and/or further additives, such as emulsifiers, fluid-loss additives, wetting agents, alkali reserves and/or auxiliary substances for the inhibition of drilled rock of high water-sensitivity.
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