Oligoglycerol fatty acid ester thickeners for oil-based drilling fluids
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United States of America Patent
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Apr 10, 2012
Grant Date -
Oct 7, 2010
app pub date -
Sep 12, 2008
filing date -
Sep 14, 2007
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Abstract
Oligoglycerol esters of fatty acids, preferably of unsaturated fatty acids, can be used as thickeners in oil-based drilling mud compositions. The oligoglycerides are preferably employed in invert drilling muds, the oily phase of which contains paraffins.
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