Oligoglycerol fatty acid ester lubricant additives for drilling fluids
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United States of America Patent
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Aug 7, 2012
Grant Date -
Nov 25, 2010
app pub date -
Sep 12, 2008
filing date -
Sep 14, 2007
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Abstract
The use is described of oligoglycerol fatty acid esters, produced from
- (a) an acid component, selected from (a1) fatty acids of the general formula (I)R—COOH (I)in which R stands for a saturated or unsaturated, branched or linear alkyl- or alkenyl radical with 7 to 21C atoms, and/or(a2) dicarboxylic acids and/or(a3) dimer fatty acids and/or(a4) oligomer fatty acids and/or(a5) hydroxy fatty acids with (b) a polyol component, which is selected from oligoglycerols or alkoxylates of oligoglycerols, as additive to oil-based drilling mud compositions to improve the lubricating effect of these mud systems.
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