Rheology modifier for drilling and well treatment fluids
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United States of America Patent
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Apr 4, 2017
Grant Date -
Jun 4, 2015
app pub date -
Jun 20, 2013
filing date -
Jun 25, 2012
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Abstract
Water in oil emulsion drilling and well treatment fluids comprising an ester of trimer fatty acids and polyoxyethyiene glycol, the polyoxyethyiene glycol having average molecular weight from about (150) to about (600) and the trimer acids having at least about 20% of carboxyl acid groups esterified, as rheology modifier.
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