NON-AQUEOUS DRILLING ADDITIVE USEFUL TO IMPROVE LOW SHEAR RATE VISCOSITY
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United States of America Patent
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Issued Date -
Mar 6, 2014
app pub date -
Sep 5, 2012
filing date -
Sep 5, 2012
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Abandoned
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Abstract
A method to control viscosity with respect to shear rate for an oil based drilling fluid by adding a polyamide drilling fluid additive to the oil based drilling fluid. In some embodiments, a polyamide drilling fluid additive includes a reaction product of (i) a carboxylic acid with a single carboxylic moiety or two carboxylic moieties, and (ii) a polyamine having an amine functionality of two or more; and placing the placing the oil based drilling fluid into the subterranean formation.
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