DRILLING FLUID USING SURFACTANT PACKAGE
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United States of America Patent
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Issued Date -
Jan 23, 2014
app pub date -
Jul 19, 2012
filing date -
Jul 19, 2012
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Abstract
A drilling fluid, comprising an aqueous continuous phase, and a surfactant system comprising a mixture of an ester phosphate and a non-ionic ethoxylated alcohol. The drilling fluid may also contain one or more of at least one salt, an alkaline material, a viscosifying agent, a starch or starch derivative, a bridging agent, a weighting material, and a diesel oil or non-aromatic oil.
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