Suspension characteristics in invert emulsions
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United States of America Patent
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Apr 8, 2014
Grant Date -
Mar 3, 2011
app pub date -
Sep 1, 2009
filing date -
Sep 1, 2009
priority date (Note) -
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Abstract
Among the methods provided is a method of drilling a subterranean well with an invert emulsion fluid comprising: providing an invert emulsion fluid formed by combining components that comprise: an oil-based continuous phase; an aqueous discontinuous phase; and a polar hydrophobic additive that comprises a polar hydrophobe, wherein the polar hydrophobic additive may substantially increases the yield point, the low-shear yield point, or both of the invert emulsion fluid relative to a fluid without a polar hydrophobic additive while limiting the change in the plastic viscosity to no more than about 35% of the change in the property with the largest increase; and placing the invert emulsion fluid in a subterranean formation.
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