Invert emulsion fluids suitable for drilling
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United States of America Patent
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Nov 16, 1999
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Mar 20, 1998
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Aug 2, 1996
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Abstract
New drilling fluids have been invented which are invert emulsion fluids comprising an oleaginous liquid, a non-oleaginous liquid, and a protonated amine. Such fluids are acidic and thus useful in drilling wells in which acidic gases such as CO.sub.2 or H.sub.2 S are likely to be encountered and break, i.e. de-emulsify, the drilling fluid.
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