Invertible well bore servicing fluid
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United States of America Patent
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Jul 3, 2007
Grant Date -
Apr 13, 2006
app pub date -
Nov 18, 2005
filing date -
Jan 24, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A method for using an invert emulsion fluid in a well bore, comprising placing an invert emulsion fluid in a well bore, wherein the invert emulsion fluid comprises an oleaginous fluid, a non-oleaginous fluid and an emulsifier comprising one or more amines generally represented by the formula: ##STR00001## wherein R is a radical selected from the group consisting of abietyl, hydroabietyl, dihydroabietyl, tetrahydroabietyl, and dehydroabietyl, each R' may be the same or different and is an alkyl having from about 1 to about 3 carbons, each A may be the same or different and is NH or O, and the sum of x and y ranges from about 1 to about 20, and contacting the invert emulsion fluid with an acid solution to reversibly convert the invert emulsion to an oil-in-water emulsion.
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