Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2007-07-03
2007-07-03
Tucker, Philip C. (Department: 1712)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S129000, C507S128000, C507S133000, C507S237000, C507S238000, C507S244000, C507S246000, C516S027000
Reexamination Certificate
active
11283009
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: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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Foster Ryan M.
Taylor Robert S.
Thaemlitz Carl J.
Halliburton Energy Service,s Inc.
Roddy Craig W.
Rose Conley
Tucker Philip C.
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