Invertible well bore servicing fluid

Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component

Reexamination Certificate

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Details

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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