Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2006-10-24
2006-10-24
Tucker, Philip C. (Department: 1712)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S239000, C507S246000, C507S277000, C507S921000, C507S922000, C166S278000, C166S308400
Reexamination Certificate
active
07125826
ABSTRACT:
Methods of using invertible oil external-water internal emulsions in drilling, hydraulic fracturing, gravel packing and completion and then inverting the emulsion to a water external-oil internal emulsion are provided. The methods basically comprise the steps of contacting the oil external-water internal emulsion with an aqueous acid solution containing an anionic sulfonate surfactant for preventing aqueous acid solution-crude oil emulsions and crude oil sludging and a chemical for preventing the anionic sulfonate surfactant from reacting with the emulsifier in the oil external-water internal emulsion.
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Ritter David W.
Taylor Robert S.
Halliburton Energy Service,s Inc.
Kent Robert A.
McAfee & Taft
Tucker Philip C.
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