Reversible emulsions stabilized by amphiphilic polymers and...

Details Reversible emulsions stabilized by amphiphilic polymers and... Reversible emulsions stabilized by amphiphilic polymers and...

2007-08-28

2007-08-28

Tucker, Philip C. (Department: 1712)

Earth boring, well treating, and oil field chemistry

Earth boring

Contains organic component

C507S121000, C516S026000, C516S027000

Reexamination Certificate

active

10892575

ABSTRACT:
The invention concerns modified hydrophobic polyelectrolytes by amide formation of a hydrophilic skeleton by n-alkylamines whereof the alkyl chain comprises 6 to 22 carbon atoms. Preferably, the amide formation is obtained by di-n-dodecylamine. The hydrophilic skeleton is preferably a sodium polyacrylate or polyacrylic acid corresponding to a statistical acrylate-AMPS copolymer. Said polymers can be used for stabilizing direct or invert emulsions likely to be destabilized or inverted by a modification in the degree of salinity of the aqueous phase or a pH modification. The invention is particularly useful for stabilizing oil drilling fluids or the like in particular drilling, fracturation, acidification or completion fluids.

REFERENCES:
patent: 4921903 (1990-05-01), Fong
patent: 5208216 (1993-05-01), Williamson et al.
patent: 6822039 (2004-11-01), Monfreux-Gaillard et al.

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