Reversible emulsions stabilized by amphiphilic polymers

Details Reversible emulsions stabilized by amphiphilic polymers Reversible emulsions stabilized by amphiphilic polymers

2011-04-19

2011-04-19

Kugel, Timothy J. (Department: 1761)

Earth boring, well treating, and oil field chemistry

Earth boring

Contains organic component

C507S119000, C507S129000, C507S136000, C166S305100, C524S555000

Reexamination Certificate

active

07928039

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: 4524175 (1985-06-01), Stanley, Jr.
patent: 6822039 (2004-11-01), Monfreux-Gaillard et al.
patent: WO00/31154 (2000-06-01), None

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