Title: Fluids containing viscoelastic surfactant and methods for using the same
Application Number: 98807105 Application Date: 1998.06.09
Publication Number: 1263481 Publication Date: 2000.08.16
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: A61K7/50;B01F17/00;C10C3/00;E21B43/26
Applicant(s) Name: Rhodia Inc. Address:
Inventor(s) Name: M. S. Dahanayake;Yang Jiang;J. H. Y. Niu
Attorney & Agent: sun ai
Abstract:
    Viscoelastic surfactant based aqueous fluid systems useful as thickening agents in various applications, e.g. to suspend particles produced during the excavation of geologic formations. The surfactants are zwitterionic/amphoteric surfactants such as dihydroxyl alkyl glycinate, alkyl ampho acetate or propionate, alkyl betaine, alkyl amidopropyl betaine and alkylamino mono- or di-propionates derived from certain waxes, fats and oils. The thickening agent is used in conjunction with an inorganic water-soluble salt or organic additive such as phthalic acid, salicylic acid or their salts.
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