VISCOELASTIC SURFACTANT FLUIDS AND RELATED METHODS OF USE

摘要

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 ALKYLIMINO MONO- OR DI-PROPIONATES DERIVED FROM CERTAIN WAXES, FATS AND OILS. THE THICKENING AGENT IS USED IN CONJUCTION WITH AN INORGANIC WATER-SOLUBE SALT OR ORGANIC ADDITIVE SUAH AS PHTHALIC ACID, SALICYLIC ACID OR THEIR SALTS.