Patent ID: 9150777
Filing Date: 2015-10-06
Classification: C09K

Abstract:
1. An aqueous fluid comprising: water; at least one viscoelastic surfactant (VES) in an amount effective to increase the viscosity of the aqueous fluid; at least one internal breaker in an amount effective to reduce the viscosity of the gelled aqueous fluid, where the internal breaker is selected from the group consisting of mineral oils, hydrogenated polyalphaolefin oils, saturated fatty acids, and unsaturated fatty acids; and an oil-soluble surfactant breaker enhancer in an amount effective to accelerate reduction of viscosity of the gelled aqueous fluid, where the oil-soluble surfactant breaker enhancer is selected from the group consisting of sorbitan fatty acid esters, saponified hard oils, long chain alcohols, long chain fatty acid alcohols, long chain fatty amines, long chain sulfates, long chain sulfonates, phosopholipids, and lignins, where the aqueous fluid does not include any other viscosity reducing agent.