Saponified fatty acids as viscosity modifiers for...

Details Saponified fatty acids as viscosity modifiers for... Saponified fatty acids as viscosity modifiers for...

2007-10-31

2011-10-25

Metzmaier, Daniel S (Department: 1762)

Colloid systems and wetting agents; subcombinations thereof; pro

Compositions containing an agent for breaking ; processes of...

C516S099000, C516S900000, C507S132000, C507S138000, C507S265000, C507S240000, C507S245000, C510S221000, C510S280000, C510S336000, C510S370000, C510S383000, C510S396000, C510S403000, C510S438000, C510S503000

Reexamination Certificate

active

08044106

ABSTRACT:
Fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities affected (increased or reduced) by the indirect or direct action of a composition that contains at least one fatty acid that has been affected, modified or reacted with an alkali metal halide salt, an alkaline earth metal halide salt, and/or an ammonium salt and a water soluble base. The composition containing the resulting saponification product is believed to either act as a co-surfactant with the VES itself to increase viscosity and/or possibly by disaggregating or otherwise affecting the micellar structure of the VES-gelled fluid. In a non-limiting instance, a brine fluid gelled with an amine oxide surfactant has its viscosity broken with a composition containing naturally-occurring fatty acids in canola oil reacted with a water soluble base such as NaOH, KOH, NH4OH, and the like with an alkali halide salt such as CaCl2, MgCl2, NaCl, NH4Cl and the like.

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