Polycationic viscoelastic compositions

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United States of America Patent

PATENT NO 8222455
APP PUB NO 20110190530A1
SERIAL NO

13018112

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Viscoelastic compositions are disclosed herein containing an effective amount of one or more random or structurally defined polycationic quaternary ammonium compounds for controlling the viscoelasticity of the composition. In one aspect, the present technology provides polycationic quaternary ammonium compounds that comprise bis-quaternary compound. The bis-quaternary compounds of the present technology can be symmetric or dissymmetric. In another aspect, the present technology provides viscoelastic well bore treatment fluids comprising water, and at least one polycationic quaternary ammonium compound that comprises a bis-quaternary compound. In another aspect, the present technology provides polycationic carboxylates. Preferred viscoelastic compositions of the present technology maintain viscoelasticity at a temperature greater than about 80° C., preferably greater than about 100° C. or 110° C. when the amount of the one or polycationic quaternary compounds is less than about 10% by weight based on the total weight of the composition.

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Patent Owner(s)

Patent OwnerAddress
STEPAN COMPANYNORTHFIELD ILLINOIS 60093

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Knox, Paul Kenosha, US 12 63

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