Acid thickeners and uses thereof

Details Acid thickeners and uses thereof Acid thickeners and uses thereof

2006-06-13

2006-06-13

Tucker, Philip C. (Department: 1712)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S242000, C507S132000, C507S922000, C507S933000, C510S433000, C516S102000, C166S307000, C166S308200

Reexamination Certificate

active

07060661

ABSTRACT:
The present invention generally relates to aqueous, acidic compositions thickened with an amidoamine oxide gelling agent and/or viscoelastic surfactant of the general formula I:wherein R1is a saturated or unsaturated, straight or branched chain aliphatic group of from about 7 to about 30 carbon atoms, R2is a divalent alkylene group of 2–6 carbon atoms which may be linear or branched, substituted or unsubstituted, and R3and R4are independently C1–C4alkyl or hydroxyalkyl groups or together they form a heterocyclic ring of up to six members, and R5is hydrogen or a C1–C4alkyl or hydroxyalkyl group. The aforementioned gelling agents advantageously provide gels that do not undergo phase separation over extended periods of time and exhibit high heat stability. The thickened acid gels of the invention have applications in household and industrial cleaners and degreasers, oilfield stimulation applications and the like.

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