Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2006-07-18
2006-07-18
Tucker, Philip C. (Department: 1712)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S211000, C507S219000, C507S241000, C507S271000, C507S273000, C507S921000, C507S922000, C507S903000, C166S308500
Reexamination Certificate
active
07078370
ABSTRACT:
It has been discovered that biodegradable and non-toxic chelant compositions can perform multiple beneficial functions in an aqueous fracturing fluid through the chelation of ions. Some of the multiple functions include various combinations of the following: demulsifier, demulsifier enhancer, scale inhibitor, crosslink delay agent, crosslinked gel stabilizer, enzyme breaker stabilizer, and the like. Some of the chelants used in the compositions include, but are not necessarily limited to, sodium polyaspartate; sodium iminodisuccinate; disodium hydroxyethyleneiminodiacetate (Na2HEIDA); sodium gluconate; sodium glucoheptonate; sugar alcohols; monosaccharides; disaccharides; and mixtures thereof.
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Baker Hughes Incorporated
Madan Mossman & Sriram P.C.
Tucker Philip C.
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