Catalyst for breaker system for high viscosity fluids

Details Catalyst for breaker system for high viscosity fluids Catalyst for breaker system for high viscosity fluids

E - Fixed Constructions

21

B

E21B 43/267 (2006.01) C09K 8/68 (2006.01) C09K 8/90 (2006.01)

Patent

CA 2071387

ABSTRACT OF THE DISCLOSURE A persulfate / catalyst breaker system is disclosed which effects controlled breaks of polysaccharide gelled fluids in the ambient temperature range without interfering with fluid performance. The catalyzing constituent of the breaker system comprises at least one member selected from the group of erythorbic acid or its salts, hydroxylamine hydrochloride, dihydroxymaleic acid and its salts, citric acid and its salts and a copper ion releasing compound.

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