Process for decomposing polysaccharides in alkaline aqueous systems
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United States of America Patent
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Oct 19, 1993
Grant Date -
N/A
app pub date -
Mar 2, 1992
filing date -
Mar 2, 1992
priority date (Note) -
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Abstract
Alkaline earth metal or transition metal peroxides are used as a delayed breaker in alkaline aqueous fluids containing a water soluble hydrophilic polysaccharide polymer hydrated therein. The peroxide is activated by increasing the temperature of the fluid. The invention is particularly useful for the delayed break of hydraulic fracturing fluids containing hydroxypropyl guar polymer.
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