Process to prepare borozirconate solution and use as cross-linker in hydraulic fracturing fluids
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United States of America Patent
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Dec 14, 2010
Grant Date -
Jun 11, 2009
app pub date -
Dec 11, 2007
filing date -
Dec 11, 2007
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Abstract
A process to prepare a stable solution of a borozirconate complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting zirconium complex with alkanolamine, then glycerol and water, then with a boron compound. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at temperatures of 275° F. (135° C.) and higher in the formation.
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