Cross-linked well treating fluids
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United States of America Patent
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Oct 30, 2001
Grant Date -
N/A
app pub date -
Oct 12, 1999
filing date -
Oct 12, 1999
priority date (Note) -
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Abstract
The present invention provides improved cross-linked well treating fluids and methods for preparing and using the fluids in treating wells such as fracturing subterranean zones therein. The improved cross-linked treating fluids comprise water, a galactomannan gelling agent, a cross-linking agent for cross-linking the galactomannan gelling agent, and a viscosity stabilizing agent selected from the group consisting of formaldehyde, formic acid, or mixtures thereof. The viscosity stabilizing agent alters the properties of the well treating fluids and enables them to retain their viscosity over prolonged periods of time when compared to prior well treating fluids.
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