Crosslinked fracturing fluids
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United States of America Patent
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Oct 28, 1986
Grant Date -
N/A
app pub date -
Aug 9, 1985
filing date -
Jul 2, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed are hydraulic fracturing fluids of enhanced temperature stability containing boron crosslinked galactomannan polymers and methods of producing same. The temperature stability of fracturing fluids containing galactomannan polymers is increased by adding to the fracturing fluid a sparingly soluble borate having a slow solubility rate as defined herein. The sparingly soluble borate provides a pH in the range from about 8 to about 10, provides a source of boron for solublizing at elevated temperature thus enhancing the crosslinking of the galactomannan polymer, and it also decreases the leak-off properties of the fracturing fluid.
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