Delayed borate crosslinked fracturing fluid having increased tem

Details Delayed borate crosslinked fracturing fluid having increased tem Delayed borate crosslinked fracturing fluid having increased tem

1994-03-15

1995-08-29

Suchfield, George A.

Wells

Processes

Placing fluid into the formation

166300, 507266, 507273, 507922, 507924, E21B 43267

Patent

active

054452236

ABSTRACT:
The crosslinking of galactomannan gum fracturing fluids by borate ion is delayed for high-temperature applications by encapsulating the boron with a polymer coating. The crosslink-delay time is further adjusted by varying the concentration of an organic polyol. The polyol also acts as a stabilizer for the crosslinked fluid at elevated temperatures. Low pumping friction pressures are achieved by the delay in the crosslinking with the boron available at high temperatures to add high temperature stability to the fracturing fluid at temperatures ranging up to about 350.degree. F.

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patent: 5089149 (1992-02-01), Ridland et al.
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patent: 5164009 (1992-11-01), Gupta et al.
patent: 5226481 (1993-07-01), Le et al.
patent: 5259455 (1993-11-01), Nimerick et al.

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