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

1995-05-11

1997-08-19

Haley, Jacqueline

Earth boring, well treating, and oil field chemistry

Well treating

166308, 2523153, 507209, 507213, E21B 4326

Patent

active

056588615

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.

REFERENCES:
patent: 3215634 (1965-11-01), Walker
patent: 4619776 (1986-10-01), Mondshine
patent: 4919209 (1990-04-01), King
patent: 5082579 (1992-01-01), Dawson
patent: 5145590 (1992-09-01), Dawson
patent: 5160643 (1992-11-01), Dawson

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