Borate cross-linking solutions

Details Borate cross-linking solutions Borate cross-linking solutions

1992-08-11

1993-10-12

Geist, Gary

Compositions

Leather or fur treating

166294, E21B 4326

Patent

active

052522350

ABSTRACT:
A cross-linking system using boron alpha-hydroxy carboxylic acid salts is shown for use in a water based well treating fluid. The cross-linker will gel the water based fluid usually after a delay at a relatively neutral pH. The cross-linker is provided as a concentrated stable solution containing borate ion as boric acid in a concentration of from less than 1% up to 25% by weight. The cross-linking solution additionally may contain from 1% to 10% of EDTA and/or Glycerine, however, without these additives the cross-linking solution is stable through temperature changes and freeze-and-thaw cycles. Water based fracturing fluid is shown using galactomannan guar polymers, hydroxypropyl guar polymers or derivatives thereof.

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