Wells – Processes – Placing fluid into the formation
Reexamination Certificate
2006-02-14
2010-06-08
Bates, Zakiya W (Department: 3676)
Wells
Processes
Placing fluid into the formation
C166S300000, C166S305100
Reexamination Certificate
active
07730952
ABSTRACT:
A method for hydraulically fracturing a subterranean formation comprises introducing into the formation a cross-linking composition which comprises a zirconium triethanolamine complex, a tetra(hydroxyalkyl)ethylenediamine, water, a cross-linkable organic polymer, and optionally, a polyol. The method can be used for cross-linking organic polymers over a wide range of pH. By varying the composition and optionally adding a delay agent, the method provides flexibility in rate of cross-linking.
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Bates Zakiya W
DiTrani Angela M
E.I. duPont de Nemours and Company
Sanchez Kathryn M.
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