Earth boring – well treating – and oil field chemistry – Well treating – Contains inorganic component other than water or clay
Reexamination Certificate
2009-10-06
2011-10-04
Kugel, Timothy J. (Department: 1765)
Earth boring, well treating, and oil field chemistry
Well treating
Contains inorganic component other than water or clay
C166S305100, C507S203000, C507S209000, C507S211000, C507S219000, C507S271000
Reexamination Certificate
active
08030254
ABSTRACT:
A method includes providing a wellbore treatment fluid having a divalent brine and an amount of polymer and lowering a pH value of the treatment fluid. The method further includes retaining the treatment fluid at the lower pH value until the polymer achieves a primary hydration value. The method further includes adding a cross-linking agent and a cross-linking delay agent to the treatment fluid. The cross-linking agent includes zirconium and/or titanium, and the cross-linking delay agent is a polyol. The method further includes performing a wellbore treatment with the treatment fluid.
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Abad Carlos
Christanti Yenny
Gadiyar Balkrishna
Phatak Alhad
Kugel Timothy J.
Matthews David G.
Schlumberger Technology Corporation
Warfford Rodney V.
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