The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2011
Filed:
Oct. 06, 2009
Alhad Phatak, Houston, TX (US);
Yenny Christanti, Houston, TX (US);
Carlos Abad, Richmond, TX (US);
Balkrishna Gadiyar, Katy, TX (US);
Alhad Phatak, Houston, TX (US);
Yenny Christanti, Houston, TX (US);
Carlos Abad, Richmond, TX (US);
Balkrishna Gadiyar, Katy, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
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.