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:
Aug. 31, 2010
Filed:
May. 07, 2008
Michael D. Parris, Richmond, TX (US);
Andrey Mirakyan, Houston, TX (US);
Yiyan Chen, Sugat Land, TX (US);
Carlos Abad, Richmond, TX (US);
Michael D. Parris, Richmond, TX (US);
Andrey Mirakyan, Houston, TX (US);
Yiyan Chen, Sugat Land, TX (US);
Carlos Abad, Richmond, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
Methods comprising preparing an aqueous mixture of an anionic polymer, a charge screening surfactant, and a borate crosslinker, wherein the mixture has a conductivity less than 10 mS/cm, injecting the mixture down a wellbore, and gelling the mixture. An embodiment of the aqueous mixture can also include tetramethylammonium chloride as a clay stabilizer and a metal crosslinker such as a complex of zirconium and an amino acid ligand system. An embodiment can effectively provide borate crosslinking of an anionic polymer in a low-ionic-strength fluid system, without sacrificing ultimate gel strength or thermal persistence of the metal crosslinked polymer.