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:
Sep. 22, 2015
Filed:
Feb. 18, 2014
Conocophillips Company, Houston, TX (US);
University of Kansas, Lawrence, KS (US);
Ahmad Moradi-Araghi, Bixby, OK (US);
James H. Hedges, Bartlesville, OK (US);
David R. Zornes, Bartlesville, OK (US);
Riley B. Needham, Bartlesville, OK (US);
Huili Guan, Lawrence, KS (US);
Jenn-Tai Liang, Lawrence, KS (US);
Cory Berkland, Lawrence, KS (US);
James P. Johnson, Bartlesville, OK (US);
Min Cheng, Bartlesville, OK (US);
Faye Lynn Scully, Bartlesville, OK (US);
ConocoPhillips Company, Houston, TX (US);
The University of Kansas, Lawrence, KS (US);
Abstract
The invention is directed to long lasting crosslinked water-soluble swellable polymers, methods for making same, and their uses. More particularly, the invention relates to a composition comprising expandable polymeric particles having cationic sites as well as labile crosslinkers and stable crosslinkers, said particle mixed with a fluid. A particularly important use is as an injection fluid in petroleum production, where the expandable polymeric particles are injected into a target zones in the reservoirs and when the heat and/or a suitable pH in the reservoir cause degradation of the labile crosslinker and when the particle expands, the cationic sites in the polymer adsorb to negative sites of the rock in the formation, thus diverting water to lower permeability regions and improving oil recovery. However, many other uses are possible.