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:
Mar. 11, 2014
Filed:
Jun. 09, 2010
Ahmad Moradi-araghi, Bixby, OK (US);
James H. Hedges, Bartlesville, OK (US);
David R. Zornes, Bartlesville, OK (US);
Riley B. Needham, Bartesville, OK (US);
Huili Guan, Lawrence, KS (US);
Jenn-tai Liang, Lawrence, KS (US);
Cory Berkland, Lawrence, KS (US);
James P. Johnson, Houston, TX (US);
Min Cheng, Bartlesville, OK (US);
Faye L. Scully, Bartlesville, OK (US);
Ahmad Moradi-Araghi, Bixby, OK (US);
James H. Hedges, Bartlesville, OK (US);
David R. Zornes, Bartlesville, OK (US);
Riley B. Needham, Bartesville, OK (US);
Huili Guan, Lawrence, KS (US);
Jenn-Tai Liang, Lawrence, KS (US);
Cory Berkland, Lawrence, KS (US);
James P. Johnson, Houston, TX (US);
Min Cheng, Bartlesville, OK (US);
Faye L. Scully, Bartlesville, OK (US);
ConocoPhillips Company, Houston, TX (US);
University of Kansas, Lawrence, KS (US);
Abstract
The invention is directed to stable crosslinked water-soluble swellable polymers and methods for making same. More particularly, the invention relates to a composition comprising expandable polymeric particles having anionic sites and labile crosslinkers and stable crosslinkers, said particle mixed with a fluid and a cationic crosslinker that is capable of further crosslinking the particle on degradation of the labile crosslinker and exposure of the anionic sites so as to form a gel. A particularly important use is as an injection fluid in petroleum production, where the expandable polymeric particles are injected into target zone and when the heat and/or suitable pH of the target zone cause degradation of the labile crosslinker and the particle expands, the cationic crosslinker crosslinks the polymer to form a gel, thus diverting water to lower permeability regions and improving oil recovery.