US 11,884,881 B2
Delayed gelation of polymers
Huili Guan, Lawrence, KS (US); Cory Berkland, Lawrence, KS (US); Ahmad Moradi-Araghi, Bixby, OK (US); Jenn-Tai Liang, College Station, TX (US); Terry M. Christian, Bartlesville, OK (US); Riley B. Needham, Bartlesville, OK (US); and Min Cheng, Bartlesville, OK (US)
Assigned to CONOCOPHILLIPS COMPANY, Houston, TX (US); and UNIVERSITY OF KANSAS, Lawrence, KS (US)
Filed by ConocoPhillips Company, Houston, TX (US)
Filed on Jun. 10, 2022, as Appl. No. 17/838,142.
Application 17/079,877 is a division of application No. 14/847,734, filed on Sep. 8, 2015, granted, now 10,851,286, issued on Dec. 1, 2020.
Application 17/838,142 is a continuation of application No. 17/079,877, filed on Oct. 26, 2020, granted, now 11,384,279.
Claims priority of provisional application 62/081,950, filed on Nov. 19, 2014.
Prior Publication US 2022/0298409 A1, Sep. 22, 2022
Int. Cl. E21B 43/34 (2006.01); C09K 8/588 (2006.01); C09K 8/50 (2006.01); C09K 8/512 (2006.01)
CPC C09K 8/588 (2013.01) [C09K 8/50 (2013.01); C09K 8/512 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A delayed gelling composition, said composition made by:
a) sequentially combining ingredients comprising:
i) an expandable polymeric particle in an injection fluid, said particle comprising a copolymer of about 80-98 mole percent acrylamide and about 2-20 mole % sodium acrylate;
ii) at least one gel-delaying polymer; and
iii) a crosslinker;
b) thereby forming a delayed gelling composition without forming a separate nanogel.