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:
Apr. 04, 2017
Filed:
Oct. 25, 2011
Applicants:
Janice Jianzhao Wang, Yorktown Heights, NY (US);
Jun Zheng, Morris Plains, NJ (US);
David Farrar, Walk Idle, GB;
Osama M. Musa, Kinnelon, NJ (US);
Inventors:
Janice Jianzhao Wang, Yorktown Heights, NY (US);
Jun Zheng, Morris Plains, NJ (US);
David Farrar, Walk Idle, GB;
Osama M. Musa, Kinnelon, NJ (US);
Assignee:
ISP INVESTMENTS LLC, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/12 (2006.01); E21B 43/26 (2006.01); C04B 24/16 (2006.01); C04B 24/26 (2006.01); C09K 8/24 (2006.01); C09K 8/487 (2006.01); C09K 8/588 (2006.01); C09K 8/68 (2006.01); C09K 8/88 (2006.01); C08F 220/18 (2006.01); C08F 220/56 (2006.01); C08F 220/58 (2006.01); E21B 7/00 (2006.01); E21B 33/13 (2006.01); E21B 43/16 (2006.01); C04B 103/00 (2006.01);
U.S. Cl.
CPC ...
C09K 8/12 (2013.01); C04B 24/163 (2013.01); C04B 24/2641 (2013.01); C04B 24/2652 (2013.01); C04B 24/2688 (2013.01); C08F 220/18 (2013.01); C08F 220/56 (2013.01); C08F 220/58 (2013.01); C09K 8/24 (2013.01); C09K 8/487 (2013.01); C09K 8/588 (2013.01); C09K 8/68 (2013.01); C09K 8/882 (2013.01); E21B 7/00 (2013.01); E21B 33/13 (2013.01); E21B 43/16 (2013.01); E21B 43/26 (2013.01); C04B 2103/0079 (2013.01);
Abstract
A salt-tolerant, thermally-stable rheology modifier and, in particular, a rheology modifier for applications in oilfield well-bore fluids. In accordance with one aspect, the rheology modifier comprises a terpolymer of acrylamide, 2-acrylamido-2-methyl-propanesulfonic acid (AMPS) and a long-chain alkyl acrylate wherein the terpolymer is prepared by dispersion polymerization.