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:
Jul. 14, 2015
Filed:
Jan. 14, 2011
Huanquan Sun, Dongying, CN;
Zhenquan LI, Dongying, CN;
Xulong Cao, Dongying, CN;
Guangsu Huang, Chengdu, CN;
Xinwang Song, Dongying, CN;
Xiaohong Cui, Dongying, CN;
Kun Liu, Dongying, CN;
Jing Zheng, Chengdu, CN;
Xiaoyan Chen, Dongying, CN;
Zhiqing Su, Chengdu, CN;
Zuming Jiang, Chengdu, CN;
Jinrong Wu, Chengdu, CN;
Huanquan Sun, Dongying, CN;
Zhenquan Li, Dongying, CN;
Xulong Cao, Dongying, CN;
Guangsu Huang, Chengdu, CN;
Xinwang Song, Dongying, CN;
Xiaohong Cui, Dongying, CN;
Kun Liu, Dongying, CN;
Jing Zheng, Chengdu, CN;
Xiaoyan Chen, Dongying, CN;
Zhiqing Su, Chengdu, CN;
Zuming Jiang, Chengdu, CN;
Jinrong Wu, Chengdu, CN;
GEOSCIENCE RESEARCH INSTITUTE OF SHENGLI OILFIELD BRANCH, SINOPEC GEOSCIENCE RESEARCH INSTITUTE, Dongying, CN;
SICHUAN UNIVERSITY, Chengdu, CN;
Abstract
The present invention relates to a new type of oil displacement agent and the process for preparing the same. The oil displacement agent is formed of a polyacrylamide-based polymer characterized by a partly crosslinked and partly branched structure, wherein said polyacrylamide-based polymer is obtained by aqueous copolymerization of acrylamide and N,N-dimethylaminoethyl methacrylate as a functional monomer, in the presence of a redox initiator system.