Patents by Inventor Zhiqing Su

Zhiqing Su has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polyacrylamide-based symmetric branched polymer surfactant and a process for preparing the same and use thereof
    Patent number: 12331246
    Abstract: A polyacrylamide-based symmetric branched polymer surfactant and a process for preparing the same and use thereof are provided. The surfactant has an acrylamide structure unit, an anionic monomer structure unit, an optional non-ionic monomer structure unit, a branched structure unit, and an optional cationic monomer structure unit. The branched structure unit has at least one of structures represented by formula (1) or formula (2): The polymer surfactant can realize both the high viscosity of the aqueous solution and the low oil water interfacial tension, and can be used as the oil displacement agent in the tertiary oil recovery.
    Type: Grant
    Filed: October 26, 2021
    Date of Patent: June 17, 2025
    Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, SHANGHAI RESEARCH INSTITUTE OF PETROCHEMICAL TECHNOLOGY, SINOPEC
    Inventors: Zhiqing Su, Yingcheng Li, Yanmin Xia, Hui Sun, Hui Xu, Yixing Zhu, Lan Wang
  • POLYACRYLAMIDE-BASED SYMMETRIC BRANCHED POLYMER SURFACTANT AND A PROCESS FOR PREPARING THE SAME AND USE THEREOF
    Publication number: 20230392069
    Abstract: A polyacrylamide-based symmetric branched polymer surfactant and a process for preparing the same and use thereof are provided. The surfactant has an acrylamide structure unit, an anionic monomer structure unit, an optional non-ionic monomer structure unit, a branched structure unit, and an optional cationic monomer structure unit. The branched structure unit has at least one of structures represented by formula (1) or formula (2): The polymer surfactant can realize both the high viscosity of the aqueous solution and the low oil water interfacial tension, and can be used as the oil displacement agent in the tertiary oil recovery.
    Type: Application
    Filed: October 26, 2021
    Publication date: December 7, 2023
    Inventors: Zhiqing SU, Yingcheng LI, Yanmin XIA, Hui SUN, Hui XU, Yixing ZHU, Lan WANG
  • Oil displacement agent and process for preparing the same
    Patent number: 9080096
    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.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: July 14, 2015
    Assignees: GEOSCIENCE RESEARCH INSTITUTE OF SHENGLI OILFIELD BRANCH, SINOPEC GEOSCIENCE RESEARCH INSTITUTE, SICHUAN UNIVERSITY
    Inventors: Huanquan Sun, Zhenquan Li, Xulong Cao, Guangsu Huang, Xinwang Song, Xiaohong Cui, Kun Liu, Jing Zheng, Xiaoyan Chen, Zhiqing Su, Zuming Jiang, Jinrong Wu
  • NOVEL OIL DISPLACEMENT AGENT AND PROCESS FOR PREPARING THE SAME
    Publication number: 20110178257
    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 polyaclylamide-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.
    Type: Application
    Filed: January 14, 2011
    Publication date: July 21, 2011
    Applicants: Geoscience Research Institute of Shengli Oilfield Branch, SINOPEC, Sichuan University
    Inventors: Huanquan Sun, Zhenquan Li, Xulong Cao, Guangsu Huang, Xinwang Song, Xiaohong Cui, Kun Liu, Jing Zheng, Xiaoyan Chen, Zhiqing Su, Zuming Jiang, Jinrong Wu