Patents by Inventor Huifei MAO

Huifei MAO 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).

  • Publication number: 20240327699
    Abstract: The present invention pertains to the field of oilfield stimulation technologies for oil and gas field development, in particular to an instant soluble temperature and salt resistant polyacrylamide and the preparation method and application thereof, and the polyacrylamide is modified by adding rigid temperature and salt resistant monomer containing benzene ring and cationic fluorinated hydrophobic monomer on the basis of acrylamide monomer and sodium acrylate monomer, and then polymerized to obtain instant soluble temperature and salt resistant polyacrylamide. The temperature and salt resistant monomer containing benzene ring can improve the thermal stability and temperature and salt resistance of polyacrylamide, while the long-chain cationic fluorinated hydrophobic monomer can enhance the hydrophobicity of polymer. The comprehensive properties of polymer is improved by appropriate intermolecular association.
    Type: Application
    Filed: July 25, 2023
    Publication date: October 3, 2024
    Applicants: Chengdu LEPS Technology Co., Ltd, Southwest Petroleum University
    Inventors: Jianchun GUO, Shan REN, Cong LU, Bin LIU, Shaobin ZHANG, Huifei MAO, Su DIAO, Xueshan YANG, Chaojun TANG, Junyao RAN, Guangyao YANG