Patents by Inventor Guiru Liu

Guiru Liu 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).

  • Salt-tolerant polymer microsphere plugging agent and preparation method thereof
    Patent number: 11629282
    Abstract: A salt-tolerant polymer microsphere plugging agent and a preparation method thereof, the agent being made of white oil, fumed silica, acrylamide monomer, acrylic acid, sorbitan fatty acid ester, N,N?-methylene bisacrylamide, ammonium persulfate, sodium bisulfite, hydrophilic surfactant and water. The present general inventive concept synthesizes salt-tolerant polymer microspheres with ultra-low interfacial tension by adopting inverse phase emulsion polymerization. The prepared polymer microsphere plugging agent is a new type of polymer microspheres with ultra-low interfacial tension, such that the tension can reach 4.3×10?3 mN/m, and the salt tolerance can reach 50000 mg/L salinity, which improves the problem of low interfacial tension and poor salt tolerance in existing polymer microspheres.
    Type: Grant
    Filed: August 12, 2021
    Date of Patent: April 18, 2023
    Assignee: Shaanxi University of Science & Technology
    Inventors: Xiaojuan Lai, Guiru Liu, Lei Wang, Jinhao Gao, Xiaohu Liu, Zhiqiang Dang, Chu Mi, Jun Yin
  • SALT-TOLERANT POLYMER MICROSPHERE PLUGGING AGENT AND PREPARATION METHOD THEREOF
    Publication number: 20230050157
    Abstract: A salt-tolerant polymer microsphere plugging agent and a preparation method thereof, the agent being made of white oil, fumed silica, acrylamide monomer, acrylic acid, sorbitan fatty acid ester, N,N?-methylene bisacrylamide, ammonium persulfate, sodium bisulfite, hydrophilic surfactant and water. The present general inventive concept synthesizes salt-tolerant polymer microspheres with ultra-low interfacial tension by adopting inverse phase emulsion polymerization. The prepared polymer microsphere plugging agent is a new type of polymer microspheres with ultra-low interfacial tension, such that the tension can reach 4.3×10?3 mN/m, and the salt tolerance can reach 50000 mg/L salinity, which improves the problem of low interfacial tension and poor salt tolerance in existing polymer microspheres.
    Type: Application
    Filed: August 12, 2021
    Publication date: February 16, 2023
    Inventors: Xiaojuan Lai, Guiru Liu, Lei Wang, Jinhao Gao, Xiaohu Liu, Zhiqiang Dang, Chu Mi, Jun Yin