Patents by Inventor Leiju TIAN

Leiju TIAN 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).

  • PH sensitive water-absorbent resin suitable for oil well cement slurry and application thereof
    Patent number: 11136490
    Abstract: A pH sensitive water-absorbent resin suitable for oil well cement slurry and an application thereof are provided. The pH sensitive water-absorbent resin includes distilled water, a monomer, a mixed auxiliary agent, a crosslinking agent and an initiator, the amount of the monomer is 30% to 100% of the mass of the distilled water, the amount of the mixed auxiliary agent is 16% to 67% of the mass of the monomer, the amount of the crosslinking agent is 0.2% to 1% of the mass of the monomer, and the amount of the initiator is 0.4 to 1% of the mass of the monomer.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: October 5, 2021
    Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Yuhuan Bu, Chunyu Wang, Huajie Liu, Leiju Tian, Xinyang Guo
  • PH SENSITIVE WATER-ABSORBENT RESIN SUITABLE FOR OIL WELL CEMENT SLURRY AND APPLICATION THEREOF
    Publication number: 20200102486
    Abstract: A pH sensitive water-absorbent resin suitable for oil well cement slurry and an application thereof are provided. The pH sensitive water-absorbent resin includes distilled water, a monomer, a mixed auxiliary agent, a crosslinking agent and an initiator, the amount of the monomer is 30% to 100% of the mass of the distilled water, the amount of the mixed auxiliary agent is 16% to 67% of the mass of the monomer, the amount of the crosslinking agent is 0.2% to 1% of the mass of the monomer, and the amount of the initiator is 0.4 to 1% of the mass of the monomer.
    Type: Application
    Filed: May 25, 2018
    Publication date: April 2, 2020
    Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Yuhuan BU, Chunyu WANG, Huajie LIU, Leiju TIAN, Xinyang GUO