Patents by Inventor Zhenfeng Ma

Zhenfeng Ma 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).

  • TEMPERATURE AND SALINITY TOLERANT MAGNETIC NANOFLUID, PREPARATION METHOD AND USE THEREOF
    Publication number: 20250182940
    Abstract: The present invention belongs to the technical field of functional nanomaterials and petrochemicals, and proposes a temperature and salinity tolerant magnetic nanofluid, preparation method and use thereof, wherein the nanofluid comprises: magnetic core-shell structured nanoparticles Fe3O4@TiO2, with a content of 0.01-0.2 wt %, and water. The magnetic nanofluid is temperature and salinity resistant, and the magnetic core-shell structured nanoparticles Fe3O4@TiO2 are characterized in having small particle sizes and uniform dispersion, and are recyclable and reusable, and the recycling rate by using magnet after imbibition displacement experiments is as high as 96%, and the present invention provides an efficient solution for the huge problem in high efficiency development of ultra-low permeability reservoirs.
    Type: Application
    Filed: March 8, 2024
    Publication date: June 5, 2025
    Inventors: Mingwei ZHAO, Caili DAI, Zhenfeng MA, Yining WU, Lin LI, Zhongzheng XU, Mingwei GAO
  • Mussel biomimetic heat-resistant and salt-tolerant thickener, preparation method therefor, and gel fracturing fluid, preparation method and use thereof
    Patent number: 12195670
    Abstract: The present discloses a mussel biomimetic heat-resistant and salt-tolerant thickener and a preparation method therefor, a gel fracturing fluid and a preparation method and use thereof.
    Type: Grant
    Filed: February 28, 2024
    Date of Patent: January 14, 2025
    Assignee: China University of Petroleum (East China)
    Inventors: Mingwei Zhao, Zhongzheng Xu, Caili Dai, Lin Li, Yining Wu, Zhenfeng Ma, Mingwei Gao