Patents by Inventor Yanxia Zhou

Yanxia Zhou 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).

  • Quantum dots based nanofluid for enhanced oil recovery in tight oil reservoir
    Patent number: 11718782
    Abstract: A compound for use in oil recovery includes a quantum dot and a zwitterionic surfactant. The quantum dot has a diameter no greater than 25 nm and the quantum dot is bonded to the zwitterionic surfactant. A nanofluid for use in oil recovery includes the compound described above and a fluid carrier. A method for recovering oil from a formation includes flooding the formation with a nanofluid. The nanofluid has a quantum dot diameter no greater than 25 nm bonded to a zwitterionic surfactant and a fluid carrier.
    Type: Grant
    Filed: December 31, 2020
    Date of Patent: August 8, 2023
    Assignee: University of North Dakota
    Inventors: Yanxia Zhou, Xu Wu, Julia Xiaojun Zhao, Hui Pu
  • QUANTUM DOTS BASED NANOFLUID FOR ENHANCED OIL RECOVERY IN TIGHT OIL RESERVOIR
    Publication number: 20210269702
    Abstract: A compound for use in oil recovery includes a quantum dot and a zwitterionic surfactant. The quantum dot has a diameter no greater than 25 nm and the quantum dot is bonded to the zwitterionic surfactant. A nanofluid for use in oil recovery includes the compound described above and a fluid carrier. A method for recovering oil from a formation includes flooding the formation with a nanofluid. The nanofluid has a quantum dot diameter no greater than 25 nm bonded to a zwitterionic surfactant and a fluid carrier.
    Type: Application
    Filed: December 31, 2020
    Publication date: September 2, 2021
    Inventors: Yanxia Zhou, Xu Wu, Julia Xiaojun Zhao, Hui Pu