Patents Assigned to CNPS USA CORPORATION
  • Lost circulation test method for expandable geopolymers
    Patent number: 11851606
    Abstract: The disclosure includes a new test method of evaluating lost circulation prevention with expandable geopolymers. The expandable geopolymer is tested using a permeability plugging tester, slot disk, drilling fluid, and a piston to determine how much fluid is released from the test cell.
    Type: Grant
    Filed: October 28, 2021
    Date of Patent: December 26, 2023
    Assignees: CNPS USA CORPORATION, BEIJING HUAMEI INC., CHINA NATIONAL PETROLEUM CORPORATION
    Inventors: Weibin Zha, Meng Lu, Janine Shipman