Patents by Inventor Haifang Zhao

Haifang Zhao 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).

  • GATE VALVE CAVITY REDUCER
    Publication number: 20230392704
    Abstract: A gate valve cavity reducer comprising a cavity reducer with an outer surface, a channel having an inner surface, and a plurality of bores extending through the cavity reducer body. Each of the plurality of bores extend radially from the inner surface of the cavity reducer to the outer surface of the cavity reducer. The cavity reducer is configured to be removed or inserted into a gate valve.
    Type: Application
    Filed: June 1, 2022
    Publication date: December 7, 2023
    Applicant: OIL STATES ENERGY SERVICES, L.L.C.
    Inventors: Jimmy Livingston, Haifang Zhao, Bob McGuire
  • FRAC MANIFOLD ISOLATION TOOL
    Publication number: 20220307362
    Abstract: A frac manifold isolation tool configured to connect to a zipper spool, and comprising a mandrel that is axially movable and a hydraulic setting tool configured to move the mandrel from an open position, in which fracturing fluid is allowed to flow from a zipper spool to a connected frac tree, to a closed position, in which the mandrel and its associated cup tool direct flow.
    Type: Application
    Filed: June 14, 2022
    Publication date: September 29, 2022
    Applicant: OIL STATES ENERGY SERVICES, L.L.C.
    Inventors: Jimmy Livingston, Haifang Zhao, Bob McGuire, Mickey Claxton, Danny Artherholt, Darin Grassmann