Ping Yu

Person

  • Beijing, CN

Patents Grantslast 30 patents

  • Information Patent Grant

    Cementing plug

    • Patent number 10,808,496
    • Issue date Oct 20, 2020
    • China National Petroleum Corporation
    • Hongying Zhang
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    CEMENTING PLUG

    • Publication number 20180313186
    • Publication date Nov 1, 2018
    • CHINA NATIONAL PETROLEUM CORPORATION
    • Hongying Zhang
    • E21 - EARTH DRILLING MINING