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Ping Yu

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  • Beijing, CN
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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