TREA

Zhaohui Shan

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  • The Woodlands, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Symmetrical seal
    • Patent number 9,988,850
    • Issue date Jun 5, 2018
    • Halliburton Energy Services, Inc.
    • Micheal B. Crawford
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    SYMMETRICAL HAR SEAL
    • Publication number 20150345226
    • Publication date Dec 3, 2015
    • Halliburton Energy Services Inc.
    • Michael B. Crawford
    • E21 - EARTH DRILLING MINING