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Li Chen

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  • Guanghan, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    WD sidewall coring tool
    • Patent number 9,631,431
    • Issue date Apr 25, 2017
    • DRILLING & PRODUCTION ENGINEERING TECHNOLOGY RESEARCH INSTITUTE OF CNPC CHUAN...
    • Li Chen
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    Particle drilling method
    • Publication number 20180106112
    • Publication date Apr 19, 2018
    • CCDC PETROLEUM DRILLING & PRODUCTION TECHNOLOGY CO., LTD.
    • Weicheng Li
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    WD Sidewall Coring Tool
    • Publication number 20150047909
    • Publication date Feb 19, 2015
    • Li Chen
    • E21 - EARTH DRILLING MINING