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Patents Grantslast 30 patents

  • Information Patent Grant

    High-temperature downhole devices
    • Patent number 7,720,323
    • Issue date May 18, 2010
    • Schlumberger Technology Corporation
    • Tsutomu Yamate
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    HIGH-TEMPERATURE DOWNHOLE DEVICES
    • Publication number 20090038794
    • Publication date Feb 12, 2009
    • SCHLUMBERGER TECHNOLOGY CORPORATION
    • TSUTOMU YAMATE
    • E21 - EARTH DRILLING MINING