TREA

John M. Clegg

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  • Bristol, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Steerable rotary drilling systems
    • Patent number 6,089,332
    • Issue date Jul 18, 2000
    • Camco International (UK) Limited
    • John D. Barr
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rotary drill bits
    • Patent number 6,089,336
    • Issue date Jul 18, 2000
    • Camco International (UK) Limited
    • Alex Nexton
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rotary drill bits
    • Patent number 5,819,860
    • Issue date Oct 13, 1998
    • Camco International Inc.
    • Alex Newton
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Steerable rotary drilling systems and method of operating such systems
    • Patent number 5,803,185
    • Issue date Sep 8, 1998
    • Camco Drilling Group Limited of Hycalog
    • John D. Barr
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method of operating a steerable rotary drilling system
    • Patent number 5,685,379
    • Issue date Nov 11, 1997
    • Camco Drilling Group Ltd. of Hycalog
    • John D. Barr
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rotary drill bits
    • Patent number 5,671,818
    • Issue date Sep 30, 1997
    • Camco Drilling Group Limited
    • Alex Newton
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Modulated bias units for steerable rotary drilling systems
    • Patent number 5,553,678
    • Issue date Sep 10, 1996
    • Camco International Inc.
    • John D. Barr
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rotary drill bits
    • Patent number 5,244,039
    • Issue date Sep 14, 1993
    • Camco Drilling Group Ltd.
    • Thomas A. Newton
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rotary drill bits
    • Patent number 5,186,268
    • Issue date Feb 16, 1993
    • Camco Drilling Group Ltd.
    • John M. Clegg
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rotary drill bits
    • Patent number 5,163,524
    • Issue date Nov 17, 1992
    • Camco Drilling Group Ltd.
    • Thomas A. Newton
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Notary drill bits
    • Patent number 5,119,892
    • Issue date Jun 9, 1992
    • Reed Tool Company Limited
    • John M. Clegg
    • E21 - EARTH DRILLING MINING