TREA

John V. Fredd

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  • Dallas, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Valve
    • Patent number 4,537,383
    • Issue date Aug 27, 1985
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method and apparatus for controlling a well
    • Patent number 4,453,599
    • Issue date Jun 12, 1984
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method and system for well testing
    • Patent number RE31313
    • Issue date Jul 19, 1983
    • Otis Engineering Corporation
    • John V. Fredd
    • 166 - Wells
  • Information Patent Grant

    Well test apparatus
    • Patent number 4,289,201
    • Issue date Sep 15, 1981
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Equalizing ball valve member
    • Patent number 4,289,165
    • Issue date Sep 15, 1981
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Valve
    • Patent number 4,280,561
    • Issue date Jul 28, 1981
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method and system for well testing
    • Patent number 4,274,485
    • Issue date Jun 23, 1981
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Apparatus for and method of operating a well
    • Patent number 4,274,486
    • Issue date Jun 23, 1981
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Valve
    • Patent number 4,266,614
    • Issue date May 12, 1981
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Actuator
    • Patent number 4,252,143
    • Issue date Feb 24, 1981
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Actuator
    • Patent number 4,252,188
    • Issue date Feb 24, 1981
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Well test systems and methods
    • Patent number 4,252,195
    • Issue date Feb 24, 1981
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rod operated rotary well valve
    • Patent number 4,230,185
    • Issue date Oct 28, 1980
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Flapper valve
    • Patent number 4,216,830
    • Issue date Aug 12, 1980
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Well tools
    • Patent number 4,160,478
    • Issue date Jul 10, 1979
    • Otis Engineering Corporation
    • Michael B. Calhoun
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Thread chaser tool for contiguous straight and tapered thread runs
    • Patent number 4,117,563
    • Issue date Oct 3, 1978
    • Otis Engineering Corporation
    • John V. Fredd
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Reset and pulling tool for manipulating well safety valve
    • Patent number 4,051,899
    • Issue date Oct 4, 1977
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Go-devil storage and discharge assembly
    • Patent number 4,033,408
    • Issue date Jul 5, 1977
    • Continental Oil Company
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Telescoping pipe coupling with improved pressure seal connection th...
    • Patent number 3,994,516
    • Issue date Nov 30, 1976
    • Otis Engineering Corporation
    • John V. Fredd
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Safety valve for controlling flow in a flow conductor
    • Patent number 3,955,624
    • Issue date May 11, 1976
    • Continental Oil Company
    • John V. Fredd
    • E21 - EARTH DRILLING MINING