TREA

Petroleum Designers, Inc.

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  • Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sealing system for pressurized flanged joints
    • Patent number 4,410,186
    • Issue date Oct 18, 1983
    • Petroleum Designers, Inc.
    • Elwood K. Pierce
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Well casing suspension system
    • Patent number 4,295,665
    • Issue date Oct 20, 1981
    • Petroleum Designers, Inc.
    • Elwood K. Pierce
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Pressure balanced gate valve having selective actuator systems
    • Patent number 4,230,299
    • Issue date Oct 28, 1980
    • Petroleum Designers, Inc.
    • Elwood K. Pierce
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Expanding gate valve
    • Patent number 4,179,099
    • Issue date Dec 18, 1979
    • Petroleum Designers, Inc.
    • Elwood K. Pierce
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

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