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Padmasiri Daya Seneviratne

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  • Fullerton, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Dual ball upper internal blow out preventer valve
    • Patent number 8,752,653
    • Issue date Jun 17, 2014
    • National-Oilwell Varco, L.P.
    • Padmasiri Daya Seneviratne
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Triple valve blow out preventer
    • Patent number 7,287,544
    • Issue date Oct 30, 2007
    • Varco I/P, Inc.
    • Padmasiri Daya Seneviratne
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Internal blow out preventer ball and seat
    • Patent number 7,121,295
    • Issue date Oct 17, 2006
    • Varco I/P, Inc.
    • Padmasiri Daya Seneviratne
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Washpipe assembly
    • Patent number 6,994,174
    • Issue date Feb 7, 2006
    • Varco I/P, Inc.
    • Padmasiri Daya Seneviratne
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Washpipe assembly
    • Patent number 6,725,949
    • Issue date Apr 27, 2004
    • Varco I/P, Inc.
    • Padmasiri Daya Seneviratne
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Apparatus and method for rapid replacement of upper blowout preventers
    • Patent number 6,276,450
    • Issue date Aug 21, 2001
    • Varco International, Inc.
    • Padmasiri Daya Seneviratne
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Pipe spinner
    • Patent number 4,423,645
    • Issue date Jan 3, 1984
    • Varco International, Inc.
    • Roderick K. Abbott
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Marine platform jacket jack
    • Patent number 4,367,056
    • Issue date Jan 4, 1983
    • Varco International, Inc.
    • Padmasiri D. Seneviratne
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Internal elevator
    • Patent number 4,320,915
    • Issue date Mar 23, 1982
    • Varco International, Inc.
    • Roderick K. Abbott
    • B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

  • Information Patent Application

    DUAL BALL UPPER INTERNAL BLOW OUT PREVENTER VALVE
    • Publication number 20110226485
    • Publication date Sep 22, 2011
    • National-Oilwell Varco, L.P.
    • Padmasiri Daya Seneviratne
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    Triple valve blow out preventer
    • Publication number 20060191679
    • Publication date Aug 31, 2006
    • Padmasiri Daya Seneviratne
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    Internal blow out preventer ball and seat
    • Publication number 20050081918
    • Publication date Apr 21, 2005
    • Padmasiri Daya Seneviratne
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    Washpipe assembly
    • Publication number 20040177971
    • Publication date Sep 16, 2004
    • Padmasiri Daya Seneviratne
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    Washpipe assembly
    • Publication number 20030051883
    • Publication date Mar 20, 2003
    • Padmasiri Daya Seneviratne
    • E21 - EARTH DRILLING MINING