Patents Represented by Attorney Potomac Patent Group LLC

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  • Remote operated actuator system for drill string internal blowout preventer
    Patent number: 7950668
    Abstract: An air swivel ring includes a non-rotating member having an air inlet, a rotating member having an air outlet, and a split seal having a first sealing surface and coupled to one of the non-rotating member and the rotating member so that the first sealing surface on the seal is disposed proximate a second sealing surface on the other of the non-rotating member and the rotating member.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: May 31, 2011
    Assignee: Hydril USA Manufacturing LLC
    Inventors: Ryan Gustafson, Jonathan Bowen