Patents Assigned to Wood George & Company
  • Inside blowout preventer
    Patent number: 4403628
    Abstract: An inside blowout preventer including a valve seat pocket and a replaceable valve seat, the valve seat having a lip to bear the longitudinal back pressure in the presence of blowout type pressures from below without causing outward pressure of the pocket seat which cause distortions of the pin end in which the pocket is located.
    Type: Grant
    Filed: January 21, 1981
    Date of Patent: September 13, 1983
    Assignee: Wood George & Company
    Inventor: Amrik S. Nijjar