Patents Assigned to Helmerich & Payne International Drilling Company
  • Tank storage and agitation system
    Patent number: 5944418
    Abstract: A tank system for storage and agitation of fluids. A tank includes cylindrical walls, a spherical bottom and an open top. A combined cover and walkway above the open top is parallel to the diameter of the cylindrical tank. A vent stack extending from the combined cover and walkway vents fumes from the cylindrical tank. A space is provided between the cover and the open top of the tank for fresh air intake.
    Type: Grant
    Filed: January 15, 1998
    Date of Patent: August 31, 1999
    Assignee: Helmerich & Payne International Drilling Company
    Inventors: Alan Orr, Bernard J. Cook