Patents Assigned to Unit Corporation
  • Box-on-box self-stacking substructure for a drill rig
    Patent number: 9488014
    Abstract: Disclosed is a drill rig having two master skids. Wherein prior to assembly of the drill rig, the master skids include a base box structure and a supported box structure arranged in a nested relationship. Additionally, the base box structures house hydraulic components and support components necessary to raise and support the supported box structure at an operational position. Further, the base box structures includes hydraulic components necessary to raise the drill rig mast to an operational position.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: November 8, 2016
    Assignee: Unit Corporation
    Inventors: Joseph Michael Sparkman, Charles Vora, Aaron Chang