Patent ID: 9027287
Filing Date: 2015-05-12
Classification: E04H,E21B

Abstract:
1. A drilling rig assembly comprising: a collapsible substructure movable between stowed and deployed positions, the collapsible substructure including: a mast having a lower mast section pivotally connected above the drill floor, and movable between a generally horizontal position to a position above the drill floor; a cantilever having a lower end and an upper end, the lower end being pivotally connected to the drill floor framework, the upper end movable between a stowed position below the drill floor and a deployed position above the drill floor; a raising cylinder pivotally connected at one end to the base box and having an opposite articulating end; the raising cylinder being selectively extendable relative to the pivotal connection at the base box; the articulating end of the raising cylinder connectable to the mast such that extension of the raising cylinder moves the mast from a generally horizontal position above the drill floor to a position above the drill floor; and, the articulating end of the raising cylinder connectable to the upper end of the cantilever such that extension of the raising cylinder raises the drilling substructure into the deployed position.