Patent ID: 8959874
Filing Date: 2015-02-24
Classification: E21B,F16B

Abstract:
1. A method to assemble a portable drilling rig, the method comprising: providing a pedestal structure on a rig floor; the pedestal structure comprising a lower pivot point, a lower attachment point, and an upper pivot point; aligning a mast structure and the pedestal structure; pinning a mast pivot point located at a lower end of the mast structure to the upper pivot point of the pedestal structure; pivoting the pedestal structure from a substantially horizontal position to a vertical position; moving the mast structure in a horizontal direction toward a center of the rig floor; securing the lower attachment point of the pedestal structure to a corresponding attachment point on the rig floor; erecting the mast structure from a substantially horizontal position to a vertical position about a pivot point between the mast structure and the pedestal structure; and securing the mast structure in a vertical position.