Patent ID: 8935901
Filing Date: 2015-01-20
Classification: E04B,E04H,E21B

Abstract:
1. A method, comprising: attaching a first mast section to a support structure using a first plurality of fasteners located on the support structure; wherein a lower portion of the support structure is connected to, and located above an opening in, a platform comprising a rig floor; and wherein the first mast section has a line, a hook, and a pulley, with the line operably coupled to the pulley and connected to a hoist attached to the platform; lowering the hook, using the hoist, in a downward direction away from the pulley and through the opening in the rig floor; attaching the hook to a second mast section located below the rig floor; raising the hook and the second mast section, using the hoist, in an upward direction towards the pulley and through the opening in the rig floor; connecting the first mast section to the second mast section; securing the first mast section and the second mast section with an overhead support located above the first mast section and connected to the first mast section; detaching the first mast section from the support structure; raising the first mast section and the second mast section away from the rig floor, using the overhead support; and attaching the second mast section to the first plurality of fasteners.