Patent ID: 8555564

Claim:
A method of incrementally raising a rig floor, the method comprising: contacting one or more lifting cylinders, the one or more lifting cylinders attached to a base structure, with one or more rig floor load points on the rig floor positioned above the base structure; extending one or more arms of the one or more lifting cylinders against the one or more rig floor load points and raising the rig floor above the base structure a specified increment; inserting a first box between the base structure and the rig floor, wherein the rig floor is raised to a specified height; contacting one or more first box load points on the first box with the one or more lifting cylinders; extending the one or more arms of the one or more lifting cylinders and raising the rig floor above the base structure by a specified increment; and inserting one or more additional boxes between the base structure and the rig floor, wherein the rig floor is raised to a specified height.