Patent ID: 9416595
Filing Date: 2016-08-16
CPC Classification: E21B

Claim Text:
1. A method, comprising: attaching a carriage support to a platform, the platform comprising a rig floor having an opening therein, with the carriage support located proximate the opening of the rig floor; attaching a drive carriage to the carriage support and the rig floor; operably coupling to the drive carriage a first mast section of a mast comprising a plurality of mast sections, wherein the first mast section is located above the opening of the rig floor; arranging a second mast section below the first mast section while the drive carriage is in a fixed vertical position relative to the carriage support; lowering, using the drive carriage, the first mast section through the opening of the rig floor while the drive carriage remains in the fixed vertical position relative to the carriage support; attaching the first mast section to the second mast section while the drive carriage remains in the fixed vertical position relative to the carriage support; and raising, using the drive carriage, the first mast section and the second mast section through the opening of the rig floor while the drive carriage remains in the fixed vertical position relative to the carriage support.