Patent ID: 7819207
Filing Date: 2010-10-26
Classification: E21B

Abstract:
1. A compact mobile drilling rig, comprising: a one-piece drilling mast having an open side between first and second front mast rails, a base end, a top end, and configured for transport in one piece on a single drawworks trailer; a single drawworks trailer for transporting said one-piece drilling mast in a horizontal position thereon; a mechanism fixed to said single drawworks trailer and detachably coupled to said one-piece drilling mast for erecting said mast without the use of a crane to a vertical, free-standing position entirely supported upon said base end of said mast, wherein said mechanism for erecting is detachable from said one-piece drilling mast following said erecting; a support base for said one-piece drilling mast; a pipe-handling boom having a yoke for pivotally attaching said boom to a lower portion of said support base, for pivoting said boom from a horizontal pipe loading position upward to a vertical pipe connecting position in line with a well bore being drilled in a single operation to insert sections of said pipe into a drill string bisecting a straight line between and passing through said first and second front mast rails on line; a pivoting adjunct boom section attached to and parallel to said pipe-handling boom configured to pivot the pipe section in a horizontal plane and having at least first and second gripping jaws attached to said pivoting adjunct boom section and configured for grasping and supporting a section of pipe for handling by said pipe handling boom; and a traveling crown block having first and second extended length bat wing supports and an integrated top drive, said crown block configured for vertical movement along said open side between said first and second front rails of said one-piece drilling mast while supporting said drill string bisecting a straight line disposed at right angles between said first and second rails during drilling and assembly and disassembly of said drill string.