Patent ID: 8875447
Filing Date: 2014-11-04
Classification: E21B

Abstract:
1. A support structure for use with a mobile rig, the support structure comprising: a mast portion, wherein the mast portion comprises a first beam extending vertically along a first side of the mast portion and a second beam extending vertically along a second side of the mast portion for guiding a drive mechanism and resisting a force imparted by the drive mechanism; a base portion, wherein the base portion defines a lateral boundary of an empty space for accommodating well control equipment, such that the mast portion extends essentially vertical above the base portion and is aligned with an axis of a wellbore; and a drive mechanism support frame, wherein the drive mechanism support frame comprises a first guide frame and a second guide frame, wherein the first guide frame comprises at least two parallel guide plates with at least two rollers extending therebetween, wherein the second guide frame comprises at least two parallel guide plates with at least two rollers extending therebetween, wherein the at least two rollers of the first guide frame contact the first beam, and wherein the at least two rollers of the second guide frame contact the second beam.