WORK-OVER RIG ASSEMBLY AND METHODS THEREOF

摘要

A vessel is provided that is an improvement over previously disclosed jack-up rigs and lift boats. The vessel has at least three thrusters and is self-propelled. The vessel further comprises a sub-base structure (174) removably affixed to the transom of the vessel; a base structure (118) removably affixed to the sub-base structure; and a work-over rig (121) removably affixed to the base structure. Also provided herein are methods of using the crane and affixing the sub-base structure, base structure, and work-over rig to the vessel's transom.