Tender rig
Tender assisted rigs are an existing type of development drilling, workover or plug and abandonment rig. However, it is the only design that can operate in both shallow and deepwater. It is recognized in the industry as one of the most efficient and economical types of rig for development, work over or plug and abandonment. They are composed of a tender vessel and self-contained drilling rigs. The tender vessel is typically equipped with storage facilities, living quarters, power generation facilities, cranes, and helideck. Tender vessels are typically flat bottom barges or semi-submersible, however in some instances, it a jack up- or semi-submersible rig or liftboat was used.