The rig is a self-elevating cantilever type mobileoffshore drilling unit with three triangular lattice-type legs which are 234 ft (71 m) long.
Drydocks World modified three 160-metric ton (176-ton) spud cans: the program included replacement of cathodic protection, painting, placing height markings, performing an inclination experiment, and updating the rig’s operating manuals. The yard replaced about 55 metric tons (60 tons) of steel in the tanks.
Additional tasks included a major refurbishment of the accommodation, dismantling and overhaul of the rig’s three cranes, replacement of high-pressure Koomey lines, and a revamp of pipes around the rig.
Following an engineering study improvements were made to ventilation in the sewage treatment plant and transformer room. Also undergoing an overhaul were the cantilever skidding gears, air hoists, air tuggers, the raw water tower elevation system, gears and bearings, and dump and equalizing valves.
Other work included MPI inspection of legs, painting of the derrick and blasting and painting of hull, tanks and mud pits.