Based on the proven NG-2500X and NG-1800X designs, the NG-5500X-LD is a solution for light drilling and well intervention in a large number of mature fields in the Southern North Sea,Middle East, and Southeast Asia. The conditions of these fields are characterized by water depths of up to 80 m (262 ft) except for the Southern North Sea, which reaches up to 50 m (164 ft).
Until now this was the domain of classic drilling jackups and tender barges with associated day rates and operational restrictions. GustoMSC claims the new design bridges the gap between the successful shallow to midwater service units and the full-fledgeddrilling rigs.
The unit can remain offshore when adverse weather conditions occur, resulting in more workable days, improved efficiency, and reduced non-productive hours during operational charters. Other features include good maneuverability (DP-2), diagonal pre-loading, a transit speed of up to 8 knots, and added safety and accuracy when using the variable frequency drive controlled jacking system.
The 1,200-sq m (12,917-sq ft) main deck allows for flexible use while the cantilever featuring the X-Y skidding system provides a large drilling envelope of 18.3 m x 7.9 m (60 ft x 26 ft) and additional deck space as it raises the entire cantilever and drill floor structure above the main deck by around 3.6 m (12 ft). This envelop ensures access to a vast majority of brownfield platform layouts, the company claims.
With 250 tons of hook load at 60 ft and up to 350 tons (770 kips) at 50 ft the rig can perform light drilling operations with a drilling depth of 12,000 ft (3,658 m).
The hull measures 87.5 m (287 ft) in length, 42 m (138 ft) in width, and 8 m (26 ft) in depth. It can accommodate 90 persons on board.