NG-3500X, which can operate in a water depth of up to 80 m (262 ft), is targeted at maintaining and making interventions in mature fields and associated infrastructure in the Middle East and Southeast Asia.
In these regions field conditions are characterized by deeper water and larger anticipated penetrations. Hitherto this was undertaken by conventional drilling jackups and work barges with associated rates/operational restrictions.
GustoMSC claims the NG-3500X provides a safe, stable, and solid platform to work from, designed with survival capability in mind. It 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 (and an optional DP system), a transit speed of up to 8 knots, and added safety when using the VSD jacking system.
In one guise the NG-3500X is a multi-purpose platform with various crane options for any type of service, from simple maintenance jobs, accommodation and support to light well intervention. Its large free main deck – around 1,200 sq m (12,916 sq ft) – is designed for flexibility in transporting equipment and materials to and from offshore locations, location of an additional accommodation block or modular well intervention spread.
The other version is for heavy well intervention and light drilling. The X-Y skidding system provides a large drilling envelope of 15.2 m x 7.3 m (50 ft x 24 ft) and additional deck space as it raises the entire cantilever and drill floor structure above the main deck by around 3.5 m (12 ft).
The 7.3-m (24-ft) transverse reach with full combined cantilever load should provide more flexibility for performing drilling operations, GustoMSC adds.
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