A system and corresponding method for decommissioning an offshore platform (fig 1, 10), the offshore platform comprising a topside (fig 1, 12) and a support structure (fig 1, 14). The system comprises a topside lifting unit adapted to lift the topside from the support structure, a support structure lifting unit adapted to lift the support structure from the water such that the support structure is supported by the vessel, and a vessel 100 configured to interchangeably receive the topside lifting unit and the support structure lifting unit. The vessel comprises a hull 110 which is adapted to accommodate an installed support structure, for example by incorporating a slot 112, and a ballasting system for lifting the topside. The vessel 100 may further comprise an energy recovery system comprising turbines (fig 2c, 118a) mounted in ducts (fig 2c, 118) below the waterline.
Offshore decommissioning vessel and methods of use
2019-01-09
Patent
Electronic Resource
English
IPC: | B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS |
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