Photos: Pioneering Spirit Hoists 11,000 Tonne Jacket in a Single Lift

Allseas’ substantial heavy-lift ship Pioneering Spirit has actually gotten rid of an 11,000-tonne system coat from Repsol’s Gyda area, among the heaviest jacket-lift work ever before finished unharmed.

Pioneering Spirit, the globe’s biggest vessel by variation, was purpose-built for 2 specialized jobs – laying pipeline and also removing/installing system topsides. She has a distinct fast-lift hydraulic system on 2 onward pontoons, which she utilizes to swiftly raise and also get rid of a whole topside component in a solitary advancement (as much as 48,000 tonnes).

Until lately, nevertheless, she might not raise coats. To address that trouble, Allseas appointed 2 gigantic training beam of lights to install on Pioneering Spirit’s demanding, transforming her right into a 20,000-tonne drifting sheerlegs when required. Uniquely, the legs are pivoted and also geared up with a jacking system that reduces them back onto deck for transportation. This will certainly enable the vessel to get a coat and also lay it level (or at an angle) prior to heading back to port. The beam of lights provide a brand-new function to her extensive demanding, which was formerly established for mega-scale pipelay procedures.

At Gyda, Allseas’ range of job consisted of eliminating both the 18,000 tonne system and also the 11,000 tonne coat. In development of the work, the group made unique bearing braces and also lift trunnions to take the tons of the system. Over the period of 12 days in May, Pioneering Spirit filled out the system and also relevant devices, after that supplied it to the quay at Aker Solutions’ scrapyard in Stord, Norway.

To plan for elimination of the coat, the framework’s 24 structure stacks were reduced listed below seabed degree. Hoist obstructs linked to the training beam of lights were linked to pre-installed rigging and also the whole framework was brought up and also planned for transportation. The coat might not maintain the tons if set flat, so Pioneering Spirit lugged it back right into port in a near-vertical setting. On Tuesday early morning, the coat was put down straight onto the quayside beside the topside component.

All pictures politeness Allseas

Over the program of the year to day, Pioneering Spirit has actually raised and also carried greater than 90,000 tonnes of deactivated and also brand-new overseas centers, consisting of both coats and also topsides. Later this year, it will certainly handle a work in the overseas wind market, setting up a coat and also a transmission system for a wind ranch in theGerman North Sea