Allseas is equipping Pioneering Spirit with a second distinctive raise system able to eradicating and putting in full offshore jackets weighing as much as 20,000 t in a single go. After a number of months of set up works, the sheer dimension of the “Jacket raise system” (JLS) is turning into obvious!
Recent actions have targeted on the “hang-off and upend system” (HOUS), the perform of which is to boost and tilt the 170-m lifting beams. The HOUS includes built-in upend programs, every with a pair of 50-m skid tracks fitted with “push-pull” mechanisms. Hydraulic cylinders drive the push-pull units alongside the tracks, transferring the beams up, whereas transom-mounted hang-off body (HoF) assemblies perform as hinges round which the beams rotate.
While the expertise is ground-breaking, the way in which the system works is fairly easy. After cuts are made to a jacket’s basis piles at seabed stage, hoisting blocks suspended from the lifting beams increase the jacket on the primary legs. The jacket is subsequently aligned with the beams, reclined, and skidded additional inboard earlier than transit.
The Jacket raise system will additional improve Pioneering Spirit’s unrivalled versatility and functionality, and supply the offshore vitality market with a complete resolution for heavy raise work.
Pioneering Spirit (previously Pieter Schelte) is the biggest development vessel on the planet. Inspired by the offshore heavy lifting pioneer Pieter Schelte Heerema (1908–81) and designed fully in-house, the vessel is designed for the single-lift set up and removing of huge oil and gasoline platforms and the set up of record-weight pipelines.
Built on the DSME shipyard in South Korea (2011–14), the vessel commenced offshore operations in 2016 with removing of the 13,500 t Yme manufacturing unit offshore Norway.
The vessel redefined heavy lifting with the single-lift removing of Shell’s iconic 24,000 t Brent Delta platform topsides from the North Sea in April 2017 – a world document for an offshore raise.
In June 2018 Pioneering Spirit executed the quickest set up of a big, totally accomplished topside, and heaviest single-lift set up thus far, when it set down Equinor’s 22,000 ton Johan Sverdrup DP topsides on its jacket offshore Norway.
(Source and picture: Allseas – Pioneering Spirit at Tyra discipline offshore Denmark)

The submit ALLSEAS COMPLETES INSTALLATION OF JACKET LIFT SYSTEM ON PIONEERING SPIRIT appeared first on Energy Global News.

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