VIDEO: Jumbo Offshore installs Karish FPSO mooring at record depth
Jumbo’s scope of work included transport and installation of 14 suction piles (part of a 14-point FPSO mooring system), a tie-in manifold and a 24 inch deepwater gas sales spool.
On behalf of TechnipFMC, Jumbo Offshore successfully completed the first phase of work on Energean’s Karish gas field offshore Israel in October.
Jumbo installed the components at a depth of 1,760 metres, breaking its own deep-water installation record. Jumbo’s work is scheduled to recommence in 2021, with the hook-up and installation of the Energean Power FPSO, the first FPSO ever to operate in the East Mediterranean.
Installing the mooring spread for the Energean Power FPSO, Jumbo installed 13 suction piles of 176 tonnes each and one weighing 235 tone. Both the deck layout and the two 900-tonne cranes of Jumbo’s offshore construction vessel Fairplayer were reconfigured to enable each part of the installation. This involved the Fairplayer’s deep-water winches being modified to allow installation work down to 3,000 metres deep.
Joost van der Wiel, Lead Project Engineer at Jumbo, said that installation of the large suction pile was especially challenging and required a specially engineered method in which the pile was first taken down to a depth of 200 metres, where it was hung off a Dyneema pennant. He said:
“We then recovered the hook, reconfigured the crane, picked up the pile from the pennant and began the second lift down to 1,760 metres deep. That’s a record for us and I am very proud of the team that made this happen!”
The installation of the tie-in manifold and the 24-inch gas sales SSIV closing spool illustrate Jumbo’s position as a full service T&I contractor, continues Jumbo Project Manager Wieteke Looijschelder:
“The gas sales spool is a flexible piece of equipment, so lifting and lowering it called for a dual lift with a complex rigging arrangement. This technical efficiency is a good example of how our DP2 vessels can handle both the transport and installation needs of a project with just one vessel.”
Offshore Construction Manager Barry ten Brinke adds:
“The Karish contract was a multi-disciplinary operation and was a unique challenge for Jumbo. And, just as with all project completions, its success was driven by a great team onboard and ashore.”