The giant “Pioneering Spirit” presents a new jacket lifting system

The world’s largest catamaran, Pioneering Spirit, has used its new jacket lift system for the first time with the removal of the 8,100 metric ton Ninian Northern jacket in the North Sea off the Shetland Islands.

Allseas’ Pioneering Spirit is the largest offshore construction vessel ever built, designed for the single-lift installation and removal of large oil and gas platforms weighing up to 48,000 metric tons. The vessel entered service in 2016 and has already set a number of lifting records at sea, including the heaviest single lift world record with the retirement of the 24,000 metric ton Brent Delta platform in 2017 .

The vessel is now fitted with a revolutionary new Jacket Lifting System (JLS), mounted at the stern of the vessel, which comprises two 170 meter long connected beams that lift and support the jackets during removal and dismantling operations. installation, as well as transport jackets in a nearly vertical position to maintain the integrity of massive structures. Allseas says the system makes it “fundamentally different” from conventional crane-lift vessels and also the vessel’s own lifting system.

The new system allows direct transfer of structures, eliminating the need for support barges. There is also no need to tie the jacket to the beams during transport “due to the vessel’s high level of stability, which significantly reduces time spent on the ground and reduces carbon footprint”, according to Allseas.

Photo courtesy Allseas

Pioneering Spirit began with the single lift removal of the 14,200 metric ton Ninian North Platform tops in 2020. Returning to the Ninian field earlier this month, the vessel lifted the jacket at eight legs out of the water and lowered her to the deck for transit.

The jacket will be delivered to the Veolia-Peterson yard in Dales Voe, Shetlands, which is aiming for 98% steel reuse.

The success of the operation puts an end to two years of planning and design.

Photo courtesy Allseas

“CNR International’s decision to select Pioneering Spirit for the removal of the Ninian Northern liner demonstrates the industry’s confidence in Allseas’ innovative engineering solutions and further reinforces our reputation as a leader in the global energy market. offshore,” said Allseas Chairman Edward Heerema.

“With the successful retirement of the Ninian Northern Jacket, Allseas has achieved its long-term vision of a vessel that provides the offshore industry with a total solution for offshore work,” Heerema added.

Ninian Northern is the first of several major jacket removal and installation engagements for Pioneering Spirit in 2022. The vessel is booked to lift and transport over 123,000 metric tons of structures for the offshore energy industry this year using both his jacket lift and motion compensation. Topside lifting systems.

More information about Pioneering Spirit’s Jacket Lift System and Operation Ninian Northern can be found in the videos below: