Allseas

Allseas is a contractor in the offshore energy market.

More Info on Allseas

Allseas offers expertise in the design and execution of large and complex offshore projects. Designed and optimized in-house, its fleet of vessels operate worldwide. Allseas specializes in four core activities: offshore pipeline installation, heavy lift, deep-ocean polymetallic nodule collection and river waste collection.

Information accurate as of June 2024. 

Articles

Courtesy Allseas
The Pioneering Spirit carries out pipelay activity on the GTA South Line.
Fast-track modification enables vessel to switch from S-lay to J-lay mode.
Aug. 8, 2024
Courtesy Allseas
Brent Charlie has arrived at its final resting place following a transfer and load-in operation at Able UK’s Seaton Port in Hartlepool, northeast England.
Allseas has delivered Shell’s decommissioned Brent Charlie topsides to Able UK’s Seaton Port in Hartlepool, northeast England for dismantling and recycling.
Aug. 2, 2024
Courtesy Allseas
The Lorelay vessel was designed for the execution of small and medium diameter pipeline projects of any length in unlimited water depths, the company said.
Allseas’ Lorelay will sail to the Caribbean Sea during the fall to install a pipeline off the east coast of Trinidad in 60 m to 70 m water depth.
June 29, 2024
Courtesy Allseas
Pioneering Spirit has completed her first assignment of the 2024 lift season with the installation of the offshore substation for the Eoliennes en Mer Iles d’Yeu et de Noirmoutier wind farm project offshore France.
The Pioneering Spirit set down a substation for an offshore France wind project, while the Lorelay pipelay vessel heads to the Caribbean for pipelay work.
June 21, 2024
Courtesy Allseas LinkedIn
Last week the Audacia team completed the 262-km Barossa gas export pipeline in the southern Timor Sea.
Allseas’ Audacia team has completed the 262-km Barossa gas export pipeline for Santos in the southern Timor Sea.
June 11, 2024
Courtesy Allseas
statpipe_landfall_pullin
Allseas’ Pioneering Spirit, supported by the Oceanic vessel, has completed its first offshore pipeline pull-ins.
April 30, 2024
Courtesy Allseas
audacia
Allseas’ pipelay vessel Audacia has installed its largest pipeline end termination in S-mode for Santos’ Barossa gas-condensate development offshore Australia.
April 17, 2024
Courtesy Allseas
A flat-bottom anchor barge, Allseas’ Sandpiper has been newly converted for shallow-water construction activity.
Automated welding, anchor placement support productivity
April 12, 2024
Courtesy Allseas
allseas_pipelay
Two months after reaching the field, the vessel’s production team welded, scanned and field joint coated the final piece of pipe for the second 16-inch gas export pipeline.
Feb. 21, 2024
Courtesy Allseas
Sandpiper is a flat-bottom, anchored barge for shallow-water offshore construction activities, purchased by Allseas in 2022 and upgraded for pipelaying in 2022/23.
Allseas’ new shallow-water offshore construction barge has undergone an inauguration ceremony in Singapore.
Oct. 30, 2023

News

Courtesy Allseas
Pioneering Spirit completes single-lift removal of Heather Alpha topsides
The platform decommissioning and recycling project involved three years of preparation, including structural modifications and offshore work, culminating in a 14-second lift.
Aug. 15, 2025
Courtesy Allseas
Boskalis, Allseas awarded offshore Taiwan gas pipeline T&I job
The companies will design and install a 232-km, 36-inch pipeline across the Taiwan Strait.
July 30, 2025
Courtesy Allseas
Pioneering Spirit delivers first topsides offshore Canada
From heavy-lift operations to pipelaying, Allseas' Pioneering Spirit, Lorelay and Solitaire vessels have been busy working on offshore Canada and North Sea projects.
July 24, 2025
Courtesy Lankhorst
Lankhorst High-Capacity Slings for Allseas Jacket Lifting System
Lankhorst Ropes has provided high-capacity, heavy-lift slings to Allseas’ Pioneering Spirit vessel for the recent transport and lowering of a 7,300-mt jacket for a converter platform...
July 3, 2025
Courtesy Aker BP
Solitaire vessel completes pipelaying work in the North Sea.
The Pioneering Spirit vessel completed heavy-lift removals for the Valhall project, and the Solitaire vessel finished pipelaying work for the Yggdrasil development.
July 2, 2025
Courtesy Allseas
Allseas' Pioneering Spirit construction vessel sailing offshore.
Allseas’ Pioneering Spirit has completed the transport and installation of the BorWin epsilon offshore converter platform in the German North Sea.
June 9, 2025
Courtesy Allseas
Allseas has launched a five-year plan to design, develop and deploy a small modular reactor tailored for integration into offshore vessels and for onshore use.
Allseas has started a five-year project to design, develop and deploy a small modular reactor that would be tailored for integration into offshore vessels, in addition to onshore...
June 6, 2025
Courtesy Allseas
Allseas newbuild offshore construction vessels
Allseas is building three new vessels for its fleet, and its taken Lorelay offline while installing a CCS pipeline offshore The Netherlands.
May 14, 2025
Courtesy Allseas
Oceanic kicked off offshore works for the Porthos project
Allseas' Oceanic vessel kicked off offshore works for the Porthos project, and the Sandpiper vessel has completed Santos' Darwin Pipeline Duplication work scope.
March 28, 2025
Courtesy Allseas
Allseas returning to Brazil for deepwater Búzios-10 construction project
Pipelay vessel Audacia will lay 111 km of rigid risers and flowlines.
March 12, 2025

Additional content from Allseas

Courtesy Allseas
Lorelay vessel returns to the Caribbean
Allseas’ Lorelay vessel has completed a 10-day platform-to-platform pipeline installation offshore southeastern Trinidad.
Jan. 29, 2025
Courtesy Allseas
Production on board the Solitaire vessel
Allseas has finished all work on the 700-km, 36-inch Southeast Gateway pipeline project offshore southeast Mexico for TC Energy.
Jan. 18, 2025
Courtesy Allseas LinkedIn
Offshore Australia decommissioning job
Esso Australia has commissioned Allseas to remove up to 12 decommissioned platforms from the Gippsland Basin in the Bass Strait offshore southeast Australia.
Dec. 20, 2024
Courtesy Allseas
Allseas installs pipeline for N05-A gas development in Dutch North Sea
Allseas has completed installation of ONE-Dyas’ N05-A gas pipeline system in the Dutch North Sea.
Nov. 25, 2024
Courtesy Allseas
The Tog Mor flat-bottom, anchored barge was designed for shallow-water offshore construction activities.
Allseas has sold its Tog Mor shallow-water pipelay barge for repurposing after the vessel ran aground in Mexico in September while seeking shelter from a storm.
Nov. 22, 2024
Courtesy Allseas
Allseas says Lorelay is a versatile vessel optimized for the execution of small and medium diameter pipeline projects of any length in unlimited water depths, and for associated work such as the installation of risers and subsea protection frames.
Allseas will lay the subsea pipeline for the Porthos CCS project in the Port of Rotterdam.
Oct. 25, 2023
Courtesy Allseas
Pioneering Spirit And Oceanic
bp has contracted Allseas to complete subsea pipelaying for the Greater Tortue Ahmeyim (GTA) gas development offshore Mauritania and Senegal.
Oct. 13, 2023
Courtesy Allseas
Allseas’ Pioneering Spirit removed the DP3 and DP4 platform installations at the Morecambe Bay development in the East Irish Sea.
Spirit Energy is experiencing its busiest year to date in decommissioning with offshore campaigns across the Central North Sea, South North Sea and East Irish Sea.
Aug. 3, 2023
Courtesy Allseas
Pioneering Spirit
DEME Offshore has booked Allseas’ Pioneering Spirit vessel to install the substation jacket and topside in the first half of 2024.
April 26, 2023
Courtesy Allseas
Allseas Solitaire
Allseas will manage the installation scope for Phase 1 of the Tamar gas field expansion project offshore Israel, operated by Chevron.
Feb. 10, 2023
Courtesy Allseas
Allseas' first vessel, Lorelay, will execute the pipeline installation and burial scope for the N05A gas field development, 36 years after Lorelay's North Sea debut.
Allseas’ Lorelay will perform installation and burial of the new pipeline for ONE-Dyas’ N05-A gas field development in the Dutch North Sea.
Jan. 20, 2023
Courtesy Allseas
Allseas Hvdc Farm
Allseas has secured additional transport and installation (T&I) work for the offshore wind industry, providing services for Vattenfall’s Norfolk Boreas project off the coast of...
Jan. 12, 2023
Courtesy Allseas
Hugn A Tidligere Noa Pd Q I Yggdrasil
Allseas has been selected to provide offshore transport/installation services for a new processing platform topsides facility with well bay area and living quarters in the NOAKA...
Dec. 20, 2022
Courtesy Allseas
Polymetallic nodules produced onboard the Allseas production vessel Hidden Gem.
Hidden Gem vessel gathers metals in waters down to 4 km.
Oct. 24, 2022
Courtesy Allseas
Edward Heerema and son Pieter Heerema attended the Allseas special ceremony in Rotterdam.
Eldest son Pieter will assume the role of president of the Allseas Group.
Sept. 19, 2022
Courtesy Allseas
The Pioneering Spirit removes the Ninian Northern jacket with its new Jacket lift system.
New system removes CNR International’s Ninian Northern jacket.
April 22, 2022