Allseas will deliver major new deepwater crude oil and natural gas export systems for Enbridge Offshore Facilities in the central Gulf of America. This will expand transport capacity and strengthen critical subsea infrastructure for future energy production.
For more than three decades, Allseas has supported the region’s operators. This latest contract reinforces the company’s position as a partner for complex deepwater projects and highlights its continued role in advancing strategic energy developments across the Gulf. So far, Allseas has more than 8000 kilometres of subsea pipeline in the area.
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Strategic deepwater infrastructure
Awarded by midstream operator Enbridge, the project covers the transport and installation of four export pipelines, totalling more than 515 kilometres, to transport oil and gas from upcoming deepwater developments to existing offshore hubs for onward delivery to market.
The awarded scope includes:
- 321 kilometres of 24-inch and 26-inch oil pipeline originating in the deepwater Keathley Canyon area of the Gulf of America to the Green Canyon 19 (GC19) platform.
- 195 kilometres of 12-inch gas pipeline originating in the deepwater Keathley Canyon area of the Gulf of America connecting to Enbridge’s Magnolia Gas Gathering System (feeding its Garden Banks network).
Each pipeline will incorporate a 3-kilometre steel catenary riser (SCR) linking to floating production units. Installed in water depths up to 2000 metres, the systems will feature multiple crossings, inline structures and termination assemblies to accommodate future tie-ins from nearby discoveries.
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Rome and Sparta Pipeline
The oil export system will connect to the Rome Pipeline – onboard the GC19 platform – scheduled for installation by Allseas in 2028, while the gas gathering system will deliver into the Magnolia Gas Gathering System via the new Sparta Gas Pipeline owned by Enbridge’s joint venture with Shell Pipeline Company LP, which Allseas will install in 2026.
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Modified double-joint factory
Allseas’ dynamically positioned pipelay vessel Solitaire will perform the offshore campaign between 2027 and 2028. The vessel will utilise its modified double-joint factory (DJF) – a key component of Allseas’ fast S-lay production capability – featuring fully automated welding and inspection systems to achieve precise, consistent and efficient pipelay in deepwater conditions.
Building on Allseas’ innovation in automation and digitalisation, the enhanced DJF integrates advanced pipe handling, tracking, welding and inspection processes to optimise production flow and ensure the highest weld quality standards.
Picture: The pipelay vessel Solitaire (photo by Allseas).
