Subsea

Our subsea portfolio includes flexible designs for Offshore Construction, Well Intervention, Inspection/Maintenance/Repair (IMR), Subsea Umbilicals, Risers and Flowlines (SURF) and rock installation vessels.

Portfolio

References

Vessel designs for subsea operations

Our subsea vessel designs are tailored to meet your specific operational demands by offering large work decks, high operability, and exceptional flexibility for configuring mission equipment.

With the signature ULSTEIN X-BOW®, the X-STERN®, or the TWIN X-STERN®, these vessels prioritize operability, crew safety, and comfort, even in the most challenging weather conditions. Moreover, our designs incorporate energy source flexibility, including MGO, batteries, and alternative fuels, to ensure optimized fuel consumption during transit and sea-keeping operations.

Subsea portfolio

While our portfolio demonstrates our skills, we can adapt our designs to suit your precise requirements.

SX164 ULSTEIN June24 In Air WEB SB Fore Low

Deck area: 800-950sqm

Crane capacity: 100-150t

SX164

Deck area: 1,000-1,400sqm

Crane capacity: 150-250t

SX174

SX121 mk3 Sept16 ULSTEIN Sea SB Fore Low

Deck area: 1,400-1,850sqm

Crane capacity: 250-400t

SX121

Deck area: 2,000-2,500sqm

Crane capacity: 400t

SX232

SX165 ULSTEIN Aug24 WEB In Air SB Fore profil 0 5x

Deck area: 2,050-2,450sqm

Crane capacity: 400t

SX165

Engineering excellence at sea

Our innovative hull designs, including the X-BOW®, X-STERN®, and the TWIN X-STERN®, elevate subsea operations. These cutting-edge designs aren't just technological achievements; they exemplify our comprehensive approach to vessel design. Every aspect is meticulously crafted to work in perfect harmony, delivering unmatched performance, efficiency, and adaptability in the most challenging offshore environments.

Smoother, faster voyages: The ULSTEIN X-BOW® reduces wave resistance, which ensures smoother, faster, and more fuel-efficient journeys. It performs exceptionally well in rough seas, minimizing slamming and vibrations, enhancing fuel efficiency and providing a safer and more comfortable environment for the crew. This design allows for continuous operation even in harsh conditions, keeping subsea projects on track.
Enhanced operational versatility: The ULSTEIN X-STERN® brings a new level of versatility by enabling bidirectional operation. This innovative stern design allows for efficient movement and positioning in both forward and reverse directions. It provides superior station-keeping and manoeuvrability, making it ideal for dynamic and precise subsea operations, which minimize downtime and enhance productivity.
Unmatched manoeuvrability: The TWIN X-STERN® design is ULSTEIN’s latest innovation, combining two X-STERN® units to create a vessel with outstanding operability, control, and flexibility. This unique configuration ensures exceptional maneuverability and precision, which are crucial for complex subsea tasks such as deep-sea exploration, renewable energy projects, and subsea construction. The ULSTEIN TWIN X-STERN® enables operations to be conducted with maximum efficiency and minimal environmental impact, establishing a new standard for subsea vessel design.
Comprehensive efficiency: Our holistic design approach maximizes operational efficiency by considering every aspect of vessel design. From energy efficiency to crew comfort, operational flexibility to environmental sustainability, each element of the X-BOW®, X-STERN®, and TWIN X-STERN® designs enhances the performance of the whole vessel, ensuring optimization for every challenge.

Proven designs - see our subsea references

Decades of building state-of-the-art vessels for demanding marine operations have given us a knowledge base and experience guaranteeing the highest standards of quality, execution and delivery.

Shipbuilding worldwide

In addition to Ulstein's yard in Norway, we work with partner yards worldwide. Contact us if you have a specific yard in mind for your next project and would like us to assist.