Same Subsea System, Two Operations: Offshore Reconfiguration in Less Than a Day

Brief Outline:

• Same MODFOX system used for two different offshore operations with two different SPS suppliers and needs.
• Rapid offshore reconfiguration from M1 to M2 without returning equipment to land.
• Seamless transition between operations for Vår Energi and Equinor.
• Rig time optimized by reconfiguring system during transit from Goliat to Visund.

Location: Goliat and Visund Nord, Norwegian Continental Shelf (NCS)

Challenge:

While operating at Goliat for Vår Energi with a MODFOX M1 system onboard the Transocean Enabler, Equinor prepared to take over the rig for operations at Visund Nord. Equinor required greater fluid capacity for their upcoming operation, making the standard M1 setup insufficient. Finding a way to adapt quickly without demobilizing equipment was critical to avoid project delays.

Solution:

FOX Subsea identified that the existing M1 system could be reconfigured to a MODFOX M2 setup, fulfilling the fluid capacity requirement. The reconfiguration was carried out offshore during the rig’s transit from Goliat to Visund Nord. FOX Subsea mobilized a SUP unit and service personnel, and the system was successfully modified and ready for testing onboard within 24 hours, ensuring full readiness for Equinor’s operation without interrupting the rig schedule.

Result:

The offshore reconfiguration enabled a seamless handover between Vår Energi and Equinor without delays or costly mobilizations. By flexibly adapting the same system to new operational needs, both operators benefitted from minimized downtime, maximized rig utilization, and optimized operational efficiency.

Case Highlights:

• Offshore reconfiguration from M1 to M2 was completed within 24 hours.
• Avoided demobilization and saved significant rig time.
• Supported both Vår Energi and Equinor operations with the same system.
• Enabled flexible adaptation to changing operational needs directly offshore.

FOX Subsea showed impressive flexibility by reconfiguring the system offshore in less than 24 hours. This ensured we were fully ready at Visund without impacting the rig schedule.

Kim Ivar Leirvåg, Equinor

The seamless transition from our operation to Equinor’s was remarkable. FOX Subsea adapted quickly and kept rig time optimized, delivering real value for both operators.

Pål Bilstad, Vår Energi