SubseaPartner AS

SubseaPartner AS is a Norwegian subsea services company that describes itself as a specialist in "shallow deep intervention" — the critical subsea zone immediately surrounding offshore installations. Headquartered at the Stoltenberg base in Haugesund, Norway, the company sits at the heart of the North Sea subsea value chain and operates across offshore, near-shore and inshore locations on both the Norwegian and UK Continental Shelves. Its stated mission is to protect the operability and integrity of floating and fixed offshore installations, even in the harshest environments, through planned or unplanned subsea interventions. The company serves four main asset categories. For FPSOs it provides flexible subsea services covering hull, turret, risers, mooring systems and thrusters, aimed at extending asset life and minimizing costly offshore downtime. For semi-submersibles it delivers cleaning, inspections, subsea maintenance and repairs. For offshore wind it offers subsea operations and maintenance services including inspection, cathodic protection replacement, and cable repair and replacement support. For fixed installations it protects structural integrity through structural inspection, clamp installation and anode replacement. SubseaPartner's service portfolio is built around inspection, maintenance and repair (IMR), construction and decommissioning support. Specific capabilities include cathodic protection measurement and replacement, diver-led propeller blade cleaning, precision riser cutting for safe disconnection during decommissioning or emergencies, underwater magnetic particle inspection (MPI) for weld integrity, and mooring repair and maintenance with emergency response. The company emphasizes certified divers, ROV systems and traceable reporting, and combines intervention methods to deliver optimal solutions with flexibility and cost-efficiency. Positioning itself as an on-demand partner, SubseaPartner brings deep expertise in project management and engineering, agile project teams, fit-for-purpose assets and strategic partnerships to complex subsea challenges. Its project record includes work such as the 2025 Gullfaks C shaft rod repair, the 2025 Goliat fairlead repair Phase II, and a 2026 offshore jacket structure clamp installation. The company is active and continues to market its services to operators seeking to keep offshore operations moving, from rapid emergency response to planned subsea maintenance.

SubseaPartner AS is a Norwegian diving support and subsea services company operating from Haugesund, Norway. Public information about the company's early corporate history is limited; its own materials and Wikidata describe it simply as a Norwegian diving support company. What is well documented is its current operating model and project record. The company has built its identity around the concept of "shallow deep intervention" — the critical subsea zone surrounding offshore installations. From its headquarters at the Stoltenberg base in Haugesund, strategically located at the heart of the North Sea subsea value chain, SubseaPartner serves operators on the Norwegian and UK Continental Shelves across offshore, near-shore and inshore locations. Its service model combines project management and engineering expertise, agile project teams, fit-for-purpose assets and strategic partnerships to address complex subsea challenges. SubseaPartner's service lines have developed around the full operational lifecycle of offshore installations. Its inspection, maintenance and repair (IMR) offering covers cathodic protection measurement and replacement, diver-led propeller blade cleaning, underwater magnetic particle inspection, mooring repair and maintenance, and structural inspection with clamp installation and anode replacement. It also provides construction and decommissioning support, including precision riser cutting that enables safe disconnection during decommissioning or emergencies without requiring shutdown. The company organizes its offering by asset type: FPSOs (hull, turret, risers, mooring systems, thrusters), semi-submersibles (cleaning, inspections, subsea maintenance, repairs), offshore wind (inspection, cathodic protection replacement, cable repair and replacement support), and fixed installations (structural inspection, clamp installation, anode replacement). This asset-based structure reflects the breadth of the North Sea offshore market it serves. Documented projects include the 2025 Gullfaks C shaft rod repair, the 2025 Goliat fairlead repair Phase II, and a 2026 offshore jacket structure clamp installation. These projects illustrate the company's focus on planned and unplanned interventions that extend asset life and minimize costly offshore downtime. SubseaPartner continues to position itself as an on-demand partner for operators, from rapid emergency response to planned subsea maintenance.

• 2025 – Gullfaks C Shaft Rod Repair project

• 2025 – Goliat Fairlead Repair Phase II project

• 2026 – Offshore Jacket Structure – Clamp Installation project

Specialist in "shallow deep intervention" — the critical subsea zone surrounding offshore installations — delivering on-demand, flexible and cost-efficient subsea services from a North Sea hub in Haugesund.

• Cathodic Protection Measurement

  Cathodic protection measurements on offshore assets, verifying anode performance, ensuring compliance, and extending structural life with certified divers, ROV systems, and traceable reporting.

• Cleaning of Propeller Blades

  Diver-led propeller blade cleaning for FPSOs and semi-submersibles, removing fouling to restore efficiency, prevent cavitation damage, and protect propulsion performance without costly drydock.

• Cutting of Risers

  Precision riser cutting for FPSOs, enabling safe disconnection during decommissioning or emergencies without shutdown, using certified divers and specialized hydraulic or mechanical tools.

• Magnetic Particle Inspection (MPI)

  Underwater magnetic particle inspection on offshore steel, detecting cracks to ensure weld integrity, compliance, and asset life extension for FPSOs, semi-submersibles, and floating wind platforms.

• Mooring Repair & Maintenance

  Offshore mooring repair and maintenance, delivering inspection, replacements, and emergency response to ensure stability, safety, and compliance while minimizing downtime and extending asset life for floating units.

• Replacement of Cathodic Protection Systems

  Replacement of offshore cathodic protection systems, installing new anodes and verifying performance.

1. 1SubseaPartner | Shallow Deep Subsea Services for FPSO & Windsubseapartner.no
2. 2SubseaPartner | Shallow Water Subsea Solutions in the North Seasubseapartner.no
3. 3Subsea Services | IMR, Construction & Decommissioningsubseapartner.no
4. 4FPSO Subsea Services | SubseaPartner Inspection & Repairsubseapartner.no
5. 5Subseapartner ASwikidata.org