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4Subsea Awarded DeepStar Project to Develop Guideline for Polyester Mooring Line Monitoring

9[th] January 2026 4Subsea Awarded DeepStar Project to Develop Guideline for Polyester Mooring Line Monitoring 4Subsea has been awarded a project under the DeepStar® consortium to develop a guideline for monitoring of polyester mooring lines used in deepwater floating systems. The project will support the establishment of best practice for integrity monitoring, contributing to safe operations, reduced risk and improved design verification. The guideline will address what to monitor, how to monitor it, and how to interpret monitoring data for polyester mooring lines. The work is

𝐔𝐩𝐝𝐚𝐭𝐢𝐧𝐠 𝐭𝐡𝐞 𝐅𝐥𝐞𝐱𝐢𝐛𝐥𝐞 𝐏𝐢𝐩𝐞 𝐇𝐚𝐧𝐝𝐛𝐨𝐨𝐤 𝐟𝐨𝐫 𝐚 𝐧𝐞𝐰 𝐠𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐨𝐧 𝐨𝐟 𝐨𝐟𝐟𝐬𝐡𝐨𝐫𝐞 𝐨𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧𝐬

Since its first release more than 30 years ago, the Flexible Pipe Handbook has been a cornerstone reference for safe and efficient subsea operations.Now, 4Subsea, SINTEF, Norwegian University of Science and Technology (NTNU), and four leading operators have joined forces to update the handbook - incorporating new knowledge on materials, analysis tools, and integrity management methods developed over the past decade.The new edition will align with the API 17B/J revision (2024) and provide updated guidance on fatigue modelling, corrosion mechanisms, and lifetime extension.The work will

4Subsea Secures Service agreement to monitor steel catenary risers on Bacalhau field in Brazil

4Subsea has been awarded a service agreement to monitor steel catenary risers on the Floating Production Storage and Offloadings (FPSOs) on the Bacalhau field in Brazil.The service is delivered using 4insight® Subsea Asset Integrity which combines advanced strain and motion sensors to measure vessel motions and riser load with algorithms to calculate pressure and hoop stress, accumulated riser fatigue damage and damage rate to monitor the integrity and risks to steel catenary risers on the FPSO. The digital service is delivered as monitoring dashboards and data fed into Equinor’s data

4Subsea Secures Three-Year Service Agreement to Monitor Vår Energi's West Phoenix Rig

4Subsea has been awarded a three-year service agreement with Vår Energi to monitor and analyse wellhead integrity to ensure safe operations for the Balder Future drilling and completion operations.  The SWIM™ service employs retrofittable subsea sensors to measure movement and strain on the wellhead. It applies advanced algorithms and machine learning combined with deep domain expertise to monitor fatigue damage accumulation, well support and structural integrity.The service creates a digital twin of the well and riser systems combined with boundary conditions and updated with sensor data.

4Subsea Installs IoT Sensors on Floating Turbine Zefyros to Prove Cost Reduction Potential with Digital Twin

April 28th 2020 - 4Subsea has installed advanced, retrofit sensors on floating turbine Zefyros (previously Hywind Demo) to prove cost reduction potential with a Digital Twin. A few hours after mobilisation on April 20th, the autonomous sensors started streaming motion and load data to 4insight.io  from Unitech’s wind turbine off the west coast of Norway. The project aims to prove significant cost reduction potential in offshore wind by using a Digital Twin of the substructure to measure actual loads and fatigue on the turbine.4Subsea has

4Subsea acquired by Subsea 7

4Subsea today announced that it has been acquired by Subsea 7 in a 100% stock buyout. The acquisition will enable further enhancement and scaling of 4Subsea’s know-how, technology and services to a worldwide market.Asker, Norway - October 3rd 2019: 4Subsea, a leading provider of technology and services to oil & gas and offshore wind operators worldwide, reports the acquisition of their company to Subsea 7. 4Subsea will function autonomously within Subsea 7, maintaining an independent brand and management team. 4Subsea’s Peter Jenkins will continue in his role as CEO of the company.

4Subsea Acquires Astori

4Subsea today announced the acquisition of Astori AS, a Norwegian provider of subsea control systems for well intervention operations. Their automation and control technology ties into 4Subsea’s portfolio of critical decision support solutions for operators.Asker, Norway - March 19th 2019: 4Subsea, a leading provider of technology and services to oil & gas and offshore wind operators worldwide, reports the acquisition of Astori AS. Astori delivers unique subsea control systems for simplified XT installations that can operate all types of XTs from all main vendors, simplifying and reducing

4Subsea and Ashtead Technology Enter Strategic Partnership

The two companies today sealed a partnership for global distribution of sensor technology to the oil and gas industry. By combining sensor engineering competence, domain expertise and technologies for effectively ensuring the lifespan of subsea assets, the partnership will support operators and vessel owners in reducing risk and operational cost.Aberdeen and Asker, January 23rd 2019 – Under the deal, 4Subsea’s autonomous, retrofittable sensors will be available to the global oil and gas industry via Ashtead Technology. Additionally, 4Subsea will explore utilising Ashtead’s acoustic sensors

4Subsea Delivers New Report on Bonded Flexible Pipes

4Subsea has recently completed a report on bonded flexible pipes for PSA Norway (Petroleum Safety Authority). The 75-page report provides an in-depth update on bonded flexible pipes and covers most bonded flexible pipes and hose types used in the oil and gas industry today.According to PSA, incidents in recent years linked to flexible pipes/hoses on the Norwegian Continental Shelf demonstrated a need for state-of-the-art knowledge about bonded flexible pipes and hoses. In its review, 4Subsea concentrated on design, planning, operation, inspection and maintenance and how to ensure there

4Subsea Awarded Master Service Agreement for Well Monitoring and Data Processing with Equinor

4Subsea has been awarded a 3-year Master Service Agreement for processing of BOP measurement data for a selection of Equinor’s mobile drilling units operating on subsea wells.Asker, August 22nd 2018 – The purpose of the contract with Equinor is to provide well monitoring services and rental of sensors to support Equinor’s need for collecting, processing, and documenting BOP measurement data for improved operational decision support. “Equinor is in the forefront of the industry in the way they are applying data and digital services to reduce operational risk and cost during drilling

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