Oil and gas
Subsea facilities

Achieving the potential of the subsea sector

Backed by a global team of oil and gas experts, we work together with operators, suppliers, governments and industry associates as an independent service provider.

Subsea assets

Contact us:

Kristin Nergaard Berg

Kristin Nergaard Berg

Head of Section Subsea Technology

Subsea developments are often the preferred solution for developing oil and gas fields in deep waters, for marginal fields, and for long step-out distances.  

Subsea technologies are competitive in terms of cost and carbon footprint, but are under constant pressure to stay cost-efficient and to prove robustness and reliability.  

The challenges of managing a global supply chain have made standardization a key theme in recent years. A key challenge for the future is to leverage new technologies for cost-efficient development and operation, while maintaining or improving safety and production availability. 

DNV GL’s history in subsea technology goes back to the early 1970s, and is evidenced by completed projects, significant research, published standards, and recommended practices. By working with key suppliers and operators worldwide we have gained a unique cross-industry understanding of the complexities of subsea tie-backs, specific systems, equipment and components, degradation mechanisms, and integrity. DNV GL has run several joint industry projects (JIP’s) to address subsea challenges.  

Globally, our experts support customers with drilling and well, subsea production systems, subsea power and processing systems, umbilicals, cables and risers.  

By combining this experience with our deep expertise in flow assurance and materials, we help asset owners and suppliers address challenges in design and operation. These can include: 

  • Barrier philosophy and integrity 
  • Design analysis and verification
  • Functional assessment 
  • Pressure containment and structural strength 
  • Material selection and compatibility 
  • Operational loads and fatigue 
  • Structural reliability analysis for remaining fatigue life 
  • System architecture, reliability and operational safety 
  • Lifting, marine operations, and intervention.
DNV GL can assist with:  

Concept and feasibility  

  • Concept selection and FEED to ensure robust decisions – with due consideration of technical solutions, cost and schedule 
  • Establishing standards and technical requirements 
  • General engineering support, decision gate review, and application processes 
  • Risk assessment, management, and mitigation. 

Design construction, installation and commissioning  

  • Design verification and interpretation of technical industry standards
  • Technology Qualification and TRL assessment 
  • Technical expert advice 
  • In-depth knowledge of safety and reliability requirements and performance  
  • State of art solutions for environmental management and performance  
  • Supply chain and fabrication follow-up at manufacturing sites and yards globally.  

Operations, life extension and decommissioning  

  • Ready For Operations (RFO) support  
  • Integrity management, inspection planning and follow-up 
  • Life extension assessments 
  • Failure investigations  
  • Decommissioning studies and verification 
  • Plugging and abandonment.

Contact us:

Kristin Nergaard Berg

Kristin Nergaard Berg

Head of Section Subsea Technology

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Related joint industry project (JIPs)

Safety 4.0

The primary objective of this project is to develop a framework for standardized demonstration of safety for novel subsea technologies, applicable to and tested on a number of industry-relevant use cases.

Smarter well design by sharing data

The objective of this JIP is to get operators, service companies and authorities to share the amount of data available and then prepare the data for further analysis.

Subsea processing JIP - Standardization of subsea pumping

As a result of this JIP, a new DNV GL recommended practice (RP) has now been published. This RP provides a comprehensive specification for subsea pumping systems and complements existing industry standards.

Find more JIPs led by DNV GL here

Related training courses

Hydrogen Induced Stress Cracking (HISC) design and material consideration course (1 day)

This course is based on DNVGL-RP-F112 'Design of Duplex Stainless Steel Subsea Equipment Exposed to Cathodic Protection'

Riser and umbilicals analysis course (2 days)

This course is a good foundation in riser and umbilical analysis with special attention to global analysis.

Riser and umbilicals - technology overview course (1 day)

This course is a good foundation in riser and umbilical design.

Subsea production systems course (3 days)

This introductory course will let the participants familiarise themselves with the building blocks that form a subsea production system

XT design (3 days)

This course will give the participants a ‘jump start’ in XT technology.