Decommissioning and life extension analysis

Analysis for Safe, Efficient Late Life projects

Our in-house riser and conductor analysis supports operators with safe, efficient decommissioning and life extension. We assess structural integrity, fatigue, operational limits, rig suitability, and optimise decommissioning equipment. By collaborating with offshore teams and stakeholders, we deliver practical, technically robust solutions that reduce risk, extend asset life, and enhance overall project efficiency.

Taking the challenge out of ageing assets

Decommissioning and life extension projects can be complex, but the right analysis makes them manageable. Our in-house riser and conductor experts combine technical precision with operational experience to deliver safe, efficient, and practical solutions for mature assets worldwide.

Our offshore-analysis team helps to:

Assess the condition and integrity of risers and conductors, covering fatigue, corrosion, strength, stability, and operational limits
Optimise decommissioning equipment, rig selection, and vertical tension for safer, more efficient operations
Minimise risk, extend asset life, and provide practical, actionable solutions for complex projects

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Decommissioning and Life Extension Analysis Benefits

Strength and Stability Analysis

Evaluates risers and conductors to ensure they can safely withstand operational and environmental loads, maintaining structural integrity and stability during decommissioning or life extension projects.

Corroded conductor integrity assessments

Assesses the condition of ageing or corroded conductors, identifying weaknesses and determining whether repairs, reinforcement, or operational limits are required to maintain safe, reliable performance.

Fatigue analysis (both historic and future life operations)

Examines historical and projected cyclic stresses on risers and conductors to predict fatigue life, supporting safe decommissioning and future operational planning.

Optimisation of decommissioning equipment (historic and future operations)

Identifies the most efficient and the safest equipment configurations, reducing operational risk, downtime, and costs during decommissioning activities.

Assessments to aid rig selection

Evaluates rig suitability for specific decommissioning and late-life operations, considering load capacities, environmental conditions, and operational requirements.

Well loading calculations and vertical tension optimisation

Calculates forces acting on wells, risers, and conductors to optimise vertical tension, ensuring structural integrity and safe, efficient operations.

Minimum allowable conductor wall thickness assessments

Determines the thinnest acceptable conductor wall thickness to maintain safety and performance, guiding maintenance, repair, or replacement decisions.

Conductor repair analysis and optimisation

Provides technical guidance for repairing or reinforcing conductors, balancing safety, operational efficiency, and cost-effectiveness during late-life and decommissioning projects.

Products

Drilling

Proven, flexible and integrated drilling well access solutions, improving efficiency across subsea developments.

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Intervention & abandonment

Riser-based systems for safe and reliable well re-entry, for intervention and abandonment operations.

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Offshore analysis

Intelligent analysis supporting confident delivery, smarter investment and sustained project success.

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Carbon capture & storage

Expert CO₂ storage solutions, supporting tomorrow’s energy transition.

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Subsea

Integrated subsea systems connecting seabed infrastructure through to surface operations.

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Tensioning

Trusted tension capabilities built for ease, longevity and performance.

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Platforms

Innovative offshore platforms tailored to unique project needs, from concept to installation.

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Offshore equipment & services

Delivering a full suite of specialist products, supported by decades of offshore expertise.

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News & blogs

Why UK Mature-Basin Tiebacks Demand More – And What It Takes to Make Them Work

In the first article in this series, I outlined why subsea tiebacks have become the only realistic development route left in the UKCS and why the window to execute them is narrowing fast. But urgency alone doesn’t make a project deliverable. Subsea tiebacks often get described as the quick, low‑CAPEX answer to unlocking remaining reserves, especially in […]

Decommissioning and life extension analysis

Analysis for Safe, Efficient Late Life projects

Taking the challenge out of ageing assets