Subsea Wellhead System Life Extension Life extension of subsea wells is proving to be a cost effective method of maximising production in fields that are aging and possibly approaching the end of their design life. 2H can provide detailed assessments of a subsea well’s current condition and potential future use to determine if life extension is possible. Our assessments consider the asset’s operational history since installation and detail its residual strength and fatigue capacity to help decision making regarding re-entry. To achieve this, we work closely with our clients to gather as much data as possible on the well’s operational history, including as-built design records and surveys detailing any degradation. We then define and deliver a scope of work that is appropriate to the specific well. The outcomes of the assessment are used to define guidance and recommendations for the planned operations, which may include the use of structural monitoring or in extreme cases, wellhead load relief systems. Key Services Analysis of previously accumulated fatigue damage Calculation of fatigue damage from future drilling and completion operations selection of a suitable drilling vessel and riser system Definition of optimum operating criteria to minimise further fatigue damage Monitoring system design and implementation Wellhead system model calibration and fatigue re-estimation Evaluation and recommendation of mitigation measures to reduce wellhead system loads Project Experience Offshore Ireland – Workover operations on 30” conductor wells North Sea – Sidetrack drilling on tieback wells UK continental shelf – Re-drilling of template wells Offshore West of Shetland – Conversion of appraisal wells to production wells Offshore Australia – Shallow water drilling with 5th generation vessels on the NWS Share this page Share on FacebookShare on LinkedinShare on Twitter Services Deepwater Production Systems Riser Concept Engineering Steel Lazy Wave & Catenary Risers Top Tensioned Risers Hybrid Risers Flexible Risers, Flowlines & Umbilicals Composite Risers Subsea Flowlines & Jumpers Subsea Umbilicals System Verification & CVA Integrity, Life Extension & Monitoring Riser Integrity & Life Extension Subsea Wellhead System & Life Extension Machine Learning for Riser Engineering Riser System Digital Twin Riser Monitoring System Engineering Riser Inspection, Maintenance & Repair Subsea Incident Engineering Fracture Mechanics and ECA Offshore Renewables & Alternative Resources Decarbonisation Fixed Offshore Wind Floating Offshore Wind HV Cable Engineering Moorings & Anchors Deep Sea Mining Drilling, Completion & Workover Drilling Risers Drilling Riser Management Subsea Completion & Workover Risers Subsea Wellheads & Conductors Offshore Platform Conductors Platform Well Integrity & Life Extension Well Engineering Well Plug & Abandonment Minimum Facility Platforms Conductor Supported Wellhead Platforms & CoSMOS Monopile Wellhead Platforms Exploration to Early Production Systems Structural Engineering Services Installation Engineering Decommissioning Engineering Riser Delivery Management Component Detailed Design Mechanical Connectors Systems & Qualification Testing Related TECHNICAL PAPER Detailed Approach for the Assessment of Accumulated Wellhead Fatigue See all Technical Papers TECHNICAL PAPER Subsea Well Life Extension Fatigue Challenges See all Technical Papers