Subsea Completion & Workover Risers 200+ projects conducted 2H Offshore has extensive experience in completion, intervention and workover risers, landing strings and riserless intervention systems. These projects encompass a wide range of services, vessel types, water depths and environments including many of the most technologically challenging deepwater and HPHT (high pressure and high temperature) wells. Riser arrangements and methods of implementation can vary considerably from one application to the next, with each presenting specific design challenges. We have worked extensively with the key interfaces and components of completion and workover riser systems, including tension lift frame, drill string compensator, surface tree, coiled tubing equipment, LRP, EDP and subsea tree. Our experience of the riser operations and equipment enables us to quickly define operating limits for existing equipment or develop new systems including joint configuration, component sizing, coupling selection and clamp design. Key Services Riser configuration and space-out Wall thickness sizing and coupling selection Production-annulus-umbilical interaction and clamp/guide design Taper joint sizing and detailed design Stack-up and tension optimisation Strength and operating envelope analysis to API RP 17G and ISO 13628-7 Riser weak point, vessel drift-off and loss of position assessment Drill string compensator and tensioner lock-up and failure assessment Tree installation and intervention analysis and operating envelopes Riser disconnect, recoil and hang-off analysis Wave fatigue and VIV fatigue analysis Marine riser mode equipment passage limitations assessment BOP landing string shearing capacity assessment Component engineering (connector, cased wear joint) Coupling qualification testing Spider, test and make-up tooling specification and design Specialist component procurement management Riser monitoring and integrity management Operating manuals Project Experience BP – Q5000, DS-3 and other intervention riser design campaigns Woodside – Management of riser data and operability assessments of 6 different intervention risers Total – Akpo Detail design of drill pipe riser and supply of taper joints BP – Schiehallion 7×2 5k and monobore completion riser design and analysis Cameron (UK) – over 20 projects on the 5×2 10k system Coflexip – Stena Seawell 6-5/8in intervention riser, North Sea DSND – Botnica and Fenica intervention risers, North Sea engineering support GE/SRP – HPHT (15-20 ksi, 250-350 degF) riser system design Helix – over 20 studies for risers deployed from the Q4000, H534 and Q5000 vessels OneSubsea – HPHT (15-20 ksi, 250-350 degF) riser system design study Petrobras / Grant Prideco – Deepwater Brazil optimisation study Shell – GoM multiple intervention riser and riserless campaigns TOGI – 5k tool joint completion riser design Total/Schlumberger – multiple studies for landing string analysis in marine riser mode Share this page Share on FacebookShare on LinkedinShare on Twitter Services Deepwater Production Systems Riser Concept Engineering Steel Catenary Risers Top Tensioned Risers Hybrid Risers Flexible Pipes & Risers Composite Risers Subsea Flowlines & Jumpers Subsea Umbilicals System Verification & CVA 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 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 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 Offshore Renewables & Alternative Resources Fixed Offshore Wind Floating Offshore Wind Deep Sea Mining Related TECHNICAL PAPER Standardizing Completion & Workover Riser Assessments See all Technical Papers TECHNICAL PAPER Structural Response Monitoring of Huntington HP Drilling and Completion Riser See all Technical Papers