Frontier Deepwater Developments – The Impact on Riser Systems Design in Water Depths Greater than 3,000m Event: OTC Date: May 2015 Author: N. Saglar, B. Toleman, R. Thethi The offshore industry anticipates the need for production riser systems in ultra-deepwater fields where water depths are between 3,000m to 4,500m. The development of ultra-deepwater fields leads to many challenges on the selection of the riser concept and in some instances such applications may require extending riser technology beyond its current limits. Consequently, there is a need to understand the feasibility of riser systems in such ultra-deepwater applications and the technology gaps that exist. In ultra-deepwater, long suspended riser lengths will significantly increase the riser weight potentially leading to challenges with offshore installation related to laying vessel capability. High external and internal pressure on the riser will lead to the need for heavy wall pipes. Thick-wall riser pipe will bring about riser design challenges in fabrication of pipes, riser pipe welding, riser hang-off system selection, long-term fatigue design, and fabrication of specialty riser joints. By looking into these challenges, it is very important to select the most appropriate riser concept for the ultra-deepwater fields and understand the current pipe manufacturing limits, enabling technology needed for such systems, and technology gaps considering the critical points mentioned above. This paper addresses the key riser design issues considering wall thickness sizing, top tension, axial dynamics, selection of pipe material, design of key components, and installation issues. This paper evaluates feasibility of a number of production and export riser configurations for ultra-deepwater applications based on existing technology, identifies current technology limits, and determines technology gaps that exist. Methods of advancing the current capability to meet the requirements of frontier deepwater applications are also proposed in the paper. If you would like a copy of this technical paper register to download it (pop-up form). All technical papers Share this page Share on FacebookShare on LinkedinShare on TwitterEmail Services Production & Export Riser Concept Engineering Steel Catenary Risers Top Tensioned Risers Hybrid Risers Flexible Risers Composite Risers Subsea Jumper Spools Subsea Umbilicals Deep Sea Mining Drilling, Completion & Workover Drilling Risers Completion & Workover Risers Subsea Wellheads & Conductors Platform Conductors Well Engineering Minimum Facilities Platforms Conductor Supported Wellhead Platforms & CoSMOS Riser Delivery Management Integrity, Life Extension & Monitoring Riser Monitoring System Engineering Drilling Riser Management Anomaly & Incident Engineering Subsea Wellhead System & Life Extension Platform Well Integrity & Life Extension Inspection, Maintenance & Repair Subsea Engineering Services Component Detailed Design Decommissioning Engineering Engineering Critical Assessment Installation Engineering Mechanical Connectors Offshore Renewable Energy Qualification Testing Verification & CVA Well Plug & Abandonment Get the latest riser insights!Receive our riser news, published papers and blog posts in your inbox monthly.