Hybrid Risers Event: Hybrid Risers Date: January 1995 Author: S. Hatton Ship shaped and semi-submersible floating production systems have been shown to be highly cost effective field development solutions. Flexible risers have been widely adopted on these developments since their flexibility allows large vessel excursions to be accommodated without overstressing. Flexible riser technology is now well established however, costs are relatively high due to the complex pipe manufacturing process and materials used. As water depth increases, flexible riser costs become an increasing proportion of the total development cost. Additionally, flexible pipe may be considered limited with respect to high temperature and pressure capability. This has lead to the development of a number of deepwater riser concepts that utilise all or a majority of rigid pipe. The main objective of these developments has been to reduce the length of flexible pipe required, which is up to 10 times the cost of steel pipe, in order to reduce total riser costs. The hybrid riser is one of these concepts. Whilst a number of hybrid configurations have been developed over recent years only one has been installed. This was by Placid Oil Company in 1988, in the relatively calm waters of the Gulf of Mexico (Green Canyon 29, Water depth 469m). Evaluation of alternate hybrid riser configurations and design approaches clearly shows that cost effectiveness, when compared to flexible risers in the water depth range 400-600m, can only be achieved by careful design optimisation. The following paper discusses an approach to hybrid riser design and presents a design, developed by 2H Offshore Engineering Limited, that is cost effective in water depths as low as 400m and is also suitable for an extreme environment typical of the Atlantic Frontier. If you would like a copy of this technical paper register to download it (pop-up form). Back to All Technical Papers Services Production & Export Riser Concept Engineering Steel Catenary Risers Top Tensioned Risers Hybrid Risers Flexible Pipes & Risers Corrosion Resistance and Composite Risers Subsea Jumper Spools Subsea Umbilicals Deep Sea Mining Integrity, Life Extension & Monitoring | 2H Offshore Riser Integrity & Life Extension Platform Well Integrity & Life Extension Subsea Wellhead System & Life Extension Machine Learning for Riser Engineering Projects Riser System Digital Twin Drilling Riser Management Riser Monitoring System Engineering Riser Inspection, Maintenance & Repair Anomaly & Incident Engineering Subsea Engineering & Assessment Services Component Detailed Design Offshore Decommissioning Engineering Fracture Mechanics and Engineering Critical Assessment Installation Engineering Mechanical Connectors Offshore Renewable Energy Systems and Qualification Testing System Verification & CVA Well Plug & Abandonment Drilling, Completion & Workover Drilling Risers Subsea Completion & Workover Risers Subsea Wellheads & Conductors Offshore Platform Conductors Well Engineering Minimum Facility Platform Design and Engineering Conductor Supported Wellhead Platforms & CoSMOS Monopile Wellhead Platforms Exploration to Early Production Systems Structural Engineering Services Riser Delivery Management & Systems Engineering Get the latest riser insights! Receive our riser news, published papers and blog posts in your inbox monthly. * This iframe contains the logic required to handle Ajax powered Gravity Forms.