Day 1 - Flexible Risers
Day 1 - Flexible Risers
- Flexible pipe vs. rigid pipe
- Flexible riser concept selection
- Best practice, codes & standards
- Hossam Ragheb - Senior Riser & Advanced Analysis Engineer, Intecsea
- Status on track record and capabilities for flexible pipe solutions in UDW
- Developments on key design drivers and new solutions to achieve new UDW frontiers
- Guillaume Pringuay - Senior Manager Flexibles Technology, TechnipFMC
The objective of this study is to investigate the optimal riser configuration through a comparison of two different riser design automation frameworks based on multi-objective optimizations using a Random Forest (RF) based metamodel coupled with Evolutionary Algorithm (RF-EA) and Radial Basis Function (RBF) based metamodel coupled with Evolutionary Algorithm (RBF-EA). The hybrid framework demonstrates the multi-objective optimization for minimizing material cost and minimizing fatigue life along the riser. Lazy wave configuration is considered for the flexible riser design optimization. The configuration consists of multiple design variables such as top angle, sag bend elevation, hog bend elevation, length of the buoyancy section, the module diameter and the layback distance. The riser configuration optimization is time-consuming and exhaustive due to nonlinear time domain analysis and due to a large number of load cases for extreme load and fatigue load analysis. Metamodel for the riser is the alternative option to use in the optimization algorithm instead of Final Element (FE) model for the dynamic analysis of the riser. Two different machine learning approaches, i.e. RF and RBF are used to develop the metamodels and coupled with Evolutionary Algorithm (EA) to form hybrid optimization method. Minimizing both the riser cost and cumulative fatigue damage of the flexible riser, both the framework presents the optimal solutions characterizing how design changes impact the trade-off between these two competing objectives. RF-EA provides a comparatively better configuration compared with RBF-EA. The riser design automation strategy can save considerable computational time and require less design experience.
- Subrata Bhowmik - Senior Data Scientist - Subsea Digitalisation & Innovation, McDermott International
- Review of the advantages and disadvantages of composites
- Where can the costs saving be made when using composites rather than steel?
- Enabling technology for new concepts and challenging operating environments
TechnipFMC is developing in collaboration with Magma a new generation of Hybrid Flexible Pipe (HFP), based on composite material technology combining Thermoplastic Composite Pipe (TCP) and conventional flexible layers, aiming at addressing the demanding technical requirements of new UDW developments such as pre-salt fields, as well as offering a cost-effective alternative not only to traditional flexible pipes but also to rigid pipeline solutions.
This paper will aim at presenting the HFP design concept and its benefits, the on-going qualification program according to DNV-GL standards as well as the first results obtained to date.
- Laurent Decoret - Chief Product Developer, Composite, TechnipFMC
- Dag McGeorge - Senior Principal Engineer, Riser Technology, DNV GL
- Update on the latest active heating technologies and methods for flexible pipe systems
- Consideration of installation options
- Innovations in installation vessels
- Installation analysis