Magma IDP system briefing
At the Hotel Sorella in Houston, Magma Global and RiserTec presented the results of three months of independent analysis research into Magma’s Integrated Deployment Package (IDP) and m-pipe® downline.
The Magma IDP system is designed for hydraulic pumping and light well intervention in the deep waters of the Gulf of Mexico.
The Magma IDP combines a vessel back-deck system with 3,000m (10,000ft) of 3in 15ksi m-pipe®, Magma’s high flow rate, corrosion resistant, long-life carbon fibre subsea riser pipe.
The briefing included an introductory presentation from Magma’s Commercial Director on the background to the IDP system, and an overview of its operational, cost and risk benefits for light well intervention and commercial comparable rental day-rates to a dual open water coiled tube system.
The hour long presentation was viewed by 30 senior project and operations managers from operators and contractors including BP, Chevron, BOA, ENI, Oceaneering, FMC, FTO, GE, Cross Group, 2H, Subsea7, Aker and Transocean.
The evening finished off with an overview of m-pipe® DNV qualification of the 3in 15ksdi downline, and then a networking session to discuss IDP system capabilities and latest trends in light well intervention in the GoM.
IDP and m-pipe® intervention report
The report was undertaken by RiserTec, an independent design and analysis consultancy based in Houston and Aberdeen, specialising in riser system analysis. The report covered key elements in assessing the suitability of Magma’s IDP system and m-pipe® for operation from the back deck of small vessels for 2,000m (6,500ft) light well intervention in the Gulf of Mexico.
The brief agreed with RiserTec for their review was to:
- Undertake independent 3rd party validation of Magma IDP system global design and analysis
- Optimise m-pipe® riser configurations and review operational envelopes within the Gulf of Mexico
- Establish efficient design and analysis procedures for future client specific implementations and vessels
Research study scope
- Review and verification of existing Magma global analysis models
- Specific review of 2,000m Gulf of Mexico deployment conditions
- Design optimisation for catenary and steep-wave riser configurations
- Operational envelope definition and establishing all key drivers
- Moonpool clashing / bellmouth sizing / buoyancy sizing / load limits
- Installation analysis / procedures and drift-off / drive-off analysis
- Comparison with representative coiled tube system deployment
John Shanks, CEO of RiserTec, covered their extensive research that involved analysis of over 40,000 vessel moonpool deployment and riser shape options for the Magma IDP and m-pipe® riser sections.
The RiserTec 54 page full report was also issued at the event, including research on comparisons of the operability of the IDP system and 3in 15ksi m-pipe® to 2 3/8 in 10ksi coiled tube units used currently in the Gulf of Mexico (GoM).
m-pipe® catenary and steep-wave configurations were considered and both found to perform well in operation.
Whilst either configuration could be adopted depending on project specific considerations, analysis of 25,000 alternative steep-wave configurations showed the steep-wave arrangement was preferred on account of a more straightforward vertical connection to the intervention skid, and emergency disconnection from the skid.
22,000 load cases were assessed for the selected configuration, combining ranges of current velocity, sea state, vessel offset, bow heading, fluid content density and operating pressure. Recommendations were also made regarding control of curvature for drift-off and drive-off events, and for system requirements for emergency disconnect.
The report considered five different multi-service vessels, and the optimised configuration was found to provide for uptime operability in excess of 95% for vessel moon pool deployment. It was also found that deployment and recovery operations could be performed in more than 75% of the environmental conditions reviewed.
RiserTec’s overall operational conclusions on the IDP system and m-pipe® were that the IDP system and m-pipe® demonstrated suitability for nominal GoM weather and loop current conditions, and also provides better performance over equivalent hydraulic intervention pumping systems as follows:
Improved structural response
- Reduced loads at interfaces (both vessel and subsea)
- Reduced vessel specification and station keeping requirement
- Broad operational envelope with robustness and reduced downtime
Improved operational capability
- High pressure and flow rates
- Excellent chemical compatibility
- Low fatigue sensitivity high allowable strain and curvature
- Speed of mobilisation and deployment and retrieval
- Download the summary of the RiserTec global analysis report on the IDP – click here
- See the five minute Magma IDP system video of all of the main components – click here
- Animation of how the IDP system helps light well intervention and IDP flyover – click here
- Magma m-pipe® applications and benefits for hydraulic light well intervention – click here
- If you are interested in seeing the RiserTec report, please email Andrew.email@example.com