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Riser Designs:
Mentor Subsea Technology Services has the systems, procedures and methodology
to perform turnkey riser design, fabrication and installation projects.
The heart of the design analysis system utilizes the highly acclaimed
non-linear dynamic analysis software package "ABAQUS". Pre and post processors
are used to generate analysis models and perform design calculations.
This has allowed us to do most realistic modeling and "up-to-date" analyses
(Vortex Induced Vibration, soil structure interaction and buckling) that
is feasible to date, which are beyond the reach of most riser analyses
software available.
- Steel Catenary Risers (SCRs)
During the past two projects (Morpeth and Allegheny), Mentor Subsea
has designed and installed more dynamic SCRs than the rest of the industry
altogether. Some of the "Industry First" achievements are shallow water
(1570 feet) deployment of SCRs, use of stress joint and "S" lay of SCRs,
which has opened the door for reeling of SCRs. These achievements were
made possible by the ABAQUS based advanced riser design system and procedure.
- Flexible Risers
Mentor has been involved in several projects and gained valuable experience
in global design and installation of flexible risers. Providing the
most "up-to-date" design tools, Mentor is in a position to develop the
most cost effective riser solutions for fields in a wide range of water
depths.
- Surface Tensioned Risers
Vertically straight risers supported by several buoyancy modules (air
can) at the top of the riser used so far in Spar platforms. Mentor and
J. Ray McDermott are the only contractors who possess the detail design
and installation experience to provide this service.
- Hybrid Risers
Mentor was involved in the screening and conceptual study of feasibility
by using hybrid risers for a recent project. Until now, the hybrid riser
system has been more expensive, and therefore, only selected when no
other riser solution is workable. In-house study project work has shown
that a hybrid riser system can be designed at a substantially lower
cost. An innovative concept project is currently under consideration
for 6,000 - 8,000 feet water depth.
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