Scope / Description:

• Contract type: Lump sum
• Mentor is providing engineering, procurement and project management
• Each facility utilizes production from wells completed beneath the spar and tied back through Top Tensioned Risers (TTR) and “dry” wellheads and trees. Additionally, tie-ins will be incorporated from subsea satellite wells
• Mentor’s scope includes nine (9) top tensioned production risers and associated equipment for Nansen and five (5) top tensioned production risers and associated equipment for Boomvang.
• Design work for SCR’s was performed to assess the impact on hull/truss design with regard to loads
• Fabrication of production deck
• Horizontal wet tow of spar hull
• Installing nine (9) driven piles in 3,700' water depth
• Upending hull at site
• Connecting hull to mooring system
• Installation of fixed ballast
• Fabricating, transporting & installing buoyancy cans
  

Innovation / Technology:

• 9 5/8” single casing riser design
• Single pieces, multi-chamber buoyancy cans
• Space saving surface wellhead
• Ten (10) foot space-out adjustment in addition to riser pups
• Internal tieback adapter to subsea wellhead & stress joint designed for 350 ft. nominal drilling offset
• Tensioning monitoring for each top tensioned riser
• Provision for “through the keel” tie-in of future import or export flowlines or pipelines up to 12”
• Driving piles in 3,700' water depth
• Mooring two derrick barges in 3,700' to lift deck using two (2) hooks