Jumbo has been awarded an FPSO mooring, installation and hook-up contract by EnQuest. EnQuest is redeveloping the Ardmore and Duncan fields as Alma and Galia respectively. This will be the first offshore project in which Jumbo acts as the main contractor.
The project scope is the mooring spread installation and FPSO tow out and hook up.
Alma and Galia Fields
EnQuest is redeveloping the Alma and Galia fields, located in Blocks 30/24, 30/25 and 30/29, 310 km south-east of Aberdeen in the UK North Sea. The fields will be brought on stream in 2013 using the Floating, Production, Storage and Offloading (FPSO) vessel ‘EnQuest Producer’, formerly known as the ‘Uisge Gorm’. This FPSO is currently under refurbishment at a repair yard in Hamburg, Germany.
Mooring Installation
Jumbo’s Heavy Lift Vessel Fairplayer will install the mooring spread for the EnQuest Producer in the middle of 2013. Utilising the hold and the onboard 900 t mast cranes, the Fairplayer takes all equipment onboard, transits to site and installs all equipment in one go. To ensure station keeping, the Fairplayer’s Dynamic Positioning System (DP2) will be used during installation activities.
The complete EnQuest project scope:
1. Storage of the chains and wires
2. Mooring leg installation
- Fabrication of the anchor piles
- Preparation, mobilisation of HLV Fairplayer, transit to field
- Installation of the anchor piles (9 pieces length 32-40m, diameter 84 inch, 72.5-84.5t)
- Installation of the bottom chains (9 x 130m, 142mm, 58t each)
- Installation of the mooring wires (spiral strand, 9 x 1150m, 94t each)
- Installation of the top chain (9 x 715m, 142mm, 316t each)
- Test loading of the anchor and bottom chain
- Demobilisation of HLV Fairplayer
3. FPSO tow out and hook-up
- FPSO tow preparations
- Tow from Hamburg yard to the field
- Field approach and station keeping
- Connecting of mooring legs
- Final tensioning of the mooring legs
