UK Block Southwest Don 

Landmark: First FMC Frame Agreement in UK Sector

Project Overview

• Contract Award: 2007
• Sales: Aberdeen, U.K.
• Fabrication: Dunfermline, U.K.
• Service Base: Aberdeen, Norway
• Host Type: Dunbar
• Contract Type: Frame

Project Characteristics

• No. Trees: 4
• Water Depth: 168 m (550 ft)
• Tree Type: EHXT
• Tree Pressure: 10,000 psi
• Tree Bore Size: 5"x2"
• Hydrocarbon: Oil

Project Ownership

• PEDL   50%
• Valiant  50% 

Scope of Work

• Four (4) 5” x 2” 10,000 psi working pressure, maximum function Enhanced Horizontal Subsea Tree (EHXT)
• Concentric all metal sealing tubing hanger
• Bidirectional metal sealing wire line plugs
• Integral fishing friendly structure approved by Scottish Fishing Federation
• Production and gas lift chokes
• Tree mounted electro-hydraulic controls
• API swivel flange flow line connection
• Standard UWD-15 wellhead systems
• System integration, testing, installation assistance, service and maintenance

Comments

The maximum function EHXT is designed to be installed in any of the UK North Sea fields. The tree mounted direct hydraulic c

ontrols allow the tree to be interfaced with different types and suppliers of control systems based on a “plug and play” system using hydraulic and electrical jumper umbilicals with the appropriate connectors that interface with tree mounted controls This system allows the tree design to be standardized and provide the flexibility to be installed in brown and green fields. The integral fishing friendly structure (FFS) is the only protective structure approved by the Scottish Fisheries Federation and allows the tree assembly to be installed through a standard moon pool 36 m2 (361 ft) eliminating the need for a special installation.