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Shell Draugen

Shell Draugen

Norway Block 6407/9

Landmark: World’s first multiphase subsea pumps

The Draugen Subsea Well Facilities Contract was the largest subsea EPC contract in Norway at the time. All subsea installations were designed for diverless installation operation and maintenance. Interface standardization was emphasized throughout the project and resulted in a minimum of intervention tools. The seabed pumps (i.e., system integration of Framo pumps) were the world’s first commercial multi-phase pump installation.

The Draugen subsea well facilities comprises two four-slot water-injection templates with three trees each, two oil production satellite wells and one gas injection satellite well. The subsea well facilities are tied back to the field center, which is a fixed, gravity-based, mono-column concrete (GBS) platform installed at 920 ft (280 m).

  • Nine vertical 5"x2" 5,000 psi subsea trees
  • Templates with manifold and control distribution system
  • Electro-hydraulic control system with umbilical and topside controls
  • Workover riser and workover control system
  • Intervention tools package with intervention control system, including module replacement tools and tie-in tools
  • Integration of seabed pumps
  • Alloy steel block with Inconel-clad production wetted surfaces
  • Remote retrievable choke bridge arrangement
  • Pressure and temperature transducers on subsea tree
  • Vertical wireline access for production and annulus through tubing hanger/subsea tree
  • Diverless make-up flowline and controls umbilical
  • System integration testing, installation assistance, service and maintenance