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CNR Banff

ConocoPhillips Banff

U.K. Block 29/2a

Landmark: Horizontal tree run from semi-submersible using extra landing string

The Banff field lies 15 miles (25 km) southeast of the Gannet accumulations in the Central North Sea, 120 miles (200 km) east of Aberdeen. It is located predominantly in the ConocoPhillips-operated Block 29/2a, extending into the neighboring Block 22/27a. The field has reserves of about 60 mmbo and approximately 39 bcf of natural gas. The oil will be produced at a rate of 60,000 bopd. The field life is approximately eight years.

The subsea architecture consisted of four horizontal production trees flowing to production manifolds via 4" flexible jumper flowlines. From the manifold, production flowed through a single 6" dynamic riser to a riser platform.

The Banff Field development is the first time the Ramform hull design has been used as a floating production system. The hull, which has a characteristic delta shape, provides both a large-load-bearing capacity (up to 16,000 tons) and a stable work platform, affording a compact alternative to a conventional parallel-sided tanker conversion.

  • Two horizontal 5"x2" 5,000 psi subsea trees
  • AISI 8630 fully inlaid with Inconel 625
  • All metal-to-metal sealing tubing hanger
  • Vertical wireline access for production bore
  • Hydraulic Torus IV tree connector
  • Integral tree cap with rigid lockdown
  • Diver makeup of flowlines
  • UWD-15 wellhead systems
  • Two horizontal 5"x2" 5,000 psi subsea trees
  • Workover control system
  • Integral overtrawlable structure
  • UWD-15 wellhead systems
  • System integration testing, installation assistance, service and maintenance