Petrobras - Cottonwood SSTB

Project Details & RCI Activities:

Project Date: May 2007
Location: Offshore Location GB 244 - GoM

The Cottonwood field is located in Garden Bank block 244, Cottonwood was Petrobras's first subsea development project in the Gulf of Mexico. It was also the first field in deep waters developed and put into production by Petrobras, as operator, outside Brazil. The field development consists of a two-well, long-distance subsea tieback via 27km (17 miles) of 152mm (6 inch) pipeline to the W&T-operated and Enterprise-owned fixed platform in East Cameron block 373. The wellheads feature 15,000psi enhanced horizontal subsea trees with a tree bore size of 5in x 2 in. The production is transported 24km (17 miles) via subsea pipelines to the host production platform. Control is by an umbilical consisting of two electrical quads for power and signal operations and eleven (11) super duplex steel tubes for hydraulic power and chemical injection.

Project Management Scope of Work:

  • Provided managers and engineers for managing all ROV and diving support vessels associated with the installation and tie-in of the 8" x 20-mile liquids line in 540FSW, dual 6" x 16.5-mile flowlines and associated risers, I-tube, PLETS, jumpers, and flying leads in 2,150FSW to 450FSW.
  • Included multiple mobilizations and simultaneous operations of two (2) DSVs and two (2) RSVs.
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