Innovations key reeled pipe-in-pipe flowline for gulf deepwater project

Four novel components of a reelable pipe-in-pipe flowline system were installed in BP PLC's Nile project in the US Gulf of Mexico in January 2001. Presented here are details of design and qualification testing for the insulation material, pipeline centralizers, buckle arrestors, and reelable water-stops.The Nile field is approximately 85 miles southeast of New Orleans in Viosca Knoll (VK) Blocks 913 and 914. The field produces primarily gas condensate and will be developed as a subsea tieback to the Marlin tension-leg platform (TLP) in VK 915 in water 3,245 ft deep (OGJ, Feb. 3, 1997, p. 26). The Nile tieback consists of a 7.5-km, 6 by 10-in. pipe-in-pipe connected to a 6-in. steel ca...

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