One subsea well is to be drilled on each of the two Pi structures. These will tieback separately to a 100-metric ton (110-ton) manifold within the Armada 500-m (1,640-ft) exclusion zone. The pipelines will be 8-in./12-in. (20.3/30.5-cm.) pipe-in-pipe systems, the inner pipe consisting of 22Cr or 13Cr steel, the outer pipe a combination of 22Cr steel, plastics, and/or carbon steel.
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