Arrangement related to riser pipelines

Details Arrangement related to riser pipelines Arrangement related to riser pipelines

E - Fixed Constructions

21

B

E21B 17/01 (2006.01) E21B 43/01 (2006.01)

Patent

CA 2343544

A device in connection with a riser for the transport of oil and/or gas, possibly including water, from a transport system, transport pipe (5) or similar on the sea bed to a platform or similar. The solution is characterised in that, in order to use a riser (1) for the transport of oil and/or gas from a small field with low oil/gas production where a transport pipe (5) with a small diameter is used, a flexible pipe (4) with generally the same internal diameter as the transport pipe (5) is arranged inside the riser (1). At its upper and lower ends, the riser (1) is provided with a coupling (6, 7), which forms a seal between the transport pipe (5) and the flexible pipe (4) and also forms a seal at the ends of the riser so that it is closed.

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