An original completion riser, the so-called Drill Pipe Riser (DPR) has been developed, which sharply decreases both subsea tree and tubing hanger running time. In addition, the cost of this system, including maintenance costs, is very low compared with conventional completion riser systems. The system is basically composed of drill pipes, control pod and control umbilical, which provides annulus access and pod Electro hydraulic multiplexed control. An existing type of drill pipe has been selected in order to minimize costs while improving reliability. This system has been modified to run a specially designed subsea tree from a dynamically positioned FPSO (SEILLEAN) to allow production of two piggy-back wells in water depths up to 2000 m (6500'). This paper describes the Drill Pipe Riser, the FPSO upgrade to operate in 2000 m water depth, the special subsea tree and its successful installation at 1853 m water depth, the current world record.
Development and installation of the drill pipe riser, an innovative deepwater production and completion/workover riser system
1999
11 Seiten, 2 Quellen
Conference paper
English
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