.... This is believed to be the industry's first ever topside retermination of an in service, steel tube umbilical. The success of this offshore operation is significant to Shell and the greater operations community due to anticipated maintenance of aging, steel tube umbilicals like the Europa umbilical. Shell has...

... in modeling for fatigue prediction. However, in deeper waters and larger umbilicals, such interactions can contribute to umbilical failure. Steel tube umbilicals (STUs) link a host/control platform to associated wells and provide the hydraulic, electrical, signal and chemical functionality required for each...

... in the dynamic portion of an umbilical system. Super-duplex steel is the most common. and a well-proven material to use in dynamic steel tube umbilicals. A new type coiled tubing has entered the market: zinc-eoated carbon steel. The material has already been used in a number of static umbilical projects...

... wells. A steel tube umbilical design utilizing relatively large diameter, carbon steel tubing was selected for this project. Design verification testing was conducted and the umbilical was successfully manufactured and installed. The viability of utilizing continuous carbon steel tubing for subsea...

... ABSTRACT This paper describes a new concept for steel tube umbilical, with an integrated optional methanol or service line. The theoretical basis of the umbilical concept is established, based on existing experience form flowline bundle developments. The umbilical characteristics...