Carbon Fibers
Ongoing Research And Onshore Applications Lead The Way
Deep subsea developments require integrated service umbilicals (ISUs) to transport hydrate control fluids, such as methanol, and hydraulic fluids to control valves at subsea wellheads. ISUs are typically made from small-diameter (typically 0.25 inches/6.5 mm up to 2 inches/50 mm) stainless steel tubes and/or s
Read MoreComposite Production Riser Projects
ABB Vetco Gray is currently developing a 10.05 inch (ID), all-carbon fiber, top-tensioned production riser, designed for use on TLPs and spars. The design enables operation at an internal pressure of 6,000 psi and a mean bulk temperature of 175°F. Ten prototypes are currently undergoing static and fatigue test
Read MoreStudies Support Viability Of Composites
Numerous studies have compared the performance and cost of steel and composite tendons. Conoco, Norske Conoco A/S (NCAS) and KOP headed several projects to qualify composite TLP tethers prior to launching a full sea test. In a recent study, they compared steel and composite TLP systems in water depths up to 9,
Read MoreOther Types Of Repairs Possible With Composites
Since 1995, DML Composites (Plymouth, U.K.) has been one of the pioneers in the use of customized wet layup repairs for offshore pipework and other platform component repairs. A project completed by DML in 2000 involved the in-service repair of a steel caisson on a platform in the North Sea. A caisson is a lar
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