... thicknesses at various water depths, attach foam buoyancy along the riser, use composite outer riser joints, and use hoop-reinforced-steel inner riser joints. This paper presents challenges of designing a dual casing TTR riser system for a spar in 10,000 ft water depth. Using proven and emerging...

...-tube analysis to determine the relative elongation and load sharing between the tubing, inner riser and outer riser under all load conditions. Riser and tubing elongation, internal fluid effects, seawater & riser temperature distributions under installation and operating conditions are all...

... utilizes the dual casing concept with surface BOPs similar to deepwater TLP applications1. This technologyfacilitates the use of platform drill rigs requiring specific modifications for riser handling. The Hoover drill riser consists of a 21" OD × 3/4" wall × 3,000 psi outer riser and a13-3/8" OD × .514...