Patent ID: 9482059
Filing Date: 2016-11-01
CPC Classification: E21B

Claim Text:
1. A hybrid riser tower comprising a rigid riser column that extends upwardly from a seabed anchor and is defined by a bundle of parallel riser pipes, and a buoyancy unit positioned to apply tension to the riser column by buoyant upthrust when the tower is in an upright orientation for use, wherein: two or more jumper support structures that extend radially from the tower with respect to a central longitudinal axis of the tower are circumferentially spaced with respect to one another around the central longitudinal axis of the tower, are each attached to a side of the buoyancy unit disposed between upper and lower ends of the buoyancy unit when the tower is oriented for use, and support end fittings of jumper pipes at a level between the upper and lower ends of the buoyancy unit; and riser connections extend outside the buoyancy unit from the riser pipes of the riser column to the jumper support structures.