Long Stroke Riser Tensioner System and Wellbay Structure for a Floating Unit

摘要

A riser tensioner system and a wellbay structure for a floating unit or platform for deep/ultra-deep water field development. The riser tensioner system includes a first cassette, a second cassette, a tension joint, one or more centralizers, and a plurality of cylinders. The one or more centralizers provide lateral support to the tension joint. Each of the plurality of cylinders comprises a first end, a second end, and an intermediate portion. The first end of each of the plurality of cylinders is secured to the first cassette, and an intermediate portion of each of the plurality of cylinders is secured to the second cassette. The wellbay structure includes a plurality of transverse girders and a plurality of longitudinal girders. The girders form a grid comprising a plurality of slots. Each of the plurality of slots is configured for receiving and supporting a first cassette of each a riser tensioner assembly.