Patent ID: 6692193
Filing Date: 2004-02-17
Classification: E21B

Abstract:
An apparatus for supporting risers in a floating platform, the apparatus comprising:a hull top surface; a table disposed above the hull top surface, the table comprising a grid structure having columns and rows that define riser openings; a riser received in each of the riser openings; and a riser tensioner disposed in each of the riser openings and attached to the table, each riser tensioner comprising a plurality of cylinders selected from the group consisting of pneumatic cylinders and hydraulic cylinders; wherein a first riser tensioner in a first riser opening is symmetrically paired by a cross coupling to a second riser tensioner in a second riser opening, the cross coupling being effected by interconnecting plumbing between each cylinder of the first riser tensioner and a corresponding paired cylinder of the second riser tensioner.