Subsea damper unit

Abstract

A subsea damper unit comprising a cylinder body (C) equipped with an internal damper chamber (9) filled with damper oil (A), said damper chamber (9) contains a through-running piston rod (D) with a piston (7) that divides the damper chamber (9) into two chamber parts (9a,9b), and where the piston (7) is equipped with one or more valves (3) that permit fluid communication between said chamber parts (9a,9b). Mounted to each end of the cylinder body (C) is a compressible and fluid-filled chamber (F) with a fluid (B) that takes up the same pressure as the surrounding water pressure, where respective fluid chambers (F) are in fluid communication with each other, and the cylinder body (C) comprises a pressurization valve or membrane (3) that transmits the pressure from said fluid (B) in at least one of the compressible fluid chambers (F) to the damper oil (A) in the damper chamber (9).

Dependencies are inferred from the claim text.