Patent ID: 6835026
Filing Date: 2004-12-28
Classification: E21B

Abstract:
An arrangement for transferring loads by means of one or more hydraulic cylinder-like actuators (19, 26, 40) in order to establish and maintain tension in a riser (1) of the type typically used in offshore petroleum production, where the riser (1) constitutes a connection between the sea bed (2) and an installation (4) on or near the surface of the sea (6), and where the required pressure difference between the pressure side(s) (18, 42) and the depressurised side(s) (17, 46) of the actuator(s) (19, 29, 40) is constituted by a hydrostatic pressure difference, characterised in that the pressure side(s) (18) of the actuator(s) (19, 29) is/are communicatingly connected with the seawater, directly or indirectly, via a pipe connection (22), an opening (28) being located at a considerable depth below the surface of the sea (6), and where the pipe connection (22) is substantially filled with a fluid with a lower density than that of water.