Patent ID: 8684090

Claim:
A telescopic riser section device for a riser having a bottom end and a top end, said bottom end being arranged to connect to a wellhead and said top end being arranged to connect to a surface vessel, the device comprising: a telescopic pipe section disposed between the wellhead and the bottom end of the riser; at least one actuator arranged to cause a telescoping movement between the telescopic pipe section and the riser so as to apply a downward tensile force to the riser when the riser is connected to the well head and so as to lift the telescopic pipe section away from the well head when the riser is disconnected from the well head; an actuator-pressurizing circuit having a pressure fluid accumulator, the actuator-pressurizing circuit being connected to the at least one actuator and being arranged on the telescoping pipe section; wherein the actuator is selected from a group consisting of: a) a plurality of hydraulic cylinders arranged parallel with and outside of the telescopic pipe section, and b) an annular space between the telescoping pipe section and the bottom end of the riser, the actuator being actuated by a pressure fluid in liquid form supplied by the actuator-pressurizing circuit which is connected in a fluid-communicating manner to the annular space; wherein an upper end of the telescoping pipe section has a flange that abuts against a flame abutment on the riser, and comprising remote controlled locks on the flange abutment, wherein the remote controlled locks hold the telescoping pipe section in a raised position above the well head when the telescoping pipe section is lifted away from the well head.