A power cable arrangement, in particular marine power cable, for offshore wind farms, including at least one cable drum device with a cable drum. The power cable arrangement includes at least one power cable wound on the cable drum with at least one cable end configured to pre-installing at a cable connection of a wind energy device. The power cable is wound on the cable drum such that a first section of the power cable is wound inversely to a further section of the power cable.

A power cable arrangement, in particular marine power cable, for offshore wind farms, including at least one cable drum device with a cable drum. The power cable arrangement includes at least one power cable wound on the cable drum with at least one cable end configured to pre-installing at a cable connection of a wind energy device. The power cable is wound on the cable drum such that a first section of the power cable is wound inversely to a further section of the power cable.

An attachment system for releasably attaching a sensor node to a cable when in a coupled state includes a clamp base and a clamp grip. The clamp base is fixed to a surface of the sensor node. The clamp base further includes a latch that is biased in a latched position when the attachment system is in both the coupled state and an uncoupled state. The clamp grip is pivotably attached the clamp base and biased in an open position when the attachment system is in the uncoupled state. The clamp grip is secured to the clamp base by the latch when the attachment system is in the coupled state.

A subsea cable system (10) for transfer of electric power to a subsea device is disclosed where the subsea cable system comprises a subsea cable (11) with a first end portion (26) and a second end portion (27). The first end portion (26) is adapted for connection to a supply of electrical energy. The subsea cable (11) comprises at least a first supply cable (21), a second supply cable (22) and at least one return cable (24, 25) where the first supply cable (21), the second supply cable (22) and the at least one return cable (24, 25) each comprises a conductor element (101, 102, 103, 104) for conduction of an electric current. The subsea cable system (10) further comprises a conductor transition element (66) comprising a conductor element (67) that is provided with at least a first conductor leg (73), a second conductor leg (74) and a third conductor leg (75). The first conductor leg (73) is connected to the conductor element (101) of the first supply cable (21), the second conductor leg (74) is connected to the conductor element (102) of the second supply cable (22) and the third conductor leg (75) is connected to conductor element (56) of an end supply cable (53) that is connectable to a consumer device (46). A method for supplying electrical power to a subsea consumer device of electricity is also disclosed.

A subsea cable system (10) for transfer of electric power to a subsea device is disclosed where the subsea cable system comprises a subsea cable (11) with a first end portion (26) and a second end portion (27). The first end portion (26) is adapted for connection to a supply of electrical energy. The subsea cable (11) comprises at least a first supply cable (21), a second supply cable (22) and at least one return cable (24, 25) where the first supply cable (21), the second supply cable (22) and the at least one return cable (24, 25) each comprises a conductor element (101, 102, 103, 104) for conduction of an electric current. The subsea cable system (10) further comprises a conductor transition element (66) comprising a conductor element (67) that is provided with at least a first conductor leg (73), a second conductor leg (74) and a third conductor leg (75). The first conductor leg (73) is connected to the conductor element (101) of the first supply cable (21), the second conductor leg (74) is connected to the conductor element (102) of the second supply cable (22) and the third conductor leg (75) is connected to conductor element (56) of an end supply cable (53) that is connectable to a consumer device (46). A method for supplying electrical power to a subsea consumer device of electricity is also disclosed.

A machine for applying at least one cable to a pipeline comprises: a frame extending along a longitudinal axis; a gripping and moving device mounted on the frame and configured to couple the machine around the pipeline and move the machine along the pipeline in a travel direction parallel to the longitudinal axis; and a cable application equipment comprising a rotating open ring structure, which is configured to rotate with respect to the frame and around the pipeline when the machine is gripping the pipeline; and an unwinding device for the controlled unwinding of a reel of cable; said unwinding device being mounted on said rotating open ring structure.

A subsea control bundle umbilical comprises: a carrier pipe; a bundle of elongate functional elements being tubes and/or cables that extend longitudinally within the carrier pipe; and spacers spaced apart longitudinally along the bundle. The spacers support the functional elements of the bundle and are movable longitudinally relative to the carrier pipe upon insertion during assembly, and also during installation of the umbilical and in use. As the umbilical does not convey production hydrocarbons flowing from a subsea well, any tubes within the carrier pipe have an inner diameter of no more than 70mm. Any such tubes contain only a control fluid or a service fluid for supporting production of hydrocarbons. Each spacer comprises a stack of blocks and an opening that extends along a longitudinal axis through the spacer at an interface between abutting blocks of the stack. Each opening receives a respective elongate functional element of the umbilical.

Provided is an offshore structure, especially offshore wind turbine, including a platform that is connected to the seabed, especially via a foundation that carries the platform, and an appliance, wherein it comprises guiding means for guiding at least one tube or cable along a guidance path from a respective entry point at which the tube or cable enters the platform to a respective connection point at which the tube or cable is connected or connectable to the appliance.

Provided is an offshore structure, especially offshore wind turbine, including a platform that is connected to the seabed, especially via a foundation that carries the platform, and an appliance, wherein it comprises guiding means for guiding at least one tube or cable along a guidance path from a respective entry point at which the tube or cable enters the platform to a respective connection point at which the tube or cable is connected or connectable to the appliance.

Described is a cable rejuvenation apparatus for a cable used in a subsea environment. The apparatus applies a bias signal to a conducting element of the cable, the bias signal being selected to improve the insulation properties of the cable. The bias signal is generated by a bias signal generator that includes a voltage source that generates a bias voltage having a time varying component. The bias voltage promotes an electrochemical reaction between the conducting element and the salt containing liquid of the subsea environment resulting in the formation of a barrier material at the fault location restricting further leakage current flow and enhancing the insulation resistance of the cable. The bias signal is a voltage selected such that the electrochemical reaction promoted by the bias voltage maintains the presence of the barrier material at the fault location.