The invention relates to a protection assembly for mounting in an underwater support structure, and to a method of installing such an assembly. According to one aspect of the invention, the protection assembly comprises at least one bend protection device (20a, 20b) coupled to a retaining device (18). The bend protection device (20a, 20b, 26) and the retaining device (18) together provide a through-going passage (32) for receiving an elongate member which is to be protected. The support structure (12) has an opening (16) through which the elongate member is passed, and the retaining device (18) is configured to be received in the opening (16) in the support structure and to engage with the support structure to resist subsequent withdrawal from it. Installation of the protection assembly comprises grasping an end portion of the protection assembly with a releasable clamp (100), arranging a pulling line to pass through the opening in the support structure to the mechanical clamp and securing the pulling line to the mechanical clamp (100), drawing the retaining device of the protection assembly into the opening (16) in the support structure using the pulling line and engaging the retaining device with the support structure, and releasing the clamp (100) from the protection assembly.

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. The bias signal can be a voltage which 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 selected such that the electrochemical reaction promoted by the bias signal maintains the presence of the barrier material at the fault location.

A self-supporting electric power cable is disclosed. The electric power cable includes an outer jacket portion and a core portion. The core portion includes at least one insulated conductor and at least one supporting cord. The at least one insulated conductor includes a number of individual wires, and the at least one supporting cord includes synthetic fibres. The number of individual wires, individually or arranged in bundles, are arranged in a first lay direction. The at least one insulated conductor and the at least one supporting cord are arranged in a second lay direction. The at least one supporting cord is arranged as a separate unit in a cross sectional sector of the self-supporting electric power cable. Thus flexible and durable power cable for sea use is provided. Also an offshore arrangement is disclosed herein.

A self-supporting electric power cable is disclosed. The electric power cable includes an outer jacket portion and a core portion. The core portion includes at least one insulated conductor and at least one supporting cord. The at least one insulated conductor includes a number of individual wires, and the at least one supporting cord includes synthetic fibres. The number of individual wires, individually or arranged in bundles, are arranged in a first lay direction. The at least one insulated conductor and the at least one supporting cord are arranged in a second lay direction. The at least one supporting cord is arranged as a separate unit in a cross sectional sector of the self-supporting electric power cable. Thus flexible and durable power cable for sea use is provided. Also an offshore arrangement is disclosed herein.

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.

The present invention concerns a device (1) designed to attach at least one cable (2) along a pipe (3), the device (1) comprising: a base (10) constituting a part of maximum height (H10) of the device (1); a channel (20) that extends along a longitudinal axis (X1) on an upper side of the device (1) and which is intended to receive the cable (2); a support surface (30) which is formed on a lower side of the device (1) and which is intended to rest against the pipe (3); two jaws which are formed protruding from the base (10) on the upper side, which border the channel (20) on either side of the longitudinal axis (X1) and which constitute a clamp (12) provided to grip the cable (2); and a transverse passage (40) which is formed through the base (10), between the channel (20) and the support surface (30), and which is intended to receive an attachment member (4) to press the device (1) against the pipe (3); characterized in that the device (1) comprises a longitudinal extension (50) prolonging the base (10), more elongated than the base (10) and having a height (H50) decreasing overall moving away from the base (10) along the longitudinal axis (X1).

The present invention concerns a device (1) designed to attach at least one cable (2) along a pipe (3), the device (1) comprising: a base (10) constituting a part of maximum height (H10) of the device (1); a channel (20) that extends along a longitudinal axis (X1) on an upper side of the device (1) and which is intended to receive the cable (2); a support surface (30) which is formed on a lower side of the device (1) and which is intended to rest against the pipe (3); two jaws which are formed protruding from the base (10) on the upper side, which border the channel (20) on either side of the longitudinal axis (X1) and which constitute a clamp (12) provided to grip the cable (2); and a transverse passage (40) which is formed through the base (10), between the channel (20) and the support surface (30), and which is intended to receive an attachment member (4) to press the device (1) against the pipe (3); characterized in that the device (1) comprises a longitudinal extension (50) prolonging the base (10), more elongated than the base (10) and having a height (H50) decreasing overall moving away from the base (10) along the longitudinal axis (X1).

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.

A system for transmission of power offshore comprises two or more power stations operably connected with a high voltage cable system. The high voltage cable system may comprise a dynamic, dry type high voltage submarine cable of varying length configured to transmit at least about 45 megawatts of power. In some cases the dynamic, dry type high voltage submarine cable comprises a first end connected to an offshore power station and second end connected to a static submarine cable system which is connected to an onshore power station. The systems may facilitate transmission of power for applications such as compressing and/or pumping subsea natural gas in deep water.