Title: Method and anode mount for mounting an ICCP anode on an offshore construction

The invention relates to mounting an anode of an Impressed Current Cathodic Protection (ICCP) system to an offshore structure, preferably a wind turbine foundation pile, to provide the construction with cathodic protection.

It is known to provide offshore structures with anodes for Impressed Current Cathodic Protection (ICCP) systems to prevent, or at least slow down, corrosion of the construction.

For example, offshore wind turbines are supported by steel structures in the form of foundation piles and jacket like structures. To protect these structures against corrosion they can be provided with an ICCP system. The great benefit of ICCP systems over the more traditional protection systems that utilise sacrificial anodes is that with the ICCP systems the anodes can be used for a relatively long period.

An ICCP system typically comprises a control device, a power source, one or more anodes and one or more reference cells. The power source is connected to the structure to be protected and to the anodes to create a potential difference. The one or more reference cells monitor potential difference created by the ICCP system, and the control system controls the power source based on the information provided by the one or more reference cells.

Anodes for ICCP systems are available in a variety of shapes and sizes. Common anodes are disk shaped or rod shaped, and are mounted on a spacer frame to set the anode at a distance from the surface to be protected. The disk shaped anodes are supported by the spacer frame such that the anode surface faces away from the structure, and away from the spacer frame. When seen from the side, a disk shaped anode has a T-shaped configuration. There also are cylindrical, i.e. rod shaped, anodes. These are typically provided with two or more anodes that are supported by a single spacer frame. The spacer frame may bifurcates into multiple branches, each supporting an anode. Such a cathodic protection device for example also has a T-shape, or may have a Y-shape. The spacer frames are typically welded to the outside of a transition piece, i.e. the piece of a wind turbined foundation installed on top of a foundation pile. Furthermore, the spacer frames and anodes are either mounted on the transition piece prior to it being shipped, or are mounted to the transition piece after it has been installed on the foundation pile. For example, publication EP3635179 discloses two tubular anodes that are supported by a spacer frame that is welded to the foundation pile. The anodes are set up parallel to each other and parallel to the longitudinal axis of a wind turbine foundation pile. The anodes extend in a direction perpendicular to the support frame, providing the cathodic protection device with a T-shape configuration.

It is submitted that the way of providing the off shore constructions with anodes for an ICCP system is cumbersome and complicated. For example, the anodes and the spacer frames are relatively delicate, in particular compared to for example a transition piece. Thus, when an offshore construction is provided with the anodes, handling of the transition piece, for example hoisting the transition piece, stacking the transition piece on the deck of a vessel, becomes more difficult. Furthermore, due to the anodes protruding relative to the outside surface of the transition piece, the transition pieces need to be spaced further apart when on being stacked on the deck of a vessel to prevent the anodes from getting damaged.

Also, when a foundation pile is provided with anodes mounted to the outside surface of the pile, or with mounts welded to the outside surface of the pile to enable mounting the anode to the pile after the pile is installed in the seafloor, the foundation pile is provided with protrusion that make the pile harder to handle. For example, when a foundation pile is installed into the seafloor, it is typically supported by a ring shaped pile gripper. To not damage the pile gripper or the mounts for the anodes during the installation process, contact between the two needs to be prevented.

It is an object of the invention to provide an improved method for mounting an anode to an offshore construction. It is a further object of the invention to provide an anode mount that allows for an alternative way of mounting an anode to an offshore construction, preferably enables an improved method for mounting an anode to the foundation pile.

The invention therefore provides a method according to claim 1 , an assembly comprising a foundation pile, an anode mount and an anode according to claim 10, an anode mount according to claim 21 for providing a wind turbine foundation pile with an anode of a cathodic protection system, and an ROV (Remotely Operated underwater Vehicle) according to claim 32 for providing a wind turbine foundation pile with an anode mount.

A method for mounting an ICCP anode on an offshore foundation pile for a wind turbine, for protecting the outside surface of the foundation pile, according to the invention comprises the steps: - using an ROV inside the foundation pile for installation of a cylindrical anode through an aperture in a wall of the foundation pile; and

- mounting an anode mount on the wall of the foundation pile, the anode mount supporting the cylindrical anode outside the foundation pile.

With a method according to the invention, a cylindrical anode is mounted to an offshore foundation pile for supporting a wind turbine, using an ROV, from inside the foundation pile. The anode is mounted through an aperture in the wall of the foundation pile, and is mounted to the wall of the foundation pile with an anode mount supporting the anode.

With a method according to the invention, the anode is mounted from inside the foundation pile, through an aperture in the wall of the foundation pile. Because the ROV is used inside the foundation pile, it is not subjected to the amount of heave or currents that it would be subjected to when used outside the foundation pile. This facilitates mounting the anode, and increases the weather window in which the anodes can be mounted. Thus, the installation may require less time.

Furthermore, with a method according to claim 1, the anode is mounted in the aperture, for example is clamped on the wall of the foundation pile or is fixed to the inside of the foundation pile, for example by welding or bolting. Therefore, the outside surface of the foundation pile can be free of mounts or support frames for mounting an anode to the foundation pile. The outside surface of the foundation pile therefore may remain featureless, which facilitates storage, transport and manipulating of the foundation pile.

The invention therefore provides an improved method for mounting an anode to an offshore construction.

Furthermore, a method according to the invention enables the installation of anodes in foundation piles. Providing anodes on the foundation piles, instead of, or in addition to, providing anodes on the transition piece, enables the ICCP system to generate a more evenly distributed field. Anodes mounted on the transient piece are located above, or at the top end of, the foundation pile. This position prevents them from covering the whole foundation pile easily, and requires them to generate a more amplified, and therefore often skewered, field. In the prior art, anodes are typically installed on transition pieces, and not on the foundation piles, because the transition pieces are relatively small and therefore easier to manipulate compared to foundation piles. It is very difficult to prevent anode mounts welded on foundation piles from getting damaged during transport and installation of the monopile.

In a further embodiment of a method according to claim the invention, the method comprises the steps:

- coupling the ROV with the anode mount, the anode mount supporting the cylindrical anode;

- lowering the ROV with the anode mount and anode inside the foundation pile, using a lifting device, e.g. a hoisting winch with an associated hoisting cable;

- supporting the ROV with the anode mount and anode at the aperture, using the lifting device;

- aligning the cylindrical anode with the aperture in the wall of the foundation pile, using the ROV;

- moving the anode through the aperture, using the ROV and/or the lifting device;

- mounting the anode mount to the wall of the foundation pile, preferably using the ROV, e.g. by welding, bolting, clamping, etc; and

- decoupling the ROV from the anode mount.

In this method, the ROV is supported by a lifting device, e.g. a crane, hoisting winch, etc. Thus, the ROV does not have to generate the upward movement for lifting the anode, but only has to position the anode relative to the aperture, e.g. keeping the anode in a horizontal position and/or moving the anode into and/or through the aperture. Therefore, a more compact ROV can be used.

Both the ROV and the lifting device can be used for moving the anode through the aperture.

In an embodiment, the lifting device is configured to move the ROV towards the aperture, and thus to move the anode through the aperture. As an alternative, only the thrusters of the ROV are used to move the ROV towards the aperture, and thus to move the anode through the aperture. In a further embodiment of this method, the lifting device is a first lifting device and a second lifting device is also used. In such a method, the first and second lifting device can be used for lifting and lowering the ROV, as well as for positioning aligning the cylindrical anode with the aperture in the wall of the foundation pile. In a further embodiment, the first lifting device is used for lifting and lowering the ROV, while the second lifting device is used for aligning the cylindrical anode with the aperture in the wall of the foundation pile. In the latter case, during the aligning process, the ROV is supported by the first lifting device while the second lifting device is used for pivoting the ROV about a horizontal axis to align the cylindrical anode with the aperture in the wall of the foundation pile.

In an embodiment of this method, the ROV extends along a longitudinal axis between a front end and a back end, the ROV supports the anode at the front end of the ROV, and the ROV is provided with a first coupling device for the first lifting device near or at the back end of the ROV and with a second coupling device for the second lifting device near or at the front end of the ROV. In this embodiment, the first lifting device is connected to the first coupling device of the ROV and a second lifting device is connected to the second coupling device of the ROV.

In a further embodiment, the method for lowering the ROV with the anode mount and the anode inside the foundation pile comprises: using the first lifting device for supporting and for lowering the ROV, wherein the ROV is supported in a vertical position with its front end directed downwards, and aligning the cylindrical anode with the aperture in the wall of the foundation pile using the second hoisting device to lift the front end of the ROV relative to the back end, to thus bring the ROV in a horizontal position with its front end directed towards the wall of the foundation pile.

In such an embodiment, the ROV is lowered in a substantial vertical position, the front of the ROV, with the anode mount and anode, directed downwards. Once the ROV is at the level of the aperture into which the anode mount, with the anode, is to be mounted, the ROV is picoted into a horizontal position, i.e. in a position in which the longitudinal axis fo the ROV and the longitudinal axis of the anode are substantially horizontal.

In addition to pivoting the ROV from a substantial vertical position into a horizontal position, the first lifting device may be used to vertically align the ROV am anode mount with anode relative to the aperture.

In an embodiment wherein two lifting devices are used, the second lifting device can be used to control the horizontal orientation of the ROV, i.e. to bring the ROV in a horizontal position and to keep the ROV in that position. Once in the horizontal position, both the first and second lifting device can be used to adjust the vertical position of the ROV while maintain its horizontal orientation.

In such a method, the thrusters of the ROV are not needed for bringing the ROV in the horizontal position, or to keep the ROV in that position. Thus, the ROV can be provided with small and compact thrusters, and the ROV can be more compact and light weight.

In an embodiment, the thrusters can be used to support the action of the first and/or second lifting device and or for small adjustments of the position of the ROV, for example to the left or right, and/or for pivoting the ROV about a vertical axis.

In a preferred method according to the invention, moving the anode through the aperture comprises using the ROV, i.e. the thrusters of the ROV, to push the anode through the aperture while the ROV is supported by the first lifting device and optionally the second lifting device. In such an embodiment, the ROV may use wires of the first and optionally second lifting device as a swing. If necessary, the first and optionally second lifting device may adjust the length of these wires to adjust the vertical position of the ROV.

In an embodiment, a method according to the invention comprises the step of providing the wall of the offshore foundation pile with the aperture for mounting the anode, the aperture allowing for the anode and at least part of the anode mount to be passed through the aperture from a first side of the wall to a second side of the wall. Providing the foundation pile with an aperture allows for mounting a mount in the aperture, and furthermore allows for mounting a mount according to the invention by clamping the mount in the opening. Thus, with such a method it is not necessary to weld the mount in position

In a further embodiment according to the invention, the aperture comprises a central opening and two or more radially extending channels, more preferably the aperture comprises a central opening and two radially extending channels, more preferably the aperture is an oval opening.

Providing the aperture with three or more radially extending channels provides the aperture with a star like configuration. For example, the aperture can be a polygon, e.g. is square or a triangular shaped, c.q. having four or three radially extending channels.

However, in the most simple form, the aperture comprises two channels that, in opposite directions, extend radially from a central opening. Such an aperture essentially has an essentially elongate shape, and can for example be an oval shaped aperture. An oval shape is beneficial because it is a simple shape, having only two radially extending channels, while the curved outline prevents the peak pressures in the foundation pile that may occur with an outline comprising sharp angles, such as a triangular shape. It is however noted that a triangular shape can also be provided with rounded corners, and thus with a curved outline, to reduce peak pressures in the wall of the foundation pile. in an embodiment, the aperture in the wall of the foundation pile comprises a curved outline. Such an outline is without sharp angles and thus prevents, or at least reduces, peak pressures in the wall of the foundation pile.

By pproviding the foundation pile with an aperture that comprises a central opening and two or more radially extending channels in combination with an anode mount having a base bracket and a gripper bracket, for engaging the wall of the foundation pile gripper, wherein the gripper bracket has two or more radially extending arms, the gripper bracket of the anode mount and the aperture in the foundation pile are configured such that by rotating the gripper bracket about a horizontal axis, after moving the gripper bracket through the aperture, the gripper bracket is moved in a position wherein it overlaps with the wall of the offshore structure. In this position the overlapping parts of the gripper bracket, and/or gripping members mounted on the gripper bracket, can be moved towards the wall to engage the wall. When the base bracket, and/or gripping members mounted on the base bracket, are positioned against the inside surface of the wall, the wall is clamped between the gripper bracket and the base bracket, or between gripping members mounted on the gripper bracket and/or the base bracket, and the anode mount is mounted in the aperture.

For example, when the gripper bracket and the aperture both are oval shaped, rotating the gripper bracket over a ninety degree angle after passing it through the aperture brings the outer ends of the gripper bracket in a position in which they no longer overlap with the aperture in the wall, but with the wall. When the base bracket also overlaps with the wall, the wall can be clamped between the gripper bracket and the base bracket, or between gripping members mounted on the gripper bracket and/or the base bracket.

It is submitted that, for the gripper bracket to be able to be passed through the aperture, the width and the radius of the arms of the gripper bracket are smaller than the width and length of the channels of the aperture they are to be passed through.

In a further method according to the invention, the anode mount comprises: - a core body, the core body extending along a core axis between an anode end and a base end;

- an anode seat, mounted to the core body at the anode end thereof, for supporting the anode with the anode extending in a direction parallel to the core axis;

- a base bracket, mounted to the core body, for engaging a first side of the wall of the foundation pile; and

- a gripper bracket, mounted to the core body, for engaging a second side of the wall of the foundation pile, wherein the second side of the wall is opposite the first side of the wall, and wherein the gripper bracket is located between the base bracket and the anode seat; wherein the gripper bracket has two or more arms that extend in a radial direction relative to the core axis, for, in a first position passing the gripper bracket through the aperture, from the first side of the wall to the second side of the wall, with the arms of the gripper bracket passing through the channels of the aperture, and for in a second position, in which the gripper bracket is rotated relative to the first position about the core axis, overlapping with sections of the wall located between the radially extending channels of the aperture to enable the arms of the gripper bracket to engage the second side of the wall.

In such a method, the gripper bracket has two or more arms that extend in a radial direction relative to the core axis of the anode seat, and the aperture is provided with channels that are shaped and sized to enable the arms of the gripper bracket to pass through them, and thus allow for the gripper bracket to pass through the aperture. By providing the aperture with radially extending channels, sections of the wall extend radially inward between those channels. The sections of the wall form area’s the enable the gripper bracket to engage the wall, after being passed through the aperture and the gripper bracket being rotated into the second position. Thus in such an embodiment, the gripper bracket can be rotated relative to the aperture between a first position, in which the arms of the gripper bracket are aligned with the channels of the aperture, for passing the gripper bracket through the aperture in the wall of the foundation pile, and a second position, in which the arms of the gripper bracket are misaligned with the channels of the aperture, for engaging the wall of the foundation pile with the gripper bracket.

In such a method, the method further comprises the steps: - aligning the core axis of the anode mount with the aperture, when aligning the cylindrical anode with the aperture in the wall of the foundation pile, using the ROV and/or a second lifting device;

- aligning the arms of the gripper bracket with radial channels of the aperture;

- moving the anode seat and the gripper bracket of the anode through the aperture using the ROV, when moving the anode through the aperture, preferably using the ROV;

In such an embodiment, the anode seat is provided with a base bracket and a gripper bracket for mounting the anode mount in the aperture. The gripper bracket is configured to be moved through the aperture, such that it can engage the wall of the offshore structure from the outside. The base plate engages the wall from inside the offshore structure.

In such a method, preferably the method further comprises the steps:

- after moving the anode seat and the gripper bracket of the anode through the aperture using the ROV, rotating the gripper bracket relative to the aperture about the core axis of the anode, preferably by rotating the ROV or part of the ROV about the core axis, and thus misaligning the arms of the gripper bracket with the channels of the aperture;

- mounting the anode mount to the wall of the offshore construction by moving the gripper bracket and the base bracket and/or by moving clamping parts provided on the gripper bracket and/or base bracket towards respectively an outside surface and an inside surface of the wall of the foundation pile, to clamp the wall between the gripper bracket and the base bracket.

It is submitted that the axis of the core body is herein referred to as the core axis and as the core axis.

In a further method, the gripper bracket is rotated relative to the aperture and relative to the base bracket about the core axis of the core axis of the anode mount by pivoting the gripper bracket about the core axis of the anode mount.

In a method, the gripper bracket and the aperture are configured such that by rotating the gripper bracket about a horizontal axis, e.g. the core axis when the ROV and anode are supported in a horizontal position, after moving the gripper bracket through the aperture, the gripper bracket is moved in a position wherein it overlaps with the wall of the offshore structure. In this position the overlapping parts of the gripper bracket, and/or gripping members mounted on the gripper bracket, can be moved towards the outside surface of the wall to engage the wall. When the base bracket, and/or gripping members mounted on the base bracket, are positioned against the inside surface of the wall, the wall is clamped between the gripper bracket and the base bracket, and the anode mount is mounted in the aperture.

For example, when the gripper bracket and the aperture both are oval shaped, rotating the gripper bracket over a ninety degree angle after passing it through the aperture brings the outer ends of the gripper bracket in a position in which they no longer overlap with the aperture in the wall, but with the wall.

In addition or as an alternative, the ROV may be provided with an anode mount engagement device configured to rotatable support the anode mount. For example, the ROV may be provided with grippers or a magnet for engaging the anode mount, that can be moved relative to the ROV main body to thus rotate the anode mount and anode about a horizontal axis, preferably about a longitudinal axis of a cylindrical anode mounted to the seat of the anode mount. Thus the anode mount, and anode, can be rotated while the main body, e.g. the part of the ROV that is hooked to a lifting device, remains in its position.

In an embodiment of the method according to the invention, the gripper bracket is oval, and therefore has two arms that extend in a radial direction relative to the core axis,

A method according to the invention may also comprises providing a foundation pile with one or more apertures for mounting an anode.

In an embodiment, the offshore foundation pile has a diameter of at least 4 meters, preferably has a diameter of at least 6 meters, and/or has a height of at least 20 meters, preferably has a height of at least 30 meters.

It is submitted that the offshore foundation pile is an offshore construction. The invention also allows for performing a method according to the invention on an offshore construction. In an embodiment of a method according to the invention, the offshore construction is a wind turbine foundation pile, the foundation pile having a diameter of at least 5 meters.

In an embodiment, the method furthermore comprises providing the offshore construction, e.g. the wind turbine foundation pile, with an aperture for mounting the anode, preferably wherein the aperture is oval shaped. In a further method according to the invention, the method comprises connecting the anode with an anode power cable, preferably from an inward facing side of the wall, i.e. from the side opposite the site wherein the anode will be mounted during use.

In an alternative method, the anode power cable is already connected to the anode during he installation process, i.e. while the anode is moved through the aperture.

The invention furthermore provides an assembly for supporting a wind turbine for performing a method according to the invention, the assembly preferably comprising an offshore construction, i.e. a foundation pile, an anode mount and an ROV.

The invention therefore furthermore provides an assembly, preferably and assembly for supporting a wind turbine, the assembly comprising:

- an offshore foundation pile for a wind turbine, the foundation pile having a wall with an aperture for mounting an anode;

- an ICCP anode mount, wherein the anode mount is configured to be mounted in the aperture in the wall of the offshore foundation pile and has an anode seat; and

- an ICCP anode for protecting the outside surface of the foundation pile, wherein the anode is mounted to the anode seat of the anode mount; and wherein the aperture for mounting the anode comprises a central opening and two or more radially extending channels, the aperture allowing for the anode and at least part of the anode mount to be passed through the aperture from a first side of the wall to a second side of the wall, wherein the anode mount comprises:

- a core body, the core body extending along a core axis between an anode end and a base end;

- an anode seat, mounted to the core body at the anode end thereof, for supporting the anode with the anode extending in a direction parallel to the core axis;

- a base bracket, mounted to the core body, for engaging a first side of the wall of the foundation pile; and - a gripper bracket, mounted to the core body, for engaging a second side of the wall of the foundation pile, wherein the second side of the wall is opposite the first side of the wall, and wherein the gripper bracket is located between the base bracket and the anode seat; wherein the gripper bracket has two or more arms, the number of arms being equal or less than the number of channels of the aperture, that extend in a radial direction relative to the core axis, for, in a first position passing the gripper bracket through the aperture, from the first side of the wall to the second side of the wall, with the arms of the gripper bracket passing through the channels of the aperture, and for in a second position, in which the gripper bracket is rotated relative to the first position about the core axis, overlapping with sections of the wall located between the radially extending channels of the aperture to enable the arms of the gripper bracket to engage the second side of the wall.

In the second position of the gripper bracket, the arms of the gripper bracket and the base bracket overlap with the wall of the foundation pile, which allows for clamping the wall between the gripper bracket and the base bracket, or between gripping members mounted on the gripper bracket and/or the base bracket.

In a further embodiment of the assembly, the aperture comprises a central opening and two radially extending channels. In a further embodiment of the assembly, the aperture is an oval opening.

In a further embodiment of the assembly, the anode is a cylindrical anode and the anode has a longitudinal core axis that is parallel, preferably coincides, with the core axis of the anode mount, when the anode is mounted to the anode seat of the anode.

In a further embodiment, the cylindrical anode has a longitudinal core axis and a diameter perpendicular to the longitudinal core axis, and the width and the length of the gripper bracket, in a direction perpendicular to the core are larger than a diameter of the cylindrical anode, such that the anode can be moved through the aperture in which the anode mount is to be mounted.

It is submitted that the part of the aperture for passing through the core body and the anode seat of the anode mount is herein also referred to as the central opening of the aperture. The parts of the aperture for passing through the arms of the gripper bracket are herein also referred to as the channels of the aperture, more in particular the two or more channels extending in a radial direction from the central opening of the aperture.

In an embodiment, the assembly further comprises a ROV, for positioning the anode mount, and the anode mounted to the anode seat of the anode mount, relative to the aperture in the wall of the foundation pile and for installation of the anode through the aperture in the wall of the foundation pile, from the inside of the foundation pile,

In an embodiment, the assembly further comprises a first lifting device, the first lifting device comprising a winch and an associated lifting cable, for supporting the ROV with the anode mount and the anode.

In an embodiment, the assembly furthermore comprises a foundation pile having a wall and an aperture in the wall for mounting an anode with the anode mount.

In an embodiment, the assembly furthermore comprises a first lifting device for supporting the ROV, preferably at a back end of the ROV.

In a further embodiment, the assembly furthermore comprises a second lifting device for supporting the ROV, preferably at a front end of the ROV.

An ICCP anode mount according to the invention is, configured for mounting an anode of an ICCP system on an offshore construction, e.g. a foundation pile for a wind turbine. The anode mount is configured to be mounted in an aperture in a wall of the offshore construction, and the anode mount comprises: a core body, the core body extending along a core axis between an anode end and a base end, an anode seat, mounted to the core body, at the anode end thereof, for supporting the anode with the anode extending in a direction parallel to the core axis, a base bracket, mounted to the core body, for engaging a first side of the wall, a gripper bracket, mounted to the core body for engaging a second side of the wall, wherein the second side of the wall is opposite the first side of the wall, wherein the base bracket and the gripper bracket extend in a direction perpendicular to the core axis of the core body and are spaced relative to each other such that the wall of the offshore foundation can be positioned between the base bracket and the gripper bracket when the core body is in the aperture of the wall, and wherein the gripper bracket and/or the base bracket are configured to be moved towards each other and/or are provided with clamping parts that are configured to be moved towards the other bracket, to engage the wall and clamp the wall between the gripper bracket and the base bracket.

An anode mount according to the invention enables a anode to be mounted in an aperture in the wall of a foundation pile. Thus the anode, and the anode mount, do not need to be mounted on the foundation pile prior to the foundation pile being installed. This allows for a foundation pile with none or with a reduced number of protrusions, and therefore facilitates installation, storage and manipulating the foundation pile.

Furthermore, an anode according to the invention allows for mounting a cylindrical anode from inside the foundation pile, using an ROV. Because the ROV is used inside the foundation pile, it is not subjected to the amount of heave or currents that it would be subjected to when used outside the foundation pile. This facilitates mounting the anode. Also, compared to mounting anodes using a ROV outside a foundation pile, the weather window that allows for the installation of anodes is increased.

The invention therefore provides an anode mount that allows for an alternative way of mounting an anode to an offshore construction, preferably enables an improved method for mounting an anode to the foundation pile.

It is submitted that preferably, the anode mount is configured to be mounted in an aperture in a wall of the offshore construction, the aperture having a central opening and radially extending channels. In such an embodiment of the anode mount, the gripper bracket has two or more arms that extend in a radial direction relative to the core axis, for, in a first position passing the gripper bracket through the aperture, the aperture having a central opening and radially extending channels that overlap with the arms, from the first side of the wall to the second side of the wall, and for in a second position, in which the gripper bracket on the second side of the wall and is rotated relative to the first position about the core axis, overlapping with sections of the wall located between the radially extending channels of the aperture to enable the gripper bracket to engage the second side of the wall. Thus, in the second position, the outer ends of the gripper bracket no longer overlap with the aperture in the wall, but with the wall.

Thus, seen in a direction about the central aperture, the channels are positioned between sections of the wall. In other words, a ring having a radius larger than the radius of the opening and smaller than the radius of the arms is, when concentric with the central opening, blocked from passing through the aperture by the wall sections between the channels.

Furthermore, the base bracket of the anode mount is configured such that it overlaps with the areas of the wall between the radially extending channels of the aperture, at least when the gripper bracket has been moved into the second position. For example, the base bracket has arms that are shaped and positioned similar to the arms of the gripper bracket. In such an embodiment, the wall, more in a particular parts of the wall are positioned between the respective arms of the base bracket and the gripper bracket when the anode mount is in the second position. In an alternative embodiment, the base bracket is for example disc shaped, the disc having a radius similar to or larger than the radius of the arms of the gripper bracket.

In a further embodiment of an anode according to the invention, the gripper bracket is located between the base bracket and the anode seat and the anode mount is thus configured for being mounted from the first side of the wall, wherein the first side of the wall is an inward facing side of the wall, i.e. from the side of the wall opposite the side where the anode is mounted during use.

In a further embodiment, the anode is a cylindrical anode, the cylindrical anode having a longitudinal core axis and a diameter perpendicular to the longitudinal core axis, and wherein the width and the length of the gripper bracket, in a direction perpendicular to the core axis, are larger than a diameter of the cylindrical anode, such that the anode can be moved through the aperture in which the anode mount is to be mounted.

In a further embodiment of an anode according to the invention, the anode mount, preferably the core body of the anode mount, is configured to be engaged by a lifting device, and preferably is configured to enable rotation of at least the anode seat about the core axis while the anode mount is supported by the lifting device.

In a further embodiment of an anode according to the invention, the core body comprises a channel for guiding through an anode power cable. In a further embodiment of an anode according to the invention, the base bracket and/or the gripper bracket is/are provided with clamping parts, e.g. bolts, that can be moved relative to the bracket or brackets to engage a surface of the offshore structure, to clamp the wall between the gripper bracket and the base bracket.

In a further embodiment of an anode according to the invention, the base bracket can be moved along the core axis relative to the base bracket. Thus, in such an embodiment, the base bracket and/or the gripper bracket are moveably mounted on the anode mount, for movement along the core axis relative to the other bracket. Preferably, clamping parts are provided for securing the base bracket and/or the gripper bracket in a clamping position for mounting the anode in the aperture.

In a further embodiment of an anode according to the invention, the gripper bracket can be rotated about the core axis relative to the base bracket.

In a further embodiment of an anode according to the invention, the anode mount, preferably the base bracket of the anode mount, is configured to be engaged by an ROV.

In a further embodiment of an anode according to the invention, the gripper bracket is elongated shaped, having two arms that extend on opposite side of the core axis.

In a further embodiment of an anode according to the invention, the gripper bracket is oval shaped.

In an embodiment, the anode mount is provided with a mount for a reference cell, preferably, the reference cell and the anode are mounted on the anode mount.

In an embodiment of an anode mount according to the invention, the gripper bracket is a polygon, e.g. is square or a triangular shaped.

Preferably, the shape of the aperture in the foundation pile matches the shape of the gripper bracket, while being configured to allow for the gripper bracket to pass through the aperture. Thus, both the aperture and the polygon can be the same polygonal shape, for example can both be triangular shaped, while the dimensions of the aperture are slightly larger to enable the gripper bracket to pass through the aperture. In an alternative embodiment, the aperture may have more channels than the bracket has arms, for example the aperture has four channels forming an X-shape, while the gripper bracket has two arms forming an l-shape. Such an embodiment of aperture and gripper bracket provides the gripper bracket with two positions, one rotated ninety degrees relative to the other, in which the channels of the aperture overlap with the arms of the gripper bracket, and the gripper bracket can pass through the aperture. Furthermore, in such an embodiment, the gripper bracket has to be rotated over an angle of forty five degrees to move the gripper bracket into a second position that enables the gripper bracket to engage the wall of the foundation pile. The invention furthermore provides an ROV (remotely operated vehicle) configured for use in a method according to the invention, the invention thus provides an ROV for mounting an anode mount according to the invention into an aperture in a wall of an offshore construction. The ROV preferably is configured to be supported by a first lifting device, e.g. a crane or hoisting winch, and optionally a second lifting device, e.g. a crane or hoisting winch, while positioning the anode mount relative to the aperture.

In an embodiment, a ROV for mounting an anode mount according to the invention into a aperture in an offshore construction, is configured to be supported by a crane while positioning the anode mount relative to the aperture.

In a further embodiment, the ROV is provided with a coupling device, e.g. one or more grippers or magnets, for engaging the anode mount. Preferably, the ROV is furthermore configured to mount the anode mount in the aperture, e.g. is provided with devices for bolting and/or welding and/or moving gripping devices of the anode mount into a gripping position to fix the anode mount in the aperture.

In a further embodiment, the ROV extends along a longitudinal axis between a front end and a back end, wherein the ROV is provided at the front end of the ROV with a coupling device, e.g. one or more grippers or magnets, for engaging the an anode mount, preferably the anode mount according to the invention, preferably the base plate of an anode mount according to the invention. Furthermore, the ROV preferably is configured for engaging the anode mount such that the core axis of the anode mount supported by the ROV is parallel to the longitudinal axis of the ROV, e.g. has a coupling device at a front end thereof for engaging a anode mount such that a longitudinal axis of an anode supported by the anode mount is parallel to, preferably coincides with a longitudinal axis of the ROV.

In an embodiment, the ROV is provided with a coupling device for engaging the anode mount at the front end of the ROV, and the coupling device is configured to rotate the anode mount relative to the ROV about a rotational axis, wherein the rotational axis preferably coincides with a longitudinal axis of a cylindrical anode supported by the anode mount. Thus, in such an embodiment, the coupling device is rotatably supported by the ROV. , e.g. one or more grippers or magnets, for engaging the an anode mount, preferably the anode mount according to the invention, preferably the base plate of an anode mount.

In an embodiment, a ROV for mounting an anode mount according to the invention into a aperture in an offshore construction, is configured to be supported by a crane while positioning the anode mount relative to the aperture.

In a further embodiment, the ROV is provided with a first coupling device for the first lifting device near or at the back end of the ROV and with a second coupling device for a second lifting device near or at the front end of the ROV.

Thus, the ROV can be supported by a first lifting device, e.g. a crane or hoisting winch, at a back end of the ROV, and the ROV can be supported by a second lifting device, e.g. a crane or hoisting winch, at a front end of the ROV. In such an embodiment, the lifting device supports the ROV on opposite sides of a center of gravity, seen in a longitudinal direction of the ROV, the longitudinal direction of the ROV.

Furthermore, in such an embodiment, one hoisting device can be used to lower and lift the ROV, while the second lifting device can be used to pivot the ROV about a horizontal axis from a vertical position into a horizontal position. Both lifting devices can be sued to align the ROV and the anode and anode mount supported by the ROV with the aperture.

Thus, when lifting or lowering the ROV using the first lifting device, the ROV is positioned in a substantial vertical position. This is beneficial when the length of the ROV, in particular the length of the ROV combined with the length of a anode and anode seat supported by the ROV, is sufficiently larger than the diameter of the ROV. In such an embodiment, when in a substantial vertical position, the ROV has a small footprint and can thus be positioned away from the wall, or walls, of the foundation pile while being lowered and/or lifted. Thus, the chance of the ROV and anode accidentally contacting the foundation pile, or for example equipment mounted to the inside of the foundation pile, is reduced and therefore the chance of damaging the ROV and the anode during lifting and lowering is reduced.

It is submitted that the hoisting device is mounted in the offshore structure above the water surface, and the anode is to be mounted below the water surface, typically several tens of meters below the water surface. Therefore, when the hoisting device is a crane or winch, the hoisting wire is, or the hoisting wires are, able to pivoted like a pendulum to enable movement of the ROV in a horizontal direction without substantial vertical movement of the ROV in the vertical direction. Furthermore, the crane or winch can be used to compensate for any vertical movement caused by horizontal movement of the ROV by taking in or paying out wire. In a further embodiment, the ROV is configured to rotate the coupling device, or part thereof, to thus rotate the anode mount, and preferably an anode mounted to the anode mount, about the core axis of the anode mount.

In a further embodiment, the ROV has an ROV frame and has an anode support frame, wherein the coupling device is mounted on the anode support frame, and wherein the anode support frame is rotatably mounted in the ROV frame, to enable rotation of the anode mount, and preferably an anode mounted to the anode mount, about the core axis of the anode mount by rotating the anode support frame relative to the ROV frame about the core axis.

In a further embodiment, the ROV according to the invention comprises multiple thrusters, and one or more of the thrusters are orientated to compensate the moment force caused by the weight of the anode and the ROV while being supported by the lifting device, and to control the orientation of the anode, preferably while the ROV is supported by a lifting device.

Using the ROV in combination with a crane allows for a compact ROV, and therefore for increased manoeuvrability of the ROV with anode in the confines of the offshore structure, e.g. the foundation pile of a wind turbine.

In a further embodiment of an ROV according to the invention, the ROV comprises multiple thrusters, and wherein one or more of the thrusters are orientated for rotating the ROV, and an anode mount and anode held by the ROV, about the core axis of the anode mount, preferably while the ROV is supported by a lifting device.

In an alternative embodiment of an ROV according to the invention, the ROV is configured to be lifted and lowered, and to be aligned with the aperture, by a single lifting device. In such an embodiment, the ROV preferably comprises counter ballast for compensating the weight of the anode relative to a point where the ROV is supported by the lifting device.

In a further embodiment, the ROV is provided with one or more magnets for engaging, and supporting, the anode mount.

In an embodiment, the ROV is provided with a support point for connecting the ROV to the lifting device, and the support point is movably mounted on the ROV, such that the ROV can be rotated about a horizontal axis of rotation, for example by using thrusters of the ROV, while the ROV is supported by the lifting device. Preferably, the ROV is furthermore configured such that when it engages and supports a anode mount according to the invention, the horizontal axis of rotation of the ROV is aligned with the core axis of the anode mount. Thus, when the ROV is rotated about the horizontal axis of rotation, the anode mount, and an anode mounted to the seat of the anode mount, are rotated about the core axis, and the anode is not moved in a horizontal or vertical position.

In an embodiment, the ROV is provided with multiple mounting cylinders, each for securing a bolt or nut, wherein the mounting cylinders each comprise a longitudinal chamber for holding the nut or bolt, the walls of the longitudinal chamber having teeth for engaging the sides of the bolt or nut.

Therefore, the anode mount is provided with a gripper bracket that is configured to be passed through the aperture. Furthermore, in the embodiment shown, the base bracket is moveably supported, such that it can move parallel to the core axis of the anode mount and relative to the gripper bracket. Also, the gripper bracket is provided with bolts that extend parallel to the core axis of the anode mount, and thus parallel to the direction of movement of the base bracket. The bolts extend through apertures in the base bracket. Therefore, by tightening a nut on each of these bolts, the gripper bracket is pulled towards the base bracket, and the wall can be clamped between the base bracket and the gripper bracket.

In an embodiment of an anode mount according to the invention, the base bracket and/or the gripper bracket are/is provided with clamping parts, e.g. in the form of bolts, that can be moved relative to the respective bracket to engage the wall of the offshore structure. By moving the clamping parts, e.g. by tightening the bolts, against the wall surface the respective bracket is pushed away from that wall surface, and the other bracket is pulled towards the opposite wall surface. Thus, the wall is clamped between the base bracket and the gripper bracket, more in particular the wall is clamped between the base bracket or the clamping parts provided on the base bracket on one side of the wall and the gripper bracket or the clamping parts provided on the gripper bracket on the opposite side of the wall.

The invention furthermore provides an assembly for mounting an ICCP anode on an offshore foundation pile for a wind turbine, for protecting the outside surface of the foundation pile.

The assembly comprises an anode mount according to the invention and an anode, wherein the anode is mounted, e.g. is bolted, to the anode seat of the anode mount. In a further embodiment of the assembly, the anode is a cylindrical anode and wherein the anode has a longitudinal core axis that is parallel, preferably coincides, with the core axis of the anode mount.

In a further embodiment of the assembly, the cylindrical anode has a longitudinal core axis and a diameter perpendicular to the longitudinal core axis, and wherein the width and the length of the gripper bracket, in a direction perpendicular to the core are larger than a diameter of the cylindrical anode, such that the anode can be moved through the aperture in which the anode mount is to be mounted.

In a further embodiment of the assembly, the assembly further comprises a ROV according to the invention, for positioning the anode mount and preferably the anode relative to the aperture in the wall of the foundation pile.

In a further embodiment of the assembly, the assembly further comprises a lifting device, the lifting device comprising a winch and an associated lifting cable, for supporting the ROV with the anode mount and the anode.

In a further embodiment, the assembly furthermore comprises a foundation pile having a wall and an aperture in the wall for mounting an anode with the anode mount.

In a further embodiment of the assembly, the aperture has a central opening, for passing through the core body of the anode mount and the anode, and has two or more channels that extend in a radial direction from the central opening, for passing through two or more arms of the gripper bracket.

In a further embodiment of the assembly, the gripper bracket and the aperture are oval shaped.

The invention furthermore provides an ICCP anode mount, configured for mounting an anode of an ICCP system on an offshore construction, e.g. a foundation pile for a wind turbine, wherein the anode mount is configured to be mounted in a aperture in a wall of the offshore construction, the anode mount comprising: an anode seat, the anode seat having a core axis, for mounting the anode to the anode mount such that the anode, or an spacer tube of the anode, extends in a direction parallel to the core axis, abase bracket, for supporting the anode mount on a first side of the wall, a gripper bracket, for supporting the anode mount on an second side of the wall, wherein the second side of the wall is opposite the first side of the wall, wherein the base bracket and the gripper bracket extend in a direction perpendicular to the core axis and are spaced relative to each other, such that the wall of the offshore foundation can be positioned between them, and wherein the gripper bracket and the base bracket are configured to be moved towards each other and/or are provided with clamping parts that are configured to be moved towards the other bracket, to engage the wall and clamp the wall between the gripper bracket and the base bracket.

In an embodiment, the foundation pile is at the aperture provided with a seat for fixing the anode mount onto the foundation pile. The seat may be welded to the inside surface of the foundation pile, and is configured to couple with the anode mount. For example, the seat may comprise wired apertures for receiving bolts, to enable bolting the anode mount to the seat, and thus to the foundation pile.

The invention furthermore provides a method for mounting an ICCP anode mount, configured for mounting an anode of an ICCP system on an offshore construction, e.g. a foundation pile for a wind turbine, in a aperture in a wall of the offshore construction, the method comprising the steps: coupling an ROV and the anode mount; supporting the anode mount with the ROV; aligning the core axis of the anode mount with the aperture using the ROV; moving the anode seat and the gripper bracket of the anode through the aperture using the ROV; rotating the gripper bracket relative to the aperture about the core axis of the anode; mounting the anode mount to the wall of the offshore construction by moving the gripper bracket and the base bracket towards each other and/or by moving clamping parts provided on the gripper bracket and/or base bracket towards the other bracket, preferably using the ROV, to engage the wall and clamp the wall between the gripper bracket and the base bracket; releasing the anode mount form the ROV.

The invention furthermore provides a wind turbine foundation pile provided with one or more apertures for mounting an anode mount, preferably an anode mount with an cylindrical anode mounted to the mount, in the aperture from inside the foundation pile, preferably with an ROV, wherein the one or more apertures preferably each comprises a central opening and two or more radially extending channels, more preferably the apertures each comprises a central opening and two radially extending channels, more preferably the apertures each are oval openings. Such a wind turbine foundation pile can also be part of an assembly according to the invention.

The invention furthermore provides an ICCP anode mount, configured for mounting an anode of an ICCP system on an offshore construction, e.g. a foundation pile for a wind turbine, wherein the anode mount is configured to be mounted in an aperture in a wall of the offshore construction, the anode mount comprising: a core body, the core body extending along a core axis between an anode end and a base end, an anode seat, mounted to the core body, at the anode end thereof, for supporting the anode with the anode extending in a direction parallel to the core axis, a base bracket, mounted to the core body, for engaging a first side of the wall, a gripper bracket, mounted to the core body for engaging a second side of the wall, wherein the second side of the wall is opposite the first side of the wall, wherein the base bracket and the gripper bracket extend in a direction perpendicular to the core axis and are spaced relative to each other such that the wall of the offshore foundation can be positioned between the base bracket and the gripper bracket when the core body is in the aperture of the wall, and wherein the gripper bracket preferably is oval shaped, and wherein the gripper bracket and/or the base bracket are configured to be moved towards each other and/or are provided with clamping parts that are configured to be moved towards the other bracket, to engage the wall and clamp the wall between the gripper bracket and the base bracket.

The invention furthermore provides an ICCP anode mount, configured for mounting an anode of an ICCP system on an offshore construction, e.g. a foundation pile for a wind turbine, wherein the anode mount is configured to be mounted in an aperture in a wall of the offshore construction from a first side of the wall to position the anode on a second side of the wall, wherein the second side of the wall is opposite the first side of the wall, the anode mount comprising: a core body, the core body extending along a core axis between an anode end and a base end, an anode seat, mounted to the core body, at the anode end thereof, for supporting the anode with the anode extending in a direction parallel to the core axis, a base bracket, mounted to the core body, for engaging the first side of the wall, a gripper bracket, mounted to the core body for engaging the second side of the wall, wherein the base bracket and the gripper bracket extend on opposite sides of, and in a direction perpendicular to, the core axis of the core body, and wherein the base bracket and the gripper bracket are spaced relative to each other such that the wall of the offshore foundation can be positioned between the base bracket and the gripper bracket when the core body is in the aperture of the wall, and wherein the gripper bracket and/or the base bracket are configured to be moved towards each other and/or are provided with clamping parts that are configured to be moved towards the other bracket, to engage the wall and clamp the wall between the gripper bracket and the base bracket.

It will be appreciated by the skilled person that a technical feature discussed herein as required or as optional with respect to one embodiment of the invention may be equally applicable to one or more other embodiments described herein, with the feature performing its designation function. Such combinations are all envisaged herein unless a combination would result in a technical impossible solution and/or not meet the desired functionality.

Whilst primarily presented for illustrative purposes with reference to one or more of the figures, any of the technical features addressed below may be combined with any of the independent claims of this application either alone or in any other technically possible combination with one or more other technical features.

In the figures, components corresponding in terms or construction and/or function are provided with the same last two digits of the reference numbers.

The invention will now be discussed with reference to the drawings. In the drawings:

Fig. 1 shows a first exemplary embodiment of a ROV with an anode mount and anode supported by a lifting device in a foundation pile of a wind turbine;

Fig. 2 shows the ROV of Fig. 1 with the anode aligned with an aperture in a wall of the foundation pile;

Fig. 3 shows the anode moved through the aperture;

Fig. 4 shows the anode mount, supporting the anode, fixed in the aperture and the ROV decoupled from the anode mount;

Fig. 5 shows a second exemplary embodiment of a ROV with an anode mount and anode supported by a lifting device, wherein the anode mount comprises a gripper bracket and a base bracket;

Fig. 6 shows the ROV of Fig. 5 with the anode moved through the aperture;

Fig. 7 shows the ROV, the anode mount and the anode rotated about a horizontal axis, the gripper bracket and anode bracket now overlapping with a wall of the foundation pile;

Fig. 8 shows the anode mount, supporting the anode, fixed in the aperture and the ROV decoupled from the anode mount;

Fig. 9 shows a third exemplary embodiment of a ROV with an anode mount and anode supported by a first lifting device in a foundation pile of a wind turbine;

Fig. 10 shows the ROV of Fig. 9 supported by the first and a second lifting device and with the anode aligned with an aperture in a wall of the foundation pile;

Fig. 11 shows the anode moved through the aperture, using the thrusters of the ROV, and with the anode and anode seat being rotated over an angle of 90 degrees;

Fig. 12 shows the anode mount, supporting the anode, fixed in the aperture and the ROV decoupled from the anode mount; Fig. 13 shows a perspective view of an anode mount, supporting an anode, according to the invention and part of a wall of a foundation pile with an aperture, the anode mount being mounted in the aperture;

Fig. 14 shows an alternative perspective view of the anode mount with anode of fig. 13;

Fig. 15 shows an exploded view of the anode mount of Fig. 13;

Figure 16 shows a frontal view of gripper bracket comprising three arms extending in a radial direction relative to the core axis of an anode mount; and

Figure 17 shows a frontal view of an aperture in a wall of a foundation pile, which opening is configured to cooperate with the gripper bracket of Fig. 16. supported by a lifting device in a foundation pile of a wind turbine;

Fig. 1 shows a first exemplary embodiment of a ROV 1 with an ICCP anode mount 2 according to the invention. The anode mount 2 is provided with a cylindrical shaped anode 3.

The ROV 1, anode mount 2 and anode 3 are supported by a lifting device 4, in the embodiment shown a hoisting winch 5 wit associated hoisting wire 6, inside a wind turbine foundation pile 7.

The wind turbine foundation pile 7 is mounted in the sea floor 8. The wind turbine foundation pile 7 is furthermore provided with a transition piece 9, on top of which a wind turbine may be mounted. The wind turbine foundation pile is provided with an aperture 11 for, according to the invention, mounting the anode 2, from inside the foundation pile, on the foundation pile. It is submitted that the anode is to be used for protecting the outside of the foundation pile and is thus to be positioned on the outside of the foundation pile to effectively generate a field for the ICCP system.

By using the hoisting winch of the lifting device, the ROV can be lowered and lifted inside the foundation pile. Furthermore, in the exemplary embodiment shown, the hoisting device can be moved to move the ROV relative to the wall of the foundation pile. In an alternative embodiment, the hoisting device can be fixed in place, and thrusters of the ROV are used to move the ROV relative to the wall of the foundation pile.

It is submitted that in the figures the ROV is submerged, i.e. is supported by the lifting device below the water level. It is envisaged that the ROV and hoist are entered into the wind turbine support above the water level, that the hoist is mounted and is used for lowering the ROV into the water and into apposition wherein it is level with the aperture in the wall of the wind turbine support.

In the exemplary embodiment shown, the ROV is provided with thrusters for positioning the ROV and the anode.

The anode mount 2 is configured for mounting the anode 2, which anode is part of an ICCP system, on the offshore construction, in the embodiment shown the foundation pile 7 for a wind turbine.

Furthermore, according to the invention, the anode mount 2 is configured to be mounted in the aperture 11 in a wall of the offshore construction.

In the exemplary embodiment shown, the anode mount 2 comprises a core body 12, an anode seat 13 and a base bracket 14.

The core body 12 of the anode mount extends along a core axis 15 between an anode end 16 and a base end 17.

The anode seat 13 is mounted to the core body 12, at the anode end 16 thereof, for supporting the anode 3 with the anode extending in a direction parallel to the core axis 15.

The base bracket 14 is mounted to the core body 12, and extends in a direction perpendicular to the core axis 15, for engaging a first side 19 of a wall 18 of the wind turbine foundation pile 7. In the embodiment shown the first side 19 is the inside of the wall 18 of the wind turbine foundation pile 7.

The figures 1-4 show an example of a method according to the invention, i.e. a method for mounting the ICCP anode 3 on an offshore foundation pile 7 for a wind turbine, for protecting the outside surface of the foundation pile, wherein the method comprises:

- using the ROV 1 inside the foundation pile 7 for installation of the cylindrical anode 3 through the aperture 11 in the wall 18 of the foundation pile 7; and - mounting the anode mount 2 on the wall 18 of the foundation pile 7, the anode mount 2 supporting the cylindrical anode 3 outside the foundation pile 7.

Figure 1 shows the ROV 1 coupled with the anode mount 2, and the anode mount supporting the cylindrical anode 3.

In figure 2 the ROV 1 with the anode mount 2 and anode 3 is lowered inside the foundation pile 7, using the lifting device 4.

The ROV 1 , the anode mount 2 and the anode3 are supported at the aperture 11 , by the lifting device 4.

Furthermore, in figure 2, the ROV 1 is used to aligned the anode with the aperture 11 in the wall of the foundation pile, such that the anode can be moved through the aperture.

In figure 3, the anode 3 is moved through the aperture 11, using the ROV 1 and the lifting device 4.

In figure 4, the anode 3 is mounted to the wall 18 of the foundation pile 7, in the exemplary embodiment shown using the ROV to bolt the base bracket to the inside surface of the foundation pile.

In an embodiment, the foundation pile is at the aperture provided with a seat for fixing the anode mount onto the foundation pile. The seat may be welded to the inside surface of the foundation pile, and is configured to couple with the anode mount. For example, the seat may comprise wired apertures for receiving bolts, to enable bolting the anode mount to the seat, and thus to the foundation pile.

The ROV 1 is, after the base bracket was mounted to the wall, decoupled from the anode mount 2.

Figure 5 shows a second exemplary embodiment of a ROV 101 with an anode mount 102 and anode 103 supported by a lifting device. In this embodiment, the anode mount 102 comprises a gripper bracket 120 in addition to a base bracket 114. In the embodiment shown, the aperture 111 is an elongated opening, the longitudinal axis of the opening extending perpendicular to the plane of the drawing. The ROV 101 is submerged and is supported, with the anode mount 102 and anode 103, in front of an aperture 111 in a wall 118 of a foundation pile 107.

The base bracket 114 is mounted to the core body 112 of the anode mount 102 for engaging a first side 119 of the wall 118.

The gripper bracket 120 is mounted to the core body 112 for engaging a second side 121 of the wall 118, wherein the second side of the wall is opposite the first side of the wall, in the embodiment shown, the first side 119 is the inside surface of the wall 118 of the foundation pile, and the second side 121 is the outside surface of the wall 118 of the foundation pile.

The base bracket 117 and the gripper bracket 120 extend in a direction perpendicular to the core axis 115 and are spaced relative to each other such that the wall 118 of the offshore foundation 107 can be positioned between the base bracket 117 and the gripper bracket 120 when the core body 112 is positioned in the aperture 111 of the wall 118.

In the exemplary embodiment shown, the base bracket 117 is provided with clamping parts that are configured to be moved towards the gripper bracket 120, to engage the wall 118 and clamp the wall between the gripper bracket 120 and the base bracket 117.

In the exemplary embodiment shown, the anode is a cylindrical anode, the cylindrical anode having a longitudinal core axis and a diameter perpendicular to the longitudinal core axis, and wherein the width and the length of the gripper bracket, in a direction perpendicular to the core axis, are larger than a diameter of the cylindrical anode, such that the anode can be moved through the aperture in which the anode mount is to be mounted.

Furthermore, in the embodiment shown, the aperture 111 is an elongated opening, the longitudinal axis of the opening extending perpendicular to the plane of the drawing. The base bracket 114 and the gripper bracket are also elongated, in a direction perpendicular to the core axis of the anode mount, and are similar shaped, but smaller dimensioned, to the aperture 111. The longitudinal axis of the brackets extends perpendicular to the plane of the drawing in figures 5 and 6, and extends parallel to the plane of the drawing in figures 7 and 8.

This configuration of the aperture and gripper bracket allows for engaging the wall with the gripper bracket by rotating the anode mount about a horizontal axis. Rotating the gripper bracket over a nighty degree angle after passing it through the aperture brings the outer ends of the gripper bracket in a position in which they no longer overlap with the aperture in the wall, but with the wall.

Figure 6 shows the ROV with the anode moved through the aperture, the gripper bracket and base bracket extending in a direction perpendicular to the plane of the drawing, and aligned with the aperture 111.

Figure 7 shows the ROV, the anode mount and the anode rotated about a horizontal axis, the gripper bracket and anode bracket now overlapping with a wall of the foundation pile.

Figure 8 shows the anode mount, supporting the anode, fixed in the aperture and the ROV decoupled from the anode mount.

In figure 8, the anode mounted is fixed in the aperture by clamping the wall between the base bracket and the gripper bracket, in the exemplary embodiment shown by using clamping means provided on the base bracket.

In the embodiment shown, the clamping parts are bolts that are rotatably mounted in the base bracket. Once the anode mount is positioned such that the gripper bracket and the base bracket overlap with the wall of the foundation pile, the bolts can be turned to engage the inside surface of the wall, thus clamping the wall between the gripper bracket and the base bracket, more in particular between the gripper bracket and the bolts mounted in the base bracket. in an alternative embodiment, the clamping parts may comprise a spanner like mechanism that is located between the gripper bracket and the base bracket, for example is mounted on the side of the base bracket facing the gripper bracket. Thus, once the anode mount is in a position wherein parts of the wall of the underwater structure are positioned between the base bracket and the gripper bracket, the spanner mechanisms can be activated to clamp the wall between the gripper bracket and the base bracket, more in particular between the gripper bracket and the spanner mechanism.

Preferably the ROV is configured to activate any clamping parts mounted on the base bracket and/or gripper bracket. In an embodiment, the ROV is configured to tighten bolts mounted in the base bracket. For example, the ROV can be provided with drivers for fastening bolts.

In the embodiment shown in figures 5-8, the aperture 111 is an elongated opening, and the gripper bracket also 120 has an elongated shape. Thus, the aperture comprises a central opening and two radially extending channels, forming the elongated opening, and the gripper bracket comprises two arms that extend in a radial direction relative to the core axis of the anode mount, The gripper bracket has a shape similar to the shape of the aperture, but is dimensioned smaller than the aperture, such that the gripper bracket can pass through the aperture.

When the longitudinal axis of the gripper bracket is parallel to the longitudinal axis of the aperture, the gripper bracket can be moved through the aperture. When the gripper bracket is subsequently rotated over an angle of ninety degrees, the longitudinal axis of the gripper bracket extends perpendicular to the longitudinal axis of the aperture, and the wall of the foundation pile, more in particular sections of the wall of the foundation pile, are positioned between the gripper bracket and the base bracket. In this position, the anode mount can be clamped onto the foundation wall.

Thus, in the embodiment shown in figures 5-8 the gripper bracket has two arms that extend in a radial direction relative to the core axis of the anode mount, for, in a first position passing the gripper bracket through the aperture, from the first side of the wall to the second side of the wall, with the arms of the gripper bracket passing through the channels of the aperture, and for in a second position, in which the gripper bracket is rotated relative to the first position about the core axis, overlapping with sections of the wall located between the radially extending channels of the aperture to enable the arms of the gripper bracket to engage the second side of the wall.

The figures 9-12 show an example of a method for mounting the ICCP anode 303 on an offshore foundation pile 307 for a wind turbine similar to the one shown in figures 1-5, be it that in this method two lifting devices are used. Furthermore, in this method the anode mount is rotated about a ninety degree angle to enable it to be clamped on the wall of the foundation pile.

Fig. 9 shows a third exemplary embodiment of a ROV 301 with an ICCP anode mount 302 according to the invention. The anode mount 302 is similar to the anode mount 2 shown in figures 1-4. The anode mount 302 is provided with a cylindrical shaped anode 303.

In the method shown in figures 9-12, a first lifting device 304 and a second lifting device 340 are provided for supporting and orientating the ROV. In the embodiment shown, both hoisting devices comprise a hoisting winch 305 wit associated hoisting wire 306. In figure 9, the ROV 301 , anode mount 302 and anode 303 are supported by the first lifting device 304 inside a wind turbine foundation pile 307

In the method shown, the ROV 301 extends along a longitudinal axis 322 between a front end 323 and a back end 324. The ROV supports the anode 303 at the front end 323 of the ROV. The ROV 301 is provided with a first coupling device 325 for the first lifting device 304 near or at the back end 324 of the ROV, and with a second coupling device 325 for the second lifting device 340 near or at the front end 323 of the ROV 301. The first lifting device 304 is connected to the first coupling device 325 of the ROV and the second lifting device 340 is connected to the second coupling device 326 of the ROV.

Figure 9 shows the lowering of the ROV 301 with the anode mount and anode inside the foundation pile using the first lifting device. The ROV is supported in a vertical position with its front end directed downwards.

Figure 10 shows the second lifting device being used to lift the front end of the ROV 301 relative to the back end 324, and to thus bring the ROV in a horizontal position with its front end 323 directed towards the wall of the foundation pile. Thus, the first lifting device 304 and second lifting device 340 can be used to align the cylindrical anode with the aperture in the wall of the foundation pile.

Figure 11 shows how the anode 303 has been moved through the aperture 311 in the wall 318 of the foundation pile. The ROV 301 is, i.e. the thrusters 310 of the ROV are, used to push the anode through the aperture while the ROV is supported by the first lifting device 304 and the second lifting device 340.

Furthermore, in figure 11 the anode 303 has been rotated about the core axis 315 of the anode mount 302, after the anode was passed through the aperture. Thus, in figure 11 the gripper bracket 320 overlaps with the wall of the foundation pile, which allows for the anode mount 302 to be mounted in the aperture.

In figure 12, the ROV 301 is decoupled from the anode mount 302. The anode mount 302, supporting the anode 303, is fixed in the aperture 311. In, the exemplary embodiment shown, the anode mount is mounted to the wall 318 of the foundation pile 307 using the ROV to tighten bolts in the base bracket to engage the inside surface of the foundation pile, and thus clamp the wall between the gripper bracket and the base bracket, more in particular between the gripper bracket and the bolts mounted in the base bracket. In figure 12, the ROV 301 is supported by the first lifting device 304 and second lifting device

340. Subsequently, the ROV will be lifted back to the surface by the first lifting device 304.

Figure 13 shows a perspective view of an ICCP anode mount 402. The anode mount 402 is configured for mounting an anode of an ICCP system on an offshore construction, e.g. a foundation pile for a wind turbine. In the embodiment shown, the anode mount supports an anode 403. Figure 14 shows an alternative perspective view of the anode mount 402, and figure 15 shows an exploded view of the anode mount 402.

The anode mount 402 is configured to be mounted in an aperture in a wall of the offshore construction from a first side of the wall to position the anode on a second side of the wall, wherein the second side of the wall is opposite the first side of the wall.

The anode mount comprises a core body 412, an anode seat 413, a base bracket 414 for engaging the first side of the wall, and a gripper bracket 420 for engaging the second side of the wall. The gripper bracket is located between the base bracket and the anode seat and the anode mount is thus configured for being mounted from the first side of the wall, wherein the first ide of the wall is an inward facing side of the wall, i.e. from the side of the wall opposite the second side where the anode is mounted during use.

The core body 412 extends along a core axis 415 between an anode end 416 and a base end 417, and the base bracket 414 and the gripper bracket 420 are mounted to the core body. In the embodiment shown,, the core body 412 comprises a channel 426 for guiding through an anode power cable.

The base bracket 414 and the gripper bracket 420 extend in a direction perpendicular to the core axis 415 of the core body 412, and are spaced relative to each other such that the wall of the offshore foundation can be positioned between the base bracket and the gripper bracket when the core body is in the aperture of the wall,

The anode seat 413 is mounted to the core body 412, at the anode end 416 thereof, for supporting the anode 403 with the anode extending in a direction parallel to the core axis 415.

In addition to the anode mount 402, the figures 13-16 furthermore show a section of a wall 418 of a foundation pile, wherein the wall is provided with an aperture 411 for mounting the anode mount 402 in the wall 418. In figures 13 and 14, the anode mount 402 is mounted in the aperture 411. This is the position in which the anode is used for protecting the foundation pile.

Figure 13 shows a first side 419 of the wall 418, the first side faces the inside of the foundation pile. Figure 14 shows a second side 421 of the wall 418, the second side faces the outside of the foundation pile.

According to the invention, the anode mount 402 is configured for being mounted in the aperture 411 of the wall 418 from the first side of the wall 419, to support the anode on the second side of the wall 421. Therefore, the anode mount 402 is provided with a gripper bracket 420 that is configured to be passed through the aperture 411. In the embodiment shown, the gripper bracket 420 is configured for cooperating with an elongate, in the embodiment shown an oval shaped, aperture 411.

In figures 13-16, the aperture 411 is oval shaped. Therefore, the aperture 411 has a central opening 422 and two radially extending channels 423, the channels extending along a longitudinal axis of the oval opening, on opposite sides of the central opening.

To cooperate with this oval opening, the gripper bracket 420 has two or more arms 425 that extend in a radial direction relative to the core axis 415 of the anode mount 402.

Thus, in a first position of the gripper bracket 420 relative to the aperture 411 , the radially extending channels of the aperture overlap with the radially extending arms of the gripper bracket, and the gripper bracket can pass through the aperture 411 from the first side of the wall to the second side of the wall.

Once the gripper bracket 420 has been passed through the aperture, the gripper bracket is rotated over an angle of ninety degrees relative to the aperture into a second position. In figures 13-15, the anode is depicted with the gripper plate in this second position. In the second position, the arms of the gripper bracket 420 overlap with sections of the wall located between the radially extending channels of the aperture. In this position the gripper bracket can engage the second side of the wall.

It is noted that in the embodiment shown, the gripper bracket and the base bracket can not be rotated relative to each other about the core axis. Thus, when the gripper bracket is moved from the first position into the second position, the base bracket is also moved from a first position into a second position. In an alternative embodiment, the gripper bracket can be rotated about the core axis relative to the base bracket. Furthermore, in the embodiment shown, the gripper bracket 420 and the base bracket 414 are configured to be moved towards each other, more in particular the base bracket is configured to be moved along the core axis relative to the gripper bracket, to engage the wall and clamp the wall between the gripper bracket and the base bracket.

In the embodiment shown, the base bracket 414 is moveably supported, such that it can move parallel to the core axis 415 of the anode mount 402 and relative to the gripper bracket 420.

Also, the gripper bracket 420 is provided with bolts 424 that extend parallel to the core axis 415 of the anode mount 402, and thus parallel to the direction of movement of the base bracket 414. The bolts 424 extend through apertures in the base bracket 414. Therefore, by tightening a nut, not shown, on each of these bolts 424, the gripper bracket 420 is pulled towards the base bracket 414, and the wall 418 can be clamped between the base bracket and the gripper bracket.

In an alternative embodiment, the base bracket is for example provided with clamping parts in the form of bolts that can be moved relative to the base bracket to engage the first side, i.e. the inside surface of the offshore structure. By tightening these bolts, the base bracket is pushed away from the inside surface of the wall, and the gripper bracket is pulled onto the outside surface of the wall, thus, the wall is clamped between the base bracket and the gripper bracket, more in particular between the bolts mounted in the base bracket and the gripper bracket.

It is submitted that an ROV according to the invention is provided with a coupling device, e.g. one or more grippers or magnets, for engaging the an anode mount, preferably for engaging the base plate of the anode mount. Furthermore, the ROV preferably is configured for rotating the anode mount about a core axis of the anode mount, and thus for rotating a cylindrical anode supported by the anode mount about a longitudinal axis of the anode. Thus, the gripper bracket of the anode mount can be rotated by the ROV from a first position, for passing the gripper bracket through the aperture, to a second position, for clamping the wall between the base bracket, or the clamping parts provided on the base bracket, on one side of the wall and the gripper bracket, or the clamping parts provided on the gripper bracket, on the opposite side of the wall.

Fig. 15 shows an exploded view of the anode mount of Fig. 13. In the figure, the base bracket 414 is shown separate from the gripper bracket 420, and the base bracket and the gripper bracket are spaced relative to the first side 419 of the wall, i.e. the inside surface of the wall, and the second side 421 of the wall, i.e. the outside surface of the wall, respectively.

The gripper bracket of an anode mount according to the invention has two or more arms, that extend in a radial direction relative to the core axis of the anode mount, to cooperate with the channels that extend in a radial direction relative to a central opening of an aperture in a wall of an offshore foundation. Thus, the gripper bracket can be positioned relative to the aperture in a first position, in which position the channels overlap with the arms and the gripper bracket can be passed through the aperture in the wall of the offshore foundation from the first side of the wall to the second side of the wall.

Furthermore, the gripper bracket can be positioned relative to the aperture in a second position, in which position the arms of the gripper bracket overlap with sections of the wall that are located between the radially extending channels of the aperture. In this second potion the gripper bracket, or clamping means provided on the gripper bracket, can engage the second side of the wall.

Figure 16 shows a frontal view of gripper bracket 520 comprising three arms 525 extending in a radial direction relative to the core axis of the anode mount.

Figure 17 shows a frontal view of an aperture 511 in a wall of a foundation pile, which opening is configured to cooperate with the gripper bracket 520 shown in figure 16. The aperture 511 comprises a central opening 522 and three channels 523 radially extending from a central opening 522 of the aperture 511.

Thus, the gripper bracket 520 can be positioned relative to the aperture 511 in a first position, in which position the channels 523 of the aperture 511 overlap with the arms 525 of the gripper bracket 520 and the gripper bracket can be passed through the aperture.

Furthermore, the gripper bracket 520 can be positioned relative to the aperture 511 in a second position, in which position the arms 525 of the gripper bracket overlap with sections 527 of the wall 518 that are located between the radially extending channels 523 of the aperture 511. In this second potion the gripper bracket 520, or clamping means provided on the gripper bracket, can engage the wall 518. The second position of the gripper bracket 520 enables the anode mount to be mounted in the aperture by clamping the wall between the gripper bracket 520 and the base bracket of the anode mount.

The invention can also be summarized according to one or more of the following clauses:

1. Method for mounting an ICCP anode on an offshore foundation pile for a wind turbine, for protecting the outside surface of the foundation pile, wherein the method comprises:

- using an ROV inside the foundation pile for installation of a preferably cylindrical anode through an aperture in a wall of the foundation pile; and

- mounting an anode mount on the wall of the foundation pile, the anode mount supporting the preferably cylindrical anode outside the foundation pile.

2. Method according to clause 1 , wherein the method comprises the steps:

- coupling the ROV with the anode mount, the anode mount supporting the cylindrical anode;

- lowering the ROV with the anode mount and anode inside the foundation pile, using a lifting device;

- supporting the ROV with the anode mount and anode at the aperture, using the lifting device;

- aligning the cylindrical anode with the aperture in the wall of the foundation pile, using the ROV;

- moving the anode through the aperture, using the ROV and/or the lifting device;

- mounting the anode mount to the wall of the foundation pile, preferably using the ROV, e.g. by welding, bolting, clamping, etc; and

- decoupling the ROV from the anode mount.

3. Method according to clause 1 or 2, wherein the anode mount comprises: - a core body, the core body extending along a core axis between an anode end and a base end;

- an anode seat, mounted to the core body at the anode end thereof, for supporting the anode with the anode extending in a direction parallel to the core axis;

- a base bracket, mounted to the core body, for engaging a first side of the wall of the foundation pile; and

- a gripper bracket, mounted to the core body, for engaging a second side of the wall of the foundation pile, wherein the second side of the wall is opposite the first side of the wall, and wherein the gripper bracket is located between the base bracket and the anode seat; and wherein the method further comprises the steps:

- aligning the core axis of the anode mount with the aperture, when aligning the cylindrical anode with the aperture in the wall of the foundation pile, using the ROV;

- moving the anode seat and the gripper bracket of the anode through the aperture using the ROV, when moving the anode through the aperture, preferably using the ROV;

4. Method according to clause 3, wherein the method further comprises:

- after moving the anode seat and the gripper bracket of the anode through the aperture using the ROV, rotating the gripper bracket relative to the aperture about the core axis of the anode, preferably by rotating the ROV or part of the ROV about the core axis;

- mounting the anode mount to the wall of the offshore construction by moving the gripper bracket and the base bracket and/or by moving clamping parts provided on the gripper bracket and/or base bracket towards respectively an outside surface and an inside surface of the wall of the foundation pile, to clamp the wall between the gripper bracket and the base bracket.

5. Method according to clause 4, wherein the gripper bracket is rotated relative to the aperture and relative to the base bracket about the core axis of the anode by pivoting the gripper bracket about the core axis. 6. An ICCP anode mount, configured for mounting an anode of an ICCP system on an offshore construction, e.g. a foundation pile for a wind turbine, wherein the anode mount is configured to be mounted in an aperture in a wall of the offshore construction, the anode mount comprising: a core body, the core body extending along a core axis between an anode end and a base end, an anode seat, mounted to the core body, at the anode end thereof, for supporting the anode with the anode extending in a direction parallel to the core axis, a base bracket, mounted to the core body, for engaging a first side of the wall, a gripper bracket, mounted to the core body for engaging a second side of the wall, wherein the second side of the wall is opposite the first side of the wall, wherein the base bracket and the gripper bracket extend in a direction perpendicular to the core axis and are spaced relative to each other such that the wall of the offshore foundation can be positioned between the base bracket and the gripper bracket when the core body is in the aperture of the wall, and wherein the gripper bracket and/or the base bracket are configured to be moved towards each other and/or are provided with clamping parts that are configured to be moved towards the other bracket, to engage the wall and clamp the wall between the gripper bracket and the base bracket.

7. Anode mount according to clause 6, wherein the gripper bracket is located between the base bracket and the anode seat and the anode mount is thus configured for being mounted from an inward facing side of the wall, i.e. from the side opposite the site wherein the anode will be mounted during use.

8. Anode mount according to clause 6 or clause 7, wherein the anode is a cylindrical anode, the cylindrical anode having a longitudinal core axis and a diameter perpendicular to the longitudinal core axis, and wherein the width and the length of the gripper bracket, in a direction perpendicular to the core axis, are larger than a diameter of the cylindrical anode, such that the anode can be moved through the aperture in which the anode mount is to be mounted. 9. Anode mount according to one or more of the clauses 6-8, wherein the anode mount, preferably the core body of the anode, is configured to be engaged by a lifting device, and preferably is configured to enable rotation of at least the anode seat about the core axis while the anode mount is supported by the lifting device.

10. Anode mount according to one or more of the clauses 6-9, wherein the core body comprises a channel for guiding through an anode power cable.

11. Anode mount according to one or more of the clauses 6-10, wherein the base bracket and/or the gripper bracket is/are provided with clamping parts, e.g. bolts, that can be moved relative to the bracket or brackets to engage a surface of the offshore structure, to clamp the wall between the gripper bracket and the base bracket.

12. Anode mount according to one or more of the clauses 6-11, wherein the base bracket can be moved along the core axis relative to the base bracket.

13. Anode mount according to one or more of the clauses 6-12, wherein the gripper bracket can be rotated about the core axis relative to the base bracket.

14. Anode mount according to one or more of the clauses 6-13, wherein the anode mount, preferably the base bracket of the anode mount, is configured to be engaged by an ROV.

15. Anode mount according to one or more of the clauses 6-14, wherein the gripper bracket is oval shaped.

16. ROV (remotely operated vehicle) for mounting an anode mount according to one or more of the preceding clauses into a aperture in an offshore construction, and wherein the ROV is configured to be supported by a crane while positioning the anode mount relative to the aperture.

17. ROV according to clause 16, wherein the ROV is provided with a coupling device, e.g. one or more grippers or magnets, for engaging the anode mount.

18. ROV according to clause 16 or clause 17 wherein the ROV comprises multiple thrusters, and wherein one or more of the thrusters are orientated to compensate the moment force caused by the weight of the anode and the ROV being supported by the lifting device, and to control the orientation of the anode, preferably while the ROV is supported by a lifting device. 19. ROV according to one or more of the clauses 16-18, wherein the ROV comprises multiple thrusters, and wherein one or more of the thrusters are orientated for rotating the ROV, and the anode mount and the anode, about the core axis of the anode mount, preferably while the ROV is supported by a lifting device.

20. ROV according to clause 19 wherein the ROV comprises counter ballast for compensating the weight of the anode relative to a point where the ROV is supported by the lifting device.

21. Assembly of an anode mount according to one or more of the clauses 6-15, and an anode, wherein the anode is mounted, e.g. is bolted, to the anode seat of the anode mount.

22. Assembly according to clause 21 , wherein the anode is a cylindrical anode and wherein the anode has a longitudinal core axis that is parallel, preferably coincides, with the core axis of the anode mount.

23. Assembly according to clause 21 or clause 22, wherein the assembly further comprises a ROV according to one or more of the clauses 16-20, for positioning the anode mount and preferably the anode relative to the aperture in the wall of the foundation pile.

24. Assembly according to one or more of the clauses 21-23, wherein the assembly further comprises a lifting device, the lifting device comprising a winch and an associated lifting cable, for supporting the ROV with the anode mount and the anode.