Hang-off system and method of using the same

Abstract

A hang-off system for a bend controller for an elongate element (10) extending from subsea from a body of water up to an offshore structure (20) is disclosed. The hang-off system comprises a bend controller (100) for controlling how much the elongate element (10) can bend; and a hang-off (200) for hanging off the bend controller (100) at an installed production position for the elongate element (10). The bend controller (100) is adjustably attached to the hang-off (200) by a plurality of adjustment elements (400), each adjustment element (400) being configured for at least one of: independently adjust flexibility, setting an amount of flexible (force) resistance of a movement of the bend controller (100) relative to the hang-off (200); and independently adjust and set a fixed distance between the bend controller (100) and the hang-off (200). A method of using the hang-off system is also disclosed.

Description

[0001] HANG-OFF SYSTEM AND METHOD OF USING THE SAME

[0002] Technical Field

[0003] The present disclosure relates generally to the field of offshore structures and more generally to the renewable energy industry. The technical field relates to a hang-off system at an offshore structure and a method of using the same. More specifically, the present invention relates to a hang-off system for a bend controller for an elongate element and a method to adjust compliance of a floating offshore structure having a power cable attached to the floating offshore structure.

[0004] Background

[0005] Hang-off systems for offshore operations are known from W02023 / 087089. Here a pipeline is hung off on a number of plates. A problem is the relative movement between the pipeline and the offshore structure. A power cable connected to a floating offshore gets damaged by the relative movement as the floater moves due to current, waves, wind etc. Each platform may have several power cables connected. It is a desire to provide compliance to prolong the life of the power cable. This must apply to different cables and pipelines, as well as different platforms. To make new installations and major changes after installations should be avoided.

[0006] Once a hang-off system is installed it is not possible to make any changes to alter the compliance, or it is very cumbersome and expensive. It is desirable to provide a system and method that also allows subsequent alterations, is inexpensive to manufacture, is easy to manufacture and assemble, is robust and reliable in use, and increases the fatigue life of a dynamic power cables, flexibles, or umbilical. The present disclosure is directed to overcoming one or more of the problems as set forth above.

[0007] SUMMARY

[0008] It is an objective of the present invention to provide a hang-off system for a bend controller for an elongate element extending from subsea up to an offshore structure and a method to adjust compliance of a floating offshore structure having a power cable attached to the floating offshore structure. This objective can be achieved by the features as defined in the independent claims. Further characteristics are defined by the dependent claims. According to one embodiment, a hang-off system for a bend controller for an elongate element 10 extending from subsea from a body of water up to an offshore structure 20 is disclosed. The hang-off system comprises a bend controller 100 and a hang-off 200. The bend controller 100 is for controlling how much the elongate element 10 can bend. The hang-off 200 is for hanging off the bend controller 100 at an installed production position for the elongate element 10. The bend controller 100 is adjustably attached to the hang-off 200 by a plurality of adjustment elements 400. Each adjustment element 400 is configured for at least one of: independently adjust flexibility, setting an amount of flexible resistance of a movement of the bend controller 100 relative to the hang-off 200; and independently adjust and set a fixed distance between the bend controller 100 and the hang-off 200.

[0009] The amount of flexible resistance may be set relative to the fixed distance. The hang-off 200 may be configured for hanging off the bend controller 100 and the elongate element 10. The hang-off system may further comprise a support 300 supporting the bend controller 100 at the hang-off 200. The plurality of adjustment elements 400 may be four, six, eight, ten, or twelve adjustment elements 400 spaced equidistant around the bend controller 100. The bend controller 100 may be a split bend controller 100. The plurality of adjustment elements 400 may comprise any combination of one or more of: one or more holders 405, one or more springs 410, two springs 410 having different spring forces, an elastic element, and a shear pin 430. One or more shear pins 430 may be arranged between the bend controller 100 and the hang-off 200.

[0010] At least one of the plurality of adjustment elements 400 may be configured to independently set and adjust both flexibility and fixed distance between the bend controller 100 and the hang-off 200, thereby providing the hang-off system with at least two different amounts of flexible resistance relative to the fixed distance. The offshore structure 20 may be a floater with a wind turbine; and the elongate element 10 may be a power cable.

[0011] The bend controller 100 may be elongate and may have an upper end 110 that is hung off the hang-off 200 and a free end 120 for receiving the elongate element 10 from the body of water; and the bend controller 100 may comprise at least a flexible portion which is increasingly flexible in a longitudinal direction towards the free end 120. The bend controller 100 may be one of a bellmouth, a bend stiffener, a dynamic bend limiter, a bend restrictor, and a gimbal, or any combination of these. The hang-off 200 may be attached, above or below sea level, to one of the offshore structure 20, an I- or J-tube of the offshore structure 20, and a balcony of offshore structure 20.

[0012] According to one embodiment, a method to adjust compliance of a floating offshore structure 20 having a power cable 10 attached to the floating offshore structure 20 is disclosed. The power cable 10 extends from a body of water up to the floating offshore structure 20. The method comprises: providing 510 the hang-off system according to any one of the preceding claims to the floating offshore structure 20, where the elongate element 10 is the power cable 10, and hanging off the bend controller 100 in an installed production position 150 for the elongate element 10; and adjusting 520 at least one of flexibility and distance of the plurality of flexible adjustment elements 400 a predetermined amount. The adjustment 520 of the plurality of flexible adjustment elements 400 may be made over time to adjust for environmental factors. The method may further comprise providing 530 a bend controller 100 as disclosed herein.

[0013] The hang-off system may allow the flexibility and / or the distance set by one of the flexible adjustment elements 400 to be different from the flexibility and / or the distance set by another one of the flexible adjustment elements 400. One or more of the embodiments described herein allows for a predetermined, tailored, compliance profile to be set to the hang-off system.

[0014] One or more of the embodiments described herein describes a system and method whereby compliance is provided for the bend control of an elongate element hung off an offshore platform. The hang-off system may adjust the angle of the elongate element. It can be used independently of other systems or equipment. Cost savings of being able to adjust easily may be made. The system prolongs the usable life of the elongate element.

[0015] At least one of the above embodiments provides one or more solutions to the problems and disadvantages with the background art. Other technical advantages of the present disclosure will be readily apparent to one skilled in the art from the following description and claims. Various embodiments of the present application obtain only a subset of the advantages set forth. No one advantage is critical to the embodiments. Any claimed embodiment may be technically combined with any other claimed embodiment or embodiments.

[0016] Brief Description of the Drawings The disclosure will be further described with reference to examples depicted as schematic illustrations in the accompanying figures in which:

[0017] FIG 1 is a schematic illustration of a cut view of a hang-off system according to an embodiment of the invention;

[0018] FIG 2 is a schematic illustration of a cut view of a hang-off system according to an embodiment of the invention;

[0019] FIG 3 is a schematic illustration of a cut view of a hang-off system according to an embodiment of the invention; and

[0020] FIG 4 is a schematic illustration of the method according to an embodiment of the invention.

[0021] Detailed Description

[0022] Embodiments of the present invention provide a hang-off system for a bend controller for an elongate element 10 extending from subsea up to an offshore structure, and a method of adjusting compliance of a floating offshore structure 20 having a power cable 10 attached to the floating offshore structure 20, the power cable 10 extending from the body of water up to the floating offshore structure 20. Preferably the offshore structure is a floating offshore wind structure. Figures 1 to 3 are schematic illustrations of different embodiments of a hang-off system. Figures 1 to 3 show the hang-off system in a cut view, cut along the axis of the elongate element 10 and along a diameter of the hang-off 200. In figures 1 to 3 only two adjustment elements 400 are illustrated, the other adjustment elements have not been illustrated for a better understanding. Figure 4 is a schematic illustration of a method to adjust compliance of a floating offshore structure 20. For a better understanding, the figures have not been made to scale.

[0023] A hang-off system for a bend controller for an elongate element 10 extending from subsea from a body of water up to an offshore structure 20 is illustrated in Figures 1 to 3. The offshore structure may be a fixed or floating offshore structure, for example a floating renewable energy structure. The hang-off system comprises a bend controller 100 and a hang-off 200. The bend controller 100 is for controlling how much the elongate element 10 can bend. The hang-off 200 is for hanging off the bend controller 100 at an installed production position for the elongate element 10. The bend controller 100 is adjustably attached to the hang-off 200 by a plurality of adjustment elements 400. Each adjustment element 400 is configured for at least one of: independently adjust flexibility, setting an amount of flexible resistance of a movement of the bend controller 100 relative to the hang-off 200; and independently adjust and set a fixed distance between the bend controller 100 and the hang-off 200.

[0024] The elongate element 10 may be a flexible pipeline, a cable, a Dynamic Inter Array Cable, DIAC, or an umbilical. The elongate element 10 may comprise a connector 15 for electric connections and / or for assisting with connecting the elongate element 10 to the hang-off system. The elongate element extends from the body of the water, from subsea, and comes up to the offshore structure 20. The offshore structure 20 may be a floater, a floater with a wind turbine, or any offshore structure that has a pipeline, a cable, a DIAC, or an umbilical connected to it. The bend controller 100 may be a bellmouth, a bend stiffener, a dynamic bend limiter, a bend restrictor, a gimbal, or any combination hereof. The hang-off may be attached, or attachable, to the offshore structure 20, for example permanently attached. The hang-off 200 may be shaped as a hollow cylinder, or a hollow truncated cone, with the base attached to the offshore structure 20 and the top supporting the bend controller 100. The hang-off 200 may be fixed or attached to the offshore structure, or to an I- or J-tube, or to a balcony of the offshore structure 20. The hang-off 200 may be above the sea level. The hang-off system may be configured to provide no rotation between the bend controller 100 and the hang-off 200. The bend controller 100 and the elongate element 10 may reach all the way through the hang-off 200. The bend controller 100 may be arranged at a substantial vertical position. The installed production position of the elongate element 10 should be understood as a final installed position of the elongate element 10. This is the position that the elongate element 10 has, at the offshore structure 20, while in use. The different positions that the elongate element 10 has before that, i.e. during installation of the elongate element 10 to the offshore structure 20, are not the installed production position of the elongate element 10. The installed production position often differs from the initial position during towing out of the offshore structure, or the position when the elongate element 10 is pulled in through the bend controller 100. The installed production position of the elongate element 10 is the position the elongate element 10 has after the final installation, for example when the wind turbine on the offshore structure delivers electric energy through the elongate element 10. The installed production position of the elongate element 10 is the position when the elongate element undergoes changes due to tides, wind, water current, mooring line tensions, anchor position, etc., especially as the floating offshore structure 20 changes position because of wind, waves, water current, and tides.

[0025] Each adjustment element 400 may be configured for independently adjust flexibility of a movement of the bend controller 100 relative to the hang-off 200. This may include setting a variating amount of flexible force resistance of the movement. As may be taken from figures 2 and 3, springs 410 may be used for independently adjust flexibility of the movement of the bend controller 100 relative to the hang-off 200. In figure 2 the two spring marked 410 may be equal, and / or in figure 2 the spring 410 on the right hand side may be set with a smaller spring force than the spring 410 on the left hand side. In this way the hang-off system may set a preferred, or predetermined angle of the bend controller 100. The spring force may be changed subsequently to set a different amount of flexibility, for example by changing springs. This allows each adjustment element 400 to independently adjust flexibility during the life of the elongate element 10. The flexibility of the bend controller 100 can be set at different amounts around the bend controller 100, the usable life of the elongate element 10 is increased. For example, if very rough weather is approaching the offshore structure 20, then the flexibility can be temporary increased, or decreased, all around the hang-off or only in some directions.

[0026] Each adjustment element 400 may be configured to independently adjust and set a fixed distance between the bend controller 100 and the hang-off 200. Each adjustment element 400 may set a fixed distance independently from other adjustment elements 400. The distance may for example be set with a holder 405 that engages the bend controller 100, or a support 300, directly, or via one or more springs 410. As illustrated in figures 1 and 2, the adjustment member 400 on the left hand side is set lower than the adjustment member 400 on the right hand side. This results in that the bend controller 100 becomes angled relative to the hang-off 200. By setting the distance between the bend controller 100 and the hang-off 200 around the hang-off system, the bend controller 100 may be position in an angle that prolongs the life of the elongate element 10. Since the distance can be set at different amounts around the bend controller 100, a predetermined compliance profile may be set, increasing the usable life of the elongate element 10. For example, if current changes with the seasons around the offshore structure 20, then the distance can be adjusted to angle the bend controller 100 to prolong the life of the elongate element 10 as season and / or current changes. According to one embodiment, the amount of flexible resistance may be set relative to the fixed distance. The bend controller 100 may flex relative to the hang- off 200 around the set distance between the bend controller 100 and the hang-off 200. Each adjustment element 400 may be set to a flexibility relative to the set distance and around the hang-off 200 to set a predetermined compliance profile for the hang-off system. For example, as illustrated in figure 2 the distance set by the adjustment member 400 on the left hand side is lower than the distance set by the adjustment member 400 on the right hand side. The flexibility is adjusted accordingly, such that both can flex the same amount upwards against the springs 410.

[0027] According to one embodiment, the hang-off 200 may be configured for hanging off the bend controller 100 and the elongate element 10. The hang-off 200 may support, carry, the weight of the end of the elongate element 10 and the bend controller 100. The hang-off 200 may transfer the weight of the elongate element 10 and the bend controller 100 to the offshore structure 20. The hang-off 200 may transfer the weight of the two to an I- or J-tube, or to a balcony of the offshore structure 20. This hang-off 200 may be above, or below, the sea level.

[0028] As shown in figures 1 to 3, the hang-off system may further comprise a support 300 supporting the bend controller 100 at the hang-off 200. The support 300 may be arranged between the bend controller 100 and the hang off 200. The support 300 may support the bend controller 100 from the hang off 200. For example, two expiates may form the support 300, preferably when using a split bend controller 100. As shown in figures 1 to 3, the support 300 may be directly attached to a plurality of adjustment elements 400, the hang-off 200 thereby supporting the support 300 on one side, and the other side may attach to the bend controller 100 and / or the elongate element 10. The hang-off system may lock the elongate element 10, directly or via the connector 15, manually or automatically using two C-plates. Such a locking system may be automatic, operating without manual hand operations by an operator. The hang-off system may operate with an automated locking mechanism, automated locking pins, and / or automatic connectors, especially for automated subsea operations.

[0029] According to one embodiment, the plurality of adjustment elements 400 may be four, six, eight, ten, or twelve adjustment elements 400 spaced equidistant around the bend controller 100. Only two adjustment elements 400 are illustrated in figures 1 to 3 for sake of clarity. If there would be four adjustments elements 400, then they may be arranged around the bend controller 100 every 90 degrees. If there would be six adjustments elements 400, then they may be arranged around the bend controller 100 every 60 degrees, and so on. There may be an uneven number of adjustment elements 400. There may be adjustment elements 400 spaced non- equidistant around the bend controller 100, for example to create a predetermined compliance profile for the hang-off system.

[0030] According to one embodiment, the hang-off system may allow for the flexibility and / or the distance set by one of the flexible adjustment elements 400 to be different from the flexibility and / or the distance set by another one of the flexible adjustment elements 400. Each flexible adjustment elements 400 may be independently adjusted to a predetermined amount and may be adjusted independently of any other adjustment elements 400. This may configure the hang- off system to be hang-off system with a predetermined compliance profile.

[0031] According to one embodiment, the bend controller 100 may be a split bend controller 100. The bend controller 100 may be split along a central longitudinal axis of the bend controller 100 and / or a central longitudinal axis of the elongate element 10. Such a split may allow the bend controller 100 to open up so that the elongate element 10 can be inserted sideways into the bend controller 100 and thereby be hung-off. The elongate element may be pulled up through the bend controller 100 if the bend controller is not split.

[0032] The plurality of adjustment elements 400 may comprise any combination of one or more of: one or more holders 405, one or more springs 410, two springs 410 having different spring forces, an elastic element, and a shear pin 430. As best illustrated in figures 2 and 3, each adjustment element 400 may comprise any combination of one or more of: one or more holders 405, one or more springs 410, two springs 410 having different spring forces, an elastic element, and a shear pin 430. The adjustment element 400 may comprise a hydraulic cylinder, the hydraulic cylinder by itself, or in combination with one or more springs 410. Each adjustment elements 400 may comprise, optionally in order, the holder 405, one or more springs 410, the bend controller 100 or the support 300, one or more springs 410, the holder 405. The springs 410 may be different kind of springs, for example different spring forces, and / or different sizes. An adjustment element 400 may comprise two springs with different spring forces, such that the bend controller 100 may flex first easily and subsequently flex with a greater resistance. An adjustment element 400 may comprise for example one spring and a shear pin 430, or two springs with different spring constants and a shear pin 430. The hang-off system may be configured such that when a shear pin 430 shears, then one or more springs 410 starts to dampen and allow flexibility of the bend controller 100. One or more shear pins 430 may be arranged between the bend controller 100 and the hang-off 200. The shear pin may allow the hang-off system to operate under predetermined flexibility during regular and expected conditions when the shear pin 430 is unbroken, and the shear pin 430 may work as a mechanism to prevent damage under critical conditions during storms or unexpected cases, including failure of mooring lines and extreme floater offsets when the shear pin 430 is broken. For example, the shear pin may prevent major damages to critical components that is not easily replaced. The shear pins 430 are best illustrated in figure 3. One or more of the springs 410 may be pretensioned a predetermined amount, this pretension may be subsequently adjusted to be larger or less. The subsequent adjustment after installation of the flexibility, for example by changing springs 410, and / or distance, for example with holder 405, allows the hang- off system to adjust the bend controller 100, and set a predetermined compliance profile, after it has been installed on an offshore structure 20 and adjust the bend controller 100 to any suitable angle and flexibility depending on external circumstances such as weather, wind, current, season, etc.

[0033] According to one embodiment, at least one of the plurality of adjustment elements 400 may be configured to independently set and adjust both flexibility and fixed distance between the bend controller 100 and the hang-off 200. Thereby the hang-off system is provided with at least two different amounts of flexible resistance relative to the fixed distance between the bend controller 100 and the hang-off 200. Such a setting provides the hang-off system with a non-linear, variating, amount of flexible resistance relative to the fixed distance. For example, the distance is set higher for some of the adjustment elements, as illustrated in figure 3, and these adjustment elements may comprise two springs 410 with different strength, for example on hard spring and one soft spring. This would create two different amounts of flexible resistance relative to the fixed set distance between the bend controller 100 and the hang-off 200, for example first a softer flexibility / damping and, if the elongate element 10 moves further, a harder flexibility / damping.

[0034] According to one embodiment, the offshore structure 20 may be a floater with a wind turbine. The elongate element 10 may be a power cable. The hang-off system may be suitable for this, because the floater drifts in the wind and current changing the relative position of the power cable relative to the floater. To be able to adjust the hang-off system to account for this gives the power cable a longer life.

[0035] According to one embodiment that may be combined with any embodiment disclosed herein, the bend controller 100 may be elongate and may have an upper end 110 that is hung off the hang-off 200 and a free end 120 for receiving the elongate element 10 from the body of water. The bend controller 100 may comprise at least a flexible portion which is increasingly flexible in a longitudinal direction towards the free end 120.

[0036] The bend controller 100 may be elongate and having an upper end 110 that is part of, or secured to, the hang-off system, and a free end 120 for receiving the elongate element 10 from the body of water. The bend controller 100 may have at least a flexible portion which is increasingly flexible in a longitudinal direction towards the free end 120, and the internal diameter of the flexible portion is greater at the free end 120 than at the upper end 110. The bend controller 100 may be used with or without a bend stiffener. The flexible portion may comprise a conical shape from the upper end 110 to the free end 120, for example like a bell-shaped free end 120. The bend controller 100 may comprise a flared-shaped free end 120. The bend controller 100 may comprise, in a longitudinal direction, a first solid-walled portion, and a second flexible portion. The flexible portion may comprise a series of elongate metallic strips. The bend controller 100 may comprise two or more material layers. At least one material layer may be a polymeric layer and preferably this material layer is covering the entire, or almost entire, inside of the bend controller 100.

[0037] According to one embodiment that may be combined with any embodiment disclosed herein, the bend controller 100 may be one of a bellmouth, a bend stiffener, a dynamic bend limiter, a bend restrictor, and a gimbal. According to one embodiment that may be combined with any embodiment disclosed herein, the hang-off 200 is attached, above or below sea level, to one of the offshore structure 20, an I- or J-tube of the offshore structure 20, and a balcony of offshore structure 20. The hang-off may be permanently, non-removably, attached. The bend controller 100 may comprise fastening means for attaching the elongate element 10 to the bend controller 100.

[0038] Embodiments of the hang-off system may be used above or below the sea surface. For embodiments where the hang-off system is arranged below the sea surface additional considerations regarding marine growth, debris, coating and / or painting, and corrosion of key components arise due to the environment. The hang- off system may use different combinations of materials depending on the location. For example, for subsea applications, polymers, noble materials, stainless steel, Inconel, titanium, composites, and / or coatings may be used to mitigate issues with marine growth, debris, and corrosion. Additionally, or as an alternative, a cathodic protection system may be added for corrosion protection.

[0039] According to a least one embodiment disclosed herein the hang-off system may provide an adjustable flexible hang-off system that can be adjusted to work between a very stiff condition, for example almost no flexibility, and very flexible condition, so flexible that no additional bend controller is needed. For example, using more than one size of spring may allow the hang-off system to work as very flexible under low loads, and a bit stiffer under higher loads by engaging the other size spring. For example, the hang-off system may have one predetermined flexibility inside a range limited by a shear pin and a predetermined increased flexibility after the shear pin is gone. These two examples may be combined and may provide a tailored predetermined set of different flexibility depending on the movement of the bend controller 100 in relation to the hang-off 200. Such settings would increase the life of the dynamic cable.

[0040] According to one embodiment that may be combined with any embodiment disclosed herein, any adjustments mentioned herein may be made remotely. Monitoring means and load sensors may be used for remote adjustments and assessments. Monitoring means may include means for detecting the angle of the support 300 relative the hang-off 200. Remote adjustment may be made any time and swiftly and frequently to adjust the hang-off system for environmental changes. The remote adjustment may be made onshore. Such remote adjustments would increase the life of the elongate element 10.

[0041] According to one embodiment, a method to adjust compliance of a floating offshore structure 20 having a power cable 10 attached to the floating offshore structure 20 is disclosed. The power cable 10 extends from the body of water up to the floating offshore structure 20. The method comprises: providing 510 the hang-off system according to any one of the embodiment disclosed herein to the floating offshore structure 20, where the elongate element 10 is the power cable 10, and hanging off the bend controller 100 in an installed production position 150 for the elongate element 10; and adjusting 520 at least one of flexibility and distance of the plurality of flexible adjustment elements 400 a predetermined amount. The installed for production position for the power cable 10 should be understood as a final installed position of the elongate element 10, as explained earlier herein. The adjustments 520 of the plurality of flexible adjustment elements 400 may be made over time to adjust for environmental factors, such as for example wind, tide, season, depth, weather, etc. The adjustments 520 of the plurality of flexible adjustment elements 400 may be predetermined and / or may be set according to predicted and / or sensed environmental factor, such as for example weather forecast, data from weather stations, and data from sensors for air pressure, humidity, wind direction, wind speed, and / or temperature. Each of the flexible adjustment element 400 may be set to a predefined fixed distance between the bend controller 100 and the hang-off 200. Each of the flexible adjustment element 400 may be set to a predefined fixed flexibility between the bend controller 100 and the hang-off 200.

[0042] According to one embodiment, the method may further comprise providing 530 a bend controller 100 being elongate and having an upper end 110 that is hung off at the hang-off 200 and a free end 120 for receiving the elongate element 10 from the body of water. The bend controller 100 may comprise at least a flexible portion which is increasingly flexible in a longitudinal direction towards the free end 120. The bend controller 100 and the flexibility of the bend controller 100 may be as described above.

[0043] The hang-off system and method provide a plurality of adjustment elements 400, each adjustment element 400 being configured for, one or both of, independently adjust flexibility, and independently set a fixed distance, between the bend controller 100 and the hang-off 200. This allows an angle and flexibility of a hung off bend controller 100 to be easily adjusted after the final production installation. At least one of the embodiments allows for creating a predetermined compliance profile for the hang-off system. At least one of the embodiments prolongs the usable life of the elongate element 10.

[0044] It will be apparent to those skilled in the art that various modifications and variations can be made to the system and method. With one or more of the embodiments described herein the usable life of the elongate element 10, such as a power cable, is prolonged. Other embodiments will be apparent to those skilled in the art from consideration of the specification and practice of the disclosed system and method. It is intended that the specification and examples be considered as exemplary only, with a true scope being indicated by the following claims and their equivalents.

Claims

Claims1 A hang-off system for a bend controller for an elongate element (10) extending from subsea from a body of water up to an offshore structure (20), the hang-off system comprising a bend controller (100) for controlling how much the elongate element (10) can bend; a hang-off (200) for hanging off the bend controller (100) at an installed production position for the elongate element (10); and wherein the bend controller (100) is adjustably attached to the hang-off (200) by a plurality of adjustment elements (400), each adjustment element (400) being configured for at least one of: independently adjust flexibility, setting an amount of flexible resistance of a movement of the bend controller (100) relative to the hang-off (200); and independently adjust and set a fixed distance between the bend controller (100) and the hang-off (200).2 The hang-off system according to claim 1, wherein the amount of flexible resistance is set relative to the fixed distance.3 The hang-off system according to claim 1 or 2, wherein the hang-off (200) is configured for hanging off the bend controller (100) and the elongate element (10).4 The hang-off system according to any one of the preceding claims, further comprising a support (300) supporting the bend controller (100) at the hang-off (200).5 The hang-off system according to any one of the preceding claims, wherein the plurality of adjustment elements (400) are four, six, eight, ten, or twelve adjustment elements (400) spaced equidistant around the bend controller (100).6 The hang-off system according to any one of the preceding claims, wherein the bend controller (100) is a split bend controller (100).7 The hang-off system according to any one of the preceding claims, wherein the plurality of adjustment elements (400) comprises any combination of one or more of: one or more holders (405), one or more springs (410), two springs (410) having different spring forces, an elastic element, and a shear pin (430).8 The hang-off system according to any one of the preceding claims 1 to 6, wherein one or more shear pins (430) are arranged between the bend controller (100) and the hang-off (200).9 The hang-off system according to any one of the preceding claims, wherein at least one of the plurality of adjustment elements (400) is configured to independently set and adjust both flexibility and fixed distance between the bend controller (100) and the hang-off (200), thereby providing the hang-off system with at least two different amounts of flexible resistance relative to the fixed distance.10 The hang-off system according to any one of the preceding claims, wherein the offshore structure (20) is a floater with a wind turbine; and wherein the elongate element (10) is a power cable.11 The hang-off system according to any one of the preceding claims, wherein the bend controller (100) is elongate and having an upper end (110) that is hung off the hang-off (200) and a free end (120) for receiving the elongate element (10) from the body of water; and the bend controller (100) comprising at least a flexible portion which is increasingly flexible in a longitudinal direction towards the free end (120).12 The hang-off system according to any one of the preceding claims, wherein the bend controller (100) is one of a bellmouth, a bend stiffener, a dynamic bend limiter, a bend restrictor, and a gimbal; and / or wherein the hang-off (200) is attached, above or below sea level, to one of the offshore structure (20), an I- or J-tube of the offshore structure (20), and a balcony of offshore structure (20).13 Method to adjust compliance of a floating offshore structure (20) having a power cable (10) attached to the floating offshore structure (20), the power cable (10) extending from a body of water up to the floating offshore structure (20), the method comprises:providing (510) the hang-off system according to any one of the preceding claims to the floating offshore structure (20), where the elongate element (10) is the power cable (10), and hanging off the bend controller (100) in an installed production position (150) for the elongate element (10); and adjusting (520) at least one of flexibility and distance of the plurality of flexible adjustment elements (400) a predetermined amount.14 The method according to claim 13, wherein the adjustment (520) of the plurality of flexible adjustment elements (400) is made over time to adjust for environmental factors.15 The method according to claim 13 or 14, wherein the method further comprises providing (530) a bend controller (100) according to claim 11.

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