Improvements in and relating to the assembly of structures

Abstract

An apparatus for assembling a structure, such as a wind turbine or jacket, is disclosed. The apparatus comprises a first erectable structure comprising a first plurality of legs connected by a first connection arrangement. The apparatus comprises a second erectable structure comprising a second plurality of legs connected by a second connection arrangement. The apparatus comprises an elongated structure extending between the first and second erectable structures. The apparatus comprises a lifting arrangement configurable to move a load along the elongated structure between the first and second erectable structures. Methods of deploying the apparatus for assembling a structure and methods of assembling a structure are also disclosed.

Description

[Technical field]

[0001] The present invention relates to a device / apparatus and / or a system for assembling an (offshore) structure or a structure such as an (offshore) structure or an (offshore) wind turbine or an (offshore) jacket. The present invention also relates to a method for deploying a device / apparatus or a system for assembling an (offshore) structure such as an (offshore) structure or an (offshore) wind turbine or an (offshore) jacket. The present invention also relates to a method for assembling a structure or an (offshore) turbine or a jacket such as a wind turbine or a jacket, e.g. an offshore wind turbine or an offshore jacket. The structure is advantageously a floating / buoyant structure and / or is provided on a floating / buoyant body.

[0002] In particular, although not exclusively, the invention relates to a method for assembling a wind turbine structure or jacket, for example intended for offshore use, and to an apparatus for assembling a wind turbine or jacket. [Background technology]

[0003] In the field of wind turbines, particularly offshore wind turbines, there is a general trend to install increasingly higher power wind turbines, for example turbines capable of outputting 10 megawatts or more. However, along with the increase in power capability, the physical dimensions of such wind turbines are also increasing.

[0004] Historically, wind turbines, or at least assembled or semi-assembled components of wind turbines, may have been manufactured and / or assembled at a first location and then transported by road to a further location for deployment and / or further assembly. However, due to their increasing physical size, transporting modern turbines, or assembled portions of modern turbines, by road is no longer practically possible.

[0005] Currently, wind turbines and their associated structures may be constructed separately on land and transported in sections to an offshore site, where they may be moved into position and secured using slings and cranes.

[0006] This background helps set the scene so that the experienced reader can better understand the discussion that follows. Therefore, none of the above discussion should necessarily be interpreted as an admission that the discussion is part of the state of the art or is common general knowledge.

[0007] Further background material includes GB 2479232 (W3G SHIPPING LTD), which describes a transport element, such as a structure, such as a wind turbine structure for an offshore installation, including an annular projection configured to complementarily mate with an engagement portion of a clamp, which allows the structure to be transported using the clamp. The clamp may include two or more portions positioned around the structure. The wind turbine may be transported as a completed structure. Typically, the transport element is provided at an attachment area, such as a tower, where the tower is attached to a support such as a jacket. Apparatus for enabling the transport of a wind turbine structure including a clamp is also described. In some cases, the apparatus is also configured to modify the effective centre of gravity of the associated structure and / or the effective centre of inertia of the associated structure. An orienting assembly may be provided comprising six actuators controlled by use of a positioning signal to enable relative movement of the clamp, and therefore the clamp structure, with respect to a lifting device. A crane may transport the wind turbine to and from a barge.

[0008] GB 2479232 (W3G SHIPPING LTD) discloses a system, such as an offshore system, comprising a wind turbine structure for a site, such as an offshore site, the structure comprising a tower for supporting a turbine and a transport element, the transport element being provided at a base of the tower and being part of a complementary mating arrangement, the transport element being mateable with an engaging element of a clamp, and an apparatus for enabling transport of the structure, the apparatus comprising a clamp having an engaging element, the engaging element being another part of the complementary mating arrangement, the engaging element being mateable with the transport element of the tower, the apparatus being configured to enable raising and lowering the structure at the site from the base of the tower using the clamp when the engaging element of the clamp mates with the transport element of the tower.

[0009] GB 2582844 (W3G MARINE LTD) discloses a method of assembling a structure such as a wind turbine, the method comprising: To provide a lifting arrangement, the lifting arrangement comprising: a gantry disposed on and / or directly above the one or more rails; a lifting means coupled to the gantry; Providing and providing Stacking parts of a structure, a first portion of the structure relative to the one or more rails; Lifting the first portion using a lifting means; Configuring a clamping device to grasp the first portion; conveying the clamping device along one or more rails; and disposing the device in a transportable manner by the above-mentioned method. lifting a second portion of the structure using a lifting means; disposing the first portion under the second portion by further conveying the first portion gripped by the clamping device along one or more rails; lowering the second portion onto the first portion; By stacking Includes.

[0010] China Utility Model No. 213445838 (NANTONG RUNJINI MARINE EQUIPMENT CO,LTD) describes an offshore wind turbine blade wave compensation platform including two tracks, fixedly connected to a portal between respective sides of the tracks, and equally fixedly connected to a servo motor all around the inner bottom of the portal.

[0011] EP 2058444 (FREYSSINET) describes a method for constructing civil engineering structures and associated systems. The method comprises positioning a second element under a fixed gantry crane with a lifting unit, e.g. a crane hook. The element is lifted using the lifting unit. The first element is positioned under the fixed crane and under the second element. The second element is placed on the first element using the lifting unit. The fixed crane is arranged on or near a building bench on which the civil structure is built. Independent claims are also included for a system for constructing civil structures with a fixed lifting structure.

[0012] One or more aspects / embodiments of the present invention may or may not address one or more of the background problems. [Prior art documents] [Patent documents]

[0013] [Patent Document 1] British Patent No. 2479232 [Patent Document 2] British Patent No. 2582844 [Patent Document 3] China Utility Model No. 213445838 [Patent Document 4] European Patent Application Publication No. 2058444 Summary of the Invention [Problem to be solved by the invention]

[0014] It is an aim of at least one embodiment of at least one aspect of the present invention to avoid or at least alleviate at least one problem in the prior art.

[0015] It is an object of at least one embodiment of at least one aspect of the present invention to provide a technically simpler and / or commercially more cost-effective method and system for assembling, for example, an (offshore) wind turbine structure or an (offshore) jacket for an (offshore) wind turbine, than the prior art. [Means for solving the problem]

[0016] According to the present invention there is provided a device or apparatus and system for assembling an (offshore) structure (such as a wind turbine or wind turbine generator (WTG)), a method for deploying a device or apparatus for assembling an (offshore) structure and a method for assembling an (offshore) structure in accordance with the accompanying claims.

[0017] According to a first aspect of the present disclosure, there is provided a device or apparatus for assembling a structure (such as an offshore structure, such as a wind turbine or jacket), the apparatus comprising a (standable, e.g. vertically standable) structure and a lifting arrangement.

[0018] The structure may be capable of being erected or assembled on-site, for example, and / or may be capable of being dismantled or disassembled on-site, for example.

[0019] The device / apparatus may comprise or provide an assembly area, for example above the bottom or floor of an area of ​​water, for example a body of water, for example a seabed. The assembly area may be provided below the lifting arrangement, for example when erected. It will be appreciated that the device / apparatus may be used offshore or on land, for example on or at a wharf.

[0020] The assembly area may be provided within a periphery, area or volume of the device or apparatus. The lifting arrangement may be provided above, for example directly above, the assembly area.

[0021] In one embodiment, the (erectable) structure may be disposable in a first, or folded state. The (erectable) structure may be disposable in a second, extended, or erected state. The (erectable) structure may be extendable or selectively movable from a first state to a second state. The (erectable) structure may be collapsible or further selectively movable from a second state to a first state. This selective disposition may facilitate the (erectable) structure being transported in a folded state to a location for assembling the (offshore) structure and then being extended and erected at that location. Furthermore, this selective disposition may facilitate the (erectable) structure being folded and / or removed from the assembly area after the (offshore) structure is assembled.

[0022] In another embodiment, the structure may be capable of being assembled and / or erected on site or in situ, which facilitates portions of the structure being transported to the site individually, or at least unassembled for assembly on or at the site.

[0023] The structure may include a number of legs and / or a top member. The legs may be connected or connectable to the top member.

[0024] The lifting arrangement may be provided below, for example directly below, the top member in use. The lifting arrangement may depend from the top. An assembly area may be provided below, for example directly below, the top.

[0025] In a preferred embodiment, the device or apparatus may comprise a tripod body or tripod arrangement, or may comprise three legs. The tripod body may comprise three legs. Alternatively, the device or apparatus may comprise a tetrapod body.

[0026] Each of the legs may be attached at a first end to a connecting member, for example hinged. The connecting member may comprise the top of the structure / tripod / tetrapod. The lifting arrangement may be attached to and / or depend (vertically downwards) from the connecting member or the top. In this way, the lifting arrangement may be provided between the three legs.

[0027] Each leg may be provided with a mud mat at a second end, and each mud mat may be selectively buoyant (for transport) or submersible (for standing).

[0028] In some embodiments, for example in the case of a tetrapod, one pair of opposing legs may be the same length, and the length may be different from another pair of opposing legs.

[0029] The structure may comprise a pyramidal shape when erected, for example a pyramid having a polyhedral base, a triangular base, a square base or a rectangular base. The structure may comprise a tetrahedron when erected.

[0030] The lifting arrangement may comprise an arrangement for connecting or supporting a portion of the structure to be lifted. The arrangement may comprise one or more hooks, shackles, etc. The lifting arrangement may comprise a single point lifting arrangement, with a single lifting point for supporting a load, for example a part or component of a structure.

[0031] The lifting arrangement may comprise one or more pulley arrangements and / or winches.

[0032] One or more lines (control / tethering / tagging lines) may be provided between at least one, and preferably each, of the legs, the lines adapted to be connected to a load (e.g. part of a structure) to be lifted by the lifting arrangement. At the intersection of the lines, e.g. below the top member, a connection piece may be provided.

[0033] One or more of the legs of the device or apparatus may comprise a (metal) grid arrangement.

[0034] Additional lines or cables may be provided between adjacent legs at or near the ends of the distal legs of the top member.

[0035] Another further line may be provided at or near the end of each leg, which further lines extend (horizontally) to meet at the (base) centre point of the device, for example below the top member.

[0036] In modified embodiments, the device / apparatus may be provided with a support member on at least one, or each, leg. The / each support member may be provided at or near a respective end of one of the legs distal from the apex. The / each support member may be deployed in a substantially vertical arrangement in use. The support member may provide support / strength to the respective leg to attempt to avoid buckling of the legs.

[0037] According to a second aspect of the present disclosure, there is provided a system for assembling a structure (such as an offshore structure, such as a wind turbine or jacket), the system comprising a device according to the first aspect of the present disclosure.

[0038] The system may include a floating or buoyant body for transporting one or more portions of the structure to an assembly area.

[0039] The system may, for example, comprise one or more winches for controlling the lifting arrangement.

[0040] The one or more winches may be provided on the further buoyant or floatable body. The further buoyant or floatable body may be adapted to be fastened to a leg of the device or apparatus. For example, the further buoyant or floatable body may comprise a slot or recess for engaging with the leg of the device or apparatus and / or for receiving a connecting member during transport of the device / apparatus when in the folded state.

[0041] According to a third aspect of the present disclosure, there is provided a method of deploying a device or apparatus for assembling a structure, such as a wind turbine, such as a (floating / buoyant) offshore structure, wind turbine or jacket, the method comprising: Providing a device or apparatus according to the first aspect of the disclosure at or to an assembly area or location; Deploying / setting up a device or equipment Includes.

[0042] Preferably, the assembly site is an area of ​​water, for example the bottom or floor of a body of water, for example an area above the ocean floor.

[0043] The device / apparatus, when erected, may stand / rest on the bottom of the body of water, for example the ocean bottom. The top and elevation arrangement may be provided above the surface level of the body of water.

[0044] Providing the device or apparatus to the assembly site may include, for example, the use of one or more ships or barges to transport the device or apparatus, or one or more parts / components thereof, together or individually.

[0045] According to a fourth aspect of the present disclosure, there is provided a method of assembling an offshore structure, a wind turbine or a structure such as a jacket or a wind turbine, the method comprising: Deploying a device or apparatus according to the method according to the third aspect of the present disclosure; Transporting a first portion of the structure to an assembly area; Lifting the first portion using a lifting arrangement; transporting the floating / buoyant base or foundation body to an assembly area; connecting / clamping a first portion of the structure to a floating / buoyant base; Includes.

[0046] The method comprises the following subsequent steps: transporting a further portion of the structure to an assembly area; lifting the further portion using the lifting arrangement; and transporting the floating / buoyant base to an assembly area; Lowering and / or connecting a further portion of the structure to a first / one portion of the structure already provided on a floating / buoyant base; may include:

[0047] The structure may be a floating structure.

[0048] The structures are: A plurality of parts or components; A segmented (offshore) structure; Floating / buoyant foundations; Monopile and jackets, for example tripod jackets, four-legged jackets or twisted jackets; It may comprise or include.

[0049] In the case of a structure comprising a wind turbine, the parts or components are: a column or tower, e.g., a first and a second column section; Nasser and Multiple turbine blades, e.g. three turbine blades and may comprise one or more of:

[0050] In such a case, there may be a given number of parts, say six parts, and therefore there may be a demand for the same given number of lifts, say six lifts.

[0051] The method may include providing a tower for supporting (part of) the structure during assembly.

[0052] Arrangements may be provided for extending or increasing the height of the tower during use, for example at intervals, to raise the structure and / or the top of the structure.

[0053] According to a fifth aspect of the present disclosure, there is provided a method for assembling an (offshore) structure, such as an (offshore) wind turbine or an (offshore) jacket, the method comprising the following steps: To provide a lifting arrangement, the lifting arrangement comprising: a gantry disposed above and / or directly above the area of ​​water; a lifting means or device coupled to the gantry; Providing and providing Stacking parts of a structure, transportably disposing a first portion of a structure against or in an area of ​​water; Lifting the first portion using a lifting means; Configuring a clamping or holding device to grasp the first portion; transporting the clamping or holding device away from the area of ​​water; lifting a second portion of the structure using a lifting means; disposing the first portion below or adjacent to the second portion by further conveying the first portion gripped by the clamping device into the area of ​​water; lowering the second portion onto or in connection with the first portion; By stacking Includes.

[0054] The step of lifting the second portion using a lifting means or device may include hoisting and / or raising the second portion upwardly to a height above a top level of the first portion.

[0055] The method may include fixedly coupling the second portion to the first portion by bolting, welding, and / or clamping.

[0056] The structure may be, for example, a wind turbine assembly, such as an offshore wind turbine, or a jacket, such as an offshore jacket, for supporting a wind turbine.

[0057] The first portion and / or the second portion and / or the one or more further portions may be at least one of a part of a tower or a nacelle or a turbine blade.

[0058] The method comprises depositing one / further portion on the second portion, lifting the further portion using a lifting means or device; disposing a second portion of the structure beneath the further portion by conveying the second portion to an area of ​​water; lowering the further portion onto or relative to the second portion; The method may further include stacking the components by

[0059] The clamping device may be provided on a floating or buoyant body, for example a buoyant base or a (top) crown assembly.

[0060] The clamping device may be configured to support and / or clamp and / or grip at least a portion of the structure in a vertical arrangement and / or in a substantially upright configuration.

[0061] According to a sixth aspect of the present disclosure, there is provided a system for assembling a structure such as an (offshore) wind turbine or an (offshore) jacket, the system comprising: a gantry disposed above and / or directly above the area of ​​water; a lifting means or arrangement coupled to the gantry; A means or device for transporting a portion of the structure to and from an area of ​​water; Equipped with The means or device for transporting the part of the structure comprises a clamping device or a holding device.

[0062] The clamping or holding device may be configurable between a clamping or holding configuration for gripping a portion of a structure and a non-clamping or non-holding configuration.

[0063] The clamping device may be coupled to or mounted to a floating or buoyant (base) body, for example a floating foundation or a (top) crown assembly or a barge.

[0064] The lifting means may comprise a winch and / or a pulley.

[0065] The system may be adapted to assemble an offshore wind turbine assembly or a wind turbine assembly or jacket, such as an offshore jacket assembly, for example for a wind turbine.

[0066] The system may include a clamping and / or gripping system, the clamping and / or gripping system comprising: a clamping device for gripping at least a portion of the wind turbine assembly; A floating or buoyant body; Equipped with The clamping device is mounted to a floating or buoyant body.

[0067] The clamping device may be configured to support at least a portion of the wind turbine assembly or the jacket assembly in a vertical arrangement and / or in a substantially upright configuration.

[0068] The clamping device may be configured to engage a flange or rim disposed on an outer surface of a portion of the structure. According to a seventh aspect of the present disclosure, there is provided a device or apparatus for assembling a structure (such as a wind turbine or jacket, such as an offshore structure, a wind turbine or jacket), the device or apparatus comprising an erectable, e.g. vertically erectable, structure. The device or apparatus may comprise a lifting arrangement. A method for erecting the erectable structure and a system comprising the erectable structure are also disclosed.

[0069] The erectable structure may comprise a multi-legged structure, such as a tripod or a tetrapod.

[0070] In one embodiment, the erectable structure may be disposable in a first, or folded state. The erectable structure may be disposable in a second, extended, or erected state. The erectable structure may be extendable or selectively movable from a first state to a second state. The erectable structure may be collapsible or may further be selectively movable from a second state to a first state. This selective disposition may facilitate the erectable structure being transported in a folded state to a location for assembling the (offshore) structure and then extended and erected at that location. Furthermore, this selective disposition may facilitate the erectable structure being folded and / or removed from the assembly area after the (offshore) structure is assembled.

[0071] In examples, erection of the erectable structure may be assisted by a post or column, which may be mounted to the floating structure, or which may extend through a central portion of the erectable structure.

[0072] During the process of erecting the erectable structure, a central portion of the erectable structure may be raised relative to the post or column, eg "walked" up it.

[0073] The central portion may comprise or be coupled to a running gear module.

[0074] Such raising of the central portion of the erectable structure may involve the use of one or more clamps, such as walking clamps.

[0075] In some examples, while the central portion of the erectable structure is being raised, a traction force may be applied to a tension member, e.g., a line, between the center of the leg of the erectable structure and the base (or generally toward the base).

[0076] In some examples, a traction force may be applied to a tension member, such as a line, between the bases of the legs of the erectable structure while a central portion of the erectable structure is being raised.

[0077] The posts may be first placed on the floating structure with the top of the erectable structure resting around the posts or columns.

[0078] In examples, the erectable structures and / or posts or columns may initially be provided as parts which may be assembled on the deck, eg joined together.

[0079] In examples, the erectable structures may be installed in pieces that are joined together on a deck and / or lowered onto the tops of and / or assembled around posts or columns.

[0080] In some examples, the floatable structure, or at least a portion thereof, may be lowered and / or extended to the seabed to provide a reaction to lift the erectable structure into position.

[0081] In some examples, the buoyant structure may float during erection of the erectable structure, provided, for example, that it has sufficient buoyancy and stability capacity to react to loads.

[0082] In some embodiments, the post or column may have one or more winches mounted on the top or uppermost portion, for example a linear winch.

[0083] The one or more winches may be configured to lift the top or uppermost portion of the erectable structure.

[0084] In an embodiment, the post or column may be provided with one or more return sheaves with winches at, on or generally near a deck, for example the deck of a floatable structure.

[0085] The post or column may be a primary post or column and may comprise at least one further post or column disposed inwardly of the primary post or column. The primary post or column and the at least one further post or column may be arranged in a telescoping arrangement.

[0086] During assembly of the standable structure, once the top or uppermost portion of the standable structure has been raised to reach the top or uppermost portion of a post or column, at least one further post or column may be extended, e.g. telescopic, to continue the process of raising the top or uppermost portion of the standable structure.

[0087] In some examples, the erectable structure may be erected without lifting machinery in place, such as lifting machinery that may be required to assemble a structure such as a wind turbine or jacket or offshore structure, an offshore wind turbine or an offshore jacket.

[0088] In such an example, the lifting machine may be lifted into position, for example on top of the erectable structure, following erection of the erectable structure.

[0089] In some examples, an erectable structure may have some of its structural components lifted into place following initial erection of the structure, and in one example, such structural components may also form part of a platform for a lifting machine.

[0090] In an example use, the lifting machine may be configured to be lowered and / or removed for purposes such as servicing, maintenance, repair, storage, etc.

[0091] In some examples, windage of the erectable structure may be reduced by removing at least a portion of the erectable structure, particularly the upper portion of the erectable structure. As an example, a roof or safety area for personnel that may only be needed during operation may be removed to reduce windage.

[0092] In some examples, to reduce the tendency for the erectable structure to buckle, one or more parts or components of the erectable structure may be used to increase the stiffness of the erectable structure, which are lifted after the initial erection of the erectable structure.

[0093] In some instances, such as when the erectable structure comprises a tripod, a mud mat barge may be provided at the base of each leg. Such barges may have buoyancy that may extend from their deck, and when on the seabed, their top or uppermost portions may be substantially at or above the waterline. Advantageously, this may help sink the mud mat barge in place.

[0094] In some examples, the mud mat barges may be ballasted to provide lateral stability from forces such as wind and / or tidal forces during their operation. In some examples, such ballasting may be achieved by at least one of: gravity anchors, such as mud or hematite, sheet piles around the mud mat barge, pile anchors, suction anchors, anchors attached by chains, pumping water or other dense material to provide wires or ropes, and / or tack lines to shore.

[0095] According to an eighth aspect of the present disclosure, there is provided a system for assembling a structure (such as an offshore structure, such as a wind turbine or jacket), the system comprising a device or apparatus according to the seventh aspect of the present disclosure.

[0096] According to a ninth aspect of the present disclosure, there is provided an apparatus for assembling a structure, such as a wind turbine or jacket. The apparatus comprises a first structure, e.g., an erectable structure, comprising a first plurality of legs connected by a first connection arrangement. The apparatus comprises a second structure, e.g., a second erectable structure, comprising a second plurality of legs connected by a second connection arrangement. The apparatus comprises an elongated structure extending between the first and second erectable structures. The apparatus comprises a lifting arrangement configurable to move a load along the elongated structure between the first and second erectable structures.

[0097] Advantageously, providing a first erectable structure and a second erectable structure together with a lifting arrangement configurable to move a load along the elongated structure between the first and second erectable structures allows a structure, such as a wind turbine, to be assembled without having to repeatedly move any base or foundation on which the structure may be assembled. That is, in use, components of the structure may be provided under the first structure and then lifted by the lifting arrangement to an assembly site under the second structure. Reduction in the movement of any base or foundation on which the structure may be assembled may advantageously reduce operating costs, shorten assembly times, reduce the complexity of the assembly operation, and / or reduce risks to personnel.

[0098] The first and / or second erectable structures may be disposable in a first or folded or stowed state and a second or extended state. The first and / or second erectable structures may be extensibly erectable or selectively movable from a first state to a second state. The first and / or second erectable structures may be foldable or stowable or further selectively movable from a second state to the first state.

[0099] Advantageously, the first and / or second erectable structures may be transported to an assembly site in the first, or folded, or stowed state, which may advantageously reduce transportation costs and increase the range of locations where the disclosed apparatus may be used.

[0100] As described in more detail below, the apparatus may, when erected, define and / or comprise an assembly area below the lifting arrangement, e.g. above the area of ​​water, e.g. the bottom or floor of a body of water, e.g. the ocean floor. The assembly area may, e.g., be provided below, e.g. directly below, the lifting arrangement, when erected. The assembly area may be provided within a perimeter, area or volume of the device or apparatus. The lifting arrangement may be provided above, e.g. directly above, the assembly area.

[0101] The first connection arrangement may comprise a first top member substantially defining a first top of the first plurality of legs.

[0102] That is, the first plurality of legs may be arranged to meet or substantially meet at a point defined by the first connection arrangement. Thus, in some embodiments, the first plurality of legs may define a substantially pyramidal structure together with the first connection arrangement, with the first connection arrangement defining an apex of the substantially pyramidal structure. The first connection arrangement may comprise a plurality of components, such as struts, trusses and / or couplings.

[0103] The second connection arrangement may include a second top member substantially defining a second top of the second plurality of legs.

[0104] For example, in some embodiments, the legs of the second plurality may also form or meet at an apex. As described in more detail below, in some embodiments, the legs of the second plurality may form a pair of sheer legs or A-frames together with the second apex member.

[0105] The elongated structures may extend beneath the first apex and / or the second apex.

[0106] Advantageously, by extending directly beneath the first apex and / or second apex, the first and second erectable structures may provide a maximum amount of structural support to the elongated structure, thereby ensuring that a sufficiently heavy load can be lifted by the lifting arrangement without damaging or unduly distorting the first and second erectable structures.

[0107] The first erectable structure may comprise a tripod or tripod arrangement. The first plurality of legs may have exactly three legs.

[0108] In some examples, the first erectable structure may substantially correspond to the (erectable, eg vertically erectable) structure of the first embodiment.

[0109] The first erectable structure may comprise a tetrapod or arrangement. The first plurality of legs may have exactly four legs.

[0110] That is, in some embodiments the first erectable structure may be formed from, for example, one or more gantry cranes or the like.

[0111] The second erectable structure may comprise a tripod or tripod arrangement. The second plurality of legs may have exactly three legs.

[0112] In some examples, both the first and second erectable structures may each include a tripod arrangement.

[0113] The second erectable structure may comprise a pair of shear legs.The second erectable structure may comprise a pair of shear legs or an A-frame arrangement.The second plurality of legs may have exactly two legs.

[0114] Advantageously, the A-frame or a pair of sheer legs provides an easily installable and foldable support structure requiring only two legs, thereby reducing cost, complexity and installation time relative to a tripod arrangement.

[0115] In certain embodiments, the first standable structure may be implemented as a tripod arrangement having three legs and the second standable structure may be implemented as a pair of sheer legs or an A-frame arrangement.

[0116] Each leg of the first plurality of legs may be attached at, or substantially at, a respective first end to the first connection arrangement.

[0117] Each leg of the second plurality of legs may be attached at, or substantially at, a respective first end to the second connection arrangement.

[0118] The first and / or second connection arrangements may each comprise one or more components, for example the first and / or second connection arrangements may each comprise a truss, strut, etc. and may be coupled to the legs by a coupling such as a pin, bolt, etc.

[0119] Each leg of the first and second pluralities of legs may be provided with a mud mat at a respective second end. Optionally, the / each mud mat may be selectively buoyant or submersible.

[0120] In some exemplary embodiments, the mud mat may be shared between at least one leg of the first plurality of legs and at least one leg of the second plurality of legs.

[0121] Each leg of the second plurality of legs may be hingedly coupled at a second end to a respective mud mat.

[0122] That is, each leg of the second plurality of legs may be configured or configurable to pivot at the second end relative to a respective mud mat.

[0123] The elongated structure may comprise a beam or truss. Optionally, the elongated structure may comprise a rail, channel or guide along which at least a portion of the lifting arrangement may be configured to move or be conveyed.

[0124] A cantilevered portion of the elongated structure may extend from the second erectable structure in a direction away from the first extendable structure.

[0125] In one example use, the cantilevered portion may be used to mount a blade on a wind turbine structure.

[0126] Optionally, the cantilevered portion may be a tapered portion.

[0127] In one example, the cantilevered portion may be tapered because the cantilevered portion has a smaller weight support requirement than the main portion of the elongated structure. In a non-limiting example, the main portion of the elongated structure may be configured, e.g., with suitable dimensions and structural integrity, to support a weight in the region of 1200 tons, which may be sufficient to lift a portion of a tower structure and / or a nacelle of a wind turbine. In such a non-limiting example, the tapered cantilevered portion of the elongated structure may be configured, e.g., with suitable dimensions and structural integrity, to support a weight in the region of 200 tons, which may be sufficient to lift a blade of a wind turbine structure.

[0128] Advantageously, tapered sections require less material than non-tapered sections and incur less associated weight and manufacturing costs.

[0129] The lifting arrangement may comprise an arrangement for connecting or supporting parts of a structure to be assembled.

[0130] For example, the lifting arrangement may comprise at least one of a pulley, a winch, a line, a hook, etc. The lifting arrangement may comprise devices such as lifting clamps, gripping devices, support platforms, cages, etc. for supporting and / or holding and / or clamping a component lifted by the lifting arrangement.

[0131] The lifting arrangement may comprise one or more hooks or shackles.

[0132] The lifting arrangement may comprise a single point lifting arrangement.

[0133] The lifting arrangement may comprise one or more pulley and / or winch arrangements.

[0134] At least one, or each, leg of the first plurality of legs and / or the second plurality of legs may comprise a lattice or truss arrangement.

[0135] Each leg of the first and / or second plurality of legs may be configured to be extendable.

[0136] Optionally, each leg of the first and / or second plurality of legs may be configured to be extended by insertion of an extension portion into the respective leg.

[0137] In some examples, the extension of one or more legs may be accomplished without substantially collapsing or substantially disassembling either the first or second structures. For example, the extension of the legs may be accomplished by insertion of an extension portion that supports the legs, lengthens the legs, such as by providing a gap or space between portions of the legs, and may comprise at least one beam, truss, strut, etc.

[0138] According to a tenth aspect of the present disclosure there is provided a system for assembling a structure such as a wind turbine or jacket comprising an apparatus according to the ninth aspect.

[0139] The system may comprise a first body for transporting one or more portions of the structure to an assembly area provided below at least a portion of the lifting arrangement. The first body may be a floatable or buoyant body. Optionally, the system may comprise a first stabilizing arrangement for stabilizing the first body against a bottom or floor of the body of water below the lifting arrangement.

[0140] The first body may comprise, for example, a barge, a watercraft, or the like.

[0141] The system may comprise a second body for assembling the structure. Optionally, the system may comprise a second stabilizing arrangement for stabilizing the second body against a bottom or floor of the body of water below the lifting arrangement. Optionally, the second body may be a buoyant or floatable body.

[0142] The second body may comprise, for example, a barge, a ship, or the like.

[0143] Advantageously, by stabilizing the second body, the structure may be efficiently assembled on a stationary platform support, which may reduce the risk of damage to components of the structure during assembly, may mitigate the effects of weather, tides, currents, etc. on the assembly procedure, and may simplify the assembly process.

[0144] Similarly, in embodiments in which the first body is also stabilized, the components of the structure may be lifted off the effectively stationary body and assembled on an effectively stationary platform support, such as a stationary-stationary lift, which again may further reduce the risk of damage to the components of the structure during assembly, may mitigate the effects of weather, tides, currents, etc. on the assembly procedure, and may simplify the assembly process.

[0145] The first and / or second stabilizing arrangement may comprise at least one panel or member. At least one panel or member may comprise an inflatable element. At least one panel or member, e.g., an inflatable element, may comprise at least one layer of drop stitch material, e.g., drop stitch inflatable material.

[0146] In one example, the drop stitch material, or a panel, member, element, etc. formed from the drop stitch material, may be configured to adopt a particular desired shape or configuration when expanded. Additionally, the drop stitch material (or said elements, members, etc. formed from such material) may be substantially rigid when expanded.

[0147] For example, a panel or stack of panels of drop stitch material may provide temporary buoyancy underneath the first or second body instead of (or in some exemplary embodiments, in addition to) using a barge or watercraft.

[0148] Advantageously, the use of drop stitch material may provide a means of having a controllable amount of air and therefore a controllable means of generating a stabilizing buoyancy.

[0149] In one example, an inflatable bag, the volume of which can be controlled, may be placed under the body, for example under the hull of the body, and then inflated, thereby reducing the draft. The body can then be lowered to the seabed using variable buoyancy, for example in the same way as a submersible barge.

[0150] According to an eleventh aspect of the present disclosure there is provided a method of deploying an apparatus for assembling a structure such as a wind turbine or jacket. The method comprises providing an apparatus according to the ninth aspect to or at an assembly area or location. The method comprises deploying / erecting the apparatus.

[0151] Deploying / erecting the apparatus may include erecting a first erectable structure such that, when erected, the first erectable structure stands / rests on the bottom of the body of water.

[0152] Deploying / erecting the apparatus may include erecting a second erectable structure such that, when erected, the second erectable structure stands / rests on the bottom of the body of water.

[0153] In one example, a second erectable structure may be erected using at least one line or chain extending from and / or through a first erectable structure, i.e., the legs of the second erectable structure may be assembled and / or joined in a first position, e.g., a substantially horizontal arrangement, and then one or more lines may be used to apply a traction force to the second erectable structure to move it to a second position, e.g., a more upright orientation.

[0154] Deploying / erecting the apparatus may include using one final lifting device, such as a lifting device coupled to the first erectable structure and / or the second erectable structure, to lift the elongated structure.

[0155] Deploying / erecting the device may include coupling an elongate structure to the first and second erectable structures.

[0156] In certain embodiments, the elongated structure may be raised and coupled to the first erectable structure and the second erectable structure after erection of the first erectable structure and the second erectable structure.

[0157] In some embodiments, the elongated structures may be configured to be separated and / or lowered from the first and second erectable structures, for example, without collapsing or disassembling the first and second erectable structures, which may advantageously allow the elongated structures to be transported for maintenance.

[0158] In some embodiments, the elongated structure may be configured to erect, e.g., lift, itself from a support, e.g., a barge, to a position for coupling to the first and second erectable structures. For example, a lifting arrangement, e.g., a lifting arrangement typically used for assembly of structures that may be coupled to the elongated structure, may be configured to lift the elongated structure to a position suitable for coupling the elongated structure to the first and second erectable structures.

[0159] Moreover, such a static-static lift arrangement may advantageously allow for the use of relatively shallow assembly ports.

[0160] The elongated structure may be provided with a lifting arrangement. The lifting arrangement may be configurable to transfer a load along the elongated structure between the first and second erectable structures. After deployment / erecting of the apparatus, the lifting arrangement may be provided above a surface level of the body of water.

[0161] Erecting the second erectable structure may include coupling an end of each of the second plurality of legs to a respective support structure, such as a mud mat, in a hinged arrangement. Each of the second plurality of legs may be arranged to extend in a first direction in a first, or folded, or stowed state.

[0162] Deploying / erecting the device may include transitioning the second erectable structure from a first, or folded, or stowed state to a second, or extended state by rotating each of the second plurality of legs about a hinged arrangement such that each of the second plurality of legs is disposed to extend in a second direction.

[0163] The second orientation may be more upright than the first orientation.

[0164] That is, in one example, the first direction may be substantially horizontal and the second direction may be closer to vertical than the first direction.

[0165] In some examples, the second erectable structure may be lowered and / or folded and / or disassembled when not in use. Advantageously, this may reduce visual intrusion. In examples, the second erectable structure may be lowered and / or folded and / or disassembled by pivoting the second erectable structure on a hinged positioning point and / or by reacting from the first erectable structure.

[0166] According to a twelfth aspect of the present disclosure there is provided a method of assembling a structure such as a wind turbine or jacket, the method may comprise deploying an apparatus according to the method of the eleventh aspect.

[0167] The method may include disposing a first base or body in an assembly area substantially beneath at least a portion of the first erectable structure.

[0168] The method may include disposing a second base or body in the assembly area substantially below at least a portion of the second erectable structure.

[0169] The method may include assembling the structure by configuring a lifting arrangement to lift components of the structure from a first base or body towards a second base or body.

[0170] The first base or body may comprise a floating / buoyant barge or vessel for transporting the components.

[0171] Disposing the first base or body in the assembly area may include stabilizing the first base or body against a bottom or floor of the body of water below the elevation arrangement.

[0172] Stabilizing the first base or body may include configuring a stabilizing arrangement, such as a jack, to limit movement of the first base or body relative to the water bottom or floor. As mentioned above, in some embodiments, the stabilizing arrangement may comprise a panel or member comprising an inflatable element and / or a drop stitch material.

[0173] Stabilizing the first base or body may include anchoring the first base or body.

[0174] The second base or body may comprise a floating / buoyant vessel, such as a floater for a wind turbine, for supporting the assembled structure.

[0175] Disposing the second base or body in the assembly area may include stabilizing the second base or body against a bottom or floor of the body of water below the elevation arrangement.

[0176] Optionally, stabilizing the second base or body may include disposing the second base or body on a ground-mounted vessel.

[0177] Optionally, stabilizing the second base or body may include disposing the second base or body on a buoyant marine vessel.

[0178] Optionally, stabilizing the second base or body may include disposing the second base or body on the seabed. As mentioned above, in some embodiments, a stabilizing arrangement for stabilizing the second base or body, such as a floater, may comprise a panel or member comprising an expandable element and / or a drop stitch material.

[0179] Optionally, stabilizing the first base or body may include controlling volume or air within one or more expandable elements disposed under and / or around at least a portion of the second base or body.

[0180] Advantageously, this may allow for the use of more assembly locations as the assembled structure, for example the turbine, may be floated from a second base or body to a deep water location.

[0181] Optionally, stabilizing the second base or body may include anchoring the second base or body.

[0182] Optionally, stabilizing the second base or body may include controlling volume or air within one or more expandable elements disposed under and / or around at least a portion of the second base or body.

[0183] The structure may comprise or include the following: multiple parts or components, segmented (offshore) structures, floating / buoyant foundations, monopiles, and jackets, e.g., tripod jackets, four-legged jackets or torsion jackets.

[0184] In the case of a structure comprising a wind turbine, the wind turbine may comprise a number of parts or components comprising one or more of the following: a column or tower section, a nacelle, and a number of turbine blades.

[0185] The above summary is intended to be merely illustrative and non-limiting. The present disclosure includes one or more corresponding aspects, embodiments or features, whether or not specifically mentioned (including claimed) in combination or alone, alone or in various combinations. It should be understood that the features defined above according to any aspect of the present disclosure, or the features defined below with respect to any specific embodiment of the present disclosure, can be used alone or in combination with any other defined features in any other aspect or embodiment, or to form further aspects or embodiments of the present disclosure.

[0186] Embodiments of the present disclosure will now be described, by way of example only, with reference to the accompanying drawings, in which: [Brief description of the drawings]

[0187] [Figure 1] FIG. 1 is a schematic diagram of an apparatus for assembling an offshore structure according to a first embodiment of the present disclosure, the apparatus being transported to an offshore assembly / installation area. [Figure 2(a)] 2 is a series of views of the apparatus of FIG. 1 deployed at an offshore location including an area of ​​water. [Figure 2(b)] 2 is a series of views of the apparatus of FIG. 1 deployed at an offshore location including an area of ​​water. [Figure 2(c)] 2 is a series of views of the apparatus of FIG. 1 deployed at an offshore location including an area of ​​water. [Figure 2(d)] 2 is a series of views of the apparatus of FIG. 1 deployed at an offshore location including an area of ​​water. [Figure 2(e)] 2 is a series of views of the apparatus of FIG. 1 deployed at an offshore location including an area of ​​water. [Figure 3(a)] FIG. 1 is a diagram of the device deployed in an area of ​​water. [Figure 3(b)] FIG. 1 is a diagram of the device deployed in an area of ​​water. [Figure 4] FIG. 2 is a diagram of the apparatus of FIG. 1 with the offshore structure erected in an area of ​​water. [Diagram 5] FIG. 5 is a detailed view of the top of the erected device of FIG. 4. [Figure 6(a)] 5 is a series of schematic diagrams illustrating successive steps in erecting the offshore structure of FIG. 4. [Figure 6(b)] 5 is a series of schematic diagrams illustrating successive steps in erecting the offshore structure of FIG. 4. [Figure 6(c)] 5 is a series of schematic diagrams illustrating successive steps in erecting the offshore structure of FIG. 4. [Figure 6(d)] 5 is a series of schematic diagrams illustrating successive steps in erecting the offshore structure of FIG. 4. [Figure 6(e)] 5 is a series of schematic diagrams illustrating successive steps in erecting the offshore structure of FIG. 4. [Figure 7(a)] 5A-5C are schematic diagrams of a series of steps in assembling an offshore structure using an apparatus for assembling an offshore structure according to a second embodiment of the present disclosure; [Figure 7(b)] 5A-5C are schematic diagrams of a series of steps in assembling an offshore structure using an apparatus for assembling an offshore structure according to a second embodiment of the present disclosure; [Figure 7(c)] 5A-5C are schematic diagrams of a series of steps in assembling an offshore structure using an apparatus for assembling an offshore structure according to a second embodiment of the present disclosure; [Figure 8(a)] 2 is a schematic diagram of a sequence of steps in assembling an alternative offshore structure using the apparatus of FIG. 1; [Figure 8(b)] 2 is a schematic diagram of a sequence of steps in assembling an alternative offshore structure using the apparatus of FIG. 1; [Figure 9(a)-(c)]Figure 9(a) is a front view of an offshore wind turbine assembled using a device / apparatus according to the present disclosure, Figure 9(b) is a perspective view from one side and above of an offshore wind turbine assembled using a device / apparatus according to the present disclosure, and Figure 9(c) is a site view of an offshore wind turbine assembled using a device / apparatus according to the present disclosure. [Figure 10(a)] FIG. 13 is a side view of an apparatus according to a third embodiment of the present disclosure with an offshore wind turbine in situ. [Figure 10(b)] FIG. 13 is a perspective view from one side and above of an apparatus according to a third embodiment of the present disclosure with an offshore wind turbine in situ. [Figure 10(c)] FIG. 13 is a further perspective view from one side and above of an apparatus according to a third embodiment of the present disclosure with an offshore wind turbine in situ. [Figure 10(d)] FIG. 13 is another further perspective view from one side and above of an apparatus according to the third embodiment of the present disclosure with an offshore wind turbine in situ. [Figure 11(a)] FIG. 10(a)-(d) are perspective views of the main and auxiliary lifting gears of the apparatus of FIG. [Figure 11(b)] FIG. 10(a)-(d) are side views of the main and auxiliary lifting gears of the apparatus of FIG. [Figure 11(c)] FIG. 10(a)-(d) are side views of the main and auxiliary lifting gears of the apparatus of FIG. [Figure 12(a)] 10(a)-10(d) are a series of views of the tagging winch of the apparatus of FIG. 10(a)-FIG. 10(d). [Figure 12(b)] 10(a)-10(d) are a series of views of the tagging winch of the apparatus of FIG. 10(a)-FIG. 10(d). [Figure 12(c)] 10(a)-10(d) are a series of views of the tagging winch of the apparatus of FIG. 10(a)-FIG. 10(d). [Figure 12(d)] 10(a)-10(d) are a series of views of the tagging winch of the apparatus of FIG. 10(a)-FIG. 10(d). [Figure 13(a)] 10(a) to 10(d) are a series of diagrams showing the erection or standing up of the apparatus. [Figure 13(b)]10(a) to 10(d) are a series of diagrams showing the erection or standing up of the apparatus. [Figure 13(c)] 10(a) to 10(d) are a series of diagrams showing the erection or standing up of the apparatus. [Figure 13(d)] 10(a) to 10(d) are a series of diagrams showing the erection or standing up of the apparatus. [Figure 13(e)] 10(a) to 10(d) are a series of diagrams showing the erection or standing up of the apparatus. [Figure 13(f)] 10(a) to 10(d) are a series of diagrams showing the erection or standing up of the apparatus. [Figure 13(g)] 10(a) to 10(d) are a series of diagrams showing the erection or standing up of the apparatus. [Figure 13(h)] 10(a) to 10(d) are a series of diagrams showing the erection or standing up of the apparatus. [Figure 13(i)] 10(a) to 10(d) are a series of diagrams showing the erection or standing up of the apparatus. [Figure 14] FIG. 13 is a side view showing an offshore wind turbine in situ of an apparatus according to a fourth embodiment of the present disclosure. [Figure 15a] FIG. 1 is a perspective view of a running gear module according to one embodiment of the present disclosure. [Figure 15b] FIG. 16 is a diagrammatic view of the running gear module of FIG. [Figure 16] FIG. 13 is a schematic diagram of an apparatus for assembling an offshore structure according to a ninth embodiment of the present disclosure, the apparatus being deployed to an assembly / installation area with components of the offshore structure disposed on first and second assemblies. [Figure 17(a)] FIG. 17 is a view of the apparatus of FIG. 16 with the offshore structure components partially erected. [Figure 17(b)] FIG. 17 is a view of the apparatus of FIG. 16 with the offshore structure components partially erected. [Figure 18(a)] FIG. 17 is a diagram of the apparatus of FIG. 16 with the lifting arrangement deployed and attached to a component of the offshore structure. [Figure 18(b)]FIG. 17 is a diagram of the apparatus of FIG. 16 with the lifting arrangement deployed and attached to a component of the offshore structure. [Figure 19(a)] FIG. 13 is a side view of a second body for assembling the offshore structure in a floatable configuration. [Figure 19(b)] FIG. 13 is a side view of a second body for assembling the offshore structure in a floatable configuration. [Figure 19(c)] FIG. 13 is a perspective view of a second body for assembling the offshore structure in a floatable configuration. [Figure 20(a)] FIG. 20 is a side view of the body of FIG. 19 in a grounded configuration. [Figure 20(b)] FIG. 20 is a side view of the body of FIG. 19 in a grounded configuration. [Figure 20(c)] FIG. 20 is a perspective view of the body of FIG. 19 in a grounded configuration. [Figure 21(a)] FIG. 20 is a side view of the body of FIG. 19 in a grounded configuration with components of the on-site offshore structure. [Figure 21(b)] FIG. 20 is a side view of the body of FIG. 19 in a grounded configuration with components of the on-site offshore structure. [Figure 21(c)] FIG. 20 is a perspective view of the body of FIG. 19 in a grounded configuration with components of the on-site offshore structure. [Figure 22(a)] 20A and 20B are perspective and side views of the body of FIG. 19 in a floatable configuration with on-site offshore structure components. [Figure 22(b)] 20A and 20B are perspective and side views of the body of FIG. 19 in a floatable configuration with on-site offshore structure components. [Figure 23(a)] 17 is a series of perspective views illustrating the lifting of a component of an offshore structure from a first to a second assembly using the apparatus of FIG. 16; [Figure 23(b)] 17 is a series of perspective views illustrating the lifting of a component of an offshore structure from a first to a second assembly using the apparatus of FIG. 16; [Figure 23(c)] 17 is a series of perspective views illustrating the lifting of a component of an offshore structure from a first to a second assembly using the apparatus of FIG. 16; [Figure 23(d)]17 is a series of perspective views illustrating the lifting of a component of an offshore structure from a first to a second assembly using the apparatus of FIG. 16; [Figure 24] FIG. 17 is a perspective view of an offshore wind turbine in situ of the apparatus of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0188] 1 to 6(e), there is shown a device / apparatus according to a first embodiment of the present disclosure, generally indicated at 5. The device / apparatus 5 is adapted for assembling an offshore structure 10 (see Figures 4 and 6(e)), such as a wind turbine or (offshore) wind turbine (generator).

[0189] In this embodiment the device / apparatus 5 is used in assembling a structure 10 which is an offshore wind turbine. However, it will be understood that the structure may also be another offshore structure, for example an offshore jacket. The device / apparatus 5 comprises a (vertically) erectable structure 15 and a lifting arrangement 20.

[0190] The device / apparatus 5, when e.g. erected, comprises or provides an assembly area 25 below the lifting arrangement 20, e.g. on the surface of the area of ​​water. Alternatively, the assembly area can be on land / terrestrial area, e.g. on the surface of a quay. The assembly area 25 is provided within a perimeter, area or volume of the device / apparatus 5. The lifting arrangement 20 is provided above the assembly area 25, advantageously directly above it.

[0191] The erectable structure 15 is disposable in a first, or folded, state (see FIG. 1). The first state facilitates movement or transportation of the device / apparatus 5. The erectable structure 15 is disposable in a second, extended, or erected state (see FIG. 3(a)-FIG. 6(e)). The erectable structure 15 is extendable or selectively movable from the first state to the second state. The erectable structure 15 is foldable or further selectively movable from the second state to the first state. This selective disposition facilitates the erectable structure 15 being transported in a folded state to a location for assembling the structure 10, i.e., to an assembly area, and then being extended and erected at that location. Furthermore, this selective disposition may facilitate the erectable being folded and / or removed from the assembly area 25 after the structure 10 is assembled.

[0192] In another embodiment (see Figures 8(a)-13(i)), the structure can be assembled and / or erected on site or in situ. This embodiment facilitates parts of the structure being transported to the site individually, or at least unassembled, for assembly on site.

[0193] The structure 15 comprises a number of legs 35, 36, 37 and / or a top (member) 50. The legs 35, 36, 37 are connected or connectable to the top (member) 50.

[0194] The lifting arrangement 20 is, in use, provided below, for example directly below, the top (member) 50 .

[0195] In this preferred embodiment, the device / apparatus 5 comprises a tripod body 30 or tripod arrangement. Alternatively, the device / apparatus 5 can comprise a tetrapod body. The tripod body 30 comprises three legs 35, 36, 37. Each of the three legs 35, 36, 37 is attached at a first end 40 to a connecting member 45, for example hinged. The connecting member 45 comprises a top 50 of the tripod body 30. The lifting arrangement 20 is attached to the connecting member 45 or the top 50 and / or depends (vertically downwards) from it in use. In this way, the lifting arrangement 20 is provided between the three legs 35, 36, 37. Each leg 35, 36, 37 is provided at a second end with a mud mat 38. The / each mud mat 38 can be selectively buoyant or submersible.

[0196] The lifting arrangement 20 comprises an arrangement 55 for connecting or supporting the part of the offshore structure 10 to be lifted. The connecting arrangement 55 comprises one or more hooks, shackles etc. The lifting arrangement 20 thus provides a single point lifting arrangement, with a single lifting point for supporting a load, e.g. a part / component of the structure 10.

[0197] The lifting arrangement 20 comprises one or more pulley arrangements 60 and / or winches.

[0198] 7(a) and 7(c), a device / apparatus 5a according to a second embodiment of the present disclosure is shown. The device / apparatus 5a of the second embodiment is similar to the device / apparatus 5 of the first embodiment, and like parts are identified by like numerals but suffixed with the letter "a."

[0199] In the device / apparatus 5a, one or more lines 65a, 66a, 67a (control / tethering / tagging lines) are provided between at least one, and preferably each, of the legs 35a, 36a, 37a, the lines being adapted to be connected to a load (e.g. part of a structure) to be lifted by the lifting arrangement.

[0200] 8(a) and 8(b), there is shown a device / apparatus 5 according to a first embodiment of the present disclosure. In this example, the device / apparatus is used to assemble an offshore jacket 12.

[0201] In both the first and second embodiment the legs 35, 36, 37; 35a, 36a, 37a of the device / apparatus 5; 5a comprise a (metal) grid arrangement.

[0202] 9(a)-13(i), there is shown a device / apparatus 5b according to a third embodiment of the present disclosure. The third embodiment device / apparatus 5b is similar to the first embodiment device / apparatus 5, and like parts are identified by like numerals but suffixed with the letter "b."

[0203] In the device / apparatus 5b, the components of the device / apparatus are assembled on-site, ie in an assembly area 25b.

[0204] A connection piece 68b is provided at the intersection of lines 65a, 66b, 67b.

[0205] At or near the ends of the legs 35b, 36b, 37b distal from the apex 50b are further lines or cables 145b which extend circumferentially between adjacent legs 35b, 36b, 37b.

[0206] Another further line 150 may be provided at or near the end of each leg 35b, 36b, 37b, which further lines 35b, 36b, 37b extend (horizontally) to meet at the (base) centre point of the device / apparatus 5b, for example below the top 50b.

[0207] In this embodiment, an auxiliary winch 75'b is provided.

[0208] The present disclosure provides a system for assembling an offshore structure (such as a wind turbine or jacket), the system comprising devices / apparatus 5, 5a, 5b.

[0209] The system comprises a floating or buoyant body 70 for transporting one or more parts of the offshore structure to the assembly area 25 .

[0210] The system comprises, for example, one or more winches 75 for controlling the lifting arrangement.

[0211] The one or more winches 75 may be provided on a further buoyant or floatable body 80. The further buoyant or floatable body 80 is adapted to be fastened to the legs 35 of the device / apparatus 5. For example, the further buoyant or floatable body 80 comprises a slot or recess 85 for engaging with the legs 35 of the device / apparatus 5. The slot 85 may also receive a connecting member during transport of the device / apparatus when in the folded state.

[0212] The present disclosure provides a method for deploying a (floating / buoyant) offshore structure, such as a wind turbine, a device / apparatus 5, 5a, 5b for assembling an (offshore) structure 10, such as a wind turbine or a jacket. The method comprises: Providing the device / apparatus 5, 5a, 5b at or to an assembly area 25 or location; Deploying / setting up the device / apparatus 5, 5a Includes.

[0213] In the disclosed embodiment, the assembly area 25, 25a, 25b or location is an area of ​​water. Also, in the disclosed embodiment, the device / apparatus 5, 5a, 5b stands / rests on the bottom of the body of water 86, e.g., the seabed 90, when erected. Also, the top 50 and the lifting arrangement 20 are provided above the surface level 95 of the body of water 86.

[0214] Providing the devices / equipment 5 , 5 a , 5 b to the assembly areas 25 , 25 a , 25 b involves the use of one or more vessels or barges 100 .

[0215] The present disclosure provides a method for assembling a structure or wind turbine, such as an offshore structure 10, a wind turbine or a jacket, the method comprising: Deploying the device / apparatus 5, 5a, 5b according to the method described above; transporting a first portion 105 of the offshore structure 10 to an assembly area; Lifting the first portion 105 using the lifting arrangement 20; Transporting the floating / buoyant base or foundation body 110 to an assembly area 25; Connecting / clamping the first portion 105 of the structure 10 to a floating / buoyant base body; Includes.

[0216] The method comprises the following subsequent steps: transporting further portions of the structure 10 to an assembly area 25; Lifting the further part using the lifting arrangement 20; and Transporting the floating / buoyant base body to an assembly area 25; Lowering and / or connecting a further portion of the structure to a first / one portion of the structure already provided on the floating / floating base body 110; may include:

[0217] The structure 10 (including the buoyant base body 110) is a buoyant structure.

[0218] The structure 10 comprises: A plurality of parts or components; A segmented (offshore) structure; Floating / buoyant foundations; Monopile and a wind turbine (see Figure 4 and Figures 6(a) to 6(e) or Figures 7(a) to 7(c)); jacket (see Fig. 8(a) and Fig. 8(b)), for example, a tripod jacket, a four-legged jacket or a twisted jacket; Equipped with or including.

[0219] In the case of a structure 10 comprising a wind turbine, the parts are: a column or tower, e.g., first and second column sections 115, 120 (e.g., about 400-500 tons each); Nacelle 125 (for example, about 60 tons) and A plurality of turbine blades, for example three turbine blades 130, 131, 132 (for example, about 60 tons each); The present invention includes one or more of the following:

[0220] In such a case, there are a given number of parts (six) and therefore a demand for the same given number of lifts (six).

[0221] In the embodiment shown in Figures 9(a)-13(i), the method involves using towers 140, posts or columns to support (parts of) the structure during assembly.

[0222] Arrangements may be provided for extending or increasing the height of the towers 140, posts or columns, e.g. at intervals, during use, to raise the structure 10b and / or the top 50b of the structure 10b, e.g. the towers may be telescopic.

[0223] Typically, the blades 130, 131, 122 are elevated horizontally.

[0224] According to the present disclosure, there is provided a method for assembling an (offshore) structure 10, such as an (offshore) wind turbine or an (offshore) jacket, comprising the following steps:

[0225] Providing a lifting arrangement 20, the lifting arrangement comprising:

[0226] a gantry disposed above and / or directly above the area of ​​water; a lifting means or device coupled to the gantry; Providing and providing Stacking portions of a structure 10, transportably disposing a first portion of the structure 10 against or in an area of ​​water; Lifting the first portion using a lifting means; configuring a clamping or holding device 135 to grasp the first portion; transporting the clamping or holding device away from the area of ​​water; Lifting a second portion of the structure 10 using a lifting means or device; disposing the first portion below or adjacent to the second portion by further transporting the first portion gripped by the clamping device 135 into the area of ​​water; lowering the second portion onto or in connection with the first portion; By stacking Includes.

[0227] The step of lifting the second portion using a lifting means or device comprises hoisting and / or raising the second portion upwardly to a height above a top level of the first portion.

[0228] The method includes fixedly coupling the second portion to the first portion by bolting, welding, and / or clamping.

[0229] The structure 10 may be, for example, a wind turbine assembly, such as an offshore wind turbine, or a jacket, such as an offshore jacket, for supporting a wind turbine.

[0230] The first portion and / or the second portion and / or the one or more further portions may be at least one of a part of a tower or a nacelle or a turbine blade.

[0231] The method comprises depositing one / further portion on the second portion,

[0232] lifting the further portion using a lifting means; and disposing a second portion of the structure beneath the further portion by conveying the second portion to an area of ​​water; lowering the further portion onto the second portion; The method further includes stacking the

[0233] The clamping device may be provided on a floating or buoyant body, for example a buoyant base or a (top) crown assembly.

[0234] The clamp 135 or clamping device is configured to support and / or clamp and / or grip at least a portion of the structure 10 in a vertical arrangement and / or in a substantially upright configuration.

[0235] The present disclosure provides a system for assembling a structure 10, such as an (offshore) wind turbine or an (offshore) jacket. The system comprises: a gantry disposed above and / or directly above the area of ​​water; a lifting means coupled to the gantry; Means for transporting a portion of the structure 10 to and from an area of ​​water; and the means for transporting the part of the structure comprises a clamping or holding device 135. The clamping or holding device 135 is configurable between a clamping or holding configuration for gripping a portion of the structure 10 and a non-clamping or non-holding configuration. The clamping device 135 is coupled to or mounted to a floating or buoyant base body 110, for example a buoyant foundation or (top) crown assembly or barge. The lifting means comprises a winch 75 and / or a pulley or pulley arrangement 60 . The system is adapted to assemble an offshore wind turbine assembly or a wind turbine assembly or jacket, such as an offshore jacket assembly, for example for a wind turbine. The system includes a clamping and / or gripping system, the clamping and / or gripping system comprising: a clamping device 135 for gripping at least a portion of the wind turbine assembly; A floating or buoyant base body 110; , and the clamping device is mounted to a floating or buoyant base body 110. The clamping device 135 is configured to support at least a portion of the wind turbine assembly or the jacket assembly in a vertical arrangement and / or in a substantially upright configuration.

[0236] The clamping device 135 is configured to engage a flange or rim disposed on an outer surface of a portion of the structure 10 .

[0237] 14, there is shown a device / apparatus 5c according to a fourth embodiment of the present disclosure. The fourth embodiment device / apparatus 5c is similar to the first embodiment device / apparatus 5, and like parts are identified with like numerals but suffixed with the letter "b."

[0238] In the fourth embodiment device / apparatus 5c, each leg 35c, 36c, 37c is provided with a support member 38. Three support members 38 are provided at or near the end of each of the legs 35c, 36c, 37c distal from the top 50c. Each support member 38 is deployed in a substantially vertical arrangement in use. The support members provide support / strength to each leg 35c, 36c, 37c in a manner that attempts to avoid buckling of the legs 35c, 36c, 37c.

[0239] With respect to the various embodiments of the present disclosure, the reader is advised to note the following. 1. The system creates a single point of sufficient height to lift the nacelle 125 to the top of a column of floating wind turbines, which is expected to be approximately 220m above sea level. 2. A single point lift may have multiple hooks of different capacities, e.g. 1000 tonnes and 120 tonnes. These are sometimes suspended from the same location below the lifting point on a triplate arrangement. 3. The system is planned to be supported (moored) to the seabed. 4. The system is planned to be in water deep enough to allow a floating turbine support structure to be floatably positioned at the turbine location directly below the hook. 5. The structure supporting the hook may be freestanding. 6. The components can be placed under the hook using a floating means of transportation – a barge or ship. 7. The marine transport is planned to be moored so that it can be moved under the hook without cutting the mooring and then left for storage. The position is moved by a winch that adjusts the length of the mooring line. 8. A floating structure is similarly moored and moved beneath the hook for installation of the wind turbine components. 9. The wind turbine components are lifted higher than their location on the floating structure and once the structure is positioned under the hooks the components are lowered into position on the floating structure. 10. The support structure may be realized by one of the following methods: A tripod structure having pads that support it on the seabed. b. Two pile towers with a beam at the top (similar to a wind turbine tower) span between the towers with a hook hanging from the beam. The towers may be angled so that the spacing is greater at the base than at the top since the floating structure is wider at the base than at the top. This reduces the size of the beam at the top. The support piles may also be angled to limit bending moments (axial compressive forces) in the towers. c. The tower may be a lattice structure. d. The tower may be dismantled for ease of transportation. 11. The system is also used to install the blade, which is one of the reasons for the smaller hook. 12. The winch for the hook is at the base of the tower above the water line. Power for the winch may be on the tower or from another vessel or source. 13. The winch is most likely to be a multi-fault. It may be two winches with a common wire that allows adjusting the working point of the wire to extend its life. The winches may be on separate legs. 14. The hook may have some localized rear movement. 15. The hook has a swivel that can be powered. 16. There are various access platforms that allow access to the various components as required to carry out assembly operations. These may be retractable platforms that extend from their base points on the tower and can pivot and vary in height. 17. The tower may be floating when at sea or the tower may have fixed tanks. 18. There is a personnel transport system (lift) and an equipment transport system on the inside or outside of at least one of the legs.

[0240] With respect to the embodiment in which the structure 10 is, for example, a jacket for a wind turbine, the reader will note the following.

[0241] Support jackets for offshore wind turbines are sometimes made in halves (upper and lower) and joined together before going offshore. A single point lift can be used for that purpose. In such cases the reader may note that: 1. The jacket is attached (moored) to the seabed. 2. The jackets can come to the site assembled in halves aboard a barge / ship. 3. The buoyant transporter is placed below the lifting point and attached to the top of the jacket. 4. The top of the jacket is raised and suspended higher than the bottom of the jacket. 5. Move the buoyant transporter so that the lower part of the jacket is below the upper part. 6. The top part is lowered and lands on the bottom of the jacket. 7. A permanent connection between the top and bottom is completed.

[0242] This can be particularly beneficial in locations with multiple bridges at the entrances to ports and the like.

[0243] In addition to the aforementioned attributes, notable features of the present disclosure include: Single point lift, optionally with small travel (500mm). It can be from: · A gantry (fixed to the seabed), which may be tapered towards the top. · Three legged tripods or four legged tetrapods, which can have equal leg sizes and therefore equal angles, or different sized legs / angles. · Because the lifting point is static, construction of the wind turbine tower (on a floating foundation) or jacket (on a barge or similar) is by moving the "float" or barge and tower / jacket components in and out under a single point lift. This can be via winch or vessel (tug), with winches being preferred to move the vessel away from the lifting structure. Erection of the tripod / tetrapod can be by pushing from below / lifting from above the central tripod / tetrapod as the case may be, together with tightening the connections between the legs. The tripod / tetrapod can be assembled dockside or at a pier and towed to the site, or towed to the site and partially assembled. The tripod / tetrapod may have buoyancy fitted around the structure (or as part of the structure itself) to aid in erection and may for example be partially assembled in water. The tripod / tetrapod may be mobile and transportable. The device / equipment may be used for construction and / or subsequent maintenance. The device / apparatus may be used onshore (although the inventors anticipate that the greatest benefit will come from offshore use in areas of sufficient depth, with sufficiently deep access channels, that are reasonably protected, near the workforce, and near marshalling and support port facilities).

[0244] It will be understood that the above-described embodiments of the present disclosure are given by way of example only and are not meant to limit its scope in any way.

[0245] It will be appreciated that in preferred embodiments of the present disclosure the structure is a floating / floating structure and / or is provided on a floating / floating (base) body or foundation.

[0246] The device / apparatus according to the embodiment of the present disclosure comprises: Unmanned lifting of structural parts, - the landing of the structural parts in the assembly area without human intervention; There is no need for personnel to be located under the lifting arrangement when in use. It will be appreciated that this enables

[0247] FIG. 15a shows a perspective view of a running gear module according to one embodiment of the disclosure. FIG. 15b shows a line diagram of the running gear module of FIG. 15a. The layout actually has two top assemblies, the top holds the three legs together and supports the running gear module that can run up and down a structure such as a post or column, such as the tower 140. In one example, the weight of the running gear may be in the region of 250t, but the load it can generate may be the full capacity of a multi-fall hook. In an exemplary embodiment, a lifting force of 1000t, 1500t, or even more may be provided.

[0248] Shown is the top assembly 105. The top assembly 105 may be the center section.

[0249] The three legs 110a, 110b, 110c of the erectable structure are also shown.

[0250] The top assembly 105 holds the three legs 110a, 110b, 110c together and supports a running gear module 115 that can run up and down a structure, for example up and down a post or column such as a tower 140.

[0251] Shown is a first plurality of pin and clevis arrangements 120. The pin and clevis arrangements 120 connect the top assembly 105 to the three legs 110a, 110b, 110c.

[0252] Also shown is a hoist 125 for lifting the running gear module 115. In a non-limiting example, the hoist may have a 300 t capacity.

[0253] As shown, when fully in place, the second multiple pin and clevis arrangement 130 may secure the running gear module 115 to a structure, such as the three legs 110a, 110b, 110c, thereby providing a mechanical connection.

[0254] With general reference to the above-described embodiments, and in particular the exemplary embodiment of Figures 15a and 15b, 1. The erection of the tripod (or multi-legged structure) may be assisted by a post mounted on the floating structure that passes through the middle part of the "tripod". The middle part of the structure may then be "walked" up the post, for example with a walking clamp or clamps, while simultaneously pulling the tension member between the middle and base of the legs or between the base of the legs. The post may first be on the floating structure with the top of the multi-legged structure placed around the post (the post may then be installed on the deck on the parts that will be joined together, or may be lowered on top of the post). The floating structure may be lowered to the seabed to provide a reaction to lift the multi-legged structure into place, or may be floating if there is sufficient buoyancy and stability capacity to react to the loads. The post may alternatively have a linear winch mounted on the top to lift the top of the multi-legged structure, or may have a return sheave with a winch on the deck. The post may have another post on the inside so that when the top of the multi-legged structure reaches the top of the post, an inner post may be extended to continue the lifting process. 2. The multi-legged structure may be erected without any lifting machinery in place, which may then be lifted into place after the structure is erected. 3. An erectable structure may have some of its main structural components lifted into place following initial erection of the structure. These structural components may also form part of a platform for a lifting machine. 4. Lifting machinery may be capable of being lowered and removed for any reason including, but not limited to, servicing, maintenance, repair and storage. 5. The wind protection of a structure may be reduced by removing parts of the structure, especially the superstructure, e.g. roofs or safety areas for personnel that may only be needed during work. 6. Portions of the structure that are lifted after the initial erection may be used to make the structure more rigid to reduce buckling loads. 7. In the case of a tripod, it is envisaged that there may be mud mat barges at the base of each leg. These barges may accommodate buoyancy that may extend from their decks, with their tops above the waterline when on the seabed. 8. This may help sink the mud mat barge into place.

[0255] The mud mat barge may be ballasted to provide lateral stability (from wind and tidal forces, etc.) during operation. This may be achieved by one of the following: a. Pumping in water or other dense material to provide a gravity anchor (e.g. mud or hematite) b. Sheet piles around the mud mat barge c. Pile anchor d. Suction anchor e. Dry anchors attached by chain, wire or rope f. Anchor the line to the shore.

[0256] Referring now to Figure 16, there is shown an apparatus generally indicated at 1005. The apparatus 1005 is adapted to assemble an offshore structure 1010 (see Figure 24), such as a wind turbine or an (offshore) wind turbine (generator).

[0257] In this embodiment the apparatus 1005 is used in assembling a structure 1010 which is an offshore wind turbine. However, it will be appreciated that the structure may be another offshore structure, for example an offshore jacket. The apparatus 1005 comprises first and second (vertically or substantially vertically) erectable structures 1015, 1016, an elongated structure 1017 and a lifting arrangement 1020 (see Figures 17a-18b).

[0258] The device / apparatus 1005, when erected, defines an assembly area below the lifting arrangement 1020, e.g. above an area of ​​water, e.g. the bottom or floor of a body of water, e.g. the ocean floor. Alternatively, the assembly area can be on a land / terrestrial area, e.g. the surface of a dock. The assembly area may be provided below, e.g. directly below, the lifting arrangement 1020, e.g. when erected.

[0259] An assembly area is provided within a perimeter, area or volume of the apparatus 1005. A lifting arrangement 1020 is provided above the assembly area, advantageously directly above the assembly area.

[0260] The first and second erectable structures 1015, 1016 are disposable in a first or folded state. For example, FIG. 1 shows a structure corresponding to the first erectable structure 1015 in a folded state. The first state facilitates movement or transportation of the device 1005. The first and second erectable structures 1015, 1016 are disposable in a second, extended or erected state (see FIG. 16-FIG. 18(b)). The erectable structure 1015 is extendable or selectively movable from the first state to the second state. The first and second erectable structures 1015, 1016 are foldable or further selectively movable from the second state to the first state. This selective arrangement facilitates the first and second erectable structures 1015, 1016 being transported in a folded state to a location, i.e., an assembly site, for assembling the structure 1010, and then being extended and erected at that location. Additionally, this selective arrangement may facilitate the first and second erectable structures 1015, 1016 being folded and / or removed from the assembly site after the structure 1010 is assembled.

[0261] The first and second erectable structures 1015, 1016 may be similar to the erectable structure 15 of the first embodiment of the present disclosure. The first structure 1015 comprises a first plurality of legs 1035, 1036, 1037 and / or a first connection arrangement 1050. The legs 1035, 1036, 1037 are connected or connectable to the first connection arrangement 1050. The second structure 1016 comprises a second plurality of legs 1033, 1034 and / or a second connection arrangement 1051. The legs 1033, 1034 are connected or connectable to the second connection arrangement 1051.

[0262] The first and / or second connection arrangements 1050, 1051 may comprise an apex member, such as apex (member) 50 of the first embodiment of the present disclosure. The apex (member) of the first and second connection arrangements 1050, 1051 may define first and second apexes 1052, 1053 of the first and second pluralities of legs, respectively.

[0263] The elongated structure 1017 extends between the first and second erectable structures 1015, 1016. The elongated structure 1017 is preferably connected or connectable to the first and second erectable structures 1015, 1016 by first and second connecting arrangements 1050, 1051 respectively, and more preferably extends directly beneath the first and second connecting arrangements 1050, 1051.

[0264] In this embodiment, the first standable structure 1015 comprises a tripod 1030 or tripod arrangement and the second standable structure 1016 comprises a pair of sheer legs 1031. Alternatively, the first standable structure 1015 may comprise a tetrapod and / or the second standable structure 1016 may comprise an A-frame, tripod or tetrapod. The exemplary tripod 1030 comprises three legs 1035, 1036, 1037. Each of the three legs 1035, 1036, 1037 is attached at a first end 1040 to a first connection arrangement 1050, e.g. hinged. The exemplary sheer leg 1031 comprises two legs 1033, 1034. Each of the two legs 1033, 1034 is attached at a first end 1041 to a second connection arrangement 1051, for example hinged or fixedly attached.

[0265] Each leg 1033, 1034, 1035, 1036, 1037 is provided with a mud mat 1038 at a second end. Alternatively, as shown in this exemplary embodiment, one or more legs, e.g. 1034 and 1036, may share a mud mat 1038. The / each mud mat 1038 may be selectively buoyant or submersible. Each leg 1033, 1034, 1035, 1036, 1037 may be hingedly coupled to its respective (or shared) mud mat 1038 such that it is configured or configurable to pivot at a second end relative to its respective (or shared) mud mat 1038. In this embodiment, the legs 1033, 1034, 1035, 1036, 1037 of the device 1005 comprise a (metal) lattice arrangement.

[0266] In this embodiment, the legs 1033, 1034, 1035, 1036, 1037 are of a fixed length. Alternatively, one or more of the legs 1033, 1034, 1035, 1036, 1037 may be configured to be extendable and / or may be configured to extend by inserting an extension portion into the respective leg.

[0267] In this exemplary embodiment, the elongated structure 1017 comprises a beam with a cantilevered portion extending from the second erectable structure 1016 in a direction away from the first erectable structure 1015. Alternatively, the elongated structure 1017 may comprise a truss and / or the cantilevered portion may comprise a tapered portion (see elongated structure 1017a in Figures 17a / b).

[0268] 17a-18b, there is shown an apparatus 1005 according to a ninth embodiment of the present disclosure. In this example, a lifting arrangement 1020 is used to lift the assembled column portions 1115, 1120 of a structure 1010.

[0269] The lifting arrangement 1020 is configured / configurable to move a load, e.g. assembled column parts 1115, 1120, along the elongated structure between the first and second erectable structures 1015, 1016. The lifting arrangement 1020 comprises an arrangement 1055 for connecting or supporting a part of the offshore structure 1010 to be lifted. The connecting arrangement 1055 comprises one or more hooks, shackles etc. Thus, the lifting arrangement 1020 provides a single point lifting arrangement, e.g. with a single lifting point for supporting a load, e.g. a part / component of the structure 1010, e.g. assembled column parts 1115, 1120 etc.

[0270] The lifting arrangement 1020 comprises one or more pulley arrangements 1060 and / or winches.

[0271] 17a to 24, there is provided a system according to a tenth aspect of the present disclosure for assembling a structure such as a wind turbine or jacket, comprising an apparatus 1005 according to the ninth aspect.

[0272] The system comprises a first body 1070 for transporting one or more parts of the structure 1010, such as assembled column parts 1115, 1120, to an assembly area provided below at least a portion of the lifting arrangement 1020.

[0273] In this exemplary embodiment, the first body 1070 is a floating or buoyant body, such as one or more barges, vessels, etc. The first body 1070 may be stabilized against the bottom or floor of the body of water below the lifting arrangement 1020 using a first stabilizing arrangement, such as a jack, mooring or anchor arrangement (not shown), that limits movement of the first body 1070 relative to the seabed or floor.

[0274] The system further comprises a second body 1071 for transporting one or more parts of the structure 1010, such as the floating / buoyant base or foundation body 1110, to an assembly area provided below at least a portion of the lifting arrangement 1020 and / or for assembling the structure 1010.

[0275] 19a-20c show an exemplary embodiment of the second body 1071 according to the system of the present embodiment. In this exemplary embodiment, the second body 1071 is a selectively submersible body comprising a plurality of submersible barges, vessels, etc. 1100 coupled together with a plurality of high capacity beams 1101. The second body may comprise an upper structure 1102 for supporting and / or mounting one or more portions of the structure 1010 during transportation of the portions to an assembly area and / or during construction of the structure 1010. The upper structure 1102 is preferably configurable such that the upper structure 1102 is above the water line when the second body 1071 is submerged in water (see FIGS. 20a-20b).

[0276] Alternatively, the second body 1071 may be a buoyant or floatable body. The second body 1071 may be stabilized against the bottom or floor of the body of water below the lifting arrangement 1020 using a second stabilizing arrangement.

[0277] 21a-22b show an exemplary embodiment of a second body 1071 onto which a floating / floating base or foundation body 1110 of the structure 1010 rests, is coupled and / or attached. In use, the second body 1071 is selectively submerged such that the floating base 1110 can be positioned above the submerged second body 1071. The base 1110 is then attached and / or coupled to the second body using a number of high mass beams 1101 and / or a superstructure 1102 such that the base 1110 is securely coupled to the second body 1071.

[0278] The second body 1071 may then be selectively buoyed (see Figures 22a and 22b), thereby lifting the base 1110 above the water level so that it can be transported to an assembly area.

[0279] 23a-d, there is shown a system according to a tenth embodiment of the present disclosure. In this example, the system is used to lift assembled column sections 1115, 1120 onto a floating base 1110 of a structure 1010 that rests on a second body 1071.

[0280] As described above with reference to Figures 21a-22b, the buoyant base 1110 is loaded onto the second body 1071 and transported to an assembly area. The second body 1071 is positioned below the elongated structure 1017a (see Figure 23a). The second body 1071 may then be selectively submerged (see Figure 23b) to be disposed on the seabed which stabilizes the second body 1071.

[0281] The lifting arrangement 1020 is used to lift the assembled column parts 1115, 1120 from the first body 1070 (see FIG. 23c) onto a floating base 1110 (see FIG. 23d) which is securely coupled to a stabilized second body 1071. The assembled column parts 1115, 1120 are then coupled to the floating base 1110. This process can then be repeated for additional parts of the structure 1010 (e.g., the nacelle 1125).

[0282] As additional portions of the structure 1010 are assembled, the second body 1071 may be selectively floated. In this example, the second body 1071 may then be positioned under the cantilevered portion of the elongated structure 1017a such that the multiple blades 1130, 1131, 1132 can be coupled onto the structure 1010 while the second body 1071 is floating, e.g., moored, anchored, etc. Alternatively, the second body 1071 can be selectively submerged under the cantilevered portion of the elongated structure 1017a such that it is stabilized on or against the ocean floor.

[0283] The present disclosure provides a method of deploying an apparatus 1005 for assembling a (floating / floating) offshore structure, such as a wind turbine, an (offshore) structure 1010, such as a wind turbine or a jacket. The method may comprise providing an apparatus 1005 according to the ninth aspect to or at an assembly area or location and deploying / erecting the apparatus 1005.

[0284] Providing the equipment 1005 to the assembly area may include the use of one or more vessels or barges 1100 .

[0285] Deploying / erecting the apparatus 1005 may include erecting the first erectable structure 1015 such that when erected, the first erectable structure 1015 stands / rests on the bottom of the body of water. An exemplary method of erecting the first erectable structure 1015 is described above with reference to Figures 1-3b of this disclosure.

[0286] Deploying / erecting the device 1005 includes erecting a second erectable structure 1016 such that, when erected, the second erectable structure 1016 stands / rests on the bottom of the body of water.

[0287] Erecting the second erectable structure 1016 may include coupling an end of each of the second plurality of legs 1033, 1034 in a hinged arrangement to a respective support structure, such as a mud mat 1038. Each of the second plurality of legs 1033, 1034 may be arranged to extend in a first direction in a first, or folded, or stowed, state.

[0288] Deploying / erecting the device may include transitioning the second erectable structure 1016 from a first or folded or stowed state to a second or extended state by rotating each of the second plurality of legs 1033, 1034 about a hinged arrangement such that each of the second plurality of legs 1033, 1034 is arranged to extend in a second direction, the second direction being more upright than the first direction.

[0289] Deploying / erecting the apparatus includes using one final lifting device, such as a lifting device coupled to the first erectable structure 1015 and / or the second erectable structure 1016, to lift the elongated structure 1017 / 1017a.

[0290] Deploying / erecting the device 1005 involves coupling the elongated structure 1016 to the first and second erectable structures 1015,1016.

[0291] It will be appreciated that the steps of this embodiment may be performed in a different temporal order than that described, for example, the second erectable structure 1016 may be erected before or after the first erectable structure 1015.

[0292] The present disclosure provides a method of assembling a structure or wind turbine, such as an offshore structure 1010, a wind turbine or a jacket. The method includes deploying an apparatus 1005 according to the method described above, disposing a first base or body 1070 in an assembly area substantially below at least a portion of a first erectable structure 1015, disposing a second base or body 1071 in an assembly area substantially below at least a portion of a second erectable structure 1016, and assembling the structure 1010 by configuring a lifting arrangement 1020 to lift components of the structure 1010 from the first base or body 1070 towards the second base or body 1071.

[0293] The first base or body 1070 may comprise a floating / buoyant barge or watercraft for transporting the components.

[0294] Disposing the first base or body 1070 in the assembly area may optionally include stabilizing the first base or body 1070 against the bottom or floor of the body of water below the lifting arrangement 1020.

[0295] Stabilizing the first base or body 1070 may include configuring a first stabilizing arrangement 1072, such as a jack, to limit movement of the first base or body 1070 relative to the water bottom or floor. Alternatively, stabilizing the first base or body 1070 may include anchoring the first base or body 1070 or coupling the first base or body to a mud mat 1038 associated with the first base or body 1070.

[0296] The second base or body 1071 may comprise a floating / buoyant vessel, such as a floater 1110 for a wind turbine, for supporting the assembled structure 1010.

[0297] Disposing the second base or body 1071 in the assembly area may optionally include stabilizing the second base or body against the bottom or floor of the body of water below the lifting arrangement 1020.

[0298] Stabilizing the second base or body 1071 may include disposing the second base or body 1071 on a grounded vessel. Alternatively, stabilizing the second base or body 1071 may include disposing the second base or body 1071 on a floatable vessel, disposing the second base or body 1071 on an ocean floor, or mooring the second base or body 1071.

[0299] It will be appreciated that the steps of this embodiment may be performed in a different temporal order than that described. For example, the second base or body 1071 may be disposed in the assembly area before or after the first base or body 1070.

[0300] In some embodiments, the first and / or second stabilizing arrangement may comprise at least one panel or member. At least one panel or member may comprise an expandable element. At least one panel or member, e.g., an expandable element, may comprise at least one layer of drop stitch material.

[0301] For example, a panel or stack of panels of drop stitch material may provide temporary buoyancy underneath the first or second body instead of (or in some exemplary embodiments, in addition to) using a barge or watercraft.

[0302] Advantageously, the use of drop stitch material may provide a means of having a controllable amount of air and therefore a controllable means of generating a stabilizing buoyancy.

[0303] In one example, an inflatable bag, the volume and / or pressure of which may be controlled, may be placed under a second base or body, e.g., under the hull of the floater 1110, and then inflated, thereby reducing the draft of the body, e.g., the floater 1110. The body may then be lowered to the seabed using variable buoyancy, e.g., in the same manner as a submersible barge.

[0304] That is, in an exemplary embodiment, the floater 1110 may be disposed on one or more expandable elements, such as an expandable element that includes a drop stitch material.

[0305] Optionally, stabilizing the second base or body may include controlling the volume or air within one or more inflatable elements disposed under and / or around at least a portion of the second base or body. For example, one or more inflatable elements, such as inflatable elements including drop stitch material, may be installed under the hull of the floater 1110, such as under each teg or spar of the floater 1110. In some examples, such inflatable elements may extend under and / or around at least a portion of the base or body, such as under and / or around a leg or spar of the floater 1110.

[0306] In some examples, the expandable element may be provided as a modular expandable element. In some examples, the expandable element may be provided as an assembly or stack of expandable elements, e.g., sub-elements. In some examples, the / each expandable element may be for a housing or substantially cup-shaped or receiving portion for receiving and / or holding and / or at least partially surrounding a leg or portion of a second body or base.

[0307] Although the present disclosure has been described with respect to preferred embodiments, it should be understood that these embodiments are merely examples and that the claims are not limited to these embodiments. Those skilled in the art may make modifications and substitutions in light of the present disclosure, which are considered to fall within the scope of the appended claims. Each feature disclosed or illustrated herein may be incorporated into any embodiment alone or in any suitable combination with any other feature disclosed or illustrated herein.

Claims

1. A device or apparatus for assembling an offshore structure, wind turbine and / or jacket in a water mass assembly area, wherein the apparatus is: A vertically erectable structure including a plurality of legs, the first end of which is attached to a connecting member, When the erectable structure is in an upright position, the lifting arrangement is connected to the lifting point directly below the connecting member. A device or apparatus comprising:

2. The connecting member includes the top of the erectable structure, The erectable structure is selectively movable between a folded state for transporting the erectable structure to the assembly area and the erected state. The device or apparatus according to claim 1, wherein the top portion is located above the center point of the erectable structure.

3. When erected, the device includes an assembly area below the lifted arrangement. The device or apparatus according to claim 1 or 2, wherein the assembly area is provided around the device or apparatus.

4. The device or apparatus according to claim 1 or 2, wherein the erectable structure can be assembled on-site.

5. The device or apparatus comprises a tripod configuration including three legs, The device or apparatus according to claim 1 or 2, wherein each of the legs is hinged to the connecting member at a first end, and each leg is selectively provided with a buoyant mud mat at a second end.

6. The lifting arrangement includes an arrangement for connecting or supporting the portion of the offshore structure to be lifted, The lifting arrangement comprises one or more hooks or shackles, The lifting arrangement comprises a single-point lifting arrangement, and / or The device or apparatus according to claim 1 or 2, wherein the lifting arrangement comprises one or more pulley arrangements.

7. One or more lines are provided between at least one of each of the plurality of legs, and the lines are adapted to connect to the load to be lifted by the lifting arrangement, and / or The device or apparatus according to claim 2, wherein a further line or cable is provided between adjacent legs at or near the distal end of the leg of the connecting member.

8. The device or apparatus according to claim 7, wherein further lines are provided at or near the ends of each leg, and these further lines extend horizontally so as to intersect below the top at the center point of the apparatus.

9. The device or apparatus according to claim 1 or 2, wherein in the upright state, the lifting point is configured to be static during the assembly of the offshore structure above the water mass below the lifting point.

10. A system for assembling an offshore structure including a wind turbine or jacket, comprising the device or apparatus described in claim 1 or 2, The system comprises a floating or buoyant body for transporting one or more parts of the structure to one / the assembly area, and / or The system is a system for assembling a structure, comprising one or more winches for controlling the lifting arrangement.

11. A method for deploying a device or apparatus for assembling a structure including a wind turbine, To provide the device or apparatus according to claim 1 or 2 in the assembly area, To deploy / erect the aforementioned device or apparatus A method for deploying a device or apparatus, including the deployment of such a device or apparatus.

12. The assembly location is the area of ​​water above the bottom or floor of the water mass. When the device or apparatus is erected, it stands / is set up on the bottom of the water mass. The top portion and the raised arrangement are located above the surface level of the water mass, and / or A method of deploying a device or apparatus according to claim 11, wherein the step of providing the device or apparatus to the assembly location includes the use of one or more vessels or barges to transport the device or apparatus or one or more parts / components together or individually.

13. A method for assembling an offshore structure including a wind turbine or jacket, Deploying the device or apparatus according to the method of claim 11, Transporting the first portion of the offshore structure to the assembly area, Using the aforementioned lifting arrangement, the first part is lifted, Transporting the floating / buoyant base or foundation body to the assembly area, The first portion of the offshore structure is connected to / clamped to the floating / buoyancy base or foundation body. A method for assembling offshore structures, including [the specified element].

14. The aforementioned method subsequently The steps include transporting further portions of the offshore structure to the assembly area, The steps include lifting the further portion using the lifting arrangement, The steps include transporting the floating / buoyant base to the assembly area, The steps include lowering and / or connecting the further portion of the offshore structure to the first portion of the offshore structure already provided on the floating / buoyant base, A method for assembling the offshore structure according to claim 13, including the following:

15. The aforementioned offshore structure is Column or tower and Nasser and, Multiple turbine blades and Includes a wind turbine having one or more of the following: A method for assembling an offshore structure according to claim 13, wherein the wind turbine comprises a given number of parts, and the assembly requires the same given number of lifts.

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