NO20230328A1 - Submerged retrievable swivel for a floating structure, such as a floating windmill - Google Patents
Submerged retrievable swivel for a floating structure, such as a floating windmill Download PDFInfo
- Publication number
- NO20230328A1 NO20230328A1 NO20230328A NO20230328A NO20230328A1 NO 20230328 A1 NO20230328 A1 NO 20230328A1 NO 20230328 A NO20230328 A NO 20230328A NO 20230328 A NO20230328 A NO 20230328A NO 20230328 A1 NO20230328 A1 NO 20230328A1
- Authority
- NO
- Norway
- Prior art keywords
- swivel
- floating
- cables
- encapsulation
- anchoring
- Prior art date
Links
- 238000007667 floating Methods 0.000 title claims description 59
- 238000005538 encapsulation Methods 0.000 claims description 28
- 238000004873 anchoring Methods 0.000 claims description 21
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 230000000284 resting effect Effects 0.000 claims description 4
- 238000009360 aquaculture Methods 0.000 claims description 3
- 244000144974 aquaculture Species 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 241000972773 Aulopiformes Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 235000019515 salmon Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/502—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/507—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/50—Maintenance or repair
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
- B63B22/02—Buoys specially adapted for mooring a vessel
- B63B2022/028—Buoys specially adapted for mooring a vessel submerged, e.g. fitting into ship-borne counterpart with or without rotatable turret, or being releasably connected to moored vessel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
- B63B22/02—Buoys specially adapted for mooring a vessel
- B63B22/021—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
- F03D13/256—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation on a floating support, i.e. floating wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/93—Mounting on supporting structures or systems on a structure floating on a liquid surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/95—Mounting on supporting structures or systems offshore
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
Landscapes
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ocean & Marine Engineering (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Wind Motors (AREA)
Description
Submerged retrievable swivel for a floating structure, such as a floating windmill
Technical Field
The present invention relates to floating structures in general and floating windmills, containing a swivel that is submerged, wherein the swivel is part of an anchoring system or -arrangement and is coupled to a rotatable structure floating above the swivel, such as a windmill, and a fixed structure below the swivel, such as anchoring or a lower part of an anchoring system. The function of the swivel is to take up rotational movements as the floating structure weathervanes, providing rotatable electric coupling and/or fluid coupling and/or optical coupling.
Background Art
The typical floating windmill design involves a swivel in the nacelle, above sea level. The underlying problem of the present invention is thereby not relevant for the typical windmill design. Floating windmills are alternatively termed floating wind turbines.
However, at least one floating windmill design exists with the swivel submerged in normal operational mode. More specifically, said windmill is as described and illustrated in international patent publication WO2021251830A1, to which reference is made.
The floating windmill according to WO2021251830A1 comprises a floating element and a wind turbine. Said floating windmill is distinguished in that it further comprises:
a tension leg, an anchoring, a buoyancy element, a swivel and a cross bar, wherein the swivel is arranged in the buoyancy element,
wherein the floating windmill in operation is configured with the wind turbine in an upper end of the floating element extending up above the sea level, with a lower end or part of the floating element submerged in the sea, with the cross bar in one end connected to the lower part or end of the floating element and in the opposite end connected to the buoyancy element, with the buoyancy element fully submerged, preferably at safe draught depth below surface for service vessels and/or marine transport ships, with the tension leg arranged between the buoyancy element and the anchoring on the seabed, wherein the floating element with the wind turbine in the upper end can weathervane freely around the buoyancy element, wherein in a low force condition when the forces by ocean current, wind and waves are low the floating element, the buoyancy element and the tension leg is oriented in substance in vertical direction and the cross bar is oriented in substance in horizontal direction, wherein in a high force condition when the forces by ocean current, wind and waves are high the shape of the floating element, cross bar, buoyancy element and tension leg is stretched by the forces to provide a shape like a lazy-s configuration, which change in shape and dynamic behavior reduce extreme stress levels.
The swivel is arranged in the fully submerged and relatively stationary and nonrotating buoyancy element of the floating windmill according to international patent publication WO2021251830A1. A severe problem may occur if malfunction or damage occur in the submerged swivel, since retrieval of the buoyancy element, connected by one or more tension legs to the stationary anchoring, can be challenging and require a large operation at sea, since the tension leg coupling must be released or be easily length adjustable while full control and safety are ensured. Failure can be catastrophic for surface vessels involved if the submerged buoyancy structure with swivel floats up uncontrolled at high speed.
Furthermore, other floating structures can have a submerged swivel operatively arranged for taking up rotation due to weathervaning. Some such other structures are described in WO2021251830A1, more specifically energy islands, energy hubs and floating infrastructure hubs. At least one turret or turret-like structure exists that is fully submerged in operation, namely the Subsea Loading System of OneSubsea. With such turret-like structure, the ship can be coupled only to a loading hose or umbilical, instead of being coupled by taking the turret into an opening (moonpool) in the ship hull or a seat in the bow of the ship.
A submerged tension leg structure cannot easily be brought up to surface and further up on deck of a service vessel. For all embodiments with a submerged swivel taking up rotation when the structure above weathervanes, wherein the swivel is operatively arranged in a submerged buoyancy structure that typically is part of a tension leg arrangement, a demand exists for facilitating and reducing or eliminating any risk or problem with retrieval and service or replacement of the swivel.
Also swivels that are submerged but arranged otherwise than in a tension leg structure can cause risk or problems with respect to malfunction, service or replacement.
A demand exists for reducing or eliminating the problem described above.
Summary of invention
The invention meets the demand by providing a submerged retrievable swivel for a floating windmill or other floating structure.
The invention provides a swivel or a swivel arrangement for a floating structure that can weathervane freely on the surface, such as a floating windmill, arranged in a buoyancy element or another part in a floating windmill or an anchoring system thereof, or other floating structure arrangement or anchoring system wherein the floating structure on the surface can weathervane freely, wherein the swivel is submerged when in normal operation. The swivel, or the swivel arrangement, is distinguished in that it is arranged in an encapsulation, wherein the encapsulation is filled with oil or other liquid or gas,
wherein the encapsulation in an end or side to face downwards during operation comprises slots, guideposts and/or has a shape that is non-circular, and
wherein the buoyancy element or another part includes a seat with structure or shape matching said slots, guideposts and/or non-circular shape of the encapsulation, for receiving the encapsulation as non-rotatable in the seat as resting by gravity, wherein the seat is open in upwards direction,
wherein the encapsulation is coupled to one or more cables or lines on the side or end facing downwards and one or more cables or lines on the side facing upwards when in operation, wherein the cables or lines in downwards and upwards direction are arranged with sufficient slack or with controlled retrieval-release to allow lifting of the swivel from the seat to a position on deck on a service vessel.
The submerged swivel can relatively easily be retrieved and then deployed by the slack and/or controlled release-retrieval, allowing easier maintenance and service and replacement of the swivel or components thereof without a relatively larger, much more expensive and risky operation.
A releasable locking mechanism is preferably arranged operatively to the seat for releasable locking of the encapsulation into the seat when inserting the encapsulation into the seat. The releasable locking mechanism is preferably a spring loaded or actuated structure, such as a hinge or lever insertable into a slot or groove in the encapsulation.
Preferably, the swivel is arranged with slack and/or retrieval-release of the cables or lines of about 20, 30, 40, 50 m or more, both for cables or lines facing upwards and downwards. If the swivel is at operational depth of 20 m below surface, at safe depth for service vessels and transport vessels, and the freeboard of the service vessel is for example 15 m, sufficient slack or controlled retrieval-release can be 40 m. For swivel embodiments having tension leg anchoring that can be adjusted for allowing the swivel to come controlled up to the sea surface, the freeboard of the service vessel and some additional length is required, for example 20 m or 30 m slack is sufficient. For swivel embodiments only transferring electricity, or electricity and optical signals, it can be preferable to include spring loaded drums or similar for release-retrieval allowance, wherein the required lengths of lines or cable are arranged on said drums. An additional swivel can be required in the centre of said drums. Release-retrieval means a drum or similar, preferably spring loaded or similar, for controlled retrieval onto and release from the drum. Slack and retrieval release mechanisms can also be combined.
Most preferably, sufficient slack is provided for cables or lines. For the windmill swivels, sufficient slack must be provided on both downward and upward facing cables and lines, while for a fully submerged turret it can be sufficient with slack only for the cables and lines facing downward from the swivel.
Preferably, the swivel is a stack of electrical swivel, with slip rings and/or inductive couplings, and preferably also fibreoptic swivel and fluid swivel, wherein electrical cables and/or optical fibres and/or fluid pipes or hoses are arranged separately or combined in one or two combined cables or lines or umbilicals.
The term cables and lines include all variations of electrical cables, optical fibres and fluid pipes, lines or hoses, and said variations can be bundled together and/or arranged in an umbilical in any combination.
A feasible swivel arranged in an encapsulation, being leakage proof and filled with oil or other liquid or gas, can be designed and built for each project. In general, several commercial suppliers can provide feasible swivels that can be modified or not and be arranged in a leakage proof and pressure and impact resistant encapsulation by following good subsea engineering practice. Some such suppliers are OneSubsea, DSTI (Dynamic Sealing Technologies), both US-based companies, and Sub Sea Services of Norway, and several other suppliers.
In a preferable embodiment, the swivel is arranged in a buoyancy element of a floating windmill according to WO2021251830A1.
In another preferable embodiment, the swivel is arranged in a fully submerged turret. In other preferable embodiments, the swivel is part of, or part of an anchoring system for, an energy island, an energy hub, a floating infrastructure hub, an aquaculture plant or -system. An example of aquaculture plant is an offshore salmon farm, wherein the swivel comprises a hose for oxygen, a hose for food supply, cables for electric power and control, and preferably also fiber optics and/or return hoses for surplus food/feces, which represents a preferable embodiment of the present invention.
A further subject matter of the invention is a floating windmill. The floating windmill comprises a floating element and a wind turbine, a tension leg, an anchoring, a buoyancy element, a swivel and a cross bar, wherein the swivel is arranged in the buoyancy element,
wherein the floating windmill in operation is configured with the wind turbine in an upper end of the floating element extending up above the sea level, with a lower end or part of the floating element submerged in the sea, with the cross bar in one end connected to the lower part or end of the floating element and in the opposite end connected to the buoyancy element, with the buoyancy element fully submerged, preferably at safe draught depth below surface for service vessels and/or marine transport ships, with the tension leg arranged between the buoyancy element and the anchoring on the seabed, wherein the floating element with the wind turbine in the upper end can weathervane freely around the buoyancy element, wherein in a low force condition when the forces by ocean current, wind and waves are low the floating element, the buoyancy element and the tension leg is oriented in substance in vertical direction and the cross bar is oriented in substance in horizontal direction, wherein in a high force condition when the forces by ocean current, wind and waves are high the shape of the floating element, cross bar, buoyancy element and tension leg is stretched by the forces to provide a shape like a lazy-s configuration, which change in shape and dynamic behavior reduce extreme stress levels, wherein the floating windmill is distinguished in that: the swivel is arranged in an encapsulation, filled with oil or other liquid or gas,
wherein the encapsulation in an end or side to face downwards during operation comprises slots, guideposts and/or has a shape that is non-circular, and
wherein the buoyancy element or another part includes a seat with structure or shape matching said slots, guideposts and/or non-circular shape of the encapsulation, for receiving the encapsulation as non-rotatable in the seat as resting by gravity, preferably lockable by a releasable locking mechanism, wherein the seat is open in upwards direction,
wherein the encapsulation is coupled to one or more cables or lines on the side or end facing downwards and one or more cables or lines on the side facing upwards when in operation, wherein the cables or lines in downwards and upwards direction are arranged with sufficient slack or with controlled retrieval-release to allow lifting of the swivel from the seat to a position on deck on a service vessel.
A further subject matter of the invention is a fully submerged turret, or turret-like structure, coupled to an anchoring system, preferably by a tension leg coupling, and at least one umbilical, hose, cable and/or line on the side facing downwards during operation, and a loading or unloading umbilical, hose, cable and/or line and preferably vessel anchoring structure, on the side facing upwards to a vessel during operation, distinguished in that the turret comprises:
a swivel arranged in an encapsulation, filled with oil or other liquid or gas,
wherein the encapsulation in an end or side to face downwards during operation comprises slots, guideposts and/or has a shape that is non-circular, and
wherein the buoyancy element or another part includes a seat with structure or shape matching said slots, guideposts and/or non-circular shape of the encapsulation, for receiving the encapsulation as non-rotatable in the seat as resting by gravity, preferably lockable by a releasable locking mechanism, wherein the seat is open in upwards direction,
wherein the encapsulation is coupled to at least one umbilical, hose, cable and/or line on the side or end facing downwards and at least one umbilical, hose, cable and/or line on the side facing upwards when in operation, wherein the umbilicals, hoses, cables or lines in downwards and preferably or optionally also in upwards direction are arranged with sufficient slack or with controlled retrieval-release to allow lifting of the swivel from the seat to a position on deck on a service vessel. The umbilical or hose, for embodiments for unloading or loading of fluid, can preferably be a flexible pipe or umbilical arranged in a s-configuration with additional slack, preferably with reduced stiffness, or be a rigid pipe or umbilical section, preferably entering the turret in substance vertically from below. The turret or turret-like structure preferably comprises a crossbar, to which upwards umbilical, hose, cable and/or line are arranged, together or not with additional coupling and/or anchoring structure for coupling and decoupling a ship for loading and unloading, preferably with an outer end of the crossbar retrievable into a seat on a floating structure, for example in the bow of a ship.
Brief description of drawings
Figures 1-5 illustrate embodiments and/or details of the swivel of the invention and a floating windmill of the invention.
Detailed description of the invention
Reference is made to Figures 1-5, illustrating embodiments of a swivel 2 of the invention, and a floating windmill 1 of the invention.
As clearly visible in most Figures, slack is arranged in an umbilical 7 coupled to the swivel, as slack on the side facing upwards 3a and slack in the side facing downwards 3b.
Figure 1 illustrates a buoyancy element 4 in a floating windmill 1 of the invention, as viewed obliquely from above, with slack 3a and 3b clearly visible. The Figures 2 and 3 illustrate the buoyancy element as seen from the side and as seen in longitudinal section, respectively. Item 5 is a cross bar, in the end thereof coupled to the buoyancy element. Items 6 are tension legs, rigid or flexible. Item 2 is the encapsulation, coupled to slack 3b in downward side and slack 3a in upward side as operationally positioned.
Figures 4 and 5 illustrate a floating windmill 1 of the invention, as viewed obliquely from above in Figure 5 and as viewed obliquely from below in Figure 5.
Claims (5)
1.
Swivel for a floating structure, such as a floating windmill, arranged in a buoyancy element or another part in a floating windmill or other floating structure or anchoring system thereof, wherein the swivel is submerged when in normal operation, c h a r a c t e r i s e d i n that
the swivel is arranged in an encapsulation, wherein the encapsulations is filled with oil or other liquid or gas,
wherein the encapsulation in an end or side to face downwards during operation comprises slots, guideposts and/or has a shape that is non-circular, and
wherein the buoyancy element or another part includes a seat with structure or shape matching said slots, guideposts and/or non-circular shape of the encapsulation, for receiving the encapsulation as non-rotatable in the seat as resting by gravity, wherein the seat is open in upwards direction,
wherein the encapsulation is coupled to one or more cables or lines on the side or end facing downwards and one or more cables or lines on the side facing upwards when in operation, wherein the cables or lines in downwards and upwards direction are arranged with sufficient slack or with controlled retrieval-release to allow lifting of the swivel from the seat to a position on deck on a service vessel.
2.
Swivel according to claim 1, wherein the swivel is arranged with slack and/or release-retrieval of the cables or lines of about 40 m or more, both for cables or lines facing upwards and downwards.
3.
Swivel according to claim 1 or 2, wherein the swivel comprises a stack of electrical swivel, with slip rings and/or inductive couplings, and/or fibreoptic swivel and/or fluid swivel, wherein electrical cables and/or optical fibres and/or fluid pipes or hoses are arranged separately or combined in one or two combined hoses, cables or umbilicals.
4.
Swivel according to claim 1, wherein the swivel is a component of and is arranged in a buoyancy element of a floating windmill according to WO2021251830A1.
5.
Use of a swivel according to any one of claim 1-3, for a floating structure that can weathervane freely as floating on the surface, for a floating windmill or anchoring thereof, an energy island or anchoring thereof, an energy hub or anchoring thereof, a floating infrastructure hub or anchoring thereof, an aquaculture plant or -system or anchoring thereof, or in a fully submerged turret.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20230328A NO20230328A1 (en) | 2023-03-24 | 2023-03-24 | Submerged retrievable swivel for a floating structure, such as a floating windmill |
| PCT/NO2024/050076 WO2024205418A1 (en) | 2023-03-24 | 2024-03-22 | Anchoring system with a submerged retrievable swivel for a floating structure or a submerged structure, and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20230328A NO20230328A1 (en) | 2023-03-24 | 2023-03-24 | Submerged retrievable swivel for a floating structure, such as a floating windmill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO20230328A1 true NO20230328A1 (en) | 2024-09-25 |
Family
ID=92907228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20230328A NO20230328A1 (en) | 2023-03-24 | 2023-03-24 | Submerged retrievable swivel for a floating structure, such as a floating windmill |
Country Status (2)
| Country | Link |
|---|---|
| NO (1) | NO20230328A1 (en) |
| WO (1) | WO2024205418A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119940202B (en) * | 2025-01-03 | 2025-09-02 | 哈尔滨工业大学（威海） | Numerical prediction method, storage medium and equipment for dynamic response of flexible pipe of full-scale floating tunnel under vertical-inclined combined anchor mooring |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010071433A2 (en) * | 2008-12-18 | 2010-06-24 | Single Buoy Moorings Inc. | Removable offshore wind turbines with pre-installed mooring system |
| EP2398695A2 (en) * | 2009-02-20 | 2011-12-28 | Mooring Systems Limited | Deep water and ultra deep water mooring system |
| US20160075413A1 (en) * | 2013-04-30 | 2016-03-17 | Acs Servicios, Comunicaciones Y Energia S.L. | Submersible active support structure for turbine towers and substations or similar elements, in offshore facilities |
| EP3527821A1 (en) * | 2018-02-16 | 2019-08-21 | Siemens Gamesa Renewable Energy A/S | An offshore arrangement, a connecting device, and a method for providing an electrical offshore connection |
| US20200271086A1 (en) * | 2012-05-08 | 2020-08-27 | Rohrer Technologies, Inc. | Cantilevered tension-leg stabilization of buoyant wave energy converter or floating wind turbine base |
| NO20200689A1 (en) * | 2020-06-11 | 2021-12-13 | ||
| NO20201030A1 (en) * | 2020-09-18 | 2022-03-21 | Fred Olsen Ocean Ltd | Wind turbine with floating foundation |
| WO2022229699A1 (en) * | 2021-04-26 | 2022-11-03 | Acergy France SAS | Mooring renewable energy systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS59182493U (en) * | 1983-05-25 | 1984-12-05 | 三菱重工業株式会社 | mooring device |
| EP2404821A1 (en) * | 2010-07-07 | 2012-01-11 | Single Buoy Moorings Inc. | Method for replacing an outer annular ring of a fluid swivel and a fluid swivel |
| SE537490C2 (en) * | 2012-12-13 | 2015-05-19 | Flowocean Ltd | Mooring buoy |
| KR101608002B1 (en) * | 2014-09-25 | 2016-04-12 | 삼성중공업 주식회사 | Low profile multi-path swivel |
| CN115610605A (en) * | 2022-10-28 | 2023-01-17 | 上海交通大学 | A yaw correction device for turret mooring non-yaw floating wind turbines |
-
2023
- 2023-03-24 NO NO20230328A patent/NO20230328A1/en unknown
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2024
- 2024-03-22 WO PCT/NO2024/050076 patent/WO2024205418A1/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010071433A2 (en) * | 2008-12-18 | 2010-06-24 | Single Buoy Moorings Inc. | Removable offshore wind turbines with pre-installed mooring system |
| EP2398695A2 (en) * | 2009-02-20 | 2011-12-28 | Mooring Systems Limited | Deep water and ultra deep water mooring system |
| US20200271086A1 (en) * | 2012-05-08 | 2020-08-27 | Rohrer Technologies, Inc. | Cantilevered tension-leg stabilization of buoyant wave energy converter or floating wind turbine base |
| US20160075413A1 (en) * | 2013-04-30 | 2016-03-17 | Acs Servicios, Comunicaciones Y Energia S.L. | Submersible active support structure for turbine towers and substations or similar elements, in offshore facilities |
| EP3527821A1 (en) * | 2018-02-16 | 2019-08-21 | Siemens Gamesa Renewable Energy A/S | An offshore arrangement, a connecting device, and a method for providing an electrical offshore connection |
| NO20200689A1 (en) * | 2020-06-11 | 2021-12-13 | ||
| NO20201030A1 (en) * | 2020-09-18 | 2022-03-21 | Fred Olsen Ocean Ltd | Wind turbine with floating foundation |
| WO2022229699A1 (en) * | 2021-04-26 | 2022-11-03 | Acergy France SAS | Mooring renewable energy systems |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024205418A1 (en) | 2024-10-03 |
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