# US 2013/0152839 A1 · System of anchoring and mooring of floating wind turbine towers and corresponding methods for towing and erecting thereof

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- Number: US 2013/0152839 A1
- Document ID: US20130152839A1
- Status: Published application
- Kind: A1
- Application number: 13/707,913
- Filed: 2012-12-07
- Published: 2013-06-20
- Earliest claimed: 2011-12-15
- Assignees: Andreas Graf
- Inventors: Andreas Graf
- Web page: https://patentgrep.com/patent/US20130152839A1

## CPC

- B63B 21/50: Anchoring arrangements {or methods} for special vessels, e.g. for floating drilling platforms or dredgers
- B63B 43/06: using ballast tanks (conduits for emptying or ballasting B63B13/00)
- F03D 13/10: Assembly of wind motors; Arrangements for erecting wind motors
- F03D 13/25: specially adapted for offshore installation
- F03D 13/40: Arrangements or methods specially adapted for transporting wind motor components
- F05B 2240/93: on a structure floating on a liquid surface
- F05B 2240/95: offshore
- F05B 2240/96: as part of a wind turbine farm
- Y02E 10/72: Wind turbines with rotation axis in wind direction
- Y02E 10/727: Offshore wind turbines
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- B63B: SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING (arrangements of vessel ventilation, heating, cooling, or air-conditioning B63J2/00; floating substructures as supports of dredgers or soil-shifting machines E02F9/06)
- F03D: WIND MOTORS
- 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
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A system of floating and weight-stabilized wind turbine towers with separately floodable compartments and aerodynamic overwater encasement and the appertaining semisubmersible mooring structures including anchorage on the seabed, a horizontally floating underwater mooring meshwork and an actinomorphic buoy-cable-mooring to the wind turbine towers. Also, a method to transport wind turbine towers from the manufacturing plants on-shore to the final off-shore destination by towing the vented towers in a horizontal position with towboats. Further, a method to erect the wind turbine towers at the final destination, including the assembly of the wind turbines. The worldwide potentials of off-shore wind farming in deep waters to produce electricity in an ecologically and economically sound way in order both to satisfy men's requirements and to help to reduce the need to rely on critical fossil and nuclear resources being immense.

## Claims

### Claim 1

System of anchoring and mooring of floating wind turbine towers in waters typically deeper than 30 meters, forming a windpark-structure, comprising:
anchors, vertical mooring lines, border mooring lines, major buoys, a floating meshwork, and ropes.

### Claim 2 (depends on 1)

System according to claim 1, wherein each wind turbine tower comprises an upper part exposed to the winds, a submerged lower part or shaft, compartments, a sliding ring, a stabilizing bottom weight, an aerodynamic encasement with openings, a water-air-pipe system and connective valves.

### Claim 3

Method for towing the wind turbine towers with one single or several vented compartments in horizontal position with towboats from on-shore construction and assembling sites to the off-shore sites of electricity production.

### Claim 4

Method for erecting wind turbine towers at a final destination by flooding successively one or more compartments, starting with a compartment next to a lower end respectively next to a stabilizing bottom weight of a shaft, until an upper part of each wind turbine tower reaches a working level from which the entire nacelle is mounted to a top end of the respective wind turbine tower and from which also blades are fixed.

### Claim 5 (depends on 4)

Method according to claim 4, further comprising the following step: after having fully assembled the wind power station one or more compartments are at least partially vented until the wind power station reaches its final operational position to produce electrical energy.

### Claim 6 (depends on 1)

System according to claim 1 further including signal buoys.

### Claim 7 (depends on 1)

System according to claim 1 wherein the ropes have weights.

### Claim 8 (depends on 2)

System according to claim 2 wherein the compartments includes a center compartment.

### Claim 9 (depends on 3)

Method according to claim 3 wherein the compartments includes a center compartment.

### Claim 10 (depends on 4)

Method according to claim 4 wherein the final destination is an off-shore site of electricity production.

### Claim 11 (depends on 5)

Method according to claim 5 wherein there are plural compartments and more than one compartment is vented.

### Claim 12 (depends on 5)

Method according to claim 5 wherein at least one compartment is fully vented.

### Claim 13 (depends on 5)

Method according to claim 5 wherein a water level in at least one compartment is above a surrounding water level and the water within the at least one compartment is simply being released.