GB2365905A - Offshore structure with a telescopically extendable column - Google Patents

Offshore structure with a telescopically extendable column Download PDF

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Publication number
GB2365905A
GB2365905A GB0027868A GB0027868A GB2365905A GB 2365905 A GB2365905 A GB 2365905A GB 0027868 A GB0027868 A GB 0027868A GB 0027868 A GB0027868 A GB 0027868A GB 2365905 A GB2365905 A GB 2365905A
Authority
GB
United Kingdom
Prior art keywords
wind turbine
shaft
support structure
general equipment
equipment installation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0027868A
Other versions
GB2365905B (en
GB0027868D0 (en
Inventor
David Bone
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ocean Technologies Ltd
Original Assignee
Ocean Technologies Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ocean Technologies Ltd filed Critical Ocean Technologies Ltd
Publication of GB0027868D0 publication Critical patent/GB0027868D0/en
Publication of GB2365905A publication Critical patent/GB2365905A/en
Application granted granted Critical
Publication of GB2365905B publication Critical patent/GB2365905B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • E02B17/027—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto steel structures
    • 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0065—Monopile structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0091—Offshore structures for wind turbines
    • 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
    • F05B2240/91—Mounting on supporting structures or systems on a stationary structure
    • F05B2240/915—Mounting on supporting structures or systems on a stationary structure which is vertically adjustable
    • F05B2240/9151—Mounting on supporting structures or systems on a stationary structure which is vertically adjustable telescopically
    • 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
    • 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
    • Y02E10/728—Onshore wind turbines

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Wind Motors (AREA)

Abstract

An offshore structure comprises a watertight chamber 1 having a base 5 which rests on the seabed and a telescopically extendable shaft 3 which extends upwardly from the chamber, with a hoist 7 located at the shaft top. A wind turbine 6 may be located at the top of the shaft while a generator may be located in the base. The structure may be towed floating with the column retracted to its installation point, where the base is then ballasted to its resting position on the seabed. The column may then be extended and grouted in place, while the hoist may be used to raise the rotor hub and blades 8 to the required position at the top of the column.

Description

<Desc/Clms Page number 1> OFFSHORE WINDTOWER This invention relates to offshore foundation structures for wind turbines.
Currently the foundation structures used for housing wind turbines offshore require that the turbine is fixed to the foundation prior to installation or that the foundation is pre-installed and the turbine fixed to it in a separate operation. A disadvantage of the first method of installation is that the turbine height above the foundation causes poor stability and an eccentnc loading and instability resulting in complex and costly installation procedures. A disadvantage of the second method of installation is that the turbine has to be installed in-situ offshore requiring complex installation manoeuvres and additional floating vessels and resulting in additional costs.
We have now devised a foundation structure for offshore use with a wind turbine and installation method, which obviates the above problem.
According to the present invention there is provided a wind turbine or general equipment installation and support structure comprising a watertight chamber fon-ned of concrete, ferrous cement, fibre-reinforced concrete or other suitable material, having a base which rests on or at the lake or seabed, and a shaft which extends upwardly from the chamber, said shaft being telescopically extendable, with a hoist located at the shaft top.
Preferably a wind turbine is located at the top of the shaft prior to installation.
However, in alternative embodiments the structure can be used to install and support other equipment for use offshore, for example telecomm's equipment or pollution detection equipment.
Preferably a plurality of chambers forms the base, allowing for modular construction. Preferably the shaft is fully retracted during tow out, and foundation ballast and installation operations.
Preferably grout annuli are provided for locking the telescopic shaft into the fully extended position.
In one embodiment of the invention a generator is located in the base. This removes weight from the top of the structure and aids stability during tow out and installation.
During installation a rotor hub and blades are fixed to the structure subsequent to the foundation installation and to the shaft being extended.
In an alternative embodiment the rotor hub and blades are hinged to the top of the shaft at a horizontal angle enabling said hub and blades to be fitted to the structure prior to tow out and foundation installation. The hoist is then used to position the rotor hub and blades in the desired vertical position after foundation installation and shaft extension operations.
In another embodiment the blades are hinged to the rotor hub and a hydraulic jacking mechanism is provided such that the blades can be rotated into horizontal alignment. This
<Desc/Clms Page number 2>
ensures that the blades are clear of the water surface and allows them to be fitted to the structure pnor to tow out and installation. After installation and shaft extension the blades are rotated into the desired alignment by releasing the hydraulic Jacks.
A specific embodiment of the invention will now be described by way of example only and with reference to the accompanying drawings in which: - I Figure I shows in vertical cross section the wind turbine or general equipment support structure on location with the shaft fully extended.
Figure 2 shows in vertical cross section the wind turbine or general equipment support structure on location with the shaft fully retracted.
Figure 3 shows a typical base layout in plan view.
Figure 4 shows connection details for the telescopic shaft sections.
Referring to the drawings the structure comprises a watertight chamber, 1, which is formed to include a tubular opening, 2, to allow for insertion of a telescopic shaft, 3. A cone reducer, 4, is used to lessen wind and wave loading on the Chamber, 1.
A plurality of peripheral compartments, 5, are filled with ballast during non-nal operation but can be fully or partly air-filled duning installation, in order to provide flotation and stability. Should removal be desired the compartments, 5, can also be deballasted.
The peripheral compartments, 5, provide a sufficiently large bearing area on the seabed to ensure stability in good seabed conditions. Should other seabed conditions be encountered provision is made for other types of fixity (not shown) including, pin piled, suction piled, and epoxy grout.
Figure 2 shows the structure on location after it has been ballasted to the seabed with the shaft, 3, in fully retracted position. A turbine package 6, is located at the top of the shaft, 3. The structure is set up for operation by extending the telescopic shaft, 3, to its fully extended position as shown in Figure 1. Once the shaft 3, has been locked in position a hoist, 7, located at the top of the shaft, 3, is used to lift and install the rotor hub and blades, S. Platforms, 18, are provided for access to grout operations, for ease of maintenance, and checks.
In an alternative embodiment the rotor hub and blades, 8,are hinged (not shown) to the top of the shaft, 3, at a horizontal angle prior to installation and tow out of the foundation.
The telescopic shaft, 3, is raised using a j acking system with frame and pins (not shown) or by pressurising the chamber, 1, interior and pumping, (not shown). In an alternative embodiment (not shown) the tubular opening, 2, extends to the chamber, 1, bottom so that pressure can be applied within the opening, 2, to raise the shaft, 3.
Figure 4 shows how the shaft sections, 3, are held in alignment as the shaft, 3, is raised to the extended position. This is achieved using alignment rollers, 13 (four shown) and the
<Desc/Clms Page number 3>
alignment/ retaining plates, 9, (four shown). The alignment/retaining plates, 9, are held in place with galvanised locking rings, 17.
On reaching the desired position the telescopic shaft sections, 3, are held temporarily by screwing in the alignment/ retaining plates, 9, so that the sections, 3, can be grouted in place. Stops, 10, ensure that the telescopic shaft, 3 is not over extended. The grout is passed through a grout fill line, 11, into a grout space, 12, and hardens to fix the shaft, 3, in position. The grout is retained using neoprene wiper seals, 14, (four shown), secured by retaining rings, 15, A weep hole, 16, is provided at the top of the connection.
<Desc/Clms Page number 4>

Claims (19)

  1. CLAIMS I . A wind turbine or general equipment installation and support structure comprising a watertight chamber formed of concrete, ferrous cement, fibre-rein forced concrete or other suitable material, having a base which rests on or at the lake or seabed, and a shaft which extends upwardly from the chamber, said shaft being telescopically extendable, with a hoist located at the shaft top.
  2. 2. A wind turbine or general equipment installation and support structure as claimed in Claim I wherein a wind turbine is located at the top of the shaft.
  3. 3. A wind turbine or general equipment installation and support structure as claimed in Z:1 Claim I or Claim 2, wherein a plurality of chambers forms the base, allowing for modular construction.
  4. 4. A wind turbine or general equipment installation and support structure as claimed in any preceding claim, wherein the shaft is fully retracted during tow out, and during foundation ballast and installation operations.
  5. 5. A wind turbine or general equipment installation and support structure as claimed in any preceding claim, wherein grout annuli are provided between shaft sections, allowing grouting for locking the telescopic shaft into the fully extended position.
  6. 6. A wind turbine or general equipment installation and support structure as claimed in any preceding claim, wherein a generator is located in the base.
  7. 7. A wind turbine or general equipment installation and support structure as claimed in any preceding claim, wherein a rotor hub and blades are fixed to the structure during installation subsequent to the foundation installation and to the shaft being extended.
  8. 8. A wind turbine or general equipment installation and support structure as claimed in any of claims I to 6, wherein a rotor hub and blades are hinged to the top of the shaft at a horizontal angle enabling said hub and blades to be fitted to the structure prior to tow out and foundation installation.
  9. 9. A wind turbine or general equipment installation and support structure as claimed in any of claims I to 6, wherein the blades are hinged to the rotor hub and a hydraulic Jacking mechanism is provided such that the blades can be rotated into horizontal alignment, thereby ensuring that the blades are clear of the water surface and allowing them to be fitted to the structure prior to tow out and installation, and subsequently rotated into the desired alignment.
  10. 10. A wind turbine or general equipment installation and support structure as claimed in Claim 8 wherein a hoist is used to position the rotor hub and blades in the desired vertical position after foundation installation and shaft extension operations.
  11. 11. A wind turbine or general equipment installation and support structure as claimed in any preceding claim, wherein the peripheral compartments are filled with ballast during
    <Desc/Clms Page number 5>
    normal operation, and can be fully or partly air-filled during, installation, in order to provide flotation and stability.
  12. 12. A wind turbine or general equipment installation and support structure as claimed in Claim I I wherein the peripheral compartments can be deballasted to aid removal of the structure from the seabed,
  13. 13. A wind turbine or general equipment installation and support structure as claimed in any preceding claim, wherein the structure is fixed to the seabed by use of pin piles, suction piles, epoxy grout, or other suitable fastening.
  14. 14. A wind turbine or general equipment installation and support structure as claimed in any preceding claim, wherein the telescopic shaft is raised using a jacking system with frame and pins.
  15. 15. A wind turbine or general equipment installation and support structure as claimed in any of claims I to 13, wherein the telescopic shaft is raised by pressunising the chamber interior and pumping, a tubular opening housing the shaft and extending to the chamber bottom so that pressure can be applied within the opening to raise the shaft.
  16. 16. A wind turbine or general equipment installation and support structure as claimed in any preceding claim, wherein the shaft sections are held in alignment as the shaft is raised to the extended position, using alignment rollers and alignment/ retaining plates, said plates being held in place with galvanised locking rings.
  17. 17. A wind turbine or general equipment installation and support structure as claimed in any preceding claim, wherein the telescopic shaft sections can be held temporarily in the raised position by screwing in the aligm-nent/ retaining plates so that the shaft sections can be grouted in place.
  18. 18. A wind turbine or general equipment installation and support structure as claimed in any preceding claim, wherein the grout is retained using neoprene wiper seals, said seals being secured by retaining rings attached to the shaft.
  19. 19. A wind turbine or general equipment installation and support structure substantially as herein described and illustrated in the accompanying drawings.
GB0027868A 2000-08-19 2000-11-15 Offshore windtower Expired - Fee Related GB2365905B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0020410.7A GB0020410D0 (en) 2000-08-19 2000-08-19 Offshore windtower

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GB0027868D0 GB0027868D0 (en) 2000-12-27
GB2365905A true GB2365905A (en) 2002-02-27
GB2365905B GB2365905B (en) 2003-05-14

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003004870A1 (en) * 2001-07-06 2003-01-16 Saipem Sa Offshore wind turbine and method for making same
GB2378679A (en) * 2001-08-16 2003-02-19 Technologies Ltd Ocean Floating offshore wind turbine
NL1020345C2 (en) * 2001-12-17 2003-06-18 Ballast Nedam Eng Wind turbine, has adjustable distance between gondola and part for connecting mast to foundation
GB2388164A (en) * 2002-02-28 2003-11-05 Technologies Ltd Ocean Intermediate booster pumping station
FR2849877A1 (en) * 2003-01-09 2004-07-16 Saipem Sa Windmill installing process, involves moving windmill with tower until base of tower in axis of pile foundation, integrating base of tower with top of foundation, and deploying tower until its configuration is deployed
GB2398543A (en) * 2003-02-21 2004-08-25 Ocean Synergy Ltd Variable buoyancy device for an offshore structure
GB2401387A (en) * 2003-05-08 2004-11-10 Alexander Terrell Adjustable offshore wind tower foundation
WO2005107425A2 (en) * 2004-05-06 2005-11-17 Grand Vent Power, L.L.C. Offshore windmill electric generator
EP1634998A1 (en) * 2004-09-08 2006-03-15 Maierform Maritime Technology GmbH Transport and foundation of functional units, in particular offshore wind turbines.
GB2427003A (en) * 2005-06-06 2006-12-13 Steven Peace Portable renewable energy apparatus
EP1777348A1 (en) 2005-10-21 2007-04-25 Dredging International N.V. Device and method for offshore installations
US20080232965A1 (en) * 2003-12-20 2008-09-25 Marine Current Turbines Limited Articulated False Seabed
WO2009005357A1 (en) * 2007-06-29 2009-01-08 Seatower As Device and method for marine tower structure
NL2003012C2 (en) * 2009-06-12 2010-12-15 D E M E N V Hybrid offshore large pile - gravity foundation for constructions, and installation method therefor.
NO20100154A1 (en) * 2010-02-01 2011-03-21 Dag Velund Device and method of floating wind turbine
WO2011070190A1 (en) * 2009-12-11 2011-06-16 Grupo De Ingeniería Oceánica, S.L. Multi-purpose ocean platform, and production and installation method thereof
CN102213193A (en) * 2010-02-02 2011-10-12 西门子公司 Support structure for supporting an offshore wind turbine
WO2012010847A1 (en) 2010-07-23 2012-01-26 Paul A. Frieze & Associates Ltd. Support structure for an offshore wind turbine
US20120045345A1 (en) * 2010-08-20 2012-02-23 Horton Wison Deepwater, Inc. Offshore wind turbine and methods of installing same
CN102619227A (en) * 2011-01-31 2012-08-01 华锐风电科技(江苏)有限公司 Grouting device, assembly and grouting method for single pipe pile foundation of offshore wind turbine generating set
WO2013057459A1 (en) * 2011-10-20 2013-04-25 Crux Products Limited Monopile transition piece
WO2013120264A1 (en) * 2012-02-16 2013-08-22 Wong Calos Buoyant supporting and fixing platform for supporting seaborne wind turbines, bridges, and marine structures
US8801330B2 (en) 2009-09-10 2014-08-12 National Oilwell Varco, L.P. Windmill installation system and method for using same
US20140311085A1 (en) * 2011-12-09 2014-10-23 Sea Wind Towers, S.L. Assembly process of a telescopic tower
US9650840B2 (en) 2015-04-27 2017-05-16 National Oilwell Varco, L.P. Method and apparatus for erecting a drilling rig
WO2018041663A1 (en) 2016-09-02 2018-03-08 National Oilwell Varco Norway As Method of building an offshore windmill
NO20181239A1 (en) * 2018-09-24 2020-03-25 Nat Oilwell Varco Norway As A method for installing an offshore wind turbine and a substructure for an offshore wind turbine
US20210231105A1 (en) * 2018-04-27 2021-07-29 Horton Do Brasil Tecnologia Offshore, Ltda. Offshore Wind Turbines and Methods for Deploying and Installing Same

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GB2327970A (en) * 1997-04-29 1999-02-10 Kvaerner Oil & Gas Ltd Method of installing a tower

Patent Citations (4)

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GB1334342A (en) * 1972-05-30 1973-10-17 Langner K E Telescopic caisson for sea or river bed exploration and drilling
GB2186901A (en) * 1986-02-24 1987-08-26 British Gas Plc Marine structure
DE4029932A1 (en) * 1990-09-21 1992-03-26 Siegfried Pretzsch Tube mast for wind generator - has telescopic components mounted on base and extendable or reducible manually or by motor drive
GB2327970A (en) * 1997-04-29 1999-02-10 Kvaerner Oil & Gas Ltd Method of installing a tower

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003004870A1 (en) * 2001-07-06 2003-01-16 Saipem Sa Offshore wind turbine and method for making same
GB2378679A (en) * 2001-08-16 2003-02-19 Technologies Ltd Ocean Floating offshore wind turbine
GB2378679B (en) * 2001-08-16 2005-05-18 Ltd Tamacrest Floating offshore windtower
NL1020345C2 (en) * 2001-12-17 2003-06-18 Ballast Nedam Eng Wind turbine, has adjustable distance between gondola and part for connecting mast to foundation
GB2388164A (en) * 2002-02-28 2003-11-05 Technologies Ltd Ocean Intermediate booster pumping station
GB2388164B (en) * 2002-02-28 2005-11-16 Ltd Tamacrest Intermediate booster pumping station
FR2849877A1 (en) * 2003-01-09 2004-07-16 Saipem Sa Windmill installing process, involves moving windmill with tower until base of tower in axis of pile foundation, integrating base of tower with top of foundation, and deploying tower until its configuration is deployed
WO2004070119A1 (en) 2003-01-09 2004-08-19 Saipem S.A. Method for offshore installation of a wind turbine
GB2398543B (en) * 2003-02-21 2006-05-17 Ocean Synergy Ltd Variable buoyancy device incorporated within an offshore support structure
GB2398543A (en) * 2003-02-21 2004-08-25 Ocean Synergy Ltd Variable buoyancy device for an offshore structure
GB2401387A (en) * 2003-05-08 2004-11-10 Alexander Terrell Adjustable offshore wind tower foundation
GB2401387B (en) * 2003-05-08 2005-06-15 Alexander Terrell Adjustable offshore wind turbine foundation
US20080232965A1 (en) * 2003-12-20 2008-09-25 Marine Current Turbines Limited Articulated False Seabed
US8579576B2 (en) * 2003-12-20 2013-11-12 Marine Current Turbines Limited Articulated false seabed
WO2005107425A2 (en) * 2004-05-06 2005-11-17 Grand Vent Power, L.L.C. Offshore windmill electric generator
WO2005107425A3 (en) * 2004-05-06 2006-12-21 Grand Vent Power L L C Offshore windmill electric generator
US7238009B2 (en) * 2004-05-06 2007-07-03 Grand Vent Power, Llc Offshore windmill electric generators
EP1634998A1 (en) * 2004-09-08 2006-03-15 Maierform Maritime Technology GmbH Transport and foundation of functional units, in particular offshore wind turbines.
GB2427003A (en) * 2005-06-06 2006-12-13 Steven Peace Portable renewable energy apparatus
GB2427003B (en) * 2005-06-06 2010-09-29 Steven Peace Renewable energy power unit
EP1777348A1 (en) 2005-10-21 2007-04-25 Dredging International N.V. Device and method for offshore installations
WO2009005357A1 (en) * 2007-06-29 2009-01-08 Seatower As Device and method for marine tower structure
EP2261425A1 (en) * 2009-06-12 2010-12-15 D.E.M.E. Nv Hybrid offshore large pile - gravity foundation for constructions, and installation method therefor
NL2003012C2 (en) * 2009-06-12 2010-12-15 D E M E N V Hybrid offshore large pile - gravity foundation for constructions, and installation method therefor.
US8801330B2 (en) 2009-09-10 2014-08-12 National Oilwell Varco, L.P. Windmill installation system and method for using same
WO2011070190A1 (en) * 2009-12-11 2011-06-16 Grupo De Ingeniería Oceánica, S.L. Multi-purpose ocean platform, and production and installation method thereof
ES2385509A1 (en) * 2009-12-11 2012-07-26 Grupo De Ingeniería Oceánica, S.L. Multi-purpose ocean platform, and production and installation method thereof
NO330281B1 (en) * 2010-02-01 2011-03-21 Dag Velund Device and method of liquid wind turbine
GB2489897A (en) * 2010-02-01 2012-10-10 Dag Velund An arrangement and a method in connection with a floating wind turbine
GB2489897B (en) * 2010-02-01 2016-05-04 Velund Dag An arrangement and a method in connection with a floating wind turbine
WO2011093725A1 (en) * 2010-02-01 2011-08-04 Dag Velund An arrangement and a method in connection with a floating wind turbine
NO20100154A1 (en) * 2010-02-01 2011-03-21 Dag Velund Device and method of floating wind turbine
CN102213193A (en) * 2010-02-02 2011-10-12 西门子公司 Support structure for supporting an offshore wind turbine
WO2012010847A1 (en) 2010-07-23 2012-01-26 Paul A. Frieze & Associates Ltd. Support structure for an offshore wind turbine
US20120045345A1 (en) * 2010-08-20 2012-02-23 Horton Wison Deepwater, Inc. Offshore wind turbine and methods of installing same
CN102619227A (en) * 2011-01-31 2012-08-01 华锐风电科技(江苏)有限公司 Grouting device, assembly and grouting method for single pipe pile foundation of offshore wind turbine generating set
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GB2365905B (en) 2003-05-14
GB0027868D0 (en) 2000-12-27

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