GB2327970A - Method of installing a tower - Google Patents

Method of installing a tower Download PDF

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Publication number
GB2327970A
GB2327970A GB9809229A GB9809229A GB2327970A GB 2327970 A GB2327970 A GB 2327970A GB 9809229 A GB9809229 A GB 9809229A GB 9809229 A GB9809229 A GB 9809229A GB 2327970 A GB2327970 A GB 2327970A
Authority
GB
United Kingdom
Prior art keywords
tower
pile
engagement means
sliding engagement
dummy
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
GB9809229A
Other versions
GB2327970B (en
GB9809229D0 (en
Inventor
Murray Charles Ferguson
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.)
Kvaerner Oil and Gas Ltd
Original Assignee
Kvaerner Oil and Gas 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 Kvaerner Oil and Gas Ltd filed Critical Kvaerner Oil and Gas Ltd
Publication of GB9809229D0 publication Critical patent/GB9809229D0/en
Publication of GB2327970A publication Critical patent/GB2327970A/en
Application granted granted Critical
Publication of GB2327970B publication Critical patent/GB2327970B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • 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
    • 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
    • F03D13/40—Arrangements or methods specially adapted for transporting wind motor components
    • 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
    • E02B2017/0039—Methods for placing the offshore structure
    • 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
    • F05B2230/00—Manufacture
    • F05B2230/60—Assembly methods
    • F05B2230/61—Assembly methods using auxiliary equipment for lifting or holding
    • F05B2230/6102—Assembly methods using auxiliary equipment for lifting or holding carried on a floating platform
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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

Abstract

Method of installing a slender tower in an upright attitude at an offshore location, comprising the steps of :- taking a slender tower 20 and arranging sliding engagement means at what is to become a lower end of that tower for relative axial movement with respect to the lower end of the tower; positioning the tower (using crane 21) in an upright attitude over an upper end of a dummy pile 27, the dummy pile being set in a seabed at a sheltered location with its axis vertical; setting the tower and sliding engagement means on that dummy pile with the axis of the tower upright; using a transportation vessel 22 lift the tower and the sliding engagement means off the dummy pile so that the tower is supported by the transportation vessel with the sliding engagement means at the lower end of the tower; moving the transportation vessel 22 with the tower 20 and sliding engagement means to the offshore location; arranging the transportation vessel adjacent to an upper end of a preinstalled vertical pile (not shown in Figure 5); positioning the tower and sliding engagement means in an upright attitude over the preinstalled pile; lowering the sliding engagement means from the tower into engagement with the upper end of the preinstalled pile; and fixing the sliding engagement means to the tower and to the preinstalled pile, so that the tower stands upright at the offshore location. The slender tower may be a windmill.

Description

METHOD OF INSTALLING A TOWER The invention relates to a method of installing a tower, and to a tower or group of towers so installed.
In particular, the invention relates to a method of installing a slender tower at an offshore site, for instance to support the nacelle and blades of a windmill.
The installation of towers at offshore sites gives rise to several inherent problems.
The towers must be constructed on shore or at shore, and then moved to their intended offshore site, and there set down on the seabed. During construction, it may be convenient for a tower to be in an upright attitude. At the offshore site it is essential for the tower to be in an upright attitude, because that is the purpose for which it is designed.
However, during transportation across open water, a problem arises in that an upright tower could have only marginal stability. This marginal stability would be particularly critical in high wind conditions when controlling tugs might have difficulties in manoeuvring. This problem could be exacerbated in circumstances in which a very slender tower with a point weight at its upper end (e.g. an offshore windmill), was transported to site by a small vessel.
The problem could be alleviated if a larger vessel were to be used. The greater stability of the larger vessel would allow safe transportation and installation. Nevertheless, the operating costs of the larger vessel could be too expensive for a single installation, so rendering a proposed offshore development uneconomic.
A further problem arises when the tower is to be set down on the seabed. There may be a point of instability, at which the tower has its centre of buoyancy and centre of gravity coincident.
Heretofore it has been known to tow towers to their intended offshore sites in an upright attitude, with their centre of gravity below their centre of buoyancy; and then to sink them onto the seabed. The massive Condeep gravity based plafforms for the Norwegian sector of the North Sea were so installed. In particular, the single column substructure for Norske Shell's Draugen plafform was installed by this technique. However, this technique might be difficult to implement in shallower water.
For smaller towers to be installed in shallower waters, the tower may be carried out to its intended site in an upright attitude on the deck of a vessel. This was the case with NAM's Offshore Loading Tower for one of their developments offshore the Netherlands. An Offshore Loading Tower of this type was featured in our UK patent specification 2267525. However, canying a tower on the deck of a vessel increases the overall height of the tower above the centre of buoyancy of the vessel. This increases the stresses induced in the tower by pitch and particularly roll motions of the vessel due to wind and waves.
It has also been known to carry towers horizontally, and then to upend them at the required offshore site. This is the simplest method of transporting and installing slender towers. Indeed this method is used for transportation and installation of conventional piles for offshore structures. However, this method would be unsuitable for the transportation and installation of towers for windmills for two reasons. First, the delicate components of the windmill could be damaged in transit; and second, the act of hammering the tower into the seabed could damage the windmill during installation.
Thus there is a requirement for a method of installing a slender tower (e.g. for a windmill) in an upright attitude at an offshore site without incurring any of these disadvantages.
The invention provides a method of installing a slender tower in an upright attitude at an offshore location, comprising the steps of: taking a slender tower and arranging sliding engagement means at what is to become a lower end of that tower for relative axial movement with respect to the lower end of the tower; positioning the tower in an upright attitude over an upper end of a dummy pile, the dummy pile being set in a seabed at a sheltered location with its axis vertical; setting the tower and sliding engagement means on that dummy pile with the axis of the tower upright; moving a transportation vessel to a position adjacent to the dummy pile; using the transportation vessel to lift the tower and the sliding engagement means off the dummy pile so that the tower is supported by the transportation vessel with the sliding engagement means at the lower end of the tower; moving the transportation vessel with the tower and sliding engagement means to the offshore location; arranging the transportation vessel adjacent to an upper end of a preinstalled vertical pile; positioning the tower and sliding engagement means in an upright attitude over the preinstalled pile; lowering the sliding engagement means from the tower into engagement with the upper end of the preinstalled pile; fixing the sliding engagement means to the tower and to the preinstalled pile, so that the tower stands upright at the offshore location; and moving the transportation vessel away from the tower.
In one form it is preferred that the sliding engagement means is a pin initially arranged within a hollow lower end of the tower.
In this form it is further preferred that the tower is set on the dummy pile by lowering the pin from the tower into a hollow upper end of that dummy pile.
In another form it is preferred that the sliding engagement means is a sleeve initially arranged to surround the lower end of the tower.
In this other form it is further preferred that the tower is set on the dummy pile by lowering the sleeve from the tower to surround an upper end of the dummy pile.
The tower may be fixed to the sliding engagement means by grouting or by swaging.
The tower may be fixed to the sliding engagement means by grouting or by swagging.
The invention includes a method of forming an offshore windfarm comprising the steps of installing an array of vertical piles at an offshore site, and then setting windmills on those piles by the method described above.
The invention also provides a slender tower when installed in accordance with the method described above; and an offshore platform formed on two or more such slender towers; and a windfann including a plurality of such slender towers.
A specific embodiment of a method according to the invention will now be described by way of example with reference to the accompanying drawings in which: Figure 1 is a diagrammatic side view of an offshore windmill set on a dummy pile adjacent to a quay; Figure 2 is a similar view of the windmill being floated out to its intended offshore site; Figure 3 is a similar view of the windmill located on a pre-installed pile at that site; Figure 4 is a similar view of the windmill in its permanently installed state; and Figure 5 shows cranage used to transfer the windmill.
A windmill 10 has been assembled in a fabrication yard. The windmill has a rotor 11, a nacelle 12, and a slender tower 14. The lower end of the tower 14 is hollow, and contains a pin 15. The pin is arranged for limited sliding movement within the hollow lower end of the tower.
The fabrication yard has a quay 16, and prior to assembly of the windmill, a dummy pile 17 was driven vertically into the seabed adjacent to the quay. When the windmill is ready to leave the yard, the tower 14 is positioned in an upright attitude over the dummy pile 17 (using yard cranage). The pin 15 is lowered from the lower end of the tower 14 into the hollow upper end of the dummy pile 17, so to set the tower on the pile. In its lowered position the pin stabilises the tower on the dummy pile, as shown in Figure 1.
The windmill may be assembled on the dummy pile, or it may be set on the dummy pile when complete.
With the tower in a stable upright attitude, a transportation vessel (forming no part of this invention) is secured adjacent to the dummy pile 17. the complete windmill is then connected to the transportation vessel (using cranage on the vessel), and the pin 15 is lifted dear of the dummy pile.
In this configuration (illustrated in Figure 2) the windmill is transported to its intended offshore site with the pin 15 in its raised position.
While the windmill was under construction (or possibly even earlier) a hollow pile 18 was pre-installed vertically into the seabed 19 at the intended offshore site.
end is in contact with the upper end of the pre-installed pile. The lowering may be effected by mechanical means; or by ballasting the transportation vessel; or, given sufficient tidal range, by using a falling tide. This situation is depicted in Figure 3.
With the tower 14 in its intended position, the pin 15 is lowered into the hollow upper end of the pre-installed pile 18. The pin 15 is grouted within the tower 14 and the pile 18 to form a permanent fixture therebetween. The transportation vessel can then be moved away from the windmill, leaving the situation shown in Figure 4.
Figure 5 shows how a dockyard crane 21 is used to place a windmill 20 on a dummy pile 27. Figure 5 also shows (in broken lines) how an installation vessel 22 is used to lift the windmill off the dummy pile 27 for movement to its intended offshore site.
The technique described above by way of example could be particularly advantageous if a single vessel was used for the sequential installation of a multiplicity of offshore windmills.
The vessel could carry several windmills on each side of its hull. The windmills could be picked up from different fabrication yards. The windmills could then be transported together to the offshore site. At that site they could be set down individually on an array of spaced apart pre-installed piles.
An offshore windfarm could be formed in this way. One pile driving vessel could preinstall the array of piles offshore, while the windmills were being built at one or more onshore fabrication yards. The installation vessel could then collect the windmills from the yards, and set them on the pre-installed piles. The use of pre-installed piles would reduce the time needed for offshore operations.
The installation vessel might be the same vessel that was used to drive the piles.
Otherwise one specialised vessel could be used for pile driving, and another for the transportation and installation tasks. In either case the method described above would permit efficient use of a vessel or vessels to form an offshore windfarm.

Claims (12)

1. Method of installing a slender tower in an upright attitude at an offshore location, comprising the steps of : taking a slender tower and arranging sliding engagement means at what is to become a lower end of that tower for relative axial movement with respect to the lower end of the tower; positioning the tower in an upright attitude over an upper end of a dummy pile, the dummy pile being set in a seabed at a sheltered location with its axis vertical; setting the tower and sliding engagement means on that dummy pile with the axis of the tower upright; moving a transportation vessel to a position adjacent to the dummy pile; using the transportation vessel to lift the tower and the sliding engagement means off the dummy pile so that the tower is supported by the transportation vessel with the sliding engagement means at the lower end of the tower; moving the transportation vessel with the tower and sliding engagement means to the offshore location; arranging the transportation vessel adjacent to an upper end of a preinstalled vertical pile; positioning the tower and sliding engagement means in an upright attitude over the preinstalled pile; lowering the sliding engagement means from the tower into engagement with the upper end of the preinstailed pile; fixing the sliding engagement means to the tower and to the preinstalled pile, so that the tower stands upright at the offshore location; and moving the transportation vessel away from the tower.
2. A method as claimed in Claim 1 in which the sliding engagement means is a pin initially arranged within a hollow lower end of the tower.
3. A method as claimed in Claim 2 in which the tower is set on the dummy pile by lowering the pin from the tower into a hollow upper end of that dummy pile.
4. A method as claimed in Claim 1 in which the sliding engagement means is a sleeve initially arranged to surround the lower end of the tower.
5. A method as claimed in Claim 4 in which the tower is set on the dummy pile by lowering the sleeve from the tower to surround an upper end of the dummy pile.
6. A method as claimed in any one of the preceding claims in which the tower is fixed to the sliding engagement means by grouting.
7. A method as claimed in any one of claims 1 to 5 in which the tower is fixed to the sliding engagement means by swaging.
8. A method of installing a slender tower substantially as hereinbefore described with reference to the accompanying drawings.
9. A method of forming an offshore wind farm comprising the steps of installing an array of vertical piles at an offshore site, and then setting windmills on those piles by the method claimed in any one of the preceding claims.
10. A slender tower when installed in accordance with the method of any one of the preceding claims 1 to 8.
11. An offshore platform formed on two or more slender towers as claimed in Claim 10.
12. A windfarm including a plurality of slender towers as claimed in Claim 10.
GB9809229A 1997-04-29 1998-04-29 Method of installing a tower Expired - Fee Related GB2327970B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9708633.4A GB9708633D0 (en) 1997-04-29 1997-04-29 Method of installing a tower

Publications (3)

Publication Number Publication Date
GB9809229D0 GB9809229D0 (en) 1998-07-01
GB2327970A true GB2327970A (en) 1999-02-10
GB2327970B GB2327970B (en) 2000-12-13

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GB9809229A Expired - Fee Related GB2327970B (en) 1997-04-29 1998-04-29 Method of installing a tower

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999043956A1 (en) * 1998-02-27 1999-09-02 Bonus Energy A/S Method for installation of wind turbines at sea, fundation for wind turbines and use of such foundation
WO2000039903A1 (en) * 1998-12-24 2000-07-06 Aerodyn Engineering Gmbh Method for laying electrical cables from a first offshore wind power plant to a second offshore wind power plant
GB2348465A (en) * 1999-02-24 2000-10-04 I T Power Limited Combination air and water turbine.
WO2001034977A1 (en) * 1999-11-11 2001-05-17 Rinta Jouppi Yrjoe Method and system for installing and transporting an offshore wind power station at sea
EP1101935A2 (en) * 1999-11-17 2001-05-23 Bonus Energy A/S Method and vessel for installation of off-shore windmills
EP1130173A1 (en) * 2000-02-22 2001-09-05 N.V. Kema Method and apparatus for erecting a construction at sea
EP1174336A1 (en) * 2000-07-18 2002-01-23 Maierform Maritime Technology GmbH Fixed location positioning of functional units on or in water
GB2365905A (en) * 2000-08-19 2002-02-27 Ocean Technologies Ltd Offshore structure with a telescopically extendable column
WO2003093584A1 (en) * 2002-05-01 2003-11-13 Marine Structure Consultants (Msc) B.V. Method and vessel for manipulating an offshore construction
WO2003100178A1 (en) * 2002-05-27 2003-12-04 Vestas Wind Systems A/S Methode of mounting a wind turbine, a wind turbine foundation anda wind turbine assembly
GB2408767A (en) * 2003-12-03 2005-06-08 Slp Engineering Ltd Method of constructing a piled offshore platform
US20100219645A1 (en) * 2003-10-23 2010-09-02 Oceanwind Technology, Llc. Power generation assemblies and apparatus
WO2012070937A1 (en) 2010-11-22 2012-05-31 Suction Pile Technology Bv Method of installing an offshore tower
CN106930900A (en) * 2017-02-16 2017-07-07 江苏海上龙源风力发电有限公司 It is a kind of to exempt from the offshore wind turbine installation method of large lifting equipment
CN110617183A (en) * 2019-10-08 2019-12-27 沙焕焕 Construction method for installing assembled wind driven generator by offshore topdown method
GB2605377A (en) * 2021-03-29 2022-10-05 Equinor Energy As Foundation for an offshore wind turbine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054914A1 (en) * 1980-12-23 1982-06-30 ALSTHOM-ATLANTIQUE Société Anonyme dite: Device for setting up an offshore platform on a supporting structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054914A1 (en) * 1980-12-23 1982-06-30 ALSTHOM-ATLANTIQUE Société Anonyme dite: Device for setting up an offshore platform on a supporting structure

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999043956A1 (en) * 1998-02-27 1999-09-02 Bonus Energy A/S Method for installation of wind turbines at sea, fundation for wind turbines and use of such foundation
WO2000039903A1 (en) * 1998-12-24 2000-07-06 Aerodyn Engineering Gmbh Method for laying electrical cables from a first offshore wind power plant to a second offshore wind power plant
GB2348465A (en) * 1999-02-24 2000-10-04 I T Power Limited Combination air and water turbine.
GB2348465B (en) * 1999-02-24 2003-08-20 I T Power Ltd Combined water and air turbines
AU770613B2 (en) * 1999-11-11 2004-02-26 Yrjo Rinta-Jouppi Method and system for installing and transporting an offshore wind power station at sea
WO2001034977A1 (en) * 1999-11-11 2001-05-17 Rinta Jouppi Yrjoe Method and system for installing and transporting an offshore wind power station at sea
EP1101935A3 (en) * 1999-11-17 2001-11-28 Bonus Energy A/S Method and vessel for installation of off-shore windmills
EP1101935A2 (en) * 1999-11-17 2001-05-23 Bonus Energy A/S Method and vessel for installation of off-shore windmills
EP1130173A1 (en) * 2000-02-22 2001-09-05 N.V. Kema Method and apparatus for erecting a construction at sea
EP1174336A1 (en) * 2000-07-18 2002-01-23 Maierform Maritime Technology GmbH Fixed location positioning of functional units on or in water
GB2365905A (en) * 2000-08-19 2002-02-27 Ocean Technologies Ltd Offshore structure with a telescopically extendable column
GB2365905B (en) * 2000-08-19 2003-05-14 Ocean Technologies Ltd Offshore windtower
WO2003093584A1 (en) * 2002-05-01 2003-11-13 Marine Structure Consultants (Msc) B.V. Method and vessel for manipulating an offshore construction
WO2003100178A1 (en) * 2002-05-27 2003-12-04 Vestas Wind Systems A/S Methode of mounting a wind turbine, a wind turbine foundation anda wind turbine assembly
CN1325792C (en) * 2002-05-27 2007-07-11 威斯塔斯风力系统公开有限公司 Method of mounting wind turbine, wind turbine foundation and wind turbine assembly
US7281902B2 (en) 2002-05-27 2007-10-16 Vestas Wind Systems A/S Methods of mounting a wind turbine, a wind turbine foundation and a wind turbine assembly
US20100219645A1 (en) * 2003-10-23 2010-09-02 Oceanwind Technology, Llc. Power generation assemblies and apparatus
US9003631B2 (en) * 2003-10-23 2015-04-14 Shigeyuki Yamamoto Power generation assemblies and apparatus
GB2408767A (en) * 2003-12-03 2005-06-08 Slp Engineering Ltd Method of constructing a piled offshore platform
EP1699980B1 (en) * 2003-12-03 2009-09-16 SLP Engineering Limited Method of constructing a single pile offshore platform.
WO2012070937A1 (en) 2010-11-22 2012-05-31 Suction Pile Technology Bv Method of installing an offshore tower
CN106930900A (en) * 2017-02-16 2017-07-07 江苏海上龙源风力发电有限公司 It is a kind of to exempt from the offshore wind turbine installation method of large lifting equipment
CN110617183A (en) * 2019-10-08 2019-12-27 沙焕焕 Construction method for installing assembled wind driven generator by offshore topdown method
GB2605377A (en) * 2021-03-29 2022-10-05 Equinor Energy As Foundation for an offshore wind turbine
GB2605377B (en) * 2021-03-29 2023-11-29 Equinor Energy As Foundation for an offshore wind turbine

Also Published As

Publication number Publication date
GB2327970B (en) 2000-12-13
GB9809229D0 (en) 1998-07-01
GB9708633D0 (en) 1997-06-18

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