GB2225365A - Building and installing offshore gravity platforms - Google Patents

Building and installing offshore gravity platforms Download PDF

Info

Publication number
GB2225365A
GB2225365A GB8925610A GB8925610A GB2225365A GB 2225365 A GB2225365 A GB 2225365A GB 8925610 A GB8925610 A GB 8925610A GB 8925610 A GB8925610 A GB 8925610A GB 2225365 A GB2225365 A GB 2225365A
Authority
GB
United Kingdom
Prior art keywords
section
platform
barge
gravity platform
construction
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
GB8925610A
Other versions
GB2225365B (en
GB8925610D0 (en
Inventor
Knudsen Arnt
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.)
Norwegian Contractors AS
Original Assignee
Norwegian Contractors AS
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 Norwegian Contractors AS filed Critical Norwegian Contractors AS
Publication of GB8925610D0 publication Critical patent/GB8925610D0/en
Publication of GB2225365A publication Critical patent/GB2225365A/en
Application granted granted Critical
Publication of GB2225365B publication Critical patent/GB2225365B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02B17/025—Reinforced concrete structures
    • 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
    • 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
    • F03D13/22—Foundations specially adapted for 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
    • F03D13/40—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
    • E02B2017/0039—Methods for placing the offshore structure
    • E02B2017/0043—Placing the offshore structure on a pre-installed foundation 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
    • E02B2017/0056—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
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0069—Gravity 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
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0073—Details of sea bottom engaging footing
    • E02B2017/0086—Large footings connecting several legs or serving as a reservoir for the storage of oil or gas
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/30—Wind power
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Jib Cranes (AREA)
  • Control And Safety Of Cranes (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

A method for construction and installation of a gravity platform (1) which is in entirety being constructed on at least one floating construction and ballastable barge or the like (7). Subsequent to that the platform (1) is ready-built in one or several parts, it is in separate parts lifted off from the construction barge or barges by means of one or more cranes (8) and is immersed for assembly in correct site on the sea bottom by ballasting one barge to a water level (9) substantially level with the top edge of at least one bottom section and pumping air into the bottom sections to reduce the effective weight of the platform. <IMAGE>

Description

Title: METHOD FOR CONSTRUCTION OF OFFSHORE GRAVITY PLATFORMS AND INSTALLATION OF SUCH ON A SEA BOTTOM BY MEANS OF CRANES.
This invention relates in general to offshore gravity platforms, (GBS), preferably, but not exclusively made of concrete, and used in connection with drilling and exploration for hydro carbons in reservoirs in the sea bottom.
More particularly the invention relates to methods for building and installation of gravity platforms designed primarily for smaller depths, for instance depths of 25 to 100 meters. More particularly, the invention relates to the use of cranes in connection with building and installation of such platforms.
Conventional gravity platforms are being built such that they are self floating. The usual method is that the fundament section is firstly built in a dry dock or on a barge, whereafter the remaining operations are being carried out with the platform in floating condition, preferably in shielded waters, whereafter the ready made platform in upright floating position is being towed to the installation site, where it is emerged by ballasting.
The situation necessitating that such gravity platforms must be constructed self floating involves among other things that they must be equipped with special and cost adding ballasting possibilities which are necessary during the production, towing to the installation site, and under the installation work, but which are not required for the functioning of the platform as such.
The object of the present invention is to provide a method for making a gravity platform in its entirety on a construction barge without necessitating to furnish supplementary ballasting possibilities which are not adhered to the actual operational function of the gravity platform, but merely is due to the requirement that the platform must be self floating during the building and during the installation work.
The present invention therefore takes the aim to provide a substantial gain in the form of reduced complexity, dimensions and weight compared with conventional technique.
The utilization of the method in accordance with the present invention is clearly limited to available barge- and crane capacities.
Particularly the available crane capacities will stipulate a practical upper limit for the realization of the method.
Todays commercially available cranes for such operations lift maximum 7000 tons, in other words, two cranes and suitable construction barge will define an upper practical limit for using a such method to about 14000 tons.
The main object of the present invention is thus to provide methods for construction and installation of smaller gravity platforms with use of building barges as before mentioned. A special object of the invention is to provide a method such that the platform weight may supersede available crane capacity without need for building of supplementary ballasting capacity. The latter embodiment for using the method for construction and installation is characterized in that the construction barge, or barges, subsequent to that the.
gravity platform is being ready built on the building barge or barges, are being ballasted to a water line level substantially flush with the draft at the top edge of the bottom section of the gravity platform, the elements on the bottom sections are, if needed, being filled with air in order to reduce the effective weight of the gravity platform, whereafter the gravity platform or sections of the same are being lifted free off the construction barge and are being emerged down to the correct location on the sea bottom.
An optimalization of the applicability of the invention is realized if the gravity platform is being built in several sections on one or more construction barges. For instance a fundament section and a tower section, respectively, may be built separately and thereafter being emerged down and thereafter being assembled on the sea bottom.
The invention shall in the following be described and illustrated with reference to the accompanying drawings, wherein: Figures la and lb are showing a simple gravity platform in concrete shown in a vertical and a horizontal section, respectively, Figure 2 is showing a construction barge where the work in connection with the casting of the gravity platform has been initiated, Figure 3 is showing the gravity platform when the same is finished, Figure 4 is showing a crane on a separate crane barge ready to lift the gravity platform free off the construction barge, Figure 5 is showing a preferred transport method for the platform from the production site and out to an installation site, and Figure 6 is showing a bottom section and a tower section, respectively, which have been built separately on a construction barge and thereafter being joined together on the installation site in correct position on the sea bottom.
As it will appear from Figures la and lb, the shown gravity platform is of the most simple type cast in concrete with a fundament section 1 built of a number of cylindric elements 2,2, and a centrally located cylindric element 3 which forms fundament for a tower section 4.
The said cylindrical elements 2,2 and 3 are divided by a tight horizontal plate member 5 which is confined within a wall 6 which points upwards from said member and forms space for ballast which is supplied subsequent to that the gravity platform has been positioned on the installation site.
The gravity platform is entirely built up on a construction barge 7, confer Figures 2 and 3, where the latter Figure is showing the platform when being ready-built.
When the platform has been ready-built and constructed, the construction barge including the gravity platform is being towed to the installation site together with a crane barge 7 equipped with a crane 8. Only one crane is shown, but if necessary, two or more cranes can be used jointly in order to lift the gravity platform clear off the deck of the construction barge and thereafter being submerged down to the location on the sea bottom.
If, however, the weight of the gravity platform supersedes the lifting capacity of the crane or cranes, the construction barge 7 is being ballasted up to a water line level 9 in level with the plate 5 on the bottom section of the gravity platform.
Air is being pumped into the cylindric elements 2,2, and 3 below the tight horizontal plate member 5, whereby air chambers are being formed rendering sufficient buoyancy such that the crane/cranes can lift the gravity platform free off the construction barge, and thereafter being submerged down to correct site on the sea bottom.
In Figure 4 is shown the air-filled section 11,11, of the chambers above the water surface level 10.
During the submersion operation the said chambers are being ballasted with water, and the installation is finalized in known fashion.
Figure 5 is illustrating an alternative method for transporting the platform from a production site to the installation site, whereby the tower section 4 as shown is arranged in horizontal position on the barge 7, either separate on the barge or as shown adjacent to the bottom section 1.
This method for transportation is assumed preferable both from a cost view and from a matter of safety, especially in connection with somewhat larger and heavier platforms.
As mentioned above, the applicability of the invention may be further increased when for instance the bottom section and the tower section are being built separately on one or several construction barges. The bottom section which constitutes the heavier part, usually about 60% of the entire platform, is being lifted off the construction barge as described above, and when this is installed in correct site on the sea bottom the tower section is mounted on to the same, preferably as shown in Figure 6 which illustrates a bottom section 1 made in concrete and which is positioned on the sea bottom 12 and the tower section 4, likewise made in concrete, is submerged down into the opening or aperture in the bottom section and is being anchored to the same by means of injection cementing or the like.
If the weight of the tower section supersedes available crane capacity, the same method as used for the bottom section can also be used for the tower section, since the lower chamber 13 in the tower section which is closed at the top by means of a plate 14, can be used for lifting the tower section clear off the deck of the construction parts by means of supplied air in the same fashion as described in connection with the bottom section.
It shall be understood that the invention is not limited to sections of concrete, since it is likewise applicable for sections of steel or a mixture of the same, and adapted with joining methods in accordance with conventional techniques.

Claims (9)

Patent Claims
1. Method for building and installation of a gravity platform, wherein the platform in its entirety is being built on one or more floating construction barges or the like, and whereby the gravity platform subsequent to being built is being lifted off the construction barge or barges by means of at least one crane and being lowered down to position on the sea bottom, and by which the normal weight of the gravity platform supersedes available crane capacity, the method including the following steps, the construction barge or barges, subsequent to that the gravity platform is being built on the construction barge or barges, at least one barge is ballasted to a water level substantially level with the top edge of at least one of the bottom sections of the gravity platform, the elements of the bottom sections are being filled with air to reduce the effective weight of the gravity platform, in sufficient degree, whereafter the gravity platform or sections of the same are being lifted free of the construction barge and are submerged and lowered down into place on the sea bottom.
2. Method in accordance with claim 2, wherein the gravity platform is built in several mutual separate sections, preferably at least one bottom section and one tower section, and the bottom section is firstly lowered down into place on the sea bottom, whereafter the tower section is lowered down and is integrated with the installed bottom section.
3. Method in accordance with claim 2 or 3, wherein the construction barge subsequent to that the tower section is ready-built on the construction barge, is ballasted to a water line level on level with the top edge of a chamber in the lower part of the tower section, and said chamber is being filled with air in order to reduce the effective weight of the tower section sufficiently so that the tower section can be lifted free off the deck of the construction barge.
4. Method for construction and installation of a gravity platform in accordance with any of preceding claims, wherein the bottom section and the tower section are produced separately on at least one barge, the tower section is transported to the installation site in laying, horizontal position, whereafter, subsequent to that the bottom section is submerged down in place on the sea bottom, the tower section by means of one or more cranes is being lifted up to vertical position and is emerged and lowered down into correct position on the bottom section in order to be integrated with the same.
5. Gravity platform, particularly designed for being installed with the method in accordance with claims 1 to 3, wherein a bottom section is provided with a central opening dimensioned and designed for reception of a complementary tower section.
6. Gravity platform in accordance with claim 5, wherein the inside space of the bottom section is divided into several chambers by means of horizontal walls.
7. Gravity platform in accordance with claim 5 or 6, wherein the central part of the bottom section includes the opening for positioning of the tower section, and which part has greater height than the outwardly positioned part of the bottom section.
8. Gravity platform in accordance with claims 5 to 7, wherein the tower section is hollow and is divided into two or several vertical separated chambers.
9. Gravity platform in accordance with any of preceding claims 5 to 8, wherein the bottom section comprises a number of integrally joined concentric cylindric elements in a ring structure including one bottom wall and one top wall, and the center part of the bottom section is provided with a throughgoing substantially ring-shaped opening or shaft.
GB8925610A 1988-11-15 1989-11-13 Method for construction of offshore gravity platforms and installation of such on a sea bottom by means of cranes Expired - Lifetime GB2225365B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO885078A NO170735B (en) 1988-11-15 1988-11-15 PROCEDURE FOR THE CONSTRUCTION OF GRAVITATION PLATFORMS AND INSTALLATION OF SUCH ON THE SEA BATTLE BY CRANE

Publications (3)

Publication Number Publication Date
GB8925610D0 GB8925610D0 (en) 1990-01-04
GB2225365A true GB2225365A (en) 1990-05-30
GB2225365B GB2225365B (en) 1992-11-04

Family

ID=19891430

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8925610A Expired - Lifetime GB2225365B (en) 1988-11-15 1989-11-13 Method for construction of offshore gravity platforms and installation of such on a sea bottom by means of cranes

Country Status (2)

Country Link
GB (1) GB2225365B (en)
NO (1) NO170735B (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518802A1 (en) * 1991-06-12 1992-12-16 Capote del Villar, Antonio System for the manufacture and installation of selective intake towers in reservoirs
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
GB2359107A (en) * 2000-02-08 2001-08-15 Heerema Marine Contractors Nl Method for installing or removing an offshore structure
WO2003004870A1 (en) * 2001-07-06 2003-01-16 Saipem Sa Offshore wind turbine and method for making same
US6676334B2 (en) * 2002-06-10 2004-01-13 Deepwater Technologies, Inc. Work module support vessel
WO2006086240A1 (en) 2005-02-08 2006-08-17 Technip France System for stabilizing gravity-based offshore structures
EP1777348A1 (en) 2005-10-21 2007-04-25 Dredging International N.V. Device and method for offshore installations
US7234409B2 (en) 2003-04-04 2007-06-26 Logima V/Svend Erik Hansen Vessel for transporting wind turbines, methods of moving a wind turbine, and a wind turbine for an off-shore wind farm
ES2316211A1 (en) * 2006-01-09 2009-04-01 Manuel Torres Martinez Assembly system of aquatic structures on an anchoring and foundation foundation intended for such assembly (Machine-translation by Google Translate, not legally binding)
US20090302611A1 (en) * 2006-04-28 2009-12-10 Ian Masters Turbine
ES2381510A1 (en) * 2008-10-22 2012-05-28 Manuel Torres Martinez Method for the assembly of aerogenerators in aquatic beds and vehicle to carry out such method (Machine-translation by Google Translate, not legally binding)
TWI585295B (en) * 2015-12-23 2017-06-01 Installation method and transportation equipment for underwater base of super large offshore fan
EP4386144A1 (en) * 2022-12-12 2024-06-19 Aker Solutions AS Method and associated apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO176215B (en) * 1992-09-24 1994-11-14 Norske Stats Oljeselskap Device for foundation of a timber structure or subsea installation at sea
AU2610999A (en) 1998-02-27 1999-09-15 Bonus Energy A/S Method for installation of wind turbines at sea, fundation for wind turbines anduse of such foundation
CN111894812B (en) * 2020-07-17 2021-11-23 上海电气风电集团股份有限公司 Installation method and installation device of offshore wind turbine
NO346384B1 (en) 2020-08-20 2022-07-04 Fred Olsen Ocean Ltd A method and facility for assembling a plurality of floating wind turbines

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1435283A (en) * 1973-10-01 1976-05-12 Exxon Production Research Co Offshore platform

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1435283A (en) * 1973-10-01 1976-05-12 Exxon Production Research Co Offshore platform

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2035779A1 (en) * 1991-06-12 1993-04-16 Capote Del Villar Antonio System for the manufacture and installation of selective intake towers in reservoirs.
EP0518802A1 (en) * 1991-06-12 1992-12-16 Capote del Villar, Antonio System for the manufacture and installation of selective intake towers in reservoirs
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
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
GB2359107A (en) * 2000-02-08 2001-08-15 Heerema Marine Contractors Nl Method for installing or removing an offshore structure
GB2359107B (en) * 2000-02-08 2002-01-02 Heerema Marine Contractors Nl Method for removing or positioning a substructure of an offshore platform
WO2003004870A1 (en) * 2001-07-06 2003-01-16 Saipem Sa Offshore wind turbine and method for making same
US6676334B2 (en) * 2002-06-10 2004-01-13 Deepwater Technologies, Inc. Work module support vessel
US7234409B2 (en) 2003-04-04 2007-06-26 Logima V/Svend Erik Hansen Vessel for transporting wind turbines, methods of moving a wind turbine, and a wind turbine for an off-shore wind farm
WO2006086240A1 (en) 2005-02-08 2006-08-17 Technip France System for stabilizing gravity-based offshore structures
US7217066B2 (en) 2005-02-08 2007-05-15 Technip France System for stabilizing gravity-based offshore structures
EP1777348A1 (en) 2005-10-21 2007-04-25 Dredging International N.V. Device and method for offshore installations
ES2316211A1 (en) * 2006-01-09 2009-04-01 Manuel Torres Martinez Assembly system of aquatic structures on an anchoring and foundation foundation intended for such assembly (Machine-translation by Google Translate, not legally binding)
US20090302611A1 (en) * 2006-04-28 2009-12-10 Ian Masters Turbine
ES2381510A1 (en) * 2008-10-22 2012-05-28 Manuel Torres Martinez Method for the assembly of aerogenerators in aquatic beds and vehicle to carry out such method (Machine-translation by Google Translate, not legally binding)
TWI585295B (en) * 2015-12-23 2017-06-01 Installation method and transportation equipment for underwater base of super large offshore fan
EP4386144A1 (en) * 2022-12-12 2024-06-19 Aker Solutions AS Method and associated apparatus

Also Published As

Publication number Publication date
NO170735B (en) 1992-08-17
GB2225365B (en) 1992-11-04
NO885078L (en) 1990-05-16
GB8925610D0 (en) 1990-01-04
NO885078D0 (en) 1988-11-15

Similar Documents

Publication Publication Date Title
GB2225365A (en) Building and installing offshore gravity platforms
AU701557B2 (en) Offshore apparatus and method for oil operations
US3896628A (en) Marine structures
JP6912490B2 (en) Submarine support units and methods for providing shallow water drilling terminals
US4618286A (en) Composite platform for petroleum workings in polar seas
GB2172635A (en) Offshore drilling system
US3380256A (en) Underwater drilling installation and method of construction
KR860007432A (en) Jacket tower structure and its installation method
TW202240052A (en) Subsea foundations
EP0039590A2 (en) Offshore platform and method of constructing, erecting and dismantling same
US4470725A (en) Offshore platform structure intended to be installed in arctic waters, subjected to drifting icebergs
US4043138A (en) Offshore foundation structure
EP0908382A2 (en) Methods of assembling floating offshore structures
CN108239919B (en) The device and construction method of a kind of underwater cushion cap, the underwater cushion cap of building
GB1576581A (en) Platforms comprising an underwater structure and in their method of assembly
GB2159468A (en) An offshore vessel
CN100515858C (en) A method of constructing a semi-submersible vessel using dry dock mating
JPS63165609A (en) Setting of offshore platform
AU689950B2 (en) Method for constructing and installing an offshore gravity plaftorm structure and platform structure designed for the implementation of this method
JPS5817844B2 (en) OkiainokaiteiyuSyuyouPlatform
JPS60208512A (en) Installation of tower type marine structure
GB2124684A (en) Offshore platform
GB2314576A (en) Offshore platform assembly
GB2196675A (en) Offshore platform system
EP0178311A1 (en) Gravity platform for great water depth, method of manufacturing same, and use of such a platform

Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19991113