US3738113A - Offshore oil storage structure with submergence shell - Google Patents

Offshore oil storage structure with submergence shell Download PDF

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Publication number
US3738113A
US3738113A US00189227A US3738113DA US3738113A US 3738113 A US3738113 A US 3738113A US 00189227 A US00189227 A US 00189227A US 3738113D A US3738113D A US 3738113DA US 3738113 A US3738113 A US 3738113A
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United States
Prior art keywords
shell
roof shell
offshore structure
submergence
roof
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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.)
Expired - Lifetime
Application number
US00189227A
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English (en)
Inventor
J Madary
W Davis
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.)
Chicago Bridge and Iron Co
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Chicago Bridge and Iron Co
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Filing date
Publication date
Application filed by Chicago Bridge and Iron Co filed Critical Chicago Bridge and Iron Co
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Publication of US3738113A publication Critical patent/US3738113A/en
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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
    • 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
    • E02B2017/0056—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
    • E02B2017/0073—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

Definitions

  • ABSTRACT An offshore structure floatable to a site for positioning
  • ballasting material means to supply ballasting material to, and remove it from, the hollow vessel.
  • PAIENIEBJUII 2m OFFSHORE OIL STORAGE STRUCTURE WITH SUBMERGENCE SHELL This invention relates to offshore structures. More particularly, this invention relates to offshore structures used for drilling for oil, the storage of oil and the mooring of vessels.
  • Such a structure can be used in oil-exploration since it can be floated to an area which is believed to have potential oil deposits, submerged to the floor of the body of water at such area and drilling commenced to establish or not the presence of oil. If the drilling proves fruitless, the structure can be refloated and then moved to another area for further exploratory oil well drilling. In addition to having such capabilities, the structure should also advisably be able to store a substantial quantity of oil produced from one or more offshore oil wells so that the same structure can be employed both for oil exploration and oil production to thereby elimi nate the need for separate structures for each of these objects.
  • a novel offshore structure which can be floated to a suitable area offshore and submerged to the floor of the body of water. Furthermore, in its most useful form it can be refloated or raised at any suitable time and moved thereafter to another locality, In addition, the
  • novel offshore structure possesses the capacity to store a substantial quantity of oil while it rests on the floor of a body of water.
  • oil produced from offshore wells can be conveyed to the structure and held in storage there until loaded onto a ship for transportation.
  • the offshore structure provided herewith also possesses total stability when submerged to the floor of a body of water. Its most suitable form also has total stability when it is raised or refloated from the floor of a body of water.
  • Such offshore structure can be raised and lowered in a vertical line with only minimal tilt due to wind and wave action.
  • the offshore structure provided by this invention can be further characterized as having a roof shell which encloses a volume therebelow.
  • the roof shell has a peripheral ballasting ring which provides a substantial righting moment against significant tilting of the structure while the ballasting ring is at least partly above water level.
  • the structure also has a submergence shell, joined at its bottom to the roof shell, extending upwardly spaced away from the roof shell, which defines a material well between the submergence shell and the roof shell.
  • the offshore structure has at least one hollow vessel joined to the roof shell.
  • the hollow vessel is of such size that the buoyancy of the hollow vessel will statically float the roof shell above the floor of a body of water partly or fully submerged at least with all air removed from beneath the roof shell and with the material well full, i.e., not contributing buoyancy.
  • the offshore structure also has suitable means to remove air from the space beneath the roof shell and to supply the space with a suitable liquid, advisably water, during submergence of the offshore structure.
  • Means are also provided in the offshore structure to supply a material such as a liquid, and advisably water, to the material well.
  • Means are also advisably provided to remove the material from the material well such as when raising the structure.
  • Suitable means in addition can supply a material, such as water, to the hollow vessel and remove it therefrom when desired.
  • the hollow vessel advisably is vertically positioned in axial central relationship in the offshore structure. It advisably is provided with a vertical cylindrical wall from at least near the bottom to an intersection of the roof shell with the cylindrical wall.
  • a vertical tube or column is furthermore advisably positioned to communicate with the top interior of the hollow vessel and to extend upwardly therefrom to above the water surface when the offshore structure rests on the floor of a body of water.
  • the roof shell is desirably concentrically joined to an upper walled part of the hollow vessel and extends therefrom radially outwardly and downwardly.
  • the submergence shell can be positioned either inside of the roof shell or on the outside of the roof shell.
  • the submergence shell can generally comprise a metal plate, ring-like element, joined at its lower edge to the roof shell and extending laterally outwardly and upwardly from such location to wall-in a substantial volume comprising the material well.
  • the upper edge of the submergence shell can be joined to the roof shell or it can be fixed in position spaced away therefrom so as to leave the upper area of the material well open.
  • the upper part of the submergence shell can also be joined to the roof shell and suitable openings or ports provided at strategic locations in and around the submergence shell to permit communication between the interior space comprising the material well and the space outside of the material well.
  • the submergence shell projects upwardly for a substantial distance and thereby provides a rather high material well space which serves to supply a very substantial righting moment to the offshore structure during floatation of the offshore structure when at least part of the material well space is in submerged position but during which at least some of the material well is above the surface of the water.
  • the substantial righting force results because of the comparatively wide cutwater plane which exists when the water level intersects the material well space.
  • FIG. 1 is an isometric view, partially cut away, of one embodiment of an offshore structure provided by the invention having a submergence shell under the roof shell and shown resting on the floor of a body of water;
  • FIG. 2 is a partial vertical sectional view of the offshore structure of FIG. 1;
  • FIG. 3 is a partial horizontal sectional view taken along the line 3-3 of FIG. 2;
  • FIG. 4 is a partial vertical sectional view of another embodiment of the invention and has the submergence shell outside of the roof shell;
  • FIG. 5 is a partial vertical sectional view of a third embodiment of the invention and shows a submergence shell below the roof shell with an opening in the upper portion of the submergence shell;
  • FIG. 6 is a partial elevational view taken along the line 66 of FIG. 5;
  • FIGS. 7 to 14 illustrate a submergence sequence for placing the offshore structure of FIGS. 1 to 3 on the floor of a body of water.
  • the offshore structure has a roof shell 10, shaped substantially like a segment of a spherical surface, which envelopes a volume or space 60 beneath it.
  • the roof shell is however open at the bottom although it can have closed bottom.
  • the roof shell 10 has a peripheral ballasting ring 11, such as of concrete, at its bottom edge portion. It provides a substantial righting moment against significant tilting of the offshore structure while the ballasting ring is at least partly above water level. While the ballasting ring can be completely solid, it advisably has a deep channel 12, open at the top, extending circularly in the ring. The presence of such a channel however is not necessary even though it provides a better structure.
  • a plurality of shear cans 13 are placed on the bottom of the ballasting ring.
  • the shear cans l3 penetrate into the sea bed and anchor the structure against lateral movement by sea currents and waves.
  • the hollow vessel 14 has .a vertical cylindrical portion 15, circular in horizontal cross-section, which extends from the bottom plane of the ballasting ring 11 to the intersection 17 with roof shell 10.
  • a dished bottom 16 (FIG. 1) closes the lower end of the circular cylindrical portion 15.
  • a plurality of tubular spokes 18 extend radially and horizontally from the bottom edge of cylindrical portion to ballasting ring 11 and serve to maintain the hollow vessel 14 in fixed position relative to the roof shell 10.
  • the hollow vessel 14 has a conical top 19 (FIG. 1), which projects upwardly from cylindrical portion 15, and it is closed by plate 20 (FIG. 1).
  • Pipe 24 comprises a well casing for drilling a well or for oil production.
  • submergence shell 25 (FIGS. l-3) has a lower conical ring portion 26 of metal plate, and an upper conical ring portion 27 of metal plate. The lower edge of conical portion 26 is joined to the inside surface of roof shell 10, advisably below the top of ballasting ring 11.
  • the submergence shell 25 extends upwardly therefrom spaced away from the roof shell 10 and thus defines a material well space 28 between the submergence shell and the roof shell.
  • Partitions 29 are placed vertically, spaced apart from one another, as shown most clearly in FIG. 3, in the material well space 28 and extend from the submergence shell to the roof shell, thereby dividing the material well into compartments.
  • Conduits 30 communicate with each compartment to supply a material, usually water, although it can be a solid particulate material such as gravel or sand, thereto during submergence of the structure and to remove it therefrom to raise the structure.
  • Conduit 31 removes air from beneath roof shell 10 during submergence and supplies air during raising of the offshore structure.
  • Conduit 32 is used to supply a material such as water or other ballast to hollow vessel 14 to submerge the structure and is used to remove the ballast, particularly water, from hollow vessel 14, while air is supplied by another conduit not shown, to raise the offshore structure.
  • FIG. 4 shows another embodiment of the invention with the submergence shell 40 on the outside of the roof shell 10.
  • the submergence shell 40 has a lower conical ring portion 41 of metal plate, joined at its lower edge to roof shell 10, and an upper curved ring portion 42 of metal plate which extends upwardly from ring 41 and terminates spaced away from the roof shell.
  • the space between submergence shell 40 and roof shell 10 defines a material well space 43 similar to well space 28 in the embodiment of FIGS. 1 to 3.
  • the material well space 43 is partitioned into compartments by vertical spaced apart partitions or bulkheads in the same way as shown in the embodiment of FIGS. 1 to 3.
  • Each compartment is in communication with a conduit to supply a ballasting material, such as water, to, or remove it from, the compartment.
  • FIGS. 5 and 6 illustrate another embodiment of the invention.
  • the submergence shell 50 is joined at its upper and lower edges to roof shell 10. Openings 51 at the top portion of the submergence shell provide a means for air to leave the material well 53 space and flow to the space beneath the roof shell 10 when the material well 53 is supplied with water or other ballasting liquid or solid material.
  • the material well 53 if partitioned into compartments by spaced apart, radially positioned vertical bulkheads 54 and a conduit 55 provides a means to supply a material such as water to each compartment separately.
  • FIGS. 7 to 14 show schematically the submergence steps for placing the offshore structure of FIGS. 1 to 3 on the floor of a body of water. The procedure however is also broadly applicable to the second embodiment shown in FIG. 4 and the third embodiment of FIGS. 5 and 6.
  • FIG. 7 represents the maximum floating position of the offshore structure after its construction on shore in a graving dock followed by floatation towing to the location where it is to be submerged.
  • the offshore structure floats on the air bubble trapped in the space 60 below the roof shell 10. Stability of the structure is inherent because of the large cut-water plane of the ballasting ring 11 on the water surface.
  • ballasting ring 11 In the first step of submerging the offshore structure, water or some other liquid or solid ballasting material is placed in the channel 12 in ballasting ring 11. This lowers the structure to the position shown in FIG. 8. If a liquid such as water is placed in channel 12, it is necessary to partition the channel into compartments to keep the liquid from flowing to one side since that will cause a tilting moment which leads to instability of the structure.
  • ballasting ring 11 After the ballasting ring 11 has been filled with ballast, some air is removed from beneath the roof shell by conduit 31 to lower the offshore structure to the position shown in FIG. 9. In this position, the submergence shell 25 lower edge is below the surface of the sea and as a result a substantial cut-water plane is created which stabilizes the structure against tilting even though the entire ballasting ring 11 is beneath the sea. Ballasting material such as water is then supplied in equal amounts to each of the compartments in the material well 28 until the wellis about one-half filled to lower the structure to the position shown in FIG. 10.
  • Hollow vessel 14 can be constructed as a pressure vessel to withstand the pressure of the sea or it can be made of thin plate and pressurized internally to balance the sea pressure.
  • Submerging of the offshore structure from the position shown in FIG. 13 until it rests on the sea floor can be effected byadding a ballasting material such as water or sand to the hollow vessel 14. As the ballast is so added, the structure descends with total control in an upright vertical position until it rests on the sea floor as shown in FIG. 14.
  • a ballasting material such as water or sand
  • the offshore structure After the offshore structure is positioned on the sea floor, it can be used to drill exploratory oil wells or oil production wells. It can also be used for oil storage.
  • the entire space below the roof shell, in the hollow vessel and the material well, can be used for oil storage. These spaces can be placed in common communication by cutting holes or openings in the submergence shell and in cylindrical wall 15. With the bottom of the offshore structure open to the sea, oil pumped into the space below the roof shell displaces water which flows out beneath the ballasting ring 11.
  • the submergence shell system as described, as well as obvious variations thereof which will occur to those skilled in the art, provides a means by which the offshore structure can be submerged and raised with total stability in a vertical line, with minimal tilting. It permits controlled ballasting after the structure is floating and permits use of cheap ballast, i.e., sea water. By reducing the permanent ballast built into the structure during construction on land, capital investment is reduced. Also, the offshore structure floats higher initially and thus is easier to float, with lower cost, out of a graving dock on shore.
  • An offshore structure floatable to a site for positioning on the floor of a body of water comprising:
  • a roof shell enclosing a volume therebelow, said roof shell having a peripheral ballasting ring which provides a substantial righting moment against significant tipping of the structure while the ballasting ring is at least partly above water level;
  • a submergence shell joined at its bottom to the roof shell and extending upwardly spaced away from the roof shell thereby defining a material well between v the submergence shell and the roof shell;
  • the upper part of said material well being provided with at least one opening permitting direct communication between the interior space of the material well and the exterior thereof;
  • said material well being so positioned as to be completely submerged when said structure is positioned on the floor of said body of water;
  • At least one hollow vessel joined to the roof shell said hollow vessel being of such size that the buoyancy of the vessel will statically float the roof shell above the floor of a body of water partly or fully submerged at least with all air removed from beneath the roof shell and with the material well full of material;
  • Anoffshore structure in which the hollow vessel has a vertical tube communicating with the top interior of the vessel and extending upwardly therefrom to above the water surface when the tank is on the floor of a body of water.
  • An offshore structure according to claim 1 including means to remove material from the hollow vessel.
  • An offshore structure according to claim 13 including means to remove material from the material well.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Bridges Or Land Bridges (AREA)
US00189227A 1971-10-14 1971-10-14 Offshore oil storage structure with submergence shell Expired - Lifetime US3738113A (en)

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US18922771A 1971-10-14 1971-10-14

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JP (1) JPS5123083B2 (enrdf_load_stackoverflow)
AU (1) AU456257B2 (enrdf_load_stackoverflow)
CA (1) CA955763A (enrdf_load_stackoverflow)
GB (1) GB1374158A (enrdf_load_stackoverflow)
IT (1) IT975155B (enrdf_load_stackoverflow)
NL (1) NL7213069A (enrdf_load_stackoverflow)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3914947A (en) * 1972-09-15 1975-10-28 Doris Dev Richesse Sous Marine Subaquatic structure
US3921558A (en) * 1974-09-16 1975-11-25 Vickers Ltd Floatable vessel
US3946568A (en) * 1975-03-24 1976-03-30 Sigurd Heien Offshore oil production platform
US3950805A (en) * 1974-01-14 1976-04-20 Parson, Brinkerhoff, Quade & Douglas, Inc. Combination providing safety berthing, unloading of oil, and conduit carriage to refineries on land, of large deep-sea-requiring tankers
US3961489A (en) * 1972-05-02 1976-06-08 Olav Mo Method for placing a floating structure on the sea bed
US3999395A (en) * 1973-04-26 1976-12-28 Ab Vattenbyggnadsbyran Support arrangement for a construction
FR2313508A1 (fr) * 1974-12-31 1976-12-31 Doris Dev Richesse Sous Marine Dispositif protegeant contre les affouillements le pied d'un ouvrage reposant sur le fond d'une nappe d'eau
US4000624A (en) * 1975-06-10 1977-01-04 Lin Offshore Engineering, Inc. Multi-component offshore platform
US4045968A (en) * 1974-12-24 1977-09-06 Kajima Corporation Offshore platform and method for its installation
US4114392A (en) * 1976-06-24 1978-09-19 Compagnie Generale Pour Les Developpements Operationnels Des Richesses Sous-Marines Platform structure for maritime installations
US4170429A (en) * 1976-09-29 1979-10-09 Compagnie Generale Pour Les Developpements Operationnels Des Richesses Sous-Marines "C.G. Doris" Installation for inspecting and repairing installations in deep water
US4371292A (en) * 1979-07-02 1983-02-01 Kabushiki Kaisha Meiji Gomu Kasei Gravity structure
EP0071297A1 (en) * 1981-07-23 1983-02-09 Ingenieursbureau H. Veth B.V. A tower for forming a drilling and/or production island
FR2566023A1 (fr) * 1984-06-14 1985-12-20 Dziewolski Richard Plate-forme marine, notamment destinee a former une base de loisirs
US4749309A (en) * 1985-10-23 1988-06-07 Norwegian Contractors Offshore platform structure of reinforced concrete and a method of producing same
US5224962A (en) * 1991-06-18 1993-07-06 Norwegian Contractors A.S. Method and apparatus for submersion and installation of fundament structures on the sea bottom
US5379559A (en) * 1991-11-29 1995-01-10 Niimura; Masateru Semisubmersible building
WO1997017496A1 (en) * 1995-11-06 1997-05-15 British Gas Plc Offshore exploration or production operation
US5639186A (en) * 1992-07-03 1997-06-17 Ferrari; Lorenzo Water funnel
WO1998039550A1 (en) * 1997-03-05 1998-09-11 Norsk Hydro Asa Structure for the production of oil and/or gas at sea
US5980159A (en) * 1994-12-09 1999-11-09 Kazim; Jenan Marine stabilising system and method
EP1398268A1 (en) 2002-08-29 2004-03-17 Shimon Strizhakov Floating residential structure
US20090269136A1 (en) * 2008-04-24 2009-10-29 Chen Su-Chin Hooked Collar for Piers and Bridge including the same
US20100074692A1 (en) * 2006-09-11 2010-03-25 Mark E Ehrhardt Open-Sea Berth LNG Import Terminal
WO2010143976A3 (en) * 2009-06-10 2011-03-03 Seatower As A foundation, a method of manufacturing the foundation, and a method of installing the foundation on a seabed
US20110188945A1 (en) * 2010-02-02 2011-08-04 Rune Hartkopf Support structure for supporting an offshore wind turbine
US20110305523A1 (en) * 2008-06-20 2011-12-15 Seatower As Support structure for use in the offshore wind farm industry
US20120020742A1 (en) * 2010-07-22 2012-01-26 Mahmoud Mostafa H Underwater Reinforced Concrete Silo for Oil Drilling and Production Applications
CN102514691A (zh) * 2011-12-07 2012-06-27 段静明 海上安全建筑
EP2420441A3 (de) * 2010-08-20 2012-08-15 IMPaC Offshore Engineering GmbH Offshore-Anordnung und Verfahren zur Installation einer Offshore-Anordnung
ES2593263A1 (es) * 2015-06-05 2016-12-07 Iberdrola Renovables Energía, S.A. Sistema de cimentación por gravedad para la instalación de aerogeneradores o instalaciones offshore y procedimiento para la instalación de un sistema de cimentación de aerogeneradores o instalaciones offshore
KR20210057800A (ko) * 2018-07-06 2021-05-21 파브 홀딩 에이에스 정지 플로팅 플랫폼
CN113439054A (zh) * 2018-07-06 2021-09-24 帕夫控股有限公司 对地静止的浮动平台

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FR2323823A1 (fr) * 1975-09-11 1977-04-08 Metalliques Entrepr Cie Fse Perfectionnements apportes aux procedes et dispositifs pour assurer l'ancrage, sur un fond marin, de plates-formes de type off-shore

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US3165898A (en) * 1962-06-11 1965-01-19 Continental Oil Co Off-shore oil drilling apparatus
US3360810A (en) * 1964-05-28 1968-01-02 Shell Oil Co Floating reservoir vessel of the displacement type
US3429128A (en) * 1967-04-21 1969-02-25 Chicago Bridge & Iron Co Offshore storage structure

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US2402790A (en) * 1944-11-21 1946-06-25 Egbert R Vorenkamp Marine oil tank
US3165898A (en) * 1962-06-11 1965-01-19 Continental Oil Co Off-shore oil drilling apparatus
FR1338500A (fr) * 1962-08-13 1963-09-27 Dispositif pour l'exécution de piles en eau profonde
US3360810A (en) * 1964-05-28 1968-01-02 Shell Oil Co Floating reservoir vessel of the displacement type
US3429128A (en) * 1967-04-21 1969-02-25 Chicago Bridge & Iron Co Offshore storage structure

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961489A (en) * 1972-05-02 1976-06-08 Olav Mo Method for placing a floating structure on the sea bed
US3914947A (en) * 1972-09-15 1975-10-28 Doris Dev Richesse Sous Marine Subaquatic structure
US3999395A (en) * 1973-04-26 1976-12-28 Ab Vattenbyggnadsbyran Support arrangement for a construction
US3950805A (en) * 1974-01-14 1976-04-20 Parson, Brinkerhoff, Quade & Douglas, Inc. Combination providing safety berthing, unloading of oil, and conduit carriage to refineries on land, of large deep-sea-requiring tankers
US3921558A (en) * 1974-09-16 1975-11-25 Vickers Ltd Floatable vessel
US4045968A (en) * 1974-12-24 1977-09-06 Kajima Corporation Offshore platform and method for its installation
FR2313508A1 (fr) * 1974-12-31 1976-12-31 Doris Dev Richesse Sous Marine Dispositif protegeant contre les affouillements le pied d'un ouvrage reposant sur le fond d'une nappe d'eau
US4019332A (en) * 1974-12-31 1977-04-26 C. G. Doris Devices for protecting the bases of structures immersed in a volume of water against undermining
US3946568A (en) * 1975-03-24 1976-03-30 Sigurd Heien Offshore oil production platform
US4000624A (en) * 1975-06-10 1977-01-04 Lin Offshore Engineering, Inc. Multi-component offshore platform
US4114392A (en) * 1976-06-24 1978-09-19 Compagnie Generale Pour Les Developpements Operationnels Des Richesses Sous-Marines Platform structure for maritime installations
US4170429A (en) * 1976-09-29 1979-10-09 Compagnie Generale Pour Les Developpements Operationnels Des Richesses Sous-Marines "C.G. Doris" Installation for inspecting and repairing installations in deep water
US4371292A (en) * 1979-07-02 1983-02-01 Kabushiki Kaisha Meiji Gomu Kasei Gravity structure
EP0071297A1 (en) * 1981-07-23 1983-02-09 Ingenieursbureau H. Veth B.V. A tower for forming a drilling and/or production island
FR2566023A1 (fr) * 1984-06-14 1985-12-20 Dziewolski Richard Plate-forme marine, notamment destinee a former une base de loisirs
EP0168297A1 (fr) * 1984-06-14 1986-01-15 Richard Dziewolski Plate-forme marine, notamment destinée à former une base de loisirs
US4674916A (en) * 1984-06-14 1987-06-23 Richard Dziewolski Offshore platform designed in particular to constitute a pleasure center
US4749309A (en) * 1985-10-23 1988-06-07 Norwegian Contractors Offshore platform structure of reinforced concrete and a method of producing same
US5224962A (en) * 1991-06-18 1993-07-06 Norwegian Contractors A.S. Method and apparatus for submersion and installation of fundament structures on the sea bottom
US5379559A (en) * 1991-11-29 1995-01-10 Niimura; Masateru Semisubmersible building
US5639186A (en) * 1992-07-03 1997-06-17 Ferrari; Lorenzo Water funnel
US5980159A (en) * 1994-12-09 1999-11-09 Kazim; Jenan Marine stabilising system and method
WO1997017496A1 (en) * 1995-11-06 1997-05-15 British Gas Plc Offshore exploration or production operation
US6276876B1 (en) 1995-11-06 2001-08-21 Bg Plc Offshore exploration or production operation
RU2139220C1 (ru) * 1995-11-06 1999-10-10 Би Джи плс Установка и способ для обеспечения буровых работ в открытом море
GB2306920B (en) * 1995-11-06 2000-01-12 British Gas Plc Offshore exploration or production operation
WO1998039550A1 (en) * 1997-03-05 1998-09-11 Norsk Hydro Asa Structure for the production of oil and/or gas at sea
EP1398268A1 (en) 2002-08-29 2004-03-17 Shimon Strizhakov Floating residential structure
US20100074692A1 (en) * 2006-09-11 2010-03-25 Mark E Ehrhardt Open-Sea Berth LNG Import Terminal
US20090269136A1 (en) * 2008-04-24 2009-10-29 Chen Su-Chin Hooked Collar for Piers and Bridge including the same
US7823240B2 (en) * 2008-04-24 2010-11-02 Chen Su-Chin Hooked collar for piers and bridge including the same
US20110305523A1 (en) * 2008-06-20 2011-12-15 Seatower As Support structure for use in the offshore wind farm industry
WO2010143976A3 (en) * 2009-06-10 2011-03-03 Seatower As A foundation, a method of manufacturing the foundation, and a method of installing the foundation on a seabed
US20110188945A1 (en) * 2010-02-02 2011-08-04 Rune Hartkopf Support structure for supporting an offshore wind turbine
US8684630B2 (en) * 2010-07-22 2014-04-01 Mostafa H. Mahmoud Underwater reinforced concrete silo for oil drilling and production applications
US20120020742A1 (en) * 2010-07-22 2012-01-26 Mahmoud Mostafa H Underwater Reinforced Concrete Silo for Oil Drilling and Production Applications
EP2420441A3 (de) * 2010-08-20 2012-08-15 IMPaC Offshore Engineering GmbH Offshore-Anordnung und Verfahren zur Installation einer Offshore-Anordnung
CN102514691A (zh) * 2011-12-07 2012-06-27 段静明 海上安全建筑
ES2593263A1 (es) * 2015-06-05 2016-12-07 Iberdrola Renovables Energía, S.A. Sistema de cimentación por gravedad para la instalación de aerogeneradores o instalaciones offshore y procedimiento para la instalación de un sistema de cimentación de aerogeneradores o instalaciones offshore
KR20210057800A (ko) * 2018-07-06 2021-05-21 파브 홀딩 에이에스 정지 플로팅 플랫폼
CN113439054A (zh) * 2018-07-06 2021-09-24 帕夫控股有限公司 对地静止的浮动平台
US20220063773A1 (en) * 2018-07-06 2022-03-03 Pav Holding As Geostationary floating platform
EP3817975A4 (en) * 2018-07-06 2022-04-20 PAV Holding AS A geostationary floating platform
US11878777B2 (en) * 2018-07-06 2024-01-23 Stationmar As Geostationary floating platform

Also Published As

Publication number Publication date
IT975155B (it) 1974-07-20
GB1374158A (en) 1974-11-13
AU456257B2 (en) 1974-12-12
JPS5123083B2 (enrdf_load_stackoverflow) 1976-07-14
NL7213069A (enrdf_load_stackoverflow) 1973-04-17
JPS4847103A (enrdf_load_stackoverflow) 1973-07-04
AU4572272A (en) 1974-03-07
CA955763A (en) 1974-10-08

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