WO2014037710A1 - Apparatus - Google Patents

Apparatus Download PDF

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Publication number
WO2014037710A1
WO2014037710A1 PCT/GB2013/052309 GB2013052309W WO2014037710A1 WO 2014037710 A1 WO2014037710 A1 WO 2014037710A1 GB 2013052309 W GB2013052309 W GB 2013052309W WO 2014037710 A1 WO2014037710 A1 WO 2014037710A1
Authority
WO
WIPO (PCT)
Prior art keywords
buoyancy
density
support legs
top structure
support
Prior art date
Application number
PCT/GB2013/052309
Other languages
French (fr)
Inventor
Rachel NICHOLLS-LEE
Original Assignee
Mojo Maritime Limited
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 Mojo Maritime Limited filed Critical Mojo Maritime Limited
Publication of WO2014037710A1 publication Critical patent/WO2014037710A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/107—Semi-submersibles; Small waterline area multiple hull vessels and the like, e.g. SWATH
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
    • B63B2001/128—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising underwater connectors between the hulls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/14—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected resiliently or having means for actively varying hull shape or configuration
    • B63B2001/145—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected resiliently or having means for actively varying hull shape or configuration having means for actively varying hull shape or configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B5/00—Hulls characterised by their construction of non-metallic material
    • B63B5/24—Hulls characterised by their construction of non-metallic material made predominantly of plastics
    • B63B2005/242—Hulls characterised by their construction of non-metallic material made predominantly of plastics made of a composite of plastics and other structural materials, e.g. wood or metal
    • B63B2005/245—Hulls characterised by their construction of non-metallic material made predominantly of plastics made of a composite of plastics and other structural materials, e.g. wood or metal made of a composite of plastics and metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • B63B2039/067—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water effecting motion dampening by means of fixed or movable resistance bodies, e.g. by bilge keels

Definitions

  • This invention relates to a floating platform for use in off-shore applications.
  • Conventional floating platforms are significantly affected by adverse sea conditions which result in a relatively high degree of motion of the platform, which has operational implications.
  • apparatus comprising a top structure for supporting one or more items, at least one buoyancy device connected to the top structure and a weighted device movable relative to the at least one buoyancy device, wherein the buoyancy device is comprised of a material of a first density and the weighted device is comprised of a material of a second density, the second density being significantly greater than the first density, said buoyancy device including a plurality of buoyancy columns and said top structure being fixedly connected to the plurality of buoyancy columns at an upper end region thereof, and wherein the weighted device includes a plurality of support legs and a primary ballast mass connected to a lower end region of the support legs, each column having a support in relation to which the support legs are moveable, the support of each column being in the form of externally mounted guiding means which guide the movement of the support legs.
  • apparatus comprising a top structure for supporting one or more items, at least one buoyancy device connected to the top structure and a weighted device movable relative to the at least one buoyancy device, wherein the buoyancy device is comprised of a material of a first density and the weighted device is comprised of a material of a second density, the second density being significantly greater than the first density, said buoyancy device including a plurality of buoyancy columns and said top structure being fixedly connected to the plurality of buoyancy columns at an upper end region thereof, and wherein the weighted device includes a plurality of support legs and a primary ballast mass connected to a lower end region of the support legs, each column having a support in relation to which the support legs According to a third aspect of the present invention there is provided apparatus comprising a top structure for supporting one or more items, at least one buoyancy device connected to the top structure and a weighted device movable relative to the at least one buoyancy device, wherein the buoyancy device
  • Figure 1 shows side views of a floating platform structure with a weighted device in the fully retracted and fully extended position
  • Figure 2 is a view similar to Figure 1 , but with the floating platform being semi- submersed,
  • Figure 3 shows a perspective view of an alternate arrangement of the weighted device
  • Figure 4 is a view similar to Figure 3, but of a further alternative to the arrangement of the weighted device, and
  • Figure 5 shows respective perspective views of an embodiment of the floating platform with the weighted device in the fully retracted and fully extended position.
  • a semi-submersible floating platform structure 2 of a substantially triangular plan-form comprises a deck structure 4 fixedly connected to a plurality of buoyancy columns 6 at an upper end region thereof.
  • a support structure 8 retains the columns 6 at the required spaced-apart distance.
  • a movable weighted device 12 is movable relative to the buoyancy columns 6 and includes a plurality of support legs 14 which are movable and a primary ballast mass 16 connected to a lower end region of the support legs 14.
  • each column 6 has some support in relation to which the support legs 14 are moveable, for example, each column 6 may be provided with an internal chamber 10 in which the support legs 14 are moveable.
  • the columns 6 may include externally mounted guiding means 15 which guide the movement of the support legs 14, as shown in Figure 3 or, alternatively, the support legs 14 may be telescopic, as shown in Figure 4.
  • the support structures 8 assist to enable smooth extension and retraction of the weighted device 12 in and out of the columns 6.
  • the buoyancy columns 6 and preferably the deck structure 4 are made from a material having a first density and advantageously made of a lightweight material, such as fibre-reinforced composite materials which are high-performance, lightweight materials that are strong enough to take harsh loading conditions, or aluminium alloys.
  • the weighted device is made from a material of a second density which is substantially greater than the first density, for example, a relatively heavy metallic material such as steel and lead.
  • a material of a second density which is substantially greater than the first density
  • a relatively heavy metallic material such as steel and lead.
  • the platform 2 is utilised for environmental measurement, with, for example, a LIDAR (Light Detection And Ranging) device mounted on the deck structure 4.
  • LIDAR Light Detection And Ranging
  • Conventional environmental measurement techniques for marine environments utilise a so-called offshore met mast, which are large and extremely expensive structures to install.
  • Other known measurement/monitoring devices may also, of course, be mounted to the platform structure 4 or other parts of the floating platform 2. For example, subsea current/wake measurements are a possibility.
  • the deck structure 4 may also have a separate gimballed platform installed (not shown) to further decrease motions to the supported equipment, such as the LIDAR device.
  • the moveable weighted device 12 having the support legs 14 extendable and retractable from inside the buoyancy columns 6, on the base of which the principal ballast mass 16 is attached. In this way, the centre of gravity CG is thus maintained as low as possible in relation to the static centre of buoyancy CB in order to achieve the lowest motion response of the platform 2 in the open sea.
  • the weighted device can be extended and retracted relative to the columns 6 and so be 'tuned' to the specific site of installation to the prevailing sea conditions, such as wave frequency, so that the optimal response of the platform 2 to a multitude of sea states can be achieved.
  • the movable weighted device 12 enables an option to tension moorings holding the platform 2 in position.
  • the moorings would be attached with the weighted device 12 in a fully extended position, and subsequent partial retraction of the weighted device 12 would create tension in the moorings, fixing the platform in place.
  • the platform 2 can also be slack moored using gravity base or positive engagement arrangements for ease of deployment and reduction in installation costs and time.
  • the platform 2 can be towed into position with the weighted device 12 in a fully retracted position, having a shallow draft in the water, with full extension of the weighted device 12 occurring once on site to create maximum stability.
  • the moveable weighted object (when in the fully retracted position) enables road transportation of the platform 2 between launch/recovery and/or construction/storage sites.
  • a second embodiment of the invention utilises a larger scaled version of the platform 2 for offshore energy extraction.
  • This may comprise mounting one or more wind turbine devices 18 to the deck structure 4 along with any other necessary equipment 20, as shown in Figure 5.
  • the advantage of such an arrangement is that in offshore locations where wind speeds can reach relatively high levels a floating low motion platform 2 can be provided to extract the energy available by way of the turbine devices 18 which remain relatively stable in such conditions.
  • the platform 2 is of modular design for ease and reduced cost of construction.
  • the triangular nature of the platform 2 is advantageous in view of the requirement for a corresponding 3 point mooring system which is relatively easy to install.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)

Abstract

Apparatus comprising a top structure for supporting one or more items, at least one buoyancy device connected to the top structure and a weighted device movable relative to the at least one buoyancy device, wherein the buoyancy device is comprised of a material of a first density and the weighted device is comprised of a material of a second density, the second density being significantly greater than the first density.

Description

APPARATUS
This invention relates to a floating platform for use in off-shore applications. Conventional floating platforms are significantly affected by adverse sea conditions which result in a relatively high degree of motion of the platform, which has operational implications.
According to a first aspect of the present invention, there is provided apparatus comprising a top structure for supporting one or more items, at least one buoyancy device connected to the top structure and a weighted device movable relative to the at least one buoyancy device, wherein the buoyancy device is comprised of a material of a first density and the weighted device is comprised of a material of a second density, the second density being significantly greater than the first density, said buoyancy device including a plurality of buoyancy columns and said top structure being fixedly connected to the plurality of buoyancy columns at an upper end region thereof, and wherein the weighted device includes a plurality of support legs and a primary ballast mass connected to a lower end region of the support legs, each column having a support in relation to which the support legs are moveable, the support of each column being in the form of externally mounted guiding means which guide the movement of the support legs.
According to a second aspect of the present invention, there is provided apparatus comprising a top structure for supporting one or more items, at least one buoyancy device connected to the top structure and a weighted device movable relative to the at least one buoyancy device, wherein the buoyancy device is comprised of a material of a first density and the weighted device is comprised of a material of a second density, the second density being significantly greater than the first density, said buoyancy device including a plurality of buoyancy columns and said top structure being fixedly connected to the plurality of buoyancy columns at an upper end region thereof, and wherein the weighted device includes a plurality of support legs and a primary ballast mass connected to a lower end region of the support legs, each column having a support in relation to which the support legs According to a third aspect of the present invention there is provided apparatus comprising a top structure for supporting one or more items, at least one buoyancy device connected to the top structure and a weighted device movable relative to the at least one buoyancy device, wherein the buoyancy device is comprised of a material of a first density and the weighted device is comprised of a material of a second density, the second density being significantly greater than the first density.
Owing to these aspects of the invention, it is possible to provide a floating platform which is responsive to a multitude of sea states by adjustment of the position of the weighted device relative to the at least one buoyancy device.
In order that the present invention can be clearly and completely disclosed, reference will now be made, by way of example only, to the accompanying drawings, in which:-
Figure 1 shows side views of a floating platform structure with a weighted device in the fully retracted and fully extended position,
Figure 2 is a view similar to Figure 1 , but with the floating platform being semi- submersed,
Figure 3 shows a perspective view of an alternate arrangement of the weighted device,
Figure 4 is a view similar to Figure 3, but of a further alternative to the arrangement of the weighted device, and
Figure 5 shows respective perspective views of an embodiment of the floating platform with the weighted device in the fully retracted and fully extended position.
Referring to Figures 1 and 2, a semi-submersible floating platform structure 2 of a substantially triangular plan-form comprises a deck structure 4 fixedly connected to a plurality of buoyancy columns 6 at an upper end region thereof. At the opposite lower end region of the columns 6, a support structure 8 retains the columns 6 at the required spaced-apart distance. A movable weighted device 12 is movable relative to the buoyancy columns 6 and includes a plurality of support legs 14 which are movable and a primary ballast mass 16 connected to a lower end region of the support legs 14. Preferably each column 6 has some support in relation to which the support legs 14 are moveable, for example, each column 6 may be provided with an internal chamber 10 in which the support legs 14 are moveable. Of course, other arrangements are possible in which an internal chamber is not used. For example, the columns 6 may include externally mounted guiding means 15 which guide the movement of the support legs 14, as shown in Figure 3 or, alternatively, the support legs 14 may be telescopic, as shown in Figure 4. The support structures 8 assist to enable smooth extension and retraction of the weighted device 12 in and out of the columns 6. The buoyancy columns 6 and preferably the deck structure 4 are made from a material having a first density and advantageously made of a lightweight material, such as fibre-reinforced composite materials which are high-performance, lightweight materials that are strong enough to take harsh loading conditions, or aluminium alloys. The weighted device is made from a material of a second density which is substantially greater than the first density, for example, a relatively heavy metallic material such as steel and lead. The combination of the lightweight deck structure and the use of a plurality of buoyancy columns 6 reduce the waterplane area of the platform 2, thereby decreasing the motions caused by perturbations of the surface of the sea.
In a first embodiment of the invention, the platform 2 is utilised for environmental measurement, with, for example, a LIDAR (Light Detection And Ranging) device mounted on the deck structure 4. Conventional environmental measurement techniques for marine environments utilise a so-called offshore met mast, which are large and extremely expensive structures to install. Other known measurement/monitoring devices may also, of course, be mounted to the platform structure 4 or other parts of the floating platform 2. For example, subsea current/wake measurements are a possibility. The deck structure 4 may also have a separate gimballed platform installed (not shown) to further decrease motions to the supported equipment, such as the LIDAR device. The moveable weighted device 12 having the support legs 14 extendable and retractable from inside the buoyancy columns 6, on the base of which the principal ballast mass 16 is attached. In this way, the centre of gravity CG is thus maintained as low as possible in relation to the static centre of buoyancy CB in order to achieve the lowest motion response of the platform 2 in the open sea. Such an arrangement produces an advantageously low motion floating platform 2. The weighted device can be extended and retracted relative to the columns 6 and so be 'tuned' to the specific site of installation to the prevailing sea conditions, such as wave frequency, so that the optimal response of the platform 2 to a multitude of sea states can be achieved. In addition, the movable weighted device 12 enables an option to tension moorings holding the platform 2 in position. In this case, the moorings would be attached with the weighted device 12 in a fully extended position, and subsequent partial retraction of the weighted device 12 would create tension in the moorings, fixing the platform in place. The platform 2 can also be slack moored using gravity base or positive engagement arrangements for ease of deployment and reduction in installation costs and time.
For installation, the platform 2 can be towed into position with the weighted device 12 in a fully retracted position, having a shallow draft in the water, with full extension of the weighted device 12 occurring once on site to create maximum stability. For small scale versions of the platform 2, such as the environmental measurement platform discussed above, the moveable weighted object (when in the fully retracted position) enables road transportation of the platform 2 between launch/recovery and/or construction/storage sites.
A second embodiment of the invention utilises a larger scaled version of the platform 2 for offshore energy extraction. This may comprise mounting one or more wind turbine devices 18 to the deck structure 4 along with any other necessary equipment 20, as shown in Figure 5. The advantage of such an arrangement is that in offshore locations where wind speeds can reach relatively high levels a floating low motion platform 2 can be provided to extract the energy available by way of the turbine devices 18 which remain relatively stable in such conditions.
The platform 2 is of modular design for ease and reduced cost of construction. The triangular nature of the platform 2 is advantageous in view of the requirement for a corresponding 3 point mooring system which is relatively easy to install.

Claims

1 . Apparatus comprising a top structure for supporting one or more items, at least one buoyancy device connected to the top structure and a weighted device movable relative to the at least one buoyancy device, wherein the buoyancy device is comprised of a material of a first density and the weighted device is comprised of a material of a second density, the second density being significantly greater than the first density, said buoyancy device including a plurality of buoyancy columns and said top structure being fixedly connected to the plurality of buoyancy columns at an upper end region thereof, and wherein the weighted device includes a plurality of support legs and a primary ballast mass connected to a lower end region of the support legs, each column having a support in relation to which the support legs are moveable, the support of each column being in the form of externally mounted guiding means which guide the movement of the support legs.
2. Apparatus comprising a top structure for supporting one or more items, at least one buoyancy device connected to the top structure and a weighted device movable relative to the at least one buoyancy device, wherein the buoyancy device is comprised of a material of a first density and the weighted device is comprised of a material of a second density, the second density being significantly greater than the first density, said buoyancy device including a plurality of buoyancy columns and said top structure being fixedly connected to the plurality of buoyancy columns at an upper end region thereof, and wherein the weighted device includes a plurality of support legs and a primary ballast mass connected to a lower end region of the support legs, each column having a support in relation to which the support legs are moveable, the support of each column being provided by telescopic support legs.
3. Apparatus comprising a top structure for supporting one or more items, at least one buoyancy device connected to the top structure and a weighted device movable relative to the at least one buoyancy device, wherein the buoyancy device is comprised of a material of a first density and the weighted device is comprised of a material of a second density, the second density being significantly greater than the first density.
4. Apparatus according to claim 1 , 2 or 3, wherein said apparatus is a semi- submersible floating platform structure.
5. Apparatus according to any preceding claim, and being of a substantially triangular plan-form.
6. Apparatus according to any preceding claim, wherein said top structure comprises a deck structure.
7. Apparatus according to any one of claims 3 to 6, wherein said buoyancy device includes a plurality of buoyancy columns and said top structure is fixedly connected to the plurality of buoyancy columns at an upper end region thereof.
8. Apparatus according to any one of claims 3 to 7, wherein the weighted device includes a plurality of support legs and a primary ballast mass connected to a lower end region of the support legs.
9. Apparatus according to claim 8 as appended to claim 7, wherein each column has a support in relation to which the support legs are moveable.
10. Apparatus according to claim 9, wherein the support of each column is in the form of an internal chamber in which the support legs are moveable.
1 1 . Apparatus according to claim 9, wherein the support of each column is in the form of externally mounted guiding means which guide the movement of the support legs.
12. Apparatus according to claim 9, wherein the support of each column is provided by telescopic support legs.
13. Apparatus according to any preceding claim, wherein the top structure and the buoyancy device are made from a fibre-reinforced composite material.
14. Apparatus according to any preceding claim, wherein the top structure and the buoyancy device are made from aluminium alloys.
15. Apparatus according to any preceding claim, wherein the weighted device is made from a relatively heavy metallic material.
16. Apparatus according to any one of claims 6 to 15, and further comprising a LIDAR (Light Detection And Ranging) device mounted on the deck structure.
17. Apparatus according to any preceding claim, and further comprising a gimballed platform at the top structure.
18. Apparatus according to any one of claims 6 to 17, and further comprising one or more wind turbine devices mounted to the deck structure.
PCT/GB2013/052309 2012-09-04 2013-09-03 Apparatus WO2014037710A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1215796.2 2012-09-04
GBGB1215796.2A GB201215796D0 (en) 2012-09-04 2012-09-04 Apparatus

Publications (1)

Publication Number Publication Date
WO2014037710A1 true WO2014037710A1 (en) 2014-03-13

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GB (1) GB201215796D0 (en)
WO (1) WO2014037710A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107472474A (en) * 2016-11-22 2017-12-15 哈尔滨工业大学深圳研究生院 A kind of mobile ballast leveling control device of floating blower fan
WO2019224535A1 (en) * 2018-05-22 2019-11-28 Floating Energy Systems Limited Wind turbine & method for installing a wind turbine
CN111880192A (en) * 2020-07-31 2020-11-03 湖南国天电子科技有限公司 Ocean monitoring buoy device and system based on water surface and underwater target early warning

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DE19835727A1 (en) * 1998-08-07 2000-02-10 Basf Ag Composite element for ship and bridge construction includes polymer layer between two metal layers
US6023806A (en) * 1996-09-30 2000-02-15 Martin Marietta Materials, Inc. Modular polymer matrix composite support structure and methods of constructing same
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US6761124B1 (en) * 2002-09-28 2004-07-13 Nagan Srinivasan Column-stabilized floating structures with truss pontoons
US6942427B1 (en) * 2003-05-03 2005-09-13 Nagan Srinivasan Column-stabilized floating structure with telescopic keel tank for offshore applications and method of installation
WO2011084530A2 (en) * 2009-12-16 2011-07-14 Clear Path Energy, Llc Floating underwater support structure
CN102616344A (en) * 2012-03-22 2012-08-01 中国海洋石油总公司 Heavy draught truss type floating platform

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US6023806A (en) * 1996-09-30 2000-02-15 Martin Marietta Materials, Inc. Modular polymer matrix composite support structure and methods of constructing same
WO1998021029A1 (en) * 1996-11-13 1998-05-22 Fern Investments Limited Composite steel structural plastic sandwich plate systems
DE19835727A1 (en) * 1998-08-07 2000-02-10 Basf Ag Composite element for ship and bridge construction includes polymer layer between two metal layers
WO2002031270A1 (en) * 2000-10-10 2002-04-18 Cso Aker Maritime, Inc. Heave suppressed offshore drilling and production platform
US6761124B1 (en) * 2002-09-28 2004-07-13 Nagan Srinivasan Column-stabilized floating structures with truss pontoons
US6942427B1 (en) * 2003-05-03 2005-09-13 Nagan Srinivasan Column-stabilized floating structure with telescopic keel tank for offshore applications and method of installation
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107472474A (en) * 2016-11-22 2017-12-15 哈尔滨工业大学深圳研究生院 A kind of mobile ballast leveling control device of floating blower fan
WO2019224535A1 (en) * 2018-05-22 2019-11-28 Floating Energy Systems Limited Wind turbine & method for installing a wind turbine
CN112135772A (en) * 2018-05-22 2020-12-25 浮动能源系统有限公司 Wind turbine and method of installing a wind turbine
CN112135772B (en) * 2018-05-22 2022-07-15 浮动能源系统有限公司 Wind turbine for offshore deployment
CN111880192A (en) * 2020-07-31 2020-11-03 湖南国天电子科技有限公司 Ocean monitoring buoy device and system based on water surface and underwater target early warning
CN111880192B (en) * 2020-07-31 2021-06-29 湖南国天电子科技有限公司 Ocean monitoring buoy device and system based on water surface and underwater target early warning

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Publication number Publication date
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