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EP2216447A1 - Structure marine flottante avec piliers d'aspiration et plateforme reposant sur une barge encastrée entre les piliers d'aspiration et la plateforme - Google Patents

Structure marine flottante avec piliers d'aspiration et plateforme reposant sur une barge encastrée entre les piliers d'aspiration et la plateforme Download PDF

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Publication number
EP2216447A1
EP2216447A1 EP10153118A EP10153118A EP2216447A1 EP 2216447 A1 EP2216447 A1 EP 2216447A1 EP 10153118 A EP10153118 A EP 10153118A EP 10153118 A EP10153118 A EP 10153118A EP 2216447 A1 EP2216447 A1 EP 2216447A1
Authority
EP
European Patent Office
Prior art keywords
platform
marine structure
suction
water
supporting legs
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.)
Withdrawn
Application number
EP10153118A
Other languages
German (de)
English (en)
Inventor
Mark Riemers
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.)
Suction Pile Tech BV
Original Assignee
Suction Pile Tech BV
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 Suction Pile Tech BV filed Critical Suction Pile Tech BV
Publication of EP2216447A1 publication Critical patent/EP2216447A1/fr
Withdrawn legal-status Critical Current

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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
    • E02B17/021—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 with relative movement between supporting construction and platform
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • 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
    • E02B2017/0047—Methods for placing the offshore structure using a barge
    • 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
    • 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
    • E02B2017/0078—Suction piles, suction cans

Definitions

  • the invention concerns a marine structure, a method of installing a marine structure and a suction pile.
  • the invention concerns application to a so called “marginal field” i.e. an offshore field for which the predicted economical exploitation is limited to less then 10 years.
  • a suction pile is a thin walled steel cylinder, closed at at least one longitudinal end, that is located on the subsea bottom with the opposite end and penetrates the subsea bottom with the aid of a suction created within the cylinder.
  • the creation of the suction can be with the aid of a suction source, such as a pump, being on, or close to or at a distance (e.g. above the water surface, e.g. at a vessel) from the suction pile.
  • the applied level of the suction can be e.g.
  • the suction pile can easily be removed by creating an overpressure within the cylinder, e.g. by pumping in (sea) water.
  • a self installing platform applying suction piles which provide buoyancy is known from e.g. WO99/51821 (SIP1) or EP-A-1 101 872 (SIP2) of the present inventor.
  • the suction pile In stead of installing a suction pile into the under water bottom by generating a fluid pressure difference between the inside and outside of the suction pile, it is also feasible that the suction pile at least partly penetrates the under water bottom by a weight resting on it, e.g. the platform and/or a ballast body.
  • the marine structure self floating and self foundating or self installing by providing it with buoyancy and one or more suction piles.
  • the hoisting device and the plant for installing the foundation e.g. hammering device
  • the structure has buoyancy of its own, e.g. obtained by the with the structure integrated appliance that is designed to, once the structure is installed, ballast the structure. Buoyancy can also be obtained from the suction pile, which for that can be provided with a floater.
  • Said own buoyancy is preferably such that it is substantially contributing to the required buoyancy to make the structure self floating. It is preferable, if the buoyancy can be at least substantially decreased for installation purposes.
  • ballast like water.
  • ballast means for adding and possibly removing of ballast, such as between the closed and open position switcheable shutter valves in a water supplying respectively water venting opening to a ballast tank.
  • the structure Since the structure is self floating and is provided with one or more suction piles, removal after use is made easier. On the one hand in that by pressing out the suction pile, the anchoring of the structure to the underwater bottom can be removed. On the other hand in that the structure can independently rise to the water surface by the (possibly regained) buoyancy.
  • the marine structure typically will be rather large, e.g. a production platform with equipment. Due to its own weight, such marine structure is designed to be applied with a foundation of pile bodies to be pressed in the bottom.
  • the marine structure preferably has, apart from the suction piles, no floating bodies, apart from parasitic floating bodies such as air filled spaces that are normally present, such as frame tubes.
  • the marine structure according to the present invention will typically weigh not more than about 5, 000, 000 kilo, although structures with a much higher weight of e.g. 10,000,000 kilo or more are also feasible.
  • Barge preferably means at least a vessel known as such with one or more floating spaces at least substantially hermetically delimited from the environment.
  • the barge has no equipment of its own for propelling and/or directional control.
  • the marine structure is loaded onto the barge such that the suction piles penetrate the body of water into which the barge floats or are completely submerged while preferably the platform of the marine structure is at a distance above said body of water. More preferably, one or more of the following features are applied: the marine structure is loaded onto the barge in the upright orientation or the orientation equal to the operating position of the marine structure, which is typically the vertical orientation; the suction piles are completely below the water level of the body of water in which the barge floats and are preferably completely below the bottom level of the barge onto which the marine structure is loaded; the barge is present straight above at least a part of a suction pile and preferably at least a part of all suction piles; the barge with the marine structure loaded onto it is connected to a propulsion vessel, e.g.
  • a towing boat e.g. by virtue of a towing cable, and is preferably propulsed by said vessel;
  • the barge with the marine structure loaded onto it advances through the body of water into which the barge floats, preferably with a speed between 4 and 6 nautical miles per hour; from each suction pile a supporting leg extends upward;
  • the platform has a rectangular shape in top view; at each corner of the platform and possibly also at more locations along the side of the platform a supporting leg and/or suction pile is present; the platform is connected to the supporting legs by connection means that allow the platform to move along the supporting legs;
  • the supporting legs have a length of at least 20 metres (e.g.
  • each suction pile has a diameter of at least 5 metres and a height of at least 5 metres and a wall thickness of at least 1 centimetre; the longitudinal axis of the suction pile and the relevant supporting leg are substantially in line; from the circumference, seen in top view, of each suction pile one or more mutually spaced straight frame members extend upward, inclined towards the relevant supporting leg and connected to it at a distance above the suction pile, to provide a bracing; said bracings are absent at the side of the supporting leg facing the barge; the vertical distance between the top of the suction pile and the barge measures 1 or 2 or 3 metre to a maximum; the barge is clamped or sandwiched between the platform and the top of the suction piles; the barge bears onto the top of the suction piles.
  • the barge has insufficient buoyancy of its own to keep the marine structure floating, considering the prevailing safety requirements.
  • the one or more suction piles provide the additionally required buoyancy.
  • the suction pile is preferably provided with compressed air or integral floating means, preferably present inside the suction pile.
  • the floating means can at least substantially comprise a space in open communication with the surrounding water at its under side, such as the pressure space of the suction pile.
  • Fig. 1-5 show a marine structure 1 consisting of a platform 2, rectangular in top view, each corner of which having a supporting leg 3 at the lower side of which a suction pile 4 is connected.
  • the supporting legs 3 are mutually connected by braces 10, however braces 10 are not always required.
  • Each supporting leg 3 is connected to the suction pile 4 such that the longitudinal axis of both are in line.
  • suction piles 4 are at such low level beneath the water level 6, that the space between the supporting legs 3 is completely available to a barge 5, providing a floating transport means.
  • the buoyancy provided by the barge can therewith be optimised. This is also beneficial for the stability during transport across the water 6.
  • the barge 5 partly covers each suction pile 4 and is present at a small distance straight above part of each suction pile 4.
  • the supporting legs 3 are retracted such that they maximally extend above the water level 6.
  • the marine structure is at least partly supported by the barge 5 and the platform 2 is preferably close to the water surface 6. Therefor, the platform 2 preferably rests directly onto the barge 5, possibly through supports 7.
  • the barge provides all required buoyancy, or the barge and the suction piles 4 together provide the required buoyancy.
  • the supporting legs 3 and the platform 2 are mutually shifted in longitudinal direction of the supporting legs 3, such that the lower side of the supporting legs 3 move away from the platform 2.
  • Fig. 6-8 show that the supporting leg 3 is concentric or coaxially with the suction pile 4. From the radial circumference of the suction pile two straight braces extend upward, inclined towards the leg 3.
  • the marine structure can have less than four, e.g. two or three, or more than four, e.g. five or six, suction piles 4.
  • the number of supporting legs 3 is preferably equal to the number of suction piles 4, but this is not absolutely necessary.
  • three suction piles are at the corners of a structure 1 that is triangular in top view. It is not required that the suction piles and supporting legs are at the corners of the structure 1.
  • the platform 2 can be constructed and/or shaped differently.
  • the suction pile can be eccentrically connected to the relevant supporting leg 3, e.g. the supporting leg 3 is connected to the suction pile 4 at or near the circumferential edge of the suction pile 4 in which case it is feasible that the barge is present above the almost complete suction pile 4.
  • a first sub assembly comprises the suction piles 4 and possibly the lower part of the legs 3 and their mutual connecting braces 10.
  • a second sub assembly comprises the platform 2 and the supporting legs 3 or upper part of it. The first sub frame is lowered onto the water bottom such that the suction piles thereof penetrate the bottom. Then the second sub assembly is located above the first sub assembly and the first and second sub assemblies are coupled, during which operations the second sub assembly is supported by the barge 5. Then the supporting legs 3 are lifted by shifting them along the platform 2, taking the suction piles 4 with them. Now the condition shown in fig. 1-3 is obtained such that the complete marine structure is now supported by the barge 5 and can be towed to the final location.
  • the suction piles 4 and lower part of the supporting legs 3 can be installed offshore at the final location after which the platform 2, supported onto the barge 5, and top section of the legs 3, connected to the platform 2, move in between the pre installed lower part of the legs 3. Then the top section of the legs 3 are lowered onto the pre installed lower part of the legs 3 and connected with them. Then the platform 2 is lifted (while shifting along the legs 3) to the top level and the barge 5 is removed from below the platform 2 and from between the legs 3.
  • the platform is constructed with clamps, the number of which equals the number of supporting legs.
  • First the platform is located on a barge floating in the water. Then an upright supporting leg mounted to a suction pile is mated with a corresponding clamp and the clamp is closed. After all clamps are loaded with a relevant supporting leg mounted to a relevant suction pile, the condition shown in fig. 1-3 is obtained and the marine structure is ready to be towed to its final location.
  • the supporting legs are pivotably mounted, such that they can pivot from a substantially vertical position to a substantially horizontal position. In the latter position, the suction piles at their lower ends can completely extend above the water while the platform rests on a barge, such that in this position the stability during towing is assured. At the final location, the supporting legs are pivoted to their upright position such that the suction piles can be lowered to penetrate the water bottom.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
EP10153118A 2009-02-09 2010-02-09 Structure marine flottante avec piliers d'aspiration et plateforme reposant sur une barge encastrée entre les piliers d'aspiration et la plateforme Withdrawn EP2216447A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2002508 2009-02-09
NL2004212A NL2004212C2 (en) 2009-02-09 2010-02-08 Floating marine structure with suction piles and platform resting on a barge clamped between suction piles and platform.

Publications (1)

Publication Number Publication Date
EP2216447A1 true EP2216447A1 (fr) 2010-08-11

Family

ID=42136150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10153118A Withdrawn EP2216447A1 (fr) 2009-02-09 2010-02-09 Structure marine flottante avec piliers d'aspiration et plateforme reposant sur une barge encastrée entre les piliers d'aspiration et la plateforme

Country Status (2)

Country Link
EP (1) EP2216447A1 (fr)
NL (1) NL2004212C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2004443C2 (en) * 2010-03-22 2011-09-23 Suction Pile Technology B V Movable platform, assembly of a movable platform and a barge, method of installation, method of exploitation, method of re-use.
WO2014098605A1 (fr) 2012-12-21 2014-06-26 Suction Pile Technology Bv Procédé d'installation en mer, par exemple par floatover, et système
KR20160059570A (ko) 2014-11-18 2016-05-27 현대건설주식회사 해수저항 감소 및 수직도 조절을 위한 석션기초, 그 설치방법 및 인양방법
CN111252205A (zh) * 2020-03-25 2020-06-09 上海惠生海洋工程有限公司 一种浅水自安装平台及安装方法
CN113026740A (zh) * 2021-02-02 2021-06-25 中铁大桥局集团第五工程有限公司 一种用于吸力桩式工装平台的架体与吸力桩快速对接方法
CN113700029A (zh) * 2021-09-22 2021-11-26 中交第一航务工程局有限公司 吸力桩导管架漂浮运输方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107288114B (zh) * 2016-03-31 2022-12-09 周俊麟 一种小型海洋平台自升式桩腿的升降方法
CN112376565A (zh) * 2020-11-05 2021-02-19 中交第一航务工程局有限公司 海上风电直桩导向架固定施工方法和拆除施工方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138932A (en) * 1961-04-14 1964-06-30 Richfield Oil Corp Locating an offshore drilling platform
US3727414A (en) * 1971-06-28 1973-04-17 Bowden Drilling Services Ltd Off shore drilling platform construction
EP0011894B1 (fr) 1978-12-04 1984-07-04 Shell Internationale Researchmaatschappij B.V. Méthode et appareillage pour l'installation d'un élément tubulaire au fond de l'eau
GB2176827A (en) * 1985-06-19 1987-01-07 Saipem Spa Installation of the superstructure of an offshore platform
FR2604413A1 (fr) * 1986-09-26 1988-04-01 Technip Geoproduction Procede de placement d'une plate-forme de forage et d'exploitation en mer, d'un site a un autre
GB2300661B (en) 1994-01-21 1997-07-30 Johannes Rudolf Hogervorst Method and combination for installing a hollow suction pile in the bottom of a body of water
WO1999051821A1 (fr) 1998-04-02 1999-10-14 Suction Pile Technology B.V. Structure marine
EP1101872A2 (fr) 1999-11-18 2001-05-23 Suction Pile Technology B.V. Structure marine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138932A (en) * 1961-04-14 1964-06-30 Richfield Oil Corp Locating an offshore drilling platform
US3727414A (en) * 1971-06-28 1973-04-17 Bowden Drilling Services Ltd Off shore drilling platform construction
EP0011894B1 (fr) 1978-12-04 1984-07-04 Shell Internationale Researchmaatschappij B.V. Méthode et appareillage pour l'installation d'un élément tubulaire au fond de l'eau
GB2176827A (en) * 1985-06-19 1987-01-07 Saipem Spa Installation of the superstructure of an offshore platform
FR2604413A1 (fr) * 1986-09-26 1988-04-01 Technip Geoproduction Procede de placement d'une plate-forme de forage et d'exploitation en mer, d'un site a un autre
GB2300661B (en) 1994-01-21 1997-07-30 Johannes Rudolf Hogervorst Method and combination for installing a hollow suction pile in the bottom of a body of water
WO1999051821A1 (fr) 1998-04-02 1999-10-14 Suction Pile Technology B.V. Structure marine
EP1101872A2 (fr) 1999-11-18 2001-05-23 Suction Pile Technology B.V. Structure marine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2004443C2 (en) * 2010-03-22 2011-09-23 Suction Pile Technology B V Movable platform, assembly of a movable platform and a barge, method of installation, method of exploitation, method of re-use.
WO2011119025A1 (fr) * 2010-03-22 2011-09-29 Venture Production Nederland B.V. Plateforme mobile, assemblage d'une plateforme mobile et d'une barge, procédé d'installation, procédé d'exploitation, procédé de réutilisation
WO2014098605A1 (fr) 2012-12-21 2014-06-26 Suction Pile Technology Bv Procédé d'installation en mer, par exemple par floatover, et système
KR20160059570A (ko) 2014-11-18 2016-05-27 현대건설주식회사 해수저항 감소 및 수직도 조절을 위한 석션기초, 그 설치방법 및 인양방법
CN111252205A (zh) * 2020-03-25 2020-06-09 上海惠生海洋工程有限公司 一种浅水自安装平台及安装方法
CN111252205B (zh) * 2020-03-25 2024-05-17 上海惠生海洋工程有限公司 一种浅水自安装平台及安装方法
CN113026740A (zh) * 2021-02-02 2021-06-25 中铁大桥局集团第五工程有限公司 一种用于吸力桩式工装平台的架体与吸力桩快速对接方法
CN113700029A (zh) * 2021-09-22 2021-11-26 中交第一航务工程局有限公司 吸力桩导管架漂浮运输方法

Also Published As

Publication number Publication date
NL2004212A (en) 2010-08-10
NL2004212C2 (en) 2011-01-20

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