EP0959182B1 - Selbsthebende Plattform und Verfahren zur Installation derselben - Google Patents

Selbsthebende Plattform und Verfahren zur Installation derselben Download PDF

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Publication number
EP0959182B1
EP0959182B1 EP19990401196 EP99401196A EP0959182B1 EP 0959182 B1 EP0959182 B1 EP 0959182B1 EP 19990401196 EP19990401196 EP 19990401196 EP 99401196 A EP99401196 A EP 99401196A EP 0959182 B1 EP0959182 B1 EP 0959182B1
Authority
EP
European Patent Office
Prior art keywords
deck
columns
platform according
platform
floats
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.)
Expired - Fee Related
Application number
EP19990401196
Other languages
English (en)
French (fr)
Other versions
EP0959182A1 (de
Inventor
Dominique Michel
Philippe André Dumas
Vincent Frédéric Paul Foglia
Stanislas Jean Cyran
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.)
DORIS ENGINEERING
Original Assignee
DORIS ENGINEERING
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 DORIS ENGINEERING filed Critical DORIS ENGINEERING
Publication of EP0959182A1 publication Critical patent/EP0959182A1/de
Application granted granted Critical
Publication of EP0959182B1 publication Critical patent/EP0959182B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • 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
    • 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
    • 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
    • E02B2017/006—Platforms with supporting legs with lattice style 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
    • E02B2017/0082—Spudcans, skirts or extended feet
    • 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

  • the present invention relates to a platform self-elevating marine as defined in the preamble of claim 1.
  • this bridge To reassemble the bridge on the support columns this bridge, from a position in which the bridge is floating on the surface of the water, and while the columns are supported on the seabed, we have between the bridge and the columns of mechanical means, of the type pinion / rack for example, powered by motors. We understand that, given the very high weight of the bridge and of the equipment he wears, these mechanical means must be very powerful and therefore burden the cost of construction of such a platform.
  • the object of the present invention is precisely to build a self-elevating marine platform of the type described in the preamble to this description, the construction cost is not heavily burdened by the presence of expensive mechanical lifting means.
  • the present invention also aims to achieve such a platform that can be fully deployed on its final installation site, so without step intermediary in another place, and which can be transported and reinstalled on another site, the bottom marine is possibly located at a different depth.
  • the present invention also aims to provide a installation process for this platform.
  • a self-elevating marine platform of the type which comprises a) a bridge supporting equipment, b) at least three columns vertically movable across the bridge and leaning on the seabed to support the bridge over the water surface, c) means for vertically move the bridge over the surface of water and d) means for blocking the vertical position of the bridge when it is placed at a height predetermined by said displacement means, this platform being remarkable in that said bridge is a buoyant hull deck and in that said means of displacement are flotation means arranged for transmit the buoyancy buoyancy to said hull deck is applied to them, so as to raise said hull deck from a float position to said height predetermined.
  • the columns are each made up of first and second telescopically sliding elements, one in the other and in solidarity with the bridge and the seabed respectively.
  • the flotation means are made up by a plurality of movable floats each sliding in the second element of a telescopic column.
  • the flotation means are constituted by a plurality of floats each mounted to slide vertical on one of the columns of the bridge support, said floats which can be detached from said deck after installation.
  • the floats are toroidal and each crossed by one of said columns.
  • a method is provided according to which a) tows the floating platform to its site final installation, raised columns, b) we do descend the lower end of each of said columns to across the bridge to the seabed, this process being remarkable in that c) we unballast the means of flotation so that these transmit to the bridge the Archimedes' push they undergo until this thrust brings the bridge to said predetermined height above of the surface of the water and d) the bridge is blocked on its support columns at said predetermined height.
  • the embodiment shown of the platform according to the invention comprises a bridge 1 and at least three, and preferably four, support columns 2 i (i from 1 to 4).
  • Deck 1 is of the "hull deck” type having positive buoyancy, raised columns, as will be seen below.
  • the platform is shown deployed on its final installation site, the columns 2 i being supported by their lower ends on a seabed 3, while the bridge 1 is fixed on the upper ends of these columns, at a height predetermined H above the surface 4 of the water, guaranteeing a suitable freeboard for equipment located on the deck, such as a derrick 5, a crane 6 and a structure 7 comprising the usual equipment of a platform form of exploration or exploitation of an oil field located on the seabed 3, unit for processing products extracted from the field, living quarters, helicopter landing platform, etc.
  • the anchoring of the feet, or bases, of the columns 2 i in the seabed 3 can be reinforced by any means known for this purpose, such as stability floors 8 1 , 8 2 , spades, etc.
  • the columns 2 i of the platform can slide in respective complementary cylindrical openings 9 i with a vertical axis, provided at the four corners of the bridge 1 (see FIG. 2).
  • This vertical sliding capacity of the columns is used in the process according to the invention for installing the platform, as will be seen below.
  • the bridge is fixed to the upper ends of the columns 2 i by any means known for this purpose in the art, such as welding, bolting, cementing of the ring finger, etc.
  • the columns 2 i are telescopic, each comprising first (10 i ) and second (11 i ) cylindrical and coaxial elements sliding one inside the other.
  • the elements 10 i and 11 i are respectively integral with the bridge 1 and the bottom 3, the elements 10 i sliding in the elements 11 i .
  • the upper element 10 i of each column takes the form of a float, that is to say of a sealed compartment, cylindrical in this case, capable of being ballasted or deballasted with sea water by conventional ballasting / deballasting means (not shown) constituted by pumps and suitably arranged water intake / discharge conduits.
  • each column is, on the contrary, in communication with sea water through openings (not shown). It follows that an Archimedes thrust is exerted on the floats 10 i , equal to the weight of the volume of water displaced by the floats, these floats thus constituting means for moving the bridge upwards, under the effect of Archimedes' thrust which they transmit to the bridge.
  • the height H of the bridge 1 can be adjusted above the surface of the water, to a predetermined value guaranteeing a suitable draft for the bridge.
  • This adjustment is obtained by adjusting the ballasting of the floats 10 i , as described below in conjunction with FIGS. 3A to 3F to which reference is now made to describe the method of installing the platform according to invention.
  • the invention makes it possible to achieve the announced objectives, namely to ensure an economic deployment of a jack-up platform, the economy being obtained thanks to the implementation of the applied Archimedes thrust to floats 10 i arranged to lift said bridge, said floats 10 i themselves forming part of the support columns 2 i of the platform and thus fulfilling a double function of lifting and definitive support of the bridge.
  • This avoids having to have between the bridge and each of the columns expensive motor and transmission devices, pinion / rack for example, to raise the bridge to its final working position.
  • the deployment of the platform according to the invention takes place entirely on the final installation site.
  • the platform can be easily transported from one site to another and reinstalled on the latter, even if the depth of the bottom of this site would be different, the height of the columns can be easily modified by changing the level of connection between elements 10 i and 11 i , by adding an element complementary to element 11 i , or by other known means.
  • FIG. 4 a variant of the platform of FIGS. 1 and 2 has been shown, in which the lower element 11 i is no longer of solid cylindrical shape, but has a structure in metallic mesh , possible structure since this lower element does not have to be sealed and only acts as a guide for the upper element 10 i .
  • the variant of FIG. 5 differs from the platform of FIG. 1 in that the part 10 ′ i of an upper column element 10 i which projects from the surface 4 of the water in the final position of the platform, has a cross section smaller than that of the part of the element 10 i which is below the surface of the water and which acts as a float. This reduces the swell effect on these columns.
  • the part of the upper column element 10 i which projects beyond the surface of the water can be made of wire mesh, just as the lower element 11 i could also be.
  • FIG. 7 The variant of FIG. 7 is similar to that of FIG. 5, from which it is distinguished in that means 17 i are formed at the top of the lower elements 11 i of the columns for stopping the floats 10 i during their ascent, this blocking determining the height H of deck 1 above the water.
  • These stop means 17 i are constituted by conformal conical skirts formed respectively on each float 10 i and at the top of the upper column element 11 i in which the float slides.
  • the outlet for the skirts can be located under the surface 4 of the water, as shown for column 2 1 or, preferably, above this surface, as shown for column 2 2 .
  • the columns 2 i are not telescopic.
  • the floats 10 i for raising the deck 1 are toroidal in shape, elongated vertically, and each crossed by one of the columns. They are movable between a high position, reached by deballasting and suitable for bringing the deck 1 to the height H above the water, as shown for the float 10 1 , and a low position bearing on the foot of the column. , as shown for float 10 2 . In this last position the float releases the upper part of the column and thus reduces its size, and therefore its grip in the swell.
  • floats 18 1 , 18 2 , .. are mounted to slide vertically on a barge 19 installed between the columns 2 i .
  • This barge can then be used to ensure the buoyancy of deck 1 during the towing of the platform to its installation site. It is not necessary, then, that the deck 1 be of the buoyant "hull deck” type.
  • the deballasting of the floats 18 i makes it possible to raise the bridge to the height H.
  • the barge 19 and the floats 18 i can then be evacuated from the installation site.
  • a base secures the column bases, which are also type of those shown in Figures 1 to 7. This base improves platform stability when this is made necessary due to poorer characteristics from the seabed.
  • the base 20 is constituted by a beam trellis.
  • the base 21 takes the form of a compartment that can accommodate ballast material. This compartment can also be used to store products extracted by the platform.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Foundations (AREA)
  • Earth Drilling (AREA)

Claims (17)

  1. Selbstaufrichtende Meeresplattform, die folgendes umfasst:
    a) einen schwimmfähigen Ponton (1), der Einrichtungen (5, 6, 7) trägt, b) mindestens drei Säulen (21), die vertikal durch den Ponton (1) beweglich sind und auf dem Meeresboden (3) stehen, um den Ponton (1) über der Wasseroberfläche (4) zu halten, c) Schwimmmittel (101, 181), die angeordnet sind, um auf den Ponton (1) den hydrostatischen Auftrieb zu übertragen, der auf sie einwirkt, so dass der Ponton (1) durch vertikale Bewegung von einer Schwimmstellung bis in eine bestimmte Höhe über der Wasseroberfläche (4) gehoben wird, und d) Mittel zum Blockieren der vertikalen Stellung des Pontons (1), wenn er durch die Schwimmmittel in die bestimmte Höhe gebracht wurde, dadurch gekennzeichnet, dass die Schwimmfähigkeit des Pontons (1) so beschaffen ist, dass sie das Einschwimmen der Plattform bei angehobenen Säulen (21) gestattet.
  2. Plattform nach Anspruch 1, dadurch gekennzeichnet, dass die Säulen (21) jeweils aus einem ersten Element (101) und aus einem zweiten Element (111) bestehen, die teleskopisch ineinander gleiten und mit dem Ponton (1) bzw. mit dem Meeresboden (3) fest verbunden sind.
  3. Plattform nach Anspruch 2, dadurch gekennzeichnet, dass die Schwimmmittel aus einer Vielzahl von Schwimmern (101) bestehen, die jeweils in dem zweiten Element (111) einer teleskopischen Säule beweglich sind.
  4. Plattform nach Anspruch 3, dadurch gekennzeichnet, dass die Schwimmer (101) jeweils mit dem ersten Element der Säule fest verbunden sind.
  5. Plattform nach Anspruch 1, dadurch gekennzeichnet, dass die Schwimmmittel aus einer Vielzahl von Schwimmern (101) bestehen, die jeweils auf einer der Tragsäulen (21) des Pontons vertikal verschiebbar montiert sind, wobei die Schwimmer (101) nach der Installierung des Pontons (1) von diesem getrennt werden können (Fig. 6, 8).
  6. Plattform nach Anspruch 5, dadurch gekennzeichnet, dass die Schwimmer (101) von torischer Form sind und jeweils von einer der Säulen (21) durchsetzt werden (Fig. 8).
  7. Plattform nach Anspruch 1, dadurch gekennzeichnet, dass die Schwimmmittel aus mindestens einem Schwimmer (181) bestehen, der auf einer Barge (19) zum vorübergehenden Tragen des Pontons vertikal verschiebbar montiert ist (Fig. 9).
  8. Plattform nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Schwimmmittel (101; 181) mit Mitteln zur Ballastaufnahme/Ballastabgabe ausgerüstet sind.
  9. Plattform nach Anspruch 2, dadurch gekennzeichnet, dass in die teleskopischen Säulen (21) Mittel (171) zum Stoppen ihres Ausfahrens integriert sind.
  10. Plattform nach Anspruch 2, dadurch gekennzeichnet, dass das erste Element (101) einer teleskopischen Säule (21) in dem Teil (10'1), der über der Wasseroberfläche auftaucht, einen kleineren Querschnitt als das zweite Element (111) aufweist (Fig. 5, 6).
  11. Plattform nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass mindestens ein Teil der Säulen (21) die Form eines Metallfachwerks hat.
  12. Plattform nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass sie einen Sockel (20; 21) aufweist, der die Säulen auf Höhe des Meeresbodens (3) fest verbindet.
  13. Plattform nach Anspruch 12, dadurch gekennzeichnet, dass sie eine Ballastund/oder Produktlagerkammer aufweist, die in dem Sockel (21) vorgesehen ist.
  14. Verwendung der Plattform nach einem der Ansprüche 1 bis 13 für die Erforschung oder den Abbau eines unterseeischen Erdölfeldes.
  15. Verfahren zur Installierung einer Plattform nach einem der Ansprüche 1 bis 13, bei welchem man a) die Plattform dank der Schwimmfähigkeit des Pontons schwimmend bis zu ihrem endgültigen Installationsstandort schleppt, wobei die Säulen (21) angehoben sind, und b) das untere Ende der Säulen (21) durch den Ponton (1) hindurch bis zum Meeresboden (3) absenkt, dadurch gekennzeichnet, dass man c) die Schwimmmittel (101; 181) vom Ballast befreit, so dass sie den auf sie einwirkenden hydrostatischen Auftrieb auf den Ponton (1) übertragen, bis dieser Auftrieb den Ponton (1) in die bestimmte Höhe (H) über der Wasseroberfläche (4) bringt, und d) den Ponton (1) auf seinen Tragsäulen (21) in dieser bestimmten Höhe (H) blockiert.
  16. Verfahren nach Anspruch 15, dadurch gekennzeichnet, dass man nach der Blockierung des Pontons (1) die Schwimmmittel durch Beballastung versenkt (Fig. 6, 8).
  17. Verfahren nach Anspruch 15, dadurch gekennzeichnet, dass man nach der Blockierung des Pontons (1) die Schwimmmittel (181) abführt (Fig. 9).
EP19990401196 1998-05-20 1999-05-18 Selbsthebende Plattform und Verfahren zur Installation derselben Expired - Fee Related EP0959182B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9806402 1998-05-20
FR9806402A FR2778931B1 (fr) 1998-05-20 1998-05-20 Plate-forme marine auto-elevatrice et son procede d'installation

Publications (2)

Publication Number Publication Date
EP0959182A1 EP0959182A1 (de) 1999-11-24
EP0959182B1 true EP0959182B1 (de) 2003-04-02

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EP (1) EP0959182B1 (de)
FR (1) FR2778931B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009014427A1 (de) 2009-03-26 2010-09-30 Areva Energietechnik Gmbh Seegebundenes elektrisches Umspannwerk insbesondere für eine Windkraftanlage
EP2237384A2 (de) 2009-04-03 2010-10-06 AREVA Energietechnik GmbH Kühlsystem für ein elektrisches Umspannwerk insbesondere für eine Windkraftanlage
DE102010019908A1 (de) 2010-05-04 2011-11-10 Siemens Aktiengesellschaft Grundrahmen für eine selbstaufstellende Meeresplattform
US10196114B2 (en) 2015-05-13 2019-02-05 Crondall Energy Consultants Ltd. Floating production unit and method of installing a floating production unit

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2478752C2 (ru) * 2011-05-13 2013-04-10 Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) Мелкосидящая самоподъемная плавучая установка
CN106043611A (zh) * 2016-06-08 2016-10-26 中铁建大桥工程局集团第工程有限公司 浮式炸礁平台
US11293154B2 (en) 2017-09-07 2022-04-05 Sea Top Homes Ltd. Habitable structure for marine environments
CN114019130A (zh) * 2021-11-12 2022-02-08 浙江大京生态环境科技有限公司 一种海域出让前期勘测平台及使用方法
NL2031193B1 (en) * 2022-03-09 2023-09-18 Deawoo Eng & Construction Co Ltd Marine structure and method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001370A (en) * 1954-09-23 1961-09-26 John B Templeton Marine drilling methods and apparatus
US2960833A (en) * 1955-11-10 1960-11-22 John T Hayward Marine foundation structure
GB2314576B (en) * 1996-06-27 2000-08-16 Kvaerner Oil & Gas Ltd Offshore platform assembly

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009014427A1 (de) 2009-03-26 2010-09-30 Areva Energietechnik Gmbh Seegebundenes elektrisches Umspannwerk insbesondere für eine Windkraftanlage
EP2236815A2 (de) 2009-03-26 2010-10-06 AREVA Energietechnik GmbH Seegebundes elektrisches Umspannwerk insbesondere für eine Windkraftanlage
EP2237384A2 (de) 2009-04-03 2010-10-06 AREVA Energietechnik GmbH Kühlsystem für ein elektrisches Umspannwerk insbesondere für eine Windkraftanlage
DE102009017468A1 (de) 2009-04-03 2010-10-07 Areva Energietechnik Gmbh Kühlsystem für ein elektrisches Umspannwerk insbesondere für eine Windkraftanlage
DE102010019908A1 (de) 2010-05-04 2011-11-10 Siemens Aktiengesellschaft Grundrahmen für eine selbstaufstellende Meeresplattform
WO2011138195A1 (de) 2010-05-04 2011-11-10 Siemens Aktiengesellschaft Grundrahmen für eine selbstaufstellende meeresplattform
US10196114B2 (en) 2015-05-13 2019-02-05 Crondall Energy Consultants Ltd. Floating production unit and method of installing a floating production unit

Also Published As

Publication number Publication date
FR2778931B1 (fr) 2000-07-21
FR2778931A1 (fr) 1999-11-26
EP0959182A1 (de) 1999-11-24

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