EP0959182B1 - Plate-forme marine auto-élévatrice et son procédé d'installation - Google Patents
Plate-forme marine auto-élévatrice et son procédé d'installation Download PDFInfo
- 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
Links
Images
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.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
- Bridges Or Land Bridges (AREA)
- Earth Drilling (AREA)
Description
- les figures 1 et 2 sont des vues schématiques, en élévation et en plan respectivement, d'un premier mode de réalisation de la plate-forme suivant l'invention,
- les figures 3A à 3F illustrent les différentes phases successives d'un procédé d'installation suivant l'invention de la plate-forme des figures 1 et 2, et
- les figures 4 à 11 représentent diverses variantes de la plate-forme suivant l'invention.
Claims (17)
- Plate-forme marine auto-élévatrice, du type qui comprend a) un pont-coque flottable (1) supportant des équipements (5, 6, 7), b) au moins trois colonnes (2i) mobiles verticalement à travers le pont (1) et s'appuyant sur le fond marin (3) pour supporter le pont (1) au-dessus de la surface (4) de l'eau, c) des moyens de flottaison (10i;18i) disposés pour transmettre audit pont-coque (1) la poussée d'Archimède qui leur est appliquée, de manière à relever ledit pont-coque (1) par déplacement vertical depuis une position de flottaison jusqu'à une hauteur prédéterminée au-dessus de la surface de l'eau (4) et d) des moyens pour bloquer la position verticale du pont (1) quand celui-ci est placé à ladite hauteur prédéterminée par lesdits moyens de flottaison, caractérisée en ce que la flottabilité dudit pont-coque (1) est telle qu'elle permet la mise en flottaison de ladite plate-forme, colonnes (2i) relevées.
- Plate-forme conforme à la revendication 1, caractérisée en ce que lesdites colonnes (2i) sont constituées chacune de premier (10i) et deuxième (11i) éléments coulissant télescopiquement l'un dans l'autre et solidaires du pont (1) et du fond marin (3), respectivement.
- Plate-forme conforme à la revendication 2, caractérisée en ce que les moyens de flottaison sont constitués par une pluralité de flotteurs (10i) mobiles chacun dans le deuxième élément (11i) d'une colonne télescopique.
- Plate-forme conforme à la revendication 3, caractérisée en ce que lesdits flotteurs (10i) sont solidaires chacun du premier élément de ladite colonne.
- Plate-forme conforme à la revendication 1, caractérisée en ce que lesdits moyens de flottaison sont constitués par une pluralité de flotteurs (10i) montés chacun à coulissement vertical sur une des colonnes (2i) de support du pont, lesdits flotteurs (10i) pouvant être désolidarisés dudit pont (1) après l'installation de celui-ci (figures 6, 8).
- Plate-forme conforme à la revendication 5, caractérisée en ce que lesdits flotteurs (10i) sont de forme torique et traversés chacun par une desdites colonnes (2i) (figure 8).
- Plate-forme conforme à la revendication 1, caractérisée en ce que lesdits moyens de flottaison sont constitués par au moins un flotteur (18i) monté à coulissement vertical sur une barge (19) de support temporaire du pont (figure 9).
- Plate-forme conforme à l'une quelconque des revendications 1 à 7, caractérisée en ce que lesdits moyens de flottaison (10i; 18i) sont équipés de moyens de ballastage/déballastage.
- Plate-forme conforme à la revendication 2, caractérisée en ce que lesdites colonnes télescopiques (2i) intègrent des moyens d'arrêt (17i) de leur déploiement.
- Plate-forme conforme à la revendication 2, caractérisée en ce que le premier élément (10i) d'une colonne télescopique (2i) présente une section droite inférieure à celle du deuxième élément (11i), dans la partie (10'i) qui émerge au-dessus de la surface de l'eau (figures 5, 6).
- Plate-forme conforme à l'une quelconque des revendications 1 à 10, caractérisée en ce qu'au moins une partie desdites colonnes (2i) prend la forme d'une structure en treillis métallique.
- Plate-forme conforme à l'une quelconque des revendications 1 à 11, caractérisée en ce qu'elle comprend une embase (20; 21) solidarisant les colonnes au niveau du fond marin (3).
- Plate-forme conforme à la revendication 12, caractérisée en ce qu'elle comprend un compartiment de ballastage et/ou de stockage de produits, ménagé dans ladite embase (21).
- Application de la plate-forme conforme à l'une quelconque des revendications 1 à 13, à l'exploration ou l'exploitation d'un champ pétrolier sous-marin.
- Procédé d'installation d'une plate-forme conforme à l'une quelconque des revendications 1 à 13, suivant lequel a) grâce à la flottabilité du pont, on remorque la plate-forme en flottaison jusqu'à son site final d'installation, colonnes (2i) relevées, et b) on fait descendre l'extrémité basse desdites colonnes (2i) à travers le pont (1) jusqu'au fond marin (3), caractérisé en ce que c) on déballaste les moyens de flottaison (10i; 18i) de manière que ceux-ci transmettent au pont (1) la poussée d'Archimède qu'ils subissent jusqu'à ce que cette poussée amène le pont (1) à ladite hauteur (H) prédéterminée au-dessus de la surface (4) de l'eau et d) on bloque le pont (1) sur ses colonnes (2i) de support à ladite hauteur (H) prédéterminée.
- Procédé conforme à la revendication 15, caractérisé en ce que, après le blocage du pont (1), on coule les moyens de flottaison par ballastage (figures 6, 8).
- Procédé conforme à la revendication 15, caractérisé en ce que, après le blocage du pont (1), on évacue les moyens (18i) de flottaison (figure 9).
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 (fr) | 1999-11-24 |
EP0959182B1 true EP0959182B1 (fr) | 2003-04-02 |
Family
ID=9526566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990401196 Expired - Fee Related EP0959182B1 (fr) | 1998-05-20 | 1999-05-18 | Plate-forme marine auto-élévatrice et son procédé d'installation |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0959182B1 (fr) |
FR (1) | FR2778931B1 (fr) |
Cited By (4)
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 (fr) | 2009-04-03 | 2010-10-06 | AREVA Energietechnik GmbH | Système de refroidissement pour une station de transformation électrique, notamment pour une éolienne |
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)
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 |
WO2019049143A1 (fr) * | 2017-09-07 | 2019-03-14 | Sea Top Homes Ltd. | Structure habitable pour environnements marins |
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)
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 |
-
1998
- 1998-05-20 FR FR9806402A patent/FR2778931B1/fr not_active Expired - Fee Related
-
1999
- 1999-05-18 EP EP19990401196 patent/EP0959182B1/fr not_active Expired - Fee Related
Cited By (7)
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 (fr) | 2009-03-26 | 2010-10-06 | AREVA Energietechnik GmbH | Station de transformation électrique liée à la mer, notamment pour une éolienne |
EP2237384A2 (fr) | 2009-04-03 | 2010-10-06 | AREVA Energietechnik GmbH | Système de refroidissement pour une station de transformation électrique, notamment pour une éolienne |
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 (fr) | 2010-05-04 | 2011-11-10 | Siemens Aktiengesellschaft | Bâti de base pour une plate-forme offshore à mise en place automatique |
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 |
EP0959182A1 (fr) | 1999-11-24 |
FR2778931A1 (fr) | 1999-11-26 |
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