EP1716293A1 - Structure for transporting, installing and dismantling the elements of a fixed oil platform and methods for using said structure - Google Patents
Structure for transporting, installing and dismantling the elements of a fixed oil platform and methods for using said structureInfo
- Publication number
- EP1716293A1 EP1716293A1 EP04816494A EP04816494A EP1716293A1 EP 1716293 A1 EP1716293 A1 EP 1716293A1 EP 04816494 A EP04816494 A EP 04816494A EP 04816494 A EP04816494 A EP 04816494A EP 1716293 A1 EP1716293 A1 EP 1716293A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shuttle
- bridge
- hull
- support column
- lifting
- 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.)
- Granted
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
- B63B35/003—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for for transporting very large loads, e.g. offshore structure modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B77/00—Transporting or installing offshore structures on site using buoyancy forces, e.g. using semi-submersible barges, ballasting the structure or transporting of oil-and-gas platforms
-
- 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
- B63B35/28—Barges or lighters
-
- 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
-
- 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
- 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
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
-
- 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
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
- E02B17/0818—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with racks actuated by pinions
-
- 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
- E02B2017/0052—Removal or dismantling of offshore structures from their offshore location
-
- 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
Definitions
- the present invention relates to a structure for transporting, installing and dismantling a fixed petroleum platform for exploitation at sea, comprising framework elements formed in particular by a bridge and at least one support column. It further relates to methods of transport, installation and dismantling of the framework elements of a fixed oil platform.
- a fixed petroleum platform which includes a bridge carrying in particular the operating equipment and the living quarters. The bridge is supported by a support column anchored on the seabed. So far, there are two main methods of transporting, installing and dismantling the frame elements of a fixed oil platform.
- the first method consists in using lifting cranes mounted on barges to deposit the support column on the seabed and to transfer the deck from the platform of the transport boat to this support column.
- This method which is the most widely used to date, has limitations.
- the first of these limitations is the capacity of the lifting cranes, which can impose the construction of the bridge in several elements, which significantly increases the cost of manufacturing this bridge and the cost of installing and dismantling the bridge. of the oil rig.
- the second limitation lies in the fact that this method requires having a relatively large favorable time window in order to be able to carry out the various transfer operations at sea in good conditions. Thus, this method is difficult to apply without a considerable increase in cost in areas where the time windows are relatively short, such as in the North Sea.
- the second method consists of installing the support column on the seabed by lifting cranes and installing the deck of the oil platform in one piece on the support column by floating it above it. Then, the bridge is placed on this support column either by a ballasting / deballasting system, or by a mechanical system.
- a ballasting system the deck of the platform is supported either by a floating support constituted for example by a barge, pontoons or by a floating support in the shape of a U, or by means of a structure associated with this floating support.
- the superstructure can be ballasted or deballasted, it is known to use for dismantling the deck of the oil platform, the deballasting of the floating support and the ballasting of the superstructure.
- ballasting or deballasting have drawbacks which mainly reside in the fact that they impose a complex structure at the level of the caissons or the pumps and a very precise control of filling and emptying of the caissons to maintain the stability of the floating support. during the operation.
- the speed of the operation depends on the ballasting and load shedding capacity of these boxes of the floating supports which is generally relatively low so that the speed of the operation is thereby limited in particular when the superstructure is anchored on the seabed. .
- ballasting / deballasting system is the use of a mechanical system to raise or lower the platform bridge. Petroleum form. These systems allow the installation or dismantling of the oil platform bridge to be carried out more quickly than the systems previously mentioned.
- a system which comprises two barges supporting the deck of the oil platform by means of two pivoting structures.
- winches and cables is used to ensure the stability of the system and to control the descent and ascent of the deck of the oil platform. By operating these winches, we control the distance of the barges thus allowing the ascent or descent of the bridge.
- WO 03/080425 also discloses a structure for transporting, installing and dismantling a bridge of a fixed oil platform which comprises a floating hull in the shape of a "U" and a shuttle for supporting the bridge and movable along the legs by the shell.
- the object of the invention is to propose a structure for transporting, installing or dismantling a fixed petroleum platform for exploitation at sea which is designed to simplify and reduce the duration of dismantling of said platform, while by allowing significant time savings and avoiding all risks of environmental pollution and increasing the safety of the personnel responsible for carrying out the various operations.
- the subject of the invention is a structure for dismantling and transporting a fixed oil platform for exploitation in sea comprising framework elements formed in particular by a bridge and at least one support column, said structure comprising: - a floating hull in the shape of a "U" equipped with at least three lifting legs of this hull and adapted to take support on the seabed, each lifting leg being associated with mechanical displacement means housed in a supporting frame of said hull, and - a shuttle movable along the lifting legs and intended to move one of the frame elements of the platform -form, characterized in that the shuttle is formed of at least three elements each associated with a lifting leg and each comprising, on the one hand, mechanical drive means on the corresponding lifting leg independently of the shell of the structure and, on the other hand, means of connection with the framework element to be moved from the platform.
- each element of the shuttle comprises a vertical guide branch on the corresponding supporting frame of the hull and comprising at its upper part a horizontal branch for supporting the mechanical means for driving said element on the corresponding leg
- the mechanical drive means of each element comprise, on the one hand, two opposite plates carried by each vertical member of the corresponding lifting leg and each comprising, on each lateral face, a series of teeth and, on the other hand, at least two opposite assemblies, carried by the horizontal branch of said element and each formed by a pinion driven in rotation and cooperating with one of the series of teeth
- the means of connection with the framework element formed by the platform bridge comprise at least one horizontal support plate for this bridge and disposed at the lower part of the branch vertical of each element of the shuttle
- the means of connection with the framework element formed by a support column of the platform comprise, at the level of each element of the shuttle, a linear and vertical traction member, formed by a chain or a cable and two locking assemblies of said traction member, one of said assemblies being carried by said element and the other of these
- the invention also relates to a method of dismantling and transport as well as a method of transport and installation of a frame element of a fixed oil platform, formed by a bridge.
- the subject of the invention is also a method of dismantling and transport as well as a method of transport and installation of a framework element of a fixed oil platform, formed by a section of a support column. .
- the invention will be better understood on reading the description which follows, given solely by way of example and made with reference to the appended drawings, in which: - FIG. 1 is a schematic elevation view of a fixed oil platform in the operating position, - FIG. 2 is a schematic perspective view of a transport, installation and dismantling structure in accordance with the invention, - FIG.
- FIG. 3 is a schematic side view of an element of the shuttle of the structure according to the invention
- FIG. 4 is a sectional view along line 4-4 of FIG. 3
- - Fig. 5 is a sectional view along line 5-5 of FIG. 3
- - Fig. 6 is a schematic perspective view of a locking assembly of a linear traction member and equipping the structure according to the invention
- - Fig. 7 is a schematic top view of the structure according to the invention
- - Figs. 8A to 8H are diagrams showing the different stages of the method of dismantling and transporting a bridge of a fixed oil platform by means of the structure according to the invention
- FIGS. 9A to 9K are diagrams showing the different stages of the dismantling and transport process of a support column of a fixed oil platform by means of a structure according to the invention.
- Fig. 1 there is shown schematically a fixed oil platform designated as a whole by the reference 1 and comprising framework elements formed in particular by a bridge 2 provided with the operating equipment and usual living quarters and a support column 3 on which the bridge 2 rests.
- the base of this column 3 is anchored to the seabed 4 by anchoring members 5.
- a structure is used designated by the general reference 10 and shown schematically in FIG. 2.
- the general dimensions of the structure as well as the proportions between the various elements making up this structure 10 have not necessarily been respected in order to simplify the understanding of the drawing.
- the structure 10 comprises a floating hull 11 in the shape of a "U” fitted with lifting legs 12 of this hull 11 and adapted to bear on the seabed 4.
- the hull 11 has two lateral portions 11a and a connecting portion 11b connecting the two lateral portions 11a.
- the shell 11 is equipped with three lifting legs 12 distributed in a triangle, one leg 12 being placed on each lateral portion 11a and one leg 12 being placed on the connecting portion 11b.
- the shell 11 can be equipped with four lifting legs 12 arranged in pairs on each lateral branch 11a of said shell 11.
- Each leg 12 ends, at its lower end, by a shoe 13 intended to bear on the seabed 4.
- each of these legs 12 has, in this embodiment, a triangular section.
- These legs 12 can also have a square or circular section.
- Each leg 12 is formed of three frames 14 connected together by a lattice of metal beams 15. As shown in Figs. 3 and 4, each leg 12 is associated with mechanical means 20 for moving the shell 11. For each leg 12, the mechanical means 20 are housed in a support frame 16, also called by specialists "Jack-house” , which is supported by the shell 11. As shown in these Figs. 3 and 4, each member 14 of each leg 12 has two opposite plates 21 each comprising, on each side face, a series of teeth 22 forming with the two members 14 a double rack.
- the mechanical displacement means 20 of the shell 11 comprise several assemblies 25 distributed on either side of each plate 21, according to the height of the latter.
- Each assembly 25 comprises a geared motor group 26 ensuring the drive of a pinion 27 which meshes with a series of teeth 22 of the corresponding plate 21.
- the two series of teeth 22 of each plate 21 are associated with six pinions 27 each driven in rotation by a geared motor group 26.
- the structure 10 also includes a shuttle designated by the general reference 30 which is movable along legs 12 independently of the shell 11 of the structure 10 and which is intended to move the framework elements of the platform 1, that is to say either the bridge 2, or the support column 3, as will be seen later.
- the shuttle 30 is composed of independent elements 31, the number of which corresponds to the number of legs 12 of the structure 10.
- the shuttle 30 consists of three independent elements 31, each associated with a lifting leg 12.
- each element 31 of the shuttle 30 comprises mechanical means 40 for driving on the corresponding lifting leg 12, independently of the shell 11 of the structure 10, as well as means of connection with the framework element 2 or 3 to be moved from the platform
- the element 31 comprises a vertical branch 32 for guiding on the support frame 16 of the shell 11 and which is therefore in abutment on a vertical wall 16a of this support frame 16.
- the element 31 also includes a horizontal branch 33 which comprises a central opening 34 for the passage of the corresponding leg 12.
- This horizontal branch 33 is disposed at the upper part of the vertical branch 32 and supports the mechanical means 40 for driving said element 31 on the leg 12.
- the mechanical means 40 for driving each element 31 on the corresponding leg 12 operate independently mechanical means 20 for moving the shell 11 and these means 40 of all the elements 31 operate in synchronization with each other so as to obtain the same movement of each element 31 on the corresponding leg 12.
- the mechanical means 40 for moving each element 31 of the shuttle 30 comprise several assemblies 41 distributed on either side of each plate 21 of the frame 14, according to the height of the latter.
- Each assembly 41 comprises a geared motor group 42 ensuring the drive of a pinion 43 which meshes with a series of teeth 22 of the corresponding plate 21.
- the two series of teeth 22 of each plate 21 are associated with four pinions 43 each driven in rotation by a geared motor group 42.
- the vertical wall 16a of the supporting frame 16 forming a guide for the vertical displacement of the corresponding element 31 is extended, at its upper part, by a vertical plate 17 on which the element 31 slides so as to increase the height vertical displacement of this element 31.
- each element 31 of the shuttle 30 with the frame element 2 or 3 to be moved are for each of said elements 31 of two kinds.
- the connecting means associated with an element 31 of the shuttle 30 is constituted by a horizontal plate 50 for supporting the bridge 2 during its transport, as will be seen later.
- the second of these means intended to move the support column 3 is constituted by a linear and vertical traction member 51, formed by a chain or a cable.
- the traction member 51 is constituted by a chain.
- the chain 51 can be wound on a drum 52 placed in the shell 11 of the structure 10 and comprises a first rising part 51a which crosses the supporting frame 16 of the shell 11, the horizontal branch 33 of the element 31 and opens at the upper part of the vertical branch 31 of the element 30.
- the chain 51 passes over a deflection pulley 53 and has a descending part 51b which crosses the vertical branch 32 of the element 31 and runs along the shell 11 where it is guided by a pulley 54 fixed to this shell 11.
- the end of the chain 51 is equipped with a hooking system 55, of known type, on the support column 3 during its movement.
- the chain 51 is associated with two locking assemblies 60 and
- the locking assembly 60 is formed of two sub-assemblies, respectively 61a and 61b, identical and symmetrical.
- the first sub-assembly 61a is formed by a lock 62a pivotally mounted on a base 63a around a horizontal axis 64a carried by the base 63a.
- the tilting of the lock 62a between a raised position and a lowered position is controlled by a jack 65a, for example hydraulic or pneumatic, one end of which is secured to the base 63a and the other end of which is secured to the lock 62a.
- the second sub-assembly 61b is constituted by a lock 62b mounted tiltably on a base 63b around a horizontal axis 64b carried by said base 63b.
- the tilting of the lock 62b between a lowered position and a raised position is controlled by a jack 65b, for example hydraulic or pneumatic, one end of which is secured to the base 63b and the other end of which is secured to the lock 62b.
- the opening of the "U" of the shell 11 of the structure 10 can be closed off by an independent branch 70 which optionally carries a crane 71 making it possible to move modules of the oil platform 1 or of another platform shape next to which the transport structure 10 can be installed.
- this branch 70 can be installed by a barge, not shown, ballastable / deballastable and can be locked, then unlocked from the hull 11 of the structure 10.
- the transport of the deck 2 of the oil platform 1 by the structure 10 between an operating site and a quay of a port is produced in the following manner.
- the structure 10 without the complementary branch 70 is brought by floating below the bridge 2 of the platform 1 by positioning the support column 3 of this bridge 2 in the space in the shape of "U" formed between the lateral portions 11a of the shell 11.
- the lifting legs 12 are in the retracted position and the shoes 13 are arranged below the shell 11.
- the horizontal branches 50 of the elements 31 of the shuttle 30 are in low position substantially at the level of the shell 11, as shown in FIG. 2.
- the geared motor groups 26 and 42, respectively of the shell 11 and of the elements 31 of the shuttle 30, are actuated to rotate the pinions 27 and 43 which mesh with the series of teeth 22 of the plates 21 of each lifting leg 12 in order to bring the hooves 13 into contact with the seabed 4, as shown in FIG. 8B.
- the hull 11 and the elements 31 of the shuttle 30 move upwards along the legs 12, under the effect of the drive in rotation of the pinions 27 and 43 which mesh with the series of teeth 22 of the plates 21 of the lifting legs 12.
- the elements 31 of the shuttle 30 are applied against the underside of the deck 2 and the drive of the pinions 27 and 43 is stopped (Fig. 8C).
- the first consists in locking the elements 31 of the shuttle 30 on the lifting legs 12, in bringing the hull 11 into flotation in order to reduce the forces in these lifting legs 12 and the seabed 4, in separating the support column 3 from the bridge 2 and to lift the elements 31 of the shuttle 30 by the pinions 43 which mesh with the series of teeth 22, as shown in FIG. 8E.
- the elements 31 of the shuttle 30 may not be lifted by the pinions 43, but locked on the lifting legs 12.
- Lifting elements 31 and the bridge 11 can then be carried out passively during the ascent of these lifting legs 12.
- the second variant consists in locking the elements 31 of the shuttle 30 on the lifting legs 12, cutting a section of the support column 3 of sufficient length, to remove this section in order to separate the bridge 2 from the rest of the support column 3 and to bring the hull 11 into flotation.
- the third consists of separating the support column 3 from the bridge 2, lifting the elements 31 of the shuttle 30 by means of the pinions 43 which mesh with the series of teeth 22, then locking these elements 31 on lifting legs 12 and, finally, lower the hull 11 into flotation (Fig. 8D).
- the fourth variant consists in separating the support column 3 from the deck 2, lifting the elements 31 of the shuttle 3 and the hull 11, locking these elements 31 on the lifting legs 12 and bringing the hull 11 into flotation.
- the pinions 27 are still driven in rotation which causes, by reaction, due to the depression of the hull 11 in the water, the lifting of the lifting legs 12 (Fig. 8E ).
- the hull 11 supporting the deck 2 via the shuttle 30 is released from the operating site on which the support column 3 is still in place.
- the elements 31 are unlocked from the lifting legs 12 and are lowered by the drive in the opposite direction of the pinions 43 which mesh with the series of teeth 22 to bring these elements 31 supporting the bridge 2 substantially to the level of the hull 11 ( Fig. 8F).
- the structure 10 transports the deck 2 by flotation, as shown in FIG. 8G. During this transport, the lateral stabilization of the bridge 2 on the elements 31 of the shuttle 30 can be ensured by jacks, not shown, which are in contact with the lateral faces of this bridge 2.
- the structure 10 according to the invention can also be used for the installation of a bridge 2 on a support column 3 by carrying out substantially the same operations in a reverse direction.
- the structure 10 also allows the dismantling of a support column 3.
- the structure 10 After having removed the bridge 2 from the support column 3, the structure 10 is brought by floating around the support column 3, as shown in FIG. 9A. Then, the gear motor groups 26 and 42 are actuated to rotate the pinions 27 and 43 which mesh with the series of teeth 22 of the plates 21 of each lifting leg 12 in order to bring the shoes 13 into contact with the bottom. sailor 4. As soon as the hooves 13 are in contact with the seabed 4, the hull 11 and the elements 31 of the shuttle 30 move upwards, along the legs 12, under the effect of the rotational drive of the pinions 27 and 43 which mesh with the series of teeth 22. The shell 11 and the elements 31 of the shuttle 30 are thus positioned above the water level.
- the free ends of the chains 51 are connected by the attachment systems 55 to the support column 3 and this support column 3 is separated at level A (FIG. 9B), from its part anchored in the seabed 4.
- the end upper section of the support column 3 is attached by cables 56 to the shell 11 and these cables 56 are wound on drums 57 so as to allow their extension.
- the locking assembly 60 of each element 31 of the shuttle 30 is actuated by tilting the locks so as to secure the chains 51 and, therefore, the support column 3 of these elements 31.
- the locking assemblies 65 are in the open position to allow the chains 51 to slide.
- the elements 31 of the shuttle 30 are raised by rotating the pinions 43 by means of the geared motors groups 42 which mesh with the series of teeth 22 of the plates 21 of each lifting leg 12.
- the section of the support column 3 is also raised.
- the elements 31 of the shuttle 30 are first of all guided towards the vertical wall 16a of the supporting frame 16 of the shell 11 and by the plates 17, as shown in FIG. 9C.
- the locking assemblies 65 are actuated in order to lock the chains 51 and to secure these chains 51 to the shell 11.
- the locking assemblies 60 are opened by tilting the latches of so as to release the chains 51 from the elements 31 of the shuttle 30.
- These elements 31 are lowered so as to bring them back substantially to the level of the shell 11, as shown in FIG. 9D.
- the chains 51 are again secured to the elements 31 by locking the assemblies 60 and these chains 51 are released from the shell 11 by opening the assemblies 65.
- the elements 31 of the shuttle 30 are lifted so as to also lift the section of the column support 3 and these operations are repeated to gradually lift this section, as shown in FIG. 9E.
- the elements 31 of the shuttle 30 carrying the section of the support column 3 are brought substantially to the level of the shell 11 (FIG. 9F) and the assembly formed by the shuttle 30 and the shell 11 is lowered to bring this shell 11 in buoyancy, as shown in FIG. 9G.
- the legs 12 are raised and the structure 10 carrying the support column 3 is removed from the operating site by flotation (Fig. 9G).
- the structure 10 carrying the section of the support column 3 is brought by flotation to a site for loading this section on a barge 80.
- the lifting legs 12 are applied to the seabed 4 by rotating the pinions 27 and 43 by the geared motors 26 and 42 and when the lifting legs 12 are in contact with the seabed 4, the hull 11 and the elements 31 of the shuttle 30 are lifted in order to bring the lower end of the section of the support column 3 above the water level as shown in Fig. 9H.
- the barge 80 is brought below this section and said section is placed on the barge 80, then the chains 51 and the cables 56 are disconnected from the section of the support column 3 (Fig. 91).
- the hull 11 is then brought into flotation (Fig.
- the legs 12 are raised to allow the structure 10 to be used for a new transfer operation of the remaining part of the support column 3.
- the barge 80 carrying the section of the support column 3 is brought to a dismantling quay and this section is transferred to this quay, as shown in FIG. 9K.
- the structure 10 can also be used to remove the lower part of the support column 3 or, if possible, to remove the whole of the support column 3 in a single operation.
- this structure 10 can also be used for the installation of a support column 3 of an oil platform on an exploitation site by carrying out substantially the same operations in reverse. Generally, the order of certain stages of the dismantling of the bridge or of the support column can be reversed according to the conditions of dismantling.
- the structure according to the invention has the advantage of being able to transport both the bridge and the support column of an oil platform directly from the operating site to a fixed site where disassembly can be carried out safely, without risk pollution of the marine environment or vice versa between a fixed site and an operating site.
- the various stages of transfer and transport are carried out without any ballasting operation, thus making it possible to achieve a significant saving of time which is appreciable in regions where the atmospheric conditions are very rapidly changing.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Transportation (AREA)
- Architecture (AREA)
- Earth Drilling (AREA)
- Bridges Or Land Bridges (AREA)
- Ship Loading And Unloading (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07002269A EP1798342B1 (en) | 2004-01-28 | 2004-12-30 | Device for dismantling and transporting of an offshore platform |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0400806A FR2865484B1 (en) | 2004-01-28 | 2004-01-28 | STRUCTURE FOR TRANSPORTING, INSTALLING AND DISMANTLING THE ELEMENTS OF A FIXED PETROLEUM PLATFORM AND METHODS OF IMPLEMENTING SUCH A STRUCTURE |
PCT/FR2004/003418 WO2005083183A1 (en) | 2004-01-28 | 2004-12-30 | Structure for transporting, installing and dismantling the elements of a fixed oil platform and methods for using said structure |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07002269A Division EP1798342B1 (en) | 2004-01-28 | 2004-12-30 | Device for dismantling and transporting of an offshore platform |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1716293A1 true EP1716293A1 (en) | 2006-11-02 |
EP1716293B1 EP1716293B1 (en) | 2008-08-13 |
Family
ID=34717471
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04816494A Not-in-force EP1716293B1 (en) | 2004-01-28 | 2004-12-30 | Method and Device for dismanteling an oil platform |
EP07002269A Not-in-force EP1798342B1 (en) | 2004-01-28 | 2004-12-30 | Device for dismantling and transporting of an offshore platform |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07002269A Not-in-force EP1798342B1 (en) | 2004-01-28 | 2004-12-30 | Device for dismantling and transporting of an offshore platform |
Country Status (10)
Country | Link |
---|---|
US (1) | US8070388B2 (en) |
EP (2) | EP1716293B1 (en) |
KR (1) | KR101230424B1 (en) |
AT (2) | ATE404739T1 (en) |
AU (1) | AU2004316316B2 (en) |
BR (1) | BRPI0418459B1 (en) |
DE (1) | DE602004015846D1 (en) |
EA (1) | EA008616B1 (en) |
FR (1) | FR2865484B1 (en) |
WO (1) | WO2005083183A1 (en) |
Families Citing this family (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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2004
- 2004-01-28 FR FR0400806A patent/FR2865484B1/en not_active Expired - Fee Related
- 2004-12-30 EP EP04816494A patent/EP1716293B1/en not_active Not-in-force
- 2004-12-30 AT AT04816494T patent/ATE404739T1/en not_active IP Right Cessation
- 2004-12-30 EP EP07002269A patent/EP1798342B1/en not_active Not-in-force
- 2004-12-30 AT AT07002269T patent/ATE538256T1/en active
- 2004-12-30 US US10/587,589 patent/US8070388B2/en not_active Expired - Fee Related
- 2004-12-30 WO PCT/FR2004/003418 patent/WO2005083183A1/en active IP Right Grant
- 2004-12-30 KR KR1020067015248A patent/KR101230424B1/en not_active IP Right Cessation
- 2004-12-30 DE DE602004015846T patent/DE602004015846D1/en not_active Expired - Fee Related
- 2004-12-30 BR BRPI0418459A patent/BRPI0418459B1/en not_active IP Right Cessation
- 2004-12-30 AU AU2004316316A patent/AU2004316316B2/en not_active Ceased
- 2004-12-30 EA EA200601376A patent/EA008616B1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
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See references of WO2005083183A1 * |
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EP1798342A3 (en) | 2008-11-19 |
KR101230424B1 (en) | 2013-02-06 |
ATE538256T1 (en) | 2012-01-15 |
EP1798342A2 (en) | 2007-06-20 |
EP1798342B1 (en) | 2011-12-21 |
WO2005083183A1 (en) | 2005-09-09 |
BRPI0418459A (en) | 2007-06-05 |
FR2865484B1 (en) | 2006-05-19 |
ATE404739T1 (en) | 2008-08-15 |
AU2004316316A1 (en) | 2005-09-09 |
US8070388B2 (en) | 2011-12-06 |
US20080131209A1 (en) | 2008-06-05 |
KR20070006723A (en) | 2007-01-11 |
AU2004316316B2 (en) | 2010-03-11 |
BRPI0418459B1 (en) | 2015-10-20 |
EA008616B1 (en) | 2007-06-29 |
DE602004015846D1 (en) | 2008-09-25 |
EA200601376A1 (en) | 2007-02-27 |
FR2865484A1 (en) | 2005-07-29 |
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