EP1204806B1 - Schwimmende träger mit einem zentralhohlraum, der aus einer vielzahl von fächern besteht - Google Patents

Schwimmende träger mit einem zentralhohlraum, der aus einer vielzahl von fächern besteht Download PDF

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Publication number
EP1204806B1
EP1204806B1 EP00956616A EP00956616A EP1204806B1 EP 1204806 B1 EP1204806 B1 EP 1204806B1 EP 00956616 A EP00956616 A EP 00956616A EP 00956616 A EP00956616 A EP 00956616A EP 1204806 B1 EP1204806 B1 EP 1204806B1
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EP
European Patent Office
Prior art keywords
riser
floating support
compartments
support according
risers
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 - Lifetime
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EP00956616A
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English (en)
French (fr)
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EP1204806A1 (de
Inventor
Michel Baylot
Michel Gassert
Xavier Rocher
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Saipem SA
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Saipem SA
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E21B43/0107—Connecting of flow lines to offshore structures
    • 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
    • B63B35/4413—Floating drilling platforms, e.g. carrying water-oil separating devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/01—Risers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling

Definitions

  • the present invention generally relates to the field of connections bottom-surface of the type comprising a vertical submarine pipe, called riser or riser, connecting the bottom of the sea to a floating support installed on the surface.
  • the floating support structure is able to carry out all the drilling, putting into production and reconditioning wells. It is also preferable that the support floating is able to successively drill several wells on the same site and then allow the production and reconditioning each of said wells.
  • This floating support comprises in anchoring means in order to remain in position despite the effects of current, winds and swell. It also usually includes means storage and processing of oil and means of unloading to oil tankers. They come to regular interval to perform the removal of production.
  • FPSO floating Production Storage Offloading
  • SPARS long vertical floating cigars held in position by catenary anchors, or TLPs ("Tension Leg Platform"), platforms tense anchor lines, said lines being generally vertical.
  • Wellheads are often spread over the entire field and production lines, as well as water injection lines and control cables, are deposited on the seabed in direction of a fixed location, on the vertical side of which the floating support is positioned on the surface.
  • the wellhead equipped with its "Christmas tree" can be installed in surface, on board the floating support. We can then perform, from a derrick installed on said floating support, all drilling operations, production and maintenance of the well throughout the life of the said well. This is called the dry wellhead.
  • the drilling rig is a tall structure that can reach 60m and possessing a lifting capacity that can exceed 500 tonnes, the means necessary to move it from one well to another and to keep it in position during well operations lead to complex and expensive structures.
  • Patent FR 2,754,011 describing a barge and a system is known from guide for riser, the latter being equipped with floats.
  • SPARs and TLPs are also equipped with a multiplicity of risers underpinned by floats consisting of cans surrounding the riser coaxially and held in position by guiding systems.
  • risers rise to the surface in a cavity central floating support called "wellbay” or bay drilling.
  • the cavity crosses the hull vertically from side to side on a height of about thirty meters, with a draft of about twenty meters; she is in general installed at the floating support axis, equidistant from its ends, because this is the area where the amplitudes of the movements and accelerations are the weakest when the ship is subject to the phenomena of roll, language and lace.
  • the floats concerned are large with, in particular a diameter greater than 5m, and a length of 10 to 20m and possess unit buoyancy up to 100 tonnes.
  • the float and the conduct are subject to the effects of swell, current, but being connected to the FPSO at the surface, are also indirectly subject to the effects of wind. This results in lateral movements and vertical lines of up to several meters riser-float-barge, especially in the area prone to swell.
  • risers are separated from each other by several meters and also several meters from the walls of the wellbay, this which leads to wellbays up to 80m in length and 20m in length width, on FPSO barges up to 350 m long, 80 m wide width and having a height at the level of the plating up to and exceed 35 m.
  • FPSO barges up to 350 m long, 80 m wide width and having a height at the level of the plating up to and exceed 35 m.
  • Such barges have a deadweight tonnage which may reach and exceed 500,000 dwt.
  • the present invention relates to the transfer of risers within the cavity, preferably central, from their production position to in a position where drilling operations as well as operations heavy maintenance of wells are carried out, that is to say from a derrick fixed relative to the floating support.
  • Well drilling is carried out at the main axis of the derrick; through a riser called “drilling riser", whose function is to guide the drill rods and contain the sludge back from the well being pierced.
  • This riser of drilling is assembled from unit lengths up to 50m, the assembly being lowered in step by step, as and when assembly said riser.
  • the portion of the riser corresponding to the slice of water is disconnected from the well at sea level and then directed towards a garage position after its length has been shortened by disassembly of one or two unit lengths. By doing so, the riser drilling remains hung, its lower end being located 50-100 m the bottom.
  • the production riser can then be assembled in the same way step by step until it reaches the entrance to the well.
  • the floats are installed in the upper part as and when laying, then the base of the production riser is finally connected to the well.
  • the well is then equipped various casings of production and "Christmas tree" of the wellhead Dry is set up.
  • These guidance systems generally include tensioning cables that make the transfer of the riser from one position to another within of the central cavity (wellbay) long and difficult to achieve, especially in which concerns moving from the production position to the position in the axis of the derrick.
  • a floating support comprising a rectangular or circular bay allowing drilling and / or exploitation by deep seabed of a group of hydrocarbon wells without it being necessary to move the drilling rig (derrick) in relation to the bridge of the structure of the floating support to be able to operate on a selected well well group, and without the need for an overhead crane to individually support and move a riser of a well selected from the group of wells, to be able to operate on the well selected.
  • the risers are fixed at intervals from each other, to a movable table that can be moved by relative to the bridge of the floating structure along a path such as the respective upper ends of the risers may be successively brought into vertical alignment with the tower.
  • the bay can have an elongated rectangular shape and the moving table is in this case rectangular, extending in the longitudinal direction of the rectangular bay and mobile in translation in its longitudinal direction. A translation of the table moving along its longitudinal axis simultaneously moves all rising columns.
  • the bay can also have a circular shape and the table mobile also a circular shape of a diameter corresponding to that the circular bay concentrically disposed thereon and mounted movably in rotation in the circular bay around the vertical axis thereof. The still a rotation of the circular table around its axis moves simultaneously all risers attached to it.
  • a disadvantage of this system is that moving the table rectangular mobile or a rotation of the mobile circular table cause a deflection of all risers relative to vertically.
  • the forces of tension or torsion on the rising columns then have a component that generates, by reaction on the floating structure, considerable effort between the floating support and said table and in the case of the circular table of couples tending to make turn said floating support structure around the axis of the table circular.
  • the rotation of the circular table around its axis submits each riser also has twisting forces.
  • FR 2747728 there is also described a platform in which the risers are grouped in a rectangular zone according to a matrix layout which, when viewed in plan, has 4 rows and 6 columns.
  • the tower which supports the apparatuses allowing the operations of drilling, production and reconditionncment of wells is mounted mobile on the deck of the platform by means of a slide system, such so that the tower can be selectively brought into vertical alignment with the top end of any of the risers.
  • the tower Since the surface wellheads at the ends upper risers must be spaced from center to center several meters, the tower must be moved over a rectangular area of relatively large area and its supporting structure linking it to the floating support shall span the two longitudinal rows of well, so that the axis of the derrick can be moved to the right of the axis of each of said wellheads on which wish to intervene.
  • a such support structure to be able to move longitudinally and transversely to the axis of the floating support will be of a magnitude and complexity, and therefore very expensive.
  • the weight of the derrick and the vertical load brought by it can reach and exceed 3500 tonnes, it will be necessary to have significant resources load balancing of the floating support, in the form for example of ballast.
  • a platform comprising a plurality of risers disposed at the inner periphery of a rectangular bay.
  • a moving crane over the bay is planned to support any riser and to bring the riser selected from its respective support at the periphery of the bay to the center of said bay in vertical alignment with a tower to allow for drilling, production or reconditioning of the well corresponding to the riser selected.
  • Such a traveling crane must have a system of tensioning capable of maintaining tension in the riser during the transfer from the production position to the position at the axis of the derrick, where will be carried out the drilling or repackaging operations of well.
  • Tensioning vertical forces to support a large riser may reach and exceed 300 or 500 tonnes or more, the The crane structure will be considerable because it will have to span completely the bay and will be able to pass under the structure of the derrick.
  • the base of said derrick will then have to be considerably enlarged and reinforced to allow free passage of the overhead crane.
  • the object of the present invention is to provide a new type of floating support in which the transfers of the riser in a position to a other within the cavity (wellbay) are simple to perform and therefore can be done safely.
  • an object of the present invention is to provide a new type of floating support in which the transfer of risers from a production position to a drilling position within the cavity can be achieved by individually moving the risers without require expensive infrastructure like a bridge crane .
  • the present invention provides a floating support which has a preferably central cavity comprising a plurality of compartments at the end of which said risers are in position production, said compartments communicating with a central channel, the end of which is a drilling rig, said compartments being arranged transversely with respect to said central channel.
  • said compartments have a longitudinal shape essentially rectangular and they are arranged parallel to each other.
  • Each compartment therefore includes a single maximum riser, installed at the closed end of the compartment and capable of being moved individually in the compartments and the central channel.
  • the buoyancy of the risers is ensured essentially, even exclusively by floats without the addition of additional tensioning, in particular by cable using a winch or hydraulic cylinder installed on the floating support.
  • the displacement of risers is greatly facilitated.
  • said compartments have a rectilinear longitudinal shape and are arranged parallel to each other, perpendicularly or at an angle to one central channel straight. They are preferably spaced apart from one another so regular.
  • said compartments and said central channel comprise a joining floor between said riser and said support floating on each bank, said junction floor defining a channel continuous substantially constant width corresponding to a distance sufficient to install a riser between its two banks and to be able to move using transfer means located on said floor of junction.
  • said joining floor is situated at an intermediate level, particularly at mid-height, between the bridge of floating stand and water level.
  • the floating support according to the present invention comprises means for transferring said risers between their position of production at the end of the compartments and the position of the derrick, transfer means for moving a said riser along said connecting floor cooperating with said risers at the level of said junction floor.
  • said transfer means cooperate with a device for holding and guiding the riser, said device ensuring the junction between said riser and said floating support.
  • said transfer means are fixed and secured to said floating support.
  • said transfer means comprise a set winches and cables connecting said winches to said riser.
  • said transfer means comprise a carriage movable along said compartments and said channel.
  • said joining floor is equipped with guide rails for guiding said transfer means or said antibioticr, especially if said transfer means are fixed, long or respectively inside said compartments and said central channel, especially at the intersection of said compartments and said central channel.
  • the antibioticr is equipped with a support which ensures its junction with the junction floor with elements of guiding, preferably arranged below said support and integral with it, for guiding said riser inside said compartments and of said central channel and, where appropriate, inside said guide rails.
  • the riser is equipped with a device for holding and guiding relative to the floating support, it is the support ensuring the joining of the holding and guiding device with the joining floor which include said guide elements.
  • the floating support according to the present invention can also have a compartment transverse to the central channel at the axis of the derrick, said compartment corresponding to a parking position of the riser.
  • said risers are equipped with bottle-shaped floats surrounding the riser coaxially with it, in the upper part of the riser, the buoyancy of the risers being ensured essentially by said floats without the addition of additional tensioning installed on the floating support.
  • the present invention also relates to a transfer method on a floating support of a riser from its production position up to its position within a drilling rig, according to which said riser is moved in said cavity of a floating support according to the invention, as it will be explained in the detailed description.
  • said riser is moved in moving said device for holding and guiding the riser relative to the floating support, itself secured to said riser.
  • the device for holding and guiding the riser relative to the floating support allows relative movements of the floating support and the riser, so as to withstand corresponding fatigue at loads of up to 10 tons, and occasional efforts extremes corresponding to loads of up to 100 tonnes, or even 200 tons or more.
  • the device for holding and guiding the riser by the floating support must be able to authorize movements longitudinals substantially vertical up to 5 meters or more.
  • the riser must remain substantially coaxial with the axis of the derrick.
  • Longitudinal axis of the riser means the vertical axis when the riser is in the rest position, that is to say not subject to movements related to the bustle of the sea.
  • This device for maintaining and guiding the riser with respect to floating support is designed to support varying efforts in the plane horizontal.
  • the rollers preferably provide guiding of the riser subjected to current loads of light loads of about 10 tons, and skids provide guidance when the riser is subjected to heavy loads in extreme conditions of implementation, especially up to 100 tons.
  • This device for maintaining and guiding the riser with respect to floating support can be set up on the floating support for to maintain and guide his position in production, or he can to be connected to said undirected transfer means from its position of production towards the axis of a drilling rig.
  • the said articulation means are preferably arranged at the level of the floor of junction between said riser and said support, located in the wall of the cavity of the floating support between the floating support deck and the water level.
  • the holding and guiding device can also be put in place on said floating support to hold and guide undit riser in position operating in a derrick installed on said floating support, plus precisely to the axis of said derrick.
  • FIG. 5 is a side view of a riser being transferred into the central channel of the cavity.
  • FIGs 1 and 5 there is shown a floating support of the type having a rectangular central cavity 1 with peripheral walls 10 in which can be positioned a plurality of risers 2.
  • the rectangular central cavity 1 comprises a floor junction 8 horizontal which ensures the junction between the risers and the support floating.
  • This junction floor 8 is located at about halfway between the water level 13 and the bridge 11 of the floating support ( Figure 5).
  • a opening in the junction floor forms a continuous channel of which both shores formed by said floor are spaced a distance substantially constant.
  • This continuous channel of substantially constant width is composed of a plurality of compartments 3 of longitudinal shape with the end of which said risers 2 are in the production position 4 and a central channel 5 of longitudinal shape, at the end of which is located 6 a drilling derrick 7, said compartments being arranged transversely with respect to said central channel 5.
  • the compartments 3 are rectangular, arranged parallel between them and transversely to the central channel 5, either perpendicularly, either on the cob, that is to say with an inclination perpendicular) to the longitudinal axis of channel 5.
  • the compartments 3 and the central channel 5 preferably have substantially same width.
  • FIG. 1 shows a view from above and in plan the connecting floor 8 of said compartments 3 and central channel 5.
  • the compartments 3 and the central channel 5 thus form channels of width substantially constant and having continuity between said positions riser in production position and the axis 6 of the derrick 7.
  • These compartments 3 communicate with the central channel 5, which allows move a riser on the junction floor 8 between its position production 4 and the position at axis 6 of the derrick.
  • Ten production positions 4 have been represented but only one is equipped with a riser 2 equipped with a guiding device 9 secured to the joining floor 8.
  • FIG. 1 there are shown 10 locations 4 for risers of production 2, the rectangular compartments 3 are spaced apart from each other others of about 5 m and their end is located 5 m from the wall 10 vertical peripheral of the central cavity 1.
  • the length of said rectangular compartments 3 is about 6.5 m up to the axis of channel 5, and their width is about 1m to 1.5m.
  • said channel central 5 will have a substantially identical width, about 1m to 1.5m and its length will depend on the number of well heads, which represents about 30m in the case illustrated in Figure 1.
  • a riser 2 At the end of a compartment 3 is located a riser 2 in the position of production 4.
  • the riser 2 is equipped with a holding and guiding device 9 constituted by hinge means as shown in FIGS. 5, especially on the plane P0.
  • This device for holding and guiding 9 relative movements of the riser 2 with respect to the floating support allow vertical and lateral movements of the riser, since they include rotation means about an axis XX '/ YY' perpendicular to the axis longitudinal ZZ 'of the riser, and sliding means along the axis longitudinal ZZ 'of the riser.
  • the compartments are arranged perpendicular to the canal on one side of the canal and on the cob with a inclination of the order of 45 ° with respect to the axis XX 'of the channel on the other bank of the canal.
  • Figure 2 junction floor 8 further comprises, transfer means 12 of the riser 2 and a guide device 9, constituted by winches 12, connected by cables 12 to the two holding and guiding device 9 is moving by simple sliding on the joining floor 8 and being guided in the compartments and the channel 3 by rails 12 3 .
  • These two winches make it possible to move the riser-guiding device assembly 9 between the production position 4 and the axis of the central channel 5.
  • the rails 12 3 facilitate the passage of the device 9 to the right of the adjacent compartments from the starting position. , to the axis 16 of the derrick.
  • the winches 12 4 are then connected to a support 14 of the guiding device 9 by two cables 12 5 , and the cables 12 2 of the winches 12 1 are then disconnected.
  • the riser-guide assembly 9 is then transferred from the central position 5 to the axis 6 of the derrick.
  • FIG. 2 shows rails 12 3 which follow compartments 3 and channel 5 all along the path between the production positions 4 and the axis 6 of the derrick, so that the compartments 3 are crossed at the their intersection with the central channel 5 by said rails 12 3 , which can however be removable.
  • the guide rails 12 3 of the transfer means 12 along said compartments 3 and the channel 5 which must form a channel of substantially constant width, in the case where such rails 12 3 are provided, the compartments 3 and the channel 5 and the junction floor 8 may, in this case do not define a channel of substantially constant width.
  • the device for holding and guide 9 riser 2 rests on the junction floor 8. It can therefore transfer the riser 2 from its production position 4 to its position 6 in the derrick 7 by transferring a holding and guiding device 9 whose riser is equipped with solidarity.
  • the holding and guiding device 9 shown in FIGS. and 4 consists of a plurality of rollers 19 and pads 15 installed in alternating all around said riser, and comprises at least three wheels and three shoes arranged in a regular manner around said riser.
  • the set of casters is in contact with the riser 2.
  • the wheels 19 fade and skates then come into direct contact with the riser wall.
  • the transmission of efforts between riser and junction floor is then done so substantially symmetrical with respect to the plane XX '/ YY' whatever the value the angle 9 formed by the axis of the riser with the vertical.
  • the guiding device 9 is secured to the joining floor 8 by through a support 14 which can be detached from the floor when the device is transferred to another position.
  • the guiding device 9 can be transferred with the riser 2 to the axis of the derrick.
  • said guiding device 9 can just as easily be left in square. It is then opening, so as to release the riser 2 which is then supported by a second guiding device providing the same function, but with the difference that the transfer operation is short duration and preferably carried out in calm time, guidance device 9 can be greatly simplified.
  • the guiding device 9 comprises a washer-shaped support 14 which rests on the junction floor 8 by sliders 14 2 sliding on said floor 8 to transfer the riser inside the central channel 5 when the winches (not shown) 12 4 and cables 12 5 are implemented.
  • the riser When drilling the well, the riser is a riser specially designed for said drilling. It lies at the axis of the derrick and is maintained coaxially throughout the duration of the drilling operations that may last more than one month.
  • the drilling riser is disconnected from the wellhead and then moved laterally towards the garage position 17 while keeping, during the transfer, a guide 12 3 at the junction floor 8.
  • position 17 it is then kept in suspension by means not shown, such as cables connected to the structure of the derrick or it rests on a support, not shown, integral with the wall of the cavity.
  • the precaution is taken to reduce the length of the riser from 50 to 100 meters by dismounting one or two lengths elementary parts of the drill string.
  • the derrick has a second work area 18 located in the structure's right-of-way carrier of said derrick.
  • work location a location on the vertical side of which handling equipment is installed to perform intervention operations on the risers of production, such as maintenance operations of "Christmas tree" or maintenance of the well interior at different depths.
  • intervention operations such as maintenance operations of "Christmas tree" or maintenance of the well interior at different depths.
  • To the vertical of this location are therefore installed means of lifting and capacity handling in general less than the corresponding means installed at the axis of the derrick.
  • one installs means lifting capacity of up to 500 tonnes per hook, the latter before a vertical run of up to 50 meters, whereas at the axis of secondary work 18, a lifting capacity limited to example, 100 tons with a hook stroke limited to, for example, 12 meters vertically. It is thus possible to work on the drilling of a well in the axis 6 of the derrick and working in position 18 simultaneously to the maintenance of another well, simultaneously using the structure of the derrick to support the loads and handle the necessary tools.

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Claims (17)

  1. Schwimmender Träger vom Typ enthaltend einen Hohlraum (1), in dem eine Vielzahl von Risern (2) positioniert werden kann, dadurch gekennzeichnet, daß der Hohlraum (1) eine Vielzahl von Fächern (3) enthält, an deren Ende die Riser (2) in der Förderstellung (4) sind, wobei die genannten Fächer mit einem zentralen Kanal (5) in Verbindung stehen, an dessen Ende sich ein Bohrturm (7) befindet (6), wobei die genannten Fächer zu dem zentralen Kanal (5) quer angeordnet sind.
  2. Schwimmender Träger nach Anspruch 1, dadurch gekennzeichnet, daß er Mittel (12) zum Überführen der Riser (2) zwischen ihrer Förderstellung (4) am Ende der Fächer (3) und der Position (6) des Bohrturms (7) enthält.
  3. Schwimmender Träger nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Fächer (3) und der zentrale Kanal (5) einen Verbindungsboden (8) zwischen dem Riser und dem schwimmenden Träger an jedem Rand aufweisen, wobei der Verbindungsboden einen durchgehenden Kanal mit im Wesentlichen konstanter Breite definiert.
  4. Schwimmender Träger nach den Ansprüchen 2 und 3, dadurch gekennzeichnet, daß die Überführungsmittel ermöglichen, durch Zusammenwirken mit den Risem im Bereich des Verbindungsbodens einen sogenannten Riser entlang des Verbindungsbodens (8) zu verschieben.
  5. Schwimmender Träger nach Anspruch 2 und einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, daß die Überführungsmittel (12) mit einer Vorrichtung zum Halten und Führen (9) des Risers (2) zusammenwirken, wobei die Vorrichtung die Verbindung zwischen dem Riser und dem schwimmenden Träger sicherstellt.
  6. Schwimmender Träger nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß der Verbindungsboden (8) an der Wand (10) des Hohlraums (1) auf einer Zwischenhöhe zwischen der Brücke (11) des schwimmenden Trägers und dem Wasserspiegel (13) gelegen ist.
  7. Schwimmender Träger nach Anspruch 2 und einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß die Überführungsmittel (12) fest und mit dem schwimmenden Träger fest verbunden sind.
  8. Schwimmender Träger nach Anspruch 7, dadurch gekennzeichnet, daß die Überführungsmittel (12) eine Anordnung von Winden (121) und Kabeln (122), welche die Winden (121) mit dem Riser (2) verbinden, enthalten.
  9. Schwimmender Träger nach Anspruch 2 und einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß die Überführungsmittel (12) einen Schlitten aufweisen, der entlang der Fächer (3) und des zentralen Kanals (5) beweglich ist.
  10. Schwimmender Träger nach Anspruch 2 und einem der Ansprüche 3 bis 9, dadurch gekennzeichnet, daß der Verbindungsboden (8) mit Führungsschienen (123) ausgestattet ist, die ermöglichen, die Überführungsmittel oder den Riser entlang bzw. innerhalb der Fächer (3) und des zentralen Kanals (5) zu führen.
  11. Schwimmender Träger nach Anspruch 5 und einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß der Riser (2) oder die Vorrichtung (9) zum Führen des Risers mit einem Träger (14) ausgestattet ist, der dessen Verbinden mit dem Verbindungsboden (8) gewährleistet, wobei der Träger (14) Führungselemente (141) enthält, die ermöglichen, den Riser innerhalb der Fächer (3) und des zentralen Kanals (5) zu führen.
  12. Schwimmender Träger nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß er im Bereich der Achse (6) des Bohrturms (7) ein zu dem zentralen Kanal (5) querverlaufendes Fach aufweist, wobei das Fach einer Abstellposition (17) des Risers (2) entspricht.
  13. Schwimmender Träger nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß der Bohrturm einen zweiten Arbeitsort aufweist, der im Bereich der Struktur des Bohrturms gelegen ist.
  14. Schwimmender Träger nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß die Fächer eine rechteckige Längsform aufweisen und parallel zueinander, senkrecht oder ährenförmig zu einem geradlinigen, zentralen Kanal angeordnet sind.
  15. Schwimmender Träger nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß die Riser mit kanisterförmigen Schwimmern ausgestattet sind, die den Riser koaxial zu diesem im oberen Teil des Risers umgeben, wobei die Schwimmfähigkeit der Riser im Wesentlichen durch die Schwimmer, ohne Zusatz eines ergänzenden, an dem schwimmenden Träger angebrachten Spannsystems gewährleistet wird.
  16. Verfahren zum Überführen eines Risers an einem schwimmenden Träger von dessen Förderstellung (4) bis zu dessen Position (6) innerhalb eines Bohrturms, dadurch gekennzeichnet, daß der Riser (2) in dem Hohlraum (1) eines schwimmendes Trägers nach einem der Ansprüche 1 bis 15 verschoben wird.
  17. Verfahren nach Anspruch 16, dadurch gekennzeichnet, daß der genannte Riser (2) durch Verschieben der Vorrichtung zum Halten und Führen (9) des Risers gegenüber dem schwimmenden Träger nach Anspruch 5 und einem der Ansprüche 1 bis 4 und 6 bis 15, welche selbst mit dem Riser (2) fest verbunden ist, verschoben wird.
EP00956616A 1999-08-09 2000-08-03 Schwimmende träger mit einem zentralhohlraum, der aus einer vielzahl von fächern besteht Expired - Lifetime EP1204806B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9910418A FR2797465B1 (fr) 1999-08-09 1999-08-09 Support flottant comportant une cavitee centrale comprenant une pluralite de compartiments
FR9910418 1999-08-09
PCT/FR2000/002243 WO2001011183A1 (fr) 1999-08-09 2000-08-03 Support flottant comportant une cavite centrale comprenant une pluralite de compartiments

Publications (2)

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EP1204806A1 EP1204806A1 (de) 2002-05-15
EP1204806B1 true EP1204806B1 (de) 2005-03-09

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US (1) US6601531B1 (de)
EP (1) EP1204806B1 (de)
KR (1) KR20020021683A (de)
AT (1) ATE290645T1 (de)
AU (1) AU6850100A (de)
BR (1) BR0013087A (de)
DE (1) DE60018575D1 (de)
FR (1) FR2797465B1 (de)
NO (1) NO20020575L (de)
OA (1) OA12007A (de)
WO (1) WO2001011183A1 (de)

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Publication number Priority date Publication date Assignee Title
US20050045205A1 (en) * 2003-08-29 2005-03-03 Stach Steven R. Apparatus and method for cleaning printed circuit boards
US7967689B2 (en) * 2005-03-29 2011-06-28 Yigal Mesika Miniature spooling apparatus
NO334480B1 (no) * 2005-09-26 2014-03-17 Fred Olsen Energy Asa Anordning for lagring av rør samt anordning for håndtering av rør
WO2010030505A1 (en) * 2008-09-10 2010-03-18 Austin American Technology Corporation Cleaning and testing ionic cleanliness of electronic assemblies
US9010437B2 (en) * 2012-05-25 2015-04-21 The Technologies Alliance, Inc. Self-adjusting riser centralizer
KR101592912B1 (ko) * 2014-09-01 2016-02-12 대우조선해양 주식회사 텍사스 데크의 브릿지장치 및 이를 포함하는 잭업 리그선 그리고 이에 의한 파이프라인 시추정렬방법
US9976364B2 (en) * 2016-09-07 2018-05-22 Frontier Deepwater Appraisal Solutions LLC Floating oil and gas facility with a movable wellbay assembly

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US2999549A (en) * 1957-09-30 1961-09-12 Shell Oil Co Drilling
US3717002A (en) * 1971-03-08 1973-02-20 Brien B O Method and apparatus for constructing and connecting underwater risers
US3981369A (en) * 1974-01-18 1976-09-21 Dolphin International, Inc. Riser pipe stacking system
US3902553A (en) * 1974-02-08 1975-09-02 Allen A Jergins Offshore drilling at deep water locations
US4044895A (en) * 1976-06-04 1977-08-30 Barney Silis Adams, Jr. Pipe racking system
US4505614A (en) * 1982-10-15 1985-03-19 Armco Inc. Cam arm centralizer
NL8402734A (nl) * 1984-09-07 1986-04-01 Schelde Nv Inrichting voor het opslaan van pijpen.
US5486070A (en) * 1990-12-10 1996-01-23 Shell Oil Company Method for conducting offshore well operations
FR2747728B1 (fr) * 1996-04-18 1998-06-12 Etpm Sa Installation marine pour le forage et/ou l'exploitation d'un groupe de puits d'hydrocarbures
FR2754011B1 (fr) 1996-09-30 1999-03-05 Inst Francais Du Petrole Riser de production equipe d'un raidisseur approprie et d'un flotteur individuel

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OA12007A (fr) 2006-04-19
WO2001011183A1 (fr) 2001-02-15
ATE290645T1 (de) 2005-03-15
FR2797465A1 (fr) 2001-02-16
NO20020575D0 (no) 2002-02-05
EP1204806A1 (de) 2002-05-15
FR2797465B1 (fr) 2001-11-09
DE60018575D1 (de) 2005-04-14
KR20020021683A (ko) 2002-03-21
BR0013087A (pt) 2002-09-10
US6601531B1 (en) 2003-08-05
NO20020575L (no) 2002-02-05
AU6850100A (en) 2001-03-05

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