EP1204806A1 - Support flottant comportant une cavite centrale comprenant une pluralite de compartiments - Google Patents
Support flottant comportant une cavite centrale comprenant une pluralite de compartimentsInfo
- Publication number
- EP1204806A1 EP1204806A1 EP00956616A EP00956616A EP1204806A1 EP 1204806 A1 EP1204806 A1 EP 1204806A1 EP 00956616 A EP00956616 A EP 00956616A EP 00956616 A EP00956616 A EP 00956616A EP 1204806 A1 EP1204806 A1 EP 1204806A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- riser
- floating support
- compartments
- derrick
- support according
- 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
- 238000004519 manufacturing process Methods 0.000 claims abstract description 43
- 238000005553 drilling Methods 0.000 claims abstract description 39
- 238000012546 transfer Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 241000191291 Abies alba Species 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 3
- 101000701574 Homo sapiens Small regulatory polypeptide of amino acid response Proteins 0.000 description 2
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- 230000001133 acceleration Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019506 cigar Nutrition 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
- Floating support comprising a central cavity comprising a plurality of compartments
- the present invention generally relates to the field of bottom-surface connections of the type comprising a vertical submarine pipe, called a riser or riser, connecting the sea bottom to a floating support installed on the surface.
- the floating support structure is able to carry out all the drilling operations, putting into production and reconditioning of wells. It is also preferable that the floating support is capable of successively drilling several wells on the same site and then allowing the production and reconditioning operations of each of said wells.
- This floating support generally comprises anchoring means to remain in position despite the effects of currents, winds and swells. In general, it also includes means for storing and processing petroleum as well as means for unloading towards tanker removers. The latter appear at regular intervals to carry out the removal of production.
- the well heads are often distributed over the entire field and the production pipes, as well as the water injection lines and the control cables, are laid on the seabed in direction of a fixed location, vertically above which the floating support is positioned on the surface.
- Some wells are located vertical to the floating support and the interior of the well is then accessible directly from the surface.
- the well head fitted with its "Christmas tree” can be installed on the surface, on board the floating support. It is then possible to carry out, from a derrick installed on said floating support, all the drilling, production and maintenance operations of the well throughout the lifetime of said well. This is known as a dry wellhead.
- the dry well heads are gathered in a limited area of the platform, in which the derrick is movable to come to be positioned vertically over each of the wells to carry out drilling operations or operations well maintenance throughout the life of the field.
- the drilling derrick is a very high structure which can reach 60m and which has a lifting capacity which can exceed 500 tonnes, the means necessary to move it from one well to another and to keep it in position during operations on the wells lead to complex and expensive structures.
- the SPARs and TLPs are also equipped with a multiplicity of risers subtended by floats consisting of drums surrounding the riser coaxially and held in position by guidance systems.
- risers rise to the surface in a central cavity of the floating support called "ellbay" or drilling bay.
- the cavity crosses the hull vertically right through 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 it is the area where the amplitudes of movements and accelerations are lowest when the ship is subjected to the phenomena of roll, pitch and yaw.
- the floats concerned are large with in particular a diameter greater than 5m, and a length of 10 to 20m and have unitary buoyancies of up to 100 tonnes.
- the float and the pipe are subjected to the effects of the swell, of the current, but being connected to the FPSO on the surface, are also indirectly subjected to the effects of the wind. This results in significant lateral and vertical movements, up to several meters, of the riser-float-barge assembly, especially in the area prone to swell.
- risers are spaced from each other by several meters and also by several meters from the walls of the wellbay, which leads to wellbays which can reach 80 m in length and 20 m in width, on FPSO barges measuring up to 350 m in length, 80 m in width and having a height at the level of the plating which may reach and exceed 35 m.
- FPSO barges measuring up to 350 m in length, 80 m in width and having a height at the level of the plating which may reach and exceed 35 m.
- Such barges have a deadweight tonnage of up to and over 500,000 DWT.
- the present invention relates to the transfer of risers within the cavity, preferably central, from their production position up to a position where drilling operations as well as heavy well maintenance operations are carried out, that is to say - say from a fixed derrick relative to the floating support.
- drilling riser The drilling of the well is carried out at the main axis of the derrick, through a riser called “drilling riser", the function of which is to guide the drilling rods and to contain the mud in return of the well being drilled.
- This drilling riser is assembled from unit lengths up to 50m, the assembly being lowered step by step, as and when said riser is assembled.
- the part of the riser corresponding to the slice of water is disconnected from the well at sea level, then is directed towards a garage position after its length has been shortened by disassembly of one or more two unit lengths. By doing so, the drilling riser remains hanging, its lower end being located 50-100 m from 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 they are laid, then the base of the production riser is finally connected to the well.
- the well is then equipped with various production casings and the "Christmas tree" of the dry well head is put in place.
- the assembly is then transferred to its production position where it will remain for the entire life of the field, except for certain maintenance operations where it will be necessary to bring said riser to the main axis of the derrick to carry out heavy operations.
- These guidance systems generally include tensioning by cables which make the transfer of the riser from one position to another within the central cavity (wellbay) long and difficult to carry out, in particular as regards movement from the position of production up to the position in the axis of the derrick.
- a floating support comprising a rectangular or circular bay allowing the drilling and / or the deep-sea exploitation of a group of oil wells without it being necessary to move the drilling mast (derrick) relative to the bridge of the floating support structure to be able to operate on a well selected from the group of wells, and without the need to use an overhead crane to support and individually move a riser of a selected well from the group of wells, to be able to operate on the selected well.
- the risers are fixed at intervals from each other, to a movable table which can be moved relative to the bridge of the floating structure along a path and such that the respective upper ends of the risers can be brought successively in vertical alignment with the tower.
- the bay can have an elongated rectangular shape and the movable table is in this case rectangular, extending in the longitudinal direction of the rectangular bay and movable in translation in its longitudinal direction. A translation of the movable table along its longitudinal axis simultaneously displaces all the risers.
- the bay can also have a circular shape and the movable table also a circular shape with a diameter corresponding to that of the circular bay arranged concentrically thereto and rotatably mounted in the circular bay around the vertical axis of that -this. Again a rotation of the circular table around its axis simultaneously moves all the risers attached to it.
- a drawback of this system is that a displacement of the movable rectangular table or a rotation of the movable circular table causes a deflection of the assembly of the risers relative to the vertical. It follows that the tension or torsional forces on the risers then have a component which generates, by reaction on the floating structure, considerable forces between the floating support and said table and in the case of the circular table of the torque rotating said floating support structure about the axis of the circular table. The rotation of the circular table around its axis also subjects each riser to torsional forces.
- a platform is also described in which the risers are grouped in a rectangular area according to a matrix arrangement which, in plan view, has 4 rows and 6 columns.
- the tower which supports the apparatuses allowing the operations of drilling, production and reconditioning of the wells is mounted mobile on the deck of the platform by means of a slide system, so that the tower can be brought selectively into vertical alignment with the upper end of any of the risers.
- the tower Since the surface well heads located at the upper ends of the risers must be spaced from center to center by several meters, the tower must be moved over a relatively large rectangular area and its support structure connecting it to the floating support must span the two longitudinal rows of well heads, so that the axis of the derrick can be moved to the right of the axis of each of said well heads on which we wish to intervene.
- Such a support structure having to be able to move longitudinally and transversely relative to the axis of the floating support, will be of considerable size and complexity, and therefore of very high cost.
- 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 means of load balancing of the floating support, under the form for example of ballast.
- a platform comprising a plurality of risers arranged at the internal periphery of a rectangular opening.
- a mobile traveling crane above the bay is provided to support any riser and to bring the selected riser from its respective support at the periphery of the bay to the center of said bay in vertical alignment with a tower to allow drilling, production or reconditioning of the well corresponding to the selected riser.
- Such an overhead crane must include a tensioning system capable of keeping the riser in tension during the transfer from the production position to the position at the axis of the derrick, where drilling or reconditioning of wells will be carried out.
- the object of the present invention is to provide a new type of floating support in which transfers of the riser from one position to another within the cavity (wellbay) are simple to carry out and therefore can be carried out in complete safety.
- an object of the present invention is to provide a new type of floating support in which the transfer of the risers from a production position to a drilling position within the cavity can be carried out by individually moving the risers without requiring d expensive infrastructure like an overhead crane.
- the present invention provides a floating support which comprises a preferably central cavity comprising a plurality of compartments at the end of which said risers are in the production position, said compartments communicating with a central channel, at the end of which is located a drilling derrick, said compartments being arranged transversely to said central channel.
- said compartments have a substantially rectangular longitudinal shape and they are arranged parallel to each other.
- Each compartment therefore comprises a single riser at most, installed at the closed end of said compartment and which can be moved individually in the compartments and the central channel.
- the buoyancy of the risers is ensured essentially, or even exclusively, by floats without the addition of an additional tensioning system, in particular by cable using a winch or hydraulic jack installed on the floating support.
- an additional tensioning system in particular by cable using a winch or hydraulic jack installed on the floating support.
- said compartments have a rectilinear longitudinal shape and are arranged parallel to each other, perpendicularly or at an angle with respect to said rectilinear central channel. They are preferably spaced from each other regularly.
- said compartments and said central channel comprise a junction floor between said riser and said floating support on each bank, said junction floor defining a continuous channel of substantially constant width corresponding to a distance sufficient to install a riser between its two edges and to be able to move it using transfer means located on said junction floor.
- said junction floor is located at an intermediate level, in particular at mid-height, between the bridge of the floating support and the water level.
- the floating support according to the present invention comprises means for transferring said risers between their production position at the end of the compartments and the position of the derrick, said transfer means making it possible to move a said riser along said junction floor. by cooperating with said risers at 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 integral with said floating support.
- said transfer means comprise a set of winches and cables connecting said winches to said riser.
- said transfer means comprise a carriage movable along said compartments and said channel.
- said junction floor is equipped with guide rails which make it possible to guide said transfer means or said riser, in particular if said transfer means are fixed, along or respectively inside said compartments and said central channel , in particular at the intersection of said compartments and said central channel.
- the riser is equipped with a support which ensures its junction with the junction floor comprising guide elements, preferably arranged below said support and integral with the latter, making it possible to guide said riser to the inside said compartments and said central channel and, where appropriate, inside said guide rails.
- the riser is equipped with a holding and guiding device with respect to the floating support, it is the support ensuring the junction of the holding and guiding device with the junction floor which will include said guiding elements.
- the floating support according to the present invention may also include a compartment transverse to the central channel at the level of the axis of the derrick, said compartment corresponding to a garage position of the riser.
- said risers are equipped with canister-shaped floats surrounding the riser coaxially therewith, in the upper part of the riser, the buoyancy of the risers being ensured essentially by said floats without the addition of a tensioning system additional installed on the floating support.
- the present invention also relates to a method of transferring a riser from its production position to its position within a drilling derrick on a floating support, according to which said riser is moved in said cavity.
- floating support according to the invention, as will be explained in the detailed description.
- said riser is moved by moving said device for holding and guiding the riser relative to the floating support, itself integral with 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 current fatigue forces corresponding to loads of up to 10 tonnes, and occasional forces extremes corresponding to loads of up to 100 Tons, or even 200 Tons or more.
- the device for holding and guiding the riser relative to the floating support must be able to authorize movements substantially vertical longitudinal up to 5 meters or more.
- the riser must remain substantially coaxial with the axis of the derrick.
- this device for holding and guiding the riser relative to the floating support comprises articulation means integral with said floating support allowing: a) the rotation of said riser about a horizontal axis perpendicular to the longitudinal axis of said riser, in the limit of a cone with a half-angle at the apex less than or equal to 10 °, said horizontal axis and said apex of the cone being situated substantially in the center of the riser and at the level of the median plane of the zone where said means of articulation along the longitudinal axis, and b) said sliding of said riser along the longitudinal axis and said guide of the lateral displacements of said riser in a horizontal plane perpendicular to said longitudinal axis of the riser, and said articulation means comprise:
- friction pads having a bearing surface with said riser, said pads being mounted on a pad support allowing the pivoting of said pads around an axis perpendicular to said longitudinal axis of said riser, and preferably
- said pads cooperating with rollers, so that said rollers are supported on said riser, and allow it to slide, and said riser comes to bear on said pads only when said rollers move under the effect of the lateral displacements of said riser.
- longitudinal axis of the riser is meant the vertical axis when the riser is in the rest position, that is to say not subject to movements related to the agitation of the sea.
- This device for holding and guiding the riser relative to the floating support is designed to withstand variable forces in the horizontal plane.
- the rollers preferably guide the riser subjected to current loads of low loads of approximately 10 tonnes, and the pads provide guidance when the riser is subjected to heavy loads under extreme conditions of implementation, in particular up to 'to 100 Tons.
- This device for holding and guiding the riser relative to the floating support can be put in place on the floating support to maintain and guide undit laugh in its production position, or it can be connected to said means for transferring said riser from its production position towards the axis of a drilling derrick.
- said articulation means are preferably disposed at the level of the junction floor between said riser and said support, located in the wall of the cavity of the floating support between the bridge of the floating support and the level of the 'water.
- the holding and guiding device can also be placed in place on said floating support to maintain and guide a riser in operating position in a derrick installed on said floating support, more precisely at the axis of said derrick.
- Figure 1 is a top plan view of the central cavity 1 of the floating support with its central cavity, associated with a sectional view of the drilling derrick 7 at a level corresponding to the level + 10m relative to said junction floor 8 ,
- FIG. 2 is a plan view according to FIG. 1, further comprising the means 12 for transferring the riser from its production position 4 to the axis of the drilling derrick 6,
- Figure 3 is a side view of a riser equipped with a device for holding and guiding the riser relative to the floating support 9, comprising a plurality of rollers 19 and pads 15 installed alternately all around said riser 2 ,
- Figure 4 is a top view of a holding and guiding device 9 of the type of Figure 3, resting on the junction floor 8 on which is shown a compartment 3 forming a channel allowing the riser assembly -device holding and guiding to be moved towards the axis of the derrick;
- FIGS. 1 and 5 show a floating support of the type comprising a rectangular central cavity 1 with vertical peripheral walls s 10 within which a plurality of risers 2 can be positioned.
- the central cavity 1 rectangular has a horizontal junction floor 8 which ensures the junction between the risers and the floating support.
- This junction floor 8 is located approximately halfway between the water level 1 3 and the bridge 1 1 of the floating support ( Figure 5).
- An opening in the junction floor forms a continuous channel, the two edges of which are formed by said floor are spaced apart by a substantially constant distance.
- This continuous channel of substantially constant width is composed of a plurality of compartments 3 of longitudinal shape at the end of which said risers 2 are in production position 4 and of a central channel 5 of longitudinal shape, at the end of which a drilling derrick 7 is situated 6, said compartments being arranged transversely with respect to said central channel 5.
- the compartments 3 are rectangular, arranged parallel to one another and transversely with respect to the central channel 5, either perpendicularly or at an angle, that is to say with an inclination (therefore not perpendicular) relative to the longitudinal axis of the channel 5.
- the compartments 3 and the central channel 5 preferably have substantially the same width.
- FIG. 1 there is shown a view from above and in plan the junction floor 8 of said compartments 3 and central channel 5.
- the compartments 3 and the central channel 5 therefore form s channels of substantially constant width and having continuity between the said positions of the riser in the production position and the axis 6 of the derrick 7.
- These compartments 3 communicate with the central channel 5, which makes it possible to move a laugh on the junction floor 8 between its production position 4 and the position at axis 6 of the derrick.
- Ten production positions 4 have been shown, but only one is equipped with its riser 2 equipped with a guide device 9 secured to the junction floor 8.
- FIG. 1 0 locations 4 for production risers 2 are represented, the rectangular compartments 3 are spaced apart from each other by approximately 5 m and their end is located 5 m from the wall 1 0 vertical device of the central cavity 1.
- the length of said rectangular compartments 3 is approximately 6.5 m to the axis of the channel 5, and their width is approximately lm to 1.5m.
- said central channel 5 will have a substantially identical width, that is to say approximately lm to 1.5m and its length will depend on the number of well heads, which represents approximately 30m in the case illustrated in FIG. 1.
- a riser 2 At the end of a compartment 3 is located a riser 2 in the production position 4.
- the riser 2 is equipped with a holding and guiding device 9 consisting of articulation means as shown in Figures 3,4 and 5, notably in the PO plan.
- This device for holding and guiding the relative movements of the riser 2 relative to the floating support allows vertical and lateral movements of the riser, since they comprise means of rotation about an axis XX '/ YY' perpendicular to the longitudinal axis ZZ 'of the riser, and sliding means along the longitudinal axis ZZ' of the riser.
- the compartments are arranged perpendicular to the channel on one bank of the channel and on the cob with an inclination of the order of 45 ° relative to the axis XX 'of the channel on the other bank of the channel.
- the junction floor 8 further comprises transfer means 12 for the riser 2 and a guide device 9, made up of winches 12 ] connected by cables 12, to the holding and guide device 9 moving by simple sliding on the junction floor 8 and being guided in the compartments and the channel 3 by rails 12 3 .
- These two winches allow the riser-guide device 9 assembly to be moved 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 axis 16 of the derrick.
- the riser and its guide device 9 being in position in the central channel 5, the winches 12 4 are then connected to a support 14 of the guide device 9 by two cables 12 5 , and the cables 12, winches 12, are then disconnected.
- the riser-guide device 9 assembly is then transferred from the central position 5 to the axis 6 of the derrick.
- rails 12 3 are shown which follow the compartments 3 and the 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 level of their intersection with the central channel 5 by said rails 12 3 , which can however be removable.
- the holding and guiding device 9 of the riser 2 rests on the junction floor 8. It is therefore possible to 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 with which the riser is fitted integrally.
- FIG 3 there is shown an embodiment of the guide device 9, wherein the pads 1 5 and the rollers 19 cooperate as mentioned above.
- This guide device 9 authorizes: a) the movements of the riser parallel to its longitudinal axis ZZ ', and b) the angular movements along axes XX' and YY 'in a horizontal plane, limited to the cone of half-angle at the apex 8 , the half-angle of said cone being, according to the invention, less than 10 degrees; c) very limited lateral displacements in the plane of the axes XX 'and YY'.
- the holding and guiding device 9 shown in Figures 3 and 4 consists of a plurality of rollers 19 and pads 15 installed alternately around said riser, and comprises at least three casters and three pads arranged in a regular manner around said riser.
- rollers are in contact with the riser 2.
- the rollers 19 disappear and the pads then come into direct contact with the wall of the riser.
- the transmission of forces between riser and junction floor is then done so substantially symmetrical with respect to the plane XX '/ YY' whatever the value of the angle ⁇ formed by the axis of the riser with the vertical.
- FIG. 4 is a top view relating to a holding and guiding device 9 similar to that of FIG. 3 showing the guiding device 9 of the riser 2 in the position corresponding to the production position 4 and resting on the floor of j anointing 8.
- Said junction floor 8 forms a compartment forming a channel allowing the riser assembly 2- guide device 9 to be moved towards the axis 6 of the derrick 7.
- the guide device consists of:
- the guide device 9 is integral with the junction floor 8 via a support 14 which can be detached from the floor when the device is transferred to another position.
- the guide device 9 can be transferred with the riser 2 towards the axis of the derrick.
- said guide device 9 can just as easily be left in place. It is then opening, so as to be able to release the riser 2 which is then taken care of by a second guiding device ensuring the same function, with the difference however that the transfer operation being of short duration and being preferably carried out in in calm weather, said guide device 9 can be considerably simplified.
- the guide device 9 comprises a support 14 in the form of a washer which rests on the junction floor 8 by pads 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 used.
- Tubular guide elements 1 arranged below the support 14 and integral with the latter make it possible to guide the assembly inside the channel 5 formed by the edges of the junction floor 8.
- the riser When drilling the well, the riser is a riser specially designed for said drilling. It is located at the center of the derrick and is kept coaxially throughout the drilling operations which can last more than a month.
- the drilling riser is disconnected from the well head then it is moved laterally to the garage position 17 while keeping, during the transfer, a guide 12 3 at the junction floor 8. In position 17, it is then kept in suspension by means not shown, such as cables connected to the structure of the derrick or else it rests on a support, not shown, secured to the wall of the cavity.
- means not shown such as cables connected to the structure of the derrick or else it rests on a support, not shown, secured to the wall of the cavity.
- the derrick has a second working location 18 located in the grip of the supporting structure of said derrick.
- working location is understood here to mean a location vertically installed with handling means allowing intervention operations to be carried out on the production risers, such as maintenance operations for the "Christmas tree” or maintenance of the interior of the well at different depths. Vertical means of this location are therefore installed lifting and handling of capacity generally lower than the corresponding means installed at the axis of the derrick.
- lifting means capable of reaching loads of 500 tonnes on the hook, the latter having a vertical stroke of up to 50 meters, while on the secondary work axis 1 8, we install a lifting capacity limited to, for example, 100 tonnes with a hook stroke limited to, for example, 12 meters vertically. It is thus possible to work on drilling a well at axis 6 of the derrick and to work in position 1 8 simultaneously with the maintenance of another well, using simultaneously the structure of the derrick to support the loads and manipulate the necessary tools.
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- Engineering & Computer Science (AREA)
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Combustion & Propulsion (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Ocean & Marine Engineering (AREA)
- Civil Engineering (AREA)
- Earth Drilling (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
- Aerials With Secondary Devices (AREA)
- Casings For Electric Apparatus (AREA)
- Catching Or Destruction (AREA)
- External Artificial Organs (AREA)
- Invalid Beds And Related Equipment (AREA)
- Manipulator (AREA)
- Vibration Prevention Devices (AREA)
- Buffer Packaging (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Jib Cranes (AREA)
- Bridges Or Land Bridges (AREA)
Description
Claims
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)
Publication Number | Publication Date |
---|---|
EP1204806A1 true EP1204806A1 (fr) | 2002-05-15 |
EP1204806B1 EP1204806B1 (fr) | 2005-03-09 |
Family
ID=9549091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00956616A Expired - Lifetime EP1204806B1 (fr) | 1999-08-09 | 2000-08-03 | Support flottant comportant une cavite centrale comprenant une pluralite de compartiments |
Country Status (11)
Country | Link |
---|---|
US (1) | US6601531B1 (fr) |
EP (1) | EP1204806B1 (fr) |
KR (1) | KR20020021683A (fr) |
AT (1) | ATE290645T1 (fr) |
AU (1) | AU6850100A (fr) |
BR (1) | BR0013087A (fr) |
DE (1) | DE60018575D1 (fr) |
FR (1) | FR2797465B1 (fr) |
NO (1) | NO20020575L (fr) |
OA (1) | OA12007A (fr) |
WO (1) | WO2001011183A1 (fr) |
Families Citing this family (7)
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 (fr) * | 2008-09-10 | 2010-03-18 | Austin American Technology Corporation | Nettoyage et test de la propreté ionique d’ensembles électroniques |
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 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
1999
- 1999-08-09 FR FR9910418A patent/FR2797465B1/fr not_active Expired - Lifetime
-
2000
- 2000-08-03 EP EP00956616A patent/EP1204806B1/fr not_active Expired - Lifetime
- 2000-08-03 AU AU68501/00A patent/AU6850100A/en not_active Abandoned
- 2000-08-03 AT AT00956616T patent/ATE290645T1/de not_active IP Right Cessation
- 2000-08-03 WO PCT/FR2000/002243 patent/WO2001011183A1/fr active IP Right Grant
- 2000-08-03 DE DE60018575T patent/DE60018575D1/de not_active Expired - Lifetime
- 2000-08-03 BR BR0013087-7A patent/BR0013087A/pt active Search and Examination
- 2000-08-03 US US10/049,443 patent/US6601531B1/en not_active Expired - Fee Related
- 2000-08-03 KR KR1020027001778A patent/KR20020021683A/ko active IP Right Grant
- 2000-08-03 OA OA1200200047A patent/OA12007A/fr unknown
-
2002
- 2002-02-05 NO NO20020575A patent/NO20020575L/no not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO0111183A1 * |
Also Published As
Publication number | Publication date |
---|---|
OA12007A (fr) | 2006-04-19 |
WO2001011183A1 (fr) | 2001-02-15 |
EP1204806B1 (fr) | 2005-03-09 |
ATE290645T1 (de) | 2005-03-15 |
FR2797465A1 (fr) | 2001-02-16 |
NO20020575D0 (no) | 2002-02-05 |
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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