EP1501999B1 - Meeresboden/flächen-verbindungsinstallation für eine unterwasserrohrleitung, die durch mindestens ein durch eine basis gestütztes rohrkniestück mit einem steigrohr verbunden ist - Google Patents

Meeresboden/flächen-verbindungsinstallation für eine unterwasserrohrleitung, die durch mindestens ein durch eine basis gestütztes rohrkniestück mit einem steigrohr verbunden ist Download PDF

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Publication number
EP1501999B1
EP1501999B1 EP03749918A EP03749918A EP1501999B1 EP 1501999 B1 EP1501999 B1 EP 1501999B1 EP 03749918 A EP03749918 A EP 03749918A EP 03749918 A EP03749918 A EP 03749918A EP 1501999 B1 EP1501999 B1 EP 1501999B1
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EP
European Patent Office
Prior art keywords
pipe
sea bed
platform
resting
riser
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
Application number
EP03749918A
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English (en)
French (fr)
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EP1501999A1 (de
Inventor
Giovanni Chiesa
Floriano Casola
François-Régis PIONETTI
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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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/01—Risers
    • E21B17/015—Non-vertical risers, e.g. articulated or catenary-type
    • 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

Definitions

  • the present invention relates to a bottom-surface connection installation of at least one underwater pipe installed at great depth of the tour-hybrid type.
  • the technical field of the invention is the field of the manufacture and installation of production risers for the underwater extraction of oil, gas or other soluble or fuse material or a suspension of mineral material to from wellhead submerged for the development of production fields installed offshore at sea.
  • the main and immediate application of the invention being in the field of oil production.
  • a floating support generally comprises anchoring means to remain in position despite the effects of currents, winds and waves. It also generally comprises oil storage and processing means as well as means of unloading to removal tankers, the latter being present at regular intervals to carry out the removal of the production.
  • the name of these floating supports is the Anglo-Saxon term “Floating Production Storage Offloading” (meaning “floating means of storage, production and unloading") which will be used the abbreviated term "FPSO" throughout the description next.
  • the anchoring system comprises a vertical tendon consisting of either a cable or a metal bar, or a pipe stretched at its upper end by a float.
  • the lower end of the tendon is attached to a base resting at the bottom.
  • Said tendon comprises guide means distributed over its entire length through which pass said vertical risers.
  • Said base can be placed simply on the seabed and stay in place by its own weight, or remain anchored by means of batteries or any other device to keep it in place.
  • the lower end of the vertical riser is adapted to be connected to the end of a bent sleeve, movable, between a high position and a low position, with respect to said base, to which this cuff is suspended and associated with a return means bringing it up in the absence of the riser.
  • This mobility of the bent sleeve makes it possible to absorb the length variations of the riser under the effects of temperature and pressure.
  • a stop device integral with it, comes to rest on the installed support guide at the head of the float and thus keeps the entire riser in suspension.
  • connection with the submarine pipe resting on the seabed is generally effected by a pig-shaped or S-shaped pipe portion, said S being then made in a vertical or horizontal plane, the connection with said underwater pipe being generally carried out via an automatic connector.
  • thermal insulation systems which make it possible to reach the required level of performance and to withstand the pressure of the seabed which is of the order of 150 bar at 1500m depth.
  • Examples include "pipe-in-pipe” concepts, including a pipe carrying the hot fluid installed in an external protective pipe, the space between the two pipes being either simply filled with a heat insulation, confined or not under vacuum, or simply drawn to vacuum.
  • Many other materials have been developed to insure high performance insulation, some of them being pressure resistant, simply surround the hot pipe and are usually confined within a flexible or rigid outer casing, in equipressure and whose main function is to maintain in time a substantially constant geometry.
  • All these devices carrying a hot fluid in an insulated pipe have, to varying degrees, differential expansion phenomena.
  • the inner pipe usually steel
  • the outer shell often also steel
  • the outer shell is at seawater temperature, ie around 4 ° C.
  • the forces generated on the connecting elements between the inner pipe and the outer casing are considerable and can reach several tens or even hundreds of tons and the resulting overall elongation is of the order of 1 to 2 m in the case of insulated pipework. 1000 to 1200m in length.
  • the problem posed according to the present invention is to be able to make and install such bottom-surface connections for submarine pipes at great depths, such as beyond 1000 meters for example, and of type comprising a vertical tower and whose transported fluid must be kept above a minimum temperature until it reaches the surface, minimizing components subject to heat loss, avoiding the disadvantages created by the clean thermal expansion, or differential, of the various components of said tower, so as to withstand the extreme stresses and cumulative fatigue phenomena over the life of the structure, which currently exceeds 20 years.
  • Another problem of the present invention is to provide a bottom-surface connection facility of the tour-hybrid type whose anchoring system is of high strength and low cost, and whose method of setting up different constituent elements are simplified and also low cost.
  • Another problem underlying the invention is to provide an installation that allows to intervene inside the underwater pipe resting at the bottom of the sea, by a process of "coil-tubing" type from the surface and from the upper end of the vertical riser.
  • connecting elements can move only in a single degree of freedom in linear translation, can thus absorb the possible movements of expansion and retraction of the pipe resting at the bottom of the sea in said direction, as will be explained more far.
  • the substantially fixed point at altitude is at the bottom of the tower at the level of the flexible joint, which makes it possible to eliminate the angled connecting sleeves of the prior art, the vertical movements of the riser being absorbed by the float, free to move vertically at the top of said riser.
  • elbow-shaped conduit ensuring the junction between said vertical riser and said pipe lying horizontally at the bottom of the sea, it is understood that said elbow-shaped pipe portion is arranged so that its said axial plane is in position vertical.
  • vertical riser is used here to account for the theoretical position of the riser when the riser is at rest, provided that the riser axis can know angular movements with respect to the vertical and move in a cone.
  • angle ⁇ whose vertex corresponds to the point of attachment of the lower end of the riser on said base.
  • the term "vertical axial plane” means that this axial plane is in a position perpendicular to the plane of the seabed on which the said base rests, which plane is theoretically a horizontal plane, and said axial plane comprises the axis of the rectilinear end portion of the pipe resting at the bottom of the sea.
  • connection elements in particular of the automatic connector type, are known to those skilled in the art and comprise the locking between a male part and a complementary female part, this locking being designed to be done very simply at the bottom of the sea. using a ROV, robot controlled from the surface, without requiring direct manual intervention of personnel.
  • controlled displacement means a displacement whose amplitude is limited by mechanical stops integral with the platform.
  • the platform comprises a structure constituting guiding elements such as barrier or slide which prevent any further displacement of the mobile support in a lateral direction XX 'or in height, ie in a vertical direction ZZ'.
  • the installation according to the present invention is advantageous because it has a relatively static geometry of said connecting elements with respect to said base, and more particularly with respect to said movable support, said connecting elements being held rigidly on said movable support.
  • the lower part of the tower is thus perfectly stabilized and no longer supports any effort, especially at the connection between the vertical riser and the pipe resting at the bottom of the sea, since the longitudinal translation movements of the mobile support creates flexibility to the end of the submarine pipe resting at the bottom of the sea, said flexibility being able to absorb by deformation the elongation or retraction of the underwater pipe under the effect of temperature and pressure, avoiding thus to create considerable pushing forces within the underwater pipe, these efforts being able to reach 100, even 200 tons or more, and to transmit them to the foundation structure of the riser tower.
  • said vertical riser comprises in its lower end portion a flexible seal, preferably reinforced, which allows angular movements ⁇ of the portion of said vertical riser located above said flexible seal, and said joining elements comprise said flexible seal or vertical riser portion below said flexible seal.
  • a flexible seal allows a large variation of the angle ⁇ between the axis of the riser and its theoretical vertical position at rest, without creating significant stress in the pipe portions located on either side of said flexible seal: these flexible joints are known to those skilled in the art and may be constituted by a spherical ball joint with seal, or a laminated ball joint consisting of sandwiches of elastomer sheets and adhered sheet metal, capable of absorbing significant angular movements by deformation of the elastomers, while maintaining a perfect seal due to the absence of friction seal. Said angle ⁇ is in general between 10 and 15 degrees.
  • said flexible seal is hollow to let the fluid, and its inner diameter is preferably of substantially the same diameter as the adjacent pipes connected thereto, in particular that of the vertical riser.
  • reinforced flexible joint here means a seal capable of transferring to the mobile support the vertical forces created by the tension generated by the sub-surface float, and the horizontal forces created by the swell, and the current acting on the portion vertical riser, float and the flexible connection to the floating support, as well as by the movements of said floating support.
  • said connecting elements comprise said flexible seal
  • said flexible seal is thus fixedly fixed relative to said movable support.
  • said flexible seal then corresponds to an end element of the connecting elements ensuring the junction with said vertical riser.
  • Another advantage of the present invention is also the considerable reduction in the overall cost, resulting from the suppression of the cuffs used in the prior art to connect the vertical riser and the underwater pipe resting on the seabed.
  • the installation according to the invention makes it possible to eliminate all these drawbacks of the prior art and to provide at the best cost, a riser tower integrating the most efficient insulation technologies.
  • said rigid elbow-shaped pipe element has at its free end a first part, male or female of a connecting element, and the second complementary female or male part respectively of said connecting element is located either at the end of the rectilinear terminal pipe element of said pipe resting at the bottom of the sea, or at the end of said vertical riser, more particularly just below said flexible seal.
  • said movable support comprises a central cavity open on the top by an upper orifice adapted to receive said rigid pipe element having a bend-shaped elbow when it descended from the surface within said support mobile.
  • This embodiment described above makes it easier to set up the installation and the connection of the vertical riser and underwater pipe resting on the ground during the installation of the installation.
  • said upper orifice cooperates with locking elements, preferably a wedge system, for locking said reinforced flexible joint which is thus rigidly and securely fixed to said movable support, and the horizontal end portion of said pipe lying at the bottom of the sea is held fixedly on the bottom of said movable support, preferably by means of a collar system.
  • locking elements preferably a wedge system
  • junctions between the various components of the float assembly, flexible pipe and vertical riser being located not far from the surface are subject to the combined effects of the swell and the current.
  • surface support being subjected not only to the swell and the current, but also to the effects of the wind, the overall movements create at the singular point that constitutes the junction between riser and flexible pipe, considerable efforts in the various mechanical constituents.
  • Another problem according to the present invention is to allow easy intervention within said riser from the surface, in particular to allow inspection or cleaning of said vertical riser, by introducing a rigid tube from the upper end of the float. passing through said connection device between float and vertical riser.
  • the multiphase mixture consisting of crude oil, water and gas, tends, when the temperature drops below a value between 30 and 40 ° C, to create two types of plugs that may block production.
  • a first type of plug is due to the formation of hydrates from the gaseous phase in the presence of water, another type is due to the freezing of paraffin contained in variable proportion in the crude oil of certain oil fields, particularly in West Africa.
  • the method of intervention inside the pipes consists of pushing a rigid tube of small diameter, generally 20 to 50 mm, through the pipe.
  • Said rigid tube is stored wound by simple bending on a drum, then unstripped when uncoiling it.
  • Said tube can measure several thousand meters in a single length.
  • the end of the tube at the barrel of the storage drum is connected via a rotary joint to a pumping device capable of injecting a high pressure liquid. and at high temperature.
  • Another advantage of the installation according to the invention is that all the elements can be prefabricated on the ground before being installed. They can thus be mounted "blank" to verify that all the elements cooperate properly, including the locking means; thus, the assembly of the installation is considerably simplified and the operational time of the installation vessels is reduced to a minimum.
  • the subsea pipes were laid and then, after installation of the risers, angled connecting sleeves were manufactured on the basis of a metrology of high accuracy achieved through the ROVs.
  • the sleeve, prefabricated onshore or on site can measure several tens of meters and must then be installed by the same ROV, which represents a considerable operational time, so a very high cost due to the sophistication of specialized installation vessels.
  • the gain achieved by the device and the method according to the invention is in several days of installation vessel and the removal of automatic connectors indispensable to each end of the prefabricated sleeve, which represents a reduction in cost considerable.
  • the mobile support is assembled on the surface within the platform, then the assembly is then lowered and set up on the seabed.
  • the FPSO 1 is anchored on a petroleum field by 1500 m of water height, by a not shown anchoring system and comprises at its plating a support system 2 1 of flexible pipes 3 of petroleum effluents chain configuration back to a gooseneck device 4 1 , itself integral with the upper end of a vertical riser 5.
  • the assembly is maintained in tension by said float 6 installed at the head of the riser vertical 5 via a flexible pipe 7.
  • Said float 6 is traversed by a pipe 8 in continuity with said hose 7 to lead to an orifice closed by a valve 9.
  • An intervention vessel 2 located vertically of said float can perform a maintenance operation by coil-tubing through the float 6, so as to push in the vertical part of the pipe, a rigid pipe, not shown, small diameter, generally 50mm, for cleaning the interior of the pipeline as it progresses.
  • Coil-tubing devices being known to those skilled in the art of oil well interventions will not be further developed here.
  • FIGS. 2 to 4, and 6 to 12 show the lower part of an installation according to the invention in which the connection between the lower end of said vertical riser 5 and said underwater pipe 10 resting at the bottom of the sea is via an anchoring system comprising a base 4 placed on the bottom.
  • the platform 15 comprises a structure constituting guiding elements 16 1 such as barrier or slide which prevent any further displacement of the mobile support in a lateral direction XX 'or in height, ie in a vertical direction ZZ'.
  • guiding elements 16 1 such as barrier or slide which prevent any further displacement of the mobile support in a lateral direction XX 'or in height, ie in a vertical direction ZZ'.
  • Said base 4 ensures the rigid retention and guiding of the connecting elements 11-13 between the lower end of said vertical riser 5 and the end of the straight horizontal end portion of said pipe resting at the bottom of the sea 10, and said elements 11-13 include a pipe member having a bend-shaped bend 11 and a pipe connection member 12, preferably a single connecting member, more preferably, a single automatic connector, holding and guiding said joining elements 11-13 being such that said joining elements 11-13 can move only in a translation movement in a single longitudinal direction YY 'corresponding to the axial direction of said part horizontal rectilinear terminal of said underwater pipe resting at the bottom of the sea 10.
  • FIGS 2 and 9 show sections in front view of an installation according to the invention after implementation of all the connecting elements and pipes to be connected.
  • Figures 4 and 10 show side views of an installation according to the invention, after establishment of the connecting elements and pipes to be connected.
  • FIGS. 5 to 8, as well as 11 and 12, represent views of various elements constituting the installation according to the invention during the different phases of the placing procedure.
  • FIG. 5 there is shown the platform 15 surmounted by lateral guiding barriers 16 1 which provide guiding in sliding in longitudinal translation in the direction YY 'of the movable support element whose lower part is maintained between said guiding barriers 16 1 .
  • FIGS. 10 and 11 there is shown an abutment element 16 3 which makes it possible to control the sliding in translation and prevents excessive sliding of the mobile support 14 inside the guide barriers 16 1 over the platform 15
  • This sliding in translation in the direction YY ' is made possible by means of sliding shoes 14 1 , arranged below said mobile support 14, on its sides and on the top. It is also possible to use rollers or any other device intended to reduce friction during longitudinal displacements in the direction YY '.
  • FIG. 6 shows the mobile support 14 lowered from the surface by means of cables that are not shown, inserted between the elevational structures constituting the guiding barriers 16 1 disposed over the guiding platform 15.
  • mobile support 14 can move along a longitudinal axis YY 'thanks to the sliding pads 14 1 but can not move laterally along the axis XX' or upwards along the axis ZZ '.
  • the upper portion of the guide barriers 16 1 cooperates with movable locking elements consisting of a wedge system 16 2 , which can be engaged so that the outer shape of the lower part of the movable support at the level of a shoulder 14 4 on which slide pads 14 1 abut abut against said engaged corners 16 2 preventing the elevation of the movable support 14.
  • FIGS. 2, 10 and 11 show that the guiding barriers 16 1 disposed above the platform 15 are spaced so as to provide a sufficient clearance, for example 1 cm, on either side of the movable support when it is placed on the platform between said guide barriers 16 1 to avoid possible jamming when traveling according to the YY 'axis of the mobile support 14 over the platform 15.
  • the platform 15 is held in position on the bottom of the sea 20 either by its own weight, or by addition of dead bodies 15 2 or by means of suction anchors 15 3 dark across the platform or by a combination of these methods. Spades 15 1 are advantageously provided on the underside of the platform 15 to prevent slippage or horizontal displacement of the platform regardless of the direction.
  • the platform 15 may have a length of 10 to 12 m and a width of 6 m, capable of receiving dead bodies 15 2 of 25 to 50 tons.
  • the mobile support 14 may have a mass of 40 tonnes corresponding to the voltage minimum required at the foot of riser, that is to say at the flexible joint 13. Said mobile support 14 may be about 1.5 m wide and 4 m long.
  • the mobile support 14 is positioned substantially in the middle of the platform, which allows a relative movement ⁇ of plus or minus 3 m, along the axis XX ', displacement generated by the expansion or the thermal shrinkage, as well as the underwater pipe 10, as well as the internal pressure of the subsea pipe 10 resting on the bottom.
  • FIGS. 4 and 6 to 12 show a movable support 14 having a central cavity 18 whose upper part comprises a peripheral inner wall which is flared in the form of a funnel, said cavity 18 being open in its upper part by a orifice 18 1 corresponding to said large base of the funnel-shaped upper part of the cavity 18.
  • a cradle-shaped base 14 3 makes it possible to receive and support the rigid pipe element having a bend-shaped bend 11 which is disposed within said movable support 14 as shown in Figures 2 and 9.
  • the movable support has an internal cavity also open at its base, so that it is possible to set up the underwater pipe by temporarily installing it on the platform 15, then lowering the support mobile over the underwater pipe to the extent that the central cavity of the movable support allows the passage of the bent element 11 and the automatic connector 12, and finally, the underwater pipe is secured with the movable support whose pedestal 14 3 and said locking means 19-19 1 are located on the wall of the internal cavity of the mobile support located above said pipe initially installed on the platform 15.
  • the submarine pipe 10 resting at the bottom of the sea ends with a rigid pipe element having a curvature in the shape of a bend 11, ending at its upper part facing upwards by a first part 12 1 of a connecting element 12, namely here, a male part.
  • the horizontal straight end portion of the submarine pipe resting on the bottom of the sea 10 located before said elbow-shaped pipe element 11, is supported by the cradle base 14 3 on the bottom of said mobile support 14, and is locked by a device 19 ensures the locking of a ferrule 19 1 welded to the outside of the underwater pipe 10.
  • the flexible seal 13 is reinforced by an external reinforcing structure which ensures its embedding in the orifice upper 18 1 of the cavity 18 of the movable support 14 to ensure the rigidity of the assembly when a frustoconical corner system 17 comes to lock in final position in the cavity 18 at the upper orifice 18 1 of the movable support 14, as illustrated in the figures.
  • the flexible seal may be of the mechanical ball joint type or elastomeric flexible seal, or may correspond to a limited length of flexible pipe capable of providing the same angular displacement relative to the vertical riser 5, especially in a corner cone ⁇ up to 15 degrees.
  • the pipe element having a curvature in the shape of a bend 11 has a curvature comprising a circular arc with a large radius of curvature, in particular a radius of curvature greater than 5 m, more particularly of the order of 5 to 10 m achieved by a curved pipe element measuring 7 to 15 m.
  • Corners 17 shown in FIGS. 6 to 8 in the disengaged position with respect to said wall of the upper orifice 18 1 are actuated by an ROV by means of hydraulic cylinders (not shown), which then engage inside the housing.
  • the frusto-conical corners 17 abut in pressing the reinforcing structure said reinforced flexible joint 13 and hold it in fixed position relative to the mobile support 14.
  • Complementary latches 14 2 are then actuated by a device not shown thus making it possible to transfer to the mobile support 14 4 the entirety of the vertical load created by the riser 5 maintained in tension by the upper float 6 of FIG.
  • Figure 3 is a sectional plan view of the upper orifice 18 1 showing three frustoconical corners 17, one of which is shown in the retracted position upwards, and the other two in the jamming position engaged downwardly to the inside the hole 18 1 .
  • FIGS. 2 to 11 The installation according to the invention has been described in FIGS. 2 to 11 with a reinforced flexible seal 13 situated above a portion 12 2 of automatic connector 12.
  • said rigid pipe member having a bend-shaped bend 11 is pre-installed on the underside of said reinforced flexible joint 13, said bend-shaped conductor 11 having its free lower end, a first portion 12 2 connecting element of the automatic connector type 12.
  • said first connecting element part 12 2 has its axis arranged horizontally slightly above the bottom of the cavity 18 of the mobile support 14, once the flexible seal 13 is locked in place in the upper opening 18 1 of the mobile support 14 by means of the corners 17.
  • the connection is then made with the underwater pipe resting at the bottom of the sea 10 whose horizontal rectilinear end portion rests on a carriage 21 sliding on the platform 15 to using sliding pads 22, said rectilinear horizontal end portion of the submarine pipe resting at the bottom of the sea 10 being held by cradles 14 3 on the bottom of said mobile carriage 21 and secured to said carriage 21 by a collar lock 19-19 1 .
  • the connection is made by displacement, in said longitudinal direction YY ', of said mobile carriage 21 between said sliding barriers 16 1 on the platform 15. Finally, the carriage 21 is secured to the mobile support 14 by means not shown.
  • Said second flexible pipe 7 has at its ends progressive elements of inertial variation of section 7 1 , 7 2 respectively at the underside of the float 6 and the upper end of the gooseneck.
  • the gooseneck-shaped device comprises an upper straight portion which provides the junction between said vertical riser and said second flexible pipe connected to said float.
  • a bend shaped curve allows the junction between the end of said vertical riser and the end of said flexible pipe itself connected to said floating support.
  • the ends of said curve being substantially tangent with the curve of the chain constituted by said flexible pipe which provides the connection to the floating support, and substantially tangent with said straight part of the gooseneck device.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Supports For Pipes And Cables (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Piles And Underground Anchors (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Claims (13)

  1. Boden/Flächen-Verbindungsinstallation für eine auf dem Meeresboden, insbesondere in großer Tiefe, aufliegende Unterwasserrohrleitung (10), umfassend:
    a) mindestens ein vertikales Steigrohr (5), das an seinem unteren Ende mit mindestens einer auf dem Meeresboden aufliegenden Unterwasserrohrleitung (10) und an seinem oberen Ende mit mindestens einem Schwimmer (6) verbunden ist,, und
    b) mindestens eine Verbindungsrohrleitung (3), vorzugsweise eine biegsame Rohrleitung, die für die Verbindung zwischen einem Schwimmträger (1) und dem oberen Ende (4) des vertikalen Steigrohrs (5) sorgt, und
    c) wobei die Verbindung zwischen dem unteren Ende des vertikalen Steigrohrs (5) und einer auf dem Meeresboden aufliegenden Unterwasserrohrleitung (10) anhand eines Ankersystems mit einer Basis (4), die auf dem Boden liegt, erfolgt,
    wobei bei der Installation die Basis (4) für den Halt und die Führung der Verbindungselemente (11-13) zwischen dem unteren Ende des vertikalen Steigrohrs (5) und dem Ende des horizontalen geradlinigen Endteils der Rohrleitung auf dem Meeresboden (10) sorgt,
    dadurch gekennzeichnet, daß:
    - die Verbindungselemente (11-13) ein starres Rohrleitungselement mit einer knieförmigen Krümmung (11) und ein Rohrleitungs-Anschlußelement (12), vorzugsweise ein einziges Anschlußelement, wiederum vorzugsweise, ein einziger automatischer Verbinder, umfassen und auf einem mobilen Träger (14) der Basis (4) befestigt sind, der fähig ist, sich vorzugsweise auf gesteuerte Weise auf einer Plattform (15) der Basis (4) auf dem Meeresboden zu verschieben, und
    - der Halt und die Führung der Verbindungselemente (11-13) derart ausgebildet ist, daß sich die Verbindungselemente (11-13), die auf dem mobilen Träger (14) befestigt sind, nur in einer Translationsbewegung in einer einzigen Längsrichtung YY' verschieben können, die etwa der Achsrichtung des geradlinigen horizontalen Endteils der Unterwasserrohrleitung auf dem Meeresboden (10) entspricht.
  2. Installation nach Anspruch 1, dadurch gekennzeichnet, daß das vertikale Steigrohr (5) an seinem unteren Endteil eine bewegliche Kupplung (13), vorzugsweise verstärkt, umfaßt, die Schwenkbewegungen (α) des Teils des vertikalen Steigrohrs (5) erlaubt, das sich über der beweglichen Kupplung (13) befindet, und daß die Verbindungselemente (11-13) die bewegliche Kupplung (13) oder einen Abschnitt des vertikalen Steigrohrs, der sich über der beweglichen Kupplung (13) befindet, umfassen.
  3. Installation nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß:
    - ein erster Teil (121), vorzugsweise ein Vaterteil, eines Anschlußelements (12) fest an der beweglichen Kupplung (13) verbunden ist, und direkt unter ihr angeordnet ist, und daß
    - die Unterwasserrohrleitung auf dem Meeresboden (10) durch ein starres Rohrleitungselement mit einer knieförmigen Krümmung (11) endet, das an seinem Ende ein zweiter Teil (122), vorzugsweise ein Mutterteil, eines Anschlußelements (12) aufweist, das fähig ist, mit dem ersten Teil zusammenzuwirken, um das Anschlußelement (12) zu bilden.
  4. Installation nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß:
    - das starre Rohrleitungselement, das eine knieförmigen Krümmung (11) aufweist, direkt an der Unterseite der beweglichen Kupplung (13) befestigt ist und an seinem anderen Ende einen ersten Teil (121) umfaßt, vorzugsweise ein Mutterteil, eines Anschlußelements (12), und daß
    - der erste Teil (121) des Anschlußelements, vorzugsweise ein Mutterteil, zusammen mit einem zweiten Teil (122) des Anschlußelements, vorzugsweise ein Vaterteil, am Ende eines horizontalen Endteils einer Unterwasserrohrleitung auf dem Meeresboden (10) wirkt, um ein Anschlußelement (12) zu bilden.
  5. Installation nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der mobile Träger (14) einen zentralen Hohlraum (18) umfaßt, der auf der Oberseite durch eine obere Öffnung (181) offen ist, die fähig ist, das starre Rohrleitungselement mit einer knieförmigen Krümmung (11) aufzunehmen, wenn dieses von der Fläche im mobilen Träger (14) aus herabgelassen ist.
  6. Installation nach Anspruch 5, dadurch gekennzeichnet, daß die obere Öffnung (181) zusammen mit Klemmelementen, vorzugsweise ein Keilsystem (17), wirkt, wodurch die verstärkte bewegliche Kupplung (13) blockiert werden kann, die somit starr und fest am mobilen Träger (14) verbunden gehalten wird, und daß der horizontale Endteil der Rohrleitung auf dem Meeresboden (10) fest auf dem Boden des mobilen Trägers gehalten wird, vorzugsweise mit Hilfe eines Schellensystems (19-191).
  7. Installation nach Anspruch 6, dadurch gekennzeichnet, daß die obere Öffnung (181) eine periphere Innenwand in Form eines Trichter mit einer großen Oberbasis aufweist, und daß die Keile (17), mit der die verstärkte bewegliche Kupplung (13) blockiert werden kann, aus kegelstumpfförmigen Keilen (17) bestehen.
  8. Installation nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Plattform derart Führungs- und Halteelemente (161-163) des mobilen Trägers (14) aufweist, daß sich der mobile Träger (14) auf der Plattform (15) nur durch Translationsverschiebung in eine Längsrichtung YY' bewegen kann, vorzugsweise mit Hilfe von Gleitstücken (141).
  9. Installation nach Anspruch 8, dadurch gekennzeichnet, daß der mobile Träger (14) seitlich zwischen zwei seitliche Führungsbarrieren (161) der Plattform gehalten wird, und daß die seitlichen Führungsbarrieren (161) mit mobilen Klemmelementen (162) zusammen wirken, die in eingezogener Freiposition das Herablassen des mobilen Trägers (14) von der Fläche aus bis zu einer Position zwischen den beiden seitlichen Barrieren (161) von der Oberseite der Plattform (15) aus erlauben, und in vorgeschobener Klemmposition derart zusammen mit der Außenform (144) des mobilen Trägers (14) wirken, daß die vertikale Verschiebung ZZ' in dessen Höhe gesteuert ist.
  10. Installation nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Basis (4) eine Plattform (15) auf dem Meeresboden umfaßt, die zusammen mit Stabilisierungselementen wirkt, die Festmachetonnen (152) umfassen, die auf die Plattform (15) gelegt sind, oder Sauganker (153), die durch die Plattform gehen, um in den Boden eingesenkt zu werden, und/oder Aufbauelemente des Sporntyps (151), die an der Unterseite der Plattform angeordnet sind und im Meeresboden eingesenkt sind, um jedwedes Gleiten der Plattform auf dem Meeresboden zu verhindern.
  11. Verfahren zur Einrichtung einer Installation nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß es die Schritte umfaßt, in denen:
    1. man auf dem Meeresboden (20) eine Basis (4) einrichtet, und
    2. man auf den Meeresboden eine Unterwasserrohrleitung auf dem Meeresboden (10) herabläßt, wobei sie an ihrem Ende mindestens einen Teil der Verbindungselemente (11-13) aufweist, die an ihrem Ende einen ersten Teil (121) vom Anschlußelement umfassen, und
    3. man den horizontalen geradlinigen Endteil der Rohrleitung auf dem Meeresboden (10) fest mit der Basis verbindet, und
    4. man das vertikale Steigrohr herabläßt, das an seinem Ende mindestens den anderen Teil der Verbindungselemente (11-13) aufweist, die an ihrem unteren Ende mindestens einen zweiten Teil (122) vom Anschlußelement umfassen, und
    5. man den Anschluß des ersten Teils (121) und des zweiten Teils (122) realisiert, um das Anschlußelement (12) zu bilden, und
    6. man die Verbindungselemente (13) auf der Basis (4) blockiert.
  12. Verfahren nach Anspruch 11, in dem die Basis eine Plattform (15) und mindestens einen mobilen Träger (14) umfaßt und in dem man die Schritte realisiert, in denen:
    1. man auf dem Meeresboden (20) die Plattform (15) und den mobilen Träger (14) auf der Plattform (15) einrichtet und man die Riegel (162) betätigt, um die Höhenverschiebung des mobilen Trägers gegenüber der Plattform zu steuern und zu verhindern, wobei man die gesteuerte Translationsbewegung des mobilen Trägers in der Längsrichtung YY' frei läßt, und
    2. man auf dem Meeresboden (20) eine Unterwasserrohrleitung (10) herabläßt und einrichtet, die an ihrem Ende mit mindestens einem Teil der Verbindungselemente (11-13) ausgerüstet ist, die an ihrem Ende mindestens einen ersten Teil (121) vom Anschlußelement umfassen, und
    3. man auf dem Boden (143) des mobilen Trägers (14), den geradlinigen horizontalen Endteil der Rohrleitung auf dem Meeresboden (10) fest verbindet, und
    4. man ein vertikales Steigrohr (5) herabläßt, das an seinem unteren Ende mit mindestens dem anderen Teil der Verbindungselemente (11-13) ausgerüstet ist, die an ihrem Ende einen zusätzlichen zweiten Teil (122) mit Anschlußelementen (12) umfassen, und
    5. man den ersten Teil (121) und den zweiten Teil (122) Anschlußelementen (12) nähert und man den Anschluß realisiert, und
    6. man das Blockieren der Verbindungselemente (11-13) auf dem mobilen Träger realisiert.
  13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß:
    a) die Unterwasserrohrleitung auf dem Meeresboden (10) an ihrem Ende mit einem starren Rohrleitungselement ausgerüstet ist, das eine knieförmige Krümmung (11) aufweist, wobei das knieförmige Rohrleitungselement an seinem oberen Ende einen ersten Teil (121) eines Anschlußelements (12) umfaßt, und daß
    b) das vertikale Steigrohr (5) an seinem unteren Ende mit einer beweglichen Kupplung (13) ausgerüstet ist und mit einem zweiten Teil (122) vom Anschlußelement (12) an der Unterseite der beweglichen Kupplung (13).
EP03749918A 2002-05-07 2003-05-05 Meeresboden/flächen-verbindungsinstallation für eine unterwasserrohrleitung, die durch mindestens ein durch eine basis gestütztes rohrkniestück mit einem steigrohr verbunden ist Expired - Lifetime EP1501999B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0205968A FR2839542B1 (fr) 2002-05-07 2002-05-07 Installation de liaison fond-surface d'une conduite sous- marine comprenant un element de conduite coude maintenu par une embase
FR0205968 2002-05-07
PCT/FR2003/001384 WO2003095788A1 (fr) 2002-05-07 2003-05-05 Installation de liaison fond-surface d'une conduite sous-marine reliee a un riser par un element de conduite soude maintenu par une embase

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EP1501999A1 EP1501999A1 (de) 2005-02-02
EP1501999B1 true EP1501999B1 (de) 2006-03-08

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US (1) US7025535B2 (de)
EP (1) EP1501999B1 (de)
AT (1) ATE319909T1 (de)
AU (1) AU2003249394A1 (de)
DE (1) DE60303941D1 (de)
FR (1) FR2839542B1 (de)
WO (1) WO2003095788A1 (de)

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Publication number Publication date
WO2003095788A1 (fr) 2003-11-20
FR2839542A1 (fr) 2003-11-14
AU2003249394A1 (en) 2003-11-11
FR2839542B1 (fr) 2004-11-19
DE60303941D1 (de) 2006-05-04
EP1501999A1 (de) 2005-02-02
WO2003095788A8 (fr) 2004-12-16
US7025535B2 (en) 2006-04-11
US20050271476A1 (en) 2005-12-08
ATE319909T1 (de) 2006-03-15

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