WO2014170615A1 - Support flottant ancré sur touret comprenant une conduite de guidage et de déport de conduite flexible au sein dudit touret - Google Patents
Support flottant ancré sur touret comprenant une conduite de guidage et de déport de conduite flexible au sein dudit touret Download PDFInfo
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- WO2014170615A1 WO2014170615A1 PCT/FR2014/050941 FR2014050941W WO2014170615A1 WO 2014170615 A1 WO2014170615 A1 WO 2014170615A1 FR 2014050941 W FR2014050941 W FR 2014050941W WO 2014170615 A1 WO2014170615 A1 WO 2014170615A1
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- WIPO (PCT)
- Prior art keywords
- floating support
- location
- pipes
- bottom wall
- guide
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 230000000284 resting effect Effects 0.000 claims description 17
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- 238000010168 coupling process Methods 0.000 claims description 10
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- 238000009826 distribution Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 10
- 210000002310 elbow joint Anatomy 0.000 claims 1
- JHJNPOSPVGRIAN-SFHVURJKSA-N n-[3-[(1s)-1-[[6-(3,4-dimethoxyphenyl)pyrazin-2-yl]amino]ethyl]phenyl]-5-methylpyridine-3-carboxamide Chemical compound C1=C(OC)C(OC)=CC=C1C1=CN=CC(N[C@@H](C)C=2C=C(NC(=O)C=3C=C(C)C=NC=3)C=CC=2)=N1 JHJNPOSPVGRIAN-SFHVURJKSA-N 0.000 description 7
- 239000002609 medium Substances 0.000 description 6
- 241000220317 Rosa Species 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
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- 239000013535 sea water Substances 0.000 description 2
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/507—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets
-
- 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
-
- 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
- B63B2035/448—Floating hydrocarbon production vessels, e.g. Floating Production Storage and Offloading vessels [FPSO]
Definitions
- An anchored floating support on a drum comprising a guide pipe and flexible pipe offset within said drum
- the present invention relates to a bottom-surface connection installation between a plurality of submarine pipes resting at the bottom of the sea and a floating support surface, comprising a plurality of flexible pipes whose upper end is integral with a drum substantially fixed relative to the seabed, the floating support pivoting freely around said drum, the latter being located at the front of the floating support or within said floating support, usually in the front third of said floating support.
- the present invention also relates to a said floating support anchored on a drum.
- the technical field of the invention is more particularly the field of the manufacture and installation of production risers for the underwater extraction of oil, gas or other soluble or fusible material or a suspension of mineral material from wellhead immersed to a floating support, 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 for oil production generally includes anchoring means to remain in position despite the effects of currents, winds and waves. It also generally comprises means for drilling, storage and treatment of oil and means of unloading to removing tankers, the latter occurring at regular intervals to perform the removal of production.
- the FPSO When the ocean-weather conditions, ie swell, wind and current are important, even extreme, in the case of storms, it is preferable to anchor the FPSO at a reel, usually located at known way forward or in the forward third of the ship and in the axis, the ship being free to turn around said reel according to the wind, the current and the swell.
- wind, current and waves exert specific forces on the hull and the superstructures, the FPSO because of its degree of freedom of rotation around the vertical axis ZZ, coming naturally to the position of least resistance.
- the pipes connecting the wellheads are generally connected on the underside of the drum and connected to the FPSO via a rotary joint integrated in the axis of the drum, generally located at the bridge of said FPSO .
- the FPSO When weather conditions can become extreme, such as in the North Sea, in the Gulf of Mexico or in the Arctic or Antarctic zone, the FPSO is generally disconnectable so that it can be sheltered waiting for acceptable operational conditions.
- a floating oil production support comprising a anchoring system anchor lines at the bottom of the sea and ground-surface connection pipes anchored on a drum comprises in known manner:
- a rotary device called a "drum”
- a drum comprising an internal cylindrical structure, preferably of circular section, within a cavity traversing the hull of the floating support over its entire height, said internal cylindrical structure being articulated in rotation with respect to said shell by means of rotation guide members, in particular at least one rolling or friction bearing, preferably a rolling bearing comprising rollers and guide tracks of said rollers, so as to allow the rotation of said floating support about a substantially vertical axis ZZ 'of said cylindrical internal structure and said cavity, without significantly causing the rotation of said cylindrical internal structure with respect to the same vertical axis ZZ' , and
- a lower mooring structure for docking on one side of said anchor lines and on the other hand the connection of first flexible pipes connected to subsea pipes lying at the bottom of the sea directly or via connecting pipes bottom-surface, said mooring structure being disposed below the hull of the floating support, fixed to a submerged bottom wall of said cylindrical internal structure, and thus integral with said cylindrical internal structure, so that the lines of mooring and said flexible pipes connected to it are not rotated when the floating support is rotated, and
- second flexible ducts connected to said first flexible ducts or in continuity thereof rising up within the cavity to a connection of the type referred to as a rotary joint connection, comprising a first portion secured to the bridge of said shell connected to a plurality of lines or lines at the deck, and a second portion secured to an upper platform of said cylindrical inner structure above the sea surface level, the upper ends of said second flexible pipes ascending within said internal cylindrical structure of the drum, being connected, generally via bent pipe elements, to said second coupling part, said first part of the connection secured to the floating support at the floating support bridge, being articulated in rotation with respect to said second portion of the integral connection of said cylindrical internal structure, via a rotating joint so as to allow the rotation of said floating support without causing rotation of the ends of said second flexible pipes within said cylindrical internal structure.
- the rolling bearing is either located at the floating support deck or located in the lower part in a wet zone, that is to say that the bearing is immersed, or in combination of the two previous configurations.
- said bottom wall of said cylindrical internal structure is assembled thereto in a sealed manner to prevent the immersed portion of the interior of said internal structure from being invaded by sea water.
- This sealing makes it easier maintenance operations and other personnel intervention in the drum including the connection of flexible pipes. But, above all, this sealing allows an Archimedean thrust to be applied to the volume displaced by said cylindrical internal structure of the drum and partially relieves the vertical forces generated by the anchoring lines, by said flexible conduits at the level of guide elements and compensates for the self-weight of said cylindrical internal structure.
- An oil field is generally composed of a plurality of wellheads located at variable distances up to several kilometers from the FPSO, each of which is connected by rigid or flexible pipes, umbilicals and electrical cables.
- the bottom-surface connection of a said wellhead comprises at least one production line for oil or the injection of water or gas, plus an umbilical for controlling the wellhead and, where appropriate one or more electric cables.
- These rigid or flexible pipes, umbilicals and cables are laid on the bottom of the sea next to each other and must not overlap on their course.
- said flexible pipes are arranged next to each other and close from each other, if necessary on one or more circles, in the same order as the ends of the pipes lying at the bottom of the sea, located next to each other at the level of the seabed 10.
- WO 2011/61422A1 of the Applicant describes an FPSO not equipped with a drum, but permanently anchored, heading north, on 16 lines of anchors, a plurality of bottom-surface links from the west, connecting all along the plating, thus constituting a large concentration of pipes from a single direction.
- a flexible suspension line connected to the drum exerts on the latter a voltage taken up by the drum at its connection to said drum, this voltage generates vertical forces (of force intensity F), and large horizontal forces (force intensity H), at their connection to the drum, especially in the case of bottom-surface connection of great depth. Consequently, a distribution of the irregular and / or asymmetric flexible pipes generates variations of forces and therefore of significant stresses along the periphery of the drum transferred and taken inhomogeneously, especially at the level of said rotating guide elements.
- the object of the present invention is to provide an improved anchored float carrier and an improved bottom-to-surface bonding facility that solves the above problems.
- the object of the present invention is to provide a floating support anchored on a drum and an improved bottom-surface connection system which makes it possible to better distribute the forces generated and transferred by the flexible pipes to the drum, in particular transferred around the periphery of the drum at the level of rotating guide elements undergoing forces vertical, so that said forces are distributed more evenly, more symmetrically and / or more uniformly in intensity along the periphery of the drum.
- the present invention provides a guiding structure and flexible pipe offset within said reel. More specifically, the present invention provides a floating oil production support supporting or capable of supporting bottom-surface connection pipes between a plurality of subsea pipes lying at the bottom of the sea and said floating support surface, said floating support comprising a drum comprising a cavity at least partly immersed in a structure offset at the front of the floating support or integrated in or below the hull of the floating support, preferably through the hull of the floating support over its entire height, said reel comprising a cylindrical internal structure within said cavity, preferably of circular section, said internal structure comprising a tubular side wall surmounted at its upper end with an upper platform arriving substantially at the level of the floating support bridge, said tubular side wall being at least partially closed at its lower end by a bottom wall, said cylindrical internal structure being traversed or adapted to be traversed by a plurality of first flexible pipes connected to said upper platform and extending below said bottom wall to submarine pipes resting at the bottom of the sea or up to second conduits themselves connected to submarine
- said bottom wall at a first location Cl of said bottom wall where said guide duct is fixed, said first location being preferably disposed at the periphery of said bottom wall, and
- an internal platform secured to said internal cylindrical structure above said bottom wall and above the level of the surface of the water, the upper end of said guide pipe being fixed to said internal platform at a second location C2 where the upper end of said flexible pipe contained in said guide pipe is fixed or capable of being fixed, said second location being non-aligned vertically with said first location, said second location being preferably disposed at the periphery of said internal platform.
- said flexible pipe passes through said bottom wall passing inside the guide pipe, without said flexible pipe is secured to said bottom wall.
- the upper end of said flexible pipe is attached to a connecting element itself attached to a said second location C2 where is connected said upper end of said first flexible pipe.
- the flexible pipes are not connected at the level of the bottom wall but only guided and retained laterally, and possibly in friction with the wall of said guide pipe especially at its passage through the bottom wall, most of the vertical forces generated by said flexible pipes are transferred to the level of said inner platform where they can be connected to the level of second locations second provisions in different arrangements than those of the first locations at said bottom wall and in particular so as to be able to transfer the forces generated by said first flexible pipes in a more regular distribution and / or more symmetrical at said second locations than at said first locations, particularly on the periphery of said inner platform vis-à-vis said rotational guiding elements.
- said first flexible conduits run through said cylindrical internal structure of the drum between said first locations and second locations arranged differently angularly, preferably in S-shaped shapes projected in a vertical plane, or in the form of a S-shaped left curve in the space. , or substantially rectilinear but inclined with respect to the vertical, and
- the forces transmitted by said upper ends of said first flexible pipes and taken up at said inner platform are distributed more homogeneously and / or more symmetrically around the perimeter of said inner platform than the forces transmitted by said first pipes; flexible and that would be taken up by the bottom wall at the levels of said first locations if said first flexible pipes were fixed there.
- said locations are located closer to the circumference than the center of said bottom wall or and respectively said internal platform, preferably as close as possible to the periphery, therefore rotational bearings, without to affect the solidity. More particularly, said first locations are arranged in a non-regular distribution and / or unsymmetrical along the periphery of said bottom wall.
- the number of said non-vertical guide pipes according to the invention will be from 1 to 100, preferably from 5 to 30.
- said non-vertical guide duct forms between said first location C1 and said second location C2 a deflection of an angle ⁇ of at least 5 ° in a horizontal plane between (a) a first vertical plane passing through the vertical axis ZZ 'of said cylindrical internal structure and the center of said first location C1 and a second vertical plane passing through the vertical axis of said cylindrical internal structure and the center of said second location C2.
- This value of ⁇ ⁇ 5 ° aims to mark the difference between a said non-vertical guide pipe according to the invention and a simple vertical defect of a vertical guide pipe type I-tube known to the man of the art in the field of offshore oil industry.
- said non-vertical guide duct performs between said first location C1 and said second location C2 a deflection of an angle ⁇ of at least 5 ° in a vertical plane between (a) the vertical line passing through the center of said first location C1 and the inclined line D passing through the two centers of said first and second locations C1, C2.
- This value of ⁇ ⁇ 5 ° is intended to mark the difference between a said non-vertical guide pipe according to the invention and a simple verticality defect of a vertical guide pipe type I-tube.
- the floating support according to the invention comprises a plurality of said non-vertical guide ducts of which said second locations C2 are arranged at the periphery of said circular internal platform in a more regular arrangement, preferably according to an arrangement of said second successive locations whose radial directions are spaced angularly at the same angle (gamma), and / or in a more symmetrical arrangement with respect to a diametrical plane LL than said first locations C1 disposed on the periphery of said circular bottom wall.
- said second locations C2 are arranged at the periphery of said circular internal platform in a more regular arrangement, preferably according to an arrangement of said second successive locations whose radial directions are spaced angularly at the same angle (gamma), and / or in a more symmetrical arrangement with respect to a diametrical plane LL than said first locations C1 disposed on the periphery of said circular bottom wall.
- said drum supports said first flexible pipes, at least a portion of said first flexible pipes passing through said non-vertical guide pipes disposed at said second locations so that the forces generated by said first pipes flexible are transferred and taken substantially more homogeneously and / or more symmetrical along the perimeter of the periphery of said inner platform that the forces generated by said first pipes at said first locations.
- said first pipes are disposed at said second locations so that the forces generated by said first pipes are distributed substantially homogeneously and / or symmetrically around the perimeter of said inner platform, preferably said second locations being substantially homogeneously and / or symmetrically disposed around the perimeter of said inner platform.
- said drum comprises at least one said guide ducts extending from a said first location at said bottom wall to a said second location at said substantially homogeneous and / or symmetrical on the periphery of the periphery of said internal platform, along a curved path in the shape of an S.
- S-shaped here means a curved shape in a plane with only one inflection point of curvature, or a left S-shape in three-dimensional space. More particularly, when the guide pipe is curved, the axis of the pipe is not contained in a vertical plane.
- said reel comprises at least one said guide duct extending from a said first location at the level of said bottom wall to a said second location at the level of said internal platform, along a path substantially rectilinear inclined ( ⁇ ).
- said floating support comprises:
- a said upper platform supporting at least a first part of a rotary joint connection arranged axially ZZ 'above the said internal platform
- said upper platform resting on first rotational guiding elements, preferably a first rolling bearing, and supporting a first part of said rotary coupling, said first part of said rotary coupling being integral with said upper platform, driving elements of elbow junction connecting the upper ends of said first flexible pipes at said inner platform said first portion of said connector, a second rotatable portion of said rotating connector being supported by the bridge of the floating support, and
- a so-called sealed cylindrical internal structure preferably of circular section along said vertical axis ZZ ', comprising a bottom wall sealingly assembled at the lower end of a lateral tubular wall of said tubular internal structure, and
- a lower mooring structure preferably of annular shape coaxial with said cylindrical internal structure, connected to said bottom wall, in the underside of said bottom wall, anchoring lines extending from said lower structure of mooring where they are moored to the bottom of the sea and said first flexible pipes passing through said lower mooring structure.
- said reel comprises: a said upper platform bearing on a first rolling bearing disposed at a step at the upper end of the said cavity, preferably so that the said upper platform does not exceed the height of the support bridge in height; floating, and - said circular tubular lateral wall of said cylindrical tubular internal structure cooperates with at least second and third lateral bearing or friction bearings, preferably rolling bearings, interposed between the cylindrical side wall of said cavity said lateral tubular wall of said cylindrical internal structure and allowing the rotation of said internal structure, said third rolling or friction bearing being located below said second lateral bearing, said second bearing being preferably above the surface of the water , close to the level of said internal platform, said third lateral bearing being located near the level of said bottom wall.
- said cylindrical internal structure is articulated in rotation with respect to said cavity and said shell by means of said rotational guiding elements, preferably at least one rolling or friction bearing, so as to allow the rotation of said floating support around a substantially vertical axis ZZ 'of the cavity of said drum, without causing the rotation of said cylindrical internal structure of said drum relative to the same vertical axis ZZ', said mooring lines and first flexible pipes extending below the drum being adapted to remain fixed in rotation about the axis ZZ 'relative to the seabed, when said floating support is rotated about the vertical axis ZZ' of said cylindrical internal structure or said cavity of the drum, and
- said first part of the rotating connection cooperates sealingly with the second part of the rotating connection so as to ensure the transfer of fluid or electrical currents from or to the hoses and electrical cables, while allowing the rotation of said floating support (and of said second part of the rotating connection) about a substantially vertical axis ZZ 'of the cavity of said reel, without causing the rotation of said first flexible pipes within said cylindrical internal structure with respect to the same vertical axis ZZ.
- said bearing (s) is (are) constituted by rollers or rollers guided in raceways, said raceways and said rollers or rollers being arranged circularly around said internal structure, preferably regularly spaced.
- the present invention also provides a bottom-surface connection installation comprising a floating support according to the invention characterized in that it further comprises at least a second rigid pipe providing the connection between the lower end of a said first flexible pipe. extending below said drum and the end of an underwater pipe resting at the bottom of the sea.
- said second rigid pipe is arranged in a riser substantially vertically, said first flexible pipe to which it is connected adopting a form of double plunging chain.
- said second rigid pipe is of the type called SCR, extending in a simple chain-like curve form between the end of a pipe resting at the bottom of the sea and the lower end of the pipe. a said first flexible pipe opening below said drum and in continuity of curvature of said first flexible pipe.
- FIG. 1 is a side view of an FPSO 1 equipped with a drum 2 located in the forward third of the hull, anchored in the and having bottom-surface connection lines 4, 8 to the lines under -marines 9 resting at the bottom of the sea 10
- FIG. 2 is a section cut away and seen from the side of a drum 2 integrated into the shell of an FPSO 1 according to the invention, detailing the path of an S-shaped guide duct according to the invention, a flexible pipe 4 from the bottom wall 2b of said drum 2, to an inner platform 6 located in the plane BB, at a higher level of said drum, said BB plane being disposed widely above the water level 11 addition of the strongest swells, when said FPSO 1 is ballasted to the maximum,
- FIG. 3 is a view detailing the connection of the upper end of the flexible pipes 4 at connection elements
- FIG. 4 is a representation of the "rose wind” type of the distribution of the vertical forces at the periphery of a drum, created by the set of flexible pipes 4 connected to the latter, in a conventional configuration of the prior art,
- FIG. 5A is a section of a drum 2 according to the invention at the level of the plane AA of FIG. 2, detailing the location of the various flexible pipes, umbilicals and electrical cables 4, of small 4c, of average 4b and of large size 4a,
- FIG. 5B is a section of the same drum according to the invention as that of Figure 5A, made at the plane BB of Figure 2, detailing the reorganization of various flexible pipes, umbilical and electric cables, small, average and large, and the new "rose forces" R 'resulting from this reorganization, said second locations of first flexible pipes being schematized in hatching when they are deported relative to said first locations, the latter being represented in dashed lines ; and
- FIG. 6A is a vertical sectional view of the drum comprising a guide and offset duct according to the invention that is rectilinear and inclined and a known vertical guide duct 5b, and
- FIG. 6B is a horizontal sectional view along the plane BB of the device of Figure 6A showing an offset of the guide pipe 5 according to the invention.
- FIG. 1 there is shown in side view a floating support type "FPSO" 1 integral with a drum 2 located in the front third of said FPSO. Said drum 2 is anchored by a plurality of anchor lines connected to unrepresented anchors planted in the underwater soil 10.
- the drum known to those skilled in the art, is shown in section in FIG. and has an internal cylindrical structure 2a substantially fixed in rotation around the axis ZZ with respect to the seabed 10, inside a cavity 2d passing right through the shell 1 of the floating support 1.
- the drum 2 is consisting of a tubular structure 2a sealed at its lower end by a bottom wall 2b and comprising at its upper end an upper platform 2c, larger in diameter than the side tubular wall 2a, said platform 2c bearing, in its peripheral parts protruding from the side tubular wall 2a, against the redan the at the upper end of the cavity 2d.
- Said internal cylindrical structure 2a and the shell cooperate in relative rotation by rolling bearings 2al, 2a2 and 2a3 comprising two lateral circular upper guide bearings 2a2 and lower 2a3 which transfer the horizontal forces between the drum and the structure of the FPSO and a circular support upper bearing bearing 2al which transfers all the vertical forces between the upper platform 2c of the drum and the bridge of the FPSO.
- Said bearings 2a1, 2a2, 2a3 are friction or rolling bearings, preferably rolling bearings. It may be more particularly rollers or rollers interposed between: the inner wall of the cavity 2d and the external surface of the lateral tubular wall 2a, with regard to the rollers or the lateral guiding rollers 2a2 and 2a3, and
- said tubular structure 2 and said inner wall cavity 2d have a circular section.
- the rollers or rollers of the lower and upper lateral guide bearings 2a2 and 2a3 are more particularly arranged with their axes of rotation in a vertical position.
- said rollers or rollers are arranged with their axes of rotation in a horizontal position bearing on the redan the platform 2d resting on the edge of said rollers 2al.
- FIGs 1 and 2 there is also shown the lower mooring structure 2-1 fixed on the underside of the bottom wall 2b and on which are fixed the lines of anchors la.
- the lower structure 2-1 has an annular shape and is crossed at its center by a plurality of said first flexible pipes including production lines but also umbilicals and electrical cables 4 of various sizes, light 4c, medium 4b and heavy 4a which pass through the bottom wall passing inside the ends 5a of guide ducts 5 supported and passing through the bottom wall 2b and then back to the inside of the cylindrical sealed structure 2a guided by non-vertical guide ducts 5 according to the invention and for some in vertical guide pipes 5b of the prior art.
- first flexible pipes 4 opening out of the upper ends 5c of the guide pipes passing through the internal platform 6, are connected to connecting elements 6a supported by an internal platform 6 fixed inside and at the top of said internal structure 2 below the rotary joint connection 3, the lower part 3-2 being supported axially by the upper platform 2c of the internal cylindrical structure 2a.
- bent junction lines 7 provide the junction of the upper ends 4-3 of the first flexible ducts. 4 between the inner platform 6 and the rotary joint coupling 3-2.
- the ground-water connection pipes, as well as the pipes 9 resting on the sea floor are generally flexible pipes, such as pipes manufactured for the oil industry by Technip (France) or Wellstream (USA).
- the depth of water exceeds 1000-1500m, it is preferred to install, for the production or injection pipes of water or gas, second rigid steel pipes 8, isolated or not, between the sub-pipes. marine 9 resting at the bottom of the sea and said first flexible pipes opening subsurface below the drum FPSO.
- a second rigid pipe 8 connecting the bottom of the sea to the end of a first flexible pipe 4 at a float 12 at a distance below sea level of the order of 50 at 100m.
- Said second rigid pipe 8 may be vertical (not shown) or SCR type ("steel catenary riser") in the form of a so-called chain curve, characteristics in general equivalent to those of the production lines, the connection with the FPSO then being ensured by first flexible pipes in 4-2 double plunge chain configuration.
- SCR steerel catenary riser
- the upper portion of the bottom-surface connection can then consist of a portion of flexible pipe 4-1, providing a flexible connection with the drum 2 of the FPSO, said portion of first pipe flexible 4 then being in continuity of curvature with the upper end of the second rigid conduit 8 SCR type and preferably the same internal diameter, and a total length, for example, 50 to 100m.
- the forces generated by the bottom surface connection line 4, 8 on the drum are very important because of the height of the water slice which in this case must be greater than 750-1000m.
- FIG. 4 illustrates the effects of this case in an embodiment according to the prior art when the first flexible pipes 4 are connected to the bottom wall and the forces are essentially taken up and transferred by said bottom wall of the drum.
- the rolling tracks and the rotation bearings 2al, 2a2, 2a3 are permanently subjected to vertical forces (2al) and less horizontal (2a2 and 2a3) which vary from a null value to a maximum value as explained previously, which induces a localized fatigue all the more important that the ranges of angular variations of the FPSO are often reduced to a limited sector, for example the 260 ° deposit at the 325 ° deposit, corresponding for example to 90% of the time when the resulting from the effects of swell, wind and currents on the FPSO, keeps it in this range of deposit.
- FIG. 2 shows in section a drum 2 of an FPSO 1 traversed from the bottom upwards by a rigid steel-shaped guide pipe 5.
- Said guide pipe 5 is equipped in the lower part with a trumpet-shaped chute 5a intended to prevent damage to the flexible pipe 4 that it contains and guides in the contact zone when it arrives in the lower end of the guide pipe.
- Said guide duct 5 sealingly traverses the bottom wall 2b of the drum at a first location centered at C1 at the periphery of the bottom wall.
- the upper part of said guide duct 5 is secured 6b to an internal support platform 6 integral with the internal cylindrical structure 2a of the drum 2 in the plane BB above the surface of the seawater and below the upper platform 2c of the drum.
- Said inner platform 6 also supports the upper end of said first flexible pipe contained in said guide pipe equipped with a connecting element 6a opening out of the guide pipe.
- the inner platform 6 supports all of said first flexible pipes, and therefore substantially all of the vertical forces of each of said flexible pipes.
- the upper end of said pipe 4 is connected via a connecting pipe element 7 to a part 3-2 of the rotary joint connection 3.
- Said part 3-2 of the coupling 3 is integral with the drum, and thus substantially fixed in rotation by relative to the seabed. Then, the fluid emerges from the part 3-1 of the coupling 3 integral with the bridge 1b and the upper platform 2c, by a pipe 13.
- the part 3-1 of the rotary joint coupling 3 is integral with FPSO bridge 1 and is therefore in free rotation about the axis ZZ 'of the drum 2 relative to the portion 3-2 integral with the drum 2.
- FIG. 5A which corresponds to a sectional view of the section of the plane AA of FIG. 2, shows all the flexible pipes 4, 4a, 4b, 4c which are not connected at the level of the bottom wall but are contained and guided in guide ducts which pass through the bottom wall 2b at first locations centered in Cl according to a distribution imposed by the architecture of the field as explained above with reference to FIG. are substantially completely transferred to the inner platform 6 where the pipes are suspended.
- FIG. 5A shows four guide and offset ducts 5 according to the invention for heavy flexible pipes 4a-2 to 4a-5, as well as two guide and offset ducts 5 for medium flexible pipes 4b-1 and 4b-2 and a plurality of other conventional vertical guideways for medium and small flexible pipes, distributed around the periphery.
- said flexible pipe guide ducts 4a-2 to 4a-5 are S-shaped guide ducts according to the invention, whereas the other ducts guide, and in particular the guide duct of the flexible pipe 4a-1 are conventional ducts type I-pipes (English I-tube) known to those skilled in the art in the field of oil exploitation 5B in FIG. 5B shows the position of the upper ends 5c of the guide pipes 5 of the same flexible pipes 4a-2 to 4a-5 fixed 6b on the periphery of the platform 6 in second locations centered in C2.
- the heavy flexible pipe 4a-1 is substantially at the same position at the head as at the bottom (FIG. 5A), and its guide pipe is of the I-pipe type, which is substantially vertical.
- the flexible pipes 4a-2 to 4a-5 are offset thanks to the S-guide ducts according to the invention and are then advantageously distributed evenly over the periphery, substantially every 60 ° (Y) along the LL-MM axes. - NN, and substantially symmetrically with respect to LL.
- the respective offset of the second locations C2 with respect to the first locations C1 is represented by an arrow in this FIG. 5B and corresponds to an angle a2 to a5 greater than 5 °, in particular here from 10 to 60 °, in a horizontal plane between the planes. substantially vertical radials containing the axis ZZ 'and passing through C1 and C2 respectively.
- the two medium flexible pipes 4b-1 and 4b-2 are brought closer to one another by means of two S-shaped guide pipes, substantially symmetrically with respect to the axis LL, and creating a minor offset of the order of 5 to 8 °.
- S-shaped guide ducts in a plane or in three-dimensional space, because it is thus easier to arrange a greater number of ducts of guidance in the interior of the drum without risking interference between said pipes 5, or congested areas thus limiting the possibilities of access for inspection and maintenance.
- an FPSO drum runs completely through the hull of the floating support over a height of 30 to 55 m in height, its diameter is 10 to 25 m, in particular 12 to 16 m, and its own weight is about 2500 to 5000 tons. All the vertical forces due to the bottom-surface connection pipes can reach 5000 to 7500 tons or even 10000 tons.
- the large flexible pipes at great depth of water can each generate forces of 100 to 250 tonnes, in the case of 4-2 chains as described with reference to Figure 1, in the case of rigid pipes in SCR configuration 8 , 4-1, the vertical forces can reach 750 to 1,000, or even more, for each of the lines. It is thus possible to install a large number of pipes, gases, raw products, hydraulic umbilicals and electrical cables 4a-4c, for example 36 or 48 flexible pipes 4, regardless of the architecture of the field and the location of the various wellheads around the FPSO.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2014255525A AU2014255525B2 (en) | 2013-04-19 | 2014-04-17 | Floating support anchored on a reel comprising a guide and deflection conduit for flexible pipes within said reel |
US14/785,546 US9688360B2 (en) | 2013-04-19 | 2014-04-17 | Floating support anchored on a reel comprising a guide and deflection conduit for flexible pipes within said reel |
EP14722287.1A EP2986497B1 (fr) | 2013-04-19 | 2014-04-17 | Support flottant ancré sur touret comprenant une conduite de guidage et de déport de conduite flexible au sein dudit touret |
BR112015025097A BR112015025097A2 (pt) | 2013-04-19 | 2014-04-17 | suporte flutuante de produção petrolífera e instalação de ligação fundo-superfície |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1353618 | 2013-04-19 | ||
FR1353618A FR3004693B1 (fr) | 2013-04-19 | 2013-04-19 | Support flottant ancre sur touret comprenant une conduite de guidage et de deport de conduite flexible au sein dudit touret |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014170615A1 true WO2014170615A1 (fr) | 2014-10-23 |
Family
ID=48782416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2014/050941 WO2014170615A1 (fr) | 2013-04-19 | 2014-04-17 | Support flottant ancré sur touret comprenant une conduite de guidage et de déport de conduite flexible au sein dudit touret |
Country Status (6)
Country | Link |
---|---|
US (1) | US9688360B2 (fr) |
EP (1) | EP2986497B1 (fr) |
AU (1) | AU2014255525B2 (fr) |
BR (1) | BR112015025097A2 (fr) |
FR (1) | FR3004693B1 (fr) |
WO (1) | WO2014170615A1 (fr) |
Families Citing this family (1)
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US9989038B2 (en) * | 2015-12-18 | 2018-06-05 | Gerald L. Barber | Wind turbine with improved safety features |
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US4305341A (en) * | 1979-10-09 | 1981-12-15 | Chicago Bridge & Iron Company | Spindle moored ship |
GB2122139A (en) * | 1982-06-22 | 1984-01-11 | Mobil Oil Corp | A moonpool plug for connecting a flexible flowline to a process vessel |
WO1993024733A1 (fr) * | 1992-05-25 | 1993-12-09 | Den Norske Stats Oljeselskap A.S. | Systeme utilise pour la production de petrole sous-marin |
US5823837A (en) * | 1997-11-20 | 1998-10-20 | Fmc Corporation | Turret mooring system with product swivel stack |
WO1999017983A1 (fr) * | 1997-10-08 | 1999-04-15 | Hitec Systems As | Dispositif de pivot |
US6014939A (en) * | 1997-01-29 | 2000-01-18 | Hydralift, Inc. | Universally stable oil well ship turret |
WO2001051347A1 (fr) * | 2000-01-13 | 2001-07-19 | Den Norske Stats Oljeselskap A.S. | Systeme de tour rotative permettant de transferer des hydrocarbures dans un bateau |
FR2928899A1 (fr) * | 2008-03-21 | 2009-09-25 | Saipem S A Sa | Support flottant equipe de touret comprenant des paliers de roulement hors d'eau |
WO2009122099A1 (fr) | 2008-03-21 | 2009-10-08 | Saipem S.A. | Support comprenant un touret equipe d'une bouee d'amarrage de conduites de liaison fond/surface deconnectable |
WO2009150142A1 (fr) * | 2008-06-09 | 2009-12-17 | Technip France | Installation d'extraction d'un fluide d'une masse d'eau et procédé associé |
WO2010026334A1 (fr) | 2008-09-05 | 2010-03-11 | Saipem S.A. | Support flottant comprenant un touret equipe de deux bouees d'amarrage de lignes d'ancrage et de conduites de liaison fond/surface |
WO2011014684A1 (fr) | 2009-07-29 | 2011-02-03 | Fisker Automotive, Inc. | Ensemble vitre réglable |
WO2011061422A1 (fr) | 2009-11-17 | 2011-05-26 | Saipem S.A. | Installation de liaisons fond-surface disposees en eventail |
Family Cites Families (2)
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US5517937A (en) * | 1995-03-03 | 1996-05-21 | Imodco, Inc. | Offshore turret system |
WO2014043126A2 (fr) * | 2012-09-11 | 2014-03-20 | Oil States Industries, Inc. | Système de colonne montante hydride autoportante comprenant une configuration inférieure à charnière de tuyau flexible et raccord de tuyau sans plongeur |
-
2013
- 2013-04-19 FR FR1353618A patent/FR3004693B1/fr not_active Expired - Fee Related
-
2014
- 2014-04-17 AU AU2014255525A patent/AU2014255525B2/en not_active Ceased
- 2014-04-17 BR BR112015025097A patent/BR112015025097A2/pt active Search and Examination
- 2014-04-17 US US14/785,546 patent/US9688360B2/en active Active
- 2014-04-17 WO PCT/FR2014/050941 patent/WO2014170615A1/fr active Application Filing
- 2014-04-17 EP EP14722287.1A patent/EP2986497B1/fr active Active
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4305341A (en) * | 1979-10-09 | 1981-12-15 | Chicago Bridge & Iron Company | Spindle moored ship |
GB2122139A (en) * | 1982-06-22 | 1984-01-11 | Mobil Oil Corp | A moonpool plug for connecting a flexible flowline to a process vessel |
WO1993024733A1 (fr) * | 1992-05-25 | 1993-12-09 | Den Norske Stats Oljeselskap A.S. | Systeme utilise pour la production de petrole sous-marin |
US6014939A (en) * | 1997-01-29 | 2000-01-18 | Hydralift, Inc. | Universally stable oil well ship turret |
WO1999017983A1 (fr) * | 1997-10-08 | 1999-04-15 | Hitec Systems As | Dispositif de pivot |
US5823837A (en) * | 1997-11-20 | 1998-10-20 | Fmc Corporation | Turret mooring system with product swivel stack |
WO2001051347A1 (fr) * | 2000-01-13 | 2001-07-19 | Den Norske Stats Oljeselskap A.S. | Systeme de tour rotative permettant de transferer des hydrocarbures dans un bateau |
FR2928899A1 (fr) * | 2008-03-21 | 2009-09-25 | Saipem S A Sa | Support flottant equipe de touret comprenant des paliers de roulement hors d'eau |
WO2009122098A2 (fr) | 2008-03-21 | 2009-10-08 | Saipem S.A. | Support flottant equipe de touret comprenant des paliers de roulement hors d'eau |
WO2009122099A1 (fr) | 2008-03-21 | 2009-10-08 | Saipem S.A. | Support comprenant un touret equipe d'une bouee d'amarrage de conduites de liaison fond/surface deconnectable |
WO2009150142A1 (fr) * | 2008-06-09 | 2009-12-17 | Technip France | Installation d'extraction d'un fluide d'une masse d'eau et procédé associé |
WO2010026334A1 (fr) | 2008-09-05 | 2010-03-11 | Saipem S.A. | Support flottant comprenant un touret equipe de deux bouees d'amarrage de lignes d'ancrage et de conduites de liaison fond/surface |
FR2935679A1 (fr) * | 2008-09-05 | 2010-03-12 | Saipem Sa | Support flottant comprenant un touret equipe de deux bouees d'amarrage de lignes d'ancrage et de conduites de liaison fond/surface |
WO2011014684A1 (fr) | 2009-07-29 | 2011-02-03 | Fisker Automotive, Inc. | Ensemble vitre réglable |
WO2011061422A1 (fr) | 2009-11-17 | 2011-05-26 | Saipem S.A. | Installation de liaisons fond-surface disposees en eventail |
Also Published As
Publication number | Publication date |
---|---|
AU2014255525B2 (en) | 2016-04-28 |
EP2986497A1 (fr) | 2016-02-24 |
BR112015025097A2 (pt) | 2017-07-18 |
AU2014255525A1 (en) | 2015-10-22 |
US20160096593A1 (en) | 2016-04-07 |
US9688360B2 (en) | 2017-06-27 |
EP2986497B1 (fr) | 2017-05-31 |
FR3004693B1 (fr) | 2015-05-15 |
FR3004693A1 (fr) | 2014-10-24 |
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