WO2003016127A1 - Dispositif de mouillage et de transfert de fluide - Google Patents

Dispositif de mouillage et de transfert de fluide Download PDF

Info

Publication number
WO2003016127A1
WO2003016127A1 PCT/GB2002/003761 GB0203761W WO03016127A1 WO 2003016127 A1 WO2003016127 A1 WO 2003016127A1 GB 0203761 W GB0203761 W GB 0203761W WO 03016127 A1 WO03016127 A1 WO 03016127A1
Authority
WO
WIPO (PCT)
Prior art keywords
ship
riser
turret
line
riser line
Prior art date
Application number
PCT/GB2002/003761
Other languages
English (en)
Inventor
Roderick Charles Tasman Rainey
Neil Atkins
Original Assignee
W S Atkins Plc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by W S Atkins Plc filed Critical W S Atkins Plc
Publication of WO2003016127A1 publication Critical patent/WO2003016127A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
    • B63B27/34—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures using pipe-lines
    • 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 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines

Definitions

  • the invention relates to mooring and fluid transfer apparatus for a ship, especially for a ship which is being used as a floating platform in an offshore oil field. '
  • Ships are increasingly employed as floating platforms in offshore oil fields, and perform a variety of roles for the production, drilling, well intervention, storage and offloading of oil.
  • Such ships typically comprise a cylindrical turret, which is mounted in a bore which extends from the deck of the ship to the keel of the ship.
  • Such turrets are called “internal" turrets.
  • the turret is rotatably mounted, and is also moored to the seabed.
  • Wind and waves will cause the ship to rotate (“weathervane") about the turret.
  • Riser lines extend from an underwater installation for producing, storing or offloading oil up through the turret to piping on the ship.
  • riser lines are flexible to allow them to accommodate relative movement caused by wind and waves. However, they may be damaged by excessive twisting about their own axis.
  • the riser lines therefore pass through a multi-path swivel or other means for accommodating rotation so that the riser lines are not twisted, and so damaged, when the ship rotates.
  • Such devices for accommodating rotation are complicated, and therefore expensive.
  • the invention provides mooring and fluid transfer apparatus for a ship, the apparatus comprising a turret, means for mooring the turret to the seabed, means for allowing the ship to rotate about the turret, and first and second riser lines for transferring fluid to the ship, the first riser line being connected to the second riser line, substantially all of which is mounted within the ship, and the first riser line being mounted such that it does not rotate with the ship, and the second riser line being mounted such that it does rotate with the ship, the second riser line being flexible so that as the ship rotates, it twists to accommodate the rotation of the ship.
  • the invention uses first and second riser lines to transfer fluid to the ship, one of which, the second riser line, is flexible so that it is able to twist to accommodate the rotation of the ship, thereby avoiding the need for a multi-path swivel or other similarly expensive means for accommodating rotation of the ship.
  • the second riser line may comprise swivel means to allow the riser line to twist about its axis.
  • the second riser line will usually be mounted so that its axis is not in line with the axis of rotation of the ship.
  • the second riser line will therefore be subject to twisting about the axis of rotation of the ship, as well as to twisting about its axis.
  • Conventional riser lines are flexible to allow them to accommodate relative movement caused by wind and waves, but may be damaged by excessive twisting about their own axis.
  • Conventional riser lines will therefore be able to twist about the axis of rotation of the ship, but they will not be able to twist about their own axis without risking damage.
  • a conventional riser line may be used for the second riser line, but a swivel means should preferably be used to prevent damage caused by twisting about its own axis.
  • the means for allowing the ship to rotate about the turret may comprise a bearing.
  • the bearing may be positioned on or near the deck of the ship. This will allow ready access to the bearing, and avoids the need for a seal to keep out seawater.
  • the bearing may be positioned on or near the keel of the ship. Access may be more difficult, and a seal may be required to keep out seawater. However, it may be possible to have a smaller turret, thereby reducing costs.
  • the apparatus may comprise a plurality of first and second riser lines.
  • the first riser lines will not rotate with the ship, and so the first riser lines may originate from different underwater installations, if desired.
  • the apparatus may comprise means for radially spacing the second riser lines in order to prevent them from being damaged by rubbing against each other as they twist to accommodate the rotation of the ship.
  • the spacing means may comprise a core member which extends along at least a part of the turret and keeps the second riser lines spaced apart along its length, thereby reducing damage caused by rubbing.
  • the apparatus may comprise means for supporting the second riser lines, thereby relieving tension in the riser lines.
  • the support means may comprise a plate comprising a plurality of means for receiving a second riser line, the means being spaced apart from one another, thereby further reducing damage caused by rubbing.
  • One end of the second riser line may be movably mounted to accommodate shortening of the second riser line on twisting.
  • the end of the riser line may be freely movable. Such an arrangement is suitable for low loads, but it may not be suitable for high loads. Accordingly, the end of the second riser line may alternatively be moved by means of an active drive system.
  • the plate maybe movably mounted to accommodate shortening of the second riser line.
  • the plate may be slidably mounted on the core member.
  • connection between the first riser line and the second riser line may be in any suitable position provided that substantially all of the second riser line is mounted within the ship.
  • the second riser line may extend substantially from the deck of the ship to the keel of the ship.
  • One end of the second riser line may be mounted on the turret.
  • Figure 1 shows a floating production storage offloading ship (FPSO) having a known mooring and fluid transfer apparatus
  • Figure 2 shows the turret of the apparatus of Figure 1;
  • Figure 3 shows the multi-path swivel of the turret of Figure 1;
  • Figure 4 shows a known "drag chain” system which may be used instead of the multi-path swivel of Figure 3;
  • Figure 5 shows a mooring and fluid transfer apparatus according to the invention
  • Figure 6 shows a cross-sectional view along line A- A of the turret of the apparatus of Figure 5;
  • Figure 7 shows an alternative mounting arrangement for the termination plate of Figure 5;
  • Figure 8 shows a cross-sectional view taken along line B-B of the termination plate of the apparatus of Figure 7;
  • Figure 9 shows in schematic form a second embodiment of a mooring and fluid transfer apparatus according to the invention.
  • FIGs 1, 2 and 3 illustrate a floating production storage offloading ship (FPSO) 1 having a known mooring and fluid transfer apparatus 2.
  • the apparatus 2 comprises a turret 3, which is mounted in a cylindrical bore which extends from the deck of the ship 1 to the keel of the ship 1. Such turrets are called “internal" turrets.
  • the turret 3 is rotatably mounted, and is also moored to the seabed via mooring chains 4.
  • wind and waves will cause the ship 1 to rotate (“weathervane") about the turret 3, which is prevented from rotating by the mooring chains 4.
  • Riser lines 5 extend from an underwater installation for producing, storing or offloading oil up through the turret 3 into a multi-path swivel 6 at the deck level of the ship 1.
  • the riser lines 5 are flexible to allow for relative movement caused by wind and waves.
  • the multi-path swivel 6 connects the risers 5 to piping on the ship 1, and accommodates rotation of the ship 1 so that the risers 5 are not twisted, and so damaged, when the ship rotates.
  • the multi-path swivel 6 includes large number of separate paths 7 to cater for the differing needs of various oil wells, as well as for injecting water or gas back into the oil field, and exporting processed oil or gas.
  • Figure 4 shows a known "drag chain” system 8 which may be used instead of the multi-path swivel 6 of Figure 3.
  • the riser lines 5 are laid out on the deck of the turret 3 so as to allow the risers 5 to unwind without twisting as the ship weathervanes.
  • Figures 5 and 6 show a mooring and fluid transfer apparatus for a ship comprising a turret 9, means 10 for mooring the turret to the seabed, means 11 for allowing the ship to rotate about the turret 9, and first and second riser lines 12, 13 for transferring fluid to the ship, the first riser line 12 being connected to the second riser line 13, substantially all of which is mounted within the ship, and the first riser line 12 being mounted such that it does not rotate with the ship, and the second riser line 13 being mounted such that it does rotate with the ship, the second riser line 13 being flexible so that as the ship rotates, the second riser line 13 twists to accommodate the rotation of the ship.
  • the ship has a cylindrical bore 14, which extends from the deck 15 of the ship to the keel 16 of the ship.
  • the bore 14 accommodates a cylindrical turret 9.
  • the turret 9 extends from the deck 15 to the keel 16 of the ship.
  • the turret 9 includes a conventional mooring spider 10, which is provided with a number of chains 17 for mooring the turret 9 to the seabed.
  • the turret 9 includes an annular flange 18, which rests on a first bearing arrangement 19 mounted on the deck 15 of the ship.
  • the bearing 19 provides both axial and radial support, and allows the ship to rotate relative to the turret 9, the turret being moored to the seabed so that it cannot rotate.
  • a (second bearing arrangement 20 is also provided at the lower end of the bore 14 to provide further radial support.
  • a plurality of internal (second) riser lines 13 are accommodated inside the turret 9 and. extend from the deck 15 to the keel 16 of the ship.
  • the internal riser lines 13 are mounted in a circular array around the inner circumference of the turret 9 (see Figure 6).
  • Each internal riser line 13 is connected to piping (not shown) on the ship at its upper end, and to a flanged connector (not shown) attached to the turret 9 at its lower end.
  • Each connector connects an internal riser line 13 to an external (first) riser line 12 which extends to an underwater installation for producing, storing or offloading oil.
  • the mooring spider 10 is moored to the seabed, and so cannot rotate. Thus, the external riser lines 12 will not rotate with the ship.
  • the internal riser lines 13 are connected to the ship at their deck end via the piping, and so the internal riser lines 13 will rotate with the ship.
  • Conventional riser lines are used for both the external 12 and internal 13 riser lines. As the internal riser lines 13 are mounted in a circular array, the axis of each internal riser line 13 will not be in line with the axis of rotation of the ship. Each internal riser lines 13 will therefore be subject to twisting about the axis of rotation of the ship as well as to twisting about its own axis. Conventional riser lines are flexible to allow them to accommodate relative movement caused by wind and waves, but may be damaged by excessive twisting about their own axis.
  • the conventional riser lines will be able to twist about the axis of rotation of the ship, but a single path swivel (not shown) is attached to the fixed end of each internal riser line 13 in order to accommodate the twisting of the internal riser lines 13 about their own axis, so preventing damage to the internal riser lines 13.
  • the riser lines 13 may also be damaged by rubbing against each other as they twist to accommodate the rotation of the ship. This is prevented by providing the turret 9 with a circular termination plate 23 and a central core 24 which extends from the top to the bottom of the turret 9.
  • the termination plate 23 is provided with a plurality of flanged connectors 25 positioned about the circumference of the termination plate 23 so that each connector 25 is equidistant from adjacent apertures.
  • the termination plate 23 also has a central aperture 26 which receives the core 24.
  • An internal riser line 13 is fixed to each aperture 25, and the internal riser lines 13 are therefore held in a circular array, spaced apart from one another, at the level of the termination plate 23.
  • the central core 24 passes through the centre of the circular array of internal riser lines 12, and so retains the internal riser lines 13 in their circular array throughout the whole length of the core 24.
  • the termination plate 23 is slidably and freely mounted on the central core 24. Thus, the termination plate 23 is free to move to accommodate any shortening of the internal riser lines 13 caused by twisting of the riser lines.
  • Figures 7 and 8 show an alternative mounting arrangement for the termination plate of Figures 5 and 6, which is suitable for use at high loads.
  • the termination plate 23 is not freely mounted on the central core 24, but is instead moved by four screw jacks 27 each driven by a motor 28.
  • the screw jacks 27 allow vertical movement.
  • the screw jacks 27 may be replaced by hydraulic jacks, but screw jacks are preferred as there will be no creep, and the screw jacks may be manually controlled in the event of failure of the motors.
  • screw jacks it is easier to accommodate the non-linear relationship between rotation and vertical movement required to control the load in the risers.
  • Figure 9 shows a schematic view of a second embodiment of the mooring apparatus according to the invention.
  • the main difference between the embodiment of Figure 9 and the embodiment of Figure 5 is that the bearing arrangement 29 which supports the turret 30 is mounted near the keel 16 of the ship. This means that the turret 30 can be much smaller than the turret 9 shown in the embodiment of Figure 5.
  • the embodiment of Figure 9 also uses a seal (not shown) to keep seawater away from the bearing arrangement 29.
  • the internal riser lines 13 extend from the deck 15 of the ship to the keel 16 of the ship as in the embodiment of Figure 5. Each internal riser line 13 is connected to a pipe termination 31 at its upper end, and to the turret 30 at its lower end.
  • the turret 30 is moored to the seabed as in the embodiment of Figure 5, and so cannot rotate.
  • the pipe termination 31 rotates with the ship, and so the internal riser lines 13 will also rotate with the ship and twist to accommodate that rotation as in the embodiment of Figure 5.
  • a single path swivel 32 is attached to the end of each internal riser line 13 in order to accommodate twisting of the internal riser lines 13 about their own axis.
  • Figure 9 is similar to that of Figure 5.
  • the embodiment of Figure 5 provides better access to the bearing, and does not necessitate the use of a seal to keep out seawater.
  • the embodiment of Figure 9 uses a smaller turret, thereby reducing costs.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

La présente invention concerne un dispositif de mouillage et de transfert de fluide destiné à un navire. Ce dispositif comprend une tourelle, un organe destiné à mouiller cette tourelle dans le fond marin, un organe permettant au navire de tourner autour de la tourelle et une première et une seconde conduite destinées à transférer un fluide vers le navire, cette première conduite de remontée étant connectée à la seconde conduite de remontée. Toutes ces conduites sont essentiellement montées dans le navire, le première conduite de remontée étant montée de façon qu'elle ne tourne pas avec le navire et la seconde conduite de remontée étant montée de façon qu'elle ne tourne pas non plus avec le navire. Cette dernière est souple de sorte que, lorsque le navire tourne, elle se torsade de façon à s'adapter à la rotation du navire.
PCT/GB2002/003761 2001-08-16 2002-08-15 Dispositif de mouillage et de transfert de fluide WO2003016127A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0119975.1 2001-08-16
GB0119975A GB0119975D0 (en) 2001-08-16 2001-08-16 A single point mooring turret without a multi-path swivel

Publications (1)

Publication Number Publication Date
WO2003016127A1 true WO2003016127A1 (fr) 2003-02-27

Family

ID=9920501

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/003761 WO2003016127A1 (fr) 2001-08-16 2002-08-15 Dispositif de mouillage et de transfert de fluide

Country Status (2)

Country Link
GB (1) GB0119975D0 (fr)
WO (1) WO2003016127A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2954267A1 (fr) * 2009-12-23 2011-06-24 Technip France Installation notamment pour la production et le traitement de fluides, du type comprenant une unite flottante, pourvu d'un systeme d'amarrage a point unique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440671A (en) * 1966-04-12 1969-04-29 Robert Smulders Floating device for loading or unloading a ship in open water
GB2204107A (en) * 1987-04-30 1988-11-02 Gec Elliott Mech Handling Turret systems for the mooring of vessels at sea
WO1999038763A1 (fr) * 1998-01-28 1999-08-05 Kværner Oil & Gas A.S Dispositif pour navire de production et de forage a ancrage geostationnaire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440671A (en) * 1966-04-12 1969-04-29 Robert Smulders Floating device for loading or unloading a ship in open water
GB2204107A (en) * 1987-04-30 1988-11-02 Gec Elliott Mech Handling Turret systems for the mooring of vessels at sea
WO1999038763A1 (fr) * 1998-01-28 1999-08-05 Kværner Oil & Gas A.S Dispositif pour navire de production et de forage a ancrage geostationnaire

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2954267A1 (fr) * 2009-12-23 2011-06-24 Technip France Installation notamment pour la production et le traitement de fluides, du type comprenant une unite flottante, pourvu d'un systeme d'amarrage a point unique
WO2011086251A1 (fr) * 2009-12-23 2011-07-21 Technip France Installation notamment pour la production et le traitement de fluides, du type comprenant une unité flottante, pourvu d'un système d'amarrage à point unique
US8770128B2 (en) 2009-12-23 2014-07-08 Technip France Facility in particular for producing and processing fluids, including a floating unit provided with a system for single-point mooring
RU2529114C2 (ru) * 2009-12-23 2014-09-27 Тешнип Франс Устройство для приема и переработки жидкостей, включая плавучий объект, снабженное одноточечной системой постановки на мертвый якорь
KR101552926B1 (ko) 2009-12-23 2015-09-14 테크니프 프랑스 1점 계류 시스템을 갖춘 부유 유닛을 포함하는 유체들을 생산하고 처리하는 설비

Also Published As

Publication number Publication date
GB0119975D0 (en) 2001-10-10

Similar Documents

Publication Publication Date Title
EP2303680B1 (fr) Système d'amarrage par tourelle séparable avec plateau rotatif
EP1796958B1 (fr) Ancrage de navire de haute mer et systeme de chargement de tube goulotte
US7513208B1 (en) Disconnectable mooring system with vessel-mounted tensioning device
US8418639B2 (en) Mooring system for a vessel
WO2010106136A2 (fr) Bouée d'amarrage à tourelle flottante dotée d'un cadre supportant une colonne ascendante mobile
WO2012032163A1 (fr) Système de mouillage détachable comprenant des raccords groupés
US7172479B2 (en) Offshore production system with drilling/workover rig
US6126501A (en) Mooring system for tanker vessels
US6093068A (en) Swivel torque tube arrangement
CN103189272A (zh) 可分离转塔系泊系统
AU720845B2 (en) Keel mounted turret
GB2197927A (en) Underwater oil production
AU2015248999B2 (en) External turret having bogie wheels
WO2003016127A1 (fr) Dispositif de mouillage et de transfert de fluide
EP3414154B1 (fr) Tourelle fine
US20190112007A1 (en) A buoy device
EP0820927A2 (fr) Système d'ancrage
WO2009020400A2 (fr) Système de mouillage pour une installation en mer flottante
GB2484031A (en) A mooring system for a vessel and a method of mooring a vessel
WO2009156751A2 (fr) Amarrage de vaisseaux en haute mer et chargement par tube goulotte

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BY BZ CA CH CN CO CR CU CZ DE DM DZ EC EE ES FI GB GD GE GH HR HU ID IL IN IS JP KE KG KP KR LC LK LR LS LT LU LV MA MD MG MN MW MX MZ NO NZ OM PH PL PT RU SD SE SG SI SK SL TJ TM TN TR TZ UA UG US UZ VN YU ZA ZM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ UG ZM ZW AM AZ BY KG KZ RU TJ TM AT BE BG CH CY CZ DK EE ES FI FR GB GR IE IT LU MC PT SE SK TR BF BJ CF CG CI GA GN GQ GW ML MR NE SN TD TG

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 69(1) EPC (EPO FORM 1205A DATED 24-05-2004)

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP