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EP0960810A1 - Système de tuyauterie de transfert - Google Patents

Système de tuyauterie de transfert Download PDF

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Publication number
EP0960810A1
EP0960810A1 EP98201805A EP98201805A EP0960810A1 EP 0960810 A1 EP0960810 A1 EP 0960810A1 EP 98201805 A EP98201805 A EP 98201805A EP 98201805 A EP98201805 A EP 98201805A EP 0960810 A1 EP0960810 A1 EP 0960810A1
Authority
EP
European Patent Office
Prior art keywords
duct
transfer system
duct section
sections
section
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.)
Withdrawn
Application number
EP98201805A
Other languages
German (de)
English (en)
Inventor
Jack Pollack
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Single Buoy Moorings Inc
Original Assignee
Single Buoy Moorings Inc
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 Single Buoy Moorings Inc filed Critical Single Buoy Moorings Inc
Priority to EP98201805A priority Critical patent/EP0960810A1/fr
Priority to US09/701,351 priority patent/US6394154B1/en
Priority to EP99926505A priority patent/EP1080007B1/fr
Priority to PCT/EP1999/003818 priority patent/WO1999062762A1/fr
Priority to BR9910823-2A priority patent/BR9910823A/pt
Priority to AU43730/99A priority patent/AU4373099A/en
Priority to IDW20002486A priority patent/ID27827A/id
Publication of EP0960810A1 publication Critical patent/EP0960810A1/fr
Priority to NO20006052A priority patent/NO322123B1/no
Withdrawn legal-status Critical Current

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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 
    • 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 
    • B63B22/00—Buoys
    • B63B22/02—Buoys specially adapted for mooring a vessel
    • B63B22/021—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids
    • B63B22/025—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids and comprising a restoring force in the mooring connection provided by means of weight, float or spring devices
    • 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 a transfer system for transfer of fluids from a first floating or fixed structure to a second floating structure, the transfer system comprising a first and second duct section connected to the first and second structures respectively, and a substantially horizontal, submerged, third duct section interconnecting the first and second duct sections.
  • One floating structure may be a production or storage structure such as a spar buoy, a semi-submersible structure, a fixed tower or a mooring buoy whereas the second structure may comprise a floating production storage and offloading vessel (FPSO), a shuttle tanker and the like.
  • FPSO floating production storage and offloading vessel
  • a production platform is anchored to the seabed via radial taut mooring lines, the platform being connected to a subsea well head via a riser.
  • the production platform is connected to a mooring buoy via flexible duct sections.
  • the duct sections are anchored to the seabed via tethers.
  • the mooring buoy is connected to the seabed via a cable carrying at the end thereof a clump weight.
  • the clump weight is anchored to the seabed via an anchor chain.
  • the mooring buoy can freely drift within an area that is defined by the length of the anchor chain between the clump weight and the sea bed.
  • the tanker that is moored to the buoy can weathervane around the buoy and is subject to drift in accordance with prevailing wind and current conditions.
  • the known system has as a disadvantage that the duct sections may be subjected to bending/kinking or buckling due to currents which may displace the system sideways.
  • the influence of the floating system dynamics on the transfer ducts is limited but the system is relatively complex in view of the additional mooring buoy being required.
  • the freedom of movement of the tanker there is a risk of the tanker damaging the transfer pipes.
  • the transfer system is characterised in that at least one of the first and second duct sections is oriented in a substantially vertical position and being inclined at a predetermined angle with respect to the vertical, a tensioning weight being connected to the transfer system at or near the connecting point of the inclined duct section and the substantially horizontal third duct section for providing a tensioning force on the third duct section.
  • the ballast weight exerts a horizontal component on the substantially horizontal third duct section.
  • the system according to the present invention does not require additional mooring constructions and allows to use relatively long, substantially horizontal duct section, having a length of for instance 3000 metres.
  • substantially horizontal it is meant that the third duct section does not make a larger angle with the horizontal than at most 45°.
  • both first and second duct sections are inclined with respect to the vertical, a tensioning weight being provided at or near each connecting point of the first and second duct sections with the third duct section.
  • the first and second duct sections are attached to the third duct section via an articulation joint, such as for instance a flex joint or a pivoting joint.
  • the duct sections are made of hard pipe which allows for a relatively economic manufacture. The use of hard pipe in this case is possible as the bending and buckling in the present system is reduced due to the tensioning effect of the weights.
  • the system of the present invention may be used in relatively large water depths such as 100-150 metres below sea level and deeper. It is possible to use however a combination of hard and flexible duct sections.
  • Multiple transfer systems of the present invention may extend in a radial manner from a single floating structure, such as the spar buoy, to respective FPSO-tankers or buoys for export.
  • the buoyancy of the tensioning weights may be adjustable for instance by ballasting the counter weights with water or deballasting using compressed air. Additional weight could also be added or removed.
  • the third duct section may be provided with buoyancy such as to have a neutral or even positive buoyancy in water.
  • Figure 1 shows a mid-depth transfer system 1 according to the present invention connecting a spar buoy 2 to a floating production storage and offloading (FPSO) vessel 3.
  • FPSO floating production storage and offloading
  • the spar buoy 2 is anchored to the seabed 4 via anchor lines 5.
  • One or more risers 6 connect the spar body to a subsea hydrocarbon well.
  • the vessel 3 comprises a geostationary turret 7.
  • the turret 7 is via a chain table, which extends near keel level of the vessel 3, connected to the seabed 4 via mooring lines 8.
  • the vessel 3 can weathervane around the turret 7.
  • one or more pipes 9 extend, for instance via a guide 10 at the outer perimeter of the spar body, to an inclined duct section 11.
  • the inclined duct section 11 is connected to a horizontal duct section 12 which at its other end is connected to a second inclined duct section 13.
  • the inclined duct section 13 is connected to the turret 7 of the vessel 3.
  • the inclined duct sections 11,13 are connected to the spar buoy 2 and the vessel 3 respectively via flexible joints 21,22.
  • the horizontal duct section 12 is connected to the inclined duct sections 11,13 via pivot joints or flexible joints 14,15. At or near the joints 14,15 tensioning weights 16,17 are attached via cables 18,19.
  • the tensioning force exerted by each weight 16,17 is proportional to sin ⁇ , wherein a equals the angle of inclination of the substantial vertical duct sections 11,13.
  • a equals the angle of inclination of the substantial vertical duct sections 11,13.
  • the angles a of the duct sections 11,13 are equal, this is not necessary and different inclinations may be used when differing weights 16,17 are used.
  • the duct section 12 is exactly horizontal but it may be offset from the horizontal.
  • the horizontal duct section 12 may be located from a few metres, up to 150 metres or more below sea level 20.
  • the angle of inclination ⁇ may for instance be about 30°.
  • the height H 1 between the flexible joints 21,22 and the attachment point of the weights may be for instance 115 metres.
  • the horizontal distance between the flexible joints 21,22 may be about 2173 metres whereas the length of the horizontal duct section 12 may be about 2000 metres.
  • the length of each inclined duct section 11,13 is about 173 metres.
  • the weight of each tensioning weight 16,17 can be for instance 100 t.
  • the diameter of the ducts 11,12 and 13 may be for hard pipe for instance 0,5 metre.
  • an additional articulated pivot or flex joint 20,21 may be installed perhaps 10 to 100 m from the flexible joints 14,15.
  • the horizontal duct section 12 Due to a sideways current in the direction of the arrow c, as shown in figure 3, the horizontal duct section 12 is somewhat displaced and the distance L between the two tensioning weights 16,17 is decreased compared to the distance L in the absence of a current, which has been indicated with the dashed lines in figure 3.
  • the horizontal duct section 12 will assume a curved or bend shape.
  • the distance L of the section 12 can for instance be between 1000 and 10.000 metres.
  • the tensioning weights 16,17 exert a tensional force on the horizontal duct section 12, the amount of buckling remains limited. Furthermore, the excursion of the horizontal duct section from its straight position will be limited due to the additional tensional restoring force of the tensioning weights 16,17 when they are placed in their offset position, as shown in figure 3.
  • the amount of sideways deflection B may be about 300 metres at a sideways current of about 1 m/s. In this case the angle of inclination ⁇ will increase from 30° to about 35°.
  • the horizontal tensioning forces in the horizontal duct section 12 amount to about 52 tons whereas the vertically directed component of the tensioning weight 16,17 amounts to about 31 t.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
EP98201805A 1998-05-29 1998-05-29 Système de tuyauterie de transfert Withdrawn EP0960810A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP98201805A EP0960810A1 (fr) 1998-05-29 1998-05-29 Système de tuyauterie de transfert
US09/701,351 US6394154B1 (en) 1998-05-29 1999-05-31 Transfer pipe system
EP99926505A EP1080007B1 (fr) 1998-05-29 1999-05-31 Systeme de transfert par canalisations
PCT/EP1999/003818 WO1999062762A1 (fr) 1998-05-29 1999-05-31 Systeme de transfert par canalisations
BR9910823-2A BR9910823A (pt) 1998-05-29 1999-05-31 Sistema de transferência para transferência de fluidos de uma primeira estrutura fixa ou flutuante para uma segunda estrutura flutuante
AU43730/99A AU4373099A (en) 1998-05-29 1999-05-31 Transfer pipe system
IDW20002486A ID27827A (id) 1998-05-29 1999-05-31 Sistem pipa transfer
NO20006052A NO322123B1 (no) 1998-05-29 2000-11-29 Roroverforingssystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98201805A EP0960810A1 (fr) 1998-05-29 1998-05-29 Système de tuyauterie de transfert

Publications (1)

Publication Number Publication Date
EP0960810A1 true EP0960810A1 (fr) 1999-12-01

Family

ID=8233775

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98201805A Withdrawn EP0960810A1 (fr) 1998-05-29 1998-05-29 Système de tuyauterie de transfert

Country Status (1)

Country Link
EP (1) EP0960810A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003049994A1 (fr) 2001-12-12 2003-06-19 Single Buoy Moorings Inc. Systeme de debarquement de gnl au mouillage
CN110260038A (zh) * 2019-07-01 2019-09-20 中国石油工程建设有限公司 一种陆上埋地管道上浮屈曲临时治理系统及方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1327330A (fr) * 1962-05-04 1963-05-17 Exxon Research Engineering Co Installation pour l'amarrage et le chargement des navires au large
FR2159703A5 (fr) * 1971-11-09 1973-06-22 Emh
US4339002A (en) * 1979-08-09 1982-07-13 Halliburton Company Sea buoy discharge manifold system
EP0135445A1 (fr) * 1983-09-14 1985-03-27 Entreprise D'equipements Mecaniques Et Hydrauliques (E.M.H.) Système d'amarrage d'un corps flottant de grandes dimensions notamment en mer
US4530302A (en) * 1983-03-25 1985-07-23 Sofec, Inc. Submerged single point mooring apparatus
NL8701849A (nl) 1987-08-05 1989-03-01 Bluewater Terminal Systems Nv Stelsel voor het verbinden van een drijvend lichaam, bijvoorbeeld een schip, met een zich op de zeebodem bevindende bron.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1327330A (fr) * 1962-05-04 1963-05-17 Exxon Research Engineering Co Installation pour l'amarrage et le chargement des navires au large
FR2159703A5 (fr) * 1971-11-09 1973-06-22 Emh
US4339002A (en) * 1979-08-09 1982-07-13 Halliburton Company Sea buoy discharge manifold system
US4530302A (en) * 1983-03-25 1985-07-23 Sofec, Inc. Submerged single point mooring apparatus
EP0135445A1 (fr) * 1983-09-14 1985-03-27 Entreprise D'equipements Mecaniques Et Hydrauliques (E.M.H.) Système d'amarrage d'un corps flottant de grandes dimensions notamment en mer
NL8701849A (nl) 1987-08-05 1989-03-01 Bluewater Terminal Systems Nv Stelsel voor het verbinden van een drijvend lichaam, bijvoorbeeld een schip, met een zich op de zeebodem bevindende bron.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003049994A1 (fr) 2001-12-12 2003-06-19 Single Buoy Moorings Inc. Systeme de debarquement de gnl au mouillage
CN110260038A (zh) * 2019-07-01 2019-09-20 中国石油工程建设有限公司 一种陆上埋地管道上浮屈曲临时治理系统及方法
CN110260038B (zh) * 2019-07-01 2024-01-26 中国石油工程建设有限公司 一种陆上埋地管道上浮屈曲临时治理系统及方法

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