WO2000044615A1 - Materiel de stockage d'un tuyau de dechargement dans une masse d'eau et procede de transfert du tuyau d'une position de stockage a une position d'utilisation - Google Patents

Materiel de stockage d'un tuyau de dechargement dans une masse d'eau et procede de transfert du tuyau d'une position de stockage a une position d'utilisation Download PDF

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Publication number
WO2000044615A1
WO2000044615A1 PCT/NO2000/000022 NO0000022W WO0044615A1 WO 2000044615 A1 WO2000044615 A1 WO 2000044615A1 NO 0000022 W NO0000022 W NO 0000022W WO 0044615 A1 WO0044615 A1 WO 0044615A1
Authority
WO
WIPO (PCT)
Prior art keywords
hose
handling
buoy
water
loading
Prior art date
Application number
PCT/NO2000/000022
Other languages
English (en)
Inventor
Kåre BREIVIK
Original Assignee
Navion Asa
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 Navion Asa filed Critical Navion Asa
Priority to AU23327/00A priority Critical patent/AU2332700A/en
Publication of WO2000044615A1 publication Critical patent/WO2000044615A1/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 
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C7/00—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects
    • B63C7/26—Means for indicating the location of underwater objects, e.g. sunken vessels

Definitions

  • Equipment for storage of a loading hose in a body of water and method of transferring the hose from a storage position to a position of use
  • the invention relates to an equipment for storage of a loading hose in a body of water, wherein the hose consists of a material with a specific gravity which is less than one. Further, the invention relates to a method of transferring a loading hose from a submerged storage position to a position of use in which the hose forms a load- transferring connection between a loading and an unloading unit, for example two tankers.
  • tanker transport is an alternative to transport via pipe connections.
  • tanker transport Dependent on the location of the field it may be of interest first to transfer the produced oil to a specially constructed shuttle tanker which thereafter brings the load to a place where it is transferred to a conventional barging vessel transporting the load to a receiver. Since a conventional tanker (the barging vessel) has much lower daily rates than a specially constructed shuttle tanker, the transport costs can be reduced significantly if the transport is based on conventional tankers instead of only the use of special ships.
  • loading hoses typically with a diameter of 20 - 24 inches and a length of 250 - 400 meters.
  • the object of the invention is to provide an equipment enabling a safe and lenient underwater storage of a loading hose of the above-mentioned type, and allowing a rational transfer of the hose from the storage position to a position of use and back to the storage position after use.
  • Another object of the invention is to provide a method for rational transfer of such a loading hose from the storage position to its position of use.
  • an equipment which is characterized by the characterizing features according to claim 1. Further, there is provided a method which is characterized by the characterizing features according to claim 6.
  • a loading hose is kept stored in the body of water without the hose coming into contact with the sea or ocean floor. Further, the hose is protected in relation to vessels operating in the area.
  • the equipment and the method may be used on all the relevant water depths.
  • Fig. 1 shows a loading hose which is stored by means of an equipment according to the invention
  • Fig. 2 illustrates shallow water storage of a hose
  • Fig. 3 illustrates deep water storage of a hose
  • Fig. 4 illustrates raising of the hose from its stored position
  • Fig. 5 illustrates transport of the hose
  • Fig. 6 shows a first phase of connection of a hose to a first vessel
  • Fig. 7 shows a later phase of connection of the hose to the first vessel
  • Fig. 8 shows a side view of the hose connected between two vessels
  • Fig. 9 shows a plan view of the situation according to Fig. 8.
  • Figs. 1-3 show a hose 1 which is stored in an underwater position in a body of water 2 by means of an equipment according to the invention.
  • the equipment comprises, inter alia, two coupling means 3 connected to a respective end of the hose 1.
  • Each coupling means comprises a fixing means 4, in the shown embodiment a wire bridle which is fixed to the hose end in question, and a shackle 5 with an appurtenant swivel.
  • the shackle 5 is connected to one or the lower end of a handling line 6, and also to one end of an anchoring wire 7 of which the lower end is connected to an anchor 8 which is adapted to be placed at the sea/ocean floor 9.
  • the other or upper ends of the two handling lines 6 are connected to a common buoy means 10 having a suitable buoyancy to keep afloat at the water surface 11 or at a chosen distance below the surface.
  • the buoy means 10 in the shown embodiment comprises a buoyancy buoy 12 which is connected through a shackle/swivel unit 13 to a marking buoy 14 floating at the water surface, and to which there is fixed a floating line 15.
  • the handling lines 6 are also connected to the buoy 12 through a shackle/swivel unit 16.
  • the anchors 8 fastened at each end of the hose 1 secure that the hose is kept in place.
  • the distance between the anchor points contributes in determining the geometry of the hose under water.
  • the hose In the stored position the hose will be liquid-filled, so that it is not compressed by the water pressure.
  • the hose floats in the body of water, so that it assumes a curved shape upwards in the body of water.
  • the anchoring arrangement will secure that the hose does not come into contact with the bottom. Since there is no physical contact between the hose and the bottom, the hose will be little exposed to damages and abrasion in the periods when it is stored.
  • the marking buoy 14 at the surface of the water shows where the hose is located. Possibly, there may be used a marking buoy at each end of the hose. Each anchor 8 then is connected to its respective marking buoy. This alternative is not shown in the drawings.
  • An alternative to using one or more floating marking buoys may be to use one or more underwater buoys which are released hydro-acoustically. Such an arrangement will additionally secure the equipment in relation to prevailing environmental forces and vessels operating in the area.
  • the distance between the anchors 8 is made relatively large, as shown in Fig. 2.
  • the loading hose will assume a "flatter" geometry, so that the upper part of the hose bight always remains at a safe distance from the surface, considered in relation to movements of surface vessels and the prevailing weather conditions.
  • the anchoring wires 7 are extended, so that the hose floats higher in the body of water (the sea), as shown in Fig. 3. Thereby one may also secure the hose against unacceptably high external pressure.
  • a tender 17 for mobilization and transport of the hose.
  • the loading and unloading units consist of two tankers, more specifically a loading unit in the form of a conventional barging vessel or tanker, and an unloading unit in the form of a shuttle tanker.
  • the buoy means 10 is loosened from the upper ends of the handling lines 6 by means of the tender 17, and is kept thereon. Thereafter, one of the handling lines 6 are used for lifting the hose end in question and the appurtenant anchor 8 up to the surface and on board the tender where the anchor is disconnected and the hose end is released from the tender with the handling line still connected to the hose end, so that the line is towed after the hose.
  • the hose end and the anchor are hoisted by means of a first winch/attachment means 18 on the tender.
  • the other handling line 6 then being fastened to an additional winch/attachment means 18 on the tender, and the hose end in question and the anchor 8 are raised to the surface and on board the tender 17 where the anchor is disconnected.
  • the tender by means of one of the handling lines 6 will tow the hose to the place where a barging or tanker vessel is anchored.
  • a conventional barging tanker 19 is anchored by means of an anchor system 20 in the bow of the vessel.
  • the anchoring system normally will be arranged such that the vessel 19 can turn freely with the bow against the weather.
  • the tender 17 typically will position itself alongside the barging vessel, and a forerunner 21 will be transferred thereto.
  • the forerunner is fixed to the handling line 6 after which the hose has been towed, and the hose thereafter will be winched by means of the handling line onto the deck of the barging vessel 19 and coupled to one of its manifold pipes 22.
  • the loading hose 1 floating alongside the barging vessel 19 is prepared for connection to a DP-operated (dynamically positioned) shuttle tanker 24.
  • the shuttle tanker comes from the field with a load which is to be transferred to the conventional barging tanker. Normally, the shuttle tanker will maintain its position by means of the DP equipment.
  • the loading hose 1 is coupled to the manifold 21 thereof, which normally will be located in the bow portion of the shuttle tanker, as shown in Figs. 8 and 9.
  • the manifold 21 thereof which normally will be located in the bow portion of the shuttle tanker, as shown in Figs. 8 and 9.
  • the emergency towing wire of the barging tanker may be used for this purpose, in combination with a flexible hawser in the extension of the wire.
  • the load is transferred from the shuttle tanker to the barging tanker.
  • the vessels are disconnected from each other, and the hose is brought back to its storage position, the hose handling sequence then being repeated in the opposite order in relation to the above described method steps.
  • the shuttle tanker will return to the field to fetch a new load, whereas the barging tanker will go to the destination of the load.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Pipeline Systems (AREA)

Abstract

L'invention concerne du matériel servant au stockage d'un tuyau de chargement (1) dans une masse d'eau (2), comprenant une paire d'éléments de couplage (3) servant à se raccorder à chacune des extrémités du tuyau (1), une paire de dispositifs d'ancrage (8) reliés aux éléments de raccord (3) et adaptés pour être placés sur le fond marin (9), ainsi qu'une paire de lignes de manipulation (6) reliées chacune à l'un des éléments de couplage (3) par une extrémité et à une même bouée (10) par l'autre extrémité. Cette bouée possède une flottabilité qui lui permet de flotter à la surface de l'eau (11) ou à une certaine distance en dessous de celle-ci. Lorsqu'on utilise ce matériel, les dispositifs d'ancrage (8) se trouvent sur le fond marin (9) à une distance telle l'un de l'autre que le tuyau (1) forme dans l'eau (2) un arc tourné vers le haut en raison de sa flottabilité. L'invention concerne également un procédé permettant de transférer un tuyau de chargement (1) depuis une position de stockage submergée à une position d'utilisation dans laquelle il forme une connexion de transfert de charge telle qu'entre deux bateaux-citernes.
PCT/NO2000/000022 1999-01-28 2000-01-27 Materiel de stockage d'un tuyau de dechargement dans une masse d'eau et procede de transfert du tuyau d'une position de stockage a une position d'utilisation WO2000044615A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU23327/00A AU2332700A (en) 1999-01-28 2000-01-27 Equipment for storage of a loading hose in a body of water, and method of transferring the hose from a storage position to a position of use

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO19990412A NO310346B1 (no) 1999-01-28 1999-01-28 Utrustning for lagring av en lasteslange i en vannmasse, og fremgangsmåte ved overföring av slangen fra lagringsstillingen tilen bruksstilling
NO19990412 1999-01-28

Publications (1)

Publication Number Publication Date
WO2000044615A1 true WO2000044615A1 (fr) 2000-08-03

Family

ID=19902882

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2000/000022 WO2000044615A1 (fr) 1999-01-28 2000-01-27 Materiel de stockage d'un tuyau de dechargement dans une masse d'eau et procede de transfert du tuyau d'une position de stockage a une position d'utilisation

Country Status (3)

Country Link
AU (1) AU2332700A (fr)
NO (1) NO310346B1 (fr)
WO (1) WO2000044615A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO336072B1 (no) * 2012-05-16 2015-05-04 Rolls Royce Marine As Sikringsutstyr for sikring av en slange på et fartøy

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2250253A (en) * 1990-11-22 1992-06-03 Earl & Wright Ltd Mooring arrangement for production loading system
US5944448A (en) * 1996-12-18 1999-08-31 Brovig Offshore Asa Oil field installation with mooring and flowline system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2250253A (en) * 1990-11-22 1992-06-03 Earl & Wright Ltd Mooring arrangement for production loading system
US5944448A (en) * 1996-12-18 1999-08-31 Brovig Offshore Asa Oil field installation with mooring and flowline system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO336072B1 (no) * 2012-05-16 2015-05-04 Rolls Royce Marine As Sikringsutstyr for sikring av en slange på et fartøy

Also Published As

Publication number Publication date
NO990412D0 (no) 1999-01-28
NO990412L (no) 2000-07-31
NO310346B1 (no) 2001-06-25
AU2332700A (en) 2000-08-18

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