WO1994004412A1 - Dispositif de fermeture pour une ouverture menagee dans le fond d'un bateau - Google Patents

Dispositif de fermeture pour une ouverture menagee dans le fond d'un bateau Download PDF

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Publication number
WO1994004412A1
WO1994004412A1 PCT/NO1993/000127 NO9300127W WO9404412A1 WO 1994004412 A1 WO1994004412 A1 WO 1994004412A1 NO 9300127 W NO9300127 W NO 9300127W WO 9404412 A1 WO9404412 A1 WO 9404412A1
Authority
WO
WIPO (PCT)
Prior art keywords
shutter
elements
shutter elements
receiving space
free end
Prior art date
Application number
PCT/NO1993/000127
Other languages
English (en)
Inventor
Kåre BREIVIK
Arne Smedal
Kåre SYVERTSEN
Original Assignee
Den Norske Stats Oljeselskap A.S.
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 Den Norske Stats Oljeselskap A.S. filed Critical Den Norske Stats Oljeselskap A.S.
Priority to AU49854/93A priority Critical patent/AU4985493A/en
Publication of WO1994004412A1 publication Critical patent/WO1994004412A1/fr

Links

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
    • B63B21/508—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets connected to submerged buoy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/04—Fixations or other anchoring arrangements

Definitions

  • the invention relates to a device for closing a
  • a vessel which is provided with a receiving space for 0 the above-mentioned purpose, for use in connection with a loading/unloading system for the transfer of e.g. oil or gas from a pipeline via a loading/unloading buoy, for example is known from the international patent application No. PCT/NO92/00055.
  • the s receiving space which is arranged in the bow portion of the vessel, is open at its lower end, and at its upper end it passes into a vertical shaft which may be closed at its lower end by means of a shutter.
  • This shutter is advantageous in order to be able to shut off the shaft against the surrounding sea water and o drain it for possible maintenance purposes when the vessel is not moored to the loading/unloading buoy.
  • the shutter must be able to resist the normal water pressure as well as the maximum so-called “slamming pressures" which may be expected in heavy sea when the bottom of the vessel at the bow portion strikes against 5 the water surface after having been raised thereabove. Without such a lower shutter in the shaft, i.a. substantial braking actions will be able to arise because of the fact that the water level within the shaft will be raised and lowered so that water flows out and in through the opening at the bottom of the o receiving space.
  • the receiving space is open at its lower end implies in itself a certain braking action as a result of turbulence with movement of the vessel. In practice, this braking action will result in a reduction of the cruising speed of the 5 vessel of e.g. the order of 0,5 knots on the average.
  • the main objective of the invention is to provide a device which, firstly, will eliminate or reduce said braking action, and secondly will prevent foreign bodies from penetrating into the receiving space of the vessel.
  • a further objective of the invention is to see to it that the guiding of the buoy during the pulling-up thereof towards and into the receiving space may start as early as possible.
  • a device of the introductorily stated type which, according to the invention, is characterized by an at least bipartite shutter means at the lower end of the receiving space and comprising shutter elements which are rotatably fastened to the bottom of the vessel and have a free end having a central retracted edge portion and a transver ⁇ sely extending edge portion on each side thereof, the two transverse edge portions of the free end being arranged to cause closing by mutual cooperation with at least one corresponding edge portion on at least one other shutter element, and the central edge portion forming a part of a side wall in a central guide opening in the shutter means when the free end of the shutter element in the closing is moved towards the corresponding free end of the other shutter element or remaining shutter elements of the shutter means.
  • FIG. 1 shows a sectional side view of an embodiment of the closing device of the invention
  • Fig. 2 shows a plan view of the same embodiment along the line II-II in Fig. 1:
  • Fig. 3 shows a sectional side view of the closing device in partly open position to make room for a buoy which is pulled up into the receiving space;
  • Fig. 4 corresponds to Fig. 3, but shows the situation wherein the buoy is in place and connected, and wherein the shutter elements of the closing device are completely turned-up;
  • Fig. 5 shows a perspective view of one of the shutter elements of the device;
  • Fig. 6 shows an embodiment wherein the shutter elements have flaps which may be turned up.
  • Fig. 1 there is shown a section of a vessel 1, especially a tanker, wherein a receiving space 3 is built into the vessel, the receiving space having a conical shape and is enlarged downwards towards the bottom 5 of the vessel 1, for receipt of a loading/unloading buoy (first shown in Fig. 3).
  • the main component of the device is a shutter means 2 in two-winged design, and each wing comprises one shutter element 4 which may be turned from a horizontal, closing position and up to a turned-up position wherein the shutter element is located outside the conical contour of the receiving space 3.
  • the underside of the shutter elements 4 are approximately flush with the underside of the bottom 5 of the vessel, and the free ends 6 of the shutter elements in this position are moved together in abutting contact or, as suggested in the Figure, with some overlap, so that the closing takes place in a closing plane 7.
  • the elements At the rear of the shutter elements 4, i.e. at the side which is opposite to the free end 6, the elements have an oblique surface 8a which is adapted to rest against the_lower abutment surface 8b of the receiving space 3 for the buoy.
  • FIG. 1 shows that the receiving space 3 at the top passes into a vertical shaft 9 which, at its lower end, has a space for connection of the buoy to the pipe system of the vessel for fluid transfer, here indicated by an inwards-turnable coupling unit 25.
  • the shaft 9 is air-tightly shut-off from the surrounding water by means of a shutter 26.
  • the device according to the invention especially is intended for use on vessels for operation in connection with a buoy of the type disclosed in e.g. the international patent application No. PCT/NO92/00056 and in Norwegian patent appli ⁇ cation No. 921704. Reference is made to these applications for a further description of such a buoy.
  • a buoy of the current type When a buoy of the current type is to be pulled up into the receiving space and connected, as indicated in Figs. 3 and 4, it is advantageous to have a centering for safe introduction of the buoy into the receiving space.
  • this takes place in that the pick-up line which is fastened to the upper part of the buoy, at the bottom branches off and forms a so-called lifting bridle having several lines, e.g. in a number of two or three.
  • a lowerable guide cylinder 11 of the type disclosed in Norwegian patent application No. 922950, in Fig. 1 is indicated in a somewhat lowered position to take care of the centering function within the receiving space 3.
  • the guiding of the lifting bridle may take place as shown by means of guide rollers 27 which may be arranged in an approximately continuous internal ring at the lower end of the guide cylinder 11, or separate rollers may be placed in a triangle, a square or other configuration to ensure that the lines of the lifting bridle slide against a roller irrespective of the angular position of the buoy and irrespective of the number of lines included in the lifting bridle.
  • the closing device of the invention In addition to its main function, namely to effect a substantial closing of the bottom opening of the vessel into the receiving space 3, the closing device of the invention also has an additional function, namely to provide for an earliest possible centering and guiding of the lifting bridle of the pick ⁇ up line during the pulling-up of a buoy, while the closing device is still closed.
  • the guiding and centering function is taken care of in that the shutter elements 4 of the device do not close completely in the central area, but have recesses so that, in the closed position, they form a central guide opening 10 in the closing plane 7.
  • the opening is oval, as appears from Fig. 2. From Fig.
  • the free end 6 of the shutter elements 4 has a central retracted edge portion 14 forming a part of a side wall 16 of the opening 10, and a transverse edge portion 12 on each side of the recess. It is along the outer edge portions 12 that the lower opening of the receiving space 3 is closed.
  • the outer sides of the shutter elements 4 are formed by planar side surfaces 13 so that, in the closed position of the device, there will be left a relatively narrow, uncovered sector on each side of the lower circular opening of the receiving space, said sectors, in the illustrated embodiment having a two-winged shutter means 2 located diametri- cally opposite to each other.
  • each of the shutter elements 4 may be operated by hydraulic actuators 15 acting on an arm 17 the swinging range of which is suggested by a dot-and- dash curve on each side of the Figure.
  • the shutter elements consist of a main part 19 having a certain thickness to prefer ⁇ ably form a flushing transition from both sides of the bottom 5 and forwards to the edge portions 12, 14 of the free ends 6 of the shutter elements.
  • the main part is constructed
  • the oblique rear surface 8a of the shutter elements 4 may be planar or somewhat curved outwards at o the bottom dependent on how the profile of the receiving space 3 is shaped at the bottom 5 of the vessel.
  • the assembly of the shutter elements 4 to the bottom of the vessel takes place by means of over-lying fastening arms 18 extending rearwardly from the free end 6 of the shutter elements and past their rear edge s 20.
  • each fastening arm 18 is fixed to a horizontal shaft 21 the axis of rotation 22 of which is located in a plane at a certain distance above the closing plane 7.
  • the main part 19 of the shutter elements may be turned up from its closed position and clear the abutment o surface 8b of the bottom.
  • the hydraulic system which is connected to the shutter elements does not need to be in operation when the elements are in the closed position, and these may be allowed of some movement upwards from the closing plane. Alternatively, they may be kept permanently down in the closing plane during 5 force influence from the hydraulic system, or they may be locked in the closing position by means of a separate locking device.
  • fenders e.g. of wood, o rubber, brass or another appropriate material.
  • Fig. 3 shows the pulling-up of a loading/unloading buoy 32 having an upper and a lower conical member 35 and 36, respectively.
  • the buoy is moored by means of suggested mooring lines 29 which are fastened to a reinforced portion 34 at the 5 underside of the buoy.
  • the Figure shows the uppermost part of the buoy sectioned in order to suggest a coupling element 37 for connection to the pipe system of the vessel.
  • the buoy is hoisted up by means of a pick-up line 30 which, at the bottom, branches off to a lifting bridle having fastening lines 31.
  • the shutter elements 4 are turned up so much as to clear the buoy, the turning-up taking place by means of the hydraulic actuators 15 (Fig. 1).
  • FIG. 4 shows the situation after the buoy 32 has been moved completely into the receiving space and locked in place with a locking mechanism having locking dogs 38, and where the buoy further is connected to the pipe system and tank arrangement of the vessel by means of the inwards turnable coupling unit 25.
  • the lower conical member 36 of the buoy at the top and bottom rests against conical abutment surfaces in the receiving space, namely the lower abutment surface 8b and an upper abutment surface 33.
  • the upper abutment surface 33 is not continuous around the circumference, so that the free end 6 of each of the shutter elements 4 may be moved into a suitable recess.
  • the length of the shutter elements may be shorter, so that the free end may swing in at the underside of the abutment surface 33.
  • Fig. 5 shows a perspective view of a shutter element 4 having three fastening arms 18 and planar side surfaces 13. Guide elements in the form of rollers 23 are suggested on each side of the central edge portion 14 to prevent the lines 31 of the lifting bridle from forcing themselves in between the transverse edge portions 12 when the buoy is centred by the opening 10 formed between two or more shutter elements 4 resting against each other.
  • the main part 19 of the shutter element has its oblique rear surface 8a somewhat curved outwards at the bottom towards the rear edge 20, in order to match a rounded lower portion of the corresponding abutment surface 8b lowest in the bottom 5 of the vessel.
  • Fig. 6 shows an embodiment of the shutter element 4 wherein the free end 6 has a flap 24 mounted thereon along each of the transverse edge portions 12.
  • the flaps 24 may correspond to the flaps of an aircraft wing and may be turned up relative to the main part 19 of the shutter element 4 by means of a separate, e.g., hydraulic mechanism which may comprise a pivotable guide cylinder at the side of the shutter element.
  • the flap may be arranged in the central edge portion 14 to close the guide opening 10 when no line is to be carried through the shutter means and the receiving space.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Closures For Containers (AREA)

Abstract

L'invention se rapporte à un dispositif pour fermer un espace récepteur ouvert vers le bas (3) dans le fond d'un bateau (1), notamment un espace destiné à recevoir une bouée immergée pour le transfert d'hydrocarbures liquides, la bouée étant remontée au moyen d'une ligne passant à travers l'espace récepteur (3). Un tel dispositif comporte à l'extrémité inférieure de l'espace récepteur (3) au moins un organe d'obturation bipartite (2), constitué par des éléments obturateurs (4) qui sont fixés rotatifs contre le fond (5) du bateau (1) et présentent une extrémité libre (6) ayant une partie de bord rétractée centrale (14) et une partie de bord transversale (12). Les deux parties de bord transversales (12) de l'extrémité libre (6) sont disposées de façon à produire une fermeture par coopération mutuelle avec au moins une partie de bord correspondante sur au moins l'un des autres éléments obturateurs, et la partie de bord rétractée centrale (14) forme une partie d'une paroi latérale (16) dans une ouverture de guidage centrale (10) se trouvant dans l'organe d'obturation (2), lorsque l'extrémité libre (6) de l'élément obturateur (4) est, pendant la fermeture, déplacée en direction de l'extrémité libre correspondante de l'autre élément obturateur (4) ou des autres éléments obturateurs restants de l'organe d'obturation (2).
PCT/NO1993/000127 1992-08-21 1993-08-20 Dispositif de fermeture pour une ouverture menagee dans le fond d'un bateau WO1994004412A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU49854/93A AU4985493A (en) 1992-08-21 1993-08-20 A closing device for an opening in the bottom of a vessel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO923281 1992-08-21
NO923281A NO923281L (no) 1992-08-21 1992-08-21 Lukkeinnretning for en aapning i bunnen av et fartoey

Publications (1)

Publication Number Publication Date
WO1994004412A1 true WO1994004412A1 (fr) 1994-03-03

Family

ID=19895388

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1993/000127 WO1994004412A1 (fr) 1992-08-21 1993-08-20 Dispositif de fermeture pour une ouverture menagee dans le fond d'un bateau

Country Status (3)

Country Link
AU (1) AU4985493A (fr)
NO (1) NO923281L (fr)
WO (1) WO1994004412A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997018987A1 (fr) * 1995-11-17 1997-05-29 Hydralift Asa Ecoutille soulevable de pont de forage/de moonpool
US7347156B2 (en) * 2003-04-23 2008-03-25 Sofec, Inc. Lower bearing assembly for disconnectable turret
EP2139754A1 (fr) * 2007-03-21 2010-01-06 Sevan Marine Asa Plateforme flottante pour des opérations dans des régions exposées à des conditions climatiques extrêmes
WO2010032044A2 (fr) * 2008-09-22 2010-03-25 Sigma Offshore Limited Ensemble de verrouillage d'élément d’ancrage
US8118632B2 (en) * 2005-11-29 2012-02-21 Bluewater Energy Services, B.V. Tanker loading assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160166A (en) * 1984-06-11 1985-12-18 Exxon Production Research Co Vessel mooring system
WO1987005876A1 (fr) * 1986-03-24 1987-10-08 Svensen Niels Alf Systeme de transfert et d'amarrage de bouees sous-marines pour la production au large de petrole et de gaz
EP0396391A1 (fr) * 1989-05-02 1990-11-07 Foster Wheeler Energy Limited Transfert de fluides en mer et precodure pour son realisation
WO1993011032A1 (fr) * 1991-11-27 1993-06-10 Den Norske Stats Oljeselskap A.S. Dispositif situe dans un navire et servant au chargement et au dechargement d'un milieu liquide en mer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160166A (en) * 1984-06-11 1985-12-18 Exxon Production Research Co Vessel mooring system
WO1987005876A1 (fr) * 1986-03-24 1987-10-08 Svensen Niels Alf Systeme de transfert et d'amarrage de bouees sous-marines pour la production au large de petrole et de gaz
EP0396391A1 (fr) * 1989-05-02 1990-11-07 Foster Wheeler Energy Limited Transfert de fluides en mer et precodure pour son realisation
WO1993011032A1 (fr) * 1991-11-27 1993-06-10 Den Norske Stats Oljeselskap A.S. Dispositif situe dans un navire et servant au chargement et au dechargement d'un milieu liquide en mer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997018987A1 (fr) * 1995-11-17 1997-05-29 Hydralift Asa Ecoutille soulevable de pont de forage/de moonpool
US7347156B2 (en) * 2003-04-23 2008-03-25 Sofec, Inc. Lower bearing assembly for disconnectable turret
US8118632B2 (en) * 2005-11-29 2012-02-21 Bluewater Energy Services, B.V. Tanker loading assembly
EP2139754A1 (fr) * 2007-03-21 2010-01-06 Sevan Marine Asa Plateforme flottante pour des opérations dans des régions exposées à des conditions climatiques extrêmes
EP2139754A4 (fr) * 2007-03-21 2012-12-12 Sevan Marine Asa Plateforme flottante pour des opérations dans des régions exposées à des conditions climatiques extrêmes
WO2010032044A2 (fr) * 2008-09-22 2010-03-25 Sigma Offshore Limited Ensemble de verrouillage d'élément d’ancrage
WO2010032044A3 (fr) * 2008-09-22 2010-06-24 Sigma Offshore Limited Ensemble de verrouillage d'élément d’ancrage

Also Published As

Publication number Publication date
NO923281D0 (no) 1992-08-21
NO923281L (no) 1994-02-22
AU4985493A (en) 1994-03-15

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