WO2008051090A1 - Mooring system for a loading station - Google Patents

Mooring system for a loading station Download PDF

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Publication number
WO2008051090A1
WO2008051090A1 PCT/NO2007/000378 NO2007000378W WO2008051090A1 WO 2008051090 A1 WO2008051090 A1 WO 2008051090A1 NO 2007000378 W NO2007000378 W NO 2007000378W WO 2008051090 A1 WO2008051090 A1 WO 2008051090A1
Authority
WO
WIPO (PCT)
Prior art keywords
loading station
mooring system
loading
vessel
seabed
Prior art date
Application number
PCT/NO2007/000378
Other languages
French (fr)
Inventor
Fredrik Major
Original Assignee
Sevan Marine 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 Sevan Marine Asa filed Critical Sevan Marine Asa
Priority to BRPI0717351-2A2A priority Critical patent/BRPI0717351A2/en
Priority to EP07834786A priority patent/EP2084053A4/en
Priority to US12/444,660 priority patent/US20100034594A1/en
Publication of WO2008051090A1 publication Critical patent/WO2008051090A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/01—Risers
    • E21B17/015—Non-vertical risers, e.g. articulated or catenary-type
    • 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
    • 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 present invention relates to a mooring system for a loading station, i.e. a moorings system for a loading station which can be positioned in a safe distance from a production platform/-vessel according the claim preamble.
  • DP Dynamic Positioning
  • bow load equipment for load transfer to/from a fixed or floating platform/vessel is traditionally done via a loading station comprising a hawser connecting the tanker to the platform.
  • Transfer of load takes place through a hose brought from the platform to the bow manifold of the ship.
  • the tanker is kept in normal position by means of its DP.
  • An interrupted loading operation can easily entail one or several days delay, of which can be very costly for a conveyor, but also for supplier due to tight delivery conditions. Further, it may also be risky for a vessel to operate near fixed or floating platforms/ship.
  • figure 1 shows the mooring system for the loading station according to the invention in a standby position before a tanker is connected
  • figure 2 shows the same mooring system when the loading station is connected to a tanker.
  • the system comprises a flexible conduit 1 or a fixed conduit 2 to the platform/ship.
  • the flexible conduit 1 will usually be directed through the sea, but can also be directed on the seabed, whereas the fixed conduit 2 will be directed via the seabed.
  • the last part of the pipeline will be a flexible conduit 2 arranged in a wave configuration.
  • the loading station 4 At the end of the wave configuration the loading station 4 will be provided. From the loading station a pick-up-arrangement 11 is fastened and it will be floating on the surface.
  • the flexible conduit 3 which has a wave configuration, will be moored in a lower point 9 in the wave configuration by means of one anchor 5 and at least one weight 6. The entire system, except the pick-up- arrangement 11, is under the surface.
  • the loading station 4 comprises a swivel pipe-end-piece 7 as well as a buoyancy element 8 which provide a positive buoyancy for the part of the flexible conduit 3 which are located after the buoyancy element 10, as well as for the swivel pipe-end-piece 7.
  • a point 9 on this part of the flexible conduit 3 there is by means of at least one line (13) connected an anchor 3 and a weight 6 which will rest on the seabead when the loading station 4 is not connected to a tanker.
  • the line 13 can comprise of a wire, chain and/or a polyester rope.
  • the weight 6 When the system is not connected to a tanker 12 the weight 6 will compensate for the positive buoyancy of the buoyancy element 8 and the weight 6 will drop to the bottom and place the loading station 4 at a suitable depth under water with an pick-up-arrangement 11 floating on the surface.
  • the purpose of the at least one anchor is to ensure the loading station 4 will be kept at approximately the same position compared to the platform or vessel independent of wind- and/or current direction.
  • a tanker 12 When a tanker 12 arrive to be connected to the system in order to load to/from the platform/vessel, it will after positioning itself with the bow in correct position to the loading station 4, first pick up the pick-up-arrangement 11 and then pull inn the loading station 4 until the swivel pipe-end-piece 7 can be connected to the bow manifold 12 of the vessel and the loading/unloading can start. When the loading station 4 is pulled up, the weight 6 will be lifted from the bottom and "hover" freely until the loading station 4 is lowered into the water after the completion of the loading operation.
  • the tanker will, if the wind and/or the current should change, by means of its dynamic positioning system, rotates around the loading station 4 without this creating an immediate risk for the production platform/-vessel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Ship Loading And Unloading (AREA)

Abstract

Mooring system for a loading station, i.e. a mooring system for a loading station which can be located in a safe distance from a production platform/vessel, where a conventional tanker with dynamic positioning and bow loading equipment can be connected for loading/unloading from a stationary floating platform/vessel, where a loading station (4) is connected to a flexible conduit (3) anchored to the seabed in a point (9) by at least one line (13) to at least one anchor (5) and at least one weight (6) resting on the seabed.

Description

Mooring system for a loading station
The present invention relates to a mooring system for a loading station, i.e. a moorings system for a loading station which can be positioned in a safe distance from a production platform/-vessel according the claim preamble.
Mooring of conventional tankers by Dynamic Positioning (DP) and bow load equipment for load transfer to/from a fixed or floating platform/vessel is traditionally done via a loading station comprising a hawser connecting the tanker to the platform.
Transfer of load takes place through a hose brought from the platform to the bow manifold of the ship. The tanker is kept in normal position by means of its DP.
If a change of the direction of wind and/or current takes place, this can result in a loading operation being interrupt. An interrupted loading operation can easily entail one or several days delay, of which can be very costly for a conveyor, but also for supplier due to tight delivery conditions. Further, it may also be risky for a vessel to operate near fixed or floating platforms/ship.
It is therefore an object of the present invention to provide a mooring system for a loading station which is positioned in a safe distance from a production platform/ship and which will reduce the risk and the need for interruption of the loading. This is achieved by the loading system according to the present invention, such as defined by the features of the appended claims.
The invention will be described further in connection with an embodiment and with reference to the drawings, in which figure 1 shows the mooring system for the loading station according to the invention in a standby position before a tanker is connected, and figure 2 shows the same mooring system when the loading station is connected to a tanker.
Under reference to figures 1 and 2, the system comprises a flexible conduit 1 or a fixed conduit 2 to the platform/ship. The flexible conduit 1 will usually be directed through the sea, but can also be directed on the seabed, whereas the fixed conduit 2 will be directed via the seabed. The last part of the pipeline will be a flexible conduit 2 arranged in a wave configuration. At the end of the wave configuration the loading station 4 will be provided. From the loading station a pick-up-arrangement 11 is fastened and it will be floating on the surface. The flexible conduit 3 which has a wave configuration, will be moored in a lower point 9 in the wave configuration by means of one anchor 5 and at least one weight 6. The entire system, except the pick-up- arrangement 11, is under the surface.
In order to obtain a S-formed wave form for the flexible conduit 3, it is necessary to place some buoyancy elements 10 along some part of the conduit in order to create a positive buoyancy for the entire, flexible conduit 3. The last part of the S- form will be provided by the loading station which has a positive buoyancy.
The loading station 4 comprises a swivel pipe-end-piece 7 as well as a buoyancy element 8 which provide a positive buoyancy for the part of the flexible conduit 3 which are located after the buoyancy element 10, as well as for the swivel pipe-end-piece 7. At a point 9 on this part of the flexible conduit 3, there is by means of at least one line (13) connected an anchor 3 and a weight 6 which will rest on the seabead when the loading station 4 is not connected to a tanker. The line 13 can comprise of a wire, chain and/or a polyester rope. When the system is not connected to a tanker 12 the weight 6 will compensate for the positive buoyancy of the buoyancy element 8 and the weight 6 will drop to the bottom and place the loading station 4 at a suitable depth under water with an pick-up-arrangement 11 floating on the surface. The purpose of the at least one anchor is to ensure the loading station 4 will be kept at approximately the same position compared to the platform or vessel independent of wind- and/or current direction.
When a tanker 12 arrive to be connected to the system in order to load to/from the platform/vessel, it will after positioning itself with the bow in correct position to the loading station 4, first pick up the pick-up-arrangement 11 and then pull inn the loading station 4 until the swivel pipe-end-piece 7 can be connected to the bow manifold 12 of the vessel and the loading/unloading can start. When the loading station 4 is pulled up, the weight 6 will be lifted from the bottom and "hover" freely until the loading station 4 is lowered into the water after the completion of the loading operation.
With such a system the tanker will, if the wind and/or the current should change, by means of its dynamic positioning system, rotates around the loading station 4 without this creating an immediate risk for the production platform/-vessel.

Claims

P a t e n t C l a i m s
1. Mooring system for a loading station, i.e. a mooring system for a loading station which can be located in a safe distance from a production platform/vessel, where a conventional tanker with dynamic positioning and bow loading equipment can be connected for load transfer to/from a fixed floating platform/vessel, characterized in the loading station (4) is connected to a flexible conduit (3) anchored to the seabed in a point (9) by at least one line (13) to at least one anchor (5) and at least one weight (6) resting on the seabed.
2. Mooring system according to claim 1, characterized in the loading station (4) comprising a swivel pipe-end-piece (7) and a buoyancy element (8) which provides a positive buoyancy for the loading station (4) and part of the flexible conduit (3).
3. Mooring system according to claim 1, characterized in the loading station
(4) is kept under the surface by the weight (6) resting on the seabed.
4. Mooring system according to claim 1, characterized in the line consisting of a wire, chain and/or polyester rope.
PCT/NO2007/000378 2006-10-26 2007-10-25 Mooring system for a loading station WO2008051090A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BRPI0717351-2A2A BRPI0717351A2 (en) 2006-10-26 2007-10-25 DRAWING SYSTEM FOR A CARGO STATION
EP07834786A EP2084053A4 (en) 2006-10-26 2007-10-25 Mooring system for a loading station
US12/444,660 US20100034594A1 (en) 2006-10-26 2007-10-25 Mooring system for a loading station

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20064900A NO20064900L (en) 2006-10-26 2006-10-26 Anchorage system for a loading station
NO20064900 2006-10-26

Publications (1)

Publication Number Publication Date
WO2008051090A1 true WO2008051090A1 (en) 2008-05-02

Family

ID=39324812

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2007/000378 WO2008051090A1 (en) 2006-10-26 2007-10-25 Mooring system for a loading station

Country Status (5)

Country Link
US (1) US20100034594A1 (en)
EP (1) EP2084053A4 (en)
BR (1) BRPI0717351A2 (en)
NO (1) NO20064900L (en)
WO (1) WO2008051090A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0722459D0 (en) 2007-11-16 2007-12-27 Wellstream Int Ltd Flexible pipe support
CA2814792A1 (en) * 2010-11-09 2012-05-18 Wellstream International Limited Riser assembly and method
EP2699754B1 (en) * 2011-04-18 2018-03-14 Magma Global Limited Subsea conduit system
US10322787B2 (en) 2016-03-01 2019-06-18 Brunswick Corporation Marine vessel station keeping systems and methods
US10640190B1 (en) 2016-03-01 2020-05-05 Brunswick Corporation System and method for controlling course of a marine vessel
US10671073B2 (en) * 2017-02-15 2020-06-02 Brunswick Corporation Station keeping system and method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3111926A (en) * 1961-12-07 1963-11-26 Shell Oil Co Apparatus for anchoring underwater vessels
US3252439A (en) * 1961-12-07 1966-05-24 Shell Oil Co Underwater oil gathering installation
GB2173160A (en) * 1985-04-05 1986-10-08 Amtel Inc Vessel mooring and hydrocarbon transfer system
US4648848A (en) * 1985-11-12 1987-03-10 Fluor Corporation Spar buoy fluid transfer system
US5044297A (en) * 1990-09-14 1991-09-03 Bluewater Terminal Systems N.V. Disconnectable mooring system for deep water
US5823131A (en) * 1996-12-08 1998-10-20 Fmc Corporation Method and apparatus for disconnecting and retrieving multiple risers attached to a floating vessel
US5944448A (en) * 1996-12-18 1999-08-31 Brovig Offshore Asa Oil field installation with mooring and flowline system
WO2002092423A1 (en) * 2001-05-16 2002-11-21 Ingenium As A connector assembly and a connector body for offshore transfer of fluid

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4802431A (en) * 1985-11-27 1989-02-07 Amtel, Inc. Lightweight transfer referencing and mooring system
US5025743A (en) * 1985-11-27 1991-06-25 Amtel, Inc. Vertical line mooring system
US5553976A (en) * 1994-02-18 1996-09-10 Korsgaard; Jens Fluid riser between seabed and floating vessel
GB0002703D0 (en) * 2000-02-08 2000-03-29 Victoria Oilfield Dev Limited Mooring and flowline system
US7793723B2 (en) * 2006-01-19 2010-09-14 Single Buoy Moorings, Inc. Submerged loading system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3111926A (en) * 1961-12-07 1963-11-26 Shell Oil Co Apparatus for anchoring underwater vessels
US3252439A (en) * 1961-12-07 1966-05-24 Shell Oil Co Underwater oil gathering installation
GB2173160A (en) * 1985-04-05 1986-10-08 Amtel Inc Vessel mooring and hydrocarbon transfer system
US4648848A (en) * 1985-11-12 1987-03-10 Fluor Corporation Spar buoy fluid transfer system
US5044297A (en) * 1990-09-14 1991-09-03 Bluewater Terminal Systems N.V. Disconnectable mooring system for deep water
US5823131A (en) * 1996-12-08 1998-10-20 Fmc Corporation Method and apparatus for disconnecting and retrieving multiple risers attached to a floating vessel
US5944448A (en) * 1996-12-18 1999-08-31 Brovig Offshore Asa Oil field installation with mooring and flowline system
WO2002092423A1 (en) * 2001-05-16 2002-11-21 Ingenium As A connector assembly and a connector body for offshore transfer of fluid

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2084053A4 *

Also Published As

Publication number Publication date
NO20064900L (en) 2008-04-28
BRPI0717351A2 (en) 2014-01-21
US20100034594A1 (en) 2010-02-11
EP2084053A1 (en) 2009-08-05
EP2084053A4 (en) 2012-12-05

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