US20050005832A1 - Turret mooring apparatus for power plant - Google Patents

Turret mooring apparatus for power plant Download PDF

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Publication number
US20050005832A1
US20050005832A1 US10/738,769 US73876903A US2005005832A1 US 20050005832 A1 US20050005832 A1 US 20050005832A1 US 73876903 A US73876903 A US 73876903A US 2005005832 A1 US2005005832 A1 US 2005005832A1
Authority
US
United States
Prior art keywords
vessel
turret
riser pipe
mooring apparatus
cable
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.)
Abandoned
Application number
US10/738,769
Other languages
English (en)
Inventor
Marinus Uittenbogaard
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.)
Bluewater Energy Services BV
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to BLUEWATER ENERGY SERVICES BV reassignment BLUEWATER ENERGY SERVICES BV ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: UITTENBOGAARD, MARINUS
Publication of US20050005832A1 publication Critical patent/US20050005832A1/en
Abandoned 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 
    • 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 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants

Definitions

  • the present invention relates to a turret mooring system for a floating vessel which produces power from on-board power plant.
  • barges located off-shore and to transfer the power to shore and into the electricity network.
  • barges are spread-moored in a manner which does not allow the barge to weathervane around the mooring in response to the action of wind, wave and current.
  • barges may be turret-moored wherein mooring lines are attached to a turret rotatably mounted to the barge. This system allows the vessel to weathervane around the turret and the mooring lines in response to wind, wave and current action.
  • the present invention provides a vessel mooring apparatus comprising a turret structure rotatably mountable to a vessel, at least one mooring line securable to the turret, a riser pipe extending through the turret and securable to the vessel for rotation therewith relative to the turret, and an electrical cable connectable to the vessel and extending into the riser pipe, wherein the cable is operable to accommodate torsion created in use by rotation of the vessel and riser pipe relative to the turret.
  • the invention avoids the need for an electrical swivel by allowing limited weathervaning of the vessel around a turret mooring system and using the torsion-absorbing capability of the subsea electrical cable to take up the torsion created by weathervaning of the vessel.
  • the electrical cable may be suspended from hang-off means at the top of the riser pipe, or at the bottom of the riser pipe.
  • the hang-off means may comprise a clamping device. This takes the vertical load of the cable.
  • the top of the riser pipe is supported on the turret by a roller bearing, whereby the riser pipe is rotatable relative to the turret. This transfers the vertical load of the cable from the riser pipe to the turret.
  • the top of the riser pipe may be rigidly supported by a support frame mountable directly on the vessel.
  • the bottom of the riser pipe may be supported by a sliding bearing, to take the horizontal load of the cable.
  • the apparatus further comprises means to prevent or reduce bending of the electrical cable at the lower end of the riser pipe.
  • the invention also provides a vessel incorporating a mooring apparatus of the type described above.
  • means is provided which is operable to restore the original heading of the vessel when a maximum permissible rotation relative to the turret has been reached.
  • the apparatus may be designed such that the weathervaning up to about 3600 of rotation is permissible, after which point the vessel would be rotated back to its original heading either using thrust producing devices mounted on the vessel itself, or by some external means such as tugs.
  • FIG. 1 shows a cross-section of a turret-mooring apparatus in accordance with one embodiment of the present invention
  • FIGS. 2A-2D show alternative arrangements for supporting the riser pipe and electrical cable
  • FIG. 3 shows an arrangement for supporting the bottom of the riser pipe.
  • a floating vessel 10 has a vertically extending aperture 12 through its hull in which a rotatable turret 14 is located, supported by upper and lower bearings 16 , 18 .
  • a plurality of mooring lines, such as anchor chains 20 are attached to the turret 14 in a known manner, for example via a chain stopper 22 to a chain hawse pipe 24 . In this way, the vessel 10 is able to rotate around the turret 14 and the anchor chains 20 in response to wave, wind and current action.
  • a riser pipe 26 passes up through the turret 14 and is connected to the vessel 10 such that it rotates with the vessel 10 relative to the turret 14 and anchor chains 20 .
  • a subsea electrical cable 28 passes up inside the riser pipe 26 and is suspended from a hang-off 30 , such as a clamping device at the tope of the riser pipe 26 .
  • a hang-off 30 such as a clamping device at the tope of the riser pipe 26 .
  • it may be suspended from a hang-off located at the bottom of the riser pipe 26 .
  • the cable 28 still extends up above the hang-off up through the riser pipe 26 for connection to the power plant, while the hang-off takes the vertical load of the cable 28 .
  • the riser pipe 26 may be supported at the top by a roller bearing 32 to take the vertical load of cable 28 .
  • the bottom of the riser pipe 26 may be supported by a sliding bearing 34 to take the horizontal load of the cable 28 .
  • FIGS. 2A-2D show in more detail alternative embodiments of an arrangement for supporting the turret 14 , riser pipe 26 and cable 28 .
  • the top of the cable 28 is attached to a clamping device 30 which is itself attached to the vessel 10 .
  • the clamping device 30 , cable 28 and riser pipe 26 are rotatably supported on the turret 14 by a bearing 32 and the turret rotatably supported on the vessel 10 by a bearing 16 .
  • the riser 26 and cable 28 and clamping device 30 are mounted on a support frame 42 secured to the part of the upper turret bearing 16 that is itself mounted on the vessel 10 .
  • the riser 26 and cable 28 and clamping device 30 are mounted on a support frame 44 secured directly to the deck of the vessel 10 .
  • the riser 26 and cable 28 and clamping device 30 are mounted on a cantilevered arm 46 secured to the deck of the vessel 10 .
  • the riser 26 and cable 28 and clamping device 30 are mounted so as to be rotatable with the vessel 10 and relative to the turret 14 .
  • Means to prevent excessive bending of the electrical cable 28 is preferably provided at the underside of the riser pipe 26 .
  • This may be in the form of a known device such as a bend stiffener or bend restricter 36 as shown in FIG. 3 .
  • the bend stiffener 36 itself may be supported from a hang-off 38 at the bottom of the riser pipe 26 .
  • the cable 28 is able to slide freely relative to the bend stiffener 36 .
  • the riser pipe 26 rotates with the vessel 10 .
  • the cable 28 accommodates the torsion this creates.
  • the cable 28 is able to accommodate in the order of a few degrees per metre and thus the allowability angle to which the vessel 10 can rotate around the turret 14 depends upon the length of the subsea cable 28 .
  • Means are provided to return the vessel to its original heading when the maximum permissible amount of rotation has been achieved. This may involve thrust means of the vessel 10 itself, or thrust may be provided externally, for example by means of tugs (not shown).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Electric Cable Arrangement Between Relatively Moving Parts (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
US10/738,769 2002-12-24 2003-12-17 Turret mooring apparatus for power plant Abandoned US20050005832A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0230142A GB2396593B (en) 2002-12-24 2002-12-24 Turret mooring apparatus for power plant
GB0230142.2 2002-12-24

Publications (1)

Publication Number Publication Date
US20050005832A1 true US20050005832A1 (en) 2005-01-13

Family

ID=9950418

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/738,769 Abandoned US20050005832A1 (en) 2002-12-24 2003-12-17 Turret mooring apparatus for power plant

Country Status (3)

Country Link
US (1) US20050005832A1 (fr)
EP (1) EP1433699A1 (fr)
GB (1) GB2396593B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101044262B1 (ko) * 2009-08-18 2011-07-01 유융상 판스프링을 이용한 완력기
WO2014116185A1 (fr) * 2013-01-25 2014-07-31 Tmt Pte. Ltd. Installation en mer
US20160368573A1 (en) * 2013-11-01 2016-12-22 Scana Offshore As Turret

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0811606D0 (en) * 2008-06-25 2008-07-30 Sigma Offshore Ltd Offshore vessel mooring and riser inboarding

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4406333A (en) * 1981-10-13 1983-09-27 Adams Johnie R Rotating head for rotary drilling rigs
US4420276A (en) * 1980-04-24 1983-12-13 The British Petroleum Company Limited Bearing assembly for a tethered buoyant platform
US4597595A (en) * 1985-02-26 1986-07-01 Bechtel International Corporation Swivel-less coupling apparatus
US4639228A (en) * 1984-12-24 1987-01-27 Mobil Oil Corporation Rotating multi-path fluid manifold
US4774903A (en) * 1986-02-12 1988-10-04 The Marconi Company Limited Mooring tether
US5893334A (en) * 1993-12-03 1999-04-13 Fmc Corporation Method and apparatus for mooring floating storage vessels
US5913279A (en) * 1995-03-08 1999-06-22 Single Buoy Moorings Inc. Bearing arrangement for limiting deflection of a turret of a turret mooring device
US20020177375A1 (en) * 2001-05-22 2002-11-28 Fmc Corporation, Inc. Hybrid buoyant riser/tension mooring system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO970657L (no) * 1997-02-13 1998-08-14 Hitec Asa Opplagring av et antall parallelle r°rledninger/slanger/kabler ect. mellom en overflatefarkost og et punkt pÕ havbunnen
NL1016986C2 (nl) * 2000-12-22 2002-07-01 Beheersmij P Buitendijk B V Mastconstructie alsmede werkwijze voor het plaatsen daarvan.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4420276A (en) * 1980-04-24 1983-12-13 The British Petroleum Company Limited Bearing assembly for a tethered buoyant platform
US4406333A (en) * 1981-10-13 1983-09-27 Adams Johnie R Rotating head for rotary drilling rigs
US4639228A (en) * 1984-12-24 1987-01-27 Mobil Oil Corporation Rotating multi-path fluid manifold
US4597595A (en) * 1985-02-26 1986-07-01 Bechtel International Corporation Swivel-less coupling apparatus
US4774903A (en) * 1986-02-12 1988-10-04 The Marconi Company Limited Mooring tether
US5893334A (en) * 1993-12-03 1999-04-13 Fmc Corporation Method and apparatus for mooring floating storage vessels
US5913279A (en) * 1995-03-08 1999-06-22 Single Buoy Moorings Inc. Bearing arrangement for limiting deflection of a turret of a turret mooring device
US20020177375A1 (en) * 2001-05-22 2002-11-28 Fmc Corporation, Inc. Hybrid buoyant riser/tension mooring system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101044262B1 (ko) * 2009-08-18 2011-07-01 유융상 판스프링을 이용한 완력기
WO2014116185A1 (fr) * 2013-01-25 2014-07-31 Tmt Pte. Ltd. Installation en mer
CN105073573A (zh) * 2013-01-25 2015-11-18 泰姆特私人有限公司 海上设施
US10279871B2 (en) 2013-01-25 2019-05-07 Tmt Pte. Ltd. Offshore facility with metal processing apparatus and power generation system
US20160368573A1 (en) * 2013-11-01 2016-12-22 Scana Offshore As Turret
US10160522B2 (en) * 2013-11-01 2018-12-25 Scana Offshore As Turret

Also Published As

Publication number Publication date
EP1433699A1 (fr) 2004-06-30
GB2396593A (en) 2004-06-30
GB2396593B (en) 2004-11-10
GB0230142D0 (en) 2003-01-29

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BLUEWATER ENERGY SERVICES BV, NETHERLANDS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UITTENBOGAARD, MARINUS;REEL/FRAME:014821/0320

Effective date: 20031212

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION