WO1999030963A1 - Bouee d'ancrage detachable submergee et navire - Google Patents

Bouee d'ancrage detachable submergee et navire Download PDF

Info

Publication number
WO1999030963A1
WO1999030963A1 PCT/NO1997/000339 NO9700339W WO9930963A1 WO 1999030963 A1 WO1999030963 A1 WO 1999030963A1 NO 9700339 W NO9700339 W NO 9700339W WO 9930963 A1 WO9930963 A1 WO 9930963A1
Authority
WO
WIPO (PCT)
Prior art keywords
buoy
vessel
anchor
receptacle
pulling
Prior art date
Application number
PCT/NO1997/000339
Other languages
English (en)
Inventor
Knut BØRSETH
Original Assignee
Petroleum Geo-Services 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
Priority to NO19962506A priority Critical patent/NO310604B1/no
Application filed by Petroleum Geo-Services Asa filed Critical Petroleum Geo-Services Asa
Priority to AU53503/98A priority patent/AU5350398A/en
Priority to PCT/NO1997/000339 priority patent/WO1999030963A1/fr
Publication of WO1999030963A1 publication Critical patent/WO1999030963A1/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

Definitions

  • the present invention relates to a method for connecting an anchor line to an attachment point on a submerged anchor buoy for a floating vessel having a vertical shaft provided at the lower end with receiving means for the buoy.
  • An object of the present invention is to provide a method for connecting an anchor line to an attachment point on a submerged anchor buoy that can be performed in a simple and safe manner without considerable auxiliary equipment.
  • the first object is obtained by a method as defined in the introductory paragraph, the method being characterized by - connecting the buoy to the vessel so as to permit the attachment point to turn about a vertical axis of said shaft, attaching a connecting element at the free end of a pre-installed anchor line to a receptacle at the end of a pulling line running through the bottom of said vessel at a point closer to said axis than said attachment point, pulling the connecting element by means of the receptacle and the pulling line into close proximity to said attachment point, adjusting the relative position of the connecting element and the attachment point and joining them together, and removing the receptacle from the connecting element.
  • the method permits measuring the tension of the lines during installation, thus allowing for immediate fine adjustment of their length.
  • the second object mentioned above can be obtained by disconnecting an anchor line using some of the method steps above in reverse, adjusting the length of the anchor line, and then reinstalling it by using the above method, even while the vessel is in normal use.
  • the invention also relates to a floating vessel equipped to allow performing said methods.
  • a vessel is defined in claim 5.
  • the vessel which may be an oil production ship, is generally designated by reference numeral 1.
  • the vessel has a main deck 2 and a bottom 3 , between which a vertical shaft 4 extends.
  • a turret 5 is located in the shaft 4 and is supported axially and radially by a suitable bearing arrangement 6 at the main deck 2 level.
  • the turret 5 is also radially supported by a self-lubricating sliding bearing 7 in the lower part of the shaft 4.
  • the turret is also provided with a chain stopper 8 and an operating mechanism 9 for a locking arrangement 10 at the bottom of the turret for locking an anchor buoy 11 to the turret .
  • the turret 5 is also provided with a main connector 12 for the buoy and a plurality of riser con- nectors 13, only one of which is shown.
  • the anchor buoy 11 is provided with a plurality of attachment points 14 for anchor lines 15, the attachment point devices comprising a fork-like structure having a trans- verse pin 16 and a shaft journalled in a bearing 17.
  • the bearing or the pin may contain a load cell arrangement in order to register the tension of the respective anchor line 15.
  • the anchor line is shown in an unconnected condition and is at its free end provided with a dual hook 18 having an upper hook and a lower hook.
  • the turret 5 is provided with a turret turning system 19 and a swivel arrangement 20 having a central passage therethrough.
  • the swivel arrangement is rotatably connecting production piping on the turret 5 and vessel 1, respectively, in a well-known manner.
  • the main deck 2 of the vessel supports a gantry 21 carrying a sheave 22 at its free end.
  • the sheave is located above the central passage of the swivel arrangement 20.
  • a rope 23 extends from a winch 24 over the sheave 22 and down through the swivel arrangement to a short chain 25 connected to the top of the anchor buoy 11.
  • a plurality of buoyancy elements 26 are arranged with a loose fit on the rope 23 so as to be slidable along the rope. The purpose of these buoyancy elements is to keep the free end of the rope floating on the surface when the buoy 11 and rope 23 has been released from the vessel 1, a stopper for the buoyancy elements having been installed at the free end of the rope 2 before said release.
  • the outer dimensions of the buoyancy elements 16 are sufficiently small for them to pass through the central passage of the chain stopper 8 and main connector 12.
  • the vessel 1 is provided with a second shaft 27 extending between the main deck and bottom of the vessel, this second shaft accommodating a pulling wire 28 passing from the winch 24 via a sheave 29 down through the second shaft and through a J-type sliding fairlead 30 at the bottom of the shaft.
  • the free end of the pulling wire 28 is connected to a receptacle 31 generally in the form of a steel ring which can be hooked into the upper hook of the dual hook 18 at the end of the anchor line 15.
  • the receptacle 31 is also connected to the free end of a supporting wire 32, which extends through a double J-type sliding fairlead 33 at the bottom of a third shaft 34, up through said shaft and over a sheave 35 to a second winch (not shown) .
  • a television camera 36 is located in the bottom 3 of the ship between the shafts 27 and 34, preferably directly above the attachment point 14 on the anchor buoy 11.
  • the method for connecting the anchor lines 15 to the buoy 11 assumes that the buoy has been brought into the position shown in the drawing, for example by suitably ballasting the buoy while having the rope 23 attached to the pulling wire of the winch 24 and then raising the buoy into contact with the receiving means 10, 12 of the turret.
  • the method further assumes that the various anchors and anchor lines 15 have been deployed on the ocean floor and that retrieving lines with marker floats are connected to the free ends (dual hooks 18) of the anchor lines.
  • the receptacle 31 has been lifted to the deck of the vessel 1 while concurrently slacking the pulling wire 28 and supporting wire 32 as necessary. This may be done by means of a permanently or diver connected handling line.
  • An auxiliary vessel for instance an anchor handling tug, will deliver a messenger line to the production vessel 1.
  • This messenger line is connected to the receptacle 31 , which is hauled over to the tug and brought by the tug to the location of the marker float of the anchor line to be installed.
  • Pulling wire 28 and supporting wire 32 are paid out as necessary during this operation.
  • the anchor line is pulled to the surface and the upper hook of its dual hook 18 is connected to the receptacle 31.
  • the anchor line and receptacle is subsequently lowered by means of a double part wire.
  • the turret turning system 19 is used to move the attachment point 14 on the buoy 11 somewhat to the side of the line of the pulling wire 28 so as not to interfere therewith when, in the next step, the pulling wire 28 is heaved in in order to pull the anchor line 15 with its dual hook 18 into a position as indicated by the dash-dot-line 37.
  • the slack in the supporting line 32 will be taken up as necessary during this operation.
  • the supporting wire 32 With the receptacle 31 in the position shown with the dual hook 18 connected thereto, the supporting wire 32 is tightened so as to lift the anchor line 15 with the hook 18 approximately to the level shown. With the line and hook in this position, the turret turning system 19 is operated so as to move the attachment point 14 directly below the hook 18, e.g. with the aid of the television camera 36. By first paying out on the supporting wire 32 and then on the pulling wire 28, the lower hook of the dual hook 18 can be made to engage the transverse pin 16 of the attachment point 14.
  • the receptacle ring 31 may be disengaged from the upper hook of the dual hook 18, and the receptacle 31 is subsequently brought up to the deck level of the vessel 1 to be ready for the installation procedure of the next anchor line.
  • the second anchor line will preferably be one diametrally opposed to the first anchor line 15 installed.
  • the vessel is turned 180° while the turret turning system 19 is moving the turret through the same angle so that the anchor line 15 already installed will maintain its position with respect to the sea floor. Thereafter, the procedure outlined above is repeated.
  • the vessel 1 and turret are turned so as to bring the attachment point 14 in question directly below the television camera 36.
  • the receptacle 31 can be hooked onto the upper hook of the dual hook 18, and by pulling further on the pulling wire 28, the dual hook 18 may be disengaged from the pin 16 of the attachment point device.
  • the vessel 1 or turret 5 is turned somewhat so that the anchor line 15 and hook 18 will clear the attachment point 14 when the pulling wire 28 is paid out.
  • the hook 18 and the end of the anchor line 15 are brought on board the tug, where the anchor line may be shortened or lengthened appropriate- ly before it is again installed on the attachment point using the same procedure as followed during the initial installation.
  • the diameter of the second shaft 27 is sufficiently large for the J-type fairlead 30 along with the receptacle 31 to be pulled up to the level of the main deck 2 of the vessel for maintenance or replacement. Furthermore, the attach- ment point 14 may also be removed for maintenance or replacement by using the pulling wire 28 and supporting wire 32. Diver assistance may be used to connect the wires to the attachment point, or the receptacle 31 may be replaced by suitable remotely operated grabbing equipment to lock onto the attachment point device 14.
  • the pulling wire 28 may have its own winch instead of sharing the winch 24 with the lifting rope 23 of the buoy.
  • the lifting rope 23 and pulling wire 28 may have separate drums on the same winch.
  • the winch 24 may be used when installing flexible risers 38 in the buoy 11. This is indicated by the pulling line 39 passing over guide rollers 40 and 41.
  • the rigid internal riser 42 is lifted by means of the cylinder 43. Since the rigid riser 42 is pivotably connected to pivot arms 44, it will swing laterally out of the way when lifted.
  • load cells or other instrumentation may be connected to the vessel, e.g. through the locking arrangement 10, so as to permit continuous monitoring of anchor line tension.

Abstract

L'invention concerne un procédé permettant de rattacher une ligne (15) d'ancrage à un point (14) d'attache sur une bouée (11) d'ancrage submergée, procédé destiné à un bâtiment flottant (1) pourvu d'un arbre (4) vertical à l'extrémité inférieure duquel se trouve un dispositif (10, 12) de réception de la bouée. Ledit procédé consiste à: rattacher la bouée (11) au navire de manière à permettre au point (14) d'attache de tourner autour d'un axe vertical de l'arbre (4); à attacher un élément de raccordement (18) situé à l'extrémité libre d'une ligne (15) d'ancrage pré-installée à un réceptacle (31) situé à l'extrémité d'une ligne (28) de hissage courant le long du fonds (3) du navire en un point plus proche de l'axe que le point (14) d'attache; à hisser l'élément (18) de raccordement au moyen du réceptacle (31) et de la ligne (38) de hissage à proximité du point (14) d'attache; à ajuster la position relative de l'élément (18) de raccordement et du point (14) d'attache et à les rassembler; à retirer le réceptacle (31) de l'élément (18) de connexion. L'invention concerne également un navire (1) équipé de l'appareillage (24, 27-36) permettant de mettre en oeuvre ledit procédé.
PCT/NO1997/000339 1996-06-13 1997-12-15 Bouee d'ancrage detachable submergee et navire WO1999030963A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NO19962506A NO310604B1 (no) 1996-06-13 1996-06-13 Neddykket frigjörbar böye
AU53503/98A AU5350398A (en) 1997-12-15 1997-12-15 Submerged disconnectable anchor buoy and ship
PCT/NO1997/000339 WO1999030963A1 (fr) 1996-06-13 1997-12-15 Bouee d'ancrage detachable submergee et navire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO19962506A NO310604B1 (no) 1996-06-13 1996-06-13 Neddykket frigjörbar böye
PCT/NO1997/000339 WO1999030963A1 (fr) 1996-06-13 1997-12-15 Bouee d'ancrage detachable submergee et navire

Publications (1)

Publication Number Publication Date
WO1999030963A1 true WO1999030963A1 (fr) 1999-06-24

Family

ID=26648674

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1997/000339 WO1999030963A1 (fr) 1996-06-13 1997-12-15 Bouee d'ancrage detachable submergee et navire

Country Status (2)

Country Link
NO (1) NO310604B1 (fr)
WO (1) WO1999030963A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007045662A1 (fr) * 2005-10-17 2007-04-26 Single Buoy Moorings Inc. Systeme d’amarrage a tourelle flottant largable ameliore
WO2007108705A1 (fr) * 2006-03-23 2007-09-27 Framo Engineering As Systeme et procede de connexion destines a connecter et a deconnecter une unite flottante a et d'une bouee reliee a une installation sous-marine
EP1861309A1 (fr) * 2005-03-22 2007-12-05 Advanced Production and Loading AS Systeme d enclenchement d'amarrage
WO2010106134A3 (fr) * 2009-03-18 2011-07-21 Single Buoy Moorings Inc. Système d'amarrage ayant des câbles d'amarrage découplés et/ou système de colonnes montantes
CN102649465A (zh) * 2011-02-23 2012-08-29 蓝水能源服务有限公司 可分离系泊系统及用于分离或再连接该系泊系统的方法
RU2508222C2 (ru) * 2009-10-23 2014-02-27 Блюуотер Энерджи Сёвисиз Б.В. Способ отсоединения буя от судна и устройство для использования в этом способе
GB2590508A (en) * 2019-12-20 2021-06-30 Sustainable Marine Energy Ltd Improved turret mooring system
GB2592170A (en) * 2019-12-20 2021-08-18 Sustainable Marine Energy Ltd Improved turret mooring system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4606727A (en) * 1983-12-07 1986-08-19 Blohm & Voss Ag Anchoring arrangement for a tanker, including a fluid transfer system
EP0259072A1 (fr) * 1986-08-27 1988-03-09 Taylor Woodrow Construction Limited Système d'amarrage et système pour amarrer une structure flottante

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4606727A (en) * 1983-12-07 1986-08-19 Blohm & Voss Ag Anchoring arrangement for a tanker, including a fluid transfer system
EP0259072A1 (fr) * 1986-08-27 1988-03-09 Taylor Woodrow Construction Limited Système d'amarrage et système pour amarrer une structure flottante

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1861309A4 (fr) * 2005-03-22 2012-05-30 Advanced Prod & Loading As Systeme d enclenchement d'amarrage
EP1861309A1 (fr) * 2005-03-22 2007-12-05 Advanced Production and Loading AS Systeme d enclenchement d'amarrage
US7766710B2 (en) 2005-10-17 2010-08-03 Single Buoy Moorings Inc. Disconnectable buoyant turrent mooring system
WO2007045662A1 (fr) * 2005-10-17 2007-04-26 Single Buoy Moorings Inc. Systeme d’amarrage a tourelle flottant largable ameliore
WO2007108705A1 (fr) * 2006-03-23 2007-09-27 Framo Engineering As Systeme et procede de connexion destines a connecter et a deconnecter une unite flottante a et d'une bouee reliee a une installation sous-marine
US7985110B2 (en) 2006-03-23 2011-07-26 Framo Engineering As Connection system and method for connecting and disconnecting a floating unit to and from a buoy which is connected to a subsea installation
US8851004B2 (en) 2009-03-18 2014-10-07 Single Buoy Moorings Inc. Mooring system with decoupled mooring lines and/or riser system
CN102356019A (zh) * 2009-03-18 2012-02-15 瑞士单浮筒系泊公司 具有脱离的系缆和/或立管系统的系泊系统
US9187153B2 (en) 2009-03-18 2015-11-17 Single Buoy Moorings Inc. Mooring system with decoupled mooring lines and/or riser system
WO2010106134A3 (fr) * 2009-03-18 2011-07-21 Single Buoy Moorings Inc. Système d'amarrage ayant des câbles d'amarrage découplés et/ou système de colonnes montantes
RU2519456C2 (ru) * 2009-03-18 2014-06-10 Сингл Бой Мурингс Инк. Система швартовки с отделенными якорными оттяжками и/или системой водоотделяющих колонн
RU2508222C2 (ru) * 2009-10-23 2014-02-27 Блюуотер Энерджи Сёвисиз Б.В. Способ отсоединения буя от судна и устройство для использования в этом способе
US8651040B2 (en) 2011-02-23 2014-02-18 Bluewater Energy Services B.V. Disconnectable mooring system and method for disconnecting or reconnecting it
AU2012200901B2 (en) * 2011-02-23 2013-05-30 Bluewater Energy Services B.V. Disconnectable mooring system and method for disconnecting or reconnecting it
JP2012171619A (ja) * 2011-02-23 2012-09-10 Bluewater Energy Services Bv 接続解除可能な係留システム、及び当該係留システムを接続解除又は再接続するための方法
EP2492183A1 (fr) * 2011-02-23 2012-08-29 Bluewater Energy Services B.V. Système d'amarrage pouvant être débranché et procédé pour le déconnecter et le connecter
CN102649465A (zh) * 2011-02-23 2012-08-29 蓝水能源服务有限公司 可分离系泊系统及用于分离或再连接该系泊系统的方法
RU2581312C2 (ru) * 2011-02-23 2016-04-20 Блюуотер Энерджи Сёвисиз Б.В. Отсоединяемая швартовная система и способ ее отсоединения или повторного присоединения
GB2590508A (en) * 2019-12-20 2021-06-30 Sustainable Marine Energy Ltd Improved turret mooring system
GB2592170A (en) * 2019-12-20 2021-08-18 Sustainable Marine Energy Ltd Improved turret mooring system
GB2590508B (en) * 2019-12-20 2021-12-22 Sustainable Marine Energy Ltd Improved turret mooring system
GB2592170B (en) * 2019-12-20 2021-12-22 Sustainable Marine Energy Ltd Improved turret mooring system

Also Published As

Publication number Publication date
NO310604B1 (no) 2001-07-30
NO962506D0 (no) 1996-06-13
NO962506L (no) 1998-03-31

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