WO2012032163A1 - Système de mouillage détachable comprenant des raccords groupés - Google Patents

Système de mouillage détachable comprenant des raccords groupés Download PDF

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Publication number
WO2012032163A1
WO2012032163A1 PCT/EP2011/065661 EP2011065661W WO2012032163A1 WO 2012032163 A1 WO2012032163 A1 WO 2012032163A1 EP 2011065661 W EP2011065661 W EP 2011065661W WO 2012032163 A1 WO2012032163 A1 WO 2012032163A1
Authority
WO
WIPO (PCT)
Prior art keywords
turret
buoy
moonpool
connectors
mooring
Prior art date
Application number
PCT/EP2011/065661
Other languages
English (en)
Inventor
Philippe Lavagna
Original Assignee
Single Buoy Moorings Inc.
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 Single Buoy Moorings Inc. filed Critical Single Buoy Moorings Inc.
Publication of WO2012032163A1 publication Critical patent/WO2012032163A1/fr

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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
    • 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 invention relates to a disconnectable mooring system for a weathervaning vessel that is provided with a moonpool which extends from deck level to keel level, a turret to be held within the moonpool, a swivel unit for transfer of fluids mounted on the turret, a bearing assembly between the turret and the moonpool, a buoy anchored to the seabed via multiple mooring lines and that can be retrieved in the moonpool and be connected to the turret, a locking assembly for mechanically locking the buoy to the turret and at least one riser for transfer of fluids from or to the seabed and which is supported by the buoy.
  • the present invention also relates to a method of mooring a vessel with a disconnectable mooring system according to the present invention.
  • a buoy-turret mooring system is a disconnectable buoy turret system in which a buoy is connected to a central structural connector which is placed at the lower end of a turret that is placed within a moonpool of a vessel. When the structural connector is opened, the buoy will be disconnected and will sink to a predetermined submerged level due to the weight of the anchor lines that are connected to the buoy.
  • the present invention relates to the field of internal turret mooring systems that are permanently integrated into the hull of the FPSO vessel. Such a system allows the vessel to passively "weathervane” around multiple anchor legs, while simultaneously transferring fluids, power, and communications signals between the FPSO and the seabed.
  • the internal turret mooring system consists of a cylindrical turret structure located within a cylindrical moonpool integrated in the hull of the FPSO.
  • a large diameter segmented roller bearing can connect the turret to the moonpool of the vessel.
  • the bearing is mounted to its support structures by high strength, hydraulically pre-tensioned bolts.
  • the main bearing which rotatably supports the turret within the moon pool of a vessel is preferable placed above water level, near the deck of the vessel.
  • turret bearing arrangements possible for supporting the turret on the vessel, for example an axial radial bearing system, a segmented bearing system, a bogie wheel system or a sliding bearing system.
  • mooring buoy installation winches
  • production equipment Located at the top the turret are mooring buoy installation (winches) and production equipment.
  • the swivel stack is located above the turret, with associated piping, manifolds and access arrangements.
  • the lower section of the turret structure houses the riser buoy that is connected to the turret via a hydraulically activated structural connector at the lower end of the turret.
  • the upper end of each mooring line is connected to an articulated universal joint underneath the buoy.
  • the lower end of each mooring line is connected to an anchor that is embedded into the seabed.
  • Production well fluids pass between the seabed and the riser buoy via flexible risers.
  • Hydraulic and electrical control umbilicals are also routed between the riser buoy and the seabed.
  • the risers and umbilicals are routed for example slidable through tubular guides (I-tubes) to a riser deck at the top of the buoy.
  • the top of the buoy has a recess where risers and umbilicals terminate.
  • the riser termination flanges are connected to the turret piping via hydraulically actuated fluid connectors. From the turret the fluids that are transferred via the risers are routed to the swivel stack and then via process modules at the deck, to tanks of the FPSO.
  • the riser buoy is a fabricated steel cylindrical shell structure. The size has been determined based on the buoyancy required for keeping the risers and anchor legs at the specified underwater level in disconnected mode. The compartments have been designed to secure that the buoy is still floating with the accidental flooding of two annular or one internal compartment. The buoy is further conical shaped such that it will not contact other turret parts during disconnection.
  • the volume of the buoy is such that it will sink to a predetermined depth upon disconnection from the turret, due to the weight of the anchor lines.
  • the buoy is connected to the turret with several structural connectors.
  • one important issue is how to keep the connectors in the dry permanently with the variations in draft of the vessel, i.e. even when the vessel is fully loaded with hydrocarbons.
  • having the connection above water level is preferred in order to facilitate repair and maintenance of the connection means while it also limit the corrosion and wear of these means.
  • Solutions such as protecting the connectors with a cage or a cover around them, or alternatively a cage in the turret that could be drained off are also not ideal as due to its location, the water barrage can easily get damaged during reconnection or even worse create the risk of entanglement of the buoy against the receiving turret cone during reconnection.
  • connection deck diameter of the buoy can be optimized which is advantageous as the overall diameter of a buoyant turret mooring has a significant influence on the cost of the system.
  • the locking assembly comprises at least two connectors, each connector provided with a clamp that can be moved in radially outward direction to connect the buoy to the turret.
  • the connectors of the locking assembly are grouped in specific sectors on the turret structure, the groups of mooring lines and the clamping areas of the groups of connectors also being on the same azimuth sectors of the buoy.
  • the buoy comprising two rings and locally reinforced structures between said rings.
  • the locally reinforced structures are aligned with the groups of mooring lines and the groups of connectors in order to optimize the load path between mooring lines and the weathervaning system.
  • Another object of the present invention is an improved load transfer between the grouped mooring lines that are connected to the buoy and the connectors of the turret.
  • a further object of the present invention is a method to moor a vessel with the equipment as claimed.
  • FIG. 1 shows a vessel and a buoy in a disconnected state, the connector member or riser deck being supported on the buoy,
  • FIG. 2 shows a vessel and a buoy in a connected situation
  • FIG. 3a shows the reinforcement on the buoy structure and FIG. 3b shows the reinforcement on the turret structure transferring the mooring loads
  • FIG. 4a shows a top view of a mooring buoy according to the prior art
  • FIG. 4b shows a top view of a mooring buoy according to the present invention
  • FIG. 1 and 2 show a disconnectable mooring system according to the present invention, with a vessel 1 with a moonpool 5 extending from deck till keel level, a turret 3 placed within the moonpool 5, a swivel unit mounted on the turret 3, a bearing assembly 22 (see attached fig 1) for rotatably mounting the turret with respect to the vessel, a buoy anchored to the seabed via several groups of mooring lines 9', 9" and 9"' and which is retrievable into the moonpool 5 of the vessel 1 and connectable to the turret 3, a locking assembly 7 for locking the buoy 6 to the turret 3 and three groups of three risers 8', 8", 8"' being supported by the buoy 6, the locking assembly 7 being an assembly of several connectors 10', 10", 10" ' grabbing a connector flange at the top of the buoy 6 from the inside.
  • Figure 1 also shows that turret 3 comprises reinforced structures 14 located between a turret top ring
  • FIG.2 shows that the load path between the buoy and the lower turret cylinder can be optimized by aligning (in a vertical direction) the groups of mooring lines and the groups of connectors on the same azimuth sectors.
  • the load path between the mooring lines and the weathervaning system is optimized and transferred via locally re-enforced structure between two structural rings: one at lower radial stopper level and one at upper connector level.
  • the radial stoppers would also be grouped as these are the load path between the buoy and turret cylinder at the bottom of the turret cylinder level.
  • the turret top ring 15 supporting the connectors is surrounding the buoy top ring 11 and the turret bottom ring 16 is surrounding the buoy bottom ring 12.
  • the locally reinforced structures 14 of the turret structure 3 are aligned with the groups of mooring lines 9', 9", 9"' and the groups of connectors 10', 10", 10"' in order to optimize (shorten) the load path between mooring lines and the connectors of the turret.
  • a mooring system can consists of three or more groups of mooring lines as shown, which include a buoy 6 and turret 3 both being organized in three or more strong sectors making a natural structural link that matches each group of mooring lines with its corresponding group of structural connectors.
  • FIG. 3a and 3b are showing the structural components transferring the loads more clearly.
  • These structural components carrying the loads comprise as shown in FIG.3 a structural rings 11, 12 and vertical sectors of locally reinforced structures 13 which are located between said rings 11, 12 making the transition between the rings.
  • the locally reinforced structures 13 have to be designed to be large enough for allowing inspection from the inside and access to the radial stoppers for adjustment, maintenance or even change-out.
  • FIG.3b shows the (lower) turret part with structural rings 15, 16 and vertical sectors of locally reinforced structures 14 which are located between said rings 15, 16 making the transition between the rings.
  • the locally reinforced structures 14 have to be designed to be large.
  • FIG. 4a shows a top view of a mooring buoy 6 according to the prior art.
  • the structural connectors 20 are equally distributed over a circle and each grabs an upper connection flange of the buoy 6 from the outside; each connector 17 is provided with a clamp 18 that can be moved in a radially inward direction to connect the buoy to the turret .
  • Figure 4a also shows 3 concentric "layers" of equipments that are defined as following:
  • Rl is the radius of space taken by the snatch load absorber of pulling system used for the buoy reconnection
  • - R2 is the radius of the space taken by the riser termination and corresponding fluid connectors
  • - R3 is the radius of connection deck itself where the structural connectors grab the buoy.
  • the diameter of the connection deck can also be reduced by grouping the structural connectors in specific sections on the turret (3), while each connector being provided with a clamp that can be moved in a radially inward direction to connect the buoy to the turret.
  • FIG. 4b shows a top view of a mooring buoy 6 according to the present invention.
  • connection deck of the mooring buoy 6 (which is the top of the mooring buoy 6) which has a conical shape.
  • the structural connectors are grabbing an upper connection flange of the buoy 6 from the inside as each connector 17 is provided with a clamp 18 that can be moved in a radially outward direction to connect the buoy to the turret.
  • connection deck - In order to avoid a significant increase in the diameter of the connection deck - in comparison with connectors grabbing the outside of connection flange at the top of the buoy - the structural connectors are grouped into three sectors 10', 10" 10"' dedicated to the structural connectors. These connection sections are separated from each other by (three) sectors that are dedicated to the fluid connectors.
  • FIG. 4b also shows 3 concentric "layers" of equipments and as can be seen the radius R3 can be made much smaller due to a group wise arrangement of the connectors.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un système de mouillage détachable pour un navire effectuant un évitage doté d'un puits central (5) qui s'étend d'un niveau de pont vers un niveau de quille, comprenant une tourelle (3) destinée à être maintenue à l'intérieur du puits central ; une unité pivot pour le transfert de fluides montée sur la tourelle ; un ensemble de support (22) entre la tourelle et le puits central ; une bouée (6) ancrée sur le fond marin par le biais de multiples amarres (9, 9', 9''), et qui peut être récupérée dans le puits central et raccordée à la tourelle ; un ensemble de verrouillage (7) permettant de verrouiller mécaniquement la bouée sur la tourelle ; au moins une colonne montante (8) pour le transfert de fluides depuis ou vers le fond marin et supportée par la bouée ; l'ensemble de verrouillage comprenant au moins deux raccords (10', 10''), chaque raccord présentant une attache qui peut être déplacée dans une direction radialement vers l'extérieur pour le raccordement de la bouée à la tourelle.
PCT/EP2011/065661 2010-09-09 2011-09-09 Système de mouillage détachable comprenant des raccords groupés WO2012032163A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP10176035 2010-09-09
EP10176035.3 2010-09-09

Publications (1)

Publication Number Publication Date
WO2012032163A1 true WO2012032163A1 (fr) 2012-03-15

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013167805A1 (fr) 2012-05-09 2013-11-14 Aker Arctic Technology Oy Vaisseau marin
CN103482025A (zh) * 2013-09-11 2014-01-01 中国海洋石油总公司 新型内转塔单点系泊装置
WO2014031061A1 (fr) * 2012-08-24 2014-02-27 Stena Rederi Ab Procédé d'amarrage de navire et agencement pour mettre en œuvre le procédé
WO2014180687A1 (fr) * 2013-05-06 2014-11-13 Single Buoy Moorings Inc. Système de tourelle déconnectable de profondeur à configuration de colonne montante rigide de type "lazy wave"
US9315241B2 (en) 2014-05-02 2016-04-19 Seahorse Equipment Corp Buoyant turret mooring with porous receptor cage
WO2018154182A1 (fr) 2017-02-24 2018-08-30 Aker Arctic Technology Oy Agencement pour structure marine, et structure marine
EP3437979A1 (fr) * 2017-07-31 2019-02-06 NOV APL Limited Barge de colonne montante d'accueil pour fpso
WO2019025936A1 (fr) * 2017-07-31 2019-02-07 NOV APL Limited Bouée d'amarrage funiculaire et système de production flottant
CN109850070A (zh) * 2019-02-27 2019-06-07 武汉理工大学 基于可分离内转塔式系泊***的浮筒释放与回收***
US10421523B2 (en) 2017-07-31 2019-09-24 NOV APL Limited Spread moored buoy and floating production system
CN112601697A (zh) * 2018-07-31 2021-04-02 索菲克股份有限公司 可拆卸的多点系泊和立管塔***及方法
WO2021259696A1 (fr) * 2020-06-22 2021-12-30 Cefront Technology As Système d'amarrage à étalement séparable
CN114537587A (zh) * 2022-03-21 2022-05-27 广州船舶及海洋工程设计研究院（中国船舶工业集团公司第六0五研究院） 用于系泊浮筒的连接解脱装置及海上浮式生产储油船
CN114655374A (zh) * 2022-03-07 2022-06-24 武汉理工大学 基于风能-波浪能联合发电和单点系泊的深远海养殖工船

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GB2160166A (en) * 1984-06-11 1985-12-18 Exxon Production Research Co Vessel mooring system
US5823131A (en) * 1996-12-08 1998-10-20 Fmc Corporation Method and apparatus for disconnecting and retrieving multiple risers attached to a floating vessel
US20080166936A1 (en) * 2007-01-05 2008-07-10 Sofec, Inc. Detachable mooring and fluid transfer system
FR2928898A1 (fr) * 2008-03-21 2009-09-25 Saipem S A Sa Support flottant comprenant un touret equipe d'une bouee d'amarrage de conduites de liaison fond/surface deconnectable

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
US5823131A (en) * 1996-12-08 1998-10-20 Fmc Corporation Method and apparatus for disconnecting and retrieving multiple risers attached to a floating vessel
US20080166936A1 (en) * 2007-01-05 2008-07-10 Sofec, Inc. Detachable mooring and fluid transfer system
FR2928898A1 (fr) * 2008-03-21 2009-09-25 Saipem S A Sa Support flottant comprenant un touret equipe d'une bouee d'amarrage de conduites de liaison fond/surface deconnectable

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150017729A (ko) * 2012-05-09 2015-02-17 아커 아크틱 테크놀로지 오이 해양 선박
KR101927571B1 (ko) 2012-05-09 2019-03-12 아커 아크틱 테크놀로지 오이 해양 선박
WO2013167805A1 (fr) 2012-05-09 2013-11-14 Aker Arctic Technology Oy Vaisseau marin
DK178885B1 (en) * 2012-08-24 2017-04-24 Stena Rederi Ab Method of mooring of ship and arrangement to accomplish the method
US9505466B2 (en) 2012-08-24 2016-11-29 Stena Rederi Ab Method of mooring a ship and arrangement to accomplish the method
KR20150048167A (ko) * 2012-08-24 2015-05-06 스테나 레데리 에이비 선박의 계류 방법 및 그 방법을 성취하기 위한 장치
EP2888158A1 (fr) * 2012-08-24 2015-07-01 Stena Rederi AB Procédé d'amarrage de navire et agencement pour mettre en uvre le procédé
CN104781140A (zh) * 2012-08-24 2015-07-15 斯坦纳·雷德里公司 系泊船只的方法和实现这种方法的布置
US20150210361A1 (en) * 2012-08-24 2015-07-30 Stena Rederi Ab Method of Mooring a Ship and Arrangement to Accomplish the Method
KR102046438B1 (ko) 2012-08-24 2019-11-19 스테나 레데리 에이비 선박의 계류 방법 및 그 방법을 실행하기 위한 선박의 계류 장치
WO2014031061A1 (fr) * 2012-08-24 2014-02-27 Stena Rederi Ab Procédé d'amarrage de navire et agencement pour mettre en œuvre le procédé
EP2888158A4 (fr) * 2012-08-24 2016-08-03 Stena Rederi Ab Procédé d'amarrage de navire et agencement pour mettre en uvre le procédé
RU2601086C2 (ru) * 2012-08-24 2016-10-27 Штена Редери Аб Способ швартовки судна и устройство для осуществления этого способа
WO2014180687A1 (fr) * 2013-05-06 2014-11-13 Single Buoy Moorings Inc. Système de tourelle déconnectable de profondeur à configuration de colonne montante rigide de type "lazy wave"
US9797203B2 (en) 2013-05-06 2017-10-24 Single Buoy Moorings Inc. Deepwater disconnectable turret system with improved riser configuration
RU2657598C2 (ru) * 2013-05-06 2018-06-14 Сингл Бой Мурингс Инк. Глубоководная разъемная турельная система с пологоволновой конфигурацией жесткого райзера
CN103482025A (zh) * 2013-09-11 2014-01-01 中国海洋石油总公司 新型内转塔单点系泊装置
WO2015168632A3 (fr) * 2014-05-02 2016-05-06 Seahorse Equipment Corp Amarrage de tourelle de bouée à cage de tourelle poreuse
US9315241B2 (en) 2014-05-02 2016-04-19 Seahorse Equipment Corp Buoyant turret mooring with porous receptor cage
WO2018154182A1 (fr) 2017-02-24 2018-08-30 Aker Arctic Technology Oy Agencement pour structure marine, et structure marine
EP3437979A1 (fr) * 2017-07-31 2019-02-06 NOV APL Limited Barge de colonne montante d'accueil pour fpso
WO2019025936A1 (fr) * 2017-07-31 2019-02-07 NOV APL Limited Bouée d'amarrage funiculaire et système de production flottant
US10421523B2 (en) 2017-07-31 2019-09-24 NOV APL Limited Spread moored buoy and floating production system
CN112601697A (zh) * 2018-07-31 2021-04-02 索菲克股份有限公司 可拆卸的多点系泊和立管塔***及方法
CN109850070B (zh) * 2019-02-27 2020-01-31 武汉理工大学 基于可分离内转塔式系泊***的浮筒释放与回收***
CN109850070A (zh) * 2019-02-27 2019-06-07 武汉理工大学 基于可分离内转塔式系泊***的浮筒释放与回收***
WO2021259696A1 (fr) * 2020-06-22 2021-12-30 Cefront Technology As Système d'amarrage à étalement séparable
CN114655374A (zh) * 2022-03-07 2022-06-24 武汉理工大学 基于风能-波浪能联合发电和单点系泊的深远海养殖工船
CN114655374B (zh) * 2022-03-07 2023-10-24 武汉理工大学 基于风能-波浪能联合发电和单点系泊的深远海养殖工船
CN114537587A (zh) * 2022-03-21 2022-05-27 广州船舶及海洋工程设计研究院（中国船舶工业集团公司第六0五研究院） 用于系泊浮筒的连接解脱装置及海上浮式生产储油船
CN114537587B (zh) * 2022-03-21 2023-02-03 广州船舶及海洋工程设计研究院（中国船舶工业集团公司第六0五研究院） 用于系泊浮筒的连接解脱装置及海上浮式生产储油船

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