WO1996035902A1 - Ameliorations concernant la pose de pipelines marins - Google Patents

Ameliorations concernant la pose de pipelines marins Download PDF

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Publication number
WO1996035902A1
WO1996035902A1 PCT/GB1995/001066 GB9501066W WO9635902A1 WO 1996035902 A1 WO1996035902 A1 WO 1996035902A1 GB 9501066 W GB9501066 W GB 9501066W WO 9635902 A1 WO9635902 A1 WO 9635902A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipeline
vessel
straightening
reel
assembly
Prior art date
Application number
PCT/GB1995/001066
Other languages
English (en)
Inventor
Stephen W. Davey
Robert George Martin
Original Assignee
Coflexip Stena Offshore Limited
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 Coflexip Stena Offshore Limited filed Critical Coflexip Stena Offshore Limited
Priority to PCT/GB1995/001066 priority Critical patent/WO1996035902A1/fr
Priority to BR9510582A priority patent/BR9510582A/pt
Priority to AU25288/95A priority patent/AU697153B2/en
Publication of WO1996035902A1 publication Critical patent/WO1996035902A1/fr
Priority to NO975133A priority patent/NO975133L/no

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/12—Laying or reclaiming pipes on or under water
    • F16L1/16—Laying or reclaiming pipes on or under water on the bottom
    • F16L1/18—Laying or reclaiming pipes on or under water on the bottom the pipes being S- or J-shaped and under tension during laying
    • F16L1/19—Laying or reclaiming pipes on or under water on the bottom the pipes being S- or J-shaped and under tension during laying the pipes being J-shaped
    • 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
    • B63B35/03—Pipe-laying vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/12—Laying or reclaiming pipes on or under water
    • F16L1/20—Accessories therefor, e.g. floats, weights
    • F16L1/202—Accessories therefor, e.g. floats, weights fixed on or to vessels
    • F16L1/203—Accessories therefor, e.g. floats, weights fixed on or to vessels the pipes being wound spirally prior to laying

Definitions

  • This invention relates to methods and apparatus for use in marine pipelaying. More specifically, but not exclusively, the invention relates to methods and apparatus whereby a conventional marine drilling vessel may be adapted to perform pipelaying operations.
  • the stovepiping method requires that skilled welders and their relatively bulky equipment accompany the pipelaying barge crew during the entire laying operation; all welding must be carried out on site and often under adverse weather conditions. Further, the stovepiping method is relatively slow, with experienced crews being able to lay only one or two miles of pipe a day. This makes the entire operation subject to weather conditions which can cause substantial delays and make working conditions quite harsh.
  • the other principal conventional method is the reel pipelaying technique.
  • a pipeline is wound on the hub of a reel mounted on the deck of a lay barge.
  • Pipe is generally spooled onto the reel at a shore base.
  • short lengths of pipe can be welded under protected and controlled conditions to form a continuous pipeline which is spooled onto the reel.
  • the lay barge is then towed to an offshore pipelaying location and the pipeline spooled off the reel between completion points.
  • the pipe which normally is plastically deformed during spooling onto the reel, has to be straightened as it is unspooled.
  • This method has a number of advantages over the stovepiping method, among them: speed (one to two miles per hour); lower operating costs (eg smaller welding crews and less welding equipment must be carried on the lay barge); and less weather dependency.
  • a method of marine pipelaying of the type in which the pipeline to be laid is wound upon a reel carried by a vessel and is unspooled from said reel as the pipeline is laid from said vessel, comprising the steps of: feeding said pipeline from said reel over a bending shoe vertically spaced above the deck of said vessel and downwardly therefrom into a straightening and clamping assembly disposed below said bending shoe; said straightening and clamping assembly being adapted for vertical movement along said pipeline between an uppermost position adjacent said bending shoe and a lowermost position adjacent said deck, being further adapted to straighten said pipe by movement of the assembly along the length of the pipeline, and being further adapted to releasably clamp said pipeline; clamping said straightening assembly to the leading end of said pipeline, whilst said straightening assembly is in its uppermost position;
  • said bending shoe is mounted on a derrick structure extending above said deck.
  • said straightening assembly is suspended from said derrick structure.
  • said derrick structure is disposed above a moonpool formed in said vessel and said pipeline enters the water via said moonpool.
  • said reel is a vertical reel, mounted for rotation about a horizontal axis, and said pipeline is unspooled from the bottom of said spool such that the feeding of said pipeline about said bending shoe causes reverse bending of said pipeline.
  • said vessel is a drilling vessel
  • said derrick assembly is the existing derrick of the drilling vessel.
  • said reel, said bending shoe and said straightening assembly are removably mounted on the vessel.
  • said straightening assembly is suspended from an existing crane hook of said derrick and is moved between said upper and lower positions by operation of said crane hook.
  • pipelaying apparatus for use in pipelaying operations of the type in which the pipeline to be laid is wound upon a reel carried by a vessel and is unspooled from said reel as the pipeline is laid from said vessel, comprising: a reel adapted for mounting on said vessel for storing the pipeline to be laid; a pipeline bending shoe adapted to be mounted at a vertical distance above the deck of said vessel; and pipeline straightening means adapted to be mounted below said bending shoe for vertical movement between an uppermost position adjacent said bending shoe and a lowermost position adjacent said deck, being further adapted to straighten said pipe by movement of the assembly along the length of the pipeline, and being further adapted to releasably clamp said pipeline.
  • said vessel is a drilling vessel including a derrick structure located above a moonpool, said bending shoe being adapted to be mounted on said derrick structure.
  • said derrick structure includes vertically travelling crane means, and said straightening means is adapted to be suspended from said crane means for vertical movement with said crane means.
  • the apparatus further includes a pipeline clamp adapted to be located below the lowermost position of said straightening means, a pipeline abandonment and recovery winch, and a tugger winch for use in initially feeding the end of the pipeline from the reel, over the bending shoe and through the straightening means.
  • a pipeline clamp adapted to be located below the lowermost position of said straightening means, a pipeline abandonment and recovery winch, and a tugger winch for use in initially feeding the end of the pipeline from the reel, over the bending shoe and through the straightening means.
  • said reel is adapted for rotation about a horizontal axis.
  • a marine pipelaying vessel comprising a vessel having a derrick structure located above a moonpool, said vessel being adapted for pipelaying operations by the provision thereon of a pipeline storage reel and of pipe diverting and straightening means mounted on said derrick structure, whereby pipe from said reel may be laid via said moonpool.
  • a method of marine pipelaying comprising adapting a vessel having a derrick structure located above a moonpool for pipelaying operations by the provision thereon of a pipeline storage reel and of pipe diverting and straightening means mounted on said derrick structure, and feeding the pipeline from said storage reel via said diverting means through said straightening means, said pipeline exiting said vessel via said moonpool.
  • Fig.l is a partial side view of a drilling vessel equipped with pipelaying apparatus in accordance with the present invention
  • Fig.2 is a partial plan view of the vessel of Fig.l
  • Figs.3(a) to 3(f) are a sequence of side views of the vessel of Fig.l illustrating the method of use of the pipelaying apparatus in accordance with the invention
  • Fig.4 is a further partial side view of the vessel of Fig.l indicating different pipeline departure angles for a given bend radius
  • Fig.5 is a plan view showing the base and crown of a derrick structure forming part of the vessel of Figs.l to 4
  • Figs.6(a) to (c) are side views of the derrick structure of Fig.5 in the directions A-A, B-B and C-C thereof respectively.
  • a conventional drilling vessel 10 equipped with a derrick structure 12 located above a moonpool 14.
  • the derrick 12 is itself equipped with a vertically travelling crane hook assembly 16.
  • the derrick 12, moonpool 14 and crane 16 would normally be used in conventional drilling operations undertaken by the vessel 10.
  • the vessel 10 is adapted to perform pipelaying operations by the addition of a pipe storage reel 18, upon which a pipeline to be laid is spooled, mounted on the deck of the vessel astern of the derrick 14; a bending shoe assembly 20 mounted on the derrick 12 at a distance above the deck of the vessel; and a pipeline straightening assembly 22 suspended from the crane hook 16 beneath the bending shoe 20. Operation of the crane allows the straightening assembly to travel vertically between an uppermost position adjacent the bending shoe 20 and a lowermost position adjacent the deck of the vessel.
  • the reel 18 is preferably of the "portable" type, which can be loaded with pipe onshore before being lifted onto the vessel.
  • Various portable reels of this type are known for use in other pipelaying systems, for example from US Patents Nos. 3,855,835, 4,157,023, 4,243,345 and 4,260,287.
  • the vessel may carry one or more additional reels 18a., according to the available deck space and load capacity, allowing a greater length of pipeline to be carried and laid.
  • the bending shoe 20 performs a substantially similar function to the "radius controller" of the above referenced US Patents Nos. 4,230,421, 4,269,540, 4,297,054, 4,340,322 and 4,345,855; i.e. diverting the pipe as it is unspooled from the reel 18 for presentation to the straightening assembly 22, and at the same time reverse bending the pipeline to a relatively uniform radius of curvature so as to facilitate subsequent straightening.
  • the bending shoe provides an arcuate path about which the pipe is bent in being fed to the straightening assembly.
  • the pipe bearing surface of the shoe is normally provided with rollers or a conveyor-belt type track arrangement, which may be formed with a transverse sectional profile for centring the pipeline thereon as is well known in the art.
  • the pipeline is preferably fed from the bottom of the reel as shown, such that it is bent in the reverse direction to the curvature imparted to it by being spooled on the reel 18.
  • the bending shoe 22 preferably provides an arcuate surface of approximately 240 degrees.
  • the shoe preferably comprises a plurality of arcuate segments which together make up the required arc length, each segment being fitted with its own pipe transporting conveyor or rollers (not shown) .
  • the radius of the arc of the shoe will depend upon the characteristics of the maximum size of pipe which is to be laid. For 6 inch diameter pipe, a radius of about 3.5 metres will be required.
  • the straightening assembly 22 comprises a three-point straightener, preferably a roller assembly of a type which is known in the art.
  • Three-point straightening of pipelines is discussed in US Patents Nos.3,237,438 and 3,372,461.
  • Examples of roller-type straighteners of the generally preferred type, and their operation, are described in the above referenced US Patents Nos. 3,855,835, 4,157,023, 4,243,345 and 4,260,287.
  • Alternative "roller-track" type assemblies are also described in above referenced US Patents Nos. 4,230,421, 4,269,540, 4,297,054, 4,340,322 and 4,345,855, and further in US Patents Nos. 3,641,778, 3,680,342, Re 30,846 and 4,723,874.
  • the rollers of the assembly 22 are movable between an open position in which they are disengaged from the pipe and a closed position in which they are in contact with the pipe, and are disposed relative to one another and to the pipe so as to straighten the pipe by reverse bending through movement of the straightener along the length of the pipe, in accordance with principles which are well known in the art.
  • straightening takes place by holding the straightener stationary while the pipe is pulled therethrough.
  • the straightener is moved vertically along a length of pipeline whilst the pipeline is held stationary.
  • the straightening assembly 22 is also adapted to be clamped to the pipeline either by engagement of the rollers thereof or by means of a separate clamp incorporated in the assembly. Clamping arrangements of this type are known in the art and will not be described in further detail herein.
  • a work platform 23 may also be provided on the derrick 12, affording access to the straightening assembly 22.
  • the platform may be enclosed if required.
  • the pipelaying equipment fitted to the vessel also includes a pipeline clamp 24, an abandonment and recovery (A&R) winch 26, and a tugger winch 28.
  • A&R abandonment and recovery
  • a tugger cable 30 is fed from the tugger winch 28, through the clamp 24 and straightening assembly 22, and around the bending shoe 20 for attachment to the free end of the pipeline 32 emerging from the reel 18 (Fig. 3(a)).
  • the tugger winch 28 is then operated to pull the cable 30 and pipeline over the bending shoe 20, and through the straightener 22 until the pipeline 32 protrudes approximately 5 metres below the straightener 22, at which point the tugger cable 30 is disconnected (Fig. 3(b)).
  • the straightener 22 is clamped to the pipeline 32 and is lowered to its lowermost position, where it is clamped by the pipeline clamp 24, and an initiation cable 34 is attached (Fig. 3(c)).
  • the straightener 22 is then undamped from the pipeline 32, is closed and is returned to its uppermost position, thereby straightening the length of pipe extending between the uppermost and lowermost positions (typically a length of about 24 metres) (Fig. 3(d)).
  • the clamp 24 is released, the straightener 22 is again clamped to the pipeline 32 and lowered therewith to its lowermost position, the clamp 24 re-engages the pipeline 32, the straightener 22 is undamped, closed and returned to its uppermost position to straighten the next length of pipe.
  • a stinger assembly 40 may be fitted to the bottom of the vessel so as to divert the pipeline to the required angle as it exits the bottom of the moonpool 14.
  • the use of stingers in controlling the launch angle in pipelaying operations is well known in the art and will not be discussed further herein.
  • Fig. 4 illustrates a range of departure angles for a given bending radius, showing how the length of the required stinger 40 would increase as the launch angle becomes smaller.
  • An angle of 70 degrees is likely to be suitable for a typical range of operations, requiring a stinger approximately 20 metres in length, extending downwards from the interior of the moonpool 14 immediately below the pipeline clamp 24.
  • the method of pipeline straightening described herein straightens the pipe in a piecewise manner, a given length of pipe being straightened in each cycle, rather than in a continuous manner as in systems where the straightener remains stationary and the pipeline is fed continuously therethrough.
  • this piecewise mode of straightening may require the forward speed of the vessel to be varied in synchronism with the cycling of the straightener.
  • the length of pipe between the vessel and the sea bed will sufficient to accommodate the slack produced by the piecewise unspooling of the pipe from the reel, so that the vessel may proceed along the pipelay path at substantially constant speed.
  • the invention thus provides methods and apparatus allowing pipelaying operations to be conducted at relatively low cost, particularly where a drilling vessel is employed and the existing derrick, crane etc. of the vessel are exploited.

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

Abstract

Procédés et appareils destinés aux opérations de pose de pipelines marins, dans lesquelles le pipeline à poser part d'une bobine de stockage (18), passe sur un sabot de cintrage (20) monté sur une structure de derrick (12) située au-dessus d'un puits central (14), puis sur un ensemble de redressage (22) suspendu à la structure de derrick (12) et est plongé dans l'eau par ledit puits central (14). Pour redresser ledit pipeline, une longueur provenant de la bobine est serrée par l'ensemble de redressage et ce dernier est déplacé vers le haut sur une longueur dudit pipeline qui s'étend entre le sabot de cintrage et le puits central. Ledit système est destiné à être utilisé sur un navire de forage qui peut être temporairement converti pour poser des pipelines.
PCT/GB1995/001066 1995-05-10 1995-05-10 Ameliorations concernant la pose de pipelines marins WO1996035902A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/GB1995/001066 WO1996035902A1 (fr) 1995-05-10 1995-05-10 Ameliorations concernant la pose de pipelines marins
BR9510582A BR9510582A (pt) 1995-05-10 1995-05-10 Processo de colocação de tubulação marítima aparelho e embarcação de colocação de tubulação marítima
AU25288/95A AU697153B2 (en) 1995-05-10 1995-05-10 Improvements in or relating to marine pipelaying
NO975133A NO975133L (no) 1995-05-10 1997-11-07 Marin rörlegging

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB1995/001066 WO1996035902A1 (fr) 1995-05-10 1995-05-10 Ameliorations concernant la pose de pipelines marins

Publications (1)

Publication Number Publication Date
WO1996035902A1 true WO1996035902A1 (fr) 1996-11-14

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ID=10768266

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/001066 WO1996035902A1 (fr) 1995-05-10 1995-05-10 Ameliorations concernant la pose de pipelines marins

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AU (1) AU697153B2 (fr)
WO (1) WO1996035902A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU701892B2 (en) * 1994-12-16 1999-02-11 Stolt Comex Seaway As Combined apparatus for handling modules and tools and laying of elongated flexible articles from a vessel supported on a body of water
WO2001038768A1 (fr) 1999-11-29 2001-05-31 Ihc Gusto Engineering B.V. Systeme de pose de tubes avec compensateur de tension
WO2003019061A1 (fr) * 2001-08-22 2003-03-06 Rockwater Limited Dispositif destine a la pose de conduites sur le fond marin depuis un vaisseau flottant
US7226244B1 (en) 2002-08-19 2007-06-05 Itrec B.V. System for overload protection for pipe or cable laying structures
EP2273169A2 (fr) 2009-07-09 2011-01-12 IHC Engineering Business Limited Appareil de contrôle de la tension et procédé
WO2019115438A1 (fr) * 2017-12-12 2019-06-20 Shanghai Zhenhua Heavy Industries Co., Ltd Fabrication embarquée d'ensembles tuyau-dans-tuyau

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991015699A1 (fr) * 1990-03-30 1991-10-17 Coflexip Dispositif et procede pour deroulement sensiblement vertical des conduites tubulaires flexibles
WO1993006401A1 (fr) * 1991-09-25 1993-04-01 Stena Offshore Limited Rampe de pose de tuyaux en mer
GB2283554A (en) * 1993-10-30 1995-05-10 Stena Offshore Ltd Marine pipelaying

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991015699A1 (fr) * 1990-03-30 1991-10-17 Coflexip Dispositif et procede pour deroulement sensiblement vertical des conduites tubulaires flexibles
WO1993006401A1 (fr) * 1991-09-25 1993-04-01 Stena Offshore Limited Rampe de pose de tuyaux en mer
GB2283554A (en) * 1993-10-30 1995-05-10 Stena Offshore Ltd Marine pipelaying

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU701892B2 (en) * 1994-12-16 1999-02-11 Stolt Comex Seaway As Combined apparatus for handling modules and tools and laying of elongated flexible articles from a vessel supported on a body of water
WO2001038768A1 (fr) 1999-11-29 2001-05-31 Ihc Gusto Engineering B.V. Systeme de pose de tubes avec compensateur de tension
WO2003019061A1 (fr) * 2001-08-22 2003-03-06 Rockwater Limited Dispositif destine a la pose de conduites sur le fond marin depuis un vaisseau flottant
US7226244B1 (en) 2002-08-19 2007-06-05 Itrec B.V. System for overload protection for pipe or cable laying structures
EP2273169A2 (fr) 2009-07-09 2011-01-12 IHC Engineering Business Limited Appareil de contrôle de la tension et procédé
WO2019115438A1 (fr) * 2017-12-12 2019-06-20 Shanghai Zhenhua Heavy Industries Co., Ltd Fabrication embarquée d'ensembles tuyau-dans-tuyau
CN111629960A (zh) * 2017-12-12 2020-09-04 上海振华重工(集团)股份有限公司 管中管组件的船上制作
RU2741160C1 (ru) * 2017-12-12 2021-01-22 Шанхай Чжэньхуа Хэви Индастриз Ко., Лтд. Способ изготовления узлов "труба-в-трубе" на борту судна
US11267542B2 (en) 2017-12-12 2022-03-08 Shanghai Zhenhua Heavy Industries Co., Ltd. On-board fabrication of pipe-in-pipe assemblies

Also Published As

Publication number Publication date
AU697153B2 (en) 1998-10-01
AU2528895A (en) 1996-11-29

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