WO2011059343A1 - Plate-forme autoélévatrice et procédé mettant en oeuvre cette plate-forme élévatrice - Google Patents

Plate-forme autoélévatrice et procédé mettant en oeuvre cette plate-forme élévatrice Download PDF

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Publication number
WO2011059343A1
WO2011059343A1 PCT/NO2010/000412 NO2010000412W WO2011059343A1 WO 2011059343 A1 WO2011059343 A1 WO 2011059343A1 NO 2010000412 W NO2010000412 W NO 2010000412W WO 2011059343 A1 WO2011059343 A1 WO 2011059343A1
Authority
WO
WIPO (PCT)
Prior art keywords
legs
vessel
locking means
leg
grip
Prior art date
Application number
PCT/NO2010/000412
Other languages
English (en)
Inventor
Eyvind Larssen
Frode Berg Nilsen
Lars PØHNER
Rolf Bendiksen
Original Assignee
Aker Mh As
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 Aker Mh As filed Critical Aker Mh As
Publication of WO2011059343A1 publication Critical patent/WO2011059343A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0836—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks
    • E02B17/0872—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks with locking pins engaging holes or cam surfaces
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • E02B17/021—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0809—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering the equipment being hydraulically actuated

Definitions

  • the present invention relates to a method for jacking up a platform or vessel at sea, which platform or vessel is provided with a number of legs which can be lowered to secure contact with the bottom and where the platform furthermore can be jacked up along the legs to a working position where the platform is free of the influence of the waves.
  • a platform may, for example, be used for installation of structures at sea, such as, for example, wind power stations, foundations for wind power stations, other kinds of power stations which exploit sun, wind, currents or waves, or other kinds of projects at sea where there is a need for a platform which can be deployed securely on the bottom for a period of time.
  • the fact that the platform or vessel is jacked up on legs with secure contact with the bottom permits vessel movements such as pitch, roll and heave to be almost eliminated.
  • the platform or vessel may furthermore be provided with a crane for carrying out the tasks that are planned.
  • the actual platform may be a self-powered vessel arranged to be jacked up, it may be a barge or another kind of floating vessel provided with three or more legs for jacking up the platform.
  • the invention further comprises a hydraulic system and devices which can be employed together with the method for jacking up a platform of the said type.
  • the invention further relates to a type of locking bolt for connecting the hydraulic lifting system with the legs particularly in connection with the jacking process.
  • the invention further relates to a lubricating system for applying lubricant to several of the movable mechanical components in the hydraulic system with associated devices, particularly locking bolts and those parts which move at the platform's jack-up legs.
  • the invention particularly relates to a method, systems and devices in connection with a jack- up vessel or platform, which is designed to move quickly into an operative position and which can be quickly put into operation and subsequently quickly brought out of the operative position after the task in question has been completed.
  • a vessel will be capable of making effective use of a short weather window for operations, as opposed to heavy crane vessels etc. which take a long time to get into position and are more difficult to put into operation when the weather window is opportune.
  • the weather window is as short as 48-72 hours and it is therefore advantageous to develop a vessel for fast response. This places demands on the mobility of the vessel, but also demands on the system which has to jack the vessel or platform into an operative position.
  • the jack-up operation may also be conducted in several phases, where a preparatory phase is first implemented in which the legs are taken down to the seabed.
  • a preloading phase is often conducted where a small number of the legs, for example two of four legs, are pushed down, generally diagonally, into the seabed.
  • a preloading phase of this kind may also be carried out several times.
  • a jack-up phase is then conducted where the legs will sink down into the seabed to different degrees depending on the nature of the bottom. When the legs meet sufficiently high resistance, they will be secured and the vessel will be jacked up.
  • a jack-up vessel of this kind which can exploit a short weather window must, however, be capable of quickly carrying out the actual positioning process as well as jack-up, possibly with preloading etc.
  • Previously known solutions with jack-up platforms often employ triangular legs of built-up framework.
  • the present invention is based on the use of cylindrical legs, even though various other shapes may also be used.
  • the legs are provided with grip fasteners such as cut-outs, knobs or holes to enable the system and equipment, which have to move the legs in the vertical direction and jack up the vessel, to take a grip of the legs.
  • the grip fasteners are placed or arranged in a row in the vertical direction of each of the legs with a predetermined spacing between each of the grip fasteners. In different embodiments several parallel rows of grip fasteners may be placed or arranged along the leg's
  • a method for moving the legs in a vertical direction on a vessel with three or more legs as well as jacking up the vessel into an operative position.
  • the present invention is therefore a method for creating relative vertical movement between legs and vessel on a jack-up vessel for use at sea, which vessel is provided with three or more legs which are moved in the vertical direction relative to the vessel, which legs are provided with a number of grip fasteners in the legs' vertical dimension.
  • the method is characterised in that on the vessel a jack device is arranged at each leg, in which jack device there is provided a first and a second vertically movable lifting frame above each other in the longitudinal direction of the leg, which lifting frames are provided with activatable locking means which can engage with the grip fasteners on the legs, which lifting frames and locking means move in a pattern in order to create a relative vertical movement between legs and vessel.
  • the two lifting frames may move substantially simultaneously in opposite directions in the vertical direction and the locking means on the two frames alternate between being in engagement with a selection of the leg's grip fasteners.
  • the relative movement may be entirely simultaneous but this need not be the case. In other cases parts of the movement may be simultaneous and the speed may also be different.
  • the locking means' engagement with the legs' grip fasteners will overlap, with the result that one lifting frame's locking means engage with the leg's grip fasteners before the second lifting frame's locking means engage with the leg's grip fasteners.
  • the first lifting frame's locking means will disengage from the leg's grip fasteners, thereby ensuring that at least one locking frame is engaged with the leg's grip fasteners at any time.
  • the lifting frames will be able to be controlled in various ways where the two lifting frames may be individually movable or they may be controlled by a common control system.
  • the locking means may be activated by different factors such as, for example, where the locking means' activation is coordinated with the lifting frame's movement. Furthermore, the locking means' activation may be coordinated with the lifting frame's position or in relation to the lifting frame's position relative to the leg's grip fasteners.
  • the locking means may be designed so that the locking means on the first locking frame can become engaged before the locking means in the second frame are disengaged while the two locking frames are still moving relative to each other.
  • the locking frames' length of travel in the vertical direction along the leg may be equal to or greater than the distance between two succeeding grip fasteners on the legs.
  • a system is further provided for creating relative vertical movement between legs and vessel on a jack-up vessel for use at sea, which vessel is provided with three or more legs which are moved in the vertical direction relative to the vessel, which legs are provided with a number of grip fasteners in the legs' vertical dimension.
  • the system is characterised in that on the vessel a jack device is arranged at each leg, in which jack device there is provided a first and a second vertically movable lifting frame above each other in the longitudinal direction of the leg, which lifting frames are provided with activatable locking means which can engage with the grip fasteners on the legs, where each of the lifting frames is connected with an end of at least one linear motor, which linear motor is connected at the opposite end with the vessel, with the result that the linear motors move each of the lifting frames relative to the vessel.
  • the movement is in the vertical direction, or along the leg's extension and longitudinal direction.
  • the linear motors may be of different design but it is preferred that the linear motors are hydraulic linear motors. Furthermore, in an embodiment the stroke length of the linear motors is equal to or greater than the distance between two succeeding grip fasteners on the legs.
  • the locking means are in the form of cylinders or locking bolts, there could be a risk of one or more of the locking bolts becoming stuck during operation in a position where a locking bolt is in engagement with a grip fastener. For this reason a solution has been provided in accordance with the present invention where the locking means are releasably mounted on the lifting frame, thereby enabling the locking means to be released and replaced if necessary. This can be accomplished by the locking means' housing or attachment frame being releasably connected with the lifting frame, for example by bolt connection, placing it in a groove, flange connection or by other means.
  • a lubricating system is provided on the various movable parts, with the result that the locking means' movement in its housing or holder or frame is lubricated by the said lubricating system, where a pipe connection and pump are provided for bringing lubricant from a lubricant sump to the locations where the lubricant has to be applied.
  • the pump and any valves in connection with the pipe connection will preferably be controlled by a logic control such as a PLS or the like.
  • Figure 1 illustrates a vessel with four legs, which vessel can be jacked up by means of the present invention.
  • Figure 2 is a principle drawing of a jack device according to the invention.
  • Figures 3- 10 depict a work sequence for the jack device as illustrated in figure 2, according to the present invention.
  • Figure 1 illustrates a vessel 1 with four legs 2. The legs 2 are run through the vessel in a duct 4 in each corner. At each leg 2 there is provided a jack device 3 according to the present invention.
  • the legs 2 may be lifted into an upper position where the legs' lower end is at the bottom of the vessel (not shown). Furthermore, the legs can be lowered by means of the jack device 3 to a position approximately as shown in figure 1.
  • the legs 2 meet firm bottom the legs will cease moving downwards relative to the sea surface and instead the vessel will move upwards relative to the surface, whereupon the vessel is jacked up as a platform.
  • FIG. 2 illustrates in greater detail a jack device 3 according to the present invention.
  • a section of the vessel 1 is illustrated with a part of a leg 2 in a duct 4 through the vessel 1.
  • a jack device 3 is illustrated in greater detail where an upper (first) lifting frame 5 is placed round the leg 2.
  • the lifting frame 5 is connected with the vessel 1 via an upper linear motor 6, depicted here as a hydraulic cylinder, which cylinder can move the lifting frame 5 in a vertical direction along the leg's 2 longitudinal axis.
  • a lower (second) lifting frame 7 is also illustrated, which, like the lifting frame 5, is placed round the leg 2 and connected with the vessel 1 via a lower linear motor 8 which is also a hydraulic cylinder.
  • Both the lifting frames are provided with locking means 9 along their length
  • locking means 9, 1 1 are arranged and designed so as to enable them to engage with grip fasteners 10 on the legs' 2 circumference.
  • the grip fasteners 10 are illustrated here as openings in the leg 2.
  • Figures 3-10 further illustrate how the jack device 3 functions in a cycle.
  • Figure 3 illustrates a starting point where locking means 9 is engaged with the leg 2 in a grip fastener 10.
  • the lifting frame 5 is in the upper position and the lifting frame 7 is in the lower position.
  • Locking means 1 1 is disengaged from the leg 2.
  • the cylinder 6 moves the lifting frame 5 to the lower position and the leg 2 is pushed in the vertical direction relative to the vessel. This may mean that the vessel moves up if the leg 2 is securely fixed to the bottom or the leg 2 moves down in the water if it is not secured to the bottom.
  • the cylinder 8 moves the lifting frame 7 to the upper position.
  • the cylinder 6 moves the lifting frame 5 to the lower position and the leg 2 is pushed in the vertical direction relative to the vessel. This may mean that the vessel moves up if the leg 2 is securely fixed to the bottom or the leg 2 moves down in the water if it is not secured to the bottom.
  • the cylinder 8 moves the lifting frame 7 to the upper position. This is similar to the movement in figure 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Earth Drilling (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne un procédé de création d'un mouvement relatif vertical entre des pieds (2) et un navire sur un navire auto-élévateur en vue d'une utilisation en mer, ledit navire étant muni d'au moins trois pieds qui sont déplacés dans la direction verticale par rapport au navire, lesdits pieds étant munis d'un certain nombre de dispositifs de fixation (10) par serrage suivant la dimension verticale des pieds. L'invention concerne en outre un système destiné à créer un mouvement relatif vertical entre des pieds et un navire sur un navire auto-élévateur en vue d'une utilisation en mer, ledit navire étant muni d'au moins trois pieds qui sont déplacés dans la direction verticale par rapport au navire, lesdits pieds étant munis d'un certain nombre de dispositifs de fixation (10) dans la dimension verticale des pieds. Les dispositifs de fixation (10) sont montés sur des cadres élévateurs par des moyens de verrouillage (9), étant ainsi installés de manière mobile sur les pieds (2).
PCT/NO2010/000412 2009-11-13 2010-11-12 Plate-forme autoélévatrice et procédé mettant en oeuvre cette plate-forme élévatrice WO2011059343A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20093345A NO332855B1 (no) 2009-11-13 2009-11-13 Fremgangsmate for a jekke opp en plattform eller fartoy til havs
NO20093345 2009-11-13

Publications (1)

Publication Number Publication Date
WO2011059343A1 true WO2011059343A1 (fr) 2011-05-19

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PCT/NO2010/000412 WO2011059343A1 (fr) 2009-11-13 2010-11-12 Plate-forme autoélévatrice et procédé mettant en oeuvre cette plate-forme élévatrice

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Country Link
NO (1) NO332855B1 (fr)
WO (1) WO2011059343A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103938602A (zh) * 2014-03-21 2014-07-23 武汉船用机械有限责任公司 一种海洋平台的液压升降***的控制方法
CN107084784A (zh) * 2016-12-21 2017-08-22 中国船舶重工集团公司第七0研究所 一种移动式可升降四体船型水下测量平台

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954676A (en) * 1957-05-13 1960-10-04 Jersey Prod Res Co Lifting assembly for structures
GB1251571A (fr) * 1969-08-27 1971-10-27
US4007914A (en) * 1975-06-17 1977-02-15 Sutton John R Jacking mechanism
EP0024766A1 (fr) * 1979-08-24 1981-03-11 Gusto Engineering B.V. Barge ou plate-forme avec système élévateur flottante
US4655640A (en) * 1983-09-06 1987-04-07 Petroleum Structures, Inc. Advancing mechanism and system utilizing same for raising and lowering a work platform
US20050063787A1 (en) * 2001-04-16 2005-03-24 James Ingle Jack-up MODU and jacking method and apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954676A (en) * 1957-05-13 1960-10-04 Jersey Prod Res Co Lifting assembly for structures
GB1251571A (fr) * 1969-08-27 1971-10-27
US4007914A (en) * 1975-06-17 1977-02-15 Sutton John R Jacking mechanism
EP0024766A1 (fr) * 1979-08-24 1981-03-11 Gusto Engineering B.V. Barge ou plate-forme avec système élévateur flottante
US4655640A (en) * 1983-09-06 1987-04-07 Petroleum Structures, Inc. Advancing mechanism and system utilizing same for raising and lowering a work platform
US20050063787A1 (en) * 2001-04-16 2005-03-24 James Ingle Jack-up MODU and jacking method and apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103938602A (zh) * 2014-03-21 2014-07-23 武汉船用机械有限责任公司 一种海洋平台的液压升降***的控制方法
CN107084784A (zh) * 2016-12-21 2017-08-22 中国船舶重工集团公司第七0研究所 一种移动式可升降四体船型水下测量平台
CN107084784B (zh) * 2016-12-21 2019-08-23 中国船舶重工集团公司第七一0研究所 一种移动式可升降四体船型水下测量平台

Also Published As

Publication number Publication date
NO20093345A1 (no) 2011-05-16
NO332855B1 (no) 2013-01-21

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