WO2010002268A1 - Dispositif d'élévation pour une installation flottante - Google Patents

Dispositif d'élévation pour une installation flottante Download PDF

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Publication number
WO2010002268A1
WO2010002268A1 PCT/NO2009/000240 NO2009000240W WO2010002268A1 WO 2010002268 A1 WO2010002268 A1 WO 2010002268A1 NO 2009000240 W NO2009000240 W NO 2009000240W WO 2010002268 A1 WO2010002268 A1 WO 2010002268A1
Authority
WO
WIPO (PCT)
Prior art keywords
lifting
wire
lifting device
hydraulic cylinder
seabed
Prior art date
Application number
PCT/NO2009/000240
Other languages
English (en)
Inventor
Kenneth Skinnes
Original Assignee
Drillco 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 Drillco As filed Critical Drillco As
Publication of WO2010002268A1 publication Critical patent/WO2010002268A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0007—Equipment or details not covered by groups E21B15/00 - E21B40/00 for underwater installations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/02—Devices for facilitating retrieval of floating objects, e.g. for recovering crafts from water
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/08—Underwater guide bases, e.g. drilling templates; Levelling thereof

Definitions

  • the invention relates to a lifting device arranged at an upper portion of a long tensile strong body, which with a lower portion is connected to a seabed or a subsea structure, and in an upper portion is clamped in a floating installation, more particularly in that a fall block system arranged on a vertical hydraulic cylinder is fastened to an upper portion of a riser, a drill string or a constant tension wire, and a lifting wire arranges on a lifting arrangement, typically a winch, runs over the fall blocks, as there at an upper wire inlet is arranged a gripper device arranged to releasably grip about the lifting wire and prevent the lifting wire from running through the fall blocks, whereby a vertical movement by a lifting object may be carried out by the hydraulic cyl- inder contracting or extending the fall blocks taking up or paying out lifting wire, thereby moving the lifting object without influence from the heave movement of the floating installation.
  • riser is in this context meant any tubular connected to the seabed or a borehole and extending up from the seabed exhibiting a fixed length.
  • riser sea riser
  • the object of the invention is to remedy or reduce at least one of the prior art drawbacks .
  • the invention provides a lifting device fastened to a stretched body extending between the seabed and a floating installation such as a riser extending from a wellhead for a well provided for oil or gas production and up to the lower edge of the floating installation, a drill string extending between a borehole and a drilling machine on the floating installation, or a constant tension wire anchored in the seabed and extending up to a constant tension wire winch on the floating installation.
  • the lifting device comprises a hydraulic cylinder fastened to the stretched body and arranged substantially parallel to said mounted body and provided with a wire block in each end portion. Further led over said wire block is a lifting wire tied to a hoisting drum and provided to extend between the hoisting drum and a lifting object to be moved vertically under the floating installation.
  • a lifting wire lock arranged for releasable connection to the lifting wire is arranged over the hydraulic cylinder and pro- vided to rest against a portion of the hydraulic cylinder to thereby be able to prevent further lengths of lifting wire to be drawn through the lifting device, but be locked to the lifting device.
  • the lifting device When the lifting wire extends from the hoisting drum via the lifting device and downwards to the seabed to lift objects, which for example are to be interconnected with a seabed installation of be removed therefrom, the lifting device will, as the object is to be moved over a distance near the seabed, be able to carry out this part of the lifting operation by the lifting wire lock of the lifting device being connected to the lifting wire being attached to the floating installation and moving at least partly in line with its heave motion caused by waves on the sea surface.
  • the lifting wire and the lifting object are thereby suspended from the lifting device which is fixed at a certain height above the seabed and not influenced by wave induced heave motion, and the lifting operation may be performed with great precision by the hydraulic cylinder contracting for controlled lowering of the lifting object, or extending for controlled lifting of the lifting object.
  • the lifting wire lock is connected to the lifting wire and, hung off in the lifting direction when the distance from the object to the seabed or the installation to which the object shall be connected is inside the lifting height of the lifting device, typically about 5 metres, while locking at lifting takes place before the lifting is started, as the lifting device according to the invention is utilised for lifts over the first distance unto a safe distance, typically about 5 metres, is reached.
  • the lifting wire lock may be a guide surrounding the lifting wire throughout the lifting operation and which is arranged to be releasably fastened to the lifting wire at said interconnection.
  • remedies pulling the lifting object sideways in the whole or in part of the lifting operation may be utilised, possibly one or more guides, possibly, when the lifting device is fastened to a constant tension wire, that the constant tension wire is slopingly mounted.
  • the invention relates more specifically to a device for a lifting arrangement for a floating installation being connected to an upper portion of a long, tensile strong body, which with a lower portion is connected to a seabed or a sub- sea structure, and in the upper portion is fastened to the floating installation, characterised in that: a hydraulic cylinder is fastened to the body, as the hydraulic cylinder longitudinal axis is substantially parallel to the body's longitudinal axis; - the hydraulic cylinder is in each end portion provided with a wire block arranged for slidable and repeated conveyance of a lifting wire extending from the floating installa- tion and down toward the seabed alternating over the upper and the lower wire block; and a gripper device is arranged for releasable connection to a portion of the lifting wire at the inlet to the upper wire block and to abutment against a portion of the lifting device to thereby be able to suspend the lifting wire in the lifting device.
  • the wire blocks may constitute a multiple tackle.
  • the long tensile strong body may be a riser fastened at a wellhead, a drill string extending downwards in a borehole, or a wire anchored in the seabed.
  • the gripper device may be provided with a remote controlled closing mechanism.
  • the gripper device may form a guiding device enclosing the lifting wire cross-section.
  • the hydraulic cylinder may be arranged suspended from a frame having a piston rod end facing downwards.
  • the hydraulic cylinder may be suspended pivotal about a substantially vertical pivot axis.
  • the hydraulic cylinder pivot axis may be substantially coincident with the hydraulic cylinder central axis.
  • the frame may abut supportingly against a portion of the hydraulic cylinder.
  • the frame may form a support bearing about the hydraulic cyl- inder.
  • the frame may be releasably fastened to • a riser fixation ring, as an alternative to a drill string, as an alternative to a constant tension wire.
  • a lifting wire guide may be arranged remotely from the hydraulic cylinder central axis and be movable in a plane which is substantially perpendicular to the longitudinal direction of the lifting wire.
  • Fig. 1 shows a principle sketch of a field installation including a well with a wellhead connected to a floating platform via a riser, as an object is lowered down toward the wellhead and is pulled sideways by a positioning winch;
  • Fig. 2 shows in perspective and larger scale a lifting device according to the invention, fastened to an up- per end portion of the riser;
  • Fig. 3 shows a side view of the lifting device according to the invention.
  • Fig. 4 shows a principle sketch of a field installation comprising a floating platform connected to a sea- bed installation via a slanted constant tension wire extending from a constant tension winch.
  • the reference numeral 1 indicates a lifting device according to the invention.
  • the lifting device 1 being arranged on a first, upper end portion 21 of a per se known riser 2 which with a second end portion rests on an installation on a seabed 3, for example a wellhead 31.
  • the riser extends between the seabed 3 and a floating installation 5, shown here as a submersible platform.
  • the floating installa- tion 5 is provided with a means for relocation of objects 32 between the floating installation 5 and the seabed 3 or the installation 22 on the seabed 3, typically including a hoisting winch 41 connected to a lifting wire 4.
  • Lifting opera- tions concerning objects 32 which are positioned or are to be positioned near the wellhead 31, will take place by the lifting wire 4 moving the object near the riser 2.
  • the riser 2 is suspended from the floating installation 5 via per se known so-called heave compensators 24, herein shown schematically, for maintenance of tension in the riser 2 during vertical movements of the floating installation 5 caused by waves and varying load on board the installation 5.
  • the upper end portion 21 of the riser 2 is provided with a fastening ring 211 for interconnection of the riser and the heave compensator 24.
  • From the upper end portion of the riser 2 extends, according to per se known art, a telescopic unit 23 up to the deck of the floating installation 5 so that a continuous pipe run is formed between the wellhead 31 and the floating installation 5.
  • a positioning means 34 shown schematically herein as a positioning winch 341 fastened to the seabed 3 and provided with a positioning wire 342 arranged to be able to pull the lifting object 32 sideways away from the riser 2 during the whole or part of the lifting operation.
  • FIG 4 is shown the lifting device 1 fastened to a constant tension wire 61 extending from a constant tension winch 6 to a seabed installation 62, which in its simplest form may be a bottom anchor, a foundation or the like, sufficiently fastened to the seabed or having sufficient weight to be able to maintain a stable anchorage for the constant tension wire 61 when the constant tension winch 6 maintains a prescribed tension in the constant tension wire 61 during the heave motion of the floating installation 5 and the use of the lift- ing device 1.
  • the constant tension wire 61 is for the purpose installed slanted to achieve sufficient distance between the lifting object 32 and the constant tension wire 61.
  • the lifting device 1 is provided with a hydraulic cylinder 11 arranged vertically and having a cylinder bottom end 112 fac- ing upwards, as a fastener is arranged for suspending the hydraulic cylinder 11 in a frame 14 provided with fastening means 142 for releasable fastening to lugs 211a on the riser fastening ring 211.
  • the frame 14 is provided with means (not shown) for releasable fastening and supporting of the lifting device 1 to a portion of the constant tension wire 61.
  • the constant tension wire 61 is supported in a tension wire sup- port 63 below the lifting device 1, as the tension wire support 63 is fastened to a cellar deck 51 of the floating installation 5.
  • the hydraulic cylinder 11 is provided with an upper wire block 12a fastened at the cylinder bottom end plate, and a lower wire block 12b fastened to a piston rod portion 113 extending out from a piston rod end plate 111 on the hydraulic cylinder 11.
  • Each wire block 12a, 12b is multiple tackled, i.e. having multiple wire sheaves 121 arranged concentrically and side-by-side.
  • the lifting device 1 is provided with a wire guide 13 extending from the hydraulic cylinder 11 as on an extending arm 131 and rigidly connected to the hydraulic cylinder 11 a wire sheave is rotatably arranged.
  • the hydraulic cylinder 11 is suspended rotatably about a vertical axis, whereby the wire guide 13 may be moved in a sector.
  • the lifting wire 4 is led repeatedly alternating over the upper and lower wire blocks 12a, 12b and in the end over the sheave 132 of the wire guide 13 before the lifting wire is led downward toward the seabed 3.
  • the lifting device 1 thus forms an exchange transmission like a multiple tackle.
  • the lifting device 1 is shown having fourfold encircling of the lifting wire 4 about the hydraulic cylinder 11. It is thereby achieved that the lifting device 1 by movement of the hydraulic cylinder 11 from completely contracted to completely extended accumulates a length of wire, which is eight times the stroke of the cylinder 11. By contraction, the lifting device 1 pays out equivalentIy.
  • a lifting wire lock 15 is provided immediately above the upper wire block 12a.
  • the lifting wire lock 15 is arranged to be able to grip releas- ably around the lifting wire 4 and to hold the lifting wire in a firm grip.
  • the lifting wire lock 15 abuts supportively against the frame 14. Operation of the lifting wire lock 15 may be by direct operation of a control (not shown) or by re- mote operation (not shown) .
  • the lifting wire lock 15 is arranged vertically movable in relation to the hydraulic cylinder 11 frame 14 so that the lifting wire lock 15 may be positioned vertically movable and at a distance from the frame 14 before the lifting wire lock 15 is fastened to the lifting wire 4. This may be favourable with a view to reducing risk of damage to the lifting wire 4 when this is moving due to the heave motion of the floating installation 5.
  • the lifting wire lock 15 may advantageously also be provided with arrangements (not shown) for damping of the impact against the frame 14.
  • the frame 14 is provided with a support bearing 141 surrounding a portion of the hydraulic cylinder 11.
  • the frame 14 is also provided with an adjustable abutment 143 for supporting the frame 14 against the riser 21.
  • the lifting device 1 of the invention When the lifting device 1 of the invention is used in an operation where the object 32 is to be set on the wellhead 31 or the seabed 3 or another area, which is not moving in line with the heave motion of the floating installation, the object is lowered to a safe, vertical distance from the receiv- i5 ing locality.
  • the safe distance must lie within the vertical motion range of the lifting device determined by the stroke of the hydraulic cylinder 11 and the number of sheaves 121 in the upper and lower wire blocks 12a, 12b.
  • the lifting wire lock 15 including the lifted object 32 is thereby suspended from the lifting device 1.
  • the lifted object 32 is then lowered to the receiving locality 3, 31 without being influenced by the heave motion of the floating in-
  • the hydraulic cylinder 11 When lifting an object 32 from the seabed 3 or the wellhead 31 or another area not moving in line with the heave motion of the floating installation 5, the hydraulic cylinder 11 is 30 contracted to accumulate as little as possible of the lifting wire 4. So much of the lifting wire 4 is fed out from the hoisting drum 41 that the heave motion of the floating installation 5 does not cause movement of the lifted object 32, but where the slack in the lifting wire is taken up until a safe limit set from existing heave motion. Subsequently the lifting wire lock 15 is made fast to the lifting wire 4. Subsequently the hydraulic cylinder 11 is pushed out and the lifted object 32 is pulled up from the base 3, 31 to a safe distance before the hoisting drum 41 takes over the lifting operation and the lifting wire lock 15 is disconnected from the lifting wire 4.
  • the constant tension wire 61 is lowered until the end is 5 m above the seabed installation 62.
  • the lifting device 1 is connected to the constant tension wire 61 at a suitable height over the cellar deck 51.
  • the lifted object 32 which shall be landed is lowered by the lifting wire 4 until 10 m above final landing level while the hydraulic cylinder 11 is in the contracted condition.
  • the lifting wire lock 15 is connected to the lifting wire 4, and the weight of the lifted object 32 is transferred to the lifting device 1 and the constant tension wire 61.
  • the lifting wire 4 between the lifting wire lock 15 and the hoisting drum 41 is held unloaded.
  • the hydraulic cylinder 11 is moved from the contracted to the extended condition and lifts the lifted object 5 metres up.
  • the constant tension winch 6 pays out the constant tension wire 61, which is fastened to the seabed installation 62.
  • the lifted object 32 is now positioned 5 m above landing level.
  • the constant tension wire 61 is tightened using the con- stant tension winch 6, which in a per se known way compensates for the heave motion of the floating installation 5.
  • the lifting device 1 lowers the lifted object 32 by contracting the hydraulic cylinder 11.
  • Raising a lifted object 32 may be carried out in this way.
  • the constant tension wire 61 is lowered to 5 m above the seabed installation 62.
  • the lifting device 1 is connected to the constant tension wire 61 at a suitable height above the cellar deck 51.
  • the hoisting drum 41 lowers the lifting wire 4 to 10 m above the seabed installation 62 with the hydraulic cylinder 11 fully extended.
  • the lifting device 1 lifting wire lock 15 is connected to the lifting wire 4, and the lifting device 1 carries that part of the lifting wire 4, which extends downward from the lifting wire lock 15.
  • the lifting wire 4 between the lifting wire lock 15 and the hoisting drum 41 is held unloaded.
  • the constant tension winch 6 pays out the constant tension wire 61, which is fastened to the seabed installation 62.
  • the end of the lifting wire 4 is now positioned 5 m above the seabed installation 62.
  • the constant tension wire 61 is tightened up by the constant tension winch 6, which in a per se known way compensates for the heave motion of the floating installation 5.
  • the hydraulic cylinder 11 is contracted and lowers the lifting wire for connection to the lifted object 32.
  • the hydraulic cylinder 11 is extended.
  • the lifted object 32 is raised without being affected by the heave motion of the floating installation 5.
  • the hoisting drum 41 tensions the lifting wire 4 so that the lifting wire lock 15 is unloaded and may be disconnected from the lifting wire 4.
  • the lifted object 32 is raised to the surface .

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention porte sur un dispositif d'élévation (1) sur une installation flottante (5) qui est reliée à une partie supérieure (21) d'un corps long résistant à la traction (2) qui est, avec une partie inférieure (22), relié à un fond marin (3) ou une structure immergée (31, 33, 62) et, dans la partie supérieure (21), est fixé à l'installation flottante (5), un vérin hydraulique (11) étant fixé au corps (2) et comportant, dans chaque partie d'extrémité (111, 112), un bloc de câbles à multiples poulies (12a, 12b) agencé pour un transport coulissable et répété d'un câble d'élévation (4) s'étendant à partir de l'installation flottante (5) et vers le bas en direction du fond marin (3), alternant sur des blocs de câbles supérieur et inférieur (12a, 12b), et également un dispositif de préhension (15) agencé pour une liaison libérable à une partie du câble d'élévation (4) au niveau de l'entrée vers le bloc de câbles supérieur (12a) et en butée contre une partie (14) du dispositif d'élévation (1) pour ainsi être capable de suspendre le câble d'élévation (4) dans le dispositif d'élévation (1).
PCT/NO2009/000240 2008-06-30 2009-06-30 Dispositif d'élévation pour une installation flottante WO2010002268A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20082892A NO332075B1 (no) 2008-06-30 2008-06-30 Lofteinnretning for en flytende installasjon
NO20082892 2008-06-30

Publications (1)

Publication Number Publication Date
WO2010002268A1 true WO2010002268A1 (fr) 2010-01-07

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ID=41466161

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2009/000240 WO2010002268A1 (fr) 2008-06-30 2009-06-30 Dispositif d'élévation pour une installation flottante

Country Status (2)

Country Link
NO (1) NO332075B1 (fr)
WO (1) WO2010002268A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102225734A (zh) * 2011-05-26 2011-10-26 中国海洋石油总公司 深水绞车下放安装用主动升沉补偿装置
EP2801517A1 (fr) * 2013-05-06 2014-11-12 Siemens Aktiengesellschaft Appareil de manipulation de module sous-marin

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176722A (en) * 1978-03-15 1979-12-04 Global Marine, Inc. Marine riser system with dual purpose lift and heave compensator mechanism
GB2187159A (en) * 1986-03-03 1987-09-03 Nl Industries Inc Improvements relating to apparatus for supporting and manipulating objects
JPH0464686A (ja) * 1990-07-03 1992-02-28 Masato Ohori 基礎装置の長柄軸昇降装置
US20050189118A1 (en) * 2004-02-26 2005-09-01 Moncus James D. Swing arm crane and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176722A (en) * 1978-03-15 1979-12-04 Global Marine, Inc. Marine riser system with dual purpose lift and heave compensator mechanism
GB2187159A (en) * 1986-03-03 1987-09-03 Nl Industries Inc Improvements relating to apparatus for supporting and manipulating objects
JPH0464686A (ja) * 1990-07-03 1992-02-28 Masato Ohori 基礎装置の長柄軸昇降装置
US20050189118A1 (en) * 2004-02-26 2005-09-01 Moncus James D. Swing arm crane and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102225734A (zh) * 2011-05-26 2011-10-26 中国海洋石油总公司 深水绞车下放安装用主动升沉补偿装置
EP2801517A1 (fr) * 2013-05-06 2014-11-12 Siemens Aktiengesellschaft Appareil de manipulation de module sous-marin

Also Published As

Publication number Publication date
NO20082892L (no) 2010-01-04
NO332075B1 (no) 2012-06-18

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