WO2021054839A1 - Montage sous-marin d'équipement auxiliaire sur un élément allongé - Google Patents

Montage sous-marin d'équipement auxiliaire sur un élément allongé Download PDF

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Publication number
WO2021054839A1
WO2021054839A1 PCT/NO2020/050237 NO2020050237W WO2021054839A1 WO 2021054839 A1 WO2021054839 A1 WO 2021054839A1 NO 2020050237 W NO2020050237 W NO 2020050237W WO 2021054839 A1 WO2021054839 A1 WO 2021054839A1
Authority
WO
WIPO (PCT)
Prior art keywords
elongate member
ancillary equipment
mounting
vessel
deployment
Prior art date
Application number
PCT/NO2020/050237
Other languages
English (en)
Inventor
Pål HYLLAND
Original Assignee
Equinor Energy 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 Equinor Energy As filed Critical Equinor Energy As
Publication of WO2021054839A1 publication Critical patent/WO2021054839A1/fr

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
    • F16L1/20—Accessories therefor, e.g. floats, weights
    • F16L1/24—Floats; Weights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes
    • 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
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E21B43/013—Connecting a production flow line to an underwater well head
    • 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
    • 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

Definitions

  • the present invention relates to the subsea mounting of ancillary equipment on an elongate member, and, in particular, post-deployment subsea mounting of such ancillary equipment.
  • Hydrocarbons are organic compounds consisting of hydrogen and carbon. Examples of hydrocarbons, which are used as an energy source, are methane, ethane, butane, pentane and hexane, but many other hydrocarbons are used as an energy source or for other industrial purposes.
  • Crude oil includes hydrocarbons and crude oil is commonly produced from reservoirs in geological formations, typically below the seabed.
  • Elongate members such as risers, unbonded flexible pipe, steel pipe, umbilicals and power cables are often used offshore to convey power and/or fluids, including hydrocarbons between a subsea structure, e.g. a wellhead or manifold, and a surface platform, e.g. a drilling platform or floating production storage and offloading (FPSO) vessel.
  • FPSO floating production storage and offloading
  • a method for the subsea mounting of ancillary equipment on an elongate member comprises mounting ancillary equipment on an elongate member, after the elongate member has been deployed from a deployment vessel and before final installation of the elongate member.
  • the elongate member After the elongate member has been deployed from the deployment vessel, the elongate member may not be coupled to the deployment vessel.
  • the method may further comprise, before mounting the ancillary equipment, deploying the elongate member from the deployment vessel.
  • Deploying the elongate member from the deployment vessel may comprise feeding out the elongate member from a storage device on the deployment vessel, and deploying the elongate member into the water.
  • the step of mounting the ancillary equipment may be performed while the elongate member is located subsea in a temporary position in which at least a portion of the elongate member is located at or near the seabed and at least one end of the elongate member is not connected.
  • the at least one end that is not connected may be tied down to the seabed, or to a structure at or near the seabed.
  • the elongate member may be deployed into the temporary position, and in the temporary position at least a portion of the elongate member may be located on a platform that supports the elongate member above the seabed, thereby providing access for mounting the ancillary equipment.
  • the method may further comprise, after mounting the ancillary equipment, performing final installation of the elongate member.
  • Performing final installation of the elongate member may comprise: connecting the elongate member to a subsea structure and/or a surface platform, wherein, once so connected, the elongate member is configured to transport fluids and/or power between the subsea structure and the surface platform.
  • the method may further comprise transporting hydrocarbon fluids through the line.
  • the deployment vessel may be a first vessel, and the step of mounting the ancillary equipment may be performed and/or managed using a second vessel.
  • the ancillary equipment may be mounted on the elongate member using an ROV or AUV.
  • the ancillary equipment may comprise at least one of a buoyancy module, a vortex induced vibration strake and a clamp.
  • the line may be one of: a riser, a pipeline, a tubular, a flexible steel pipe, an electrical cable or a hydraulic cable.
  • the step of mounting ancillary equipment may comprise mounting: at least 30, and preferably between 30 and 50; or at least 100, and preferably between 100 and 200, items of ancillary equipment.
  • the elongate member may be a tubular or a flexible line.
  • the elongate member may be a riser, an unbonded flexible pipe, a bonded flexible pipe, a steel pipe, an umbilical or a power cable.
  • Said ancillary equipment may comprise buoyancy modules, and the method may further comprise, after said mounting, raising the line from the seabed by increasing the buoyancy in the buoyancy modules.
  • Figure 1 illustrates a method of mounting ancillary equipment to an elongate member in accordance with the prior art.
  • Figure 2 illustrates an initial stage of the method in which an elongate member is deployed from a deployment vessel into a body of water.
  • Figure 3 shows the elongate member following deployment from the deployment vessel.
  • Figure 4 illustrates a method step in which ancillary equipment is mounted subsea on the elongate member.
  • Figure 5 shows the elongate member after a final installation process.
  • Figure 6 shows the elongate member following deployment from the deployment vessel, where at least a portion of the elongate member is supported by a platform.
  • Figure 7 shows a high-level flow diagram describing a method in accordance with the invention.
  • FIG. 1 illustrates an initial stage of a procedure of installing an elongate member in accordance with existing techniques.
  • An installation vessel 910 carries a storage device 914, e.g. a reel or built-in carousel, on which an elongate member 912 is carried.
  • the elongate member 912 is fed out from the storage device 914 and through installation spread 916, where the installation spread 916 supports the load imposed by the deployed elongate member, and may remove residual curvature from the elongate member if necessary, e.g. if the elongate member is a steel pipe.
  • ancillary equipment 920 is mounted onto the elongate member, e.g.
  • the ancillary equipment may include buoyancy modules, VIV strakes and/or clamps. In this way, the ancillary equipment is mounted on a portion of the elongate member before said portion enters the water, i.e. during deployment of the elongate member.
  • the same installation vessel will go on to perform a final installation of the elongate member, in which the elongate member is connected between e.g. a subsea structure, such as a wellhead or manifold, and a surface platform, such as a drilling platform or FPSO vessel.
  • the elongate member may be deployed to a temporary position and left for future final installation.
  • Fig. 1 installation methods such as illustrated in Fig. 1 have significant drawbacks.
  • the time required for the onboard mounting of ancillary equipment may increase the total installation or deployment time significantly, resulting in a total installation time on the order of days.
  • the planned installation or deployment duration must be within a forecasted window of good weather and sufficiently low wave-height, within a predetermined safety factor. Longer total installation or deployment times decrease the likelihood of a suitable weather window, and if installation or deployment cannot start the installation vessel will remain on stand-by, incurring additional costs, until the forecast confirms a satisfactory window. This typically limits the installation of elongate members to the summer season, due to the increased likelihood of a suitable weather window.
  • the ancillary equipment installed on an elongate member typically increases the load on an elongate member during deployment, reducing the allowable waveheight during an installation procedure.
  • the present invention relates to a method for the subsea mounting of ancillary equipment on an elongate member, in which the ancillary equipment is mounted on the elongate member after the elongate member has been deployed from a deployment vessel, i.e. once a deployment procedure is complete, and before final installation of the elongate member.
  • the method of the present invention therefore fully or partly decouples the procedure of mounting ancillary equipment on the elongate member from the procedure of deploying the elongate member.
  • Removing the necessity to mount ancillary equipment during deployment of the elongate member reduces the duration of the deployment procedure and reduces the load on the elongate member during deployment.
  • Such reductions will be significant for the deployment of longer elongate members in deeper waters, or for risers requiring a large number of buoyancy modules.
  • the deployment procedure is critically dependent on weather conditions and wave height, and reducing the duration of the deployment procedure and the load on the elongate member during deployment means that a shorter forecasted window of weather is required and a larger wave height may be allowed for deployment to begin. This will increase the proportion of vessel time that can be used for deployment, thereby increasing the efficiency of the deployment procedure.
  • the season suitable for elongate member deployment may be extended, and vessel stand-by time and costs will be decreased. Further, a smaller, cheaper vessel may be used to mount the ancillary equipment on the elongate member, further reducing vessel costs and increasing efficiency of the installation of elongate members.
  • the load design requirements may be less stringent for ancillary equipment used in the method, because the load imposed by the ancillary equipment on the elongate member will no longer critically affect the window for deployment, and hence the efficiency and cost of the overall installation. It is recognised that the lack of buoyancy modules during deployment may affect the top tension on the elongate member, and hence vessel installation spread capacity, for deployment in very deep waters.
  • the post-deployment subsea mounting of ancillary equipment on an elongate member in accordance with the invention will be particularly useful in harsh environments, and for optimising planned, large-scale installation campaigns.
  • at least 100 items of ancillary equipment are mounted on the elongate member.
  • Figure 2 illustrates an initial step of the method in which an elongate member 202 is deployed into the water from a deployment vessel 250.
  • the elongate member is a tubular or a flexible line, e.g. a riser, an unbonded flexible pipe, a bonded flexible pipe, a steel pipe, an umbilical or a power cable.
  • a riser e.g. a riser
  • an unbonded flexible pipe e.g. a riser
  • a bonded flexible pipe e.g. a riser
  • a steel pipe e.g. a steel pipe
  • umbilical or a power cable e.g. a riser
  • an unbonded flexible pipe a tubular that is also a flexible line.
  • the deployment is related to the offshore installation of the elongate member between a platform 240 at the sea surface 270 and a subsea structure 230 at or near the seabed 260.
  • the platform is e.g. a drilling platform or an FPSO vessel.
  • the subsea structure is e.g. a wellhead or a manifold.
  • the invention is not limited to connection between such entities, and the elongate member may be intended for final installation between any sea-surface and/or subsea structures relating to the production and/or conveyance of hydrocarbons.
  • the deployment vessel 250 carries a storage device 252, e.g. a reel or larger built-in carousel, on which the elongate member 202 is wound.
  • the storage device 252 is referred to here as a reel.
  • the deployment vessel 250 may carry separate elongate member sections, e.g. stacked on a deck of the deployment vessel, which are sequentially assembled on the vessel to form the elongate member as the elongate member is deployed.
  • the elongate member is fed out from the reel (or assembled from separate elongate member sections) and through installation spread 254, which supports the load imposed by any portion of the elongate member that has been deployed into the water, and may remove any residual curvature from the elongate member produced by the configuration of the elongate member on the reel if necessary, e.g. if the elongate member is a steel pipe.
  • the elongate member is then deployed into the water. In this embodiment the elongate member is deployed into a position at the seabed 260, and a first end of the elongate member 206 is at or near the seabed.
  • Figure 3 illustrates the elongate member in a temporary position at the seabed 360 after the deployment procedure has been completed and the deployment vessel has departed.
  • the deployment vessel may remain in place to continue with subsequent mounting and/or installation operations.
  • the temporary position is a position in which the elongate member is stable, after completion of the deployment procedure and before a final installation procedure. After completion of the deployment procedure the elongate member is entirely subsea, and is not coupled or attached to the deployment vessel in any way.
  • the first end 306 of the elongate member is at or near the seabed. In an alternative embodiment, the first end may be more distant from the seabed. In an embodiment the first end is tied down to the seabed, or to a structure at or near the seabed. Tying down the elongate member in this way retains the elongate member in the temporary position while ancillary equipment is attached in a subsequent step (described below with reference to Figure 4). Where necessary, e.g. if the ancillary equipment to be mounted includes one or more buoyancy modules, one or more intermediate portions of the elongate member may also be tied down.
  • the first end of the elongate member is not connected to any subsea structure or surface platform, and the elongate member is not ready to convey fluid or power.
  • a second end of the elongate member 308 is connected to the subsea structure 330.
  • the second end is not connected to any subsea structure or surface platform, in which case the second end may be tied down to the seabed or to a structure at or near the seabed.
  • the second end 308 is lowered to the seabed using e.g. a winch located on the deployment vessel, although any suitable method may be used.
  • the elongate member is ready for the mounting of ancillary equipment. The elongate member can remain in the temporary position for as long as is necessary.
  • Figure 4 illustrates a step of the method in which ancillary equipment 404 is mounted on the elongate member 402.
  • the ancillary equipment 404 includes at least one of a buoyancy module, a VIV strake and a clamp.
  • the elongate member 406 is in the temporary position shown in Figure 3.
  • the mounting procedure is performed, controlled and/or managed using a second vessel 410 that is different from the deployment vessel 250.
  • the second vessel shown in Figure 4 is smaller than the deployment vessel 250, and therefore may have lower operating costs.
  • any suitable vessel can be used to perform, control and/or manage the mounting procedure, including a deployment vessel such as that shown in Figure 2.
  • the ancillary equipment 404 is mounted on the elongate member 406 using an ROV 420 that is controlled from the second vessel 410.
  • ROV 420 that is controlled from the second vessel 410.
  • different methods are used for mounting the ancillary equipment, depending on conditions. For example, an AUV may be used to mount the ancillary equipment, or it may be possible for a diver to attach the ancillary equipment in shallower waters.
  • ancillary equipment 404 have been mounted on the elongate member.
  • the number of items of ancillary equipment mounted on the elongate member may be larger.
  • the number of items of ancillary equipment required is, in some cases, positively correlated with the length of the elongate member, which is itself dependent on the water depth. For example, more buoyancy modules are typically required for a longer elongate member, e.g. a riser, in deeper water.
  • At least 100 items, and preferably between 100 and 200 items, of ancillary equipment are mounted on the elongate member.
  • the water depth is e.g. 500 m to 3000 m deep
  • the elongate member is a correspondingly longer elongate member.
  • each buoyancy module is e.g. 2 m in diameter and 2 m in length.
  • the at least 100, and preferably between 100 and 200, items of ancillary equipment are buoyancy modules, and the buoyancy modules provide a net buoyancy of between 100 and 300 Te (100000 to 300000 kg) on the elongate member. It is known for mass to be used as a unit of buoyancy, and the person skilled in the art will understand that the buoyancy force is simply the product of the mass and the acceleration due to gravity.
  • At least 30 items, and preferably between 30 and 50 items, of ancillary equipment are mounted on the elongate member.
  • the water depth is e.g. equal to or less than 500 m, and the elongate member is a correspondingly shorter elongate member. For such a shorter elongate member the buoyancy required is less.
  • FIG. 5 shows the elongate member 502 after the final installation procedure.
  • the fluids are e.g. one or more of liquid or gaseous hydrocarbons, well fluids, service fluids and chemicals.
  • the elongate member is untied (if the first end, second end and/or an intermediate portion of the elongate member was tied down), and the first end 506 of the elongate member is pulled up to the surface platform 540 and connected to the platform, using any suitable method known to the skilled person.
  • the ancillary equipment 504 includes buoyancy modules, and the buoyancy modules hold the elongate member in a lazy wave configuration.
  • the elongate member may be in a vertical, free-hanging catenary, or lazy-S configuration.
  • the elongate member may be raised from the seabed by increasing the buoyancy in the buoyancy modules. In one embodiment this is achieved by releasing compressed gas into each buoyancy module from a compressed gas container in the buoyancy module.
  • any other suitable method e.g. use of a chemical reaction that releases gas, may be used to increase the buoyancy in each buoyancy module.
  • Figure 6 illustrates the elongate member 606 in the temporary position in an alternative embodiment, following mounting of the ancillary equipment 604.
  • the elongate member 606 is deployed such that, in the temporary position, at least a portion of the elongate member is supported above the seabed 660 by a platform 680, thereby providing improved access to the elongate member for mounting the ancillary equipment 604.
  • the platform 680 may be in the form of a rack, to provide easier access to the underside of the elongate member.
  • FIG. 7 shows a high-level flow diagram describing a method in accordance with the invention.
  • ancillary equipment is mounted on an elongate member, after the elongate member has been deployed from a deployment vessel and before final installation of the elongate member.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Earth Drilling (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

L'invention concerne un procédé de montage sous-marin d'équipement auxiliaire sur un élément allongé. Le procédé comprend le montage d'un équipement auxiliaire sur un élément allongé, après que l'élément allongé a été déployé à partir d'un navire de déploiement et avant l'installation finale de l'élément allongé.
PCT/NO2020/050237 2019-09-20 2020-09-14 Montage sous-marin d'équipement auxiliaire sur un élément allongé WO2021054839A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1913599.5A GB2587344B (en) 2019-09-20 2019-09-20 Subsea mounting of ancillary equipment on an elongate member
GB1913599.5 2019-09-20

Publications (1)

Publication Number Publication Date
WO2021054839A1 true WO2021054839A1 (fr) 2021-03-25

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WO (1) WO2021054839A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4810133A (en) * 1987-09-30 1989-03-07 Shell Oil Company Tension leg platform tendon installation by deep catenary tow
WO2008094932A2 (fr) * 2007-01-29 2008-08-07 Chevron U.S.A. Inc. Ensemble de tube ascenseur monté rotatif
WO2011014651A1 (fr) * 2009-07-31 2011-02-03 Excelerate Energy Limited Partnership Système, procédé et appareil pour installation sous-marine de modules de flottabilité
WO2017194066A1 (fr) * 2016-05-09 2017-11-16 Subcpartner A/S Module de flottabilité, pince pour le module de flottabilité, et procédé de montage du module de flottabilité sur un tuyau sous-marin
US20180017186A1 (en) * 2015-02-24 2018-01-18 Statoil Petroleum As Direct tie-in of pipelines by added curvature

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7025533B1 (en) * 2004-09-21 2006-04-11 Kellogg Brown & Root, Inc. Concentrated buoyancy subsea pipeline apparatus and method
FR2938001B1 (fr) * 2008-11-05 2010-12-31 Technip France Procede de montage d'une tour d'exploitation d'un fluide dans une etendue d'eau et tour d'exploitation associee.
DK178613B1 (en) * 2015-05-21 2016-08-22 Subcpartner As An underwater buoy installation system and kit, a method for assembling it, use thereof, and a method for installing a buoy

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4810133A (en) * 1987-09-30 1989-03-07 Shell Oil Company Tension leg platform tendon installation by deep catenary tow
WO2008094932A2 (fr) * 2007-01-29 2008-08-07 Chevron U.S.A. Inc. Ensemble de tube ascenseur monté rotatif
WO2011014651A1 (fr) * 2009-07-31 2011-02-03 Excelerate Energy Limited Partnership Système, procédé et appareil pour installation sous-marine de modules de flottabilité
US20180017186A1 (en) * 2015-02-24 2018-01-18 Statoil Petroleum As Direct tie-in of pipelines by added curvature
WO2017194066A1 (fr) * 2016-05-09 2017-11-16 Subcpartner A/S Module de flottabilité, pince pour le module de flottabilité, et procédé de montage du module de flottabilité sur un tuyau sous-marin

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GB2587344B (en) 2021-09-29
GB201913599D0 (en) 2019-11-06
GB2587344A (en) 2021-03-31

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