WO2014204304A1 - Module de forage - Google Patents

Module de forage Download PDF

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Publication number
WO2014204304A1
WO2014204304A1 PCT/NL2014/050396 NL2014050396W WO2014204304A1 WO 2014204304 A1 WO2014204304 A1 WO 2014204304A1 NL 2014050396 W NL2014050396 W NL 2014050396W WO 2014204304 A1 WO2014204304 A1 WO 2014204304A1
Authority
WO
WIPO (PCT)
Prior art keywords
drilling
module
bearing structure
production
equipment
Prior art date
Application number
PCT/NL2014/050396
Other languages
English (en)
Inventor
Erik VAN HATTEM
Frank Antonio KOOPMAN
Original Assignee
Heerema Marine Contractors Nederland Se
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 Heerema Marine Contractors Nederland Se filed Critical Heerema Marine Contractors Nederland Se
Publication of WO2014204304A1 publication Critical patent/WO2014204304A1/fr

Links

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B75/00—Building or assembling floating offshore structures, e.g. semi-submersible platforms, SPAR platforms or wind turbine platforms
    • 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
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
    • 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
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • E21B15/02—Supports for the drilling machine, e.g. derricks or masts 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
    • E21B19/14—Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected; Handling between storage place and borehole
    • E21B19/146—Carousel systems, i.e. rotating rack systems
    • 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
    • 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
    • E02B2017/0039—Methods for placing the offshore structure

Definitions

  • the present invention relates to the field of hydrocarbon production in a marine environment.
  • the present invention relates to a new method a combination of a bearing structure, a drilling unit and a production unit.
  • Hydrocarbon drilling and production operations are used to search for and retrieve subterranean hydrocarbon deposits.
  • Many subterranean hydrocarbon deposits are located beneath the sea, and therefore production platforms are often located offshore.
  • oil & gas fields are generally developed from a platform which is supported by the seabed and which extends above the water surface.
  • Drilling operations include the drilling of one or more wells in the seabed, from an offshore platform in order to retrieve the hydrocarbons to the surface.
  • Offshore platforms generally comprise a bearing structure, and an upper part which is commonly known as a 'topside'.
  • the bearing structure may be fixed to the seabed and is commonly known as a 'jacket' for water depths up to approx. 150m.
  • One known alternative for handling the two stage process is to provide a platform which comprises all technical functionalities, i.e. all equipment to carry out the required tasks for both the development stage and the production stage.
  • This alternative implies a fully functional drilling rig and a fully functional production platform on a single bearing structure.
  • Space on offshore platforms is expensive, which makes this alternative not very cost-effective.
  • the platform needs to be installed when the development stage begins, the production equipment may sit idle on the platform for a considerable period of time. In terms of critical path, the platform can only start drilling once the complete platform is ready and installed.
  • Another known solution is to provide a separate drilling rig and a separate production platform.
  • the production platform may be supported by the seabed by a fixed structure which extends to above the water line, and which does not comprise a drilling unit.
  • a jack-up drilling rig is positioned alongside the production platform.
  • the jack-up drilling rig performs the drilling work and associated activities.
  • the jack-up drilling rig is removed and the production platform takes over.
  • This method works, but it requires two separate bearing structures which rest on the seabed, at least during the drilling stage. Also, two fully operational units are required, each having its own accommodation, lifesaving equipment and associated equipment.
  • a jack up rig can operate only until about 150 m water depth, so this method is quite limited in terms of areas where it can be used.
  • the same principle may be applied with floating platforms, a separate floating drilling platform and a separate floating production platform.
  • This has a disadvantage that two fully functional units are required, each having its own hull, or in general buoyancy.
  • Another known alternative is to provide a drilling module which can be added onto a platform comprising production equipment.
  • This alternative is proposed by Archer, who offer a modular drilling unit that may be placed upon a topside and perform drilling operations.
  • This solution is offered as an alternative to upgrading an existing topside.
  • the drilling module is basically an add-on to a production platform.
  • the drilling module can be removed once the development stage is complete.
  • This solution has an advantage that the drilling module can be re-used in another location after the work is complete.
  • 4666340 discloses such an alternative. This process provides an advantage that the drilling rig can be reused in another location if properly disassembled from the bearing structure. This process also provides an advantage that the idle time of the production equipment can be substantially reduced.
  • the invention provides a method of developing a hydrocarbon field in a marine environment, the method comprising:
  • ⁇ providing a bearing structure which extends above the water surface, the bearing structure comprising bearing supports for supporting a platform, the bearing structure being free of any drilling device, production equipment, power supply, water supply, lifesaving equipment, or living quarters for the crew,
  • the drilling module comprising a base having mating module supports which mate with the bearing supports,
  • the present invention provides the benefits of a smaller required platform. This results in the possibility to create fixed structures in deeper water than is possible until now.
  • the bearing structure does not need to support both the drilling rig and the production rig, so it can be lighter and/or taller.
  • a jack-up rig is also not required, taking away an important limitation. It is envisaged that the present method can be used in a range of water depths
  • the present invention may also be used with non fixed bearing structures, i.e.
  • Another benefit of the present invention is the reduced critical path. With respect to the known alternative of converting a drilling platform into a production rig, a time gain is achieved.
  • the single heavy lift operation according to the invention can be carried out in a single day, whereas a conversion operation typically takes several weeks or several months. This means that with the present invention the production of hydrocarbons can start sooner.
  • the drilling module can be positioned on the bearing structure and be put in operation before the production module is complete.
  • the required facilities for the drilling phase are thus supplied independently of the production phase. In the overall field development, this will extend the time available for fabrication, integration and onshore testing of the production modules with the duration of the drilling phase. This provides the advantage of additional time to build the production module, possibly taking this activity off the critical path and reduction of the risk of delay in the schedule of the field development.
  • a further advantage includes that the module can be optimized for each project. Before it is installed, The number and location of module supports can be adjusted to the number of mating supports on the bearing structure. The capacity of the
  • the present invention further has a benefit of a lower average day rate over the whole period of development and production, because there is never an idle drilling unit or an idle production unit.
  • the lower average day rate also results from the easy reusability of the drilling module.
  • the drilling module may be used multiple times in multiple locations..
  • the bearing structure may be a jacket.
  • the bearing structure may be floating and is known as a 'SPAR' or TLP'. Other types of floating bearing structures may also be possible.
  • the drilling module includes a drilling device, a power supply, a water supply, living quarters for the crew, lifesaving equipment, and any other fixed facilities and fixed equipment required to operate as a drilling rig.
  • the drilling module may also include a helicopter deck.
  • the production module comprises a base having mating module supports which mate with the bearing supports, the production module further comprising production equipment for producing hydrocarbons, a power supply, a water supply, living quarters for the crew, lifesaving equipment, and any other fixed facilities and fixed equipment required to operate as a production rig.
  • the development stage wells are pre-drilled for a large portion, but not completed yet, wherein no fluid connection between reservoirs (14A, 14B) and the drilling module is established yet.
  • the wells are completely drilled and temporarily closed before removal of the drilling module.
  • the bearing structure is supported by the seabed.
  • the drilling module and production module share the same bearing supports on the bearing structure.
  • the equipment to control the flow of the well is located above the waterline.
  • the present invention further relates to a combination of a bearing structure, an ntegral, self-sufficient drilling module and an integral, self-sufficient production module,
  • the bearing structure comprising bearing supports for supporting a modular platform, the bearing structure being free of any drilling device, production equipment, power supply, water supply, lifesaving equipment, or living quarters for the crew,
  • the drilling module comprising a base having mating module supports which mate with the bearing supports, the drilling module including a drilling device, a power supply, a water supply, living quarters for the crew, lifesaving equipment, and any other fixed facilities and fixed equipment required to operate as a drilling rig, the drilling module being constructed and arranged to be positioned on the bearing structure prior to the production module,
  • the production module comprising a base having mating module supports which mate with the bearing supports, the production module further comprising production equipment for producing hydrocarbons, a power supply, a water supply, living quarters for the crew, lifesaving equipment, and any other fixed facilities and fixed equipment required to operate as a production rig, the production module being arranged and constructed to be positioned on the bearing structure once the drilling module is removed.
  • the present invention further relates to an integral, self-sufficient drilling module comprising a base having mating module supports which mate with bearing supports of bearing structure, the drilling module including a drilling device, a power supply, a water supply, living quarters for the crew, lifesaving equipment, a helideck, and any other fixed facilities and fixed equipment required to operate as a drilling rig, the drilling module being constructed and arranged to be positioned on the bearing structure prior to the production module.
  • the present invention further relates to a drilling derrick comprising at least two firing lines which are positioned on the outside of the tower, and are positioned on the same side of a tower.
  • the drilling derrick comprises carrousels for supplying pipes, the carrousels being positioned on opposite sides of a tower.
  • Figure 1 schematically shows the known method of drilling wells for a production platform with a jack up drill rig.
  • Figures 2 - 8 schematically show an embodiment of the method for installation of a hydrocarbon production platform at sea according the invention.
  • Figure 2 schematically shows the installation of a bearing structure.
  • FIGS 3 and 4 schematically show the installation of the drill module.
  • Figure 5 schematically shows the pre-drilling of the wells.
  • FIGS 6 and 7 schematically show the removal of the drill module and replacing it with the upper part.
  • Figure 8 schematically shows the completion of the wells from the upper part.
  • Figure 9 shows an exploded view of the configuration.
  • Figure 10 shows a view of a drilling derrick of the prior art.
  • Figure 11 shows a view of an improved drilling derrick.
  • Figure 12 shows a view of a configuration of multiple movable drilling derricks according to the invention
  • FIG. 1 shows a known hydrocarbon production platform 10 at sea in its operational stage.
  • the production platform 10 comprises a bearing structure 28.
  • the bearing structure 28 comprises a lattice structure known as a jacket, but other structures are possible as well.
  • An upper part 20 (or topside) is located on top of the bearing structure 28.
  • the upper part 20 comprises production equipment 23 required for obtaining and/or processing hydrocarbons, living quarters 22, and a helicopter landing platform 21. Under normal operating conditions, no or only limited drilling and workover equipment is provided on the upper part 20.
  • an assisting platform more specifically a jack up platform 40, is positioned alongside the production platform 10 to carry out the drilling of the wells.
  • the following systems are essential to drilling operations:
  • Circulation system used to circulate mud. Mud cools, and lubricates the drill bit, circulates drilled cuttings to surface and provides hydrostatic head against the formation Rotary system, using either a Top Drive or Kelly System to rotate the drill pipe
  • the drill rig can be in the form of a Jack Up platform, which is rigidly connected to the seabed; or floating rigs such as Tension Leg, Compliant Tower, Mono Hull Ship, Semi- Submersible or the like. Jack-up rigs are used for water depths up to approximately 150m. At water depths greater than 150m, floating support structures are used.
  • the jack up platform 40 comprises a hull 42 which can float on water.
  • the hull 42 can sail or be towed across the sea.
  • legs 43 are lowered onto the seabed 12 and the hull 42 can be raised above the waterline 1 1 . In said situation, the hull 42 provides a stable working platform from which drilling operations can be performed.
  • the jack up vessel 40 may contain an extendable cantilever 41 which can be manoeuvered over the upper part 20 of the production platform 10 in order to reach a specific location where operations are to be performed.
  • Various kinds of equipment, for instance drilling equipment or a multi purpose tower can be provided by the jack up vessel 40, if not available on the production platform.
  • the jack up vessel 40 can furthermore provide additional living accommodation and crane capacity if required.
  • Hydrocarbons are harvested from reservoirs 14 located in or under soil layer 81 - 83. To this end, one or more holes are drilled with a drill string 36 from the upper part 20 into the soil layers 81 - 83 until a reservoir 14 is reached. Such a drilled hole is often referred to as a hydrocarbon well 1.
  • a fluid connection is created between the reservoir 14 and the upper part 20.
  • the fluid connection comprises a riser 31 which spans between the sea bed 12 and the upper part 20, and a wellbore 32, which is in general lined with a string of casings that crosses the various soil layers 81 - 83 until the end 33 of the wellbore 32 enters the reservoir 14.
  • the end 33 of the wellbore 32 contains openings to allow the hydrocarbon fluids of the reservoir 14 to enter the wellbore 32.
  • the production platform 10 is connected to a first well 1 A and a second well 1 B.
  • Equipment to control the flow of the wells 1 may be located at the platform 10, known in the art as dry tree wells.
  • the figures 2 - 8 show an embodiment of a method for installing a hydrocarbon production platform at sea according the invention.
  • a bearing structure 30 is installed on the seabed 12.
  • the bearing structure is installed with a heavy lift vessel 100 having a crane 101.
  • Hydrocarbon reservoirs 14A, 14B are located sufficiently close to the bearing structure for being reached with a drill string from this location.
  • the upper end 15 of the bearing structure 30 is located at a certain distance above sea level 11 to ensure that the upper part (or topside which is to be positioned on top of the upper end 15 is sufficiently high above the waves.
  • the lower end 16 is connected to the sea bed 12 via a foundation structure 35.
  • the bearing structure 30 comprises bearing supports 206 for supporting a module.
  • Figures 3 and 4 schematically show the installation of the drilling module 60 on top of the upper end 15 of bearing structure 30.
  • the drilling module 60 is transported to the installation site on a transportation barge 51. Subsequently, it is lifted in place by an installation vessel 100 using a crane 101.
  • the drilling module comprises a base 201 which supports the other components.
  • the base 201 has module supports 204 which are configured to mate with bearing supports 206 on the bearing structure 30.
  • the drilling module comprises a drilling derrick 212, lifesaving equipment 222, a helicopter deck 220, a power supply 214, a water supply 214, a hoisting system and a circulation system.
  • drilling operations can commence.
  • wells are pre-drilled for a large portion, but not completed yet. This means no fluid connection between the reservoirs 14 and the drilling module is established yet. This means that the end of the drill string 33 does not reach the hydrocarbon reservoir 14, a distance 77 will remain between them.
  • the well can be drilled until the end of the drill string does reach the reservoir 14, and a temporary barrier can be made to stop fluid flowing from the reservoir towards the sea bed.
  • Temporary barriers can include for instance valves or cement plugs.
  • Temporary barriers may be located in the wellhead, on the seabed, in the riser, or in the wellbore.
  • Figure 6 schematically shows the removal of the drilling module 60 after well drilling has been completed to the desired depth. By removing the drilling module, space on top of the bearing structure 30 becomes available to install the production module 50.
  • the production module 50 is generally larger than the drilling module 60.
  • the production module may be transported to location on a barge 52.
  • the production module 50 comprises different elements which may be integrally connected and supported by a base 210. The different elements may also be separate and be separately installed on the bearing structure.
  • the production module 50 comprises production equipment 23 required for obtaining and/or processing hydrocarbons, living quarters 22, and a helicopter landing platform 21.
  • the production module 50 also comprises a small drill module or workover module 25. In case the wells have not been completed into the reservoir 14, the small drill rig 25 can be used to complete the wells to the desired depth.
  • the production module comprises a power supply 214, a water supply 216, lifesaving equipment 222.
  • the base 210 comprises module supports 204 which mate with the bearing supports 206 on the bearing structure.
  • a workover unit may suffice to remove the temporary barriers that are cement plugs that were installed before the drilling module was removed.
  • a benefit of the method is that a much smaller drill or workover unit can be installed on the production module 50. This saves valuable space.
  • drilling operations may be somewhat slower than when using a larger, more powerful rig, but this is only a limited disadvantage effect as the largest part of the drilling operations have already been performed in the previous steps.
  • Figure 7 shows the production module 50 installed on top of the bearing structure 30.
  • Drilling or workover element 25 is positioned above the well area.
  • Figure 8 shows the final situation, where a fluid connection between the reservoirs 14 and the production module 50 is established by either completing the wells such that the end 33 of the well bore extends into the hydrocarbon reservoirs 14A, 14B, or by removing temporary barriers that prevented the fluid connection to be established.
  • FIG 9 an exploded view of the configuration according to the invention is shown. Multiple components are placed on the base 201 of the drilling module 60. This may be performed on shore, or at least in a sheltered environment. A crane 215 may be included, as well as a helideck 21 , accommodation 22, power supply 214, water supply 215, a circulation system 218, and other components. In a next step, the complete drilling module is positioned on the bearing structure.
  • a known drilling derrick having two firing lines 300A, 300B is shown. The firing lines are located outside the drilling derrick.
  • the invention provides a drilling derrick 212 comprising at least two firing lines 300 which are positioned on the outside of the tower, and are positioned on the same side of the tower 302. This is an improvement over the known derrick of figure 10 in which the firing lines are on opposite sides of the tower.
  • the carrousels 306 for supplying pipes are on opposite sides of the tower.
  • the drilling module 60 may comprise two drilling derricks 212 which are movable over tracks 213 independently from one another.
  • the drilling derricks 212 may each have one firing line or two firing lines and may be configured according to figure 11. This allows the two derricks to perform operations simultaneously over two different wells, thereby making operations more efficient..

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

La présente invention porte sur un procédé de développement d'un champ d'hydrocarbures dans un environnement marin, lequel procédé met en œuvre : la disposition d'une structure de portée (30) qui s'étend au-dessus de la surface de l'eau (11), la structure de portée comprenant des supports de portée (206) pour soutenir une plateforme (60 ; 50), la structure de portée étant exempte de tout dispositif de forage (212), d'équipement de production (23), d'alimentation en énergie (214), d'alimentation en eau (216), d'équipement de secours vitaux (222) ou de quartiers de vie (22) pour l'équipage, le positionnement d'un module de forage intégré autosuffisant (60) sur la structure de portée, le module de forage comprenant une base (200) ayant des supports de module d'accouplement (204) qui s'accouplent avec les supports de portée, le forage avec le module de forage, et, lors de l'achèvement de l'étape de forage, le retrait du module de forage en une opération de levage unique par levage du module de forage à partir de la structure de portée avec un navire de levage lourd (100), le fait de laisser la structure de portée à nouveau sans aucun dispositif de forage (212), ni équipement de production (23), ni alimentation en énergie (214), ni alimentation en eau (216), ni équipement de secours vitaux (222), ni quartiers de vie (22) pour l'équipage.
PCT/NL2014/050396 2013-06-17 2014-06-17 Module de forage WO2014204304A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201361835895P 2013-06-17 2013-06-17
US61/835,895 2013-06-17
NL2011002 2013-06-18
NL2011002A NL2011002C2 (en) 2013-06-18 2013-06-18 Drilling module.

Publications (1)

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WO2014204304A1 true WO2014204304A1 (fr) 2014-12-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016122334A1 (fr) * 2015-01-30 2016-08-04 Kvaerner As Système de manutention en mer et procédé de manutention
NO20160053A1 (no) * 2016-01-11 2017-07-12 Archer Norge As En dobbel rigg-installasjon på én plattform og fremgangsmåte for operasjon av to rigger på samme plattform

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US3535884A (en) * 1967-06-30 1970-10-27 Sun Oil Co Offshore drilling and production structure
US3575005A (en) * 1967-06-29 1971-04-13 Maurice N Sumner Method and apparatus for offshore operations
FR2139643A1 (en) * 1971-05-28 1973-01-12 Liautaud Jean Marine working platform - partic for operating in deep water
US3727414A (en) * 1971-06-28 1973-04-17 Bowden Drilling Services Ltd Off shore drilling platform construction
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US4666340A (en) 1986-03-28 1987-05-19 Shell Offshore Inc. Offshore platform with removable modules
WO2000027693A1 (fr) * 1998-11-06 2000-05-18 Exxonmobil Upstream Research Company Systeme d'installation de ponts pour structure offshore
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FR2139643A1 (en) * 1971-05-28 1973-01-12 Liautaud Jean Marine working platform - partic for operating in deep water
US3727414A (en) * 1971-06-28 1973-04-17 Bowden Drilling Services Ltd Off shore drilling platform construction
US4249618A (en) * 1977-12-19 1981-02-10 Compagnie Generale Pour Les Developpements Operationnels Des Richesses Sous-Marines Method and apparatus for the working of underwater deposits
US4666340A (en) 1986-03-28 1987-05-19 Shell Offshore Inc. Offshore platform with removable modules
WO2000027693A1 (fr) * 1998-11-06 2000-05-18 Exxonmobil Upstream Research Company Systeme d'installation de ponts pour structure offshore
US20040037651A1 (en) * 2000-06-21 2004-02-26 Khachaturian Jon E. Articulated multiple buoy marine platform apparatus and method of installation
FR2921098A1 (fr) * 2007-09-13 2009-03-20 Dietswell Engineering Sa Sa Procede de mise en place d'un appareil de forage en mer et de preparation au forage

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016122334A1 (fr) * 2015-01-30 2016-08-04 Kvaerner As Système de manutention en mer et procédé de manutention
EA036119B1 (ru) * 2015-01-30 2020-09-30 Квернер Ас Система для выполнения погрузочно-разгрузочных работ в морских условиях и способ выполнения погрузочно-разгрузочных работ в морских условиях
US10870467B2 (en) 2015-01-30 2020-12-22 Kvaerner As Offshore material handling system and material handling method
NO20160053A1 (no) * 2016-01-11 2017-07-12 Archer Norge As En dobbel rigg-installasjon på én plattform og fremgangsmåte for operasjon av to rigger på samme plattform
NO344101B1 (no) * 2016-01-11 2019-09-02 Archer Norge As En dobbel rigg-installasjon på én plattform og fremgangsmåte for operasjon av to rigger på samme plattform

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