EP2855336A1 - Unité de tambour comportant un compensateur arqué pour cordage d'intervention de puits - Google Patents

Unité de tambour comportant un compensateur arqué pour cordage d'intervention de puits

Info

Publication number
EP2855336A1
EP2855336A1 EP13730951.4A EP13730951A EP2855336A1 EP 2855336 A1 EP2855336 A1 EP 2855336A1 EP 13730951 A EP13730951 A EP 13730951A EP 2855336 A1 EP2855336 A1 EP 2855336A1
Authority
EP
European Patent Office
Prior art keywords
drum
string
intervention string
drum unit
guide
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP13730951.4A
Other languages
German (de)
English (en)
Other versions
EP2855336B1 (fr
Inventor
Tore AARSLAND
Mads BJØRNENAK
Kenny Armstrong
Erik Zachariassen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
C6 Technologies AS
Stimline AS
Original Assignee
C6 Technologies AS
Stimline 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 C6 Technologies AS, Stimline AS filed Critical C6 Technologies AS
Publication of EP2855336A1 publication Critical patent/EP2855336A1/fr
Application granted granted Critical
Publication of EP2855336B1 publication Critical patent/EP2855336B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/36—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
    • B66D1/38—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains by means of guides movable relative to drum or barrel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/48—Control devices automatic
    • B66D1/50—Control devices automatic for maintaining predetermined rope, cable, or chain tension, e.g. in ropes or cables for towing craft, in chains for anchors; Warping or mooring winch-cable tension control
    • 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

Definitions

  • the present invention relates to a cable drum with an arch
  • the invention comprises a device for relative motion between a cable and a cable drum within a frame in order to keep a constant or very low fleet angle for the winding or unwinding string.
  • the drum is arranged to move axially within the frame.
  • the cable is moved laterally relative to the drum.
  • US3524606 Cable reel mounting describes a drum for lowering and hauling a cable through a set of horizontal guide rollers on top of a vertical pipe.
  • the drum axis is arranged pivotable so as for allowing the cable to run tangentially between the drum and the rollers for all lateral positions of the cable on the drum, so as for reducing fleet angle variation of the cable relative to the drum.
  • US3690409 describes another pivotable drum arranged for keeping the fleet angle close to the perpendicular line of the drum by shifting the ends of the drum axially while the cable is wound or unwound.
  • An advantage of US3690409 is an increased allowable axial length of the drum and thus an increased cable length capacity.
  • GB2296001 describes a winch apparatus for deploying or taking in line over a pulley arranged at a distance from the drum. The drum axis is pivotable so as for maintaining the fleet angle of the line near the perpendicular.
  • WO2006/027553 Richards describes a drum wherein the incoming line runs via a diamond screw controlled line guide which lays the cable with a fleet angle nearly perpendicularly on the drum.
  • the diamond screw controlled line guide allows for the line to be directed parallel with the drum axis.
  • WO2010/117162 also describes such an axially translating drum in a frame with a fixed entry point.
  • US7753344 to Moretz also describes an axially translating drum in a winch housing with a centrally arranged fixed entry position on the housing .
  • US2810439 McCullough describes a wellhead winch with an axially translating drum in a winch housing, wherein the winch housing is arranged for being connected under pressure to the wellhead.
  • EP0571207 describes a winch assembly with a translating drum and a fairlead for guiding the wire onto the drum under a desired fleet angle .
  • Another problem in the prior art is related to relative speed variations between the drum and the injector head. If we try and stop an intervention string during a hauling operation running the string out of the well, we run the risk of damaging the cable or the injector head very quickly. This is due to the inertia of the different components involved, because the injector head motors move less mass and are much faster to respond than the spooling unit motor which rotates a drum of considerable rotational inertia.
  • the invention is a drum unit (T) for an intervention string (0) for a well, comprising:
  • said tension compensator (3) comprises a guide arch (31) displaceable in a direction generally along the intervention string (0), orthogonal to said drum axis (10), using a first force device
  • intervention string (0) runs between said guide arch (31) to or from said first end (31A) to said drum (1) ;
  • intervention string (0) runs via a second, opposite end (31B) of said guide arch (31) via a second, fixed guide (5) at said structural frame (1) , directly or indirectly to or from said well .
  • Fig. 1 is an isometric view of a drum unit (T) according to the invention, with an intervention string partly wound up onto the drum.
  • the intervention string is for a well.
  • the drum is driven by a motor.
  • the drum unit is provided with a compensator for keeping a desired tension level in the intervention string (3) during the running of the drum.
  • the compensator arm is arranged laterally displaceable driven by an actuator, in a direction perpendicularly to the string for laying the string in a controlled way onto the drum.
  • the entire drum apparatus is arranged in a steel frame.
  • the intervention string may be a carbon fibre reinforced relatively stiff cable, or an ordinary intervention string or coiled tubing, is shown running out (or in) to the drum unit.
  • Fig. IB is a top view of the same embodiment of the invention shown in Fig. IB.
  • Fig. 2 is a side elevation view of a similar embodiment of the drum unit of the invention, with the frame (2) with the drum in the left frame part 2A , and the compensator shown in the right frame portion 2B .
  • the two frame portions may in an embodiment be split for being transported separately.
  • a difference between this embodiment and the embodiment of Fig. 1 is the position of attachment of the compensator tension mechanism (6) .
  • Fig. 3 is a side elevation view of the frame, the drum and the compensator according to the invention, with a generally closed guideway comprising bending restrictors laid horizontally and over a gooseneck to an injector head on a well.
  • Fig. 4 shows end views with two different layup patterns on a drum according to the invention.
  • Fig. 5 shows a top view of a drum unit according to the invention, and a perspective view, an end view as seen from the compensator arch's end, and a side view, all with the compensator arch in a retracted position closest to the drum, and with the compensator arch displaced to one side of the drum.
  • Fig. 6 shows the same as Fig. 5 except for the compensator arch being retracted to an extended position relative to the drum.
  • Fig. 7 shows a separate frame section (2B) with the compensator arch, as seen from the main drum frame section (2A) position.
  • the invention is illustrated in Fig. 1 and Fig. 2, a drum unit (T) for an intervention string for a well, in particular a petroleum well.
  • the drum unit comprises the following main features:
  • the drum (1) has a radius (R) equal to or larger than a smallest allowable bending radius (R0) for the intervention string.
  • R0 smallest allowable bending radius
  • the smallest allowable bending radius (R0) may be between 0.5 m and 2 m.
  • the drum (1) should be accommodated to the largest of these and have a diameter of 4.0 m so the typical height of the frame would be larger than the drum, e.g.
  • Such a drum may accommodate a cable length of 10 kilometres for a 010 mm cable. Cables such as composite fibre reinforced cables or other wireline cables intended for use on the drum may have diameters varying from 8 mm to 15 mm.
  • a long synthetic fibre cable may thus be injected by means of a drum unit and a wellhead injector into a wellhead and extended to near the end of a laterally deviated well.
  • the drum unit is provided with a tension compensator arch of which a first end is laterally displaceable in the direction of the drum.
  • the intervention string is thus shifted laterally to the left and right onto the drum during receiving or feeding out the intervention string.
  • a lateral angle on the intervention string which is almost generally avoided with the present invention, is called a fleet angle.
  • a fleet angle variation with otherwise constant drum rotation speed and string speed usually incurs a tension variation, and the absence of a fleet angle away from the perpendicular line, and its cable tension variation is taken up by the compensator arch moving a small length in and out with the varying entry point onto the drum.
  • tension variations would otherwise have required that the intervention string had to be operated at a lower maximal tension onto the drum than by the present invention.
  • the alternative of running the drum at a speed varying with the fleet angle is prohibitive if the drum is large.
  • Fig. 5 illustrates the compensator arch in a retracted position closest to the drum, and with the compensator arch displaced to one side of the drum.
  • the fleet angles between the string and the compensator arm is below 1.6 degrees and the arm is laid over 8 degrees or less laterally.
  • Fig. 6 shows the same as Fig. 5 except for the compensator arch being retracted to an extended position relative to the drum.
  • the fleet angle out of the compensator arch's top is 1.5 degrees or less, and the compensator arch is 8 degrees or less inclined laterally .
  • the width (aial length) of the drum (1) should be less than or equal to 1/1 of the internal width of the frame.
  • an embodiment has a drum width of about 1/3 as illustrated, i.e.
  • the maximal width of the drum is the entire width of the frame; e.g. about 2.5 m. Such a widening of the drum would incur significantly larger maximal lateral deviation angles for the compensator arch, and somewhat increased fleet angles out of the compensator arch for the increased lateral extension, particularly in the retracted position.
  • the tension compensator (3) is for keeping a desired tension in the intervention string (0) during the running of the intervention string onto and out of the drum (1) .
  • the compensator tightens the intervention string or yields when speed variations between the injector head's feeding speed and the speed of the drum occur.
  • the tension compensator (3) also yields when it moves away from the central plane of the drum in order to compensate for tension variations which could be compared to an otherwise varying fleet angle .
  • the drum shall operate as a slave subordinate to the injector head.
  • the tension compensator (3) comprises a guide arch (31) for guiding the intervention string (0) .
  • the radius (Rg) for the intervention string (0)'s path along the guide arch (31) is larger or equal to the least allowable bending radius (R0) for the intervention string (0) .
  • the radius may be the same for the guide arch and for the drum.
  • the guide arch (31) is displaceable to and from the drum, i.e. in a direction orthogonal to said drum axis (10), by means of a "force device" (6) attached to the structural frame (2),
  • the neutral plane of the guide arch (31) is a central vertical plane through the frame (2) and the drum as seen in Fig. IB, wherein the guide arch (31) is deviated to one side of the drum.
  • the intervention string (0) runs between a first end (31A) of the guide arch (31) and a tangential point on the drum (1) , please see the upper part of the guide arch in Fig. 1 or 2.
  • the tension compensator (3) comprises a guide arch (31) displaceable in a direction generally along the intervention string (0) , orthogonal to said drum axis (10), using a first force device (6, 6B, 62B) connected to said structural frame (2) for keeping said intervention string (0) in tension.
  • a first guide (4) may be arranged moving in synchrone with the lateral movement of the guide arch.
  • the first guide (4) may be arranged on said first end (31A) of the guide arch (31) or actuator-driven laterally on the frame.
  • the intervention string (0) runs via a second, opposite end (31B) of the guide arch (31) via a second, fixed guide (5) at the
  • structural frame (1) please see the lower left part of the frame in Fig. 1, indirectly to the well.
  • the guide arch is provided with a second force device (37) , please see Fig. 1, Fig. 5 and Fig. 6, for moving said first end (31A) laterally so as for steering said intervention string onto said drum (1) .
  • the drum unit according to the invention the base of said drum (1) is provided with a groove (11) so as for guiding the base layer of the intervention string into a desired pattern on the drum.
  • this feature may make the second force device redundant, as the incoming intervention string is steered onto the drum by the groove when winding up the base layer onto the drum, and then steers itself laterally for the subsequent string layers onto the drum, and all the time moves the guide arch's first end (31A) along with it with a very small fleet angle.
  • the drum may in this embodiment be provided with a Lebus helical groove along the base so as for steering the first layer of the cable into an even pattern. The next layer on the drum will lay itself neatly onto the base layer, and so on.
  • the compensator arm does not have to be provided with the lateral displacement actuator (37) , but winds up nicely with the
  • embodiment may readily be combined with the embodiment above for assuring that the intervention string will go into a desired laying pattern, such as a dense laying pattern with the string always laid side-by-side for the densest layering, or in other desired patterns such as shown in Figs. 4.
  • a desired laying pattern such as a dense laying pattern with the string always laid side-by-side for the densest layering, or in other desired patterns such as shown in Figs. 4.
  • the curve radius of said guide arch (31) is smaller near its lower second end (31B) and increases towards it upper, first end (31A) .
  • the fleet angle onto the drum will be negligible when the first, top end (31A) of the guide arch (31) guides the laying onto the drum (1) the intervention string (0) .
  • the guide arch will, given the
  • the drum is an external laying drum, as shown in the drawings .
  • the laying pattern may be plain, side by side without any crossings as illustrated in Fig. 1 for fully utilizing the capacity of the drum, or laid in a braided pattern with one or more crossings per revolution if another pattern is desired, as illustrated by two examples in Fig. 4.
  • the guide arch (31) is arranged linearly displaceable, i.e. it translates to and from the drum. In another embodiment it is displaceable by being pivoted about a first, upper, or second, lower axis (32, 33) arranged in the frame (1) ⁇
  • guide arch (32) may be constituted by a rotating sheave wheel that can translate back and forth, and be pivotable about the axis of the incoming cable.
  • a rotating sheave wheel that can translate back and forth, and be pivotable about the axis of the incoming cable.
  • the force device (6) may in an embodiment of the invention comprise a spring mechanism (61).
  • the force device (6) may alternatively or in addition to a spring mechanism comprise a pneumatic, hydraulic or electrical actuator (62) .
  • a hydraulic piston embodiment is shown.
  • the drum (1) is according to an embodiment arranged in bearings on an auxiliary frame (21) .
  • the auxiliary frame may, if it is narrower than the frame, be mouunted on transverse rails (25) arranged in the lower structure of the structural frame (1) .
  • the drum unit according to the invention is in an embodiment provided with one or more string tension feeder units (41, 41A, 41B) arranged either on the compensator arm or on the structural frame (2) .
  • the string tension feeder units exert at least a minimally required tension on the intervention string (0) outwardly directed from said drum (1) and are arranged for feeding the intervention string (0) in a desired direction outwardly from or inwardly to said drum (1) .
  • the tension feeder unit (41) shall preferably be employed during rigging and connection to the injector head (8) . When the injector head on the well has received the intervention string (0) the tension feeder units may be set in freewheel mode or
  • the tension feeder units may be operated during feeding out the rather stiff intervention string from the drum in order to prevent the string from raising off the drum. Speed differences between the drum and the string would be taken up by the compensator guide arch of the invention anyway.
  • the drum unit (T) is provided with a tension feeder unit (41A) arranged at a first guide (4) for said string, said tension feeder unit (41A) arranged laterally moving with said first end (31A) of said guide arch (31) .
  • said tension feeder unit (41A) is arranged at said first guide (4) arranged on said first end (31A) of said tension compensator (3) .
  • the tension feeder unit (41A) at said first guide (4) is arranged laterally displaceable on said structural frame (2), said tension feeder unit (41A) arranged laterally moving in lateral synchronous operation with said first end (31A) of said guide arch (31) .
  • the syncrhonous operation may be governed by means of an actuator (41C) .
  • Said tension feeder unit (41A, 41B) may comprise two or more motorised rollers or belts (42) oppositely arranged on either sides of said intervention string's (0) path and arranged for gripping and exerting a longitudinally directed force on said intervention string (0) .
  • a tension feeder unit (41B) is arranged by the second, fixed guide (5), please see Fig. 1. This will allow the end of the intervention string, or a whip attached to the end of the string, to be held at this point of the frame structure when the intervention string is hauled in all the way to the frame (2) .
  • This tension feeder unit (41B) may operate alone and may hold an outer end or "whip" of the intervention string (0) by said frame (2) when the intervention string (0) is entirely coiled in onto the drum. Then, however, with the string laid over the compensator arch, the structural frame (2) may not be split into two parts, a drum frame (2A) and a compensator frame (2B) because the whip or outer end of the intervention string (0) still is laid around the guide arch (31) and locks it in place.
  • Fig. 7 shows a separate frame section (2B) with the compensator arch, as seen from the main drum frame section (2 ⁇ ) position.
  • the cabinets shown in the right and left lower portions may provide space for control units, hydraulic brake or motor units, and hydraulic units for the compensator arm. The placement near the lower fixed point of the arm gives ample space for the lateral movement of the compensator arch.
  • the structural frame (2) may be disassembled into a drum frame (2A) and a compensator frame (2B) and allow them to be transported as two separate parts.
  • the first tension feeder unit (41A) is arranged at said first guide (4) .
  • the tension feeder unit (41A, 41B) may in an embodiment comprise two motorised rollers or belts (42) oppositely arranged on either sides of said intervention string's (0) path and arranged for gripping and exerting a longitudinally directed force on said intervention string, please se the insert detail in the upper left portion of Fig. 1. Braking using the motorised rollers or belts will generate heat irrespective of the motorised rollers use hydraulic or electric energy. As the brakes are small and there is a risk that they must brake for extensive lengths, large amounts of heat may be generated. The heat generated by the braking may be taken out in a hydraulic brake resistor (43) which may dissipate the heat away from the brake itself .
  • an intervention string guide channel (7) of fixed length may be arranged between the second fixed guide (5) and an injector head (8) on said well, please see Fig. 3.
  • the guide channel may comprise at least two bend restrictors (71) for the intervention string (0) .
  • the guide channel (7) including the bend restrictors (71) is preferably closed due to safety
  • the guide channel (7) may advantageously comprise pipes of fixed shape in combination with bend restrictors. In this manner the drum unit may be placed far from the injector head and the guide channel may be laid along deck and guided along inclined paths through fixed pipe sections without requiring much space along its path.
  • the guide channel (7) may advantageously be lined with a Teflon pipe in order to reduce friction and wear.
  • the drum unit may be connected directly on the well so as for the intervention string to run directly from said fixed guide (5) of the structural frame (2) to the injector head (8), i.e. that the structural frame (2) to be arranged directly above the injector head (8) .
  • the intervention string (0) is a relatively rigid fibre reinforced cable (01) , generally of a slick carbon fibre type, or a coiled tubing (02) or an otherwise slick metal string (03) .
  • intervention string may comprise an electrical conductor, a fluid communication line, a signal fibre, or combinations of two or all of those .
  • the drum unit illustrated in Fig. 1 has a typical length of 7.14 m, a height of 4.20 m, and a width of 2.49 m. The total length of the unit may prove impractical for transport.
  • the drum unit's structural frame (2) is assembled from a drum frame (2A) and a compensator frame (2B) which may be disconnected and reassembled.
  • the guide arch (32) is in an embodiment of the invention provided with a series of small sheaves (34) along its radially outward facing arch length for supporting and guiding the intervention string (0) .
  • the sheaves guide the intervention string and reduces friction between the string and the guide arch.
  • As the string runs externally along the arch on the sheaves the arch must keep the intervention string in a tension sufficient for the string to bend into the bending radius of the intervention arch. This is obtained using the force device (6) to take up any slack of the string.
  • the tension of the string may be controlled using the first and second guides' (4, 5) tensioner rollers.
  • the compensator must tighten or yield the intervention string when speed variations between the injector head's feeding speed and the speed of the drum occur. Further, the drum shall operate as a slave subordinate to the injector head.
  • the drum unit is in an embodiment provided with a control system (CS) arranged for receiving control signals from a higher order control system for the injector head (8) on the wellhead.
  • the higher order control system sends commands for feeding down, halting, or hauling up the intervention string. Further, the control system sets the speed required for the intervention string
  • the control system is arranged for coordinating the movements of the intervention string on the drum (1) with the movement of the intervention string running through the injector head (8) .
  • differences during injection and hauling are taken up by using the compensator.
  • the compensator arch is run outwardly relative to the drum axis.
  • the compensator arch may be allowed to run inwardly in order for allowing the drum to catch up, and subsequently the compensator arch is returned to near a neutral middle position in order for meeting a subsequent need for slacking or tensioning the string.
  • the present invention has been indicated as a drum unit (T) for an intervention string (0) for a well.
  • T drum unit
  • a petroleum well is the intended area of use, but a geothermal well or a water well is also possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (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)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

L'invention concerne une unité de tambour (T), destinée à un cordage d'intervention (0) de puits et qui comprend : un tambour (1) destiné audit cordage d'intervention (0), et qui présente un axe de tambour (10) et un rayon (R), est installé dans un bâti structural (2) et peut être entraîné en rotation par un moteur (22) ; un compensateur de tension (3) destiné au cordage d'intervention (0), ledit compensateur de tension (3) comprenant un guide arqué (31) pouvant être déplacé dans une direction s'étendant de manière générale le long du cordage d'intervention (0), perpendiculaire à l'axe du tambour (10), au moyen d'un premier dispositif de force (6, 6B, 62B) relié audit bâti structural (2), afin de maintenir le cordage d'intervention (0) en tension. Au moins une première extrémité (31A) dudit guide arqué (31) peut être déplacée latéralement dans une direction généralement perpendiculaire au cordage d'intervention, parallèle à l'axe du tambour (10), ledit cordage d'intervention (0) se déployant entre le guide arqué (31) ou à partir de ladite première extrémité (31A) en direction du tambour (1). Le cordage d'intervention (0) se déploie par l'intermédiaire d'une seconde extrémité (31B) opposée du guide arqué (31), par l'intermédiaire d'un second guide fixe (5) se situant sur le bâti structural (1), directement ou indirectement en direction du puits ou à partir de celui-ci.
EP13730951.4A 2012-05-30 2013-05-22 Unité de tambour comportant un compensateur arqué pour cordage d'intervention de puits Active EP2855336B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201261653239P 2012-05-30 2012-05-30
NO20120633A NO335217B1 (no) 2012-05-30 2012-05-30 Trommelenhet med en buekompensator for en brønnintervensjonsstreng
PCT/NO2013/050093 WO2013180572A1 (fr) 2012-05-30 2013-05-22 Unité de tambour comportant un compensateur arqué pour cordage d'intervention de puits

Publications (2)

Publication Number Publication Date
EP2855336A1 true EP2855336A1 (fr) 2015-04-08
EP2855336B1 EP2855336B1 (fr) 2016-04-13

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Application Number Title Priority Date Filing Date
EP13730951.4A Active EP2855336B1 (fr) 2012-05-30 2013-05-22 Unité de tambour comportant un compensateur arqué pour cordage d'intervention de puits

Country Status (5)

Country Link
EP (1) EP2855336B1 (fr)
CA (1) CA2873372C (fr)
DK (1) DK2855336T3 (fr)
NO (1) NO335217B1 (fr)
WO (1) WO2013180572A1 (fr)

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Also Published As

Publication number Publication date
EP2855336B1 (fr) 2016-04-13
NO335217B1 (no) 2014-10-20
DK2855336T3 (en) 2016-08-01
CA2873372A1 (fr) 2013-12-05
NO20120633A1 (no) 2013-12-02
CA2873372C (fr) 2019-11-05
WO2013180572A1 (fr) 2013-12-05

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