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EP2540956B1 - Dispositif de prévention de l'évacuation et outil d'intervention de puits - Google Patents

Dispositif de prévention de l'évacuation et outil d'intervention de puits Download PDF

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Publication number
EP2540956B1
EP2540956B1 EP11172161.9A EP11172161A EP2540956B1 EP 2540956 B1 EP2540956 B1 EP 2540956B1 EP 11172161 A EP11172161 A EP 11172161A EP 2540956 B1 EP2540956 B1 EP 2540956B1
Authority
EP
European Patent Office
Prior art keywords
chamber
tool
blowout preventer
well
well head
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.)
Not-in-force
Application number
EP11172161.9A
Other languages
German (de)
English (en)
Other versions
EP2540956A1 (fr
Inventor
Jørgen HALLUNDBAEK
Ricardo Reves Vasques
Morten Iversen
Malcolm Macaulay
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.)
Welltec AS
Original Assignee
Welltec 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
Priority to DK11172161.9T priority Critical patent/DK2540956T3/en
Application filed by Welltec AS filed Critical Welltec AS
Priority to EP11172161.9A priority patent/EP2540956B1/fr
Priority to AU2012286078A priority patent/AU2012286078B2/en
Priority to BR112013033567A priority patent/BR112013033567A2/pt
Priority to PCT/EP2012/062699 priority patent/WO2013010777A1/fr
Priority to CN201280032459.9A priority patent/CN103649454A/zh
Priority to RU2014102490/03A priority patent/RU2014102490A/ru
Priority to MX2013014574A priority patent/MX2013014574A/es
Priority to US14/130,191 priority patent/US20140124686A1/en
Priority to CA2840464A priority patent/CA2840464A1/fr
Publication of EP2540956A1 publication Critical patent/EP2540956A1/fr
Application granted granted Critical
Publication of EP2540956B1 publication Critical patent/EP2540956B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
    • E21B33/064—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers specially adapted for underwater well heads
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/068—Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells
    • E21B33/076—Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells specially adapted for underwater installations

Definitions

  • the present invention relates to a blowout preventer for being mounted on a well head, comprising a plurality of valves arranged in fluid communication with each other, connected and forming a tubular pipe enclosing a cavity being in fluid communication with the well head when the blowout preventer is mounted onto the well head and at least one plug in the well head has been removed. Furthermore, the invention relates to a well intervention tool and a well intervention system.
  • the crown plugs Before intervening a well, the crown plugs need to be pulled in order to provide access to the well.
  • the well may be situated 2000 metres below the surface of the sea, resulting in a substantial amount of pressure acting upon the plug to be pulled, said pressure often being larger than the pressure in the well.
  • the tool for pulling the plug then has to provide a force overcoming the pressure from the water column above the plug and often also the drag force applied from the lower pressure in the well.
  • Some pulling tools anchor up inside the lubricator connected to the BOP being on top of the well head.
  • the amount of force applied by the anchors to the lubricator requires a redesign of the lubricator in order for the lubricator to be able to withstand such anchoring force.
  • WO 2010/019378 discloses a plug removal system.
  • a blowout preventer for being mounted on a well head, comprising:
  • the pressure inside the blowout preventer can be substantially reduced, reducing the amount of force needed to pull the plug.
  • the cavity may have a first pressure and the blowout preventer may further comprise a control device, such as a valve, for controlling the pressure in the cavity by letting fluid in the cavity into the first chamber part.
  • a control device such as a valve
  • the piston may be slidably arranged on a shaft arranged inside the chamber.
  • the chamber may be connected with the cavity by means of a flow channel.
  • the chamber can be arranged at a distance from the tubular part of the blowout preventer and is easily implemented in existing blowout preventers, and the control device can be mounted on the flow channel so that the control device can be operated by an ROV, or manually or even remotely.
  • the blowout preventer as described above may further comprise a control unit comprising a storage device, and a communication unit for communicating with the control device.
  • the blowout preventer as described above may comprise a sensor for sensing a pressure in the cavity.
  • the present invention also relates to a well intervention tool intended to be arranged in a lubricator for pulling a plug in a top part of a well head of a well for entering the well, the well head having an axial extension, comprising:
  • the stroking tool may further comprise a control device, such as a valve, for letting fluid in through the opening of the housing into the first chamber part.
  • a control device such as a valve
  • connection pulling unit may be a GS pulling tool.
  • the piston may be slidably arranged on a shaft arranged inside the chamber.
  • control device may be arranged in the opening.
  • the stroking tool may be connected with the connection pulling unit by means of a stroker shaft.
  • the fixating unit may comprise an anchoring section having anchors moving radially from the tool towards an inside wall of the lubricator.
  • the fixating unit may be a tubular section surrounding part of the connection pulling tool for abutting a top part of the well head.
  • the connection unit of the connection pulling unit may comprise latches for engaging inside the plug to be pulled.
  • the blowout preventer according to the present invention may further comprise a control unit comprising the storage device, and a communication unit for communicating with the control device.
  • the present invention relates to a well intervention system comprising:
  • the lubricator may be closed off at a first end by a blind cap.
  • the lubricator may comprise a lubricator valve arranged to close off the lubricator at a second end of the lubricator opposite a first end.
  • a shear ram valve may be connected with the lubricator valve.
  • the intervention system may comprise a disconnection unit arranged between the lubricator valve and the blowout preventer for disconnecting a part of the system.
  • the intervention tool may comprise a driving section, such as a downhole tractor.
  • the intervention tool may be wireless and driven only by an internal power source.
  • Said intervention tool may comprise an inductive coupling for charging or recharging power.
  • the intervention system may further comprise a vehicle which is remotely operated.
  • Fig. 1 shows a blowout preventer 1 mounted to a top part 22 of the well head 2 arranged on the seabed on deep water.
  • the blowout preventer 1 comprises a plurality of valves 3, 4 arranged on top of each other, and thus in fluid communication with each other.
  • the first valve is an annular valve 3 and the other valve may be a ram valve 4.
  • the valves 3, 4 are connected and form part of a tubular pipe 5.
  • the tubular pipe is connected with the well head 2, and at the other end, the tubular pipe may be connected with a lubricator comprising a well intervention tool 100 illustrated by dotted lines.
  • the tubular pipe 5 encloses a cavity 10 which is in fluid communication with the well head when the blowout preventer is 1 mounted onto the well head 2 and at least one plug 37 in the well head has been removed by means of an intervention tool 100.
  • a lubricator 20 is arranged on top of the blowout preventer 1, said lubricator being arranged comprising the intervention tool capable of pulling the plug 37 and providing access to the well for a subsequent tool.
  • the intervention tool 100 is powered by means of a wireline 24 extending through a grease injection head 21.
  • the blowout preventer 1 further comprises a pressure reducing system in the form of a chamber 6 and a piston 7.
  • the piston 7 is arranged inside the chamber dividing the chamber into a first chamber part 8 and a second chamber part 9.
  • the first chamber part 8 is in fluid communication with the cavity and the second chamber part 9 is filled with a compressible fluid, such as gas.
  • the chamber is connected with the tubular pipe by means of a flow channel 15 providing the fluid communication between the cavity and the first chamber part.
  • a control device 11, such as a valve, is arranged in the flow channel 15 for controlling the flow of fluid into the first chamber part 8.
  • the control device 11 is closed when the lubricator 20 is connecting and subsequently, the control device 11 is opened, hence letting fluid from the cavity into the first chamber part 8, decreasing the pressure inside the blowout preventer 1 and the lubricator 20.
  • the force acting on the plug 37 is also decreased substantially and the plug 37 is thus easier to pull.
  • the piston is slidably arranged on a shaft 12 which is also inside the chamber. In this way, the movement of the piston is controlled so that the piston does not tilt and jam if further movement of the piston is needed.
  • the gas inside the second chamber part is compressed, increasing the volume of the first chamber part as it is filled with fluid.
  • the capacity of the chamber is typically 5 litres, preferably 8 litres or more preferably 10 litres, or more.
  • the control device 11 may also comprise a motor adjusting the control device or the position of the valve in order to let more or less fluid into the first chamber, or even stop the fluid from entering.
  • the chamber By having a flow channel connecting the chamber with the cavity, the chamber can be arranged at a distance from the tubular part of the blowout preventer and is easily implemented in existing blowout preventers. Furthermore, the control device 11 can be mounted on the flow channel so that the control device can be operated by an ROV, or manually or even remotely.
  • the blowout preventer 1 may further comprise a control unit comprising the storage device, and/or a communication unit for communicating with the control device.
  • the blowout preventer 1 may further comprise a sensor for sensing a pressure in the cavity and the current pressure can be sent through the communication unit or stored for later use. Depending on the pressure, the control device is actuated to either let more fluid into the first chamber part 8 or decrease the flow thereto.
  • Fig. 2 shows a well intervention tool 100 for pulling the plug 37, such as a crown plug, in a top part 23 of a well head 2 in order to be able to enter the well.
  • the intervention tool 100 comprises a connection pulling unit 50, such as a GS pulling tool having a connection unit 51 matching the connection of the plug 37.
  • the intervention tool 100 is arranged in a lubricator connected to the top of the blowout preventer 1.
  • the intervention tool 100 comprises a fixation unit 54 for fixating the stroking tool 52 in relation to the well head 2 so that the axial movement of the stroking tool 52 pulls the plug 37 out of the well head 2.
  • the fixation unit 54 comprises an anchoring section having anchors moving radially from the tool towards an inside wall of the lubricator 20 as shown in Fig. 2 .
  • the fixation unit 54 comprises a tubular section surrounding part of the connection pulling tool for abutting the top part 23 of the well head 2 as shown in Fig. 3 .
  • the stroking tool 52 comprises a tool housing in which a pressure reducing system in the form of a chamber 106 and a piston is arranged.
  • the piston 107 is arranged in a sliding manner on a shaft 112 inside the chamber, dividing the chamber into a first chamber part 108 and a second chamber part 109.
  • the first chamber part 108 is in fluid communication with an opening 113 in the tool housing 53 and thus in fluid communication with fluid in the lubricator.
  • the second chamber part 109 is filled with a compressible fluid, such as gas.
  • a compressible fluid such as gas.
  • the stroking tool 52 further comprises a control device 111, such as a valve, for controlling the pressure in the lubricator by controlling the amount of fluid let into the first chamber part 108.
  • a control device 111 such as a valve
  • the piston moves and the gas in the second chamber part 109 is compressed and the pressure inside the lubricator is reduced.
  • the pressure in the lubricator By reducing the pressure in the lubricator, the amount of force needed to pull the plug is also reduced substantially, and thus the anchoring force needed is reduced accordingly.
  • a standard lubricator can be used to anchor up and the plug can thus be pulled by a stroking tool.
  • connection of the plug 37 to be pulled comprises a female connection and the connection unit of the connection pulling unit 50 is shaped as a male connection with latches matching the female connection.
  • the intervention tool 100 further comprises a stroking tool 52 connected to the connection pulling unit and providing an axial movement along the axial extension for moving the male connection unit into engagement with the female connection of the plug 37. Once the male-shaped connection unit 51 engages the female connection of the plug, the stroking tool moves a first part of the connection pulling unit 50 in relation to a second part in order to move the latches radially outwards.
  • control device 111 is arranged in the opening 113, but may be arranged in any suitable manner.
  • the stroking tool 52 is connected with the connection pulling unit 50 by means of a stroker shaft 55 and a threaded connection or a conventional male/female connection.
  • the blowout preventer 1 may comprise a control unit comprising a storage device, and a communication unit for communicating with the control device. In this way, the control device 11 can be controlled from surface.
  • Fig. 2 further shows a well intervention system 200 comprising any conventional blowout preventer or the blowout preventer mentioned above and a lubricator 20 connectable to the blowout preventer in which the intervention tool 100 is arranged in order to pull the plug 37.
  • the intervention tool needs to pull two plugs which may be done in two runs.
  • a second intervention tool inside a second lubricator may be arranged in the vicinity of the well head, ready to be connected when the first plug is pulled.
  • the intervention system may comprise a disconnection unit arranged between a lubricator valve and the blowout preventer for disconnecting a part of the system, such as for disconnecting the lubricator and the intervention tool arranged inside the lubricator.
  • the intervention tool may further comprise a driving section, such as a downhole tractor, in order to anchor the tool inside the lubricator. Due to a pressure reducing system 120, the intervention tool needs not be anchored as much as prior art tools.
  • the intervention tool 100 may be wireless and driven only by an internal power source, such as a battery.
  • the blowout preventer 1 may often be arranged in a supporting structure in the form of a frame structure, and together with the frame structure it forms an intervention module. Furthermore, the blowout preventer 1 comprising a control device on its outside enables a diver or the Remote Operational Vehicle (also called an ROV) to read and/or operate the control device in order to let fluid into the first chamber part 8, 108.
  • a diver or the Remote Operational Vehicle also called an ROV
  • the control device may comprise a receiving and/or transmitting unit so that the control device has data transmission capability to a remote operating centre.
  • the remote operating centre may thus be located in the nearest town and still be able to control a park of wells, and thus well heads 2, without viewing the control device.
  • the blowout preventer 1 may also comprise a control unit comprising a receiving and/or transmitting unit enabling the control unit to transmit data to and from a remote operating centre. Communicating with and receiving and/or transmitting data to and from the remote operating centre may take place by means of a satellite.
  • a motor such as an electrical motor, may be arranged to operate the control device.
  • a stroking tool is a tool providing an axial force.
  • the stroking tool comprises an electrical motor for driving a pump.
  • the pump pumps fluid into a piston housing to move a piston acting therein.
  • the piston is arranged on the stroker shaft 55.
  • the pump may pump fluid into the piston housing on one side and simultaneously suck fluid out on the other side of the piston.
  • fluid or well fluid any kind of fluid that may be present in oil or gas wells downhole, such as natural gas, oil, oil mud, crude oil, water, etc.
  • gas is meant any kind of gas composition present in a well, completion, or open hole
  • oil is meant any kind of oil composition, such as crude oil, an oil-containing fluid, etc.
  • Gas, oil, and water fluids may thus all comprise other elements or substances than gas, oil, and/or water, respectively.
  • a casing any kind of pipe, tubing, tubular, liner, string etc. used downhole in relation to oil or natural gas production.
  • a downhole tractor can be used to push the tool all the way into position in the well.
  • a downhole tractor is any kind of driving tool capable of pushing or pulling tools in a well downhole, such as a Well Tractor®.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Toys (AREA)
  • Earth Drilling (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (14)

  1. Dispositif de prévention d'éruption (1) destiné à être monté sur une tête de puits (2) comprenant :
    une pluralité de soupapes (3, 4) agencées en communication de fluide entre elles, raccordées et formant un tuyau tubulaire (5) enfermant une cavité (10) qui est en communication de fluide avec la tête de puits lorsque le dispositif de prévention d'éruption est monté sur la tête de puits et lorsqu'au moins un obturateur (37) monté dans la tête de puits a été retiré,
    caractérisé en ce que le dispositif de prévention d'éruption comprend en outre une chambre (6) et un piston (7) agencé à l'intérieur de la chambre, divisant la chambre en une première partie de chambre (8) et en une seconde partie de chambre (9), la première partie de chambre étant en communication de fluide avec la cavité et la seconde partie de chambre étant remplie avec du fluide compressible, tel que du gaz.
  2. Dispositif de prévention d'éruption selon la revendication 1, dans lequel la cavité a une première pression et le dispositif de prévention d'éruption comprend en outre un dispositif de contrôle (11), tel qu'une soupape, pour contrôler la pression dans la cavité en laissant le fluide dans la cavité dans la première partie de chambre.
  3. Dispositif de prévention d'éruption selon la revendication 1 ou 2, dans lequel le piston est agencé de manière coulissante sur un arbre (12) agencé à l'intérieur de la chambre.
  4. Dispositif de prévention d'éruption selon l'une quelconque des revendications précédentes, dans lequel la chambre est raccordée avec la cavité au moyen d'un canal d'écoulement (15).
  5. Dispositif de prévention d'éruption selon l'une quelconque des revendications précédentes, comprenant en outre une unité de contrôle (38) comprenant un dispositif de stockage, et une unité de communication pour communiquer avec le dispositif de contrôle.
  6. Dispositif de prévention d'éruption selon l'une quelconque des revendications précédentes, comprenant en outre un capteur pour détecter une pression dans la cavité.
  7. Outil d'intervention de puits (100) prévu pour être agencé dans un lubrificateur pour retirer un obturateur (37) dans une partie supérieure (23) d'une tête de puits (2) d'un puits afin d'entrer dans le puits, la tête de puits ayant une extension axiale, comprenant :
    une unité de traction de raccordement (50) ayant une unité de raccordement (51) pour se raccorder à l'obturateur,
    un outil de frappe (52) ayant un boîtier d'outil (53) et étant raccordé à l'unité de traction de raccordement et fournissant un mouvement axial le long de l'extension axiale, et
    une unité de fixation (54) pour fixer l'outil de frappe par rapport à la tête de puits, de sorte que le mouvement axial de l'outil de frappe retire l'obturateur de la tête de puits, caractérisé en ce que l'outil de frappe comprend une chambre (106) et un piston (107) agencé à l'intérieur de la chambre dans une première partie de chambre (108) et une seconde partie de chambre (109), la première partie de chambre étant en communication de fluide avec une ouverture (113) dans le boîtier d'outil et la seconde partie de chambre étant remplie avec un fluide compressible, tel que du gaz.
  8. Outil d'intervention de puits (100) selon la revendication 7, dans lequel l'outil de frappe comprend en outre un dispositif de contrôle (111) tel qu'une soupape, pour laisser le fluide par le biais de l'ouverture du boîtier dans la première partie de chambre.
  9. Outil d'intervention de puits (100) selon la revendication 7 ou 8, dans lequel l'unité de traction de raccordement est un outil de traction GS.
  10. Outil d'intervention de puits (100) selon l'une quelconque des revendications 7 à 9, dans lequel le piston est agencé de manière coulissante sur un arbre (112) agencé à l'intérieur de la chambre.
  11. Outil d'intervention de puits (100) selon l'une quelconque des revendications 7 à 10, dans lequel le dispositif de contrôle est agencé dans l'ouverture.
  12. Outil d'intervention de puits (100) selon l'une quelconque des revendications 7 à 11, dans lequel l'outil de frappe est raccordé avec l'unité de traction de raccordement au moyen d'un arbre de dispositif de frappe (55).
  13. Outil d'intervention de puits (100) selon l'une quelconque des revendications 7 à 12, dans lequel l'unité de fixation comprend une section d'ancrage ayant des ancrages se déplaçant radialement, de l'outil vers une paroi intérieure du lubrificateur.
  14. Système d'intervention de puits (200) comprenant :
    un dispositif de prévention d'éruption selon l'une quelconque des revendications 1 à 6 pour le raccordement sur une tête de puits,
    un lubrificateur (20) pouvant être raccordé au dispositif de prévention d'éruption, et
    un outil d'intervention (100) selon l'une quelconque des revendications 7 à 13, agencé à l'intérieur du lubrificateur.
EP11172161.9A 2011-06-30 2011-06-30 Dispositif de prévention de l'évacuation et outil d'intervention de puits Not-in-force EP2540956B1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP11172161.9A EP2540956B1 (fr) 2011-06-30 2011-06-30 Dispositif de prévention de l'évacuation et outil d'intervention de puits
DK11172161.9T DK2540956T3 (en) 2011-06-30 2011-06-30 Blowout preventer and well intervention tool
BR112013033567A BR112013033567A2 (pt) 2011-06-30 2012-06-29 dispositivo antierupção de intervenção e ferramenta de intervenção de poço
PCT/EP2012/062699 WO2013010777A1 (fr) 2011-06-30 2012-06-29 Bloc obturateur de puits et outil d'intervention dans des puits
CN201280032459.9A CN103649454A (zh) 2011-06-30 2012-06-29 介入防喷器和井介入工具
RU2014102490/03A RU2014102490A (ru) 2011-06-30 2012-06-29 Противовыбросовый превентор для работы в скважине и инструмент для работы в скважине
AU2012286078A AU2012286078B2 (en) 2011-06-30 2012-06-29 Intervention blowout preventer and well intervention tool
MX2013014574A MX2013014574A (es) 2011-06-30 2012-06-29 Cadena de taponamiento de intervencion de pozos.
US14/130,191 US20140124686A1 (en) 2011-06-30 2012-06-29 Intervention blowout preventer and well intervention tool
CA2840464A CA2840464A1 (fr) 2011-06-30 2012-06-29 Bloc obturateur de puits et outil d'intervention dans des puits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11172161.9A EP2540956B1 (fr) 2011-06-30 2011-06-30 Dispositif de prévention de l'évacuation et outil d'intervention de puits

Publications (2)

Publication Number Publication Date
EP2540956A1 EP2540956A1 (fr) 2013-01-02
EP2540956B1 true EP2540956B1 (fr) 2013-12-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11172161.9A Not-in-force EP2540956B1 (fr) 2011-06-30 2011-06-30 Dispositif de prévention de l'évacuation et outil d'intervention de puits

Country Status (10)

Country Link
US (1) US20140124686A1 (fr)
EP (1) EP2540956B1 (fr)
CN (1) CN103649454A (fr)
AU (1) AU2012286078B2 (fr)
BR (1) BR112013033567A2 (fr)
CA (1) CA2840464A1 (fr)
DK (1) DK2540956T3 (fr)
MX (1) MX2013014574A (fr)
RU (1) RU2014102490A (fr)
WO (1) WO2013010777A1 (fr)

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WO2019104111A1 (fr) * 2017-11-22 2019-05-31 Fhe Usa Llc Dispositif d'introduction de boulet et de retrait de bouchon actionné à distance pour appareil de régulation de pression de tête de puits
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CN110368787B (zh) * 2019-07-24 2021-08-06 无锡市道格环保科技有限公司 一种臭氧脱硝喷射混匀装置

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Also Published As

Publication number Publication date
EP2540956A1 (fr) 2013-01-02
CN103649454A (zh) 2014-03-19
AU2012286078A1 (en) 2013-05-02
MX2013014574A (es) 2014-03-21
RU2014102490A (ru) 2015-08-10
AU2012286078B2 (en) 2015-02-19
DK2540956T3 (en) 2014-03-24
WO2013010777A1 (fr) 2013-01-24
CA2840464A1 (fr) 2013-01-24
BR112013033567A2 (pt) 2017-02-07
US20140124686A1 (en) 2014-05-08

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