EP2644821A1 - Barrière annulaire dotée d'une connexion flexible - Google Patents

Barrière annulaire dotée d'une connexion flexible Download PDF

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Publication number
EP2644821A1
EP2644821A1 EP12162461.3A EP12162461A EP2644821A1 EP 2644821 A1 EP2644821 A1 EP 2644821A1 EP 12162461 A EP12162461 A EP 12162461A EP 2644821 A1 EP2644821 A1 EP 2644821A1
Authority
EP
European Patent Office
Prior art keywords
tubular
sleeve
annular barrier
casing
expandable
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.)
Withdrawn
Application number
EP12162461.3A
Other languages
German (de)
English (en)
Inventor
Jørgen HALLUNDBAEK
Tomas Sune Andersen
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
Application filed by Welltec AS filed Critical Welltec AS
Priority to EP12162461.3A priority Critical patent/EP2644821A1/fr
Priority to CA2867519A priority patent/CA2867519A1/fr
Priority to PCT/EP2013/056470 priority patent/WO2013144183A1/fr
Priority to AU2013241857A priority patent/AU2013241857B2/en
Priority to EP13714891.2A priority patent/EP2831368A1/fr
Priority to MX2014011141A priority patent/MX2014011141A/es
Priority to CN201380014229.4A priority patent/CN104169519A/zh
Priority to US14/385,546 priority patent/US20150041154A1/en
Priority to RU2014140985A priority patent/RU2014140985A/ru
Publication of EP2644821A1 publication Critical patent/EP2644821A1/fr
Withdrawn legal-status Critical Current

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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
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/127—Packers; Plugs with inflatable sleeve
    • E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
    • 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
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
    • E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure

Definitions

  • the present invention relates to an annular barrier for providing a barrier between a casing and a borehole or between a casing and a surrounding casing.
  • annular barriers are used for different purposes, such as for providing a barrier for flow between an inner and an outer tubular structure or between an inner tubular structure and the inner wall of the borehole.
  • the annular barriers are mounted as part of the well tubular structure.
  • An annular barrier has an inner wall surrounded by an annular expandable sleeve.
  • the expandable sleeve is typically made of an elastomeric material, but may also be made of metal. The sleeve is fastened at its ends to the inner wall of the annular barrier.
  • a second annular barrier In order to seal off a zone between an inner and an outer tubular structure or a well tubular structure and the borehole, a second annular barrier is used.
  • the first annular barrier is expanded on one side of the zone to be sealed off, and the second annular barrier is expanded on the other side of that zone, and in this way, the zone is sealed off.
  • the expandable sleeve of the annular barriers When expanded, the expandable sleeve of the annular barriers is connected with the tubular part of the annular barrier by means of a slidable end and a fixed end.
  • the slidable end has shown not to be sufficiently tight for all downhole conditions.
  • annular barrier for providing a barrier between a casing and a borehole or between a casing and a surrounding casing, comprising:
  • the sleeve may be made of metal.
  • the tubular element may comprise an intermediate part between the first end part and the second end part, not connected to the sleeve and the tubular part.
  • the intermediate part of the tubular element may be separate from the sleeve and the tubular part.
  • the intermediate part may be corrugated.
  • the intermediate part may be corrugated in the axial extension.
  • the corrugated intermediate part may comprise a series of parallel ridges and furrows, and a distance may be arranged between each ridge and each furrow in the axial extension.
  • the corrugated intermediate part is compressed in the axial extension.
  • the distance between each ridge and each furrow is reduced, thereby reducing the length of the corrugated intermediate.
  • the intermediate part may have a length in the axial extension, and the intermediate part may be more compressible in the axial extension than the sleeve, causing the length of the intermediate part to reduce as the sleeve is expanded.
  • the intermediate part may comprise a first surface facing the tubular part and a second surface facing the sleeve, at least one of the surfaces comprising circumferential recesses.
  • the second surface may comprise a plurality of circumferential recesses extending from the second surface downwards into the intermediate part.
  • tubular element may have an initial length in an unexpanded state of the annular barrier and an expanded length in an expanded state of the annular barrier, the expanded length being shorter in the axial extension than the initial length.
  • tubular element may be made of a material which is more flexible than that of the expandable sleeve.
  • the intermediate part may have a first modulus of elasticity in the axial extension
  • the sleeve may have a second modulus of elasticity in the axial extension, the first modulus of elasticity being lower than the second modulus of elasticity
  • first modulus of elasticity may be 10% lower than the second modulus of elasticity, preferably 25% lower, more preferably 40% lower.
  • first end part of the tubular element may be welded to the tubular part and/or the second end part of the tubular element may be welded to the sleeve.
  • the sleeve may have two ends, each end being connected with the tubular part by means of a tubular element.
  • the sleeve may comprise a first end connected with the tubular part.
  • the annular barrier may further comprise a second tubular element connecting a second end of the sleeve with the tubular part, having an extension in the axial direction and a first end part connected with the tubular part and a second end part connected with the second sleeve end, the first end part being arranged closer to the opening along the axial extension of the tubular part than the second end part.
  • tubular element may be made of metal.
  • the sleeve may have a first end and a second end, the first sleeve end being connected to the tubular element and the second sleeve end being connected to the tubular part.
  • the present invention furthermore relates to an annular barrier system comprising a casing and at least one annular barrier as described above, wherein the tubular part may form part of the casing.
  • the annular barrier system may further comprise an inflow control section comprising a tubular part forming part of the casing and an opening in the tubular part of the inflow control section for letting fluid from a surrounding reservoir into the casing.
  • an inflow control valve may be arranged in the opening of the inflow control section.
  • the invention relates to a method for providing a barrier between a casing and a borehole or between a casing and a surrounding casing by means of the annular barrier described above, comprising the step of:
  • An annular barrier 1 shown in Fig. 1 is used for being expanded in an annulus 2 between a well tubular structure 3 and an inside wall 4 of a borehole 5 downhole to provide zone isolation between a first zone 8 and a second zone 12 of the borehole 5, as shown in Fig. 2 .
  • the tubular structure 3 may be a production casing or a liner.
  • the annular barrier 1 comprises a tubular part 6 mounted as part of the well tubular structure 3 by means of a threaded connection 40.
  • the tubular part 6 has an axial extension along a longitudinal axis 14 coaxial with the longitudinal axis of the well tubular structure 3.
  • the annular barrier 1 comprises an expandable sleeve 7 surrounding the tubular part 6 and defining a space 13 which is in fluid communication with an inside 15 of the tubular part 6.
  • the annular barrier 1 further comprises an opening 11 fluidly connected with the expandable space 13 for letting fluid from within the tubular part 6 to the space for expanding the sleeve 7.
  • the annular barrier 1 comprises also a tubular element 20 connecting the sleeve 7 with the tubular part 6.
  • the tubular element 20 has an extension in the axial extension of the tubular part, and a first end part 21 of the tubular element is connected with the tubular part and a second end part 22 of the tubular element is connected with the expandable sleeve 7.
  • the first end part 21 is arranged closer to the opening 11 along the axial extension of the tubular part 6 than the second end part 22.
  • Each end 9, 10 of the expandable sleeve 7 is connected with the tubular part 6 via a tubular element 20.
  • the annular barrier 1 comprises both a first tubular element 20A and a second tubular element 20B.
  • the first tubular element 20A connects a first end 9 of the expandable sleeve 7 with a second end part 22 of the tubular element 20 and a first end part 21 of the tubular element 20 with the tubular part 6.
  • the second tubular element 20B connects a second end 10 of the expandable sleeve with the second end 22 of the second tubular element 20B. Furthermore, the first end part 21 of the second tubular element 20B is connected with the tubular part 6.
  • the annular barrier 1 has an opening 11 for letting fluid into the expandable space 13 to expand the sleeve 7.
  • the opening 11 is arranged in the tubular part 6 so that the fluid is let directly into the expandable space 13 when the tubular part 6 and the casing are 3 pressurised to expand the expandable sleeve 7 of the annular barrier.
  • the expandable sleeve 7 is typically expanded by pressurising the well tubular structure 3 from the top of the well, which allows for expansion of several annular barriers at the same time.
  • a valve may also be arranged in the aperture, such as a one-way valve.
  • the annular barrier 1 i.e. both the tubular part, the sleeve and the tubular element, is typically made of metal.
  • the amount of force needed is substantially higher than when using en elastomeric sleeve.
  • the length of the sleeve 7 shrinks along the longitudinal axis 14, and in prior art solutions, at least one end needs to be sliding to avoid substantial thinning of the expandable sleeve 7. Having a slidable end with seals entails a substantial risk of leakage, which may prevent expansion of the sleeve 7.
  • the tubular element 20 comprises an intermediate part 18 arranged between the first end part 21 and the second end part 22.
  • the intermediate part 18 is not connected to the sleeve 7 and the tubular part 6.
  • the sleeve 7 of the annular barrier 1 is expanded, and the ends 9, 10 of the sleeve move outwards away from the tubular part 6 to make up for the axial shrinkage of the sleeve.
  • connection of the tubular elements 20A, 20B and the tubular part 6 is arranged closer to the opening 11 than in the solution of Figs. 1 and 2 .
  • the expandable sleeve 7 may be expanded to an even larger overall diameter than the solution of Figs. 1 and 2 as the tubular element 20 compensates and connects the sleeve with the tubular part 6 by also extending outwards.
  • the intermediate part 18 is corrugated in the axial extension, and the tubular element 20 thus has corrugations 23 when seen in cross-section.
  • the intermediate part 18 of the tubular element 20 has been compressed during expansion of the expandable sleeve 7.
  • the tubular element 20 has an initial length L i which is reduced during expansion to fit the shorter length of the expanded sleeve 7.
  • the tubular element 20 has a length L ex which is shorter than the initial length L i . In this way, no sliding annular barrier ends are needed to compensate for the shorter length of the sleeve in its expanded state.
  • the intermediate part 18 is more compressible in the axial extension than the sleeve, meaning that the length of the intermediate part is reduced as the sleeve 7 is expanded.
  • the corrugations 23 are pressed together, as shown in Fig. 6 .
  • the intermediate part 18 comprises a first surface 30 facing the tubular part 6 and a second surface 31 facing the sleeve 7.
  • both surfaces 30, 31 comprise circumferential recesses 32.
  • the sleeve 7 has been expanded, and the recesses 32 are pressed together so that the length L ex of the tubular element is shorter than when the annular barrier is in the unexpanded state, as shown in Fig. 7 .
  • the annular barrier 1 has an outer face 28 and circumferential sealing elements 25 connected with the outer face by means of tubular ring elements 26.
  • tubular ring elements 26 hinder free expansion of the sleeve 7, and the sleeve forms smaller corrugations 27 during expansion, thereby strengthening the sleeve, causing the collapse rating of the annular barrier to increase.
  • the tubular element 20 is made of a material which is more flexible than that of the expandable sleeve 7, so that the tubular element is more flexible than the expandable sleeve. Being more flexible, the tubular element 6 bends outwards so as to compensate for the shorter length of the expandable sleeve 7 in the axial extension.
  • the intermediate part 18 may have a first modulus of elasticity in the axial extension and the sleeve 7 may have a second modulus of elasticity in the axial extension, the first modulus of elasticity being lower than the second modulus of elasticity.
  • the first modulus of elasticity is 10% lower than the second modulus of elasticity, preferably 25% lower, more preferably 40% lower.
  • the first end part 21 of the tubular element 20 is welded to the tubular part 6, as indicated by reference no. 41 in Fig. 2
  • the second end part 22 of the tubular element 20 is welded to the sleeve 7, as indicated by reference no. 42 in Fig. 2 .
  • Welding is an easy way to join two tubular parts, and it provides for a sufficiently tight connection.
  • the first end part 21 of the tubular element 20 is welded together with the tubular part 6, and the expandable sleeve is subsequently arranged so that it surrounds the tubular part 6 and the tubular element 20, and the second end part of the tubular element 20 are welded together with the expandable sleeve 7.
  • the outer face and second surface facing the sleeve of the tubular element 20 may have recesses, as shown in Fig. 10 .
  • the recesses are reduced, and the tubular element 20 bends outwards as the expandable sleeve 7 is expanded.
  • the expandable sleeve also moves outwards and shortens in length, however, the sleeve has a curved cross-sectional shaped since it is welded to and prevented from free expansion by the tubular element, as shown in Fig. 11 .
  • the annular barrier 1 comprises only one tubular element 20.
  • the annular barrier 1 is in its unexpanded state, and in Fig. 13 , the annular barrier is in its expanded condition.
  • the first sleeve end 9 is connected to the second end part 22 of the tubular element 20, and the first end part 21 of the tubular element is connected to the tubular part 6.
  • the second end 10 of the sleeve 7 is connected directly to the tubular part 6, meaning that the second sleeve end 10 is connected to the tubular part 6 without any tubular elements.
  • one end of the expandable sleeve 7 is fixedly connected directly with the tubular part 6 and the other end is intermediately connected with the tubular part by the tubular element 6. In this way, it is possible to avoid a slidable end slidably fastening the sleeve 7 to the tubular part 6.
  • a valve may be arranged in the opening of the tubular part 6.
  • the valve may be a one-way valve so that the fluid injected into the space is trapped in the space 13, after which the tubular part and the well tubular structure 3, also called a casing, are no longer pressurised to expand the expandable sleeve 7.
  • the invention further relates to an annular barrier system 100, shown in Fig. 9 , comprising a casing and at least one annular barrier, wherein the tubular part forms part of the casing.
  • the annular barrier system 100 may further comprise an inflow control section 120 comprising a tubular part forming part of the casing and an opening 121 in the tubular part of the inflow control section for letting fluid from a surrounding reservoir into the casing.
  • An inflow control valve 122 may be arranged in the opening of the inflow control section 120.
  • the well system 100 further comprises a tool (not shown) having an isolation means isolating a part of the inside of the tubular part opposite the opening 11 to pressurise the isolated part of the inside of the tubular part, and thus the space 13, to expand the sleeve 7.
  • the isolation means may be an inflatable elastomeric element or a metal packer.
  • the tool further comprises a pumping device for pumping fluid from the inside of the tubular part 6 opposite the isolated part 28 into the isolated part to expand the expandable sleeve 7.
  • the well system 100 may also have several annular barriers 1.
  • the expandable sleeve 7 of the annular barrier 1 When the expandable sleeve 7 of the annular barrier 1 is expanded, the diameter of the sleeve is expanded from its initial unexpanded diameter to a larger diameter.
  • the expandable sleeve 7 has an outside diameter D (shown in Fig. 1 ) and is capable of expanding to an at least 10% larger diameter, preferably an at least 15% larger diameter, more preferably an at least 30% larger diameter than that of an unexpanded sleeve.
  • the expandable sleeve 7 has a wall thickness t (shown in Fig. 1 ) which is thinner than a length L (shown in Fig. 1 ) of the expandable sleeve, the thickness preferably being less than 25% of the length, more preferably less than 15% of the length, and even more preferably less than 10% of the length.
  • the expandable sleeve 7 of the annular barrier 1 may be made of metal, polymers, an elastomeric material, silicone, or natural or synthetic rubber.
  • the fluid used for expanding the expandable sleeve may be any kind of well fluid present in the borehole surrounding the tool and/or the well tubular structure 3.
  • the fluid may be cement, gas, water, polymers, or a two-component compound, such as powder or particles mixing or reacting with a binding or hardening agent.
  • Part of the fluid, such as the hardening agent may be present in the cavity between the tubular part and the expandable sleeve before injecting a subsequent fluid into the cavity.
  • 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.

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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)
  • Earth Drilling (AREA)
  • Pipe Accessories (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Joints Allowing Movement (AREA)
  • Gasket Seals (AREA)
EP12162461.3A 2012-03-30 2012-03-30 Barrière annulaire dotée d'une connexion flexible Withdrawn EP2644821A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP12162461.3A EP2644821A1 (fr) 2012-03-30 2012-03-30 Barrière annulaire dotée d'une connexion flexible
CA2867519A CA2867519A1 (fr) 2012-03-30 2013-03-27 Barriere annulaire comportant un raccord flexible
PCT/EP2013/056470 WO2013144183A1 (fr) 2012-03-30 2013-03-27 Barrière annulaire comportant un raccord flexible
AU2013241857A AU2013241857B2 (en) 2012-03-30 2013-03-27 An annular barrier having a flexible connection
EP13714891.2A EP2831368A1 (fr) 2012-03-30 2013-03-27 Barrière annulaire comportant un raccord flexible
MX2014011141A MX2014011141A (es) 2012-03-30 2013-03-27 Barrera anular con una conexion flexible.
CN201380014229.4A CN104169519A (zh) 2012-03-30 2013-03-27 具有柔性连接部的环状屏障
US14/385,546 US20150041154A1 (en) 2012-03-30 2013-03-27 Annular barrier having a flexible connection
RU2014140985A RU2014140985A (ru) 2012-03-30 2013-03-27 Затрубный барьер, имеющий гибкое соединение

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12162461.3A EP2644821A1 (fr) 2012-03-30 2012-03-30 Barrière annulaire dotée d'une connexion flexible

Publications (1)

Publication Number Publication Date
EP2644821A1 true EP2644821A1 (fr) 2013-10-02

Family

ID=48050688

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12162461.3A Withdrawn EP2644821A1 (fr) 2012-03-30 2012-03-30 Barrière annulaire dotée d'une connexion flexible
EP13714891.2A Withdrawn EP2831368A1 (fr) 2012-03-30 2013-03-27 Barrière annulaire comportant un raccord flexible

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP13714891.2A Withdrawn EP2831368A1 (fr) 2012-03-30 2013-03-27 Barrière annulaire comportant un raccord flexible

Country Status (8)

Country Link
US (1) US20150041154A1 (fr)
EP (2) EP2644821A1 (fr)
CN (1) CN104169519A (fr)
AU (1) AU2013241857B2 (fr)
CA (1) CA2867519A1 (fr)
MX (1) MX2014011141A (fr)
RU (1) RU2014140985A (fr)
WO (1) WO2013144183A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106460482A (zh) * 2014-05-19 2017-02-22 韦尔泰克有限公司 用于钻进穿过低压区的井下管柱
EP3263829A1 (fr) * 2016-06-28 2018-01-03 Welltec A/S Système de forage de fond de trou
EP3647532A1 (fr) * 2018-10-30 2020-05-06 Welltec Oilfield Solutions AG Barrière annulaire
WO2020104671A1 (fr) * 2018-11-23 2020-05-28 Welltec Oilfield Solutions Ag Barrière annulaire
EP3667014A1 (fr) * 2018-12-13 2020-06-17 Welltec Oilfield Solutions AG Barrière annulaire

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO342480B1 (no) * 2016-09-30 2018-05-28 Marine Aluminium As Fleksibelt ettergivende barriere
GB2572449B (en) * 2018-03-30 2020-09-16 Morphpackers Ltd Improved isolation barrier
CN114075940B (zh) * 2020-08-19 2024-04-26 中国石油化工股份有限公司 一种封隔器结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781852A (en) * 1953-12-17 1957-02-19 Exxon Research Engineering Co Well packer
US5404946A (en) * 1993-08-02 1995-04-11 The United States Of America As Represented By The Secretary Of The Interior Wireline-powered inflatable-packer system for deep wells
US20010037881A1 (en) * 1998-04-15 2001-11-08 Marion Brecheisen Well production enhancing device
WO2010031991A1 (fr) * 2008-09-19 2010-03-25 Swellfix B.V. Joint de fond de trou
WO2011042492A1 (fr) * 2009-10-07 2011-04-14 Welltec A/S Barrière annulaire

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6854522B2 (en) * 2002-09-23 2005-02-15 Halliburton Energy Services, Inc. Annular isolators for expandable tubulars in wellbores
MY137430A (en) * 2003-10-01 2009-01-30 Shell Int Research Expandable wellbore assembly
WO2012045355A1 (fr) * 2010-10-07 2012-04-12 Welltec A/S Barrière annulaire
EP2706189B1 (fr) * 2011-01-25 2017-10-18 Welltec A/S Barrière annulaire dotée d'une membrane

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781852A (en) * 1953-12-17 1957-02-19 Exxon Research Engineering Co Well packer
US5404946A (en) * 1993-08-02 1995-04-11 The United States Of America As Represented By The Secretary Of The Interior Wireline-powered inflatable-packer system for deep wells
US20010037881A1 (en) * 1998-04-15 2001-11-08 Marion Brecheisen Well production enhancing device
WO2010031991A1 (fr) * 2008-09-19 2010-03-25 Swellfix B.V. Joint de fond de trou
WO2011042492A1 (fr) * 2009-10-07 2011-04-14 Welltec A/S Barrière annulaire

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106460482A (zh) * 2014-05-19 2017-02-22 韦尔泰克有限公司 用于钻进穿过低压区的井下管柱
US10253591B2 (en) 2014-05-19 2019-04-09 Welltec Oilfield Solutions Ag Downhole string for drilling through a low pressure zone
EP3263829A1 (fr) * 2016-06-28 2018-01-03 Welltec A/S Système de forage de fond de trou
WO2018001984A1 (fr) * 2016-06-28 2018-01-04 Welltec A/S Système de forage en fond de trou
AU2017291178B2 (en) * 2016-06-28 2020-01-30 Welltec Oilfield Solutions Ag Downhole drilling system
US10626700B2 (en) 2016-06-28 2020-04-21 Welltec Oilfield Solutions Ag Downhole drilling system
EP3475522B1 (fr) * 2016-06-28 2024-05-22 Welltec Manufacturing Center Completions ApS Système de forage de fond de trou
EP3647532A1 (fr) * 2018-10-30 2020-05-06 Welltec Oilfield Solutions AG Barrière annulaire
WO2020089194A1 (fr) * 2018-10-30 2020-05-07 Welltec Oilfield Solutions Ag Barrière annulaire
US11208866B2 (en) 2018-10-30 2021-12-28 Welltec Oilfield Solutions Ag Annular barrier
WO2020104671A1 (fr) * 2018-11-23 2020-05-28 Welltec Oilfield Solutions Ag Barrière annulaire
EP3667014A1 (fr) * 2018-12-13 2020-06-17 Welltec Oilfield Solutions AG Barrière annulaire

Also Published As

Publication number Publication date
MX2014011141A (es) 2014-12-10
CN104169519A (zh) 2014-11-26
RU2014140985A (ru) 2016-05-27
AU2013241857B2 (en) 2016-11-24
CA2867519A1 (fr) 2013-10-03
US20150041154A1 (en) 2015-02-12
WO2013144183A1 (fr) 2013-10-03
EP2831368A1 (fr) 2015-02-04
AU2013241857A1 (en) 2014-11-06

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