EP2586963A1 - Dichtungsmaterial für ringförmige Sperren - Google Patents

Dichtungsmaterial für ringförmige Sperren Download PDF

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Publication number
EP2586963A1
EP2586963A1 EP11187092.9A EP11187092A EP2586963A1 EP 2586963 A1 EP2586963 A1 EP 2586963A1 EP 11187092 A EP11187092 A EP 11187092A EP 2586963 A1 EP2586963 A1 EP 2586963A1
Authority
EP
European Patent Office
Prior art keywords
annular barrier
annular
sealing material
outer face
strands
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Withdrawn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
EP11187092.9A
Other languages
English (en)
French (fr)
Inventor
Jørgen Hallundbæk
Paul Hazel
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 EP11187092.9A priority Critical patent/EP2586963A1/de
Priority to RU2014118530/03A priority patent/RU2014118530A/ru
Priority to US14/354,682 priority patent/US20140299334A1/en
Priority to EP12780175.1A priority patent/EP2771540A1/de
Priority to AU2012328387A priority patent/AU2012328387A1/en
Priority to BR112014008538A priority patent/BR112014008538A2/pt
Priority to CN201280050355.0A priority patent/CN103874824A/zh
Priority to MX2014004416A priority patent/MX2014004416A/es
Priority to PCT/EP2012/071270 priority patent/WO2013060849A1/en
Priority to CA2852152A priority patent/CA2852152A1/en
Publication of EP2586963A1 publication Critical patent/EP2586963A1/de
Withdrawn legal-status Critical Current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
    • E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
    • 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

Definitions

  • the present invention relates to an annular barrier for providing zone isolation between a first zone and a second zone in a borehole or a casing downhole.
  • Annular barriers or packers downhole often comprise external sealing material, such as elastomeric circumferential rings, to improve the sealing ability of the annular barrier when expanded to abut the inner wall of the casing or borehole.
  • the sealing material When expanding the annular barriers or packers, the sealing material is expanded accordingly and the sealing ability is decreased and the sealing ability of the elastomeric material is furthermore decreased when subjected to the harsh environment downhole, such as high temperatures and pressure, and also different kinds of acid.
  • Annular barriers may be part of the completion for many years without being expanded, while the elastomeric seals are continuously subjected to the harsh environment and disintegrates and thus deteriorates over that time so that when expanded, the sealing ability of the elastomeric material may be lost.
  • annular barrier for providing zone isolation between a first zone and a second zone in a borehole or a casing downhole, said annular barrier having a circumference and an outer face and comprising an annular seal comprising a sealing material having a bundle of strands wherein at least one strand comprises graphite and/or carbon.
  • the sealing material may cover less than 60% of the outer face, preferably less than 40% of the outer face, more preferably less than 30% of the outer face.
  • sealing material of the annular seal may extend around the outer face of the annular barrier.
  • a cross-sectional shape of the annular seal may substantially be a triangle, a square, a pentagon, a hexagon, or a shape having more sides.
  • sealing material may be wound around the outer face of the annular barrier with x windings, where x > 1.0.
  • x may be between 1.0 and 2.0, preferably between 1.1 and 1.7 and more preferably between 1.2 and 1.5.
  • the annular seal may have an elongated shape and two ends and may extend around the outer face of the annular barrier.
  • the ends may overlap.
  • annular barrier may comprise several annular seals.
  • the overlap may extend over at least 10% of the circumference of the annular barrier, preferably at least 15% of the circumference, more preferably at least 30%, and even more preferably at least 40% of the circumference.
  • the strands may abut each other.
  • the bundle and/or the strands may be coated with a second material selected from the group of metal, polymers, teflon, rubber or a combination thereof.
  • the strands may be twisted around each other, braided, or may form a yarn.
  • the strands may enclose a core.
  • the annular barrier according to the present invention may furthermore comprise a tubular part for mounting as part of the well tubular structure, said tubular part having a longitudinal axis, an expandable sleeve surrounding the tubular part and defining a space being in fluid communication with an inside of the tubular part, each end of the expandable sleeve being connected with the tubular part, and an aperture for letting fluid into the space to expand the sleeve.
  • the annular barrier may be a packer arranged to seal against an inner surface of a well tubular structure.
  • the annular barrier as described above may further comprise adhesive between the outer face and the annular seal.
  • the present invention further relates to a downhole annular seal comprising:
  • the present invention relates to a downhole system comprising a well tubular structure and at least one annular barrier as described above, wherein the annular barrier comprises a tubular structure mounted as part of the well tubular structure.
  • the downhole system as described above may further have a tool comprising isolation means isolating an isolated part of the inside of the tubular part outside the aperture to pressurise the isolated part of the inside and the space to expand the expandable sleeve.
  • Said tool may further comprise a pumping device for pumping fluid from the inside of the tubular part being outside the isolated part and into the isolated part to expand the expandable sleeve.
  • the present invention relates to a manufacturing method for manufacturing a annular barrier as described above, comprising the steps of:
  • the present invention relates to an application method of providing an annular barrier in a casing or borehole, comprising the steps of:
  • Said sealing material may have substantially the same length before and after expansion of the annular barrier.
  • Fig. 1 shows an annular barrier 1 for providing zone isolation between a first zone 2 and a second zone 3 in a borehole 20 as illustrated in Fig. 2 .
  • the annular barrier may also be set for providing zone isolation between a first zone 2 and a second zone 3 in a casing downhole, e.g. when arranging a production casing within an intermediate casing.
  • the annular barrier 1 has a circumference and an outer face 5 and comprises several annular seals 4, each made of a sealing material 6 having a bundle 7 of strands 8 wherein at least one strand comprises graphite and/or carbon. In this way, the seals of the annular barrier can withstand very high temperatures such as up to 650°C and a high pressure such as up to 450 bar downhole.
  • Seals of graphite or carbon are also capable of withstanding hot steam, or other gasses, lyes, and acid, such as sulphur and nitride.
  • Known elastomeric seals are capable of withstanding such harsh downhole conditions over a longer period of time, such over a time span of 10 to 20 years as they dissolve or crack.
  • the annular barrier of Fig. 1 comprises a tubular part 9 for mounting as part of the well tubular structure 10 having a longitudinal axis 11 and mounted as part of a well tubular structure 10 for e.g. the production casing.
  • the annular barrier 1 has an expandable sleeve 12 surrounding the tubular part and defining a space 13 being in fluid communication with an inside 14 of the tubular part.
  • Each end 15, 16 of the expandable sleeve is connected with the tubular part in connection parts 17, and the tubular part has an aperture 18 for letting fluid into the space 13 to expand the sleeve.
  • annular barriers will be disclosed as an annular barrier having the expandable sleeve and the tubular as just described, but the annular barrier may also be a packer set between a first tubular 22 and second tubular 23 as shown in Fig. 3 , where projections 24 presses the annular seal 4 against an inner face 25 of the second tubular 23.
  • the sealing material of the annular seal extends around the outer face of the annular barrier for one annular seal 4.
  • the annular seal has an elongated shape and two ends 27, 28 and the ends overlap so that one end 27 is arranged outside the other end 28 of the annular seal 4.
  • the sealing material is wound around the outer face of the annular barrier with x windings, where x > 1.0.
  • x is 1.0 if the ends 27, 28 face each other and x > 1.0 if one end 27 is arranged outside the other end 28 of the annular seal 4 and lies in two layers at least partly around the outer face.
  • x is between 1.0 and 2.0 in Fig.
  • x is preferably between 1.1 and 1.7 and more preferably between 1.2 and 1.5.
  • the overlap extends over at least 10% of the circumference of the annular barrier, preferably at least 15% of the circumference, more preferably at least 30%, and even more preferably at least 40% of the circumference.
  • the overlap depends on how much the outer diameter of the annular barrier is to be increased during the expansion and thus depends on the differences in the circumference before and after expansion.
  • the sleeve 12 presses against the inner face 26 of the borehole 20 as shown in Fig. 2 , pressing the annular seals against the inner face 26 and thus squeezing the annular seals in between the sleeve and the inner face.
  • the sealing material unwinds so that the ends 27, 28 of the annular seal 4 no longer overlap as shown in Fig. 2 .
  • the annular barrier further comprises adhesive between the outer face and the sealing material of the annular seal.
  • the overlapping end 27 arranged outside the innermost end 28 may also be adhered to the other end. After expansion, the annular seal needs no longer to be adhered to the outer face as it is squeezed in between the sleeve and the inner face 25.
  • the sealing material covers less than 40% of the outer face, and covers, in Fig. 4 , preferably less than 30% of the outer face, more preferably less than 20% of the outer face.
  • the annular seals 4 are arranged in external safety sleeves 37 fastened to the expandable sleeve 12 by a first connection 38 and a second connection 39.
  • the annular barrier 1 is shown in its expanded condition and in Fig. 5 , an expanded view of one of the external safety sleeves 37 of the annular barrier is shown in an unexpanded condition of the annular barrier.
  • Five annular seals are arranged on the outer face of the annular barrier being on the outer face of the external safety sleeve 37. In the unexpanded condition, the ends 27, 28 of the annular seals 4 overlap as shown in Fig. 5 .
  • the external sleeve has a trapezoidal cross-sectional shape holding the annular seals 4 closely together.
  • the annular barrier has been expanded and the annular seals 4 have been unwound so that the ends 27, 28 thereof no longer overlap.
  • fluid from one isolation zone has entered an opening 30 in the external safety sleeve 37 and presses the annular seals even further against the inner face 25 of the borehole 20.
  • the cross-sectional shape of the annular seal is substantially square, but may, in another embodiment, have another shape such as a triangular shape, a pentagonal shape, a hexagonal shape, or a shape having more sides.
  • Figs. 7a-11b the different embodiments of the annular seal are shown.
  • Figs. 7a, 8a, 9a, 10a and 11a the cross-section of the annular seal is shown, and Figs. 7b, 8b, 9b, 10b and 11b show the annular seal from a side.
  • bundle 7 of strands 8 is wound or braided together by means of another material 40 into a yarn in which the four strands lie straight along the longitudinal extension of the yarn so that they are substantially unbent.
  • Fig. 8a the bundle 7 of strands 8 in which the strands 8 are braided itself forms the yarn-like pattern shown in Figs.
  • the bundle 7 of strands 8 are wound or braided together by means of another material 40 into a yarn pattern 41 and the strands form a core 42.
  • the bundle 7 of strands 8 are wound or braided around a core 42 of another material.
  • the bundle 7 of strands 8 are twisted forming a coiling pattern 43 and the strands abut each other.
  • the other material 40 may be a material selected from the group of metal, polymers, teflon, rubber or a combination thereof.
  • the bundle 7 of strands 8 may be coated with a second material selected from the group of metal, polymers, teflon, an elastomeric material, silicone, or natural or synthetic rubber or a combination thereof. In this way, the sealing ability of the annular seal is substantially increased.
  • Fig. 12 shows a downhole system 100 comprising a well tubular structure 10 and two annular barriers having a tubular part 9 mounted as part of the well tubular structure 10.
  • the downhole system 100 may further have a tool comprising isolation means isolating an isolated part of the inside 14 of the tubular part outside the aperture 18 to pressurise the isolated part of the inside 14 and the space 13 to expand the expandable sleeve 12.
  • the tool may further comprise a pumping device for pumping fluid from the inside of the tubular part being outside the isolated part and into the isolated part to expand the expandable sleeve.
  • the expandable sleeve 12 is fastened in the connection parts 17 and the sealing material is wound around the outer face of the annular barrier to form the annular seal.
  • the sealing material is fastened to the outer face by providing adhesive between the sealing material and the outer face of the annular barrier.
  • the annular barrier is then inserted into the casing or borehole having x windings of sealing material around the outer face, where x > 1.0, and when the annular barrier is subsequently expanded, the annular barrier has y windings of sealing material around the outer face, wherein x>y.
  • each annular seal has substantially the same length before and after expansion of the annular barrier and in this way, the strands are not broken into several pieces which would ruin the sealing ability of the annular seal.
  • Graphite and carbon are not very bendable materials, but when they are being wound, some kind of flexibility is then built into the annular seal 4.
  • the strands 8 may unwind themselves slightly so that the strands of one end 27 lie in between the strands of the other end 28 of the annular seal, and the annular seal in that section is thus wider than in other sections of the annular seal.
  • An annular barrier may also be called a packer or similar expandable means.
  • the well tubular structure can be the production tubing or casing or a similar kind of tubing downhole in a well or a borehole.
  • the annular barrier can be used both in between the inner production tubing and an outer tubing in the borehole or between a tubing and the inner wall of the borehole.
  • a well may have several kinds of tubing and the annular barrier of the present invention can be mounted for use in all of them.
  • a valve may be arranged in the aperture 18 and the valve may be any kind of valve capable of controlling flow, such as a ball valve, butterfly valve, choke valve, check valve or non-return valve, diaphragm valve, expansion valve, gate valve, globe valve, knife valve, needle valve, piston valve, pinch valve, or plug valve.
  • the aperture may be arranged opposite a connection part and the connection part may have a fluid channel fluidly connecting the aperture and the space 13.
  • the expandable sleeve may be an expandable tubular metal sleeve that is a cold-drawn or hot-drawn tubular structure.
  • the expandable sleeve 12 of the annular barrier 1 When the expandable sleeve 12 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 12 has an outside diameter 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 12 has a wall thickness which is thinner than a length 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 12 of the annular barrier 1 may be made of metal, polymers, an elastomeric material, silicone,or natural or synthetic rubber.
  • additional material may be applied (not shown) onto the expandable sleeve, e.g. by adding welded material onto the outer face.
  • the thickness of the sleeve 12 is increased by fastening a ring-shaped part onto the sleeve (not shown).
  • the increased thickness of the sleeve 12 is facilitated using a varying thickness sleeve 12 (not shown).
  • a sleeve of varying thickness techniques such as rolling,extrusion or die-casting may be used.
  • 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 oilcontaining 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 tools 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®.
  • a downhole tractor may have wheels on arms projecting from a tool housing of the tractor, or driving belts for moving the tractor forward in the well.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Gasket Seals (AREA)
  • Piles And Underground Anchors (AREA)
  • Sealing Devices (AREA)
EP11187092.9A 2011-10-28 2011-10-28 Dichtungsmaterial für ringförmige Sperren Withdrawn EP2586963A1 (de)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP11187092.9A EP2586963A1 (de) 2011-10-28 2011-10-28 Dichtungsmaterial für ringförmige Sperren
RU2014118530/03A RU2014118530A (ru) 2011-10-28 2012-10-26 Уплотнительный материал для затрубных барьеров
US14/354,682 US20140299334A1 (en) 2011-10-28 2012-10-26 Sealing material for annular barriers
EP12780175.1A EP2771540A1 (de) 2011-10-28 2012-10-26 Dichtungsmaterial für ringförmige sperren
AU2012328387A AU2012328387A1 (en) 2011-10-28 2012-10-26 Sealing material for annular barriers
BR112014008538A BR112014008538A2 (pt) 2011-10-28 2012-10-26 material de vedação para barreiras anulares
CN201280050355.0A CN103874824A (zh) 2011-10-28 2012-10-26 用于环形屏障的密封材料
MX2014004416A MX2014004416A (es) 2011-10-28 2012-10-26 Material sellador para barreras anulares.
PCT/EP2012/071270 WO2013060849A1 (en) 2011-10-28 2012-10-26 Sealing material for annular barriers
CA2852152A CA2852152A1 (en) 2011-10-28 2012-10-26 Sealing material for annular barriers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11187092.9A EP2586963A1 (de) 2011-10-28 2011-10-28 Dichtungsmaterial für ringförmige Sperren

Publications (1)

Publication Number Publication Date
EP2586963A1 true EP2586963A1 (de) 2013-05-01

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ID=47115919

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11187092.9A Withdrawn EP2586963A1 (de) 2011-10-28 2011-10-28 Dichtungsmaterial für ringförmige Sperren
EP12780175.1A Withdrawn EP2771540A1 (de) 2011-10-28 2012-10-26 Dichtungsmaterial für ringförmige sperren

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP12780175.1A Withdrawn EP2771540A1 (de) 2011-10-28 2012-10-26 Dichtungsmaterial für ringförmige sperren

Country Status (9)

Country Link
US (1) US20140299334A1 (de)
EP (2) EP2586963A1 (de)
CN (1) CN103874824A (de)
AU (1) AU2012328387A1 (de)
BR (1) BR112014008538A2 (de)
CA (1) CA2852152A1 (de)
MX (1) MX2014004416A (de)
RU (1) RU2014118530A (de)
WO (1) WO2013060849A1 (de)

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GB2526596A (en) * 2014-05-29 2015-12-02 Meta Downhole Ltd Morphable apparatus
WO2016085594A1 (en) * 2014-11-25 2016-06-02 Baker Hughes Incorporated Self-lubricating flexible carbon composite seal
JP2017500523A (ja) * 2013-11-26 2017-01-05 ベイカー ヒューズ インコーポレイテッド シール構造体及びシール方法
US9714709B2 (en) 2014-11-25 2017-07-25 Baker Hughes Incorporated Functionally graded articles and methods of manufacture
US9745451B2 (en) 2014-11-17 2017-08-29 Baker Hughes Incorporated Swellable compositions, articles formed therefrom, and methods of manufacture thereof
US9840887B2 (en) 2015-05-13 2017-12-12 Baker Hughes Incorporated Wear-resistant and self-lubricant bore receptacle packoff tool
EP3255240A1 (de) * 2016-06-10 2017-12-13 Welltec A/S Bohrlochspreizsystem
US9962903B2 (en) 2014-11-13 2018-05-08 Baker Hughes, A Ge Company, Llc Reinforced composites, methods of manufacture, and articles therefrom
US9963395B2 (en) 2013-12-11 2018-05-08 Baker Hughes, A Ge Company, Llc Methods of making carbon composites
US10125274B2 (en) 2016-05-03 2018-11-13 Baker Hughes, A Ge Company, Llc Coatings containing carbon composite fillers and methods of manufacture
US10202310B2 (en) 2014-09-17 2019-02-12 Baker Hughes, A Ge Company, Llc Carbon composites
US10300627B2 (en) 2014-11-25 2019-05-28 Baker Hughes, A Ge Company, Llc Method of forming a flexible carbon composite self-lubricating seal
US10315922B2 (en) 2014-09-29 2019-06-11 Baker Hughes, A Ge Company, Llc Carbon composites and methods of manufacture
US10344559B2 (en) 2016-05-26 2019-07-09 Baker Hughes, A Ge Company, Llc High temperature high pressure seal for downhole chemical injection applications
US10480288B2 (en) 2014-10-15 2019-11-19 Baker Hughes, A Ge Company, Llc Articles containing carbon composites and methods of manufacture
US11097511B2 (en) 2014-11-18 2021-08-24 Baker Hughes, A Ge Company, Llc Methods of forming polymer coatings on metallic substrates
EP4112874A1 (de) * 2021-06-30 2023-01-04 Welltec Oilfield Solutions AG Ringförmige barriere
WO2023275277A1 (en) * 2021-06-30 2023-01-05 Welltec Oilfield Solutions Ag Annular barrier
EP4290047A1 (de) * 2022-06-10 2023-12-13 Isealate AS Aufweitbare bohrloch-rohranordnung

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FR3010130B1 (fr) * 2013-08-28 2015-10-02 Saltel Ind Element tubulaire avec etancheite dynamique et son procede d'application contre la paroi d'un puits
US9970258B2 (en) 2014-05-16 2018-05-15 Weatherford Technology Holdings, Llc Remotely operated stage cementing methods for liner drilling installations
US9745820B2 (en) 2015-04-28 2017-08-29 Thru Tubing Solutions, Inc. Plugging device deployment in subterranean wells
US10774612B2 (en) * 2015-04-28 2020-09-15 Thru Tubing Solutions, Inc. Flow control in subterranean wells
US9816341B2 (en) 2015-04-28 2017-11-14 Thru Tubing Solutions, Inc. Plugging devices and deployment in subterranean wells
US11851611B2 (en) 2015-04-28 2023-12-26 Thru Tubing Solutions, Inc. Flow control in subterranean wells
US10513653B2 (en) 2015-04-28 2019-12-24 Thru Tubing Solutions, Inc. Flow control in subterranean wells
EP3106606A1 (de) * 2015-06-19 2016-12-21 Welltec A/S Expandierbares bohrlochmetallrohr
WO2017014820A1 (en) 2015-07-21 2017-01-26 Thru Tubing Solutions, Inc. Plugging device deployment
US11761295B2 (en) 2015-07-21 2023-09-19 Thru Tubing Solutions, Inc. Plugging device deployment
WO2018111749A1 (en) * 2016-12-13 2018-06-21 Thru Tubing Solutions, Inc. Methods of completing a well and apparatus therefor
SG11202000316SA (en) * 2017-11-13 2020-02-27 Halliburton Energy Services Inc Swellable metal for non-elastomeric o-rings, seal stacks, and gaskets
AU2019445291A1 (en) * 2019-04-10 2021-09-09 Halliburton Energy Services, Inc. Protective barrier coating to improve bond integrity in downhole exposures
EP3992420A1 (de) * 2020-10-30 2022-05-04 Welltec Oilfield Solutions AG Bohrlochpackeranordnung

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Cited By (28)

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Publication number Priority date Publication date Assignee Title
JP2017500523A (ja) * 2013-11-26 2017-01-05 ベイカー ヒューズ インコーポレイテッド シール構造体及びシール方法
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CA2852152A1 (en) 2013-05-02
RU2014118530A (ru) 2015-12-10
MX2014004416A (es) 2014-06-23
US20140299334A1 (en) 2014-10-09
BR112014008538A2 (pt) 2017-04-18
EP2771540A1 (de) 2014-09-03
WO2013060849A1 (en) 2013-05-02
AU2012328387A1 (en) 2014-07-17
CN103874824A (zh) 2014-06-18

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