EP3159478A1 - Bohrlochvervollständigungssystemabdichtung gegen die deckschicht - Google Patents
Bohrlochvervollständigungssystemabdichtung gegen die deckschicht Download PDFInfo
- Publication number
- EP3159478A1 EP3159478A1 EP15191258.1A EP15191258A EP3159478A1 EP 3159478 A1 EP3159478 A1 EP 3159478A1 EP 15191258 A EP15191258 A EP 15191258A EP 3159478 A1 EP3159478 A1 EP 3159478A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- annular barrier
- cap layer
- tubular
- annular
- metal structure
- 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- Withdrawn
Links
- 238000007789 sealing Methods 0.000 title claims description 10
- 230000004888 barrier function Effects 0.000 claims abstract description 158
- 239000002184 metal Substances 0.000 claims abstract description 61
- 239000012530 fluid Substances 0.000 claims abstract description 60
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims description 27
- 239000007769 metal material Substances 0.000 claims description 2
- 239000004568 cement Substances 0.000 description 19
- 238000005755 formation reaction Methods 0.000 description 12
- 239000003921 oil Substances 0.000 description 10
- 239000011435 rock Substances 0.000 description 10
- 229930195733 hydrocarbon Natural products 0.000 description 7
- 150000002430 hydrocarbons Chemical class 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000004215 Carbon black (E152) Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 238000002955 isolation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 235000015076 Shorea robusta Nutrition 0.000 description 1
- 244000166071 Shorea robusta Species 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
-
- 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
Definitions
- the present invention relates to a downhole completion system for completing a well. Furthermore, the present invention relates to a completion method for a downhole completion system.
- Hydrocarbons in a reservoir are trapped by overlying rock formations with lower permeability functioning as a seal layer, also referred to as a cap layer or cap rock.
- a seal layer also referred to as a cap layer or cap rock.
- the first and upper part of the well is drilled, and the seal layer is then penetrated.
- the upper casing is run in the hole, and cement is pumped down through the casing shoe and further out of the bottom of the borehole and upwards into the annulus surrounding the casing to fill up the annulus between the casing and the borehole wall.
- a downhole completion system for completing a well having a top comprising:
- the first annular barrier, the second annular barrier, the first well tubular metal structure and the cap layer may enclose a confined space.
- the first well tubular metal structure may comprise a sensor unit arranged between the first annular barrier and the second annular barrier and configured to measure a property of a fluid in the confined space.
- the sensor unit may be comprised in the first annular barrier or the second annular barrier.
- the downhole completion system according to the present invention may further comprise a pressurisation device for pressurising the first well tubular metal structure.
- the pressurisation device may be arranged at the top of the well tubular metal structure.
- the pressurisation device may be arranged in a tool inserted into the first well tubular metal structure.
- the downhole completion system according to the present invention may further comprise one or more third annular barrier(s) arranged between the first annular barrier and the second annular barrier.
- the sensor unit may comprise a communication device configured to communicate sensor data.
- the downhole completion system may further comprise a tool having a communication module adapted to receive the sensor data.
- elastomeric seals may be arranged on an outside of the expandable tubular.
- first annular barrier or the second annular barrier may comprise a valve device in fluid communication with the expansion opening.
- the sensor unit may be connected with the valve device.
- the valve device may have a first position in which fluid is allowed to flow from the first well tubular metal structure to the annular barrier space and a second position, providing fluid communication between the annular barrier space and the confined space.
- first annular barrier or the second annular barrier may comprise a plurality of sensor units.
- the downhole completion system according to the present invention may further comprise a second well tubular metal structure extending at least partly within the first well tubular metal structure and extending below the cap layer.
- one of the annular barriers may be made solely of metal material.
- the sensor unit may comprise a sensor such as a pressure sensor or a temperature sensor.
- each annular barrier may comprise a plurality of sensors.
- the second well tubular metal structure may be suspended from the first well tubular metal structure.
- annular barrier may be arranged between the first well tubular metal structure and the second well tubular metal structure.
- the second well tubular metal structure may comprise one or more annular barriers.
- the present invention also relates to a completion method for a downhole completion system as described above, comprising the steps of:
- the completion method according to the present invention may further comprise the step of pressurising the confined space to a predetermined pressure.
- the completion method according to the present invention may further comprise the step of determining if the pressure in the confined space is kept substantially constant over a period of time to verify the sealing properties of at least one of the annular barriers against the cap layer.
- Said method may also comprise the step of determining the pressurisation performed by the sensor unit.
- the step of pressurisation may be performed from the top of the well.
- the step of pressurisation may be performed by means of a tool inserted into the first well tubular metal structure.
- the completion method according to the present invention may comprise the step of shifting a valve device of one of the annular barriers from a first position providing fluid communication from an inside of the first well tubular metal structure to the annular barrier space to a second position providing fluid communication between the annular barrier space and the confined space.
- Fig. 1 shows a downhole completion system 1 for completing a well 2 in a formation 4 comprising hydrocarbon-containing fluid, such crude oil and/or gas.
- the formation has a cap layer 5 having an upper end 6 and a lower end 7 and being substantially impermeable, preventing the hydrocarbon-containing fluid from emerging from the reservoir before a borehole 8 is drilled in the formation and extends through the cap layer.
- the cap layer is also called the seal or cap rock which is a unit with low permeability that impedes the escape of the hydrocarbon-containing fluid from the reservoir in the formation.
- Common cap layers or seals include evaporates (sedimentary rocks), chalks and shales. The cap layer thus seals off the reservoir until a borehole is drilled.
- the drilled borehole provides an inner cap layer face 9 of the cap layer 5.
- the downhole completion system 1 further comprises a first well tubular metal structure 10 arranged in the borehole.
- the downhole completion system 1 comprises a first annular barrier 11a and a second annular barrier 11b.
- Each annular barrier comprises a tubular part 12 which is mounted as part of the first well tubular metal structure and an expandable tubular 14 surrounding the tubular part.
- Each end section 31, 32 of the expandable tubular is connected with the tubular part, defining an annular barrier space 15 (shown in Fig. 2 ) between the tubular part and the expandable tubular.
- the tubular part comprises an expansion opening 16 through which pressurised fluid passes for expanding the expandable tubular and bringing the annular barrier from an unexpanded position as shown in Fig. 1 to an expanded position, as shown in Fig. 2 .
- the expandable tubular In the expanded position, the expandable tubular abuts the inner cap layer face, so that the first annular barrier is arranged at the upper end of the cap layer, and the expandable tubular of the first annular barrier overlaps the cap layer, and so that the second annular barrier is arranged at the lower end of the cap layer, and the expandable tubular of the second annular barrier overlaps the cap layer.
- the first annular barrier, the second annular barrier, the first well tubular metal structure and the cap layer enclose a confined space 17.
- the first annular barrier and/or the second annular barrier have been expanded, they form part of the main barrier, so that the hydrocarbon-containing fluid from the reservoir can only flow up through the first well tubular metal structure when drilling further into the formation and the reservoir opening up the reservoir.
- the first well tubular metal structure has an outer face 26 on which a sensor unit 18 is arranged between the first annular barrier and the second annular barrier, as shown in Figs. 1 and 2 .
- the sensor unit 18 is configured to measure a property of a fluid in the confined space to verify that the first annular barrier and the second annular barrier isolate the confined space and thus confirm that the first annular barrier and the second annular barrier provide the main barrier against the cap layer.
- the cap layer is covered with cement so that the pressurised test fluid pumped down the well tubular metal structure leaks out into the permeable formation below the cap layer, and thus it is not possible to test whether it is the cement leaking or the test fluid leaking into the permeable part of the formation.
- cement tends to deteriorate when subjected to fluid and temperature fluctuations, and especially if the fluid can enter pores in the cement layer and be trapped in the cement. Then as the temperature rises and falls, the fluid creates micro-bores in the cement.
- the sensor unit 18 is comprised in the first annular barrier and arranged in the confined space 17.
- the downhole completion system further comprises a pressurisation device 19 for pressurising the inside of the first well tubular metal structure and thus expanding the annular barriers by letting pressurised fluid in through the expansion opening 16 and into the annular barrier space 15.
- the first annular barrier further comprises a valve device 23 in fluid communication with the expansion opening 16, as shown in Figs. 4 and 6 .
- the valve device has a first position, in which fluid is allowed to flow from the first well tubular metal structure to the annular barrier space, as shown in Figs. 4A , 5A and a second position, providing fluid communication between the annular barrier space and the confined space, as shown in Figs. 4B , 5B .
- the sensor unit is connected with the valve device and forms part of the first annular barrier.
- valve device When having such valve device, the fluid pressure in the confined space is equalised with the pressure in the annular barrier space during temperature fluctuations, and thus by having a valve device in fluid communication with the confined space, no fracturing or leaking will occur during such temperature fluctuations.
- the pressurisation device is arranged at the top of the well tubular metal structure and in Fig. 3 , the pressurisation device is arranged in a tool 20 inserted into the first well tubular metal structure.
- the tool comprises isolation means for isolation of a part of the first well tubular metal structure opposite the expansion opening 16 for pressurising the annular barrier space 15.
- the annular barrier has a first opening 16 in fluid communication with the inside of the first well tubular metal structure and a second opening 17A in fluid communication with the annular barrier space 15, as shown in Fig. 4 .
- first opening 16 in fluid communication with the inside of the first well tubular metal structure
- second opening 17A in fluid communication with the annular barrier space 15, as shown in Fig. 4 .
- the annular barrier further comprises a bore 18A having a bore extension and comprising a first bore part 19A having a first inner diameter ID 1 , as shown in Fig. 4A , and a second bore part 120 having an inner diameter ID 2 , as shown in Fig. 4A , which is larger than that of the first bore part.
- the first opening 16 and the second opening 17A are arranged in the first bore part and are displaced along the bore extension.
- the annular barrier further comprises a piston 121 arranged in the bore. As shown in Fig.
- the piston comprises a first piston part 122 having an outer diameter OD P1 substantially corresponding to the inner diameter of the first bore part 19A and comprising a second piston part 123 having an outer diameter OD P2 substantially corresponding to the inner diameter of the second bore part 120.
- the annular barrier further comprises a rupture element 124 preventing movement of the piston until a predetermined pressure in the bore is reached.
- the piston comprises a fluid channel 125 being a through-bore providing fluid communication between the first and second bore parts.
- the rupture element is a shear disc, and in Figs. 4A and 4B the rupture element is a shear pin.
- the rupture element is selected so that the rupture element breaks at a pressure higher than the expansion pressure but lower than the pressure rupturing the expandable tubular or jeopardising the function of other completion components downhole.
- the bore and the piston 121 are arranged in a connection part 126 connecting the expandable tubular 14 with the tubular part 12.
- the bore and piston are arranged in the tubular part 12.
- the piston has a first piston end 127 at the first piston part 122 and a second piston end 128 at the second piston part 123, the first piston end having a first piston face 129 and the second piston end having a second piston face 130, and the second piston face having a face area which is larger than a face area of the first piston face in order to move the piston towards the first bore end.
- the difference in face area creates a difference in the force acting on the piston, causing the piston to move to close off the fluid communication between the first opening 16 and the second opening 17A.
- the first piston part 122 extends partly into the second bore part 120 in an initial position of the piston and forms an annular space 131 between the piston and an inner wall 132 of the bore.
- the piston movement is stopped when the second piston part reaches the first bore part, so that the second piston part rests against an annular face 133 created by the difference in inner diameter of the first and the second bore parts, which is shown in Fig. 4B .
- the annular space 131 is fluidly connected with ambient and thus pressure-relieved via a hole 61, thus allowing movement of the piston.
- the annular barrier further comprises a locking element 138 adapted to mechanically lock the piston when the piston is in the closed position blocking the first opening, as shown in Fig. 4B .
- the second piston part comprises the locking element arranged in the second piston end of the piston, the locking element being springy elements 139 projecting outwards but being suppressed in a third bore part 136 when the piston is in the initial position and the springy elements are released when the piston moves to block the first opening and the springy elements thus project radially outwards as shown in Fig. 4B .
- the locking element is collets forming in the second piston end of the piston.
- the second bore part 120 is arranged between the first bore part and the second bore part, and the third bore part has an inner diameter which is larger than the inner diameter of the second bore part.
- the expandable tubular When using a mechanical lock preventing backwards movement of the piston, there is no need for a check valve to prevent the return of the piston when the pressure inside the annular barrier increases. In this way, the risk of dirt preventing closure of the check valve and the risk that a pressure increase in the annular space of the barrier forces the piston to return and provide fluid communication from the inside of the tubular part again is thus eliminated.
- the expandable tubular has a potential risk of breaking or rupturing when fracking the formation with colder fluid, such as seawater. By permanently blocking the fluid communication between the annular space and the inside of the well tubular structure, the expandable tubular will not undergo so large changes in temperature and pressure, and thus the risk of rupturing is substantially reduced.
- the annular barrier comprises a locking element 138 which is arranged around the second piston part 123.
- the bore further comprises a third opening 137 in the second bore part 120, which third opening is in fluid communication with the annular barrier space 15 and the annulus or borehole 8.
- the sensor unit comprises a communication device 21 configured to communicate sensor data to another communication unit further up the well or to a communication module 28 in the tool shown in Fig. 3 adapted to receive the sensor data.
- the downhole completion system may further comprise one or more third annular barrier(s) 11c arranged between the first annular barrier 11a and the second annular barrier 11b.
- Each annular barrier comprises a sensor unit 18, so that the confined space 17 between the first annular barrier 11a and the third annular barrier 11c can be tested to verify the sealing properties of the first annular barrier from below which would also be the direction in which the hydrocarbon-containing fluid from the reservoir would apply pressure onto the annular barrier.
- the confined space 17 between the third annular barrier 11c and the second annular barrier 11b can be tested from below to verify sufficient sealing properties of the third annular barrier.
- the sealing abilities of the second annular barrier may be verified.
- the annular space above the first annular barrier is called the B-annulus B and this is normally not pressurised during production but may be tested during completion of the well and later on.
- the first annular barrier may comprise elastomeric seals 22 on an outside of the expandable tubular.
- the second and third annular barriers 11b, 11c are made solely of metal and have no sealing elements on the outer face of the expandable tubular.
- the downhole completion system comprises at least one annular barrier made solely of metal, preferably only annular barriers made solely of metal, so that a metal to rock seal is established between the well tubular metal structure and the cap layer.
- P&A plug and abandonment
- the downhole completion system further comprises a second well tubular metal structure 24 extending at least partly within the first well tubular metal structure and extending below the cap layer.
- the second well tubular metal structure 24 is suspended from the first well tubular metal structure and may also be called a liner hanger or a production casing.
- the second well tubular metal structure 24 extends into the reservoir for producing hydrocarbon-containing fluid and is connected with the first well tubular metal structure by means of an annular barrier or another packer.
- the second well tubular metal structure may comprise one or more annular barriers.
- the sensor unit comprises a sensor 25, such as a pressure sensor, a temperature sensor or similar sensors.
- a sensor 25 such as a pressure sensor, a temperature sensor or similar sensors.
- One sensor unit may comprise a plurality of sensors.
- the sensors may be different types of sensors so as to measure different properties of the confined space or the fluid in it.
- a borehole is drilled down through the cap layer and the extent of the cap layer is identified. Then, the first well tubular metal structure is submerged and introduced into the borehole, and the first annular barrier and the second annular barrier are arranged at least partly opposite the cap layer, so that the expandable tubular of the first annular barrier and the second annular barrier overlaps the cap layer. Subsequently, the expandable tubular of the first annular barrier and the second annular barrier is expanded to abut the inner cap layer face to enclose a confined space and provide the main barrier of the completion.
- the confined space is pressurised to a predetermined pressure by means of the valve device shifting position from a first position providing fluid communication from an inside of the first well tubular metal structure to the annular barrier space to a second position providing fluid communication between the annular barrier space and the confined space.
- the annular barrier space equalises its pressure with the confined space, and the pressure in the confined space is monitored to watch if it is kept substantially constant over a period of time to verify the sealing properties of at least one of the annular barriers against the cap layer.
- the pressure in the confined space is determined and monitored by the sensor unit.
- the step of pressurisation is performed from the top of the well or by means of a tool inserted into the first well tubular metal structure. First the expandable tubular is expanded and then the confined space is pressurised.
- a stroking tool may be used for pressurising an isolated zone opposite the expansion opening.
- the 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.
- 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.
- casing, liner or production casing is meant 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.
- the downhole tractor may have projectable arms having wheels, wherein the wheels contact the inner surface of the casing for propelling the tractor and the tool forward in the casing.
- 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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- 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)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15191258.1A EP3159478A1 (de) | 2015-10-23 | 2015-10-23 | Bohrlochvervollständigungssystemabdichtung gegen die deckschicht |
MYPI2018000038A MY193816A (en) | 2015-08-17 | 2016-08-17 | Downhole completion system sealing against the cap layer |
RU2018107599A RU2726710C2 (ru) | 2015-08-17 | 2016-08-17 | Система заканчивания скважины, обеспечивающая герметичность относительно покрывающего слоя |
MX2018001444A MX2018001444A (es) | 2015-08-17 | 2016-08-17 | Sistema de terminacion de fondo de perforacion que se sella contra la capa de cobertura. |
CN201680046651.1A CN107923230B (zh) | 2015-08-17 | 2016-08-17 | 密封盖层的井下完井系统 |
AU2016310072A AU2016310072B2 (en) | 2015-08-17 | 2016-08-17 | Downhole completion system sealing against the cap layer |
US15/238,902 US10400556B2 (en) | 2015-08-17 | 2016-08-17 | Downhole completion system sealing against the cap layer |
EP16753374.4A EP3337947A1 (de) | 2015-08-17 | 2016-08-17 | Bohrlochabschlusssystemabdichtung gegen die deckschicht |
BR112018001740-0A BR112018001740B1 (pt) | 2015-08-17 | 2016-08-17 | Sistema de conclusão de fundo de poço e método de conclusão para um sistema de conclusão de fundo de poço |
CA2993890A CA2993890A1 (en) | 2015-08-17 | 2016-08-17 | Downhole completion system sealing against the cap layer |
PCT/EP2016/069503 WO2017029319A1 (en) | 2015-08-17 | 2016-08-17 | Downhole completion system sealing against the cap layer |
SA518390934A SA518390934B1 (ar) | 2015-08-17 | 2018-02-14 | نظام إكمال في قاع البئر يُحكِم الإغلاق مع طبقة الغطاء |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15191258.1A EP3159478A1 (de) | 2015-10-23 | 2015-10-23 | Bohrlochvervollständigungssystemabdichtung gegen die deckschicht |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3159478A1 true EP3159478A1 (de) | 2017-04-26 |
Family
ID=54360159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15191258.1A Withdrawn EP3159478A1 (de) | 2015-08-17 | 2015-10-23 | Bohrlochvervollständigungssystemabdichtung gegen die deckschicht |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP3159478A1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3521551A1 (de) * | 2018-02-02 | 2019-08-07 | Welltec Oilfield Solutions AG | Vervollständigungsverfahren und vervollständigungssystem |
EP3981947A1 (de) * | 2020-10-06 | 2022-04-13 | Welltec Oilfield Solutions AG | Rückbau- und verschlusssystem |
EP4015763A1 (de) * | 2020-12-18 | 2022-06-22 | Welltec Oilfield Solutions AG | Bohrlochabschlusssystem |
WO2023141311A1 (en) * | 2022-01-24 | 2023-07-27 | Schlumberger Technology Corporation | Multiple expandable metal packers with hydrolock prevention |
RU2804472C2 (ru) * | 2018-02-02 | 2023-10-02 | Веллтек Ойлфилд Солюшнс АГ | Способ заканчивания скважины и система заканчивания скважины |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2206879A1 (de) * | 2009-01-12 | 2010-07-14 | Welltec A/S | Ringförmige Sperre und ringförmiges Absperrungssystem |
EP2599956A1 (de) * | 2011-11-30 | 2013-06-05 | Welltec A/S | Ringförmiges Barrieresystem mit Flusslinien |
EP2728111A1 (de) * | 2012-10-31 | 2014-05-07 | Welltec A/S | Drucksperrschicht-Prüfungsverfahren |
EP2853681A1 (de) * | 2013-09-30 | 2015-04-01 | Welltec A/S | Wärmeexpandierte ringförmige Barriere |
-
2015
- 2015-10-23 EP EP15191258.1A patent/EP3159478A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2206879A1 (de) * | 2009-01-12 | 2010-07-14 | Welltec A/S | Ringförmige Sperre und ringförmiges Absperrungssystem |
EP2599956A1 (de) * | 2011-11-30 | 2013-06-05 | Welltec A/S | Ringförmiges Barrieresystem mit Flusslinien |
EP2728111A1 (de) * | 2012-10-31 | 2014-05-07 | Welltec A/S | Drucksperrschicht-Prüfungsverfahren |
EP2853681A1 (de) * | 2013-09-30 | 2015-04-01 | Welltec A/S | Wärmeexpandierte ringförmige Barriere |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3521551A1 (de) * | 2018-02-02 | 2019-08-07 | Welltec Oilfield Solutions AG | Vervollständigungsverfahren und vervollständigungssystem |
WO2019149879A1 (en) * | 2018-02-02 | 2019-08-08 | Welltec Oilfield Solutions Ag | Completion method and completion system |
US11008828B2 (en) | 2018-02-02 | 2021-05-18 | Welltec Oilfield Solutions Ag | Completion method and completion system |
RU2804472C2 (ru) * | 2018-02-02 | 2023-10-02 | Веллтек Ойлфилд Солюшнс АГ | Способ заканчивания скважины и система заканчивания скважины |
EP3981947A1 (de) * | 2020-10-06 | 2022-04-13 | Welltec Oilfield Solutions AG | Rückbau- und verschlusssystem |
WO2022073955A1 (en) * | 2020-10-06 | 2022-04-14 | Welltec Oilfield Solutions Ag | Plug and abandonment system |
EP4015763A1 (de) * | 2020-12-18 | 2022-06-22 | Welltec Oilfield Solutions AG | Bohrlochabschlusssystem |
WO2022129523A1 (en) * | 2020-12-18 | 2022-06-23 | Welltec Oilfield Solutions Ag | Downhole completion system |
US11739608B2 (en) | 2020-12-18 | 2023-08-29 | Welltec Oilfield Solutions Ag | Downhole completion system |
WO2023141311A1 (en) * | 2022-01-24 | 2023-07-27 | Schlumberger Technology Corporation | Multiple expandable metal packers with hydrolock prevention |
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