EP3115546A1 - Bohrlochsystem zum entladen von flüssigkeit - Google Patents
Bohrlochsystem zum entladen von flüssigkeit Download PDFInfo
- Publication number
- EP3115546A1 EP3115546A1 EP15175551.9A EP15175551A EP3115546A1 EP 3115546 A1 EP3115546 A1 EP 3115546A1 EP 15175551 A EP15175551 A EP 15175551A EP 3115546 A1 EP3115546 A1 EP 3115546A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- metal structure
- production
- tubular metal
- annulus
- 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- Withdrawn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
- 239000007788 liquid Substances 0.000 title claims abstract description 81
- 238000004519 manufacturing process Methods 0.000 claims abstract description 102
- 239000002184 metal Substances 0.000 claims abstract description 70
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 10
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 239000004215 Carbon black (E152) Substances 0.000 claims description 3
- 229930195733 hydrocarbon Natural products 0.000 claims description 3
- 150000002430 hydrocarbons Chemical class 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 48
- 239000003921 oil Substances 0.000 description 9
- 241001147444 Giardia lamblia virus Species 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000012267 brine Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001914 filtration Methods 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
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
- E21B43/123—Gas lift valves
Definitions
- the present invention relates to a downhole system for unloading a liquid of a well in an annulus between an intermediate casing and a production tubular metal structure. Furthermore, the present invention relates to a liquid unloading method for unloading liquid of a well in an annulus between an intermediate casing and a production tubular metal structure.
- GLV gas lift valves
- Known conventional gas lift valves are designed in such a way that the GLV nearest the top opens at one pressure and the next at another pressure. The first GLV then closes at a registered pressure drop.
- Each GLV is thus designed to be self-operating and designed from the dimensions of the intermediate casing, the production casing and the pressure available at the top. If the GLVs are not designed correctly, the liquid un-loading procedure fails, e.g. if one GLV does not open or another does not close in a certain order.
- the GLVs are often designed to close dependent on a pressure drop, which may fail if the GLV does not detect the pressure drop.
- the failing GLV can then be replaced from within the production casing by intervening the well with a kick-over tool, but the valve needs to be set in either an open or a closed position, depending on the situation, in order for the unloading procedure to be re-established. If the GLV is not in the right position, the unloading procedure cannot be initiated.
- a downhole system for unloading a liquid of a well in an annulus between an intermediate casing and a production tubular metal structure comprising:
- the downhole system may further comprise a downhole tool for operating the sliding sleeve between the open and the closed position of the sliding sleeve.
- each liquid unloading assembly may have an outer diameter which is less than 20% larger than the outer diameter of the production tubular metal structure.
- each liquid unloading assembly may comprise a plurality of check valves.
- each liquid unloading assembly may comprise a plurality of assembly inlets, each assembly inlet being fluidly connected with the inlet of one of the check valves.
- first inner diameter of the production tubular metal structure may be substantially equal to the second inner diameter of the tubular part of the liquid unloading assembly.
- the sliding sleeve may have a third inner diameter which is substantially equal to the first inner diameter of the production tubular metal structure.
- the downhole system may further comprise a liner hanger casing and a second production packer, the liner hanger casing being arranged between the first production packer and the second production packer, which second production packer may be arranged between the liner hanger casing and the production tubular metal structure.
- check valve assemblies may be arranged below the first production packer.
- the tool may comprise a detection unit configured to detect the presence of gas in the production tubular metal structure.
- the tool may comprise a driving unit, such as a downhole tractor.
- the present invention furthermore relates to a liquid unloading method for unloading liquid of a well in an annulus between an intermediate casing and a production tubular metal structure, comprising the steps of:
- the step of detecting a gas may be performed at the top of the well or by means of the tool.
- liquid unloading method may further comprise the step of closing the second check valve.
- liquid unloading method may further comprise the step of producing hydrocarbon-containing fluid.
- Fig. 1 shows a downhole system 1 for unloading a liquid 2 of a well 3 in an annulus 4 between an intermediate casing 5 and a production tubular metal structure 6.
- the production tubular metal structure 6 has a first inner diameter ID1 which is not substantially decreased from top to bottom, and the production tubular metal structure is partly arranged in the intermediate casing 5, thereby defining the annulus, and extends below the intermediate casing.
- a production packer 9, also called a main packer, is arranged between the intermediate casing 5 and production tubular metal structure 6 to enclose part of the annulus 4.
- the well 3 is filled with liquid in the annulus 4, and the liquid must be unloaded before production can begin.
- the downhole system 1 comprises a pump 7 at a top 8 of the well 3, configured to pressurise the annulus 4 with gas 20 from the top to displace the liquid in the annulus through a first liquid unloading assembly 10A, 10 and a second liquid unloading assembly 10B, 10.
- the first liquid unloading assembly is arranged closer to the top 8 than the second liquid unloading assembly so that the gas enters the first liquid unloading assembly first and then flows into an inside 30 of the production tubular metal structure 6.
- the first liquid unloading assembly 10A When gas is detected on the inside 30 of the production tubular metal structure 6, the first liquid unloading assembly 10A is closed by means of a tool 40, as shown in Fig. 2 , so that the gas is forced to displace the liquid vertically in the annulus below the first liquid unloading assembly and then enter the second liquid unloading assembly.
- the tool 40 comprises engagement means 41, such as keys, for engaging a profile 42 in a sliding sleeve 18 of the liquid unloading assembly 10.
- each liquid unloading assembly 10 comprises a tubular part 11 having a wall 12 and a check valve 16 connected with an outer face 14 of the wall.
- the tubular part 11 is mounted as part of the production tubular metal structure 6, and the wall of the tubular part 11 has a second inner diameter ID2 which is at least equal to the first inner diameter ID1 of the production tubular metal structure 6.
- the wall 12 has an aperture 15, and the check valve 16 has an outlet 17 in fluid communication with the aperture through a fluid channel 22.
- Each liquid unloading assembly 10 comprises a sliding sleeve 18 arranged to slide along an inner face 19 of the tubular part 11 between an open position and a closed position to open or close the aperture 15.
- the liquid unloading assembly 10 has almost the same inner diameter as the production tubular metal structure 6.
- the sliding sleeve 18 has a third inner diameter ID3 which is substantially equal to the first inner diameter ID1 of the production tubular metal structure 6.
- the check valve 16 has an inlet 17 in fluid communication with the annulus 4 for letting gas into the inside of the production tubular metal structure 6.
- the check valve 16 has an outlet 23 in fluid communication with the aperture 15 of the tubular part 11.
- the check valve 16 comprises a spring element 36 which is compressible when a ball 37 is moved in the axial extension of the liquid unloading assembly 10 by gas entering through the inlet 17.
- a filtering element 38 is arranged in the inlet to prevent particles in the gas from entering through the check valve 16.
- the check valve 16 is a conventional non-return valve or one-way valve allowing fluid (liquid or gas) to flow through it in only one direction from the annulus to the inside of the production tubular metal structure 6.
- the liquid-unloading procedure is very simple and does not rely on the gas lift valve to be open and close at certain predetermined pressures.
- the known conventional gas lift valves are designed so that one GLV opens at one pressure and the next at another pressure.
- Each GLV is thus designed to be self-operating and designed from the dimensions of the intermediate casing, the production casing and the pressure available at the top. If the GLVs are not designed correctly, the liquid un-loading procedure fails, e.g. if one GLV does not open or another does not close in a certain order.
- the GLVs are often designed to close dependent on a pressure drop, which may fail.
- the failing GLV can then be replaced from within the production casing and the unloading procedure re-established.
- a downhole system of the present invention having small, simple check valves and a sliding sleeve operated by a tool for opening and closing the valve assembly, the system has a much simpler design which is less expensive, and the risk of failure is also substantially reduced.
- the open and closed positions of the check valve 16 are controlled by the tool sliding a sliding sleeve 18 to uncover the aperture 15 of the tubular part 11 and thus allow gas to flow into the production tubular metal structure 6.
- the sliding sleeve 18 is shown in its closed position covering the aperture 15 and thus preventing gas from flowing into the production tubular metal structure 6 through that check valve 16.
- the function of the check valve 16 is only to let fluid into the production tubular metal structure 6 and prevent fluid from the inside of the production tubular metal structure from flowing into the annulus.
- the check valve 16 can thus have a simple design, and every check valve positioned along the production tubular metal structure 6 can have the same simple design with the risk of not matching the dimensions of the well to open and close dependent on pressure and/or pressure difference.
- the check valve 16 can be arranged outside the production tubular metal structure 6 and therefore does not limit the inner diameter of the production tubular metal structure or increase the outer diameter of the production tubular metal structure.
- the liquid unloading assembly 10 comprises a plurality of assembly inlets 24, and each liquid unloading assembly comprises a plurality of check valves so that each assembly inlet 24 is fluidly connected with an inlet of one of the check valves.
- the liquid unloading assembly 10 may have two assembly inlets 24 fluidly connected with one check valve.
- each liquid unloading assembly 10 has an outer diameter OD2 which is less than 20% larger than the outer diameter OD1 of the production tubular metal structure 6.
- the downhole system 1 further comprises a liner hanger casing 26 and a second production packer 9B.
- the liner hanger casing 26 is arranged between the first production packer 9A and the second production packer 9B.
- the second production packer 9B is arranged between the liner hanger casing 26 and the production tubular metal structure 6.
- the annulus 4 is defined by the production tubular metal structure 6, the intermediate casing 5, the liner hanger casing 26 and the first and second production packers 9, 9A, 9B.
- each liquid unloading assembly 10 has an outer diameter OD2 (shown in Fig. 3 ) which is less than 20% larger than the outer diameter OD1 (shown in Fig. 3 ) of the production tubular metal structure 6, the liquid unloading assembly 10 can be arranged substantially further down the well 3 opposite the liner hanger casing without increasing the outer diameter of the intermediate casing 5.
- the gas lift valves increase the outer diameter of the production casing by at least 50%, and therefore, the gas lift valves cannot be arranged as deep in the well as the check valves of Fig. 6 .
- the liquid unloading is not as efficient as the downhole system of the present invention, and by being able to arrange the liquid un-loading assemblies deeper in the well, the liquid-unloading has a much high success rate.
- check valves positioned much further down the well provide gas lift deeper in the well, thereby lifting a higher/longer liquid column and thus providing a more efficient gas lift if needed.
- some of the check valve assemblies 10 are arranged below the first production packer 9A but are still in fluid communication with the A-annulus, and some of the check valves are arranged above the first production packer.
- Fig. 7 some of the check valve assemblies 10 are arranged below the first production packer 9A but are still in fluid communication with the A-annulus, and some of the check valves are arranged above the first production packer.
- the downhole system comprises ten check valve assemblies 10, 10A-10J.
- the first check valve assembly 10A is arranged closest to the top of the well, and the next check valve assembly 10 is the second check valve assembly 10B, and so on all the way down to the tenth check valve assembly 10J through which the gas flows when the gas has entered all nine of the check valve assemblies 10A-10I arranged above.
- Each check valve assembly 10A-J is closed by the tool in succession of each other, and the first check valve assembly 10A is closed first, the second check valve assembly 10B closed secondly, and so forth.
- One way of detecting gas entering the first check valve 16 may be to detect if the fluid flowing out of the well at the top of the well contains gas.
- the downhole tool 40 comprises a detection unit 44 which is configured to detect the presence of gas in the production tubular metal structure 6, as shown in Fig. 2 .
- the detection unit 44 may comprise an ultrasonic or acoustic sensor, a capacitance sensor or a similar sensor for detecting a change in the flow and the fluid content.
- the downhole tool may also comprise a driving unit 45, such as a downhole tractor.
- the annulus 4 is pressurised with gas to displace the liquid from the top of the well 3 in through the first check valve 16 arranged outside the wall of the tubular part and the production tubular metal structure 6.
- the first check valve is closed by means of the tool to force the gas further down the well, displacing liquid towards the second check valve in through the second check valve. If the first check valve stayed open, the liquid displacement would not be as efficient or could completely stop.
- the gas displaces the liquid, the gas is aligned with the second check valve and is let through the second check valve into the production tubular metal structure 6.
- the production tubular metal structure 6 may also comprise an annular barrier 50 having a tubular metal part mounted as part of the production tubular metal structure.
- the annular barrier 50 comprises an expandable sleeve 51 expanded by letting pressurised fluid in through an expansion opening 52.
- 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 By a casing, production tubular metal structure, production casing, intermediate casing, or liner hanger 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 45 can be used to push the tool all the way into position in the well, as shown in Fig. 2 .
- 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®.
Landscapes
- 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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15175551.9A EP3115546A1 (de) | 2015-07-06 | 2015-07-06 | Bohrlochsystem zum entladen von flüssigkeit |
DK16732649.5T DK3314086T3 (da) | 2015-06-29 | 2016-06-28 | Borehulssystem til væsketømning |
MYPI2017001709A MY187477A (en) | 2015-06-29 | 2016-06-28 | Downhole system for unloading liquid |
US15/194,955 US10597989B2 (en) | 2015-06-29 | 2016-06-28 | Downhole system for unloading liquid |
CA2988365A CA2988365A1 (en) | 2015-06-29 | 2016-06-28 | Downhole system for unloading liquid |
BR112017025597-9A BR112017025597B1 (pt) | 2015-06-29 | 2016-06-28 | Método e sistema de fundo de poço para descarregar um líquido de um poço em um espaço anular entre um revestimento intermediário e uma estrutura de metal tubular de produção |
MX2017016242A MX2017016242A (es) | 2015-06-29 | 2016-06-28 | Sistema de fondo de perforacion para descargar liquido. |
EP16732649.5A EP3314086B1 (de) | 2015-06-29 | 2016-06-28 | Bohrlochsystem zum entladen von flüssigkeit |
CN201680033545.XA CN107743540A (zh) | 2015-06-29 | 2016-06-28 | 用于卸载液体的井下系统 |
RU2017143015A RU2721041C2 (ru) | 2015-06-29 | 2016-06-28 | Скважинная система для откачивания жидкости |
PCT/EP2016/065008 WO2017001401A1 (en) | 2015-06-29 | 2016-06-28 | Downhole system for unloading liquid |
AU2016287259A AU2016287259B2 (en) | 2015-06-29 | 2016-06-28 | Downhole system for unloading liquid |
SA517390515A SA517390515B1 (ar) | 2015-06-29 | 2017-12-11 | نظام أسفل البئر لتفريغ سائل |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15175551.9A EP3115546A1 (de) | 2015-07-06 | 2015-07-06 | Bohrlochsystem zum entladen von flüssigkeit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3115546A1 true EP3115546A1 (de) | 2017-01-11 |
Family
ID=53514085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15175551.9A Withdrawn EP3115546A1 (de) | 2015-06-29 | 2015-07-06 | Bohrlochsystem zum entladen von flüssigkeit |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP3115546A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022182367A1 (en) * | 2021-02-27 | 2022-09-01 | Halliburton Energy Services, Inc. | Packer sub with check valve |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2917004A (en) * | 1954-04-30 | 1959-12-15 | Guiberson Corp | Method and apparatus for gas lifting fluid from plural zones of production in a well |
US3606584A (en) * | 1969-02-19 | 1971-09-20 | Otis Eng Co | Well tools |
US20080164033A1 (en) * | 2007-01-04 | 2008-07-10 | Altec, Inc. | Gas well de-watering apparatus and method |
US20100294506A1 (en) * | 2009-05-21 | 2010-11-25 | Bp Corporation North America Inc. | Systems and methods for deliquifying a commingled well using natural well pressure |
US20140318770A1 (en) * | 2011-11-30 | 2014-10-30 | Welltec A/S | Pressure integrity testing system |
CA2829630A1 (en) * | 2013-10-11 | 2015-04-11 | Raise Production, Inc. | Crossover valve system and method for gas production |
-
2015
- 2015-07-06 EP EP15175551.9A patent/EP3115546A1/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2917004A (en) * | 1954-04-30 | 1959-12-15 | Guiberson Corp | Method and apparatus for gas lifting fluid from plural zones of production in a well |
US3606584A (en) * | 1969-02-19 | 1971-09-20 | Otis Eng Co | Well tools |
US20080164033A1 (en) * | 2007-01-04 | 2008-07-10 | Altec, Inc. | Gas well de-watering apparatus and method |
US20100294506A1 (en) * | 2009-05-21 | 2010-11-25 | Bp Corporation North America Inc. | Systems and methods for deliquifying a commingled well using natural well pressure |
US20140318770A1 (en) * | 2011-11-30 | 2014-10-30 | Welltec A/S | Pressure integrity testing system |
CA2829630A1 (en) * | 2013-10-11 | 2015-04-11 | Raise Production, Inc. | Crossover valve system and method for gas production |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022182367A1 (en) * | 2021-02-27 | 2022-09-01 | Halliburton Energy Services, Inc. | Packer sub with check valve |
US11466539B2 (en) | 2021-02-27 | 2022-10-11 | Halliburton Energy Services, Inc. | Packer sub with check valve |
GB2616559A (en) * | 2021-02-27 | 2023-09-13 | Halliburton Energy Services Inc | Packer sub with check valve |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2012242913B2 (en) | Sliding sleeve valve stage cementing tool and method | |
CA2520944C (en) | Plunger lift system | |
US8479808B2 (en) | Downhole tools having radially expandable seat member | |
US9540913B2 (en) | Method and apparatus for actuating a differential pressure firing head | |
DK2785965T3 (en) | An annular barrier system with a flow pipe | |
AU2016268394B2 (en) | Multi-function dart | |
US9638011B2 (en) | System and method for actuating downhole packers | |
CA2627822C (en) | Top hold down rod pump with hydraulically activated drain and method of use | |
WO2021086496A1 (en) | Self-adjusting gas lift system | |
US20160376868A1 (en) | Downhole packer tool | |
EP3314086B1 (de) | Bohrlochsystem zum entladen von flüssigkeit | |
US20160153268A1 (en) | A gas lift system and a gas lift method | |
EP3115546A1 (de) | Bohrlochsystem zum entladen von flüssigkeit | |
EP2813669A1 (de) | Abschlussverfahren und Bohrlochsystem | |
US10982514B2 (en) | Tubing and annular gas lift | |
US20150308227A1 (en) | Pressure regulated downhole equipment | |
US20210054717A1 (en) | Gas venting in subterranean wells | |
RU2777032C1 (ru) | Комплект оборудования для многостадийного гидроразрыва пласта | |
WO2016156187A1 (en) | Method and system for operating a gas well |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20170712 |