EP2518263B1 - Bohrloch-Reinigungssystem - Google Patents

Bohrloch-Reinigungssystem Download PDF

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Publication number
EP2518263B1
EP2518263B1 EP11164021.5A EP11164021A EP2518263B1 EP 2518263 B1 EP2518263 B1 EP 2518263B1 EP 11164021 A EP11164021 A EP 11164021A EP 2518263 B1 EP2518263 B1 EP 2518263B1
Authority
EP
European Patent Office
Prior art keywords
tool
casing
downhole
nozzle head
cleaning system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP11164021.5A
Other languages
English (en)
French (fr)
Other versions
EP2518263A1 (de
Inventor
Jørgen HALLUNDBAEK
Helge Halvorsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Welltec AS
Original Assignee
Welltec AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DK11164021.5T priority Critical patent/DK2518263T3/en
Application filed by Welltec AS filed Critical Welltec AS
Priority to EP11164021.5A priority patent/EP2518263B1/de
Priority to EP12717715.2A priority patent/EP2702240A1/de
Priority to MX2013012441A priority patent/MX340697B/es
Priority to CN201280020768.4A priority patent/CN103502566B/zh
Priority to PCT/EP2012/057789 priority patent/WO2012146725A1/en
Priority to RU2013152078/03A priority patent/RU2592577C2/ru
Priority to AU2012247456A priority patent/AU2012247456B2/en
Priority to US14/114,300 priority patent/US20150308232A1/en
Priority to BR112013027498A priority patent/BR112013027498A2/pt
Priority to CA2834472A priority patent/CA2834472A1/en
Publication of EP2518263A1 publication Critical patent/EP2518263A1/de
Application granted granted Critical
Publication of EP2518263B1 publication Critical patent/EP2518263B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • 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
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • 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
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0078—Nozzles used in boreholes

Definitions

  • the present invention relates to a downhole cleaning system for cleaning an element inside a casing in a wellbore comprising well fluid having a wellbore pressure, comprising the casing, a wireline cleaning tool having a longitudinal direction and comprising a rotatable nozzle head having a plurality of nozzles, a tool housing having an inlet being in fluid communication with the nozzles for letting well fluid into the tool, a flow hindering element arranged on an outside of the housing, dividing the tool into a first and a second tool part and dividing the casing into a first and a second casing part and a rotatable shaft connecting the nozzle head with the housing, wherein the system further comprises a pumping device for pressurising the well fluid in the first part of casing to a pressure substantially above the wellbore pressure and above a pressure in the second part of the casing so that well fluid is pumped in through the inlet and out through the nozzles. Furthermore, the invention relates to a wireline cleaning tool and to a
  • valves are open and others closed.
  • such valves may get stuck due to precipitation scale and other particles accumulated on the valve so that the valve is stuck.
  • Known cleaning tools e.g. disclosed in US 2010/032154 , require the presence of coiled tubing on the rig or vessel in order to clean a valve in a casing within a wellbore.
  • coiled tubing is not always situated on the rig or vessel and therefore needs to be transported to the rig or vessel.
  • a downhole cleaning system for cleaning an element inside a casing in a wellbore comprising well fluid having a wellbore pressure, comprising:
  • the downhole cleaning system may comprise a control device to control the rotation of the shaft and the nozzle head.
  • control device may be an electrical motor for rotating the shaft.
  • control means may comprise a gear, a motor brake or a centrifugal brake.
  • the nozzle head may comprise a hydraulic control unit for controlling which nozzles are open and which nozzles are closed.
  • the nozzle head may comprise a hydraulic control unit for controlling a supply of fluid to each nozzle.
  • the shaft is hollow for supplying the well fluid to the nozzle head.
  • the flow hindering element is a packer, an inflatable unit, a rubber element or an elastomeric element
  • the downhole cleaning system according to the invention may further comprise a stroker being a device providing a stroking reprocicating movement of the nozzle head in relation to the longitudinal direction of the tool, or a piston interacting with a piston housing in which a spring device is arranged for providing a reprocicating movement of the nozzle head in relation to the longitudinal direction of the tool.
  • a stroker being a device providing a stroking reprocicating movement of the nozzle head in relation to the longitudinal direction of the tool, or a piston interacting with a piston housing in which a spring device is arranged for providing a reprocicating movement of the nozzle head in relation to the longitudinal direction of the tool.
  • the tool may comprise anchoring units.
  • a filter may be arranged upstream of the inlet or inside the inlet.
  • the downhole cleaning system may comprise a downhole driving unit driving the tool and itself in the casing.
  • the downhole cleaning system may comprise a measuring device measuring a rotational speed of the nozzle head.
  • the downhole cleaning system may comprise a control unit to control the measuring device from surface.
  • the nozzle head may comprise a check valve.
  • the present invention also relates to a wireline cleaning tool arranged in a casing downhole and having a longitudinal direction, comprising:
  • the invention relates to a cleaning method comprising the steps of entering a wireline cleaning tool of the system according to the invention into a casing, activating the pumping device and pressurising the first casing part, turning the nozzle head and cleaning a casing element by letting well fluid in through the inlet in the pressurised first casing part and out through nozzles in the second casing part.
  • Fig. 1 shows a downhole cleaning system 1 for cleaning an element 2, such as a gas lift valve, a sleeve or a side pocket mandrel, in a casing 3 in a wellbore 4 comprising well fluid 5 having a well fluid pressure Pw.
  • the downhole cleaning system 1 comprises the casing 3 and a wireline cleaning tool 10.
  • the wireline cleaning tool 10 has a longitudinal direction 11, and comprises in the end furthest away from the surface a rotatable nozzle head 12 having a plurality of nozzles 13 for cleaning the gas lift valve by jetting high pressurised well fluid towards the valve.
  • the cleaning operation can be performed anywhere in the well, also in the more horizontal parts of the well. No landing nipple is required in order to perform a cleaning operation.
  • the system is easy to use, and the cleaning tool is easily retrieved from the well by pulling in the wireline.
  • the wireline cleaning tool 10 has a tool housing 14 having an inlet 15 for letting well fluid into the tool 10, and the inlet 15 is inside the tool in fluid communication with the nozzles 13.
  • the well fluid travels in through the inlet and out through the nozzle head, illustrated with arrows.
  • the wireline cleaning tool 10 is submerged into the casing 3 in the well, and a flow hindering element 16 arranged on an outside 17 of the housing 14 is set or inflated so that it divides the casing 3 in a first 20 and a second casing part 21.
  • the well fluid in the first casing part 21 can be pressurised from the top of the well by a pumping device 23 and the fluid is forced into the inlets 15 and out through the nozzles in order to clean the casing or elements therein.
  • the second part of the casing 21 has a substantially lower well fluid pressure so that the high pressurised well fluid in the first part 20 can be ejected as jets in the well fluid in the second part of the casing.
  • the casing is used as the coiled tubing or drill pipe in order to provide the nozzles with high pressurised fluid; however, the fluid jetted from the nozzles is not a special cleaning fluid but merely the well fluid surrounding the tool.
  • the environment surrounding the gas lift valve to be cleaned is not interfered.
  • the wireline cleaning tool 10 is connected with a wireline 41.
  • the tool comprises an electronic section 30, a motor 31, a pump 32 and an anchoring device 33 in a first tool part 18 above the flow hindering element 16.
  • the nozzle head 12 is arranged in a second tool part 19 below the flow hindering element 16.
  • the tool 10 is shown having a rotatable shaft 22 connecting the nozzle head 12 with the housing 14.
  • the rotation of the shaft is controlled by a control device 24 in the form of an electrical motor having a gear, a motor brake or a centrifugal brake 25.
  • the shaft 22 is hollow and in fluid communication with the inlet 15 for supplying well fluid to the nozzles 13 of the nozzle head 12.
  • the shaft 22 is connected with the motor control device 24, which controls the rotation of the nozzle head 12 while fluid is jetted out through the nozzles 13.
  • the well fluid jet stream 43 ejected from the nozzles would loose its effect as fluid ejected through the nozzles would then force the nozzle head to rotate too fast, resulting in the jet stream being spread along an inner circumference of the casing and not ejected as a straight line in the radially direction of the casing.
  • the flow hindering element 16 is shown as a rubber element being squeezed in the longitudinal direction 11 of the tool between two rings 42 forcing the rubber element radially outwards to seal against the casing at a pressure of 3,000-5,000 PSI.
  • the flow hindering element could also be a packer, an inflatable unit or an elastomeric element.
  • the flow hindering element does not necessarily have to seal against the inner wall of the casing in order to be able to create a pressure difference between the first and upper part of the casing and the second and lower part of the casing.
  • the tool 10 is anchored up inside the casing 3 by means of anchoring units 35 so that the nozzle head 12 is arranged outside a target area to be cleaned.
  • the flow hindering element 16 is then inflated or set, and the pumping device 23 pressurising the well fluid in the first and top part of the casing 20 is activated.
  • High pressurised fluid is subsequently jetted as a jet stream out through the nozzles 13 of the nozzle head 12 as the nozzle head turns in a controlled manner so that the jet streams do not loose too much jetting power.
  • the nozzle head comprises a hydraulic control unit for controlling which of the nozzles that jet fluid to clean a valve or the like element.
  • the hydraulic control unit controls the openings and closings of the nozzles and/or the supply of fluid to each nozzle.
  • Fig. 1 only two of the nozzles jet fluid into the casing in order to clean an element, such as a valve.
  • Fig. 2 only one nozzle jets fluid. If a high fluid velocity is needed in order to clean an object, the hydraulic control unit only lets one nozzle jet at a time. However, if a high volume of fluid is needed, the hydraulic control unit lets several nozzles jet.
  • the hydraulic control unit has means to control in which angles along the circumference of the nozzle head the nozzles are to jet so that their jet hits against the element to be cleaned.
  • the tool may have means for moving the nozzle head in a reprocicating movement.
  • a piston 26 interacting with a piston housing 27 in which a spring device 28 is arranged provides a reprocicating movement of the nozzle head 12 in relation to the longitudinal direction 11 1 of the tool 10.
  • the tool 10 comprises a stroker 29 being a device providing a stroking reprocicating movement of the nozzle head 12 in relation to the longitudinal direction 11 of the tool 10. The reprocicating movement of the nozzle head 12 is illustrated by a double arrow in Fig. 3 .
  • the wireline cleaning tool comprises a filter 36 arranged upstream of the inlet 15 or in the inlet.
  • the filter 36 or screen surrounds the part of the tool 10 having the inlet 15.
  • the tool 10 comprises several inlets all in fluid communication with the hollow shaft.
  • the hollow shaft may be internally sectionised having an internal frame structure to strengthen the shaft.
  • the downhole cleaning system 1 may further comprise a downhole driving unit 37 driving the tool 10 and itself forward in the casing 3.
  • the driving unit 37 has wheels on arms and can be used as the anchoring device in order to set the packer.
  • the downhole cleaning system 1 may also comprise a measuring device 38 measuring a rotational speed of the nozzle head 12.
  • the measuring device 38 may be arranged in the motor control device 24 around the shaft 22 so that the nozzle head is controlled to rotate at a speed lower than 30 RPM, preferably lower than 25 RPM and more preferably lower than 20 RPM.
  • the control device 24 may be controlled from above surface by means of a control unit 39 shown in Fig. 4 .
  • a logging unit of the cleaning tool can investigate the casing to see which part or element of the casing needs to be cleaned and if the part or element to be cleaned is properly cleaned.
  • the nozzle head 12 may further comprise a check valve 40 in an end opposite the end connected with the shaft 22.
  • the tool 10 may comprise a chamber with a cleaning fluid which is mixed with the well fluid before being jetted out through the nozzles 13.
  • fluid or well fluid any kind of fluid which 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.
  • high pressurised fluid fluid flowing at a volume flow rate of at least 250 L/min, preferably at least 300 L/min and even more preferably 350 L/min.
  • 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 system 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®.

Landscapes

  • 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)
  • Cleaning In General (AREA)
  • Nozzles (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Earth Drilling (AREA)

Claims (15)

  1. Wireline-Reinigungswerkzeug (10), das in einer Verrohrung unten in einem Bohrloch eingerichtet ist und das eine Längsrichtung (11) hat, Folgendes umfassend:
    - einen drehbaren Düsenkopf (12), der mehrere Düsenöffnungen (13) hat,
    - ein Werkzeuggehäuse (14), das einen Einlass (15) hat, der in einer Fluidverbindung mit den Düsenöffnungen steht, um Bohrlochfluid in das Werkzeug hinein und durch die Düsenöffnungen nach außen zu lassen,
    - ein Flusserschwerungselement (16), das auf einer Außenseite (17) des Gehäuses angeordnet ist und das das Werkzeug in einen ersten (18) und einen zweiten (19) Werkzeugteil unterteilt und die Verrohrung in einen ersten (20) und einen zweiten (21) Verrohrungsteil unterteilt, und
    - eine drehbare Welle (22), die den Düsenkopf mit dem Gehäuse verbindet, wobei die Welle eine Hohlwelle ist, um die Düsenöffnungen mit Bohrlochfluid zu versorgen,
    dadurch gekennzeichnet, dass das Wireline-Reinigungswerkzeug außerdem eine Steuervorrichtung (24) umfasst, um die Drehung der Welle und des Düsenkopfs zu steuern.
  2. Wireline-Reinigungswerkzeug nach Anspruch 1, das außerdem in einem ersten Werkzeugteil (18) oberhalb des Flusserschwerungselements einen Elektronikabschnitt (30), einen Motor (31), eine Pumpe (32) und eine Verankerungsvorrichtung (33) umfasst.
  3. Bohrloch-Reinigungssystem (1) zum Reinigen eines Elements (2) im Inneren einer Verrohrung (3) in einem Förderbohrloch (4), das Bohrlochfluid (5) umfasst, das einen Förderbohrlochdruck (Pw) hat, Folgendes umfassend:
    - die Verrohrung, und
    - ein Wireline-Reinigungswerkzeug (10) nach einem der Ansprüche 1 oder 2, wobei das System außerdem eine Pumpvorrichtung (23, 32) umfasst, um das Bohrlochfluid im ersten Teil der Verrohrung unter Druck zu setzen, und dies auf einen Druck, der erheblich über dem Förderbohrlochdruck und über einem Druck im zweiten Teil der Verrohrung liegt, derart, dass Bohrlochfluid durch den Einlass hinein und durch die Düsenöffnungen heraus gepumpt wird.
  4. Bohrloch-Reinigungssystem nach Anspruch 3, wobei die Steuervorrichtung ein Elektromotor zum Drehen der Welle ist.
  5. Bohrloch-Reinigungssystem nach Anspruch 3 oder 4, wobei das Steuermittel ein Getriebe, eine Motorbremse oder eine Zentrifugalbremse (25) umfasst.
  6. Bohrloch-Reinigungssystem nach einem der Ansprüche 3 bis 5, wobei die Welle hohl ist, um das Bohrlochfluid zum Düsenkopf zu führen.
  7. Bohrloch-Reinigungssystem nach Anspruch 6, wobei das Flusserschwerungselement ein Packer, eine aufblasbare Einheit, ein Gummielement oder ein elastomeres Element ist.
  8. Bohrloch-Reinigungssystem nach einem der Ansprüche 3 bis 7, das außerdem eine Hubvorrichtung (29) umfasst, die eine Vorrichtung ist, die eine hin- und herlaufende Hubbewegung des Düsenkopfs relativ zur Längsrichtung des Werkzeugs bereitstellt, oder einen Kolben (26), der mit einem Kolbengehäuse (27) zusammenarbeitet, in dem eine Federvorrichtung (28) angeordnet ist, um eine hin- und herlaufende Bewegung des Düsenkopfs relativ zur Längsrichtung des Werkzeugs bereitzustellen.
  9. Bohrloch-Reinigungssystem nach einem der Ansprüche 3 bis 8, wobei das Werkzeug Verankerungseinheiten (35) umfasst.
  10. Bohrloch-Reinigungssystem nach einem der Ansprüche 3 bis 9, wobei stromaufwärts vom Einlass oder innerhalb des Einlasses ein Filter (36) angeordnet ist.
  11. Bohrloch-Reinigungssystem nach einem der Ansprüche 3 bis 10, das außerdem eine Bohrloch-Antriebseinheit (37) umfasst, die das Werkzeug und sich selbst in der Verrohrung antreibt.
  12. Bohrloch-Reinigungssystem nach einem der Ansprüche 3 bis 11, das außerdem eine Messvorrichtung (38) umfasst, die eine Drehgeschwindigkeit des Düsenkopfs misst.
  13. Bohrloch-Reinigungssystem nach Anspruch 12, das außerdem eine Steuereinheit (39) zur Steuerung der Messvorrichtung von der Oberfläche umfasst.
  14. Bohrloch-Reinigungssystem nach Anspruch 13, wobei der Düsenkopf ein Sperrventil (40) umfasst.
  15. Reinigungsverfahren, die folgenden Schritte umfassend:
    - Einbringen eines Wireline-Reinigungswerkzeugs des Systems nach einem der Ansprüche 3 bis 14 in eine Verrohrung,
    - Aktivieren der Pumpenvorrichtung und unter Druck Setzen des ersten Verrohrungsteils,
    - Drehen des Düsenkopfs,
    - Reinigen eines Verrohrungselements dadurch, dass Bohrlochfluid in dem unter Druck stehenden ersten Verrohrungsteil durch den Einlass eingelassen und durch Düsenöffnungen im zweiten Verrohrungsteil ausgelassen wird.
EP11164021.5A 2011-04-28 2011-04-28 Bohrloch-Reinigungssystem Not-in-force EP2518263B1 (de)

Priority Applications (11)

Application Number Priority Date Filing Date Title
EP11164021.5A EP2518263B1 (de) 2011-04-28 2011-04-28 Bohrloch-Reinigungssystem
DK11164021.5T DK2518263T3 (en) 2011-04-28 2011-04-28 Downhole cleaning system
BR112013027498A BR112013027498A2 (pt) 2011-04-28 2012-04-27 sistema de limpeza de fundo de poço
CN201280020768.4A CN103502566B (zh) 2011-04-28 2012-04-27 井下清洁系统
PCT/EP2012/057789 WO2012146725A1 (en) 2011-04-28 2012-04-27 Downhole cleaning system
RU2013152078/03A RU2592577C2 (ru) 2011-04-28 2012-04-27 Скважинная очищающая система
EP12717715.2A EP2702240A1 (de) 2011-04-28 2012-04-27 Bohrlochreinigungssystem
US14/114,300 US20150308232A1 (en) 2011-04-28 2012-04-27 Downhole cleaning system
MX2013012441A MX340697B (es) 2011-04-28 2012-04-27 Sistema de limpieza del fondo de la perforacion.
CA2834472A CA2834472A1 (en) 2011-04-28 2012-04-27 Downhole cleaning system
AU2012247456A AU2012247456B2 (en) 2011-04-28 2012-04-27 Downhole cleaning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11164021.5A EP2518263B1 (de) 2011-04-28 2011-04-28 Bohrloch-Reinigungssystem

Publications (2)

Publication Number Publication Date
EP2518263A1 EP2518263A1 (de) 2012-10-31
EP2518263B1 true EP2518263B1 (de) 2014-11-05

Family

ID=46022244

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11164021.5A Not-in-force EP2518263B1 (de) 2011-04-28 2011-04-28 Bohrloch-Reinigungssystem
EP12717715.2A Withdrawn EP2702240A1 (de) 2011-04-28 2012-04-27 Bohrlochreinigungssystem

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP12717715.2A Withdrawn EP2702240A1 (de) 2011-04-28 2012-04-27 Bohrlochreinigungssystem

Country Status (10)

Country Link
US (1) US20150308232A1 (de)
EP (2) EP2518263B1 (de)
CN (1) CN103502566B (de)
AU (1) AU2012247456B2 (de)
BR (1) BR112013027498A2 (de)
CA (1) CA2834472A1 (de)
DK (1) DK2518263T3 (de)
MX (1) MX340697B (de)
RU (1) RU2592577C2 (de)
WO (1) WO2012146725A1 (de)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
RU2795009C1 (ru) * 2022-05-27 2023-04-27 Салават Анатольевич Кузяев Способ исследования скважин и интенсификации нефтегазовых притоков и струйный насос для его осуществления

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US9695673B1 (en) * 2012-11-28 2017-07-04 Oilfield Solutions and Design, LLC Down hole wash tool
WO2017142504A1 (en) * 2016-02-15 2017-08-24 Halliburton Energy Services, Inc. Downhole radial cleanout tool
US12018537B2 (en) * 2022-03-29 2024-06-25 Saudi Arabian Oil Company Sand flushing above blanking plug
US12044115B2 (en) 2022-03-29 2024-07-23 Saudi Arabian Oil Company Electric submersible pumping system blanking plug with flapper valve mechanism
US20240102361A1 (en) * 2022-09-28 2024-03-28 TD Tools, Inc. Wash tool apparatus and method of using the same

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RU2114983C1 (ru) * 1997-03-13 1998-07-10 Ибрагимов Лечи Хамзатович Устройство для очистки и обработки скважины
GB2324818B (en) * 1997-05-02 1999-07-14 Sofitech Nv Jetting tool for well cleaning
GB2335213B (en) * 1998-03-09 2000-09-13 Sofitech Nv Nozzle arrangement for well cleaning apparatus
NL1019136C2 (nl) * 2001-10-08 2003-04-09 Johannes Sprengers Gereedschap voor het reinigen van boorputten.
US7874366B2 (en) * 2006-09-15 2011-01-25 Schlumberger Technology Corporation Providing a cleaning tool having a coiled tubing and an electrical pump assembly for cleaning a well
RU2339790C1 (ru) * 2007-05-17 2008-11-27 ООО "РН-УфаНИПИнефть" Установка для очистки скважин
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EP2339110A1 (de) * 2009-12-23 2011-06-29 Welltec A/S Bohrlochwerkzeug zur Bohrlochreinigung oder zum Transport von Flüssigkeit in einem Bohrloch

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2795009C1 (ru) * 2022-05-27 2023-04-27 Салават Анатольевич Кузяев Способ исследования скважин и интенсификации нефтегазовых притоков и струйный насос для его осуществления

Also Published As

Publication number Publication date
EP2518263A1 (de) 2012-10-31
CA2834472A1 (en) 2012-11-01
RU2592577C2 (ru) 2016-07-27
MX340697B (es) 2016-07-21
US20150308232A1 (en) 2015-10-29
CN103502566B (zh) 2016-11-16
AU2012247456A1 (en) 2013-05-02
AU2012247456B2 (en) 2015-07-09
MX2013012441A (es) 2013-12-02
DK2518263T3 (en) 2015-01-26
CN103502566A (zh) 2014-01-08
BR112013027498A2 (pt) 2017-01-10
RU2013152078A (ru) 2015-06-10
EP2702240A1 (de) 2014-03-05
WO2012146725A1 (en) 2012-11-01

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