EP3375973A1 - Bohrlochwerkzeugstrang - Google Patents

Bohrlochwerkzeugstrang Download PDF

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Publication number
EP3375973A1
EP3375973A1 EP17160609.8A EP17160609A EP3375973A1 EP 3375973 A1 EP3375973 A1 EP 3375973A1 EP 17160609 A EP17160609 A EP 17160609A EP 3375973 A1 EP3375973 A1 EP 3375973A1
Authority
EP
European Patent Office
Prior art keywords
tool
downhole
camera
tool string
shroud
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Withdrawn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
EP17160609.8A
Other languages
English (en)
French (fr)
Inventor
Christian Krüger
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 EP17160609.8A priority Critical patent/EP3375973A1/de
Publication of EP3375973A1 publication Critical patent/EP3375973A1/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Withdrawn legal-status Critical Current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
    • E21B31/00—Fishing for or freeing objects in boreholes or wells
    • E21B31/12—Grappling tools, e.g. tongs or grabs
    • 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
    • E21B31/00—Fishing for or freeing objects in boreholes or wells
    • E21B31/12—Grappling tools, e.g. tongs or grabs
    • E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot

Definitions

  • the present invention relates to a downhole tool string for performing an operation downhole.
  • Another challenge when operating downhole is the lack of visibility, and therefore detecting a leak or a lost object and the position thereof may be very difficult if not impossible.
  • Another challenge is to verify that an operation has been performed as intended and thus to prove that a specific operation is not the cause of another problem occurring.
  • a downhole tool string for performing an operation downhole the tool string having a tool axis, said downhole tool string comprising:
  • the arms may be more flexible than the shroud.
  • the arms may be made of metal.
  • shroud may be made of metal.
  • the arms may each have a curved part.
  • the grabbing tool part may have more than two arms.
  • the shroud may be movable in relation to the grabbing tool part, and/or the grabbing tool part may be movable in relation to the shroud.
  • the shroud may comprise an end part having an internal space configured to receive the grabbing tool part.
  • Said end part may comprise a camera configured to watch the operating tool.
  • the end part may comprise a plurality of cameras arranged between the arms.
  • the end part may comprise at least one source configured to illuminate visible light or infrared light in front of the operating tool and the camera.
  • the end part may have at least one opening configured to eject a transparent fluid in front of the camera.
  • the tool string may comprise a fluid chamber for the transparent fluid.
  • the camera may be connected with a monitor above surface, enabling an operator to follow the operation downhole in real-time.
  • the camera may be connected with a storage unit configured to store images provided by the camera.
  • the arms may circumvent the camera.
  • the actuating tool may be an axial stroking tool having a housing, a chamber, a first tool part comprising a pump unit providing pressurised fluid to the chamber, a shaft penetrating the chamber and a piston dividing the chamber into a first chamber section and a second chamber section.
  • the actuating tool may comprise a threaded spindle and a motor.
  • the downhole tool string according to the present invention may further comprise a driving tool for propelling the tool string forward in a well.
  • Said driving tool may be a downhole tractor.
  • the downhole tool string may be a wireline downhole tool string.
  • the downhole tool string may further comprise an anchoring tool section.
  • the present invention also relates to a downhole tool string for performing an operation downhole, the downhole tool string comprising:
  • the driving section may comprise a pump and a motor.
  • the driving section may be a driving tool with wheels for propelling the tool string forward in a well.
  • the driving tool may be a downhole tractor.
  • the camera section may comprise at least one source configured to illuminate an area in front of the camera.
  • the source may be a light source configured to radiate any kind of electromagnetic radiation, such visible light or infrared light.
  • the camera section may comprise a sensor unit configured to measure a condition of the well and, on the basis of the measurement, activate the camera.
  • the sensor unit may comprise a sensor configured to measure a temperature, a pressure and/or a flow content of a fluid.
  • the sensor unit may comprise an ultra-sonic sensor configured to measure a thickness of a metal casing arranged in the well.
  • Said sensor unit may comprise a first magnet for generating a magnetic field, a first sensor for measuring the magnitude and/or direction of the magnetic field, said first sensor being arranged in a first plane and at a first distance from the first magnet, for detecting changes in the magnetic field, and a second sensor for measuring the magnitude and/or direction of the magnetic field, said second sensor being arranged in the same first plane and at a second distance from the first sensor along the axis, also for detecting changes in the magnetic field and for locating casing collars and/or sliding sleeves in the metal casing.
  • the camera section may comprise a storage unit configured to store images provided by the camera and/or data from measurements provided by the sensor unit.
  • the camera may be arranged in a circumference of the camera section.
  • the camera section may comprise a transparent cover for protecting the camera.
  • the camera section may comprise a plurality of cameras.
  • the camera section may comprise at least one opening configured to eject a transparent fluid in front of the camera.
  • the tool string may comprise a fluid chamber for the transparent fluid.
  • the tool string may comprise a driving unit configured to rotate the camera in relation to the driving section.
  • the tool string may comprise a positioning unit connected with the camera section, so that a downhole position of an image provided by the camera is stored with said image.
  • the operating tool may be a grabbing tool part, a casing cutter, a sleeve operating tool, a logging tool, a drilling tool or a milling tool.
  • the downhole tool string may further comprise a second camera in front of the tool string.
  • Fig. 1 shows a downhole tool string 1 for fishing an object 3 in a well 2 downhole where the tool string has a tool axis 41 extending along the extension of the casing.
  • the downhole tool string 1 comprises an operating tool 5 configured to fish the object 3 and an actuating tool 10 configured to actuate the operating tool 5.
  • the operating tool comprises a shroud 4 having a shroud outer diameter OD S which is approximately the same as the outer diameter of the downhole tool string 1.
  • the operating tool 5 further comprises a grabbing tool part 7 comprising at least two arms 8.
  • the shroud 4 and the grabbing tool part 7 are movable in relation to each other along the tool axis 41 by means of the actuating tool 10.
  • the grabbing tool part 7 has a projected position and a retracted position in relation to the shroud.
  • the projected position is shown in Fig. 1 and the partly retracted position is shown in Fig. 2 .
  • the arms are in a relaxed condition and the grabbing tool part has a first outer diameter OD 1G which is larger than in the retracted position.
  • the arms are more flexible than the shroud and are able to flex radially inwards and are in their retracted position limited in flexing back into their relaxed position by means of the shroud.
  • Each arm has a curved part 42 and an inwardly projecting part 47.
  • a very simple fishing tool By having a shroud 4 and a grabbing tool part 7 movable in relation to each other and having arms of the grabbing tool part which are able to assume a retracted position, a very simple fishing tool is provided.
  • the arms having a relaxed extended position are arranged to enclose the identified object, and by a simple axial movement, the arms flex inwards to grab around the object and the shroud prevents the arms from assuming their relaxed position and thus provides the arms with a pre-tension, bringing them to squeeze around the object.
  • the size of the object is not often known.
  • the arms are thus retracted further into the shroud and the arms are then diminishing the outer diameter of the grabbing tool part and are able to provide a sufficient squeezing force around the object to be able to retrieve the object.
  • the shroud comprises an end part 9 comprising a camera 6 configured to watch the operating tool during the fishing operation and even identify the object 3 and the position thereof if required.
  • the camera 6 is arranged between the arms so that the arms do not significantly limit the camera's visual range towards the object.
  • the arms circumvent the camera and due to the curved shape of the arms, the camera has a full view of the operation and the object.
  • the end part 9 comprises at least one light source 22 configured to illuminate in front of the operating tool 5 and the camera 6.
  • the end part of Fig. 1 has an opening 45 for ejecting a transparent fluid in front of the camera and thus displacing the well fluid to create a better environment in front of the camera so that better images can be obtained.
  • the tool string comprises a fluid chamber 46 containing the transparent fluid.
  • the end part further comprises a plurality of cameras arranged between the arms.
  • the shroud comprises an end part 9 having an internal space 43 which is configured to receive the grabbing tool part 7.
  • the grabbing tool part 7 has more than two arms, e.g. three arms, to provide a better grip around the object to be fished in the well.
  • the grabbing tool part 7 is divided into three arms in that the arms are cut out of one rod and then bent into the shape shown. The grabbing tool part 7 is retracted into the shroud 4 by the actuating tool.
  • Fig. 1 the shroud is moved downwards pressing the arms inwards to have them squeeze around the object.
  • the movement is performed by the actuating tool 10 which moves the shroud away from the actuating tool 10.
  • the actuating tool may be an axial stroking tool having a housing, a chamber, a first tool part comprising a pump unit providing pressurised fluid to the chamber, a shaft penetrating the chamber and a piston dividing the chamber into a first chamber section and a second chamber section.
  • a first tool part comprising a pump unit providing pressurised fluid to the chamber, a shaft penetrating the chamber and a piston dividing the chamber into a first chamber section and a second chamber section.
  • the actuating tool may be a non-hydraulic tool comprising a threaded spindle and a motor providing a linear actuator retracting the arms into the shroud or projecting the shroud over the arms, limiting the free movement of the arms.
  • Each arm may be arranged in a space in between the cameras and the light sources.
  • the arms are made of metal, e.g. in a spring metal.
  • the shroud is also made of metal but may be made of other rigid materials suitable for use in a well.
  • Fig. 4 shows a downhole tool string 1 for performing an operation downhole, comprising a wireline 34, an operating tool 5 and a driving section 11 receiving power from the wireline for driving the operating tool 5.
  • the downhole tool string 1 further comprises a camera section 23 having a camera 6 facing radially from the tool string.
  • the camera section is arranged between the wireline and the operating tool, and the camera section has a first end part 35 and a second end part 36 and at least an electric conductor 37 and a hydraulic channel 38 extending from the first end part to the second end part for providing electricity and/or hydraulics to the operating tool.
  • the camera section By having a camera section with at least an electric conductor or a hydraulic channel extending from the first end part to the second end part, the camera section can be arranged at any position along the tool string wherever suited in relation to other tool sections and performance of the tool sections.
  • the operating tool 5 may be a cutter tool 31 driven by both hydraulic fluid for pressing the cutter arms 32 and thus the cutting edge 33 in engagement with the casing and by electricity for driving a motor 39 rotating the cutter tool 31.
  • the camera section After the cutting operation is completed, the camera section is run past the cut part of the casing, and the camera 6 is thus able to detect the cut and verify that the casing is in fact completely cut through. Sometimes even though the casing is cut perfectly, the upper part of the casing can, for other reasons, be difficult to pull out of the well, and then the cutting operator may be accused of not having performed the cutting operation in a satisfactory manner.
  • the camera section 23 has a plurality of light sources 22 arranged around the circumference of the camera section 23 and around the camera 6 to illuminate the object or the wall of the casing and thus determine if a leak 15 is present or determine the position and the size of an object.
  • the camera 6 is arranged in a groove 40 in the camera section 23 so that the camera does not extend from the camera section 23, thus preventing the camera from potential damage.
  • the camera section 23 may further comprise a transparent cover covering the camera 6 and thus protecting the camera and the light sources.
  • the tool string 1 further comprises a driving unit 21 for rotating the camera 6 in relation to the driving unit 21 so that only one camera is required for capturing images of the casing along also the entire circumference of the casing.
  • the camera section may further have an opening 45 configured to eject a transparent fluid in front of the camera.
  • the tool string may thus comprise a fluid chamber containing the transparent fluid.
  • the driving section may comprise a pump 17 driven by a motor 39 for providing fluid to an operating tool such as a sleeve operating tool for sliding a sleeve in order to open or close the sleeve.
  • an operating tool such as a sleeve operating tool for sliding a sleeve in order to open or close the sleeve.
  • the camera section comprises a sensor unit 51 configured to measure a condition of the well and, on the basis of the measurement, activate the camera when a condition of the well has changed.
  • the sensor unit 51 thus comprises a sensor 52 configured to measure a temperature, a pressure and/or a flow content of a fluid.
  • the sensor unit may also comprise an ultra-sonic sensor configured to measure a thickness of the metal casing arranged in the well in order to detect a leak 15, as shown in Fig. 4 .
  • the tool string comprises a positioning unit 53 connected with the camera section 23, so that a downhole position of an image provided by the camera is stored with said image.
  • the camera section may be connected as part of a tool string performing an operation downhole which does not need the camera for performing the operation, but due to the fact that the camera section follows the tool string all the way down the well, the camera section is able to obtain images along the way if the sensor unit detects an unexpected condition, such as dropping temperature.
  • the sensor unit comprises a first magnet for generating a magnetic field, a first sensor for measuring the magnitude and/or direction of the magnetic field, the first sensor being arranged in a first plane and at a first distance from the first magnet, for detecting changes in the magnetic field.
  • the sensor unit further comprises a second sensor for measuring the magnitude and/or direction of the magnetic field, the second sensor being arranged in the same first plane and at a second distance from the first sensor along the axis, also for detecting changes in the magnetic field, for locating casing collars and/or sliding sleeves in the metal casing.
  • the camera section may comprise a storage unit configured to store images provided by the camera and/or data from measurements provided by the sensor unit.
  • the tool string 1 may further comprise an anchoring tool section 24 having projectable anchors 27 for engaging the wall of the casing and thus maintaining the tool string in a predetermined position along the tool axis 41 while performing an operation.
  • the driving section 11 may be a driving tool for propelling the tool string forward in a well, such as a downhole tractor having wheels 12 on arms 14.
  • the downhole tool string is connected with a wireline and is thus a wireline downhole tool string.
  • the camera may be connected with a monitor above surface, enabling an operator to follow the operation downhole in real-time.
  • the camera may further be connected with a storage unit configured to store images provided by the camera.
  • the operating tool may be a grabbing tool part, a casing cutter, a sleeve operating tool, a logging tool, a drilling tool or a milling tool.
  • 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.
  • annular barrier an annular barrier comprising a tubular metal part mounted as part of the well tubular metal structure and an expandable metal sleeve surrounding and connected to the tubular part defining an annular barrier space.
  • 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 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)
  • Marine Sciences & Fisheries (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP17160609.8A 2017-03-13 2017-03-13 Bohrlochwerkzeugstrang Withdrawn EP3375973A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17160609.8A EP3375973A1 (de) 2017-03-13 2017-03-13 Bohrlochwerkzeugstrang

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17160609.8A EP3375973A1 (de) 2017-03-13 2017-03-13 Bohrlochwerkzeugstrang

Publications (1)

Publication Number Publication Date
EP3375973A1 true EP3375973A1 (de) 2018-09-19

Family

ID=58267030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17160609.8A Withdrawn EP3375973A1 (de) 2017-03-13 2017-03-13 Bohrlochwerkzeugstrang

Country Status (1)

Country Link
EP (1) EP3375973A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO20180558A1 (en) * 2018-04-23 2019-10-24 Wellgrab As Downhole fishing tool
CN111561285A (zh) * 2020-06-30 2020-08-21 南智（重庆）能源技术有限公司 油气井智能复合打捞方法
CN112049594A (zh) * 2020-09-03 2020-12-08 吉林师范大学 一种泥浆内环境探测与打捞平台
CN115142806A (zh) * 2022-06-15 2022-10-04 淮安市井神钻采机具有限公司 一种电力驱动的落鱼打捞装置
US11555369B2 (en) * 2021-02-25 2023-01-17 Saudi Arabian Oil Company Fishing scanning tool
WO2023021294A1 (en) * 2021-08-19 2023-02-23 E.V. Offshore Limited Downhole camera enhanced manipulation tool

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1456943A (en) * 1922-06-02 1923-05-29 Robert E Smith Grappling tool
US1553991A (en) * 1923-02-20 1925-09-15 William E Davison Fishing tool
US2236761A (en) * 1938-09-27 1941-04-01 Joe E Nichols Well fishing tool
US4061389A (en) * 1975-07-09 1977-12-06 Keller V J Combination wire line releasable overshot and pull tool
GB2353055A (en) * 1996-07-17 2001-02-14 Baker Hughes Inc A downhole service tool
US20120048552A1 (en) * 2010-08-30 2012-03-01 Macdougall Tom Method of using wired drillpipe for oilfield fishing operations

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1456943A (en) * 1922-06-02 1923-05-29 Robert E Smith Grappling tool
US1553991A (en) * 1923-02-20 1925-09-15 William E Davison Fishing tool
US2236761A (en) * 1938-09-27 1941-04-01 Joe E Nichols Well fishing tool
US4061389A (en) * 1975-07-09 1977-12-06 Keller V J Combination wire line releasable overshot and pull tool
GB2353055A (en) * 1996-07-17 2001-02-14 Baker Hughes Inc A downhole service tool
US20120048552A1 (en) * 2010-08-30 2012-03-01 Macdougall Tom Method of using wired drillpipe for oilfield fishing operations

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO20180558A1 (en) * 2018-04-23 2019-10-24 Wellgrab As Downhole fishing tool
NO345146B1 (en) * 2018-04-23 2020-10-19 Wellgrab As Downhole fishing tool
US11982133B2 (en) 2018-04-23 2024-05-14 Autentik As Force transferring wellbore connector
CN111561285A (zh) * 2020-06-30 2020-08-21 南智（重庆）能源技术有限公司 油气井智能复合打捞方法
CN111561285B (zh) * 2020-06-30 2024-01-23 南智（重庆）能源技术有限公司 油气井智能复合打捞方法
CN112049594A (zh) * 2020-09-03 2020-12-08 吉林师范大学 一种泥浆内环境探测与打捞平台
CN112049594B (zh) * 2020-09-03 2022-08-12 吉林师范大学 一种泥浆内环境探测与打捞平台
US11555369B2 (en) * 2021-02-25 2023-01-17 Saudi Arabian Oil Company Fishing scanning tool
WO2023021294A1 (en) * 2021-08-19 2023-02-23 E.V. Offshore Limited Downhole camera enhanced manipulation tool
CN115142806A (zh) * 2022-06-15 2022-10-04 淮安市井神钻采机具有限公司 一种电力驱动的落鱼打捞装置

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