Downhole cable tool

Abstract

The present invention relates to a downhole cable tool for performing operations in a metal well tubular structure downhole of a well containing wellbore fluid, the downhole cable tool having an axial extension direction and a front face facing away from the top of the well, and the downhole cable tool comprising: a cable connection unit for connecting to a cable; an electric motor powered by the cable for rotating the rotating shaft at a first rotational speed; an operating tool component for performing an operation by electric and / or hydraulic fluid; and an epicyclic gear arranged between the electric motor and the operating tool component, the epicyclic gear being driven by a rotational shaft of the electric motor for rotating the operating tool component at a second rotational speed through the output rotational shaft, the epicyclic gear having a channel through which an electrical and / or fluid line extends, to provide electrical and / or hydrodynamic forces for operating the operating tool component. The invention also relates to a downhole system comprising a downhole cable tool and a drive unit, such as a downhole tractor, for advancing the downhole system in a well.

Description

Technical Field

[0001] This invention relates to a downhole cable tool for performing operations within a metal well casing structure downhole, the downhole cable tool having an axial extension direction and a front end face facing away from the well top. The invention also relates to a downhole system comprising the downhole cable tool and a drive unit, such as a downhole tractor, for propelling the downhole system forward within the well. Background Technology

[0002] In downhole cable tools, power and space are limited, thus limiting tool functionality and necessitating efficient design and intelligent methods to avoid any waste of power. However, the limited space downhole forces tool designs to utilize a single electric motor for multiple purposes, requiring gears to increase or decrease the output shaft speed of the motor if different speeds are needed for each purpose. Furthermore, if pumping is required, only one pump is used for all purposes, with hydraulic control and distribution sections supplying pressurized fluid in the desired state for all. The use of gears and hydraulic sections reduces overall efficiency and limits the cable tool's capabilities. Moreover, the more complex the tool, the more frequently it wears out. Therefore, tool designers need to find more efficient components to redesign tools and / or accumulate power so that new cable tools can perform new and more demanding operations. Summary of the Invention

[0003] One object of the present invention is to overcome, in whole or in part, the aforementioned disadvantages and deficiencies of the prior art. More particularly, an object is to provide an improved downhole cable tool that enables the necessary intervention operations in the well without limiting tool efficiency, reducing tool wear resistance, or significantly increasing the radial and axial dimensions of the tool.

[0004] The foregoing objectives, as well as numerous other objectives, advantages, and features, which will become apparent from the following description, are achieved by means of a downhole cable tool for performing operations in a metal well casing structure downhole in a well containing wellbore fluid, the downhole cable tool having an axially extending direction and a front end face away from the top of the well, and the downhole cable tool comprising:

[0005] - A cable connection unit for connecting to a cable;

[0006] - An electric motor powered by a cable is used to rotate the rotating shaft at a first speed;

[0007] - An operating tool component for performing the operation via electricity and / or hydraulic fluid; and

[0008] A rotary gear arranged between the electric motor and the operating tool component, driven by the rotating shaft of the electric motor, is used to rotate the operating tool component at a second rotational speed via the output rotating shaft.

[0009] The rotary gear has a channel through which electrical and / or fluid lines extend to provide electrical and / or fluid power for operating the tool components.

[0010] In addition, the rotating gear can be a nutating rotating gear, such as a oscillating gear or a nutating bevel gear.

[0011] In addition, rotating gears may have a central axis.

[0012] Furthermore, the central axis may coincide with the central rotation axis of the electric motor.

[0013] In addition, the downhole cable tool may have a tool center axis.

[0014] Furthermore, the central axis may coincide with the central axis of the tool.

[0015] Furthermore, the channel may have a channel center axis that coincides with the center axis of the rotating gear.

[0016] In this way, electrical and / or fluid lines are not distorted and electrical and / or fluid power can be provided without any inefficient connections.

[0017] Furthermore, the channel can be provided by an output rotating shaft and a through hole in the rotating shaft.

[0018] Furthermore, the channel can extend along the axial extension direction.

[0019] In addition, the rotary gear can be a reduction gear used to reduce the rotational speed of the rotating shaft.

[0020] In addition, the reduction gear can be a oscillating gear or a nutating bevel gear, used to reduce the rotational speed of the rotating shaft at a reduction ratio of at least 1:10, preferably at least 1:50, more preferably at least 1:100, even more preferably at least 1:200, even more preferably at least 1:1000.

[0021] In addition, the rotary gear may include a reaction control member driven by a rotary shaft, a rotary motion converter driven by the reaction control member, and an output gear driven by the rotary motion converter for driving an output rotary shaft connected to the operating tool component.

[0022] Furthermore, the reaction control component can be stationary and fixed to the tool housing.

[0023] In addition, the operating tool components may include a drill bit or a machining head.

[0024] In addition, the processing head may include a plurality of blades / insertions extending from the front end face along the axial extension direction.

[0025] Furthermore, the plurality of inserts may be distributed along the outer periphery.

[0026] In addition, the insert may be an abrasive insert.

[0027] In addition, the insert may comprise particles and a binder.

[0028] In addition, the particles can be made of tungsten carbide, diamond, etc.

[0029] In addition, the operating tool components may include a vibration generating unit for providing vibrational force to the first drill bit.

[0030] In addition, downhole cable tools may also include a drive unit for driving the vibration generating unit, which is powered by the line extending through the channel.

[0031] In addition, the drive unit may include an electric motor.

[0032] In addition, downhole cable tools may also include a pump unit driven by an electric motor at a first rotational speed for providing hydrodynamic power in the form of pressurized fluid to the operating tool components via the line extending through the channel.

[0033] In addition, the pump unit can pump fluid inside the tool to provide pressurized fluid within the passage and a portion of the tool string, thereby compensating for and providing overpressure in the tool string so that wellbore fluid cannot enter unintended parts of the tool string.

[0034] In addition, downhole cable tools may have fluid lines and electrical lines that extend along the channel and inside the channel.

[0035] In addition, the power lines can also power the sensors in the operating tool components.

[0036] In addition, the machining head or drilling head can be hollow.

[0037] In addition, downhole cable tools may also include drill bits, such as guide drill bits or similar drill bits, which are partially arranged within the machining head or drill bit and are capable of passing through the component via a borehole.

[0038] In addition, the drill bit or guide bit can be connected to a rotating shaft that extends through the channel.

[0039] In addition, the operating tool component may include at least one cutting arm having at least one cutting element, the at least one cutting arm being extendable under the action of pressurized fluid for moving the cutting arm between a retracted position and an extended position, and the operating tool component being driven to rotate by an output rotary shaft for cutting within a metal well casing structure.

[0040] In addition, the pump unit may include at least one pump inlet in fluid communication with the wellbore fluid for drawing wellbore fluid from the well and re-ejecting fluid near the operating tool components.

[0041] In addition, the reduction gear may include bearings arranged between the rotating shaft and the reaction control member, the rotary motion converter and the output gear.

[0042] In addition, the teeth of the reaction control component can mesh with the first set of teeth of the rotary motion converter, the second set of teeth of the rotary motion converter can mesh with the teeth of the output gear, and the output gear is connected to the output rotating shaft.

[0043] In addition, downhole cable tools may also include an electrical control unit, with the cable connection unit connected to the electrical control unit.

[0044] In addition, downhole cable tools may also include drive units, such as downhole tractors, for propulsing the tool forward in the well.

[0045] In addition, downhole cable tools may include anchoring sections for anchoring the tool in the well, thereby preventing the first tool portion, including the cable connection unit, from moving along its axial extension direction.

[0046] In addition, the tool may include a second tool portion that rotates relative to the first tool portion.

[0047] Finally, the present invention also relates to a downhole system comprising downhole cable tools and drive units, such as downhole traction devices, for propelling the downhole system forward in a well. Attached Figure Description

[0048] The invention and its many advantages will now be described in more detail with reference to the accompanying schematic diagrams, which are for illustrative purposes only and show some non-limiting embodiments, wherein:

[0049] Figure 1 A partial cross-sectional view of the downhole cable tool is shown;

[0050] Figure 2 A partial cross-sectional view of another downhole cable tool is shown;

[0051] Figure 3 A partial cross-sectional view of yet another downhole cable tool is shown;

[0052] Figure 4A partial cross-sectional view of the rotating gear of a downhole tool is shown;

[0053] Figure 5 A cross-sectional view of another rotating gear of another downhole tool is shown;

[0054] Figure 6 A cross-sectional view of another rotating gear of another downhole tool is shown; and

[0055] Figure 7 A cross-sectional view of another rotating gear of another downhole tool is shown.

[0056] All the accompanying drawings are highly schematic and not necessarily drawn to scale, and they only show those parts necessary to illustrate the invention, while other parts are omitted or only implied. Detailed Implementation

[0057] Figure 1 A downhole cable tool 1 is shown for performing operations in a well containing wellbore fluid within a metal well casing structure 18. The downhole cable tool 1 has an axial extension direction 2 and a front end face 3 facing away from the top 25 of the well. The downhole cable tool 1 includes a cable connection unit 4 for connection to a cable 5, an electric motor 6 powered by the cable 5 to rotate a rotating shaft 7 at a first rotational speed, and an operating tool component 10 for performing operations via electricity and / or hydraulic fluid and / or liquid. The downhole cable tool 1 also includes a nutating gear 8 arranged between the electric motor and the operating tool component, wherein the nutating gear 8 is driven by the rotating shaft 7 of the electric motor 6 for rotating the operating tool component 10 at a second rotational speed via an output rotating shaft 7'. The nutating gear 8 is a nutating gear having a channel 9 through which electrical and / or fluid lines 11, 11a, 11b extend to provide electrical and / or fluid power for operating the operating tool component 10.

[0058] Electric motors have various applications in downhole cable tools. To maintain the highest possible power efficiency, electric motors are carefully selected to meet the required demands, taking into account the limited power available for operation within the cable. When rotational power is required to further descend the tool at a speed different from that of the electric motor's shaft, gears are necessary. However, the electrical and hydraulic power transmitted to the tool's operating components becomes very limited (if possible) to avoid reducing the efficiency of the selected gears. By using planetary gears such as oscillating gears or nutating bevel gears, the gear center can be designed with channels to provide pathways for electrical and / or fluid lines, supplying electrical and / or fluid power to the tool's operating components without significantly reducing gear efficiency.

[0059] The central axis of the rotating gear 8 coincides with the central rotation axis of the electric motor 6 and the tool central axis of the downhole cable tool. The channel 9 has a channel central axis that coincides with the central axis of the rotating gear 8. In this way, the electrical and / or fluid lines 11, 11a, 11b can extend through the gear 8 without twisting, thus allowing the provision of electrical and / or fluid power without any inefficient connections, while maintaining highly efficient transmission from the motor 6 to the operating tool component 10. In prior art tools, fluid or electrical channels impair gear size because the channels are arranged within the tool housing, limiting gear space; therefore, gear efficiency is low if fluid and / or electrical power must pass through the gear section.

[0060] Channel 9 extends along the axial extension direction 2 and is provided by the output rotating shaft 7' and the through hole in the rotating shaft 7, and passes through the oscillating gear or nutating bevel gear 8, and the rotation axes of the electric motor 6, rotating shafts 7, 7' and the oscillating gear or nutating bevel gear 8 are therefore coincident with the central axis of the channel. The oscillating gear or nutating bevel gear 8 can be manufactured such that the gear can extend around the channel 9 and provide sufficient space in the channel for fluid lines to pass through the channel.

[0061] exist Figure 1 In the drilling tool assembly 10, the tooling component 10 includes machining heads 16, 16a, which can be rotated via an output rotary shaft 7'. The tooling component 10 includes a vibration generating unit 12 for providing vibrational force on the drill bit to enhance the machining operation of the tooling component 10, wherein the vibration generating unit 12 is configured to convert rotational force into vibrational force. The downhole cable tool 1 also includes a drive unit 17, such as an electric motor, configured to provide rotational force to the vibration generating unit 12 for driving the vibration generating unit 12. The drive unit 17 is powered by lines 11, 11a, 11b extending through the channel 9. The drive unit 17 includes an electric motor 6, and the power lines 11, 11b power the electric motor 6 of the drive unit 17. Fluid lines 11, 11a and power lines 11, 11b all extend along and within the channel 9. The power lines 11, 11b can also power sensors in the tooling component 10.

[0062] In particular, when powering auxiliary equipment such as the drive unit 17 for driving the vibration generating unit 12, or demanding logging units, it has proven to be very difficult in known tools that still require gear transmission. This power is possible by using oscillating gears or nutating bevel gears without limiting their size and efficiency.

[0063] The vibration generating unit 12 is connected to the drill bits 16, 16a via the output rotation shaft 7' of the rotary drill bits 16, 16a. The vibration generating unit 12 provides oscillating vibration force in a direction parallel, coaxial, and / or coincident with the axial extension direction 2 of the downhole cable tool 1.

[0064] By employing oscillating vibrations in a direction parallel, coaxial, and / or coincident with the longitudinal tool axis, drill bits 16, 16a are able to process harder materials at greater depths downhole compared to the absence of such vibrations. The vibration generating unit 12 provides oscillating vibrations at a frequency greater than 50 Hz, more preferably greater than 100 Hz, and even more preferably greater than 200 Hz. Furthermore, the vibration generating unit 12 can provide oscillating vibrations at a frequency less than 800 Hz, more preferably less than 600 Hz, and even more preferably less than 450 Hz.

[0065] exist Figure 2 In this embodiment, the operating tool component 10 includes machining heads 16 and 16b, each including an insert 19 extending from a front end face 3 along an axial extension direction 2. The insert 19 is distributed along the circumference / outer periphery / periphery of the machining heads 16 and 16b. The insert is an abrasive insert containing particles and a binder. The particles are made of tungsten carbide, diamond, or the like.

[0066] The downhole cable tool 1 also includes a pump unit 14 driven by an electric motor 6 at a first rotational speed for providing pressurized fluid power to the operating tool assembly 10 via fluid lines 11, 11a extending through the channel 9. The pressurized fluid can be ejected as a jet through at least one orifice of the machining head. Figure 2 As shown, pump unit 14 includes a pump inlet 15 in fluid communication with the wellbore fluid for drawing in wellbore fluid and re-ejecting fluid near the operating tool assembly 10. The wellbore fluid is discharged through or near the machining heads 16, 16b.

[0067] In another embodiment, not shown, pump unit 14 includes a pump outlet for discharging fluid into the well. The pump outlet is disposed in the circumferential wall of the pump, wellbore fluid is drawn in through operating tool component 10, and pump inlet 15 is in fluid communication with wellbore fluid flowing in through openings in drill bit or machining head 16, 16a, 16b.

[0068] The machining head 16 may also be hollow, in which a drill bit, such as a guide drill bit or similar drill bit, is disposed and is capable of passing through the part by drilling. The drill bit or guide drill bit may be connected to a rotary drive shaft extending through the channel 9.

[0069] exist Figure 1In this process, pump unit 14 pumps fluid inside tool 1 to provide pressurized fluid inside passage 9 and a portion of tool 1, thereby compensating for and providing overpressure inside the tool so that wellbore fluid cannot enter unintended parts of tool 1.

[0070] exist Figure 3 In this configuration, the operating tool assembly 10 includes three cutting arms 23, each having at least one cutting element 24. Each cutting arm 23 can be extended by pressurized fluid for moving between a retracted position and an extended position, and the operating tool assembly 10 is rotated via an output rotary shaft 7' for cutting within a metal well casing structure.

[0071] exist Figure 1 In this context, the rotary gear 8 is a reduction gear used to reduce the rotational speed of the rotating shaft 7 by a reduction ratio of at least 1:10, preferably at least 1:50, more preferably at least 1:100, even more preferably at least 1:200, and even more preferably at least 1:1000.

[0072] To reduce the rotational speed of the output rotating shaft 7', the downhole cable tool 1 may also include a reduction gear 43, for example... Figure 4The rotary gear 8 shown is a oscillating gear or a nutating bevel gear used to reduce the rotational speed of the rotating shaft 7. The rotary gear 8 includes a reaction control member 44 stationary and fixedly connected to the tool housing, a rotary motion converter 45 driven by the rotating shaft and interacting with the reaction control member 44, and an output gear 46 driven by the rotary motion converter 45 to drive the output rotating shaft 7' connected to the operating tool component 9. The rotary motion converter 45 is an oscillating element. The nutating oscillating motion will cause a wavy torque about axis 50, which alternates between clockwise direction 51 and counterclockwise direction 52. The rotational speed of the rotating shaft 7 (input) is thus reduced at the output rotating shaft 7'. The rotating shaft 7, the output rotating shaft 7', and the central portion of the rotary gear 8 are hollow, so electrical or hydraulic lines can pass through them. The teeth 48 and 48a of the reaction control member 44 engage with the first set of teeth 48 and 48b of the rotary motion converter 45, and the second set of teeth 48 and 48c of the rotary motion converter 45 engage with the teeth 48 and 48d of the output gear 46, which is connected to the output rotating shaft 7'. The reaction control member 44 has teeth 48a with a number of teeth Z1, which meshes with teeth 48b with a number of teeth Z2 on one side of the rotary motion converter 45, and teeth 48c with a number of teeth Z3 mesh with teeth 48d with a number of teeth Z4 on the other side of the rotary motion converter 45, so as to reduce the rotational speed of the rotating shaft 7. The number of teeth Z1 is one less than the number of teeth Z2, and the number of teeth Z3 is one less than the number of teeth Z4. The number of teeth Z1 / Z2 can be 40 / 41, and the number of teeth Z3 / Z4 can be 61 / 60, which corresponds to a reduction ratio of 1:123. The number of teeth Z1 / Z2 can also be 20 / 21, and the number of teeth Z3 / Z4 can be 32 / 31, which corresponds to a reduction ratio of 1:59. Therefore, the reduction ratio can be as high as 1:1000. Therefore, the reduction gear 43 is a double-sided or double-sided nutating bevel gear or a oscillating gear.

[0073] By using rotary gears such as oscillating gears or nutating bevel gears to reduce the rotational speed of the rotating shaft, reduction gear 43 achieves higher efficiency than conventional planetary reduction gears. Oscillating gears or nutating bevel gears are also more robust, easier to install, and require less space. In downhole cable tools, the tool is internally pressure-compensated, so the fluid around the tool components resists any movement. This means that by using oscillating gears or nutating bevel gears, efficiency is higher because the teeth do not intentionally act as "water pumps." By using rotary gears such as oscillating gears or nutating bevel gears, more teeth mesh with each other simultaneously, resulting in greater gear strength and the ability to transmit greater forces, and each tooth can be made more robust.

[0074] like Figure 5As shown, the rotary gear 8 includes multiple bearings 47 disposed between the rotary shaft 7 and the reaction control member 44, between the rotary shaft 7 and the rotary motion converter 45, and between the rotary shaft 7 and the output gear 46. The bearings inside the rotary motion converter 45, and the bearings between the rotary shaft 7 and the rotary motion converter 45, all rotate about an axis inclined relative to the axial extension direction of the tool. Thus, the rotary shaft 7 is centrally fixedly connected to the bearings 47 inside the rotary motion converter 45. The rotary shaft 7 is also centrally fixedly connected to the bearings 47 arranged inside the output gear 46.

[0075] exist Figure 5 In this configuration, the reduction gear 43 is also a oscillating gear or a nutating bevel gear, and the diameter of the output gear 46 is larger than the diameter of the reaction control member 44. The oscillating rotary motion converter 45 has a diameter on one side that matches the diameter of the output gear 46, and a diameter on the other side that matches the diameter of the reaction control member 44. By having different diameters, the reduction gear 43 can be made to have a larger diameter than the output gear 46. Figure 4 The overall outer diameter is smaller. It can be seen that the rotating shaft 7 and the output rotating shaft 7' have hollow channels for power lines and / or hydraulic lines.

[0076] Figure 6 The reduction gear 43 is shown; this reduction gear is a balanced rotary transmission gear because... Figure 4 The reduction gear 43 is supplemented with a similarly constructed balancing component 49 to counteract the effect of… Figure 4 Any vibration caused by the reduction gear 43. Therefore, the oscillating rotary motion converter 45 on both sides of the balancing component 49 or as Figure 6 The bottoms of them show relative movement, or as shown in the image. Figure 6 The tops of the objects move toward each other to counteract the movement. Figure 6 The function of the reduction gear 43 shown is the same as Figure 4 The reduction gear 43 shown is identical. The rotating shafts 7 and 7' are hollow and have the same number of teeth.

[0077] like Figure 4-6 As shown, Figure 7 The reduction gear 43 shown also includes a oscillating rotary motion converter 45, but a set of teeth 48b that engages with teeth 48a of the reaction control member 44 is positioned on the same side as teeth 48d of the output gear 46 of the oscillating rotary motion converter 45 that engages with teeth 48c. Figure 7 The reduction gear 43 has a ratio Figure 4-6 The gear in the middle has a larger outer diameter, but for the same strength and number of teeth, the extension in the axial direction 2 is shorter. The rotating shafts 7 and 7' are hollow and are used for electrical and / or hydraulic feedthrough.

[0078] exist Figure 1The diagram shows a downhole system 100, which includes a downhole cable tool 1 and a drive unit 32, such as a downhole traction device, for propelling the downhole system 100 forward in the well. The downhole cable tool 1 also includes an electrical control unit 31 for driving a pump and motor section 34 to drive the drive unit 32, and a cable connection unit 4 is connected to the electrical control unit 31. The downhole cable tool 1 also includes an anchoring section 33 driven by the pump and motor section 34 for anchoring the tool in a position in the well, thereby preventing movement of the first tool portion 21, including the cable connection unit 4, along its axial extension direction 2. The downhole cable tool 1 includes a second tool portion 22 that rotates relative to the first tool portion 21, and the second tool portion 22 includes processing heads 16, 16b.

[0079] Vibration generating unit 12 includes a wave-bearing oscillator or a magnetostrictive oscillator to provide vibrational force. Alternatively, vibration generating unit 12 may include a rotatable cam mechanism having a first cam profile that rotates relative to a mating second cam profile. Vibration generating unit 12 may include a vibration transmission unit 30 comprising a spring system configured to transmit and amplify the vibrations generated by vibration generating unit 12. The spring system may be formed as a single unit and shaped like stacked Belleville washers. The spring system may also include two or more truncated conical springs arranged in series and / or two or more Belleville springs arranged in series.

[0080] The downhole cable tool 1 may also include a stroke tool, which is a tool that provides axial force on the operating tool assembly 10. The stroke tool includes an electric motor for driving a pump. The pump pumps fluid into a piston housing to move a piston acting within the housing. The piston is mounted on a stroke shaft. The pump can pump fluid out of the piston housing on one side while simultaneously drawing fluid in on the other side of the piston.

[0081] Fluids or wellbore fluids refer to any type of fluid present downhole in oil or gas wells, such as natural gas, petroleum, oil-based mud, crude oil, and water. Gas refers to any type of gaseous component present in a well, completion well, or open well, and oil refers to any type of oil component, such as crude oil or oil-bearing fluids. Therefore, gas, oil, and water fluids may each include other elements or substances besides gas, oil, and / or water.

[0082] Casing or metal well casing structures refer to any type of pipe, conduit, pipe structure, liner, tubing string, etc. used downhole in connection with oil or gas production.

[0083] When the tool is not fully submerged in the casing, a downhole tractor can be used to push the tool to a position fully submerged in the well. The downhole tractor may have a wheeled, extendable arm, with the wheels contacting the inner surface of the casing for propulsion of the tractor and the tool within the casing. A downhole tractor is any type of drive tool capable of pushing or pulling tools downhole, such as Well Tractor®.

[0084] Although the invention has been described above in conjunction with preferred embodiments thereof, several variations will be apparent to those skilled in the art without departing from the invention as defined in the following claims.

Claims

1. A downhole cable tool (1) for performing operations in a metal well casing structure in a well containing wellbore fluid, the downhole cable tool having an axially extending direction (2) and a front end face (3) facing away from the top of the well, and the downhole cable tool comprising: - Cable connection unit (4) for connecting to cable (5); - An electric motor (6) powered by a cable is used to rotate the rotating shaft (7) at a first speed; - Operating tool component (10) for performing the operation by means of electricity and / or hydraulic fluid; as well as - A rotary gear (8) arranged between the electric motor and the operating tool component, the rotary gear being driven by the rotating shaft of the electric motor, for rotating the operating tool component at a second rotational speed via an output rotating shaft (7'). The rotary gear has a channel (9) through which an electrical and / or fluid line (11) extends to provide electrical and / or fluid power for operating the operating tool components.

2. The downhole cable tool according to claim 1, wherein, The rotating gear is a nutating rotating gear, such as a oscillating gear or a nutating bevel gear.

3. The downhole cable tool according to claim 1 or 2, wherein, The channel is provided by the output rotating shaft and the through hole in the rotating shaft.

4. The downhole cable tool according to any one of the preceding claims, wherein, The rotary gear is a reduction gear used to reduce the rotational speed of the rotating shaft.

5. The downhole cable tool according to any one of the preceding claims, wherein, The rotary gear includes a reaction control member (44) driven by the rotary shaft, a rotary motion converter (45) driven by the reaction control member, and an output gear (46) driven by the rotary motion converter for driving an output rotary shaft (7') connected to the operating tool component.

6. The downhole cable tool according to any one of the preceding claims, wherein, The operating tool components include a drill bit (16, 16a) or a machining head (16, 16b).

7. The downhole cable tool according to claim 6, wherein, The operating tool component includes a vibration generating unit (12) for providing vibrational force to the first drill bit.

8. The downhole cable tool according to any one of the preceding claims further includes a drive unit (17) for driving the vibration generating unit, the drive unit being powered by the line extending through the channel.

9. The downhole cable tool according to any one of the preceding claims further includes a pump unit (14) driven by the electric motor at a first rotational speed for providing fluid power in the form of pressurized fluid to the operating tool components via the line extending through the channel.

10. The downhole cable tool according to claims 8 and 9, wherein, The pump unit pumps fluid inside the tool to provide pressurized fluid within the passage and a portion of the tool string, thereby compensating for pressure in the tool string and providing overpressure in the tool string so that wellbore fluid cannot enter unintended portions of the tool string.

11. The downhole cable tool according to any one of the preceding claims, wherein, Both the fluid lines (11, 11a) and the electrical lines (11, 11b) extend along and within the channel.

12. The downhole cable tool according to claim 9, wherein, The operating tool component includes at least one cutting arm (23) having at least one cutting element (24), the at least one cutting arm being able to extend by means of pressurized fluid for moving the cutting arm between a retracted position and an extended position, and the operating tool component being driven to rotate by the output rotating shaft for cutting in the metal well casing structure.

13. The downhole cable tool according to claim 9, wherein, The pump unit includes at least one pump inlet (15) which is in fluid communication with the wellbore fluid for drawing wellbore fluid from the well and re-ejecting fluid near the operating tool component.

14. The downhole cable tool according to any one of the preceding claims, wherein, The planetary gear includes bearings (47) arranged between the rotating shaft and the reaction control member, between the rotating shaft and the planetary motion converter, and between the rotating shaft and the output gear.

15. A downhole system (100) comprising a downhole cable tool according to any one of claims 1-14 and a drive unit for propelling the downhole system forward in a well, the drive unit being, for example, a downhole traction device.

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