Underground positioning device for petroleum drilling and production

Abstract

The utility model belongs to the technical field of underground positioning for petroleum drilling and production, and particularly relates to an underground positioning device for petroleum drilling and production, which comprises a range finder, a top plate, four supporting legs fixedly mounted at the bottom of the top plate, universal wheels fixedly mounted at the bottoms of the supporting legs, a through groove formed in the top plate, a moving plate slidably mounted in the through groove, and a positioning rod mounted on the moving plate, a groove is formed in the movable plate, two take-up rollers are rotationally installed in the groove, steel wire ropes are wound around the take-up rollers, a fixed plate is fixedly installed at the bottom of the movable plate, two guide pipes are fixedly installed at the bottom of the fixed plate, and one ends of the two steel wire ropes penetrate through the two guide pipes correspondingly and are fixedly provided with the same connecting plate. When the whole device is used, it is ensured that the whole device can be pushed to move, workers do not need to carry the whole device to move, time and labor are saved, the distance measuring instrument can be moved to the position over drilling wells with different diameters, and operation is more convenient and faster.

Description

Technical Field

[0001] This utility model belongs to the field of downhole positioning technology for oil drilling, and particularly relates to a downhole positioning device for oil drilling. Background Technology

[0002] Oil drilling and extraction is a complex and systematic project that encompasses a range of technologies and processes from oil exploration to extraction. After the location of the oil is found, drilling is required.

[0003] For example, Chinese patent CN217813366U discloses a downhole positioning device for oil drilling, which includes: an oil well, the oil well comprising a positioning device body and a horizontal plate; several positioning blocks are symmetrically fixedly connected to the side walls of the positioning device body; a first rotating rod is provided in the middle of the positioning block; a diagonal rod is sleeved on the outside of the first rotating rod; a second rotating rod is provided in the middle of one end of the diagonal rod; a second roller is sleeved on the outside of the second rotating rod; several springs are fixedly connected to the side walls of the positioning device body, and one end of each spring is fixedly connected to the side wall of the diagonal rod. Through this structure, the springs push the diagonal rod to move outside the first rotating rod, causing the second roller to engage with the inner wall of the oil well, thereby keeping the positioning device body stable when in motion.

[0004] The aforementioned patent has the following problems:

[0005] This patented device has several drawbacks in its use. For example, after positioning a well in one location, workers need to move the entire device to another well for positioning, which is time-consuming and labor-intensive. Furthermore, the positioning device and support frame are separate, requiring multiple workers or a transport vehicle to move it to the next well location, which is inconvenient. Additionally, the support frame has a fixed size, while well dimensions vary. If the diameter of the well top is larger than the length of the support frame, it cannot be placed directly above the well. Therefore, we propose a downhole positioning device for oil drilling. Utility Model Content

[0006] The purpose of this invention is to provide a downhole positioning device for oil drilling to solve the problems mentioned in the background art.

[0007] In view of this, the present invention provides a downhole positioning device for oil drilling, including a rangefinder, and further comprising:

[0008] The top plate has four support legs fixedly installed at its bottom, and casters fixedly installed at the bottom of each support leg. A through groove is formed in the top plate, and a movable plate is slidably installed in the through groove. A groove is formed in the movable plate, and two take-up rollers are rotatably installed in the groove. Steel wire ropes are wound on the take-up rollers. A fixed plate is fixedly installed at the bottom of the movable plate, and two guide tubes are fixedly installed at the bottom of the fixed plate. One end of each of the two steel wire ropes passes through the two guide tubes and is fixedly installed on the same connecting plate. The rangefinder is fixedly installed at the bottom of the connecting plate.

[0009] A drive assembly, located within the top plate, is used to drive the movable plate to displacement.

[0010] A power assembly, located within a movable plate, is used to drive the two take-up rollers to rotate.

[0011] In this technical solution, during use, the operator can push the entire device to the oil well location using the four casters and the handle on the top plate. The operator can then power on and start the two electric push rods. The output shaft of the electric push rods will drive the fixing pins downward, causing them to insert into the soil, thus initially fixing the position of the top plate. Subsequently, the drive component will drive the moving plate to move. When the rangefinder is directly above the oil well, the power component will drive the two take-up rollers to rotate. The connecting plate will move downward, causing the wire rope wound on the take-up rollers to slowly unwind. At this time, the wire rope will slide inside the guide tube at one end. Under the action of the guide tube, the wire rope will not sway, thus ensuring the stability of the downward movement of the connecting plate. Subsequently, the rangefinder will perform distance measurement and positioning.

[0012] In the above technical solution, the driving component further includes:

[0013] A threaded rod is rotatably installed in a through groove, one end of which extends into a movable plate. Limiting grooves are provided on both sides of the through groove in the top plate. A round rod is fixedly installed in the limiting groove, and a limiting block is slidably installed in the limiting groove and on the round rod. The limiting block is fixed to the movable plate.

[0014] The second motor is fixedly mounted on the top plate, and its output end extends through one side of the top plate into the through slot and is coaxially connected to the threaded rod.

[0015] In this technical solution, the second motor is powered on and started. The output shaft of the second motor will drive the threaded rod to rotate. Under the action of the thread, the threaded rod will drive the moving plate to move. The moving plate will drive the two limit blocks to slide on the corresponding connecting plate, making the displacement of the moving plate more stable.

[0016] In the above technical solution, the output shaft of the second motor is rotatably connected to the top plate, the moving plate is threadedly connected to the threaded rod, and the limiting block is slidably connected to the round rod.

[0017] In this technical solution, the output shaft of the second motor is ensured to rotate normally within the top plate. Under the action of the thread, the rotation of the threaded rod is ensured to drive the moving plate to displacement, and the limit block is ensured to slide on the round rod.

[0018] In the above technical solution, the power component further includes:

[0019] Two power chambers are provided, each located within a movable plate and on one side of a groove. A first bevel gear is rotatably mounted within each power chamber, and a second bevel gear is rotatably mounted within the same power chamber and on one side of the first bevel gear. One end of each of the two take-up rollers passes through one side of the groove and extends into one of the two power chambers, with one end of the take-up roller coaxially connected to the second bevel gear. A first motor is fixedly mounted on one side of the movable plate, with its output end passing through one side of the movable plate, extending into one of the power chambers, and coaxially connected to one of the first bevel gears. One end of one of the first bevel gears passes through one side of one power chamber and extends into the other power chamber, with one end of the first bevel gear coaxially connected to the other first bevel gear.

[0020] In this technical solution, when the first motor is powered on and started, the output shaft of the first motor will drive one of the first bevel gears to rotate, and one of the first bevel gears will drive the other first bevel gear to rotate. Under the action of meshing, the two first bevel gears will drive the two second bevel gears to rotate respectively, and then the two second bevel gears will drive the two take-up rollers to rotate respectively.

[0021] In the above technical solution, the output shaft of the first motor is rotatably connected to the moving plate, the first bevel gear meshes with the corresponding second bevel gear, and one end of the take-up roller is rotatably connected to the corresponding power cavity.

[0022] In this technical solution, the output shaft of the second motor is ensured to rotate within the moving plate. Under the action of meshing, the rotation of the first bevel gear drives the rotation of the second bevel gear, ensuring that one end of the take-up roller can rotate within the power chamber.

[0023] Furthermore, the above technical solution also includes:

[0024] Two cavities are provided, both of which are located within the top plate and on opposite sides of the two limiting grooves. An electric push rod is fixedly installed in each cavity. The output end of the electric push rod passes through the bottom of the cavity and is fixedly mounted with a fixing nail. The output shaft of the electric push rod is slidably connected to the top plate.

[0025] In this technical solution, during use, the operator can push the entire device to the oil well location using the four casters and the handle on the top plate. The operator can then power on and start the two electric push rods. The output shaft of the electric push rods will drive the fixing nails downward, causing them to insert into the soil, thereby initially fixing the position of the top plate.

[0026] In the above technical solution, the limiting block and the moving plate are integrally formed.

[0027] In this technical solution, the structural stability between the limiting block and the moving plate is ensured.

[0028] In the above technical solution, furthermore, counterweights are fixedly installed at the bottom of the connecting plate and on both sides of the rangefinder, and a storage battery is fixedly installed at the top of the connecting plate and between the two guide tubes. The storage battery is electrically connected to the rangefinder, and the wire rope is in contact with the inner wall of the guide tube.

[0029] In this technical solution, the connecting plate will be displaced downwards under the weight of the two counterweights, ensuring that the battery can provide power to the rangefinder and that the wire rope will not sway when the guide tube is displaced.

[0030] The beneficial effects of this utility model are:

[0031] 1. This oil drill uses a downhole positioning device. Through the cooperation of the top plate, support legs and casters, it can ensure that the whole device can be moved without the need for staff to move the whole device, saving time and effort.

[0032] 2. This oil drill uses a downhole positioning device. Through the cooperation of the moving plate, through groove, groove, take-up roller, wire rope, fixed plate, connecting plate, rangefinder, drive assembly and power assembly, it ensures that the rangefinder can be moved directly above the wells of different diameters, making operation more convenient and faster. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0034] Figure 2 This is one of the structural diagrams of the top plate in this utility model;

[0035] Figure 3This is a schematic diagram of the internal structure of the movable plate in this utility model;

[0036] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0037] Figure 5 This is the second schematic diagram of the internal structure of the top plate in this utility model;

[0038] Figure 6 This is a cross-sectional structural diagram of the top plate in this utility model;

[0039] Figure 7 This is a schematic diagram of the regional structure of the connecting plate in this utility model;

[0040] Figure 8 This is a schematic diagram of the structure of the movable plate and the limiting block in this utility model.

[0041] The markings in the diagram are as follows:

[0042] 1. Top plate; 2. Support leg; 3. Caster wheel; 4. Fixing pin; 5. First motor; 6. Moving plate; 7. Second motor; 8. Round rod; 9. Limiting block; 10. Take-up roller; 11. Wire rope; 12. Power chamber; 13. First bevel gear; 14. Second bevel gear; 15. Threaded rod; 16. Electric push rod; 17. Limiting groove; 18. Through groove; 19. Connecting plate; 20. Cavity; 21. Fixing plate; 22. Battery; 23. Guide tube; 24. Rangefinder; 25. Counterweight; 26. Groove. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0044] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0045] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0046] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0047] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0048] Example 1:

[0049] Please see Figure 1 - Figure 8 As shown, this embodiment provides a downhole positioning device for oil drilling, including a rangefinder 24, and further comprising:

[0050] The top plate 1 has four support legs 2 fixedly installed at its bottom. The support legs 2 have casters 3 fixedly installed at their bottoms. The top plate 1 has a through groove 18. A movable plate 6 is slidably installed in the through groove 18. The movable plate 6 has a groove 26. Two take-up rollers 10 are rotatably installed in the groove 26. Steel wire ropes 11 are wound on the take-up rollers 10. A fixed plate 21 is fixedly installed at the bottom of the movable plate 6. Two guide tubes 23 are fixedly installed at the bottom of the fixed plate 21. One end of each of the two steel wire ropes 11 passes through the two guide tubes 23 and is fixedly installed on the same connecting plate 19. A rangefinder 24 is fixedly installed at the bottom of the connecting plate 19.

[0051] A drive assembly is located inside the top plate 1 and is used to drive the displacement of the moving plate 6.

[0052] The power unit is located inside the movable plate 6 and is used to drive the two take-up rollers 10 to rotate.

[0053] In operation, the operator can use the four casters 3 and the handle on the top plate 1 to push the entire device to the oil well location. The operator can then power on the two electric push rods 16 and start them. The output shaft of the electric push rods 16 will drive the fixing nails 4 to move downwards, allowing the fixing nails 4 to insert into the soil, thus initially fixing the position of the top plate 1. Subsequently, the drive component will drive the moving plate 6 to move. When the rangefinder 24 is directly above the oil well, the power component will drive the two take-up rollers 10 to rotate. The connecting plate 19 will move downwards, causing the wire rope 11 wound on the take-up rollers 10 to slowly unwind. At this time, the wire rope 11 will slide within the guide tube 23 at one end. Under the action of the guide tube 23, the wire rope 11 will not sway, thus ensuring the stability of the downward movement of the connecting plate 19. Subsequently, the rangefinder 24 will perform distance measurement and positioning.

[0054] Example 2:

[0055] This embodiment provides a downhole positioning device for oil drilling, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including a drive component:

[0056] A threaded rod 15 is rotatably installed in a through groove 18. One end of the threaded rod 15 extends into a movable plate 6. Limiting grooves 17 are provided in the top plate 1 on both sides of the through groove 18. A round rod 8 is fixedly installed in the limiting groove 17. A limiting block 9 is slidably installed in the limiting groove 17 and on the round rod 8. The limiting block 9 is fixed to the movable plate 6.

[0057] The second motor 7 is fixedly installed on the top plate 1. The output end of the second motor 7 extends through one side of the top plate 1 into the through groove 18 and is coaxially connected to the threaded rod 15.

[0058] When the second motor 7 is powered on and started, the output shaft of the second motor 7 will drive the threaded rod 15 to rotate. Under the action of the thread, the threaded rod 15 will drive the moving plate 6 to move. The moving plate 6 will drive the two limit blocks 9 to slide on the corresponding connecting plate 19, making the displacement of the moving plate 6 more stable.

[0059] Example 3:

[0060] This embodiment provides a downhole positioning device for oil drilling. In addition to the technical solutions of the above embodiments, it also has the following technical features: the output shaft of the second motor 7 is rotatably connected to the top plate 1, the moving plate 6 is threadedly connected to the threaded rod 15, and the limiting block 9 is slidably connected to the round rod 8.

[0061] Specifically, it ensures that the output shaft of the second motor 7 can rotate normally within the top plate 1, and under the action of the thread, it ensures that the threaded rod 15 can drive the moving plate 6 to move when it rotates, and ensures that the limit block 9 can slide on the round rod 8.

[0062] Example 4:

[0063] This embodiment provides a downhole positioning device for oil drilling, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including a power assembly comprising:

[0064] Two power chambers 12 are located within the movable plate 6 and on one side of the groove 26. A first bevel gear 13 is rotatably mounted in each power chamber 12, and a second bevel gear 14 is rotatably mounted in each power chamber 12 on one side of the first bevel gear 13. One end of each of the two take-up rollers 10 passes through one side of the groove 26 and extends into the two power chambers 12 respectively. One end of the take-up roller 10 is coaxially connected to the second bevel gear 14. A first motor 5 is fixedly mounted on one side of the movable plate 6. The output end of the first motor 5 passes through one side of the movable plate 6 and extends into one of the power chambers 12, and is coaxially connected to one of the first bevel gears 13. One end of one of the first bevel gears 13 passes through one side of one of the power chambers 12 and extends into the other power chamber 12. One end of one of the first bevel gears 13 is coaxially connected to the other first bevel gear 13.

[0065] When the first motor 5 is powered on and started, the output shaft of the first motor 5 will drive one of the first bevel gears 13 to rotate, and one of the first bevel gears 13 will drive the other first bevel gear 13 to rotate. Under the action of meshing, the two first bevel gears 13 will drive the two second bevel gears 14 to rotate respectively, and then the two second bevel gears 14 will drive the two take-up rollers 10 to rotate respectively.

[0066] Example 5:

[0067] This embodiment provides a downhole positioning device for oil drilling. In addition to the technical solutions of the above embodiments, it also has the following technical features: the output shaft of the first motor 5 is rotatably connected to the moving plate 6, the first bevel gear 13 meshes with the corresponding second bevel gear 14, and one end of the take-up roller 10 is rotatably connected to the corresponding power chamber 12.

[0068] Specifically, it ensures that the output shaft of the second motor 7 can rotate within the moving plate 6. Under the action of meshing, it ensures that the rotation of the first bevel gear 13 will drive the rotation of the second bevel gear 14, ensuring that one end of the take-up roller 10 can rotate within the power chamber 12.

[0069] Example 6:

[0070] This embodiment provides a downhole positioning device for oil drilling, which, in addition to the technical solutions of the above embodiments, also has the following technical features and includes:

[0071] Two cavities 20 are formed in the top plate 1 and are located on opposite sides of the two limiting grooves 17. An electric push rod 16 is fixedly installed in the cavity 20. The output end of the electric push rod 16 passes through the bottom of the cavity 20 and is fixedly installed with a fixing nail 4. The output shaft of the electric push rod 16 is slidably connected to the top plate 1.

[0072] In use, workers can push the entire device to the oil well location using the four casters 3 and the handle on the top plate 1. Workers can then power on and start the two electric push rods 16. The output shaft of the electric push rods 16 will drive the fixing nails 4 to move downward, so that the fixing nails 4 are inserted into the soil, thereby initially fixing the position of the top plate 1.

[0073] Example 7:

[0074] This embodiment provides a downhole positioning device for oil drilling. In addition to the technical solutions of the above embodiments, it also has the following technical features: the limiting block 9 and the moving plate 6 are integrally formed.

[0075] Among these measures, it is essential to ensure the structural stability between the limiting block 9 and the moving plate 6.

[0076] Example 8:

[0077] This embodiment provides a downhole positioning device for oil drilling. In addition to the technical solution of the above embodiment, it also has the following technical features: counterweights 25 are fixedly installed at the bottom of the connecting plate 19 and on both sides of the rangefinder 24; a battery 22 is fixedly installed at the top of the connecting plate 19 and between the two guide tubes 23; the battery 22 is electrically connected to the rangefinder 24; and the wire rope 11 is in contact with the inner wall of the guide tube 23.

[0078] Specifically, under the influence of the gravity of the two counterweights 25, the connecting plate 19 will move downwards, ensuring that the battery 22 can provide power to the rangefinder 24 and that the wire rope 11 will not sway when the guide tube 23 moves.

[0079] Working Principle: During use, the operator can push the entire device to the oil well location using the four casters 3 and the handle on the top plate 1. The operator can then power on and start the two electric push rods 16. The output shaft of the electric push rods 16 will drive the fixing pins 4 downwards, causing them to insert into the soil and thus initially fix the top plate 1. Subsequently, the operator can power on and start the second motor 7. The output shaft of the second motor 7 will drive the threaded rod 15 to rotate. Under the action of the thread, the threaded rod 15 will drive the moving plate 6 to move. The moving plate 6 will then cause the two limit blocks 9 to slide on the corresponding connecting plates 19, making the movement of the moving plate 6 more stable. When the rangefinder 24 is directly above the oil well, the operator can power on the first motor 5. The motor 5 is activated, and its output shaft drives one of the first bevel gears 13 to rotate. This first bevel gear 13 then drives the other first bevel gear 13 to rotate. Under the meshing action, the two first bevel gears 13 drive the two second bevel gears 14 to rotate, which in turn drive the two take-up rollers 10 to rotate. Under the gravity of the two counterweights 25, the connecting plate 19 moves downward, causing the wire rope 11 wound on the take-up roller 10 to slowly unwind. At this time, the wire rope 11 slides within the guide tube 23 at one end. The guide tube 23 ensures that the wire rope 11 does not sway, thus ensuring the stability of the downward movement of the connecting plate 19. Subsequently, the rangefinder 24 performs distance measurement and positioning.

[0080] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A downhole positioning device for oil drilling, comprising a rangefinder (24), characterized in that, Also includes: The top plate (1) has four support legs (2) fixedly installed at its bottom. The support legs (2) have casters (3) fixedly installed at their bottoms. The top plate (1) has a through groove (18) inside. A movable plate (6) is slidably installed in the through groove (18). A groove (26) is opened in the movable plate (6). Two take-up rollers (10) are rotatably installed in the groove (26). Steel wire ropes (11) are wound on the take-up rollers (10). A fixed plate (21) is fixedly installed at the bottom of the movable plate (6). Two guide tubes (23) are fixedly installed at the bottom of the fixed plate (21). One end of each of the two steel wire ropes (11) passes through the two guide tubes (23) and is fixedly installed on the same connecting plate (19). The rangefinder (24) is fixedly installed at the bottom of the connecting plate (19). A drive assembly located within the top plate (1) and used to drive the displacement of the moving plate (6); A power assembly located within a movable plate (6) is used to drive the two take-up rollers (10) to rotate.

2. A downhole positioning device for use in oil drilling according to claim 1, characterized in that The driving component includes: A threaded rod (15) is rotatably installed in a through groove (18). One end of the threaded rod (15) extends into a movable plate (6). Limiting grooves (17) are provided in the top plate (1) on both sides of the through groove (18). A round rod (8) is fixedly installed in the limiting groove (17). A limiting block (9) is slidably installed in the limiting groove (17) on the round rod (8). The limiting block (9) is fixed to the movable plate (6). The second motor (7) is fixedly installed on the top plate (1). The output end of the second motor (7) extends through one side of the top plate (1) into the through groove (18) and is coaxially connected to the threaded rod (15).

3. A downhole positioning device for use in oil drilling according to claim 2, characterized in that The output shaft of the second motor (7) is rotatably connected to the top plate (1), the moving plate (6) is threadedly connected to the threaded rod (15), and the limiting block (9) is slidably connected to the round rod (8).

4. A downhole positioning device for use in oil drilling according to claim 1, characterized in that The power assembly includes: Two power chambers (12) are provided, each located within a movable plate (6) and on one side of a groove (26). A first bevel gear (13) is rotatably mounted within each power chamber (12), and a second bevel gear (14) is rotatably mounted within each power chamber (12) and on one side of the first bevel gear (13). One end of each of the two take-up rollers (10) penetrates one side of the groove (26) and extends into the two power chambers (12), respectively. One end of each take-up roller (10) is connected to the second bevel gear (14). 4) Coaxial connection: A first motor (5) is fixedly installed on one side of the moving plate (6). The output end of the first motor (5) extends through one side of the moving plate (6) to one of the power chambers (12) and is coaxially connected with one of the first bevel gears (13). One end of one of the first bevel gears (13) extends through one side of one of the power chambers (12) and into another power chamber (12). One end of one of the first bevel gears (13) is coaxially connected with another first bevel gear (13).

5. A downhole positioning device for use in oil drilling according to claim 4, characterized in that The output shaft of the first motor (5) is rotatably connected to the moving plate (6), the first bevel gear (13) meshes with the corresponding second bevel gear (14), and one end of the take-up roller (10) is rotatably connected to the corresponding power chamber (12).

6. A downhole positioning device for use in oil drilling according to claim 1, characterized in that Also includes: Two cavities (20) are opened in the top plate (1) and are respectively located on the opposite side of the two limiting grooves (17). An electric push rod (16) is fixedly installed in the cavity (20). The output end of the electric push rod (16) passes through the bottom of the cavity (20) and is fixedly installed with a fixing nail (4). The output shaft of the electric push rod (16) is slidably connected to the top plate (1).

7. A downhole positioning device for use in oil drilling according to claim 3, characterized in that The limiting block (9) and the moving plate (6) are integrally formed.

8. A downhole positioning device for use in oil drilling according to claim 1, characterized in that Counterweights (25) are fixedly installed at the bottom of the connecting plate (19) and on both sides of the rangefinder (24). A battery (22) is fixedly installed at the top of the connecting plate (19) and between the two guide tubes (23). The battery (22) is electrically connected to the rangefinder (24). The wire rope (11) is in contact with the inner wall of the guide tube (23).

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