Shaft inner wall paraffin removal device

Abstract

The invention discloses a shaft inner wall paraffin removal device which comprises a mounting plate and a driving assembly fixedly connected to the bottom end of the mounting plate, four connecting plates are fixedly connected to the top end of the mounting plate in a circumferential array distribution mode, passing arc grooves are formed in the top ends of the four connecting plates, and positioning balls are symmetrically arranged on the two side walls of the passing arc grooves. A connecting sliding rail is rotationally connected between the symmetrical positioning balls, a fixing assembly is fixedly connected to the top end of the connecting sliding rail, telescopic assemblies are slidably connected into the fixing assembly, connecting assemblies are fixedly connected to the ends, close to each other, of the telescopic assemblies, and a driving assembly is fixedly connected to the middle of the fixing assembly. According to the device, the components for removing wax layers synchronously and stably move while the device can remove wax on the inner walls of wellbores with different calibers, meanwhile, the supporting rods and the jacking springs are arranged in a matched mode so that the cleaning scraping plates can be stressed to move, damage to the cleaning scraping plates is prevented, the service life of the cleaning scraping plates is prolonged, and the scraping effect is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of wax cleaning devices for inner walls of wellbores, and in particular to a wax cleaning device for inner walls of wellbores. Background Art

[0002] A wellbore refers to the main vertical passage from the ground to the underground ore layer or from the underground ore layer to the ground. It is widely used in mining, oil and gas mining, and some underground projects. It connects the ground and underground working areas. Its cross section is generally circular. For example, in the process of oil extraction, the wax components contained in the crude oil will be deposited on the inner wall of the wellbore with the changes in temperature and pressure. The deposition of wax will reduce the effective inner diameter of the wellbore and increase the resistance to fluid flow. When the wax is deposited on the inner wall of the oil pipe to a certain thickness, the output of the oil well will drop significantly. In severe cases, it may cause the oil well to be blocked and unable to produce normally. In addition, the presence of wax may affect the normal operation of downhole equipment, block downhole safety valves and other equipment, and increase the risk of equipment failure. Therefore, it is necessary to use a suitable wellbore inner wall wax cleaning device to clean the inner wall of the wellbore to ensure the normal use of the wellbore.

[0003] For example, a wax cleaning device for a self-flowing wellbore disclosed in the authorization announcement number CN216588546U belongs to the technical field of wellbore cleaning equipment. The device includes a main shaft, a rotating cylinder, an impeller and a cleaning brush; a connecting portion is arranged at the upper end of the main shaft for connecting to the upper pipe column; the rotating cylinder is coaxially sleeved on the outer wall of the main shaft and is rotatably connected to the main shaft; there are multiple impellers and they are arranged on the outer wall of the rotating cylinder. When the fluid flows through the impeller, the impeller drives the rotating cylinder to rotate around the main shaft. The cleaning brush is located on the outer wall of the rotating cylinder and can rotate with the rotating cylinder and clean the inner wall of the wellbore. The device adjusts the position of the cleaning brush through a retractable structure, and the retractable structure is connected in a threaded connection and requires individual adjustment, which can easily make the adjustment distance inconsistent and affect the stability of the device operation. The retractable structure formed by the threaded connection makes the position of the cleaning brush difficult to control, affecting the cleaning effect. Summary of the invention

[0004] The object of the present invention is to provide a wax cleaning device for the inner wall of a wellbore, so as to solve the problem proposed in the above-mentioned background technology that the position of a cleaning brush is adjusted by a retractable structure, and the retractable structure is connected in a threaded manner and requires individual adjustment, which can easily lead to inconsistent adjustment distances and affect the stability of the operation of the device. The retractable structure formed by the threaded connection makes it difficult to control the position of the cleaning brush, affecting the cleaning effect.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wax cleaning device for the inner wall of a wellbore, comprising a mounting plate and a driving component fixedly connected to the bottom end of the mounting plate, the top of the mounting plate being distributed in a circular array and fixedly connected with four connecting plates, the tops of the four connecting plates are each provided with a through arc groove, and the two side walls of the through arc groove are symmetrically provided with positioning balls, and a connecting slide rail is rotatably connected between the symmetrical positioning balls, the top of the connecting slide rail is fixedly connected with a fixing component, the inside of the fixing component is slidably connected with a telescopic component, and the ends of the telescopic components close to each other are fixedly connected with the connecting component, and the middle of the fixing component is fixedly connected with a driving component, and a cleaning scraper is attached to the inner wall of the wellbore to scrape off the wax layer on the inner wall of the wellbore, so that the device can clean wax on the inner wall of the wellbore of different calibers while making the components for removing the wax layer move synchronously and stably, and at the same time, the supporting rod and the top spring provided in combination make the cleaning scraper move under force, so as to prevent damage to the cleaning scraper and extend the service life of the cleaning scraper, and the components for removing the wax layer are driven to rotate synchronously by the operation of the submersible motor, so as to ensure the stable output of the driving force for scraping off the wax layer and the scraping effect.

[0006] Preferably, the driving assembly includes a waterproof power supply chassis, which is fixedly connected to the bottom end, and the waterproof power supply chassis is electrically connected to a submersible motor to form a stable power supply drive system. The provision of the submersible motor enables the device to work underwater.

[0007] Preferably, the fixing assembly includes a connecting slide rail, which is rotatably connected between two symmetrical positioning balls, and the top of the connecting slide rail is fixedly connected to a fixing frame in a circular array, a mounting groove is provided inside the fixing frame, and two guide rods are symmetrically fixedly connected inside the fixing frame, and limit blocks are symmetrically fixedly connected to the inner walls on both sides of the fixing frame. The setting of the limit blocks limits the movement of the sliding plate to prevent the sliding plate from falling off the fixing plate.

[0008] Preferably, the telescopic assembly includes a sliding plate, which is slidably connected to the inside of the fixed frame, one end of the sliding plate is provided with a through hole matching the guide rod, and both sides of the sliding plate are provided with limit sliding grooves matching the limit blocks, the sliding plate is symmetrically threaded with a support rod, one end of the two support rods are each provided with a top spring, the other ends of the two support rods are slidably connected to a mounting block, the top of the mounting block is fixedly connected to a cleaning scraper by bolts, and the end of the sliding plate away from the fixed frame is fixedly connected to a guide assembly, and the cleaning scraper slides on the support rod and cooperates with the spring to enable the cleaning scraper to slide along the support rod when subjected to a strong impact force, thereby reducing the damage rate of the cleaning scraper and extending the service life of the cleaning scraper.

[0009] Preferably, the guide assembly includes a fixed transverse plate, which is symmetrically fixedly connected to one end of the sliding plate away from the fixed frame, and a connecting screw is threadedly connected between the two symmetrical fixed transverse plates. A rotating roller is rotatably connected to the outer side of the connecting screw, and a plurality of contact balls are equidistantly rotatably connected to the outer side of the rotating roller. The rotating roller cooperates with the contact balls so that when it contacts the inner wall of the wellbore, it can move in multiple directions without affecting the overall moving path of the device.

[0010] Preferably, the connecting assembly includes a first connecting frame, the first connecting frame is fixedly connected to the top of the sliding plate, the first connecting frame is rotatably connected to a transmission plate, and the other end of the transmission plate is rotatably connected to a second connecting frame, so that when the second connecting frame is raised or lowered, the first connecting frame slides horizontally, thereby pushing or pulling the sliding plate to move, forming a linkage, which is convenient for simultaneously adjusting the movement of the sliding plates.

[0011] Preferably, the driving assembly includes a fixed column, which is fixedly connected to the middle part of the top end of the fixed frame, a rectangular limiting groove is provided on the outer wall of the fixed column, a lifting ring is sleeved on the outer side of the fixed column, a driving ring is rotatably connected to the top end of the lifting ring, an internal thread groove matching the fixed column is provided inside the driving ring, a guide plate matching the rectangular limiting groove is fixedly connected to the inner wall of the lifting ring, and the rotation of the driving ring drives the lifting ring to move along the fixed column, thereby providing power for the lifting and lowering of the second connecting frame.

[0012] Preferably, the top end of the fixed column is rotatably connected to a rotating ring seat, and the top end of the rotating ring seat is rotatably connected to a connecting ring. When the device is put into the wellbore, it is connected to the winch without affecting the rotation of the device.

[0013] Preferably, the second connecting frame is fixedly connected to the outer side of the lifting ring, and the first connecting frame and the second connecting frame are each composed of two vertical plates and a horizontal axis, and the horizontal axis passes through a transmission plate, and the transmission plate can rotate along the horizontal axis so that both ends of the transmission plate can rotate, thereby realizing the conversion of vertical movement into horizontal movement.

[0014] Preferably, the submersible motor output shaft extends through, and the top end of the submersible motor output shaft is fixedly connected to the bottom end of the fixing frame, so as to facilitate the rotation of the fixing frame driven by the submersible motor.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Through the designed first connecting frame, transmission plate, second connecting frame, lifting ring, driving ring, guide plate, internal thread groove and fixed column, the driving ring rotates and screws with the fixed column, so that the lifting ring lifts and drives the first connecting frame, the transmission plate and the second connecting frame to move, so that the sliding plate slides synchronously in the fixed frame, thereby driving the rotating roller and the contact ball to move and contact the inner wall of the wellbore, so that the cleaning scraper fits the inner wall of the wellbore to scrape off the wax layer on the inner wall of the wellbore, so that the device can clean the wax on the inner wall of wellbores of different calibers while making the components for removing the wax layer move synchronously and stably, and at the same time, the supporting rod and the top spring provided make the cleaning scraper move under force, thereby preventing damage to the cleaning scraper and extending the service life of the cleaning scraper;

[0017] By designing the mounting plate, waterproof power supply chassis, submersible motor, connecting frame, arc grooves, positioning balls, and connecting slide rails, the submersible motor drives the components for removing the wax layer to rotate synchronously, ensuring the stable output of the driving force for scraping the wax layer and the scraping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is the front view of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structure of the fixing frame of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the lifting ring and the driving ring of the present invention;

[0022] Figure 5 For the present invention Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0023] Figure 6 For the present invention Figure 2 Schematic diagram of the local enlarged structure at point B in the middle.

[0024] In the figure: 1. Mounting plate; 2. Waterproof power supply chassis; 3. Submersible motor; 4. Connecting plate; 5. Through arc groove; 6. Positioning ball; 7. Connecting slide rail; 8. Fixed frame; 9. Mounting groove; 10. Guide rod; 11. Limit block; 12. Sliding plate; 13. Limit slide groove; 14. Fixed cross plate; 15. Connecting screw; 16. Rotating roller; 17. Contact ball; 18. Support rod; 19. Top spring; 20. Mounting block; 21. Cleaning scraper; 22. First connecting frame; 23. Transmission plate; 24. Second connecting frame; 25. Lifting ring; 26. Drive ring; 27. Guide plate; 28. Internal thread groove; 29. ​​Fixed column; 30. Rectangular limit groove; 31. Rotating ring seat; 32. Connecting ring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] See also Figure 1-6 The present invention provides a wax cleaning device for the inner wall of a wellbore, comprising a mounting plate 1 and a driving component fixedly connected to the bottom end of the mounting plate 1. The top of the mounting plate 1 is fixedly connected with four connecting plates 4 distributed in a circular array. The tops of the four connecting plates 4 are all provided with arc grooves 5. Both side walls of the arc grooves 5 are symmetrically provided with positioning balls 6. Connecting slide rails 7 are rotatably connected between the symmetrical positioning balls 6. A fixing component is fixedly connected to the top of the connecting slide rail 7. A telescopic component is slidably connected inside the fixing component. The ends of the telescopic components close to each other are fixedly connected with the connecting components. The middle of the fixing component is fixedly connected with a driving component.

[0027] Furthermore, the driving component includes a waterproof power supply chassis 2, which is fixedly connected to the bottom end of the mounting plate 1. The waterproof power supply chassis 2 is electrically connected to a submersible motor 3. The waterproof power supply chassis 2 is provided with components such as contactors, relays, and frequency converters for controlling the operation of the submersible motor 3. The setting of the submersible motor 3 enables the device to work underwater, which is more suitable for the working environment.

[0028] Furthermore, the fixing assembly includes a connecting rail 7, which is rotatably connected between two symmetrical positioning balls 6. A fixing frame 8 is fixedly connected to the top of the connecting rail 7 in a circular array. A mounting groove 9 is provided inside the fixing frame 8. Two guide rods 10 are symmetrically fixedly connected inside the fixing frame 8. The two guide rods 10 are arranged inside the mounting groove 9. Limiting blocks 11 are symmetrically fixedly connected to the inner walls on both sides of the fixing frame 8, so that the connecting rail 7 can be limited and rotate smoothly at the same time. The rotation of the connecting rail 7 can drive the fixing frame 8 to rotate.

[0029] Furthermore, the telescopic assembly includes a sliding plate 12, which is slidably connected to the inside of the fixed frame 8. A through hole matching the guide rod 10 is provided at one end of the sliding plate 12, and limiting sliding grooves 13 matching the limit blocks 11 are provided on both sides of the sliding plate 12. Support rods 18 are symmetrically threadedly connected inside the sliding plate 12. The sliding plate 12 can slide along the two support rods 18. The support rods 18 are threaded at one end close to the sliding plate 12, so that the sliding plate 12 is easy to disassemble and facilitate subsequent inspection and maintenance of the device. One end of the two support rods 18 is provided with a top spring 19, and the other end of the two support rods 18 is slidably connected to a mounting block 20. The top of the mounting block 20 is fixedly connected to a cleaning scraper 21 by bolts, and the end of the sliding plate 12 away from the fixed frame 8 is fixedly connected to the guide assembly.

[0030] Furthermore, the guide assembly includes a fixed transverse plate 14, which is symmetrically fixedly connected to one end of the sliding plate 12 away from the fixed frame 8, and a connecting screw 15 is threadedly connected between the two symmetrical fixed transverse plates 14. A rotating roller 16 is rotatably connected to the outer side of the connecting screw 15, and a plurality of contact balls 17 are equidistantly rotatably connected to the outer side of the rotating roller 16. The arrangement of the rotating roller 16 and the contact balls 17 makes the device more adaptable to the inner wall structure of the wellbore when moving up and down or rotating.

[0031] Furthermore, the connecting assembly includes a first connecting frame 22, the first connecting frame 22 is fixedly connected to the top of the sliding plate 12, the first connecting frame 22 is rotatably connected to a transmission plate 23, and the other end of the transmission plate 23 is rotatably connected to a second connecting frame 24. When the second connecting frame 24 moves up and down, it pushes or pulls the transmission plate 23 to transmit the first connecting frame 22, thereby making the first connecting frame 22.

[0032] Furthermore, the driving assembly includes a fixed column 29, which is fixedly connected to the middle part of the top of the fixed frame 8. A rectangular limiting groove 30 is provided on the outer wall of the fixed column 29. A lifting ring 25 is sleeved on the outer side of the fixed column 29. A driving ring 26 is rotatably connected to the top of the lifting ring 25. An internal thread groove 28 matching the fixed column 29 is provided inside the driving ring 26. A guide plate 27 matching the rectangular limiting groove 30 is fixedly connected to the inner wall of the lifting ring 25. The setting of the guide plate 27 enables the lifting ring 25 to move along the rectangular limiting groove 30, so that the lifting ring 25 slides along the fixed column 29 as a whole.

[0033] Furthermore, a rotating ring seat 31 is rotatably connected to the top of the fixed column 29 , and a connecting ring 32 is rotatably connected to the top of the rotating ring seat 31 . When the device is used, the winch rope on the winch is connected to the connecting ring 32 .

[0034] Furthermore, the second connecting frame 24 is fixedly connected to the outer side of the lifting ring 25. The first connecting frame 22 and the second connecting frame 24 are both composed of two vertical plates and a horizontal axis, and the horizontal axis passes through the transmission plate 23. The transmission plate 23 can rotate along the horizontal axis. When the second connecting frame 24 moves, one end of the transmission plate 23 rotates along the horizontal axis on the second connecting frame 24, and at the same time, the other end of the transmission plate 23 rotates along the horizontal axis on the first connecting frame 22.

[0035] Furthermore, the output shaft of the submersible motor 3 extends through the mounting plate 1 , and the top end of the output shaft of the submersible motor 3 is fixedly connected to the bottom end of the fixing frame 8 , and the operation of the submersible motor 3 drives the fixing frame 8 to rotate.

[0036] When using the embodiment of the present application:

[0037] Before using the device, first connect the winch rope with the connecting ring 32, then rotate the drive ring 26, and the drive ring 26 rotates and screws into the fixed column 29, driving the lifting ring 25 to slide along the fixed column 29, and the guide plate 27 slides along the rectangular limit groove 30, so that the second connecting frame 24 follows the movement, driving the transmission plate 23 to transmit, so that the first connecting frame 22 moves, pushing or pulling the sliding plate 12 to slide in the mounting groove 9 inside the fixed frame 8, at this time the sliding plate 12 slides along the support rod 18, so that the fixed cross plate 14, the connecting screw 15, the rotating roller 16, and the contact ball 17 move accordingly, so that the contact ball 17 contacts the wellbore, and then start the submersible motor 3, the submersible motor 3 rotates to drive the connecting slide rail 7 and the fixed frame 8 to rotate, so that the parts installed on the fixed frame 8 rotate, so that the cleaning scraper 21 rotates to scrape the wax layer on the inner wall of the wellbore.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wax cleaning device for the inner wall of a wellbore, comprising a mounting plate (1) and a driving assembly fixedly connected to the bottom end of the mounting plate (1), characterized in that; The top of the mounting plate (1) is fixedly connected to four connecting plates (4) distributed in a circular array, the tops of the four connecting plates (4) are all provided with through arc grooves (5), the two side walls of the through arc grooves (5) are symmetrically provided with positioning balls (6), the symmetrical positioning balls (6) are rotatably connected with connecting slide rails (7), the tops of the connecting slide rails (7) are fixedly connected to a fixing component, the inside of the fixing component is slidably connected to a telescopic component, the ends of the telescopic components close to each other are fixedly connected to a connecting component, and the middle of the fixing component is fixedly connected to a driving component.

2. A wax cleaning device for the inner wall of a wellbore according to claim 1, characterized in that: The driving assembly comprises a waterproof power supply chassis (2), wherein the waterproof power supply chassis (2) is fixedly connected to the bottom end of the mounting plate (1), and the waterproof power supply chassis (2) is electrically connected to a submersible motor (3) inside.

3. A wax cleaning device for the inner wall of a wellbore according to claim 1, characterized in that: The fixing assembly comprises a connecting slide rail (7), the connecting slide rail (7) is rotatably connected between two symmetrical positioning balls (6), the top end of the connecting slide rail (7) is fixedly connected to a fixing frame (8) in a circular array, a mounting groove (9) is provided inside the fixing frame (8), two guide rods (10) are symmetrically fixedly connected inside the fixing frame (8), and limiting blocks (11) are symmetrically fixedly connected to the inner walls on both sides of the fixing frame (8).

4. A wax cleaning device for the inner wall of a wellbore according to claim 1, characterized in that: The telescopic assembly comprises a sliding plate (12), the sliding plate (12) being slidably connected to the interior of a fixed frame (8), a through hole matching the guide rod (10) being provided at one end of the sliding plate (12), limiting sliding grooves (13) matching the limiting blocks (11) being provided at both sides of the sliding plate (12), a support rod (18) being symmetrically threadedly connected to the interior of the sliding plate (12), a top spring (19) being sleeved at one end of the two support rods (18), a mounting block (20) being slidably connected to the other end of the two support rods (18), a cleaning scraper (21) being fixedly connected to the top of the mounting block (20) by bolts, and a guide assembly being fixedly connected to the end of the sliding plate (12) away from the fixed frame (8).

5. A wax cleaning device for the inner wall of a wellbore according to claim 4, characterized in that: The guide assembly comprises a fixed transverse plate (14), wherein the fixed transverse plate (14) is symmetrically fixedly connected to one end of the sliding plate (12) away from the fixed frame (8), a connecting screw (15) is threadedly connected between the two symmetrical fixed transverse plates (14), a rotating roller (16) is rotatably connected to the outer side of the connecting screw (15), and a plurality of contact balls (17) are equidistantly rotatably connected to the outer side of the rotating roller (16).

6. A wax cleaning device for the inner wall of a wellbore according to claim 1, characterized in that: The connecting assembly comprises a first connecting frame (22), the first connecting frame (22) is fixedly connected to the top end of the sliding plate (12), the first connecting frame (22) is rotatably connected to a transmission plate (23), and the other end of the transmission plate (23) is rotatably connected to a second connecting frame (24).

7. A wax cleaning device for the inner wall of a wellbore according to claim 1, characterized in that: The driving assembly comprises a fixed column (29), the fixed column (29) is fixedly connected to the middle part of the top end of the fixed frame (8), the outer wall of the fixed column (29) is provided with a rectangular limiting groove (30), the outer side of the fixed column (29) is sleeved with a lifting ring (25), the top end of the lifting ring (25) is rotatably connected to a driving ring (26), the inside of the driving ring (26) is provided with an internal thread groove (28) matching the fixed column (29), and the inner wall of the lifting ring (25) is fixedly connected with a guide plate (27) matching the rectangular limiting groove (30).

8. A wax cleaning device for the inner wall of a wellbore according to claim 7, characterized in that: The top end of the fixed column (29) is rotatably connected to a rotating ring seat (31), and the top end of the rotating ring seat (31) is rotatably connected to a connecting ring (32).

9. A wax cleaning device for the inner wall of a wellbore according to claim 6, characterized in that: The second connecting frame (24) is fixedly connected to the outside of the lifting ring (25); the first connecting frame (22) and the second connecting frame (24) are both composed of two vertical plates and a horizontal axis, and the horizontal axis passes through the transmission plate (23); the transmission plate (23) can rotate along the horizontal axis.

10. A wax cleaning device for the inner wall of a wellbore according to claim 2, characterized in that: The output shaft of the submersible motor (3) extends through the mounting plate (1), and the top end of the output shaft of the submersible motor (3) is fixedly connected to the bottom end of the fixing frame (8).

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