Wax and scale removal device for oil well

Abstract

The utility model discloses an oil well dewaxing and descaling device which comprises a fixing column and a pulley, the pulley is connected to the outer wall of the fixing column, a pair of limiting plates is installed on the fixing column, a plurality of pairs of scrapers are connected between the pair of limiting plates in a sliding mode, the fixing column is provided with an electric push rod, and the portion, located above the limiting plates, of the fixing column is rotationally connected with an inner gear. According to the oil well wax and scale removal device, the fixing column is fed into the bottom end of a wax removal section of an oil well pipe, the electric push rod shrinks, the pulley abuts against the interior of the oil well pipe, and the sliding block pushes the scraping piece to slide outwards so that the scraping piece can be attached to the inner wall of the oil well pipe. When the fixing column is pulled to move upwards, the scraping piece can scrape off oil wax on the inner wall of the oil well pipe and push the oil wax to be discharged from the top end of the oil well pipe, the motor drives the scraping rod to rotate, dirt firmly attached to the inner wall of the oil well pipe can be effectively scraped off, and then the dirt and the oil wax are pushed out of the oil well pipe together under the action of the scraping piece.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum exploitation, in particular to an oil well wax and scale removal device. Background Art

[0002] The main component of crude oil extracted from oil wells is hydrocarbons, which contain paraffin to varying degrees and quantities. During the process of oil well opening and production, the temperature becomes lower as the oil well goes up, and temperature is one of the important factors affecting the wax formation in oil wells. When the temperature of crude oil is lower than the wax precipitation point of crude oil, the wax originally dissolved in the crude oil will precipitate and mainly condense on the inner wall of the oil well. If these wax blocks on the well wall are not cleaned in time, oil well blockage incidents are likely to occur, resulting in a continuous decline in oil well production and even causing the oil well to stop production.

[0003] The existing Chinese utility model patent, publication number: CN 213360076 U, is named: an oil well wax scraping device, which is firmly connected to an external cable or a descending component through an I-shaped connector or a connecting limit ring. During the descent process, the output shaft of the rotating motor drives the driving gear to rotate, the driving gear meshes and drives the driven gear to rotate, and the driven gear then drives the cutting wheel to rotate. The wax scraping blade outside the cutting wheel scrapes the oil wax on the inner wall of the oil well. At the same time, the waste wax receiving groove at the bottom plays a role in receiving the scraped waste wax, and will not cause secondary pollution. The articulated rod can drive the pulley to rotate so that the pulley slides smoothly along the inner wall of the oil well.

[0004] However, in actual use, the entire device needs to be hoisted into the interior of the oil well pipe. Although the oil wax dirt firmly adhering to the inner wall of the oil well pipe can be cleaned, the receiving groove is large in volume during the descent process, and it is easy to form a shear force with the inner wall of the oil well pipe, so that the oil wax on the inner wall of the oil well pipe below the receiving groove is pushed to the bottom of the oil well pipe, increasing the workload of cleaning. Summary of the invention

[0005] The utility model aims to provide an oil well wax and scale removal device to solve the problem that the receiving tank is large in volume and the oil wax is easily pushed to the bottom of the oil well pipe.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil well wax and scale removal device, comprising a fixed column and a pulley, the outer wall of the fixed column is connected to the pulley, the fixed column is connected to a scraping mechanism, the scraping mechanism comprises a limiting plate, a pair of limiting plates are installed on the fixed column, a plurality of pairs of scrapers are slidably connected between the pair of limiting plates, a slider is installed at the bottom end of the scraper, the scraper is slidably connected to the limiting plate through the slider, a control rod is rotatably connected to the slider, a support rod is installed at the bottom end of the limiting plate, the control rod and the support rod are slidably connected, the fixed column is equipped with an electric push rod, the output end of the electric push rod is installed on the fixed column, a control ring is installed on the electric push rod, and the control rod and the control ring are rotatably connected;

[0007] The fixed column is connected to a descaling mechanism, which includes an internal gear. The fixed column is located above the limiting plate and is rotatably connected to the internal gear. A motor is installed on the fixed column, and an external gear is installed on the output end of the motor. The external gear and the internal gear are meshed. A fixed rod is installed on the outer wall of the internal gear, and a scraper rod is slidably connected to the fixed rod. A second spring is installed between the fixed rod and the scraper rod.

[0008] As an optimal technical scheme of the present invention, a sliding mechanism is connected to the fixed column, and the sliding mechanism includes an end block. The bottom end of the electric push rod is equipped with an end block, and a plurality of sliding blocks are slidably connected to the end block and the fixed column. The pulley is rotatably connected to the sliding block, and the end block and the fixed column are slidably connected with push blocks, and the push blocks and the sliding blocks are in contact with each other. The end of the push block and the sliding block that are in contact with each other is in the shape of an inclined surface. A second pull rod is installed at the top of the control ring, and the second pull rod is slidably connected to the fixed column. The top of the second pull rod is installed on the push block inside the fixed column, and a first pull rod is installed on the limit plate. The first pull rod is slidably connected to the control ring and the end block, and the bottom end of the first pull rod is fixed to the push block inside the end block, so that it is convenient to contact with the inner wall of the oil well pipe through the pulley, thereby limiting the rotation of the fixed column and the end block so that they can only slide up and down.

[0009] As a preferred technical solution of the utility model, a first spring is installed between the sliding block, the end block and the fixed column respectively, so as to facilitate the sliding block to pull the pulley to reset.

[0010] As a preferred technical solution of the utility model, the upper and lower ends of the scraper blade are provided with sliding grooves, a pair of the sliding grooves are arranged in a staggered manner, and two adjacent scrapers are slidably matched through the sliding grooves, thereby facilitating the sliding of the two adjacent scrapers relative to each other.

[0011] As a preferred technical solution of the utility model, the scraper blade is fan-shaped, and a plurality of the scraper blades are arranged in a ring shape, so as to facilitate the expansion and contraction of the scraper blade.

[0012] As a preferred technical solution of the utility model, the scraper rod is in a "Y"-shaped structure, so as to facilitate scraping off the dirt on the inner wall of the oil well pipe.

[0013] As a preferred technical solution of the utility model, a mounting block is installed on the top of the fixing column, and the mounting block is in the shape of an inverted cylindrical step, which is convenient for the installation of the fixing column.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model provides a sliding block, a pulley and a scraper, and sends the fixed column to the bottom end of the wax removal section of the oil well pipe. The electric push rod is started, the electric push rod is contracted, the sliding block slides outward, the pulley and the inside of the oil well pipe are in conflict, so that the fixed column and the end block slide inside the oil well pipe and limit their rotation. The slider pushes the scraper to slide outward to make it contact with the inner wall of the oil well pipe. When the fixed column is pulled upward by the mounting block, the scraper can scrape the oil wax on the inner wall of the oil well pipe and push it to move upward, so as to facilitate discharge from the top of the oil well pipe. The unfolded scraper can effectively avoid pushing the oil wax inside the oil well pipe to the bottom of the oil well pipe when it descends to the inside of the oil well pipe.

[0016] 2. The utility model is provided with a motor and a scraper rod. When the fixed column and the end block move upward to scrape the wax, the motor is started, the motor drives the outer gear to rotate, thereby driving the inner gear to rotate, and the scraper rod contacts the inner wall of the oil well pipe. When the scraper rod rotates, it can effectively scrape off the dirt firmly adhering to the inner wall of the oil well pipe, and then under the action of the scraper blade, the dirt and the oil wax are pushed out of the oil well pipe together, so that the oil well pipe can be cleaned more thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the control rod part of the utility model;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the control ring part of the utility model;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the fixed column part of the utility model;

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the end block part of the utility model;

[0022] Figure 6 It is a schematic diagram of the cross-sectional structure of the second spring part of the utility model;

[0023] Figure 7It is a schematic diagram of the cross-sectional structure of the scraper part of the utility model.

[0024] In the figure: 1. fixed column; 2. scraping mechanism; 21. scraper; 22. slide groove; 23. limit plate; 24. slider; 25. support rod; 26. control rod; 27. control ring; 28. electric push rod; 3. sliding mechanism; 31. pulley; 32. sliding block; 33. end block; 34. first pull rod; 35. second pull rod; 36. push block; 37. first spring; 4. descaling mechanism; 41. fixed rod; 42. scraper rod; 43. internal gear; 44. external gear; 45. motor; 46. second spring; 5. mounting block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-7 The utility model provides a technical solution for an oil well wax and scale removal device: Embodiment 1:

[0027] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, an oil well wax and scale removal device comprises a fixed column 1 and a pulley 31, the outer wall of the fixed column 1 is connected to the pulley 31, the fixed column 1 is connected to a scraping mechanism 2, the scraping mechanism 2 comprises a limiting plate 23, a pair of limiting plates 23 are installed on the fixed column 1, a plurality of pairs of scrapers 21 are slidably connected between the pair of limiting plates 23, the upper and lower ends of the scrapers 21 are provided with a slide groove 22, the pair of slide grooves 22 are staggered, and two adjacent scrapers 21 are slidably matched through the slide grooves 22, so that the scrapers 21 are convenient to extend into the interior of the oil well pipe and then unfold, and the scrapers 21 are fan-shaped, with multiple pairs of scrapers 21 being connected to the fixed column 1. The scrapers 21 are arranged in a ring shape, which is convenient for the scrapers 21 to slide between each other. A slider 24 is installed at the bottom end of the scraper 21. The scraper 21 is slidably connected to the limit plate 23 through the slider 24. A control rod 26 is rotatably connected to the slider 24. A support rod 25 is installed at the bottom end of the limit plate 23. The control rod 26 and the support rod 25 are slidably connected. The fixed column 1 is equipped with an electric push rod 28. The output end of the electric push rod 28 is installed on the fixed column 1. A control ring 27 is installed on the electric push rod 28. The control rod 26 and the control ring 27 are rotatably connected, so as to facilitate the control of the scraper 21 to unfold;

[0028] The fixed column 1 is connected with a sliding mechanism 3, which includes an end block 33. The bottom end of the electric push rod 28 is installed with the end block 33. The end block 33 and the fixed column 1 are both slidably connected with a plurality of sliding blocks 32. The pulley 31 is rotatably connected to the sliding block 32. The end block 33 and the interior of the fixed column 1 are both slidably connected with a push block 36. The push block 36 and the sliding block 32 are in contact with each other. The end of the push block 36 and the sliding block 32 that are in contact with each other is in an inclined shape. A second pull rod 35 is installed at the top end of the control ring 27. The second pull rod 35 is slidably connected with the fixed column 1. The top end of the second pull rod 35 is installed on the push block 36 inside the fixed column 1. A first pull rod 34 is installed on the limit plate 23. The first pull rod 34 It is slidably connected to the control ring 27 and the end block 33. The bottom end of the first pull rod 34 is fixed on the push block 36 inside the end block 33, so that the first pull rod 34 and the second pull rod 35 are moved by the movement of the electric push rod 28, and the sliding block 32 is pushed by the push block 36 to move, so that the pulley 31 and the inner wall of the oil well pipe are in close contact, and the fixed column 1 is prevented from rotating, thereby ensuring the distance between the scraper 21 and the inner wall of the oil well pipe, which is convenient for scraping off the oil. The sliding block 32 and the end block 33 are respectively installed with a first spring 37 between the fixed column 1 to facilitate pulling the sliding block 32 to reset. The top of the fixed column 1 is installed with a mounting block 5, and the mounting block 5 is in the shape of an inverted cylindrical step, which is convenient for the installation of the fixed column 1.

[0029] When in use, the fixed column 1 is installed on the lifting device of the oil well through the mounting block 5, and the fixed column 1 is inserted into the inside of the oil well pipe from one end of the end block 33 to move to the bottom end of the dewaxing section of the oil well pipe, and the electric push rod 28 is started, and the electric push rod 28 contracts, thereby reducing the distance between the control ring 27 and the fixed column 1, and the control ring 27 pushes the second pull rod 35 to move upward, and the push block 36 inside the fixed column 1 moves upward, and the electric push rod 28 drives the end block 33 to move upward, and the end block 33 drives the sliding block 32 to slide upward. Under the limitation of the first pull rod 34, the push block 36 inside the end block 33 remains stationary, so that under the action of the inclined surface of the push block 36, the sliding block 32 slides outward, and the first spring 37 is compressed, so that the pulley 31 The control ring 27 pushes the control rod 26 when it moves upward, and the control rod 26 slides on the support rod 25, thereby pushing the scraper 21 to slide outward through the slider 24, so that it is in contact with the inner wall of the oil-well pipe, so that when the fixed column 1 is pulled upward by the mounting block 5, the scraper 21 can scrape the oil wax on the inner wall of the oil-well pipe and push it upward, so as to facilitate discharge from the top of the oil-well pipe. In the process of pushing the fixed column 1 and the end block 33 into the oil-well pipe, the electric push rod 28 is in an extended state, so that there is a certain distance between the scraper 21 and the inner wall of the oil-well pipe, thereby avoiding pushing the oil wax deeper into the oil-well pipe. Embodiment 2:

[0030] On the basis of the first embodiment, Figure 1 , Figure 2 and Figure 6 As shown, a descaling mechanism 4 is connected to the fixed column 1, and the descaling mechanism 4 includes an internal gear 43. The fixed column 1 is located above the limit plate 23 and is rotatably connected to the internal gear 43. A motor 45 is installed on the fixed column 1, and an external gear 44 is installed on the output end of the motor 45. The external gear 44 and the internal gear 43 are meshed. A fixed rod 41 is installed on the outer wall of the internal gear 43, and a scraper rod 42 is slidably connected to the fixed rod 41. A second spring 46 is installed between the fixed rod 41 and the scraper rod 42, so as to facilitate driving the scraper rod 42 to move, so as to facilitate scraping off the dirt firmly adhered to the inside of the oil well pipe. The scraper rod 42 has a "Y"-shaped structure, which can disperse the resistance to the back of the scraper rod 42, thereby ensuring that the end of the scraper rod 42 can contact the inner wall of the oil well pipe.

[0031] During specific use, when the fixed column 1 and the end block 33 move upward to scrape the wax, the motor 45 is started, the motor 45 drives the outer gear 44 to rotate, thereby driving the inner gear 43 to rotate, and the inner gear 43 drives the fixed rod 41 to rotate, and the second spring 46 pushes the scraper rod 42 to contact the inner wall of the oil well pipe. When the scraper rod 42 rotates, it can effectively scrape off the dirt firmly adhered to the inner wall of the oil well pipe, and then under the action of the scraper blade 21, it is pushed out of the oil well pipe together with the oil wax, so that the oil well pipe can be cleaned more thoroughly.

[0032] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil well wax and scale removal device, comprising a fixed column (1) and a pulley (31), wherein the outer wall of the fixed column (1) is connected to the pulley (31), and the fixed column (1) is connected to a scraping mechanism (2), characterized in that: The scraping mechanism (2) comprises a limit plate (23), a pair of limit plates (23) are mounted on the fixed column (1), a plurality of pairs of scrapers (21) are slidably connected between the pair of limit plates (23), a slider (24) is mounted at the bottom end of the scraper (21), the scraper (21) is slidably connected to the limit plate (23) through the slider (24), a control rod (26) is rotatably connected to the slider (24), a support rod (25) is mounted at the bottom end of the limit plate (23), the control rod (26) and the support rod (25) are slidably connected, the fixed column (1) is equipped with an electric push rod (28), the output end of the electric push rod (28) is mounted on the fixed column (1), a control ring (27) is mounted on the electric push rod (28), and the control rod (26) and the control ring (27) are rotatably connected; The fixed column (1) is connected to a descaling mechanism (4), the descaling mechanism (4) comprising an internal gear (43), the fixed column (1) is located above the limiting plate (23) and is rotatably connected to the internal gear (43), a motor (45) is mounted on the fixed column (1), an external gear (44) is mounted on the output end of the motor (45), the external gear (44) and the internal gear (43) are meshed, a fixed rod (41) is mounted on the outer wall of the internal gear (43), a scraper rod (42) is slidably connected to the fixed rod (41), and a second spring (46) is mounted between the fixed rod (41) and the scraper rod (42).

2. The oil well wax and scale removal device according to claim 1, characterized in that: The fixed column (1) is connected to a sliding mechanism (3), the sliding mechanism (3) comprising an end block (33), the bottom end of the electric push rod (28) is mounted with the end block (33), the end block (33) and the fixed column (1) are both slidably connected to a plurality of sliding blocks (32), the pulley (31) is rotatably connected to the sliding blocks (32), the end block (33) and the fixed column (1) are both slidably connected to push blocks (36), the push blocks (36) and the sliding blocks (32) are in contact with each other, and the push blocks (36) and the sliding blocks The end of the control ring (27) that abuts against the end thereof is in the shape of an inclined plane. A second pull rod (35) is installed at the top end of the control ring (27). The second pull rod (35) is slidably connected to the fixed column (1). The top end of the second pull rod (35) is installed on a push block (36) inside the fixed column (1). A first pull rod (34) is installed on the limit plate (23). The first pull rod (34) is slidably connected to the control ring (27) and the end block (33). The bottom end of the first pull rod (34) is fixed on the push block (36) inside the end block (33).

3. The oil well wax and scale removal device according to claim 2, characterized in that: A first spring (37) is installed between the sliding block (32), the end block (33) and the fixed column (1).

4. The oil well wax and scale removal device according to claim 1, characterized in that: The scraper blades (21) are provided with sliding grooves (22) at both upper and lower ends, and a pair of the sliding grooves (22) are arranged in a staggered manner, so that two adjacent scraper blades (21) are slidably matched through the sliding grooves (22).

5. The oil well wax and scale removal device according to claim 1, characterized in that: The scraper blade (21) is fan-shaped, and a plurality of the scrapers (21) are arranged in a ring shape.

6. The oil well wax and scale removal device according to claim 1, characterized in that: The scraper rod (42) has a "Y"-shaped structure.

7. The oil well wax and scale removal device according to claim 1, characterized in that: A mounting block (5) is mounted on the top end of the fixing column (1), and the mounting block (5) is in the shape of an inverted cylindrical step.

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