Wax removal device

Abstract

The invention particularly relates to a wax removal device, and belongs to the technical field of wax removal equipment. The wax removal device comprises a sleeve body and a limiting part, the sleeve body is arranged outside the circumferential wall of the sucker rod in a sleeving mode, a plurality of spiral parts are arranged on the outer circumferential wall of the sleeve body in the circumferential direction of the sleeve body, and the spiral parts are configured in the mode that when the sucker rod moves in a pipeline, oil liquid is matched with the spiral parts so that the spiral parts can rotate. The limiting part is arranged on the sucker rod and used for limiting the distance of the sleeve body moving in the axial direction of the sucker rod. The sleeve body is arranged on the sucker rod in a sleeving mode, and when the sucker rod moves in the axial direction in a reciprocating mode, relative movement is generated between the sleeve body and the sucker rod, so that accumulated wax on the surface of the sucker rod can be scraped off through the sleeve body. The spiral part is arranged on the peripheral wall of the sleeve body, so that when the sleeve body moves in a pipeline, the sleeve body can rotate relative to the sucker rod under the pushing of oil liquid, the inner wall of the pipeline can be scraped by the outer wall of the spiral part, and the purpose of removing accumulated wax on the inner wall of the pipeline is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of wax removal equipment, and particularly relates to a wax removal device. Background Art

[0002] In the oil field, using a pumping unit to extract oil from the well is a common way to extract oil. The structure of the pumping unit generally includes a crank-connecting rod mechanism, a donkey head, a sucker rod and a plunger. The crank-connecting rod mechanism drives the donkey head to move, and then the donkey head drives the sucker rod to move. The plunger is connected to the plunger, and the plunger moves back and forth up and down in the pipeline to achieve the purpose of pumping oil.

[0003] Wax is a common component in crude oil. During the extraction process, wax may adhere to the inner walls of pipelines and the outer walls of sucker rods, causing wax accumulation. This accumulation reduces the inner diameter of the pipeline, increasing oil flow resistance and, consequently, reducing oil production. It also increases the load on the pumping unit, causing problems such as pump jamming and sucker rod breakage. Therefore, the removal of wax from sucker rods and pipeline inner walls is a pressing technical issue. Summary of the Invention

[0004] The object of the present invention is to provide a wax removal device, which can remove wax deposits on sucker rods and pipelines.

[0005] To achieve the aforementioned objectives, the present invention employs the following technical solution: The embodiments of the present application provide a wax removal device comprising a sleeve and a stopper. The sleeve is fitted over the circumferential wall of the sucker rod and surrounds the circumference of the sleeve. The sleeve's outer circumferential wall is provided with multiple spirals, which are configured so that when the sucker rod moves within the pipeline, the oil interacts with the spirals to cause them to rotate. The stopper is provided on the sucker rod to limit the distance the sleeve can move axially along the sucker rod.

[0006] In some embodiments, the sleeve includes a first section and a second section, and the first section and the second section are detachably connected.

[0007] In some embodiments, the spiral portion is provided with a recessed portion, and the recessed portion is provided with a scraping component, and the scraping component is used to scrape the inner wall of the pipe.

[0008] In some embodiments, the scraping component is rotatably connected to the recessed portion, the rotation axis of the scraping component is parallel to the axis of the sleeve, and a fan blade is rotatably provided on one side of the spiral portion along the axial direction of the sleeve. The fan blade is connected to the scraping component to drive the scraping component to rotate.

[0009] In some embodiments, the scraping component includes a barrel and a scraping blade. The barrel is axially parallel to the sleeve, a first through-hole is defined in a peripheral wall of the barrel, and the fan blade is connected to the barrel. The scraping blade is connected to the barrel and extends outside the barrel through the first through-hole, and is used to scrape the inner wall of the pipe.

[0010] In some embodiments, along the axial direction of the sleeve, the recessed portion includes a first wall, the first wall is provided with a second through hole, the fan blade is provided with a rotating shaft, the rotating shaft passes through the second through hole, and the rotating shaft is connected to the cylinder.

[0011] In some embodiments, a wax accumulation chamber is provided in the cylinder, the peripheral wall of the wax accumulation chamber is cylindrical, the axis of the peripheral wall of the wax accumulation chamber is parallel to the axis of the sleeve, and the peripheral wall of the wax accumulation chamber is provided with multiple third through holes, and the scraper is pressed against the peripheral wall of the wax accumulation chamber along the tangent direction of the peripheral wall of the wax accumulation chamber.

[0012] In some embodiments, a circular arc protrusion is provided on a side of the scraping plate close to the wax accumulation chamber, and the circular arc protrusion abuts against the side wall of the wax accumulation chamber.

[0013] In some embodiments, along the axial direction of the wax accumulation cavity, the length of the third through hole is greater than or equal to the length of the arc protrusion, and the width of the third through hole is less than the diameter of the arc protrusion.

[0014] In some embodiments, along the axial direction of the sleeve, the recessed portion includes a second wall, the first wall and the second wall are arranged opposite to each other, the second wall is provided with a fourth through hole, and the wax accumulation cavity is passed through the fourth through hole.

[0015] The present invention has the following beneficial effects:

[0016] 1. The sleeve is mounted on the sucker rod. When the sucker rod moves axially back and forth, relative movement occurs between the sleeve and the sucker rod, so that the wax accumulated on the surface of the sucker rod can be scraped off through the sleeve.

[0017] 2. The outer wall of the sleeve is provided with a spiral portion. Therefore, when the sleeve moves in the pipeline, the sleeve can rotate relative to the sucker rod under the push of the oil, so that the outer wall of the spiral portion can scrape the inner wall of the pipeline, thereby achieving the purpose of removing wax accumulated on the inner wall of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the wax removal device and the sucker rod in cooperation with each other;

[0019] Figure 2 It is a structural schematic diagram of the wax removal device of the present invention;

[0020] Figure 3 Schematic diagram of the top view of the wax removal device of the present invention;

[0021] Figure 4 AA is a schematic cross-sectional view of the wax removal device of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the scraping component of the present invention;

[0023] Figure 6 It is a schematic structural diagram of the scraping component of the present invention.

[0024] Figure numbers: 1- sucker rod, 2- sleeve, 3- limiting portion, 4- first subsection, 5- second subsection, 6- scraping component, 7- fan blade, 8- recessed portion, 9- spiral portion, 10- rotating shaft, 11- cylinder, 12- wax accumulation chamber, 13- scraping sheet, 14- blocking cover, 15- first wall, 16- second wall, 17- second through hole, 18- fourth through hole, 19- sealing portion, 20- first through hole, 21- limiting groove, 22- third through hole. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0026] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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.

[0027] The present embodiment provides a wax removal device comprising a sleeve 2 and a stopper 3. The sleeve 2 is mounted on the outer wall of a sucker rod 1. The sleeve 2 is provided with a plurality of spiral portions 9 around the circumference of the sleeve 2. The spiral portions 9 are configured so that when the sucker rod 1 moves within the pipeline, the oil interacts with the spiral portions 9 to cause the spiral portions 9 to rotate. The stopper 3 is provided on the sucker rod 1 to limit the distance that the sleeve 2 can move axially along the sucker rod 1.

[0028] The sleeve 2 is sleeved on the sucker rod 1. When the sucker rod 1 moves axially back and forth, relative movement occurs between the sleeve 2 and the sucker rod 1, so that the wax accumulated on the surface of the sucker rod 1 can be scraped off through the sleeve 2.

[0029] The diameter of the end of a common sucker rod 1 gradually increases, so the limit portion 3 is used to limit the axial movement of the sleeve 2 along the sucker rod 1, reducing the risk of the sleeve 2 being stuck at the end of the sucker rod 1.

[0030] The limiting portion 3 may be mounted on the sucker rod 1 or may be formed by the sucker rod 1 itself.

[0031] The outer wall of the sleeve 2 is provided with a spiral portion 9, so when the sleeve 2 moves in the pipeline, under the push of the oil, the sleeve 2 can rotate relative to the sucker rod 1, so that the outer wall of the spiral portion 9 can scrape the inner wall of the pipeline, thereby achieving the purpose of removing wax accumulated on the inner wall of the pipeline.

[0032] The specific spiral direction of the spiral portion 9 can be set as needed. For example, when the sucker rod 1 rises, the spiral portion 9 can enable the sleeve body 2 to rotate.

[0033] In some embodiments, the casing 2 includes a first section 4 and a second section 5 , and the first section 4 and the second section 5 are detachably connected.

[0034] The first section 4 and the second section 5 are detachably connected, so as to facilitate the assembly and disassembly of the sleeve 2 to the sucker rod 1 .

[0035] The specific structure for detachably connecting the first section 4 and the second section 5 can be selected from existing structures. For example, the first section 4 and the second section 5 can be connected using bolts.

[0036] In some embodiments, the spiral portion 9 is provided with a recessed portion 8 , and the recessed portion 8 is provided with a scraping component 6 , which is used to scrape the inner wall of the pipe.

[0037] The recessed portion 8 is used to provide installation space for the scraping component 6, so that the scraping component 6 can be mostly accommodated in the recessed portion 8, reducing the risk of the scraping component 6 protruding excessively from the spiral portion 9, resulting in the sleeve 2 being unable to move axially along the pipeline.

[0038] When the scraping component 6 is installed in the recessed portion 8, the scraping component 6 is partially arranged outside the recessed portion 8, so that when the spiral portion 9 rotates, the scraping component 6 can contact the inner wall of the pipe to scrape the pipe, thereby improving the wax removal effect on the inner wall of the pipe.

[0039] In some embodiments, the scraping component 6 is rotatably connected to the recessed portion 8, the center of the rotating axis 10 of the scraping component 6 is parallel to the axis of the sleeve 2, and a fan blade 7 is rotatably provided on one side of the spiral portion 9 along the axial direction of the sleeve 2. The fan blade 7 is connected to the scraping component 6 to drive the scraping component 6 to rotate.

[0040] The rotation direction of the scraping component 6 can be the same as the rotation direction of the sleeve body 2.

[0041] The scraping member 6 is rotatably connected to the recessed portion 8. When the scraping member 6 rotates, the relative speed between the scraping member 6 and the inner wall of the pipe is increased, thereby improving the wax scraping effect on the inner wall of the pipe.

[0042] The fan blade 7 is used to drive the scraping member 6 to rotate. The location of the fan blade 7 and the specific parameters of the blades of the fan blade 7 can be selected as needed to meet the requirement that the fan blade 7 can be driven to rotate by the oil when the sleeve 2 moves.

[0043] The scraping component 6 is driven to rotate by the fan blades 7, so that the scraping component 6 does not need to be provided with a power structure, and the kinetic energy of the sucker rod 1 is fully utilized, so that the scraping component 6 can work stably for a long time.

[0044] In some embodiments, the scraping member 6 includes a barrel 11 and a scraping blade 13. The axial direction of the barrel 11 is parallel to the axial direction of the housing 2. A first through hole 20 is provided on the circumferential wall of the barrel 11, and the blade 7 is connected to the barrel 11. The scraping blade 13 is connected to the barrel 11 and extends out of the barrel 11 through the first through hole 20. The scraping blade 13 is used to scrape the inner wall of the pipe.

[0045] The hollow structure of the cylinder 11 reduces the resistance of the fan blades 7 to drive the scraping component 6 to rotate.

[0046] The scraping piece 13 is partially disposed outside the cylinder 11 through the first through hole 20 on the peripheral wall of the cylinder 11 , so that when the cylinder 11 rotates, the scraping piece 13 can scrape the inner wall of the pipe.

[0047] In this embodiment, driving the scraping component 6 to rotate by the fan blade 7 can also protect the scraping component 6. For example, if the wax accumulation is thick, when the scraping piece 13 is stuck inside the wax accumulation and cannot cut the wax accumulation, the sleeve 2 can continue to rotate. When the sleeve 2 rotates and the scraping piece 13 is stuck, the cylinder 11 rotates in the opposite direction relative to the sleeve 2, and the scraping piece 13 can lift the wax accumulation so that the wax accumulation can be removed. At the same time, the cylinder 11 rotates in the opposite direction relative to the sleeve 2, reducing the risk of the sleeve 2 being stuck.

[0048] The cylinder 11 may include an end near the fan blade 7, the first end of which is an open structure, the first through hole 20 may extend to the first end of the cylinder 11, so that the first through hole 20 has an opening at the first end, and a limiting groove 21 may be provided in the cylinder 11, and the limiting groove 21 extends along the axial direction of the cylinder 11. This configuration allows the scraper 13 to be inserted into the first through hole 20 from the first end of the cylinder 11. At the same time, the scraper 13 is inserted into the limiting groove 21, so that the scraper 13 can be detachably connected to the cylinder 11. The first end of the cylinder 11 may be provided with a blocking cover 14. When the blocking cover 14 is connected to the first end, the blocking cover 14 can abut against the side of the scraper 13 near the first end, so that the scraper 13 can be fixed.

[0049] The specific connection structure between the blocking cover 14 and the cylinder 11 can be selected from existing structures and will not be described here in detail.

[0050] In some embodiments, along the axial direction of the sleeve 2, the recessed portion 8 includes a first wall 15, the first wall 15 is provided with a second through hole 17, the fan blade 7 is provided with a rotating shaft 10, the rotating shaft 10 is passed through the second through hole 17, and the rotating shaft 10 is connected to the cylinder 11.

[0051] The rotating shaft 10 can be threadedly connected to the cylinder 11 after passing through the second through hole 17. In the embodiment where the cylinder 11 is provided with a blocking cover 14, the blocking cover 14 can be provided with a threaded hole so that the rotating shaft 10 can be threadedly connected to the blocking cover 14.

[0052] At this time, by reasonably setting the blade structure of the fan blade 7, the rotation direction of the fan blade 7 can be made the direction of tightening the rotating shaft 10 and the cylinder 11, reducing the risk of disconnection between the rotating shaft 10 and the cylinder 11.

[0053] The rotating shaft 10 allows the fan blade 7 to be rotatably connected to the spiral portion 9, and also allows the barrel 11 to be rotatably connected to the spiral portion 9. On the other hand, the rotating shaft 10 also allows the barrel 11 to be removed from the recessed portion 8. Specifically, when the barrel 11 needs to be removed, the barrel 11 is first fixed, and then the rotating shaft 10 is rotated by the fan blade 7 so that the rotating shaft 10 can be gradually unscrewed from the threaded hole of the barrel 11.

[0054] In some embodiments, a wax accumulation chamber 12 is provided in the cylinder 11, the peripheral wall of the wax accumulation chamber 12 is cylindrical, the axis of the peripheral wall of the wax accumulation chamber 12 is parallel to the axis of the sleeve 2, and the peripheral wall of the wax accumulation chamber 12 is provided with multiple third through holes 22, and the scraper 13 is pressed against the peripheral wall of the wax accumulation chamber 12 along the tangent direction of the peripheral wall of the wax accumulation chamber 12.

[0055] The scraping piece 13 may be made of elastic material so that the scraping piece 13 can be tightly pressed against the peripheral wall of the wax accumulation chamber 12 .

[0056] The wax accumulation chamber 12 remains stationary during the rotation of the cylinder 11 .

[0057] The wax accumulation chamber 12 can collect the wax scraped off by the scraper blade 13. Specifically, because the scraper blade 13 abuts against the peripheral wall of the wax accumulation chamber 12 along a tangential direction of the peripheral wall of the wax accumulation chamber 12, when the scraper blade 13 rotates with the cylinder 11, the wax scraped off by the scraper blade 13 first enters the cylinder 11 through the first through hole 20, then moves toward the abutment point between the scraper blade 13 and the peripheral wall of the wax accumulation chamber 12, and is finally pushed into the wax accumulation chamber 12 by the scraper blade 13. Furthermore, when the scraper blade 13 pushes the wax into the wax accumulation chamber 12, it can squeeze the wax, thereby compressing the wax in the wax accumulation chamber 12 and increasing the wax volume that the wax accumulation chamber 12 can accommodate.

[0058] The third through hole 22 may be a structure with a smaller opening on the side close to the inside of the wax accumulation chamber 12 and a larger opening on the side close to the outside of the wax accumulation chamber 12 , thereby reducing the risk of the accumulated wax escaping from the wax accumulation chamber 12 .

[0059] In some embodiments, a circular arc protrusion is provided on a side of the scraping piece 13 close to the wax accumulation chamber 12 , and the circular arc protrusion abuts against the side wall of the wax accumulation chamber 12 .

[0060] On one hand, the arc protrusion allows the scraper 13 to slide more smoothly relative to the wax accumulation chamber 12 , and on the other hand, the arc surface of the arc protrusion facilitates guiding the accumulated wax into the third through hole 22 and then applying pressure to the accumulated wax.

[0061] In some embodiments, along the axial direction of the wax accumulation cavity 12 , the length of the third through hole 22 is greater than or equal to the length of the arc protrusion, and the width of the third through hole 22 is less than the diameter of the arc protrusion.

[0062] The advantage of such a configuration is that when the arc protrusion passes through the third through hole 22 , the arc protrusion can partially enter the third through hole 22 , so that the accumulated wax can be pushed into the wax accumulation chamber 12 more easily.

[0063] In some embodiments, along the axial direction of the sleeve body 2 , the recessed portion 8 includes a second wall 16 , the first wall 15 and the second wall 16 are arranged opposite to each other, the second wall 16 is provided with a fourth through hole 18 , and the wax accumulation cavity 12 is passed through the fourth through hole 18 .

[0064] The barrel 11 may be provided with a perforation, and the wax accumulation chamber 12 is partially provided in the barrel 11 through the fourth through hole 18 and the perforation.

[0065] On the one hand, such a configuration allows the wax accumulation chamber 12 to be removed from the spiral portion 9 for cleaning without removing the barrel 11. On the other hand, the wax accumulation chamber 12 can support the barrel 11, and the wax accumulation chamber 12 cooperates with the rotating shaft 10 to increase the rotational stability of the barrel 11.

[0066] In the embodiment of the present application, a sealing portion 19 may be detachably provided at one end of the wax accumulation chamber 12 . When the wax accumulation chamber 12 is disassembled, the sealing portion 19 may be opened to open the wax accumulation chamber 12 .

[0067] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various deformations, modifications, and substitutions made by ordinary technicians in this field to the technical solutions of the present invention should all fall within the scope of protection determined by the claims of the present invention.

Claims

1. A wax removal device, characterized in that: include: A sleeve (2) is sleeved outside the peripheral wall of the sucker rod (1), and is provided around the circumference of the sleeve (2). A plurality of spiral portions (9) are provided on the peripheral wall of the sleeve (2). The spiral portions (9) are configured so that when the sucker rod (1) moves in the pipeline, oil cooperates with the spiral portions (9) to cause the spiral portions (9) to rotate. The limiting portion (3) is provided on the sucker rod (1) and is used to limit the distance that the sleeve (2) moves axially along the sucker rod (1).

2. The wax removal device according to claim 1, characterized in that: The casing (2) comprises a first section (4) and a second section (5), wherein the first section (4) and the second section (5) are detachably connected.

3. The wax removal device according to claim 1, characterized in that: The spiral portion (9) is provided with a recessed portion (8), and the recessed portion (8) is provided with a scraping component (6), and the scraping component (6) is used to scrape the inner wall of the pipeline.

4. The wax removal device according to claim 3, characterized in that: The scraping component (6) is rotatably connected to the recessed portion (8), the center of the rotating shaft (10) of the scraping component (6) is parallel to the axis of the sleeve (2), and a fan blade (7) is rotatably provided on one side of the spiral portion (9) along the axial direction of the sleeve (2), and the fan blade (7) is connected to the scraping component (6) to drive the scraping component (6) to rotate.

5. The wax removal device according to claim 4, characterized in that: The scraping component (6) comprises: a cylinder (11), wherein the axial direction of the cylinder (11) is parallel to the axial direction of the sleeve (2), a first through hole (20) is provided on a peripheral wall of the cylinder (11), and the fan blade (7) is connected to the cylinder (11); A scraping piece (13) is connected to the cylinder (11) and extends out of the cylinder (11) through the first through hole (20). The scraping piece (13) is used for scraping the inner wall of the pipeline.

6. The wax removal device according to claim 5, characterized in that: Along the axial direction of the sleeve (2), the recessed portion (8) includes a first wall (15), the first wall (15) is provided with a second through hole (17), the fan blade (7) is provided with a rotating shaft (10), the rotating shaft (10) is passed through the second through hole (17), and the rotating shaft (10) is connected to the cylinder (11).

7. The wax removal device according to claim 5, characterized in that: A wax accumulation chamber (12) is provided in the cylinder (11), the peripheral wall of the wax accumulation chamber (12) is cylindrical, the axis of the peripheral wall of the wax accumulation chamber (12) is parallel to the axis of the sleeve (2), the peripheral wall of the wax accumulation chamber (12) is provided with a plurality of third through holes (22), and the scraper (13) abuts against the peripheral wall of the wax accumulation chamber (12) along the tangent direction of the peripheral wall of the wax accumulation chamber (12).

8. The wax removal device according to claim 7, characterized in that: A circular arc protrusion is provided on one side of the scraping piece (13) close to the wax accumulation cavity (12), and the circular arc protrusion abuts against the side wall of the wax accumulation cavity (12).

9. The wax removal device according to claim 8, characterized in that: Along the axial direction of the wax accumulation cavity (12), the length of the third through hole (22) is greater than or equal to the length of the circular arc protrusion, and the width of the third through hole (22) is less than the diameter of the circular arc protrusion.

10. The wax removal device according to claim 7, characterized in that: Along the axial direction of the sleeve (2), the recessed portion (8) includes a second wall (16), the first wall (15) and the second wall (16) are arranged opposite to each other, the second wall (16) is provided with a fourth through hole (18), and the wax accumulation cavity (12) is passed through the fourth through hole (18).

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