A jet rotary composite oil well wax scraper

Abstract

This invention relates to the field of downhole operation equipment technology, and particularly to a jet-rotary composite oil well wax scraper. The jet-rotary composite oil well wax scraper includes: a support tube, a cone head, and a wax removal device. The support tube is a hollow cylindrical structure with a wax flushing tube at the center, a cone head at the lower end, and a protective sleeve on the upper outer wall. An annular step is provided in the middle of the support tube, with a fluid supply port and an outlet port on the outer wall of the step. A motor support is provided on the annular step, and several hydraulic motor assemblies communicating with the inner wall of the support tube are arranged circumferentially. A rotating sleeve is provided on the outer wall of the support tube, and two sets of symmetrical wax removal devices are provided on the rotating sleeve. A gear structure meshing with the hydraulic motor assemblies is provided on the inner wall of the rotating sleeve. The cone head consists of a hollow cylinder and a frustum, with a sealing cap at the upper end of the frustum and a distance sensor at the lower end. The scraper and the jet block are used in combination; the scraper physically removes the wax, and the jet block dissolves residual wax with a cleaning fluid, improving the wax scraping efficiency and effect, and extending the service life of the oil well.

Description

Technical Field

[0001] This invention relates to the field of downhole operation engineering equipment technology, and in particular to a jet-rotary composite oil well wax scraper. Background Technology

[0002] During oilfield development, light crude oil is usually extracted first. As development progresses, the content of gum and asphalt in the crude oil will continue to increase. This not only increases the difficulty of extraction but also brings many challenges to daily maintenance. These changes are mainly due to the differences in burial depth, production volume, and water cut of different oil reservoirs, as well as the influence of factors such as crude oil wax content and extraction period. As a result, oilfield wells exhibit different waxing patterns and wellbore waxing points at different stages.

[0003] Traditional hot washing methods often fail to completely solve the problem of wax buildup in oil wells, causing paraffin wax to accumulate in the wellbore over a long period of time and gradually form hard wax blocks. The presence of these wax blocks makes it extremely difficult to run tubing during oil well maintenance operations, which seriously affects the normal production and maintenance efficiency of the oil field.

[0004] Currently, a widely used method is to use a wax scraper. Existing wax scrapers are designed with an outer diameter smaller than the inner diameter of the casing. This allows for effective scraping of the wax on the casing wall through mechanical scraping and backwashing circulation. However, this method also has certain limitations. Due to the relatively small outer diameter of the wax scraper, for sections of the wellbore where hardened wax has formed, the scraping effect using only traditional mechanical dewaxing methods may not be ideal, resulting in low efficiency in removing oil and wax from the inside of the well and long operation cycles. Summary of the Invention

[0005] (a) Technical problems to be solved This invention provides a jet-rotary composite oil well wax scraper to overcome the problems of existing technologies that only use mechanical methods to remove wax from the wellbore, resulting in long working cycles and low efficiency.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides a jet-rotary composite oil well wax scraper, characterized in that it comprises: a support pipe, a cone head, and two wax removal devices; The bearing tube is a hollow cylindrical structure with a wax flushing tube at the center. An annular liquid channel is provided between the wax flushing tube and the bearing tube. A cone is provided at the lower end of the bearing tube, and a protective sleeve is fitted on the outer wall of the upper end of the bearing tube. The middle part of the bearing tube is provided with an annular step on the outer edge, and the outer wall of the annular step is provided with a number of liquid supply ports and a number of liquid outlet ports. A motor support is provided on the annular step, and several hydraulic motor assemblies are arranged circumferentially on the motor support. The hydraulic motor assemblies are connected to the inner wall of the bearing pipe. The outer wall of the bearing tube is provided with a rotating sleeve, which is located at the lower end of the protective sleeve. The rotating sleeve is provided with two dewaxing devices, which are symmetrically arranged on the upper and lower sides of the rotating sleeve. The dewaxing device includes: several scrapers and several spray blocks; The rotating sleeve is a hollow cylindrical structure, and a gear structure is machined on the inner wall of the upper end of the rotating sleeve. The gear structure meshes with the hydraulic motor assembly. The cone head consists of two parts: a hollow cylindrical structure at the upper end and a hollow frustum structure at the lower end. The upper end of the hollow frustum structure has an inwardly extending step, and a sealing cover is provided at the upper end of the step. A distance sensor is provided at the lower end of the sealing cover. The distance sensor is located inside the hollow frustum structure, and the sealing cover limits the movement of the distance sensor.

[0007] Preferably, the lower end of the bearing tube has a threaded inner wall, and the lower end of the bearing tube is threadedly connected to a cone.

[0008] Preferably, the outer wall of the upper end of the bearing tube is provided with a tapered thread, the protective sleeve is a hollow frustum structure, the inner wall of the protective sleeve is provided with a thread that matches the tapered thread on the outer wall of the bearing tube, and the bearing tube and the protective sleeve are threadedly connected.

[0009] Preferably, the hydraulic motor assembly includes: a hydraulic motor, a pinion, and a metal conduit; The hydraulic motor is fixedly connected to the motor support by bolts. The output shaft of the hydraulic motor is connected to a small gear. The power input end of the hydraulic motor is provided with a metal conduit. One end of the metal conduit is connected to the hydraulic motor and the other end is embedded in the bearing tube. The small gear meshes with a gear structure provided on the inner wall of the upper end of the rotating sleeve.

[0010] Preferably, the plurality of scrapers and the plurality of spray blocks are arranged circumferentially and evenly on the outer wall of the rotating sleeve.

[0011] Preferably, the scraper has a T-shaped structure, with the left end of the scraper embedded in the rotating sleeve and the right end of the scraper processed into a triangular structure, which is beneficial for quickly scraping off oil and wax; The spray block has a rectangular structure and several through holes are evenly arranged vertically on it. The spray block is fixedly connected to the rotating sleeve.

[0012] Preferably, the plurality of liquid supply ports are divided into two groups and are evenly arranged circumferentially on the outer wall of the annular step. The two groups of liquid supply ports are symmetrically arranged and are respectively connected to the inner wall of the dewaxing device.

[0013] Preferably, the plurality of liquid outlets are evenly and circumferentially arranged on the outer wall of the annular step, and the liquid outlets are located on the symmetrical line of the two sets of liquid supply ports.

[0014] Preferably, the outer wall of the hollow cylindrical structure at the upper end of the cone head is uniformly provided with a plurality of rectangular through holes, which are connected to the wax flushing tube.

[0015] Preferably, a lower support ring is provided between the cone head and the rotating sleeve, and the lower support ring is integrally formed with the cone head; A lower sealing ring is provided between the lower support ring and the rotating sleeve.

[0016] Preferably, an upper sealing ring is provided between the protective sleeve and the rotating sleeve, and an inner sealing ring is provided between the rotating sleeve and the bearing tube.

[0017] (III) Beneficial Effects This invention provides a jet-rotary composite oil well wax scraper. Several scrapers from a wax removal device, driven by a rotating sleeve, effectively remove wax deposits from the inner wall of the oil well. The wax removal device also includes several jetting blocks that spray cleaning fluid simultaneously with the scraping process, further dissolving and flushing away the scraped wax, ensuring the cleanliness of the oil well's inner wall. A hydraulic motor assembly meshes with a gear structure on the rotating sleeve, enabling the sleeve to rotate under the drive of the hydraulic motor. This design not only provides powerful driving force but also ensures smooth and continuous rotation. The cone head is equipped with a distance sensor that can monitor the diving depth in real time, which helps to locate the wax. The upper outer wall of the support tube is covered with a protective sleeve. This design can effectively protect the structure of the rotating sleeve in the wax scraper and prevent it from being damaged during use. The combination of the scraper and the spray block makes the wax scraper perform well in both scraping and cleaning. The scraper is responsible for physically removing the wax, while the spray block further dissolves the residual wax with chemical cleaning fluid and hot washing fluid. The combination of the two greatly improves the efficiency and effect of wax scraping, thereby achieving the goal of improving the production efficiency and service life of the oil well. Attached Figure Description

[0018] Figure 1 This diagram illustrates the structure of a jet-rotation composite oil well wax scraper according to the present invention. Figure 2 This diagram shows a cross-sectional view of a jet-rotation composite oil well wax scraper according to the present invention. Figure 3 This diagram shows a top view of the structure of a jet-rotation composite oil well wax scraper according to the present invention. Figure 4 Show Figure 2 A schematic diagram of a partial structure of A in the middle.

[0019] The components are: 1: bearing tube; 2: hydraulic motor; 3: scraper; 4: rotating sleeve; 5: wax flushing tube; 6: cone head; 7: lower sealing ring; 8: spray block; 9: upper sealing ring; 10: motor support; 11: protective sleeve; 12: lower support ring; 13: pinion; 14: inner sealing ring; 15: sealing cover; 16: distance sensor. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "inner," "outer," "top," and "bottom" are based on the orientations or positional relationships shown in the accompanying drawings. They are intended only to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the components referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figure 1-4 As shown, the present invention provides a jet-rotation composite oil well wax scraper, comprising: a carrier pipe 1, a cone head 6, and two wax removal devices; The support pipe 1 is the main support component of the device. The support pipe 1 adopts a hollow cylindrical structure design. The middle part of the support pipe 1 has an outer ring step. The upper end of the ring step is provided with a motor support 10. The motor support 10 has a ring structure. The upper end face of the motor support 10 has several through holes in the circumference. These through holes are used to connect the hydraulic motor assembly. The motor support 10 is fixedly connected to the ring step by several bolts to ensure the stability and firmness of the structure.

[0023] The motor support 10 is circumferentially equipped with several hydraulic motor assemblies. In actual operation, there are usually four hydraulic motor assemblies to achieve efficient wax scraping. The four hydraulic motor assemblies are fixedly connected to the motor support 10 by bolts to ensure the stability of the assemblies.

[0024] The hydraulic motor assembly includes a hydraulic motor 2, a pinion 13, and a metal conduit. The hydraulic motor 2 is the core component of the drive system of the wax scraper, responsible for providing rotational power. The hydraulic motor 2 is fixedly connected to the motor support 10 by bolts. The output shaft of the hydraulic motor 2 is embedded in the through hole on the motor support 10. The lower end of the output shaft is connected to the pinion 13. The power input end of the hydraulic motor 2 is provided with a metal conduit. One end of the metal conduit is connected to the hydraulic motor 2, and the other end is embedded in the carrier pipe 1. The metal conduit provides the hydraulic motor 2 with the required power fluid.

[0025] The upper outer wall of the bearing pipe 1 is fitted with a protective sleeve 11. The upper outer wall of the bearing pipe 1 is provided with a tapered thread. The protective sleeve 11 is a hollow frustum structure. The inner wall of the protective sleeve 11 is provided with a thread that matches the tapered thread on the outer wall of the bearing pipe 1, so that the bearing pipe 1 and the protective sleeve 11 can be connected together by threads. The main function of the protective sleeve 11 is to protect the hydraulic motor assembly from the influence of the external environment.

[0026] The outer wall of the bearing pipe 1 is provided with a rotating sleeve 4, which is located at the lower end of the protective sleeve 11. An upper sealing ring 9 is provided between the protective sleeve 11 and the rotating sleeve 4. The function of the upper sealing ring 9 is to prevent external impurities and liquids from entering the interior of the rotating sleeve 4 and the protective sleeve 11, thereby protecting the internal components from contamination and damage. An inner sealing ring 14 is provided between the rotating sleeve 4 and the bearing pipe 1. The inner sealing ring 14 prevents the liquid between the rotating sleeve 4 and the bearing pipe 1 from flowing out. The rotating sleeve 4 is a hollow cylindrical structure. A gear structure is machined on the inner wall of the upper end of the rotating sleeve 4. The gear structure meshes with the pinion 13 of the four hydraulic motor assemblies. Through this gear transmission method, the rotational power of the hydraulic motor 2 can be effectively transmitted to the rotating sleeve 4, enabling it to rotate at high speed.

[0027] The rotating sleeve 4 is equipped with two sets of wax removal devices, which are symmetrically arranged on the upper and lower sides of the rotating sleeve 4. This symmetrical arrangement not only improves the working efficiency of the wax scraper, but also ensures that it maintains balance during operation, reducing unnecessary vibration and wear.

[0028] The dewaxing device comprises several scrapers 3 and several spray blocks 8. The scrapers 3 and spray blocks 8 are evenly and alternately arranged on the outer wall of the rotating sleeve 4. The scrapers 3 have a T-shaped structure, with the left end of the scraper 3 embedded in the rotating sleeve 4 and the right end of the scraper 3 machined into a triangular structure. This triangular structure helps to quickly scrape away wax deposits in the oil well and improves the wax scraping efficiency. At the same time, the T-shaped structure ensures that the scraper 3 remains stable and does not easily fall off during rotation. The spray blocks 8 have a rectangular structure and several vertically evenly arranged through holes. The function of these through holes is to spray high-pressure liquid during the wax scraping process to assist the scrapers 3 in the wax removal operation. The spray blocks 8 are fixedly connected to the rotating sleeve 4 to ensure its stability during operation.

[0029] The outer wall of the annular step of the bearing pipe 1 is provided with several liquid supply ports and several liquid outlet ports. The liquid supply ports are divided into two groups and are evenly arranged circumferentially on the outer wall of the annular step. The two groups of liquid supply ports are symmetrically arranged and are respectively connected to the inner wall of the dewaxing device. The number of liquid supply ports matches the number of spray blocks 8. The liquid supply ports are used to supply liquid to the spray blocks 8 to ensure that each spray block 8 can obtain sufficient high-pressure liquid supply, so as to achieve the best dewaxing effect during the wax scraping process. When the wax scraper is working, the high-pressure liquid enters the spray block 8 through the liquid supply port and is sprayed out from the through hole on the spray block 8 to form a high-pressure liquid flow. These high-pressure liquid flows can not only assist the scraper 3 in performing the dewaxing operation, but also soften and wash away the wax, making it easier to scrape off. The several liquid outlets are evenly and circumferentially arranged on the outer wall of the annular step. The liquid outlet is located on the symmetrical line between the two sets of liquid supply ports. The liquid outlet is used for high-volume flushing so that the liquid can flow out smoothly and flush away the oil and wax in the oil well.

[0030] The bearing pipe 1 has a wax flushing pipe 5 at its center, and an annular liquid channel is provided between the wax flushing pipe 5 and the bearing pipe 1. The lower end of the bearing pipe 1 has a cone head 6, which is composed of two parts: a hollow cylindrical structure at the upper end and a hollow frustum structure at the lower end. The outer wall of the upper end of the hollow cylindrical structure is threaded, which is used to connect with the bearing pipe 1. The outer wall of the hollow cylindrical structure at the upper end of the cone head 6 is uniformly provided with several rectangular through holes around its circumference. These rectangular through holes are connected to the wax flushing pipe 5 to realize the wax flushing function. When the high-pressure liquid enters the cone head 6 through the wax flushing pipe 5, it can be sprayed out through these rectangular through holes to flush the scraped oil wax out of the oil well to the surface.

[0031] The lower end of the cone head 6 is machined with a tapered bevel. This design helps reduce resistance when the cone head 6 moves downward, allowing it to enter the oil well more smoothly. The upper end of the cone head 6 has a hollow cylindrical structure with threads machined on its outer wall. These threads can be used to connect the cone head 6 to the wax flushing pipe 5, ensuring a firm connection and seal between the two.

[0032] The hollow truncated cone structure has an inwardly extending step at its upper end, and a sealing cover 15 at the upper end of the step. The sealing cover 15 is fixedly connected to the cone head 6 by bolts to ensure its stability during operation. A distance sensor 16 is located at the lower end of the sealing cover 15. The distance sensor 16 is located inside the hollow truncated cone structure. The sealing cover 15 limits and protects the distance sensor 16. The main function of the distance sensor 16 is to measure the diving depth of the wax scraper in the oil well, thereby helping the operator to accurately locate the wax position and improve the wax scraping efficiency.

[0033] A lower support ring 12 is directly provided between the cone head 6 and the rotating sleeve 4. The lower support ring 12 is integral with the cone head 6. A lower sealing ring 7 is provided between the lower support ring 12 and the rotating sleeve 4. The function of the lower sealing ring 7 is to prevent external impurities and liquids from entering the interior of the rotating sleeve 4, thereby protecting the internal components from contamination and damage.

[0034] In actual operation, this jet-rotary composite oil well wax scraper includes the following steps: Step S1: The jet-rotary composite oil well scraper is lowered into the well through the well tubing. During the insertion process, the depth of the scraper is monitored in real time by the distance sensor 16 and the data is transmitted to the surface control system to help the operator accurately locate the position of the oil wax. Step S2: After reaching the position where the oil and wax removal operation needs to be performed, liquid is injected through the annular liquid space between the bearing pipe 1 and the wax flushing pipe 5 to start the hydraulic motor 2. The output shaft of the hydraulic motor 2 drives the pinion 13 to rotate. The pinion 13 meshes with the gear structure on the inner wall of the upper end of the rotating sleeve 4, thereby transmitting the rotational power to the rotating sleeve 4. In step S3, the rotating sleeve 4 rotates at high speed under the drive of the hydraulic motor 2, which drives the scraper 3 and the spray block 8 on its outer wall to rotate synchronously. The triangular structure of the scraper 3 scrapes away the wax deposits on the inner wall of the oil well during the rotation process, and the through hole on the spray block 8 sprays out high-pressure liquid to assist the scraper 3 in dewaxing. Step S4: While driving the wax scraping operation, the remaining liquid is discharged from the outlet, flushing the scraped wax deposits into the well. Step S5: After the wax scraper completes the wax scraping task in the predetermined area, the operator stops injecting liquid into the annular liquid space between the carrier pipe 1 and the flushing pipe 5, and injects a large volume of liquid into the flushing pipe 5. The high-pressure liquid enters the cone head 6 through the flushing pipe 5 and is ejected through the rectangular through hole on the outer wall of the hollow cylindrical structure at the upper end of the cone head 6, flushing the scraped oil and wax out of the oil well to the surface.

[0035] It is understood that the various embodiments mentioned above in this invention can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this invention will not elaborate further.

[0036] Those skilled in the art will understand that, in the above-described method of the specific implementation, the order in which each step is written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0037] This invention provides a jet-rotary composite oil well wax scraper. The wax removal device is equipped with several scrapers 3, which, driven by a rotating sleeve 4, scrape the inner wall of the oil well to effectively remove wax deposits. The wax removal device is also equipped with several jetting blocks 8, which spray cleaning fluid simultaneously with the scraping process, further dissolving and flushing away the scraped wax, ensuring the cleanliness of the oil well's inner wall. A hydraulic motor assembly meshes with a gear structure on the rotating sleeve 4, enabling the rotating sleeve 4 to rotate under the drive of the hydraulic motor 2. This design not only provides strong driving force but also ensures smooth and continuous rotation. The cone head 6 is equipped with a distance sensor 16, which can monitor the diving depth in real time, which is helpful for locating the position of the wax. The upper outer wall of the bearing tube 1 is covered with a protective sleeve 11. This design can effectively protect the structure of the rotating sleeve 4 in the wax scraper and prevent it from being damaged during use. The combined use of the scraper 3 and the spray block 8 makes the wax scraper perform well in both scraping and cleaning. The scraper 3 is responsible for physically removing the wax, while the spray block 8 further dissolves the residual wax with chemical cleaning fluid and hot washing fluid. The combination of the two greatly improves the efficiency and effect of wax scraping, thereby achieving the goal of improving the production efficiency and service life of the oil well.

[0038] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A jet-rotary composite oil well wax scraper, characterized in that, include: The carrier tube (1), the cone (6), and two dewaxing devices; The bearing tube (1) is a hollow cylindrical structure. A wax flushing tube (5) is provided in the center of the bearing tube (1). An annular liquid channel is provided between the wax flushing tube (5) and the bearing tube (1). A cone head (6) is provided at the lower end of the bearing tube (1). A protective sleeve (11) is fitted on the outer wall of the upper end of the bearing tube (1). The middle part of the bearing pipe (1) is provided with an annular step on the outer edge, and the outer wall of the annular step is provided with a number of liquid supply ports and a number of liquid outlet ports. A motor support (10) is provided on the annular step. Several hydraulic motor assemblies are provided circumferentially on the motor support (10). The hydraulic motor assemblies are connected to the inner wall of the bearing pipe (1). The outer wall of the bearing tube (1) is provided with a rotating sleeve (4), which is located at the lower end of the protective sleeve (11). The rotating sleeve (4) is provided with two dewaxing devices, which are symmetrically arranged on the upper and lower sides of the rotating sleeve (4). The dewaxing device includes: several scrapers (3) and several spray blocks (8); The rotating sleeve (4) is a hollow cylindrical structure. The upper inner wall of the rotating sleeve (4) is machined with a gear structure, which meshes with the hydraulic motor assembly. The cone (6) consists of two parts: the upper end is a hollow cylindrical structure and the lower end is a hollow frustum structure. The upper end of the hollow frustum structure is provided with an inwardly extending step. The upper end of the step is provided with a sealing cover (15). The lower end of the sealing cover (15) is provided with a distance sensor (16). The distance sensor (16) is located inside the hollow frustum structure. The sealing cover (15) limits the distance sensor (16).

2. The jet-rotary composite oil well scraper according to claim 1, characterized in that, The lower end of the bearing tube (1) is threaded on the inner wall, and the lower end of the bearing tube (1) is threaded to a cone (6).

3. The jet-rotary composite oil well scraper according to claim 1, characterized in that, The upper outer wall of the bearing tube (1) is provided with a tapered thread, the protective sleeve (11) is a hollow frustum structure, the inner wall of the protective sleeve (11) is provided with a thread that matches the tapered thread on the outer wall of the bearing tube (1), and the bearing tube (1) is threadedly connected to the protective sleeve (11).

4. The jet-rotary composite oil well scraper according to claim 1, characterized in that, The hydraulic motor assembly includes: a hydraulic motor (2), a pinion (13), and a metal conduit; The hydraulic motor (2) is fixedly connected to the motor support (10) by bolts. The output shaft of the hydraulic motor (2) is connected to a small gear (13). The power input end of the hydraulic motor (2) is provided with a metal conduit. One end of the metal conduit is connected to the hydraulic motor (2) and the other end is embedded in the bearing pipe (1). The small gear (13) meshes with the gear structure provided on the upper inner wall of the rotating sleeve (4).

5. The jet-rotary composite oil well scraper according to claim 1, characterized in that, The plurality of scrapers (3) and the plurality of spray blocks (8) are arranged evenly and alternately on the outer wall of the rotating sleeve (4).

6. The jet-rotary composite oil well scraper according to claim 5, characterized in that, The scraper (3) has a T-shaped structure. The left end of the scraper (3) is embedded in the rotating sleeve (4), and the right end of the scraper (3) is processed into a triangular structure. This triangular structure is conducive to quickly scraping off oil and wax. The spray block (8) has a rectangular structure and several through holes are evenly arranged vertically on the spray block (8). The spray block (8) is fixedly connected to the rotating sleeve (4).

7. The jet-rotary composite oil well scraper according to claim 1, characterized in that, The plurality of liquid supply ports are divided into two groups and are evenly arranged circumferentially on the outer wall of the annular step. The two groups of liquid supply ports are symmetrically arranged and are respectively connected to the inner wall of the dewaxing device.

8. The jet-rotary composite oil well scraper according to claim 7, characterized in that, The plurality of liquid outlets are evenly and circumferentially arranged on the outer wall of the annular step, and the liquid outlets are located on the symmetrical line of the two sets of liquid supply ports.

9. The jet-rotary composite oil well scraper according to claim 1, characterized in that, The upper end of the cone (6) has a hollow cylindrical structure with several rectangular through holes evenly distributed around its outer wall. The rectangular through holes are connected to the wax-flushing tube (5).

10. The jet-rotary composite oil well scraper according to claim 1, characterized in that, A lower support ring (12) is provided between the cone (6) and the rotating sleeve (4), and the lower support ring (12) and the cone (6) are integrally formed; A lower sealing ring (7) is provided between the lower support ring (12) and the rotating sleeve (4).

11. The jet-rotary composite oil well scraper according to claim 1, characterized in that, An upper sealing ring (9) is provided between the protective sleeve (11) and the rotating sleeve (4), and an inner sealing ring (14) is provided between the rotating sleeve (4) and the bearing tube (1).

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