A cleaning tool for a compound jet sleeve of a porous impeller rotary nozzle

Abstract

The present invention relates to a cleaning tool for a composite jet sleeve of a porous impeller rotary nozzle, which comprises a porous jet body and a rotary nozzle body. A plurality of jet nozzles that obliquely penetrate inside and outside are arranged on the side wall of the porous jet body. One end of the porous jet body is rotatably and sealingly connected to and communicated with the rotary nozzle body. There is a fluid passage that penetrates along the rotation center line inside the rotary nozzle body. A plurality of spray holes communicated with the fluid passage are arranged at intervals along the circumferential direction on the side wall of the rotary nozzle body. Rotary nozzles are installed in the spray holes. The spraying directions of some or all of the rotary nozzles are inclined along the circumferential direction of the rotary nozzle body, and the inclination directions are the same. A swirl nozzle is assembled inside one end of the fluid passage away from the porous jet body. A diversion passage is arranged at one end of the swirl nozzle close to the porous jet body, and a conical spray port is arranged at the other end. A diversion impeller is arranged inside the swirl nozzle. Advantages: It can safely and efficiently clean the casing and the bottom of the well.

Description

Technical Field

[0001] The present invention relates to casing cleaning technology, and particularly to a composite jet casing cleaning tool with a porous impeller rotating nozzle. Background Art

[0002] During the oil and gas exploitation process, crude oil continuously flows from the formation to the wellbore and is transported to the ground through the oil pipe. Over time, paraffin and heavy oil in the crude oil adhere to the inner walls of the casing or the oil pipe first, causing the pipe diameter to shrink and reducing the oil well production. In addition, sediment in the formation will also be transported to the bottom of the well along with the crude oil exploitation and adhere to the inner walls of the casing or the oil pipe to form scale. On the one hand, the scale in the casing and the oil pipe reduces the casing diameter and blocks the fluid flow. On the other hand, the flowing sediment may also cause the perforation holes to be blocked and pose a risk of sand jamming to the equipment at the bottom of the well, ultimately hindering oil exploitation and causing the production of the oil well to decrease rapidly. Generally, after the oil well has produced for a period of time, the inner walls of the oil pipe and the casing will be cleaned. The commonly selected methods include mechanical scraping and water jet cleaning methods. Water jet technology has developed rapidly in recent decades due to its high efficiency, cleanliness, low cost, etc., and has been widely used in well completion operations such as sand washing and well flushing.

[0003] Currently, the commonly used casing / oil pipe cleaning tools include internal swirl jet tools, external vortex jet tools, and nozzle rotating jet tools. Among them, the internal swirl jet tool installs a guiding impeller inside the nozzle outlet to change the flow direction of the fluid and convert the axial jet into a rotating jet with circumferential velocity for cleaning the inner walls of the oil pipe or the casing. The external vortex jet tool mainly opens multiple jet holes with a certain diameter and angle on the outer surface of the tool, and the fluid flows through the jet holes to form a high-speed jet to wash the inner walls of the casing and the oil pipe. The nozzle rotating jet tool includes a tool body and a rotating nozzle. Under the action of the jet reaction force, the rotating nozzle is driven to rotate, and under the combined action of the damping liquid and the driving force between the rotating nozzle and the body, the rotating nozzle maintains a relatively stable rotation speed, and the rotating jet formed by the rotating nozzle cleans the inner walls of the oil pipe and the casing.

[0004] However, the above three jet cleaning tools often have their own drawbacks. For the internal swirl tool, the swirl characteristics of its jet are weak, and it is difficult to form effective cleaning inside large-diameter casings. For the external vortex tool, the angle and direction of the jet are fixed, and there is a possibility that the inner walls of the casing and the oil pipe cannot be completely cleaned at certain sizes. For the nozzle rotating jet tool, under the complex downhole working conditions, there may be a problem that the nozzle rotation is difficult.

[0005] In view of the various problems existing in the existing jet cleaning tools, it is necessary to provide a porous impeller rotating nozzle jet casing cleaning tool to ensure the safe and efficient completion of the cleaning and scale removal work on the inner wall of the casing and the bottom of the well. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a porous impeller rotating nozzle composite jet sleeve cleaning tool, which effectively overcomes the defects of the prior art.

[0007] The technical solution of the present invention to solve the above technical problem is as follows:

[0008] A porous impeller rotating nozzle composite jet sleeve cleaning tool includes a porous jet body and a rotating nozzle body. The porous jet body is a circular tubular member, and a plurality of jet nozzles that penetrate through its inside and outside obliquely are arranged at intervals along its axial direction and circumferential direction on its side wall. One end of the porous jet body is rotatably and sealingly connected and communicated with the rotating nozzle body. The rotating nozzle body has a fluid passage that penetrates along its rotation center line. A plurality of spray holes communicated with the fluid passage are arranged at intervals along the circumferential direction on the side wall of the rotating nozzle body. Rotating nozzles are installed in the spray holes. The spraying directions of some or all of the rotating nozzles are inclined along the circumferential direction of the rotating nozzle body, and the inclination directions are the same. A swirl nozzle is assembled inside the end of the fluid passage far from the porous jet body. The swirl nozzle is provided with a diversion passage at one end close to the porous jet body and a conical spray port at the other end. A diversion impeller is arranged inside the swirl nozzle.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Further, the outer shape of the rotating nozzle body is bullet-shaped, and a cylindrical fluid passage is coaxially arranged inside it. The rotating nozzle body is coaxially arranged with the porous jet body.

[0011] Further, the swirl nozzle includes a cylindrical nozzle body with one end open and a fixed cover. The nozzle body is fixedly assembled at the other end of the fluid passage. The other end of the swirl nozzle is provided with the spray port. The fixed cover is sealingly assembled at the open end of the nozzle body, and the diversion passage passing through it is arranged on it. The diversion impeller is located inside the nozzle body and is assembled on the fixed cover.

[0012] Further, an assembly hole is arranged in the middle of the fixed cover. One end of the diversion impeller close to the fixed cover is connected to the assembly hole through a connecting shaft or a pin shaft. A plurality of diversion channels are arranged and evenly distributed around the assembly hole.

[0013] Further, it further includes a power body. The above power body is a circular tubular member. One end of the above porous jet body is coaxially and hermetically connected and communicated with one end of the above power body, and is hermetically connected and communicated with the above rotary nozzle body rotatably through the above power body. An upper disc valve, a lower disc valve and a rotary impeller are provided in the above power body. The above upper disc valve is rotatably assembled at one end inside the above power body. A plurality of first flow channels are spaced apart on the outer periphery of the above upper disc valve. One end of the above rotary impeller is connected to the corresponding end of the above rotary nozzle body. A central flow channel passing through both ends thereof is provided inside the above rotary impeller. The above central flow channel is communicated with the above fluid channel. The above lower disc valve is assembled at the other end of the above rotary impeller. A plurality of second flow channels are spaced apart on the outer periphery of the above lower disc valve. The above lower disc valve is superposed with the upper disc valve, and a flow channel communicated with the above central flow channel is provided through the middle parts of the two. The above lower disc valve can be rotated relative to the above upper disc valve to make the above second flow channels and the first flow channels communicate with each other or be distributed alternately. A return hole is provided through the side wall of the above rotary impeller near one end thereof.

[0014] Further, a connecting portion coaxial with the above central flow channel is provided at one end of the above rotary nozzle body. One end of the connecting portion extends into the inside of one end of the above power body and is rotatably connected to the inner wall of the above power body through a bearing.

[0015] Further, the above bearing is a thrust bearing.

[0016] Further, a sealing sleeve is connected to one end of the above power body. The sealing sleeve is assembled outside the above connecting portion, and the two can rotate relative to each other. A sealing ring groove is provided on the outer periphery of the above connecting portion, and a sealing member in sealing contact with the above sealing sleeve is installed in the above sealing ring groove.

[0017] The beneficial effects of the present invention are as follows: It can clean the casing and the bottom of the well safely and efficiently, and wash the debris on the inner wall of the casing and the bottom of the well out of the wellbore in time, keep the wellbore clean, and provide a good working environment for downhole tools and crude oil production. Description of the Drawings

[0018] Figure 1 It is a structural cross-sectional view of the porous impeller rotary nozzle compound jet casing cleaning tool of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the fixed cover of the swirl nozzle in the porous impeller rotary nozzle compound jet casing cleaning tool of the present invention;

[0020] Figure 3 It is a structural cross-sectional view of the fixed cover of the swirl nozzle in the porous impeller rotary nozzle compound jet casing cleaning tool of the present invention;

[0021] Figure 4This is a structural cross-sectional view of the nozzle body of the swirl nozzle in the porous impeller rotating nozzle compound jet casing cleaning tool of the present invention;

[0022] Figure 5 This is a structural schematic diagram of another embodiment of the porous impeller rotating nozzle compound jet casing cleaning tool of the present invention;

[0023] Figure 6 is Figure 5 A structural schematic diagram of the upper disc valve in the embodiment;

[0024] Figure 7 is Figure 5 A structural schematic diagram of the lower disc valve in the embodiment;

[0025] Figure 8 is Figure 5 A structural cross-sectional view of the rotating impeller in the embodiment.

[0026] In the drawings, the list of components represented by each reference numeral is as follows:

[0027] 1, porous jet body; 2, rotating nozzle body; 3, rotating nozzle; 4, swirl nozzle; 5, power body; 11, jet nozzle; 21, fluid passage; 22, connecting portion; 23, bearing; 41, guide impeller; 42, nozzle body; 43, fixed cover; 51, upper disc valve; 52, lower disc valve; 53, rotating impeller; 54, sealing sleeve; 221, seal; 511, first flow passage; 521, second flow passage; 531, central flow channel; 532, return hole. Specific embodiments

[0028] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0029] Embodiment: As Figure 1As shown in the figure, the porous impeller rotary nozzle compound jet casing cleaning tool of this embodiment includes a porous jet body 1 and a rotary nozzle body 2. The porous jet body 1 is a circular tubular member, and a plurality of jet nozzles 11 that penetrate through its inside and outside obliquely are arranged at intervals along its axial direction and circumferential direction on its side wall. One end of the porous jet body 1 is rotatably and sealingly connected to and communicated with the rotary nozzle body 2 (the rotation center of the rotary nozzle body 2 coincides with the axis of the porous jet body 1). The rotary nozzle body 2 has a fluid passage 21 that penetrates along its rotation center line. A plurality of spray holes communicated with the fluid passage 21 are arranged at intervals along the circumferential direction on the side wall of the rotary nozzle body 2. Rotary nozzles 3 are installed in the spray holes. The jetting directions of some or all of the rotary nozzles 3 are all inclined along the circumferential direction of the rotary nozzle body 2, and the inclination directions are the same. A swirl nozzle 4 is assembled inside the end of the fluid passage 21 far from the porous jet body 1. The swirl nozzle 4 is provided with a diversion passage (designated as a in the figure) at one end close to the porous jet body 1, and a conical jetting port at the other end. A diversion impeller 41 is arranged inside the swirl nozzle 4.

[0030] The working process is as follows:

[0031] During the cleaning process of the casing (oil pipe), the high-pressure fluid flows through the inner cavity of the porous jet body 1 and the fluid passage 21 of the rotary nozzle body 2, and is ejected through the external jet nozzles 11, rotary nozzles 3 and swirl nozzles 4 to form a high-speed jet. During the working process, the porous jet body 1 of this tool does not rotate. The reaction torque formed by the ejection of part of the high-pressure fluid through some or all of the rotary nozzles 3 drives the rotary nozzle body 2 to rotate. The rotation of the rotary nozzle body 2 in turn drives the fluid to form a rotary jet after flowing through the rotary nozzles 3. Part of the high-pressure fluid flows through the diversion impeller 41 and changes the flow direction. When the fluid passes through the jetting port of the swirl nozzle 4, a high-speed jet with a circumferential velocity is formed, and under the high-speed rotation of the rotary nozzle body 2, its circumferential velocity is further enhanced. During the lowering and lifting processes of the tool, the rotational movement of the rotary nozzle body 2 is coupled with the dragged axial movement, quickly cutting the scale on the inner wall of the casing (oil pipe). The subsequent jet to the air can fully cover the inner wall of the casing (oil pipe), thereby quickly removing the dirt on the casing (oil pipe), improving the operation efficiency, and shortening the operation time.

[0032] The advantage of the whole device is to realize the combination of external swirl, internal vortex and rotary jet, realize the efficient removal of blockage by the front swirl, the efficient division and scale removal by the middle rotary jet, and the efficient dirt removal by the rear porous nozzle jet, so as to achieve the purpose of efficient scale removal and timely scale cleaning, further improve the cleaning efficiency of the casing (oil pipe), shorten the non-production time caused by the casing (oil pipe) cleaning, and ensure the oil well production benefit.

[0033] In addition, by combining jets with different fixed directions and rotating jets, the entire device can achieve the following technical effects:

[0034] (1) It can achieve all-round cleaning of the inner wall of the casing / tubing. Since this jet cleaning tool combines the characteristics of the jet nozzles 11 on the porous jet body 1 and the jets of the rotating nozzles 3, the rotating spray head body 2 at the lower part of the tool rotates to effectively clean the scale on the inner wall of the casing / tubing. The jet nozzles 11 on the upper porous jet body 1 can generate a swirling flow in the annulus, further cleaning the dirt on the inner wall of the casing / tubing, increasing the annulus return velocity, reducing the operation process of repeatedly moving the pipe string, improving the cleaning effect when dragging the pipe string at one time. At the same time, the jet cleaning tool can generate periodic changes in pressure and flow locally, causing the pulses at each nozzle of the tool and enhancing the jet cleaning effect.

[0035] (2) Through this device, it can efficiently remove the obstruction when encountering resistance during the lowering process of casing / tubing cleaning. A swirl nozzle 4 is installed at the front end of the rotating spray head body 2, which can change the direction of fluid movement and convert the fluid into a rotating jet with a certain circumferential velocity. Due to the existence of a certain circumferential velocity, the rotating jet expands the affected area of the jet and can achieve efficient cleaning of the obstruction.

[0036] (3) This device can be applied under various well conditions. Under medium and shallow well conditions, the swirl nozzle 4, the rotating nozzle 3, and the jet nozzle 11 work simultaneously to achieve effective cleaning of the inner wall of the casing / tubing. Under deep well conditions, when the displacement is limited, the swirl nozzle 4 can be closed by throwing a ball to improve the jet performance of the jet nozzle 11 and the rotating nozzle 3, achieving effective cleaning of the inner wall of the casing / tubing.

[0037] It should be particularly noted that: in this embodiment, the axis of the rotating nozzle 3 is arranged at an angle with the axis of the rotating spray head body 2 or the porous jet body 1, and its spraying direction is generally inclined towards the end of the rotating spray head body 2 away from the porous jet body 1. Moreover, the spraying direction is also inclined in the circumferential direction of the rotating spray head body 2, so that the reaction force formed during its spraying process pushes the rotating spray head body 2 to rotate relative to the porous jet body 1.

[0038] As a preferred embodiment, the outer shape of the above-mentioned rotating spray head body 2 is bullet-shaped, and a cylindrical fluid passage 21 is coaxially provided inside it. The above-mentioned rotating spray head body 2 is coaxially arranged with the above-mentioned porous jet body 1.

[0039] In the above-mentioned implementation scheme, the outer surface of the rotating spray head body 2 is smooth and round, which can reduce the resistance during rotation and energy consumption. At the same time, its internal fluid passage 21 and the rotating spray head body 2 of the porous jet body 1 are both coaxially arranged, concentric during rotation, with relatively stable operation and relatively stable jets formed.

[0040] As a preferred embodiment, as Figure 1 、 2 As shown in FIG. 3, the above-mentioned swirl nozzle 4 includes a cylindrical nozzle body 42 with one end open and a fixing cover 43. The above-mentioned nozzle body 42 is fixedly assembled at the other end of the above-mentioned fluid passage 21. The other end of the above-mentioned swirl nozzle 4 is provided with the above-mentioned injection port. The above-mentioned fixing cover 43 is hermetically assembled at the open end of the above-mentioned nozzle body 42, and is provided with the above-mentioned diversion holes penetrating through it. The above-mentioned diversion impeller 41 is located inside the above-mentioned nozzle body 42 and is assembled on the above-mentioned fixing cover 43.

[0041] In the above-mentioned embodiment, after the fluid enters the fluid passage 21 of the rotary sprinkler body 2 through the porous jet body 1, a part of the high-pressure fluid flows through the plurality of diversion holes on the fixing cover 43 and passes through the diversion impeller 41, changing the flow direction. When the fluid passes through the injection port at the other end, a high-speed jet with circumferential velocity is formed, and under the high-speed rotation of the rotary sprinkler body 2, its circumferential velocity is further enhanced. The entire swirl nozzle 4 adopts a combined structure, which is convenient for disassembly and assembly, reduces the production difficulty, and is easy to replace accessories.

[0042] In this embodiment, the fixing cover 43 can be a round cover, the outer circle of which is provided with threads, and the inner wall of the open end of the nozzle body 42 is provided with threads. The fixing cover 43 is threadedly connected and assembled with the nozzle body 42.

[0043] It should be added that the above-mentioned fixing cover 43 can carry a rubber ball / iron ball, and the diversion holes are sealed by the method of throwing a ball to realize the opening and closing of the swirl nozzle 4.

[0044] In the above-mentioned embodiment, threads can be provided on the outside of the nozzle body 42, and threads can be provided on the inner wall of one end of the fluid passage 21. The two are threadedly connected. And in order to prevent the two from separating, anaerobic glue can be applied to the threads.

[0045] As a preferred embodiment, an assembly hole (designated as e in the figure) is provided in the middle of the above-mentioned fixing cover 43. One end of the above-mentioned diversion impeller 41 close to the above-mentioned fixing cover 43 is connected to the above-mentioned assembly hole through a connecting shaft or a pin shaft. The above-mentioned diversion holes are provided with a plurality of them and are evenly spaced around the above-mentioned assembly hole.

[0046] In the above-mentioned embodiment, the design of multiple backflow channels is conducive to the liquid entering the inner cavity of the swirl nozzle 4 evenly and stably, forming a stable swirl ejection.

[0047] As Figure 4 shown, a jet port (designated as d in the figure) is opened in the middle of the other end of the nozzle body 42, and the inner wall of the other end is tapered and converges and narrows at the jet port (that is, the inner wall of the other end is a tapered ramp surface f that converges towards the center), which is conducive to the fluid forming a high-speed swirl and ejecting through the jet port.

[0048] As a preferred embodiment, as Figure 5 shown, it further includes a power body 5. The power body 5 is a circular tubular member. One end of the porous jet body 1 is coaxially and hermetically connected and communicated with one end of the power body 5, and is rotatably and hermetically connected and communicated with the rotary nozzle body 2 through the power body 5. An upper disk valve 51 (as Figure 6 shown), a lower disk valve 52 (as Figure 7 shown) and a rotary impeller 53 (as Figure 8 shown) are provided in the power body 5. The upper disk valve 51 is rotatably assembled at one end inside the power body 5. A plurality of first flow channels 511 are spaced apart on the outer periphery of the upper disk valve 51. One end of the rotary impeller 53 is connected to the corresponding end of the rotary nozzle body 2. A central flow channel 531 penetrating through both ends thereof is provided in the rotary impeller 53. The central flow channel 531 is communicated with the fluid channel 21. The lower disk valve 52 is assembled at the other end of the rotary impeller 53. A plurality of second flow channels 521 are spaced apart on the outer periphery of the lower disk valve 52. The lower disk valve 52 is superposed with the upper disk valve 51, and a flow channel communicated with the central flow channel 531 is provided through the middle of the two. The lower disk valve 52 can be rotated relative to the upper disk valve 51 so that the second flow channels 521 and the first flow channels 511 are mutually penetrated or staggered. A return hole 532 is provided through the side wall of the rotary impeller 53 near one end thereof.

[0049] The usage process is as follows:

[0050] During the cleaning process of the casing (oil pipe), the high-pressure fluid flows through the inner cavity of the porous jet body 1, the power body 5, and the fluid passage 21 of the rotating nozzle body 2, and is ejected through the jet nozzles 11 facing the outside, the rotating nozzles 3, and the swirl nozzles 4 to form high-speed jets. During the working process, the porous jet body 1 of this tool does not rotate. The reaction torque formed by the ejection of part of the high-pressure fluid through part or all of the rotating nozzles 3 drives the rotation of the rotating nozzle body 2. The rotation of the rotating nozzle body 2 in turn drives the fluid to form a rotating jet after flowing through the rotating nozzles 3. Part of the high-pressure fluid flows through the guide impeller 41 to change the flow direction. When the fluid passes through the ejection orifice of the swirl nozzle 4, a high-speed jet with a circumferential velocity is formed, and under the high-speed rotation of the rotating nozzle body 2, its circumferential velocity is further enhanced. At the same time, the rotation of the rotating nozzle body 2 drives the rotation of the lower disk valve 52 and the rotating impeller 53. The second flow-through channel 521 on the lower disk valve 52 and the first flow-through channel 511 on the upper disk valve 51 are constantly in a state of coincidence and intersection. When in the coincidence state, the effective flow-through area (the space through which the liquid can pass) of the second flow-through channel 521 of the lower disk valve 52 is large, and a large amount of high-pressure fluid impacts the blades of the rotating impeller 53 (designated by m in the figure). The rotating impeller 53 generates a torque opposite to the rotation of the rotating nozzle body 2 and then flows back to the central flow channel 531 through the return hole 532. When the second flow-through channel 521 and the first flow-through channel 511 are in the intersection state, the flow-through channel is small, and a small amount of high-pressure fluid impacts the rotating impeller 53. Through the continuous alternation of the coincidence and intersection states, the flow rate in the central flow channel 531 and the local pressure above the upper disk valve 51 change periodically, thereby generating pulses at the jet nozzles 11, the rotating nozzles 3, and the swirl nozzles 4, improving the cleaning efficiency.

[0051] During the process of lowering and lifting the tool, the rotational movement of the rotating nozzle body 2 is coupled with the axial movement of dragging, quickly cutting the scale-free part on the inner wall of the casing (oil pipe). On the one hand, the jet nozzles 11 on the subsequent porous jet body 1 generate swirls in the annulus. The swirls generate tangential forces, which contribute to the further comprehensive cleaning of the inner wall of the casing (oil pipe), improving the cleaning effect; on the other hand, it is beneficial to increase the annulus return velocity, which helps the return of dirt debris, and thus quickly remove the dirt on the casing (oil pipe), improving the operation efficiency and shortening the operation time.

[0052] During the working process of the tool, the rotating impeller 53 is impacted by high-pressure fluid. On the one hand, it provides a reverse torque. On the other hand, the rotating impeller 53 is in a submerged environment, and the submerged environment exerts a certain resistance on the rotating impeller 53, slowing down the rotation speed of the rotating nozzle body 2, reducing the jet atomization degree, enhancing the jet impact effect, and improving the cleaning ability of the tool.

[0053] The advantages of the whole structure are as follows: 1) It realizes the combination of external swirl, internal vortex and rotary jet, achieving efficient removal of blockage by the front swirl, efficient division of scale by the middle rotary jet, efficient removal of dirt by the rear multi-hole nozzle jet and improvement of the backflow speed; 2) It adopts a hydraulic method to slow down the rotation speed of the nozzle head, improve the jet impact ability, and achieve the purpose of efficient scale removal and timely scale cleaning; 3) Through the rotation of the rotary impeller 53, the flow rate and local pressure change periodically, and then pulses are generated at the nozzle, further improving the cleaning efficiency of the casing (oil pipe), shortening the non-production time caused by the cleaning of the casing (oil pipe), and ensuring the oil well production benefit.

[0054] As a preferred embodiment, one end of the above-mentioned rotary nozzle body 2 is extended with a connecting portion 22 coaxial with the above-mentioned central flow channel 531. One end of the connecting portion 22 extends into the interior of one end of the above-mentioned power body 5 and is rotatably connected to the inner wall of the above-mentioned power body 5 through a bearing 23.

[0055] In the above-mentioned implementation scheme, through the end of the connecting portion 22 extending into the power body 5 and being rotatably connected with the bearing 23, the two are tightly connected and have good rotation performance.

[0056] As a preferred embodiment, the above-mentioned bearing 23 is a thrust bearing.

[0057] In the above-mentioned implementation scheme, it is beneficial to the axial rotation connection between the rotary nozzle body 2 and the power body 5 and can bear axial force.

[0058] As a preferred embodiment, one end of the above-mentioned power body 5 is connected with a sealing sleeve 54. The sealing sleeve 54 is assembled (sealing sleeve provided) outside the connecting portion 22, and the two can rotate relative to each other. A sealing ring groove is provided on the outer periphery of the connecting portion 22, and a sealing member 221 in sealing contact with the sealing sleeve 54 is installed in the sealing ring groove.

[0059] In the above-mentioned implementation scheme, the sealing sleeve 54 can seal the end of the connection between the power body 5 and the connecting portion 22. At the same time, it can also provide a limit for the installation of the thrust bearing, making the structural connection between the devices closer and the structure more stable.

[0060] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It 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. Therefore, it should not be construed as a limitation to the present invention.

[0061] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms such as "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0064] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0065] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A porous impeller rotary nozzle compound jet sleeve cleaning tool, characterized in that: It includes a porous jet body (1) and a rotating nozzle body (2). The porous jet body (1) is a circular tubular member, and a plurality of jet nozzles (11) that penetrate through its inside and outside obliquely are arranged at intervals along its axial direction and circumferential direction on its side wall. One end of the porous jet body (1) is rotatably and sealingly connected and communicated with the rotating nozzle body (2). The rotating nozzle body (2) has a fluid passage (21) that penetrates along its rotation center line. A plurality of spray holes communicated with the fluid passage (21) are arranged at intervals along the circumferential direction on the side wall of the rotating nozzle body (2). Rotating nozzles (3) are installed in the spray holes. The spraying directions of some or all of the rotating nozzles (3) are inclined along the circumferential direction of the rotating nozzle body (2), and the inclination directions are the same. A swirl nozzle (4) is assembled inside one end of the fluid passage (21) away from the porous jet body (1). A diversion passage is provided at one end of the swirl nozzle (4) close to the porous jet body (1), and a conical spraying port is provided at the other end. A diversion impeller (41) is provided inside the swirl nozzle (4); It also includes a power body (5). The power body (5) is a circular tubular member. One end of the porous jet body (1) is coaxially and sealingly connected and communicated with one end of the power body (5), and is rotatably and sealingly connected and communicated with the rotating nozzle body (2) through the power body (5). An upper disk valve (51), a lower disk valve (52) and a rotating impeller (53) are provided in the power body (5). The upper disk valve (51) is rotatably assembled at one end inside the power body (5). A plurality of first flow-through channels (511) are arranged at intervals on the outer circumference of the upper disk valve (51). One end of the rotating impeller (53) is connected to the corresponding end of the rotating nozzle body (2). A central flow channel (531) that penetrates through both ends of it is provided inside the rotating impeller (53). The central flow channel (531) is communicated with the fluid passage (21). The lower disk valve (52) is assembled at the other end of the rotating impeller (53). A plurality of second flow-through channels (521) are arranged at intervals on the outer circumference of the lower disk valve (52). The lower disk valve (52) is superposed with the upper disk valve (51), and a flow channel communicated with the central flow channel (531) is provided through the middle of the two. The lower disk valve (52) can be rotated relative to the upper disk valve (51) so that the second flow-through channel (521) and the first flow-through channel (511) are mutually penetrated or staggeredly distributed. A return hole (532) is provided through the side wall of the rotating impeller (53) near one end of it; By throwing a ball to close the swirl nozzle (4), the jet performance of the jet nozzle (11) and the rotating nozzle (3) is improved.

2. The composite jet sleeve cleaning tool for a porous impeller rotary nozzle according to claim 1, characterized in that: The outer shape of the rotating nozzle body (2) is bullet-shaped, and a cylindrical fluid passage (21) is coaxially provided inside it. The rotating nozzle body (2) is coaxially arranged with the porous jet body (1).

3. A porous impeller rotary nozzle combined jet sleeve cleaning tool according to claim 1, characterized in that: The swirl nozzle (4) includes a cylindrical nozzle body (42) with one end open and a fixing cover (43). The nozzle body (42) is fixedly assembled at the other end of the fluid passage (21). The other end of the swirl nozzle (4) is provided with the injection port. The fixing cover (43) is hermetically assembled at the open end of the nozzle body (42), and is provided with the guiding flow passage penetrating through it. The guiding flow impeller (41) is located inside the nozzle body (42) and is assembled on the fixing cover (43).

4. The composite jet sleeve cleaning tool for a porous impeller rotating nozzle according to claim 3, characterized in that: The middle of the fixing cover (43) is provided with an assembly hole. One end of the guiding flow impeller (41) close to the fixing cover (43) is connected to the assembly hole through a connecting shaft or a pin shaft. There are multiple guiding flow passages, which are evenly spaced around the assembly hole.

5. A porous impeller rotary nozzle compound jet casing cleaning tool according to claim 1, characterized in that: One end of the rotating spray head body (2) extends to be provided with a connecting portion (22) coaxial with the central flow passage (531). One end of the connecting portion (22) extends into the inside of one end of the power body (5) and is rotatably connected to the inner wall of the power body (5) through a bearing (23).

6. The porous impeller rotary nozzle composite jet sleeve cleaning tool according to claim 5, characterized in that: The bearing (23) is a thrust bearing.

7. The porous impeller rotating nozzle compound jet sleeve cleaning tool according to claim 5, characterized in that: One end of the power body (5) is connected with a sealing sleeve (54). The sealing sleeve (54) is assembled outside the connecting portion (22), and the two can rotate relative to each other. A sealing ring groove is provided on the outer circumference of the connecting portion (22), and a sealing member (221) in sealing contact with the sealing sleeve (54) is installed in the sealing ring groove.

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