A spin flow wellbore cleanup tool

Abstract

The present application relates to a kind of cyclone borehole cleaning tools, including tube body and wing, the upper and lower ends of tube body have the connecting structure for being connected with drill pipe, wing is located on the outer wall of tube body, wing forms the flow channel for fluid flow along the space of the circumference of tube body two sides, cyclone borehole cleaning tool also has the nozzle being communicated with the inner cavity of tube body, define the included angle of jet flow that nozzle sprays with the axis of tube body is α, jet flow is positively inclined when being sprayed towards well wall, the angle of axial spraying along tube body is 0 °, when being inclined and sprayed towards tube body, α is negative value, the included angle of jet flow with the axis of tube body α≤0 °, such cyclone borehole cleaning tool has higher rock debris removal capacity, and jet flow sprayed will not cause damage to well wall.

Description

TECHNICAL FIELD

[0001] The present application relates to a spiral flow borehole cleaning tool. BACKGROUND

[0002] In the field of oil and gas drilling engineering technology, special well types such as horizontal wells, extended reach wells, and directional wells have been increasingly applied. Compared with conventional straight wells, the inclination angle of such wells is relatively large, and cuttings are prone to settle and accumulate on the lower wall of the wellbore under the action of gravity when they move to the wellhead in such sections, forming a cuttings bed. Similarly, the drilling tools in the high-angle well section also adhere to the lower wall under the action of gravity, and when the drilling tools encounter the cuttings bed, they are prone to have difficulties in tripping in, and in severe cases, even cause the drilling tools to be stuck due to adhesion. Such downhole complex situations seriously affect normal operations.

[0003] To solve the above problems, the existing technology is to use a borehole cleaning tool to clean the downhole cuttings bed. For example, a horizontal section gas drilling borehole cleaning tool is disclosed in Chinese Patent Publication No. CN103775010A, published on May 7, 2014, which includes a pipe body having connecting structures at the upper and lower ends of the pipe body, so that the borehole cleaning tool can be connected in series on the drill pipe. In addition, the pipe body also has helical wings that act as centralizing bars to provide centralizing effect. Meanwhile, adjacent two wings enclose a helical flow channel. When working, the borehole cleaning tool rotates with the drill pipe, grinds cuttings, increases gas flow rate, and enhances the ability of gas to flow around, so that the gas flow through the flow channel is stirred to form a spiral gas flow, which carries the cuttings out of the well. Such a borehole cleaning tool relies on the rotating action and the flow channel structure to remove the downhole cuttings, and the cleaning method is single, the power for cleaning and carrying cuttings has certain limitations, and there is a technical problem of weak cuttings removal capacity.

[0004] To solve this problem, the existing technology has some improvements. For example, a lateral jet flow type cuttings bed cleaning tool is disclosed in Chinese Utility Model Patent Publication No. CN205089245U, published on March 16, 2016, which has centralizing wings on the outer circumferential surface of the sidewall of the columnar body, and also has bypass holes that communicate with the drilling flow channel and extend radially along the columnar body. When working, the centralizing wings rotate to disturb the drilling fluid into a spiral flow state, and the drilling fluid is jetted to the well wall in a high-pressure and high-speed jet flow state through the bypass holes, impacting and disturbing the cuttings to make them easy to be carried out by the drilling fluid. Although this scheme can increase the capacity of the cleaning tool to remove cuttings, the high-pressure jet flow jetted through the bypass holes impacts the well wall, and the well wall at the depth of the formation has poor stability, which easily causes the well wall to be damaged by the impact. SUMMARY

[0005] The present application aims to provide a spiral flow wellbore cleaning tool to solve the technical problem that the jet flow of the wellbore cleaning tool in the prior art can cause damage to the well wall.

[0006] To achieve the above-mentioned purpose, the technical scheme of the spiral flow wellbore cleaning tool provided by the present application is as follows:

[0007] The spiral flow wellbore cleaning tool comprises a pipe body and a wing, the upper and lower ends of the pipe body are provided with connecting structures for connecting with a drill pipe, the wing is located on the outer wall of the pipe body, the space on both sides of the pipe body in the circumferential direction forms a flow channel for fluid flow, and the spiral flow wellbore cleaning tool is further provided with a nozzle in communication with the inner cavity of the pipe body, the angle between the jet flow sprayed by the nozzle and the axis of the pipe body is defined as α, the angle α is positive when the jet flow is sprayed obliquely towards the well wall, the angle is 0° when the jet flow is sprayed along the axis of the pipe body, and the angle α is negative when the jet flow is sprayed obliquely towards the pipe body, and the angle α between the jet flow and the axis of the pipe body is ≤0°.

[0008] The beneficial effect is that the spiral flow wellbore cleaning tool is connected to the drill pipe through the connecting structure, rotates with the drill pipe in the well, scrapes and grinds the well cuttings through the wing, and at the same time, the fluid carrying the cuttings flows to the wellhead in the form of spiral flow after passing through the flow channel, achieving spiral flow to remove the cuttings, at the same time, the jet flow sprayed from the nozzle impacts and disturbs the cuttings in the well, so that the cuttings are more easily carried out by the fluid, the direction of the jet flow is limited, and it is ensured that the jet flow does not cause damage to the well wall, especially when the jet flow is sprayed along the axis of the pipe body, the jet flow can effectively assist the fluid in the spiral flow state stirred by the wing, and the ability of the fluid to carry the cuttings out of the well is improved.

[0009] As a further improvement, the wing has at least two wings, each wing is arranged in the circumferential direction of the pipe body, and the at least two wings are provided with the nozzle.

[0010] The beneficial effect is that the nozzle is arranged on the wing, and the nozzle does not need to be additionally arranged on the pipe body, so as to ensure that the spiral flow wellbore cleaning tool has the simplest structure as possible, and more importantly, the nozzle and the flow channel have a closer cooperation distance, so as to ensure that the jet flow sprayed by the nozzle can effectively cooperate with the fluid in the spiral flow state, at the same time, the nozzle is arranged on at least two wings, and multiple nozzles jointly act, so as to achieve better disturbance effect and improve the cutting removal capacity of the spiral flow wellbore cleaning tool.

[0011] As a further improvement, the wing is a flat plate structure with a length extending along the axis of the pipe body.

[0012] The beneficial effect is that the wing adopts a flat plate structure, so that the wing itself is convenient for production and manufacturing, and more importantly, the flat plate type wing is convenient for processing the corresponding structure to assemble the nozzle, thereby improving the convenience of design and manufacturing of the spiral flow wellbore cleaning tool.

[0013] As a further improvement, the nozzle comprises a housing and a valve core assembly, the housing is provided with a jet flow channel, the valve core assembly is arranged in the jet flow channel to control the opening and closing of the jet flow channel, and the valve core assembly can be opened when the pressure in the inner cavity of the pipe body reaches a set value.

[0014] The beneficial effect is that the valve core assembly capable of being opened at a set pressure is arranged, so that the debris removal capacity of the cyclone well cleaning tool can be controllably improved. In specific use, when the debris in the well is difficult to remove, the pressure in the inner cavity of the pipe body is increased to open the nozzle to jet the fluid to assist the wing to achieve more efficient debris removal. When the scraping and agitation of the wing can meet the debris removal in the well, the nozzle can not be opened to avoid energy waste.

[0015] As a further improvement, the jet flow channel is provided on the wing, and the wing provided with the jet flow channel constitutes the housing of the nozzle.

[0016] The beneficial effect is that the wing is directly used as the housing of the nozzle, without the need to additionally and specially arrange the nozzle housing on the pipe body, which simplifies the structure of the cyclone well cleaning tool and enables the nozzle and the flow channel to have a closer matching distance, so as to ensure that the jet flow jetted by the nozzle can effectively cooperate with the fluid in the cyclone state, thereby improving the debris removal capacity of the cyclone well cleaning tool.

[0017] As a further improvement, the valve core assembly comprises a valve seat, a valve core, a push rod and a spring, the valve seat is fixed in the jet flow channel and has a central hole for the fluid to pass through, the spring is arranged in the jet flow channel, the push rod comprises a plug-in cooperation section in plug-in cooperation with the spring and an extension section extending out of the spring, the extension section has a valve core cooperation structure in stable top pushing cooperation with the valve core, the spring blocks the central hole of the valve seat by top pushing the valve core through the push rod, the plug-in cooperation section of the push rod is tubular, the extension section has a flow gap with the inner wall of the jet flow channel and has a communication channel on the extension section to communicate the flow gap with the central hole of the plug-in cooperation section.

[0018] The beneficial effect is that when the valve core assembly is opened, at least part of the high-speed and high-pressure fluid flows into the central hole of the plug-in cooperation section of the push rod through the central hole of the valve seat, the flow gap and the communication channel, so as to avoid that the spring is excessively impacted by the high-speed and high-pressure fluid, thereby improving the durability of the nozzle and further improving the durability of the cyclone well cleaning tool.

[0019] As a further improvement, the nozzle further comprises a spray cap arranged at the outlet of the jet flow channel, the spray cap has a central hole for the fluid to spray out, the inner opening of the central hole is in a flared structure, and the push rod can extend into the flared structure of the central hole of the spray cap when the valve core assembly is opened.

[0020] The beneficial effect is that the push rod extends into the center hole of the spray cap, the high-speed and high-pressure fluid is directly guided into the spray cap, the impact of the high-speed and high-pressure fluid on the spring is reduced as much as possible, the durability of the spray head is improved as much as possible, and the durability of the cyclone wellbore cleaning tool is improved.

[0021] As a further improvement, the spring is arranged in the spray flow channel in a clearance fit, and the insertion section of the push rod is inserted into the spring in a clearance fit.

[0022] The beneficial effect is that the spring is guided in the spray flow channel, and the push rod is guided in the spring, so that the movement of the push rod is guided, and the push rod can accurately push the valve core to the position of plugging the center hole of the valve seat.

[0023] As a further improvement, the push rod has a ring table that is in abutting fit with the end of the spring, and the ring table is in clearance fit with the inner wall of the spray flow channel.

[0024] The beneficial effect is that the ring table is in clearance fit with the inner wall of the spray flow channel, and the spring is protected by the ring table to avoid the impact of high-speed and high-pressure fluid on the spring. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of embodiment 1 of the cyclone wellbore cleaning tool in the application;

[0026] Figure 2 is a structural schematic view of embodiment 1 of the cyclone wellbore cleaning tool in the application; Figure 1 is a local enlarged view of A in the middle;

[0027] MARK LIST:

[0028] 1, pipe body; 2, wing; 3, spray cap; 4, spray straight passage section; 5, communication straight passage section; 6, plug; 7, valve seat; 8, spring; 9, push rod; 10, valve ball; 11, ring table. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the application clearer, the application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application, that is, the described embodiments are only a part of the embodiments of the application, but not all the embodiments. The components of the embodiments of the application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] The following detailed description of embodiments of the application in the drawings provided is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based upon the embodiments of the application, all other embodiments that would be obtained by one skilled in the art without having to resort to inventive labor are within the scope of the application claimed.

[0031] It should be noted that the relational terms herein such as first, second, and the like are used solely to distinguish one from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional elements of a process, method, article, or apparatus that comprises the enumerated element.

[0032] In the description of the application, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0033] In the description of the application, it should be noted that, unless otherwise clearly specified and limited, the term "provided with" may appear, for example, the object of "provided with" can be part of the body, or arranged separately from the body and connected to the body, which connection can be detachable or non-detachable. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0034] The application will be further described in detail below in conjunction with the embodiments.

[0035] In the specific embodiment 1 of the cyclone wellbore purification tool provided by the application, the structure and working mode of the cyclone wellbore purification tool in the application are introduced by taking the drilling with drilling fluid and the carrying out of cuttings as an example. In other embodiments, the carrying out of drilling fluid cuttings can also be carried out by the way of passing high-pressure gas into the drill pipe.

[0036] As Figure 1As shown, the cyclone wellbore cleaning tool comprises a tubular body 1, and the upper and lower ends of the tubular body 1 are provided with connecting structures, so that the tubular body 1 can be connected with the drill pipe. Specifically, the connecting structure at the upper end of the tubular body 1 is an internal thread, which is matched with the external thread at the lower end of the drill pipe, and the connecting structure at the lower end of the tubular body 1 is an external thread, which is matched with the internal thread at the upper end of the drill pipe. Of course, in other embodiments, the connecting structures at the upper and lower ends of the tubular body can be designed adaptively in combination with the actual structure of the drill pipe, as long as the tubular body can be connected with the drill pipe.

[0037] The cyclone wellbore cleaning tool further comprises wings 2 arranged outside the tubular body 1. In this embodiment, four wings 2 are arranged outside the tubular body 1 along the axial direction at intervals, and the included angle between adjacent two wings 2 is 90°. In other embodiments, the number of wings and the included angle between adjacent two wings can be increased or decreased adaptively according to actual needs, and at least one wing can be arranged.

[0038] In order to make the cyclone wellbore cleaning tool have higher ability to remove cuttings, the cyclone wellbore cleaning tool further comprises a nozzle. In this embodiment, a nozzle is arranged on each wing 2. Specifically, the wing 2 is divided into a rear wall section on the upper side and a thin wall section on the lower side along the axial direction of the tubular body 1, and the thin wall section constitutes a tail wing. The wing constitutes a shell of the nozzle, and the nozzle further comprises a jet flow channel opened on the thick wall section. In this embodiment, the jet flow channel is a T-shaped structure composed of two straight channel sections, specifically including a jet straight channel section 4 extending along the axial direction of the tubular body 1 and a communication straight channel section 5 extending along the radial direction of the tubular body. The communication straight channel section 5 penetrates the tubular body 1 and the wing 2, and is connected with the jet straight channel section 4 to realize the communication between the inner cavity of the tubular body and the jet straight channel section 4. The cyclone wellbore cleaning tool further comprises a plug 6 screwed in the end of the communication straight channel section 5 away from the inner cavity of the tubular body. In operation, the high-pressure fluid in the tubular body 1 enters the jet straight channel section 4 through the communication straight channel section 5 and is sprayed upward along the axial direction of the tubular body.

[0039] Based on the structure of the jet flow channel, the channel connecting the jet straight channel section 4 with the inner cavity of the tubular body can be machined from the outside after the wing 2 is fixed on the tubular body 1, so that the jet flow channel is easy to manufacture.

[0040] Since the borehole cleaning tool does not need to have a high enough debris removal capacity in all cases, the cyclone borehole cleaning tool in the present application further has a valve core assembly for controlling the on-off of the jet flow channel. Figure 2 As shown in the figure, the valve core assembly in the embodiment is a valve core assembly of a pure mechanical structure, which includes a valve seat 7, a push rod 9, a valve ball 10 and a spring 8. The valve seat 7 is arranged at the channel opening of the jet straight channel segment 4 close to the communication straight channel segment 5. The spring 8 is arranged in the jet straight channel segment 4 in a gap fit with the inner wall of the jet straight channel segment 4, i.e. in a top-bottom direction guide fit. The push rod 9 has a tubular plug-in fit segment as a section thereof, which is plug-in fit in the spring 8 in a guide fit. The push rod further includes a working section for cooperating with the valve ball 10. The part of the push rod 9 constituting the working section has a ring table 11 for stop fit with the spring 8, and further has a recess for cooperating with the valve ball 10. The recess as the valve core cooperating structure enables the push rod to be in stable push fit with the valve ball 10.

[0041] In order to realize over-flow, the working section has an over-flow gap for fluid flow between the working section and the inner wall of the jet straight channel segment 4, and the working section itself has a communication flow channel in communication with the inner cavity of the plug-in fit section of the push rod. The valve seat 7 is provided with a central hole for fluid flow, and the valve ball 10 as the valve core can block the central hole of the valve seat. In the embodiment, in order to ensure that the valve ball 10 is in close fit with the valve seat 7, the end of the valve seat 7 facing the valve ball 10 is of a tapered flared structure. The compression force of the spring 8 compressing the valve ball on the valve seat 7 can be adaptively set according to actual requirements, so that the valve core assembly can be opened at a set pressure.

[0042] In the embodiment, the outlet of the jet flow channel is provided with a spray cap 3, which is screwed in the jet flow channel and serves as a stop piece for the spring 8 to stop the end of the spring 8 away from the valve seat 7. When the valve core assembly is opened under pressure, the push rod 9 extends into the spray cap 3, guiding the high-pressure and high-speed fluid to directly flow into the flow channel of the nozzle, avoiding the impact of the high-pressure and high-speed fluid on the spring 8. In the embodiment, the end of the flow channel of the spray cap 3 close to the valve core assembly is of an outward-inward flared structure, which guides the end of the push rod 9 and throttles the fluid to be sprayed, improving the speed of the sprayed fluid. In the embodiment, the section of the jet straight channel segment 4 where the valve core assembly is installed constitutes a control straight channel segment for installing the valve core assembly. Arranging the valve core assembly in the straight channel segment extending along the pipe body axis can reduce the influence of gravity on the opening force difference between the valve core assemblies, ensuring that the fluid sprayed from each nozzle has as consistent a flow rate as possible. Of course, in other embodiments, the control straight channel segment can also be arranged in the communication straight channel segment 5.

[0043] For the structure of the wing, in this embodiment, the end surface of the wing 2, which is provided with the one end of the jet flow channel, is perpendicular to the axis of the pipe body 1, and the outlet of the jet flow channel is located on the upper end surface of the wing 2. The swirled wellhole cleaning tool is generally used in inclined wells and horizontal wells, so that the outlet of the jet flow channel has as small an angle as possible with the direction of gravity, thereby avoiding as much as possible the deposition of cuttings at the outlet of the jet flow channel to block the outlet of the jet flow channel.

[0044] The well wall of an oil well is prone to impact damage. In this embodiment, the specific structure of the nozzle is limited, specifically the angle of the axis of the nozzle outlet, and specifically, the angle between the jet flow jetted out of the nozzle outlet and the axis of the pipe body is defined as α. When the jet flow is obliquely jetted towards the well wall, α is positive, and the angle of jet flow along the axial direction of the pipe body is 0°. When the jet flow is obliquely jetted towards the pipe body, α is negative. In order to prevent the jet flow jetted out of the nozzle from causing damage to the well wall, α ≤ 0°. That is, the jet flow is either jetted along the axial direction of the pipe body or jetted towards the pipe body 1. In this embodiment, the jet flow is jetted along the axial direction of the pipe body.

[0045] In this embodiment, the radial dimension of each wing along the pipe body 1 enables the swirled wellhole cleaning tool to be used as a centralizer. When in operation, the swirled wellhole cleaning tool is lowered into the well along with the drill pipe and rotates along with the drill pipe to clean the cuttings bed deposited on the well wall in the well. The wing scrapes and grinds the cuttings, refines and disturbs the cuttings, so that the cuttings can flow along with the fluid in the well. The fluid carrying the cuttings flows out of the flow channel to form a swirled fluid, which carries the cuttings to the wellhead. When the rotation of the swirled wellhole cleaning tool cannot meet the cleaning requirement of the cuttings, the drill pipe is pressurized on the ground to increase the flow rate and pressure of the drilling fluid. When the pressure in the inner cavity of the pipe body 1 increases to a certain value, the high-pressure liquid in the jet flow channel pushes the valve plug away from the cooperation with the valve seat 7, so as to open the valve core assembly. When the high-pressure fluid passes through the flow passage, the communication flow channel, the inner cavity of the push rod, enters the flow channel of the jet cap 3, and is jetted out of the jet cap 3, the high-pressure jet flow jetted out assists the fluid carrying the cuttings in the swirled state flowing out of the flow channel, and the two work together to reliably carry the cuttings to the wellhead, thereby achieving the purpose of cleaning the cuttings bed in the wellbore.

[0046] In the above description, the axial direction of the pipe body is defined as the up-down direction, which is only for introducing the structure of the swirled wellhole cleaning tool and indicating the positional relationship between the structures, and does not limit or constrain the actual use state of the swirled wellhole cleaning tool.

[0047] The specific embodiment 2 of the swirled wellhole cleaning tool provided by the present application is mainly different from the embodiment 1 in that the valve core assembly in the embodiment 1 is a pure mechanical structure, and in this embodiment, a pressure sensor is arranged in the pipe body, and the valve core assembly is a valve that can be controlled to be opened after the pressure sensor sends a signal.

[0048] The specific embodiment 3 of the spiral flow wellbore cleaning tool provided by the application is mainly different from the embodiment 1 in that in the embodiment 1, the nozzles are arranged on the wings, and in the embodiment 3, the nozzles are arranged on the tube body on the upper side of the wings.

[0049] The specific embodiment 4 of the spiral flow wellbore cleaning tool provided by the application is mainly different from the embodiment 1 in that in the embodiment 4, the push rod is directly guided to slide with the inner wall of the jet flow channel.

[0050] The specific embodiment 5 of the spiral flow wellbore cleaning tool provided by the application is mainly different from the embodiment 1 in that in the embodiment 5, the upper end surface of the wing is a bevel with a non-90° angle with the axis of the tube body, and the outlet of the jet flow channel is arranged on the bevel.

[0051] The specific embodiment 6 of the spiral flow wellbore cleaning tool provided by the application is mainly different from the embodiment 1 in that in the embodiment 1, the nozzles are arranged on each wing, and in the embodiment 6, the nozzles are arranged on part of the wings.

[0052] The specific embodiment 7 of the spiral flow wellbore cleaning tool provided by the application is mainly different from the embodiment 1 in that the jet flow channel is directly arranged on the wall of the tube body, that is, the nozzles are arranged on the tube body.

[0053] The specific embodiment 8 of the spiral flow wellbore cleaning tool provided by the application is mainly different from the embodiment 1 in that in the embodiment 8, the nozzles spray the jet flow obliquely downward.

[0054] Finally, it should be noted that the above only describes the preferred embodiments of the application and is not used to limit the application, and although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments without creative labor, or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A vortex wellbore cleaning tool, comprising a tube body (1) and wings (2), wherein the upper and lower ends of the tube body (1) have connection structures for connecting to drill pipe, the wings (2) are located on the outer wall of the tube body (1), and the space along both sides of the tube body (1) forms a flow channel for fluid to flow through, the vortex wellbore cleaning tool also having a nozzle communicating with the inner cavity of the tube body, characterized in that, Define the angle between the jet ejected from the nozzle and the axis of the pipe (1) as α. α is positive when the jet is sprayed at an angle toward the well wall, 0° when sprayed along the axial direction of the pipe (1), and negative when sprayed at an angle toward the pipe (1). The angle α between the jet and the axis of the tube (1) is ≤0°; The nozzle includes a housing and a valve core assembly. The housing has an injection channel. The valve core assembly is disposed in the injection channel to control the opening and closing of the injection channel. The valve core assembly can be opened when the pressure inside the tube (1) reaches a set value. The valve core assembly includes a valve seat (7), a valve core, a push rod (9), and a spring (8). The valve seat (7) is fixed in the jet channel and has a central hole for fluid to pass through. The spring (8) is disposed in the jet channel. The push rod (9) includes an insert fitting section that fits into the spring (8) and an extension section that extends out of the spring (8). The extension section has a valve core fitting structure that stably pushes the valve core. The spring (8) pushes the valve core through the push rod (9) to block the central hole of the valve seat (7). The insert fitting section of the push rod (9) is tubular. There is a flow gap between the extension section and the inner wall of the jet channel, and the extension section has a connecting channel that connects the flow gap with the central hole of the insert fitting section.

2. The cyclone wellbore purification tool according to claim 1, characterized in that, The wing (2) has at least two, and each wing (2) is arranged at intervals along the circumference of the tube body (1), and the nozzle is provided on at least two of the wing (2).

3. The cyclone wellbore purification tool according to claim 2, characterized in that, The wing (2) is a flat plate structure whose length extends along the axial direction of the tube (1).

4. The cyclone wellbore purification tool according to claim 1, characterized in that, The jet channel is formed on the wing (2), and the wing (2) with the jet channel forms the housing of the nozzle.

5. The cyclone wellbore purification tool according to claim 1, characterized in that, The nozzle also includes a spray cap (3) located at the outlet of the jet channel. The spray cap (3) has a central hole for fluid ejection. The inner opening of the central hole is an flared structure. The push rod (9) can extend into the flared structure of the central hole of the spray cap (3) when the valve core assembly is opened.

6. The cyclone wellbore purification tool according to claim 1, characterized in that, The spring (8) is disposed in the jet channel with a clearance fit with the inner wall of the jet channel, and the insertion section of the push rod (9) is inserted into the spring (8) with a clearance fit.

7. The cyclone wellbore purification tool according to claim 1, characterized in that, The push rod (9) has an annular platform (11) that engages with the end stop of the spring (8), and the annular platform (11) is in clearance fit with the inner wall of the jet channel.

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