Nozzle assembly and oil pipe descaling spray head with same

Abstract

The embodiment of the utility model discloses a nozzle assembly and an oil pipe descaling spray head with the nozzle assembly, relates to the technical field of pipeline descaling equipment, and is convenient for providing enough spinning power and realizing 360-degree all-directional cleaning on the inner wall of an oil pipe, so that scales can be effectively stripped from or washed away from the inner wall of the oil pipe, and the descaling effect of the oil pipe is improved. Comprising a nozzle seat which is provided with a hollow cavity extending to one end and is further provided with a nozzle mounting hole communicated with the hollow cavity; the nozzle is mounted in the nozzle mounting hole, and the nozzle is provided with a spiral spraying hole penetrating through the two ends of a nozzle body. The descaling device is suitable for descaling the inner walls of pipelines such as oil pipes and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline descaling equipment, in particular to a nozzle assembly and an oil pipe descaling nozzle having the nozzle assembly. Background Art

[0002] The oil pipe is an important equipment in the process of oil and gas extraction. It connects oil and gas wells and ground facilities and is responsible for transporting oil and gas fluids. However, in the middle and late stages of oil and gas production, scaling often occurs on the inner wall of the oil pipe due to the presence of a certain amount of impurities such as water, salt, minerals, organic matter, microorganisms, etc. in the oil and gas fluids, as well as changes in the temperature, pressure, flow rate and other operating conditions of the oil and gas wells. That is, one or more layers of scale with different compositions, shapes and hardness are deposited on the inner wall of the oil pipe. Scaling of the oil pipe will cause the inner diameter of the oil pipe to decrease, increase the flow resistance of the oil and gas fluid, reduce the efficiency of oil and gas transportation, and affect the production capacity of the oil and gas wells. In severe cases, scaling of the oil pipe will also block the oil pipe, causing the oil and gas wells to stop production or be scrapped, bringing huge economic losses and safety hazards to oil and gas production.

[0003] In order to solve the problem of oil pipe scaling, the commonly used oil pipe scaling methods are chemical scaling and mechanical scaling. Chemical scaling refers to injecting a certain concentration of chemical agents into the oil pipe to make the scale react with the agent, thereby decomposing or dissolving the scale to achieve the purpose of scaling. Mechanical scaling refers to using mechanical equipment or tools, such as scrapers, pipe cleaners, high-pressure water jets, etc., to physically scrape or flush the inner wall of the oil pipe to peel off or flush away the scale from the inner wall of the oil pipe to achieve the purpose of scaling.

[0004] At present, for descaling equipment based on high-pressure water jets, for example, the spray hole of the descaling nozzle generally has a straight line axis, which is difficult to meet the needs of oil pipe descaling. There is an urgent need to develop a new type of oil pipe descaling nozzle. Utility Model Content

[0005] In view of this, an embodiment of the utility model provides a nozzle assembly and an oil pipe descaling nozzle having the nozzle assembly, which is convenient for providing sufficient spinning power to achieve 360° all-round cleaning of the inner wall of the oil pipe, thereby effectively peeling or flushing away scale from the inner wall of the oil pipe, thereby improving the oil pipe descaling effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, an embodiment of the utility model provides a nozzle assembly, comprising: a nozzle seat, the nozzle seat having a hollow cavity extending to one end, the nozzle seat also having a nozzle mounting hole communicating with the hollow cavity;

[0008] The nozzle is installed in the nozzle installation hole, and the nozzle has spiral spray holes running through two ends of the nozzle body.

[0009] Optionally, the spiral angle of the spiral spray hole is 25°~45°.

[0010] Optionally, a plurality of spiral spray holes are provided.

[0011] Optionally, there are three spiral spray holes, and they are not intersected with each other.

[0012] Optionally, at least two nozzle mounting holes are provided, at least one is provided in the circumferential direction of the nozzle seat, and at least one is provided in the axial direction of the nozzle seat.

[0013] Optionally, three, four, six or eight nozzle mounting holes are provided in the circumferential direction of the nozzle seat, and one nozzle mounting hole is provided in the axial direction of the nozzle seat.

[0014] Optionally, the nozzle mounting hole is a countersunk hole, and the nozzle is installed in the nozzle mounting hole and locked in the nozzle mounting hole with a hollow nut.

[0015] In a second aspect, an embodiment of the utility model provides an oil pipe descaling nozzle, comprising: a pipe joint, used to connect to a high-pressure fluid source, having a first hollow channel;

[0016] a sleeve, a first end of which is connected to the pipe joint;

[0017] A rotating tube, rotatably connected to the sleeve, and one end of which is butted with the first hollow channel of the pipe joint for transmitting high-pressure fluid;

[0018] A connector connects the rotating tube with any of the nozzle assemblies described in the first aspect and moves in accordance with the rotating tube, having a second hollow channel that communicates with the hollow cavity of the nozzle seat of the nozzle assembly.

[0019] Optionally, a sealing assembly is provided at the connection between the rotating tube and the pipe joint, and between the rotating tube and the sleeve;

[0020] A sealing pad is provided at the connection between the rotating tube and the connecting head, and a sealing ring is provided at the connection between the connecting head and the hollow cavity of the nozzle seat.

[0021] Optionally, a bearing group is provided between the rotating tube and the sleeve, for supporting the rotating tube and ensuring smooth rotation of the rotating tube.

[0022] The nozzle assembly and the oil pipe descaling nozzle having the nozzle assembly provided by the embodiment of the utility model, by setting the spray hole of the nozzle of the nozzle assembly as a spiral spray hole, when the high-pressure water flows out from the spiral spray hole through the hollow cavity to form multiple high-pressure jets, the force generated by the high-pressure jets includes axial component, radial component and tangential component, and the tangential component is sufficient to provide sufficient hydraulic torque to drive the nozzle assembly to rotate, that is, to provide sufficient spinning power, to achieve 360° all-round cleaning of the inner wall of the oil pipe, so that the scale can be effectively peeled off or washed away from the inner wall of the oil pipe, thereby improving the oil pipe descaling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic structural diagram of an embodiment of the nozzle assembly of the utility model;

[0025] Figure 2 for Figure 1 A schematic structural diagram of a nozzle embodiment in FIG.

[0026] Figure 3 for Figure 1 A schematic structural diagram of an embodiment of a nozzle holder;

[0027] Figure 4 for Figure 1 A schematic structural diagram of a locking nut embodiment;

[0028] Figure 5 This is a schematic structural diagram of an embodiment of the oil pipe descaling nozzle of the utility model;

[0029] Figure 6 for Figure 3 Middle AA section view. DETAILED DESCRIPTION

[0030] The following is a detailed description of the embodiments of the utility model in conjunction with the accompanying drawings, in which the same or similar components are represented by the same symbols. If there are any dimensions or ratios in the accompanying drawings, they are only for convenience of description and do not represent the actual dimensions and ratios.

[0031] It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] High-pressure water jet descaling technology has the characteristics of indirect contact impact removal of scale. Without hard contact with the pipe wall, the strong impact force generated by the high-pressure water jet is used to peel off the scale from the inner wall of the oil pipe through the wedge-splitting effect. The nozzle configuration is smaller and more suitable for complex scaling environments. It can safely and effectively remove scale with complex shapes and components. It is a direct and effective method for oil pipe descaling. In order to ensure that the inner wall of the oil pipe can be cleaned 360° in all directions, the high-pressure water jet formed by the high-pressure water jet descaling device is required to completely cover the inner wall of the oil pipe. This requires the high-pressure water jet device to at least provide self-spinning power.

[0033] See also Figures 1 to 4 The nozzle assembly 100 provided by the embodiment of the utility model is suitable for descaling the inner wall of a pipeline such as an oil pipe, and includes: a nozzle seat 1, the nozzle seat 1 having a hollow cavity extending to one end, and the nozzle seat 1 also having a nozzle mounting hole connected to the hollow cavity 11;

[0034] The nozzle 2 is installed in the nozzle installation hole, and the nozzle 2 has a spiral spray hole 21 that penetrates both ends of the nozzle 2 body. The nozzle 2 can be made of cemented carbide, which has a much higher hardness than steel and is resistant to erosion; moreover, cemented carbide has good corrosion resistance, and for the descaling nozzle working in a water environment, it not only avoids clogging caused by rust, but also facilitates maintenance and can increase the service life of the nozzle 2.

[0035] In this embodiment, by setting the spray hole of the nozzle 2 of the nozzle assembly 100 as a spiral spray hole 21, when working, the high-pressure fluid passes through the hollow cavity 11 of the nozzle seat 1 and then sprays out through the nozzle 2 to form multiple high-pressure jets. In the process of outward spraying, when the high-pressure water flows through the hollow cavity 11 and sprays out from the spiral spray hole 21 to form multiple high-pressure jets, the force generated by the high-pressure jet includes an axial component, a radial component and a tangential component, and the tangential component is sufficient to provide sufficient hydraulic torque to drive the nozzle 2 assembly 100 to rotate, that is, to provide sufficient self-spinning power to achieve 360° all-round cleaning of the inner wall of the oil pipe, so that the scale can be effectively peeled off or washed away from the inner wall of the oil pipe, and the oil pipe descaling effect is improved.

[0036] In some embodiments, the helical angle of the spiral spray hole 21 can be adjusted according to the requirement for the self-rotation speed. The larger the angle, the greater the radial shear stress of the jet and the higher the speed. In some embodiments, the helical angle of the spiral spray hole 21 is 25° to 45°.

[0037] The inventors have found through practical research that when the helix angle of the spiral spray hole 21 is 25°~45°, the optimal spray target distance from the nozzle 2 to the object to be cleaned should be 4 times the aperture of the nozzle 2. The helix angle can be adjusted within the range of 25°~45° according to the distance between the nozzle 2 outlet and the inner wall of the oil pipe. When the distance is smaller, a larger helix angle is adopted, and when the distance is larger, a smaller helix angle is adopted.

[0038] See also Figure 2 As shown, in some embodiments, a plurality of spiral spray holes 21 are provided. In this way, during high-pressure jet descaling, the flushing coverage area can be increased and the flushing efficiency can be improved.

[0039] Specifically, there are three spiral spray holes 21, and they are arranged without intersection. In this way, the high-pressure jets ejected outward through the multiple spiral spray holes 21 can increase the tangential component force generated, thereby facilitating the provision of sufficient spin power. The spiral spray holes 21 can also be provided with two or four according to specific needs.

[0040] See again Figure 1 , the nozzle mounting holes are provided with at least two, at least one is provided in the circumferential direction of the nozzle seat 1 (when the nozzle seat 1 is a cylindrical structure, that is, radial direction), and at least one is provided in the axial direction of the nozzle seat 1. Among them, a nozzle 2 is provided in the nozzle mounting hole, and the nozzle 2 is modified by a hard alloy fine grinding rod with a spiral inner cooling hole. In the process of forming multiple high-pressure jets, the radial nozzle is mainly used to remove the scale attached to the inner wall of the oil pipe, and the axial nozzle provides self-rotation power and preliminarily removes the scale that may be blocked in the front oil pipe. In addition, the force generated by the nozzle also includes radial force and tangential force, and the tangential force is sufficient to cause the nozzle assembly 100 to rotate as a whole.

[0041] Specifically, three, four, six or eight nozzle mounting holes are provided on the circumference of the nozzle holder 1, which can increase the coverage area of ​​flushing and improve flushing efficiency, and one nozzle mounting hole is provided in the axial direction of the nozzle holder 1. A nozzle 2 is installed in each nozzle mounting hole.

[0042] In some embodiments, the nozzle mounting hole is a countersunk hole, the nozzle 2 is installed in the nozzle mounting hole, and is locked in the nozzle mounting hole with a hollow nut 3 to prevent the nozzle 2 from detaching from the nozzle mounting hole.

[0043] In this embodiment, when the hollow nut 3 locks the nozzle 2 in the nozzle mounting hole, the nozzle 2 can be set in two states. One is that the nozzle 2 is locked and completely loses freedom and cannot move in the nozzle mounting hole. The other is that the nozzle 2 is locked but still has rotational freedom, that is, the nozzle 2 itself can be rotated relative to the nozzle seat 1. In this embodiment, this is not specifically limited.

[0044] See also Figure 5 and Figure 6 As shown, the utility model also provides an oil pipe descaling nozzle 200 according to an embodiment, comprising: a pipe joint 4, a sleeve 5, a rotating pipe 6 and a connector 7;

[0045] Wherein, the pipe joint 4 is used to connect to a high-pressure fluid source and has a first hollow channel 41;

[0046] A sleeve 5, a first end of which is connected to the pipe joint 4;

[0047] A rotating tube 6 is rotatably connected to the sleeve 5, and one end of the rotating tube 6 is connected to the first hollow channel 41 of the pipe joint 4 for transmitting high-pressure fluid;

[0048] The connector 7 connects the rotating tube 6 with the nozzle assembly 100 described in any of the aforementioned embodiments, and has a second hollow channel that is consistent with the movement state of the rotating tube 6 and is connected to the hollow cavity 11 of the nozzle seat 1 of the nozzle assembly 100.

[0049] During operation, the high-pressure fluid enters the interior of the rotating tube 6 from the first hollow channel of the pipe joint 4, and enters the hollow cavity 11 of the nozzle 2 assembly 100 through the rotating tube 6 and the second hollow channel of the connector, and then is ejected through the nozzle 2 to form multiple high-pressure jets. During the jetting process, the force generated by the jet includes axial force, radial force and tangential force, wherein the tangential force is sufficient to provide self-rotation torque, driving the nozzle assembly 100 and the rotating tube 6 connected to the nozzle assembly 100 to rotate together, achieving 360° jetting, so that the liquid ejected from each nozzle 2 can be sprayed and cleaned in all directions on the inner wall of the oil pipe. Since the formed high-pressure water jet can completely cover the inner wall of the oil pipe, it is conducive to effectively peeling or flushing away the scale from the inner wall of the oil pipe, thereby improving the oil pipe descaling effect.

[0050] Specifically, the high-pressure spiral jet ejected from the radially arranged nozzle mainly plays a cleaning role; the high-pressure spiral jet ejected from the axial nozzle not only plays a cleaning role, but its tangential component also generates a rotational torque, which is sufficient to drive the rotating tube 6, the connecting head 7 and the nozzle assembly 100 to rotate together.

[0051] In some embodiments, a sealing assembly 8 is provided at the connection between the rotating tube 6 and the pipe joint 4, and between the rotating tube 6 and the sleeve 5 to achieve a sealing effect.

[0052] A sealing gasket 9 is provided at the connection between the rotating tube 6 and the connecting head 7 , and a sealing ring 10 is provided at the connection between the connecting head 7 and the hollow cavity 11 of the nozzle holder 1 to achieve a sealing effect.

[0053] Specifically, a bearing group 12 is provided between the rotating tube 6 and the sleeve 5 to support the rotating tube 6 and ensure smooth rotation of the rotating tube 6 .

[0054] In order to more clearly illustrate the specific structure and working principle of the utility model, the following Figure 5 and 6 An optional embodiment of the utility model is described in detail. In this optional embodiment, the nozzle assembly 100 includes a nozzle seat 1, four nozzles 2 and four hollow nuts 3; the oil pipe descaling nozzle 200 includes a pipe joint 4, a sleeve 5, a rotating tube 6, a connector 7, and some sealing components and bearing groups.

[0055] See also Figures 1 to 4 The nozzle holder 1 is a cylindrical structure with a hollow cavity 11 extending to both ends. Four nozzle mounting holes are provided on the circumference of the nozzle holder 1, which are respectively located in the upper, lower, left and right directions of the nozzle holder 1 and communicated with the hollow cavity 11. A nozzle mounting hole is provided in the axial direction of the nozzle holder 1, which is located at the closed end of the nozzle holder 1 and communicated with the hollow cavity 11. The nozzle mounting holes are all countersunk holes, which are convenient for installing the nozzle 2.

[0056] The nozzle 2 is a boss-shaped structure, which matches the inner wall of the nozzle mounting hole, and the other end is a plane, which contacts the end face of the hollow nut 3. The nozzle 2 has a spiral spray hole 21 that runs through both ends of the nozzle 2 body, and the spiral angle is 30°. The nozzle 2 is made of cemented carbide, which has high hardness and corrosion resistance, and can withstand the impact of high-pressure water flow and the friction of the inner wall of the oil pipe.

[0057] The hollow nut 3 is a cylindrical structure with hollow holes penetrating through both ends of the hollow nut body. The nozzle 2 is installed in the hollow hole, and the stepped surface of the hollow nut 3 contacts the upper end surface of the nozzle installation hole, so as to lock the nozzle 2 in the nozzle installation hole.

[0058] The pipe joint 4 is a generally cylindrical structure, one end of which is open and the other end is closed, and has a first hollow channel 41 that runs through both ends of the pipe joint 4. The open end of the pipe joint 4 is used to connect to a high-pressure fluid source, and the closed end of the pipe joint 4 is connected to the first end of the sleeve 5 by a thread. In order to improve the sealing of the connection, a sealing ring can be provided at the connection.

[0059] The sleeve 5 is a cylindrical structure with openings at both ends, and has a hollow passage that passes through both ends of the sleeve 5. The first end of the sleeve 5 is connected to the closed end of the pipe joint 4, and the second end of the sleeve 5 is in contact with the outer wall of the rotating tube 6.

[0060] The rotating tube 6 is a cylindrical structure with openings at both ends, and has hollow passages that penetrate the two ends of the rotating tube 6. One end of the rotating tube 6 is rotatably connected to the sleeve 5 and docked with the first hollow passage 41 of the pipe joint 4 for transmitting high-pressure fluid. The other end of the rotating tube 6 is connected to one end of the connector 7.

[0061] The connector 7 is a cylindrical structure, both ends of which are open, and has a second hollow channel that passes through both ends of the connector 7. One end of the connector 7 is connected to the other end of the rotating tube 6, and the other end of the connector 7 is connected to the open end of the nozzle holder 1 of the nozzle assembly 100 and communicates with the hollow cavity 11 of the nozzle holder 1.

[0062] A sealing assembly is provided at the connection between the rotating tube 6 and the pipe joint 4, and between the rotating tube 6 and the sleeve 5, to prevent leakage of high-pressure fluid and entry of impurities. A sealing gasket is provided at the connection between the rotating tube 6 and the connector 7, and a sealing ring is provided at the connection between the connector 7 and the hollow cavity 11 of the nozzle holder 1, to enhance the sealing performance. A bearing group is provided between the rotating tube 6 and the sleeve 5, to support the rotating tube 6 and ensure smooth rotation of the rotating tube 6.

[0063] When the high-pressure fluid source provides high-pressure fluid to the pipe joint 4, the high-pressure fluid enters the interior of the rotating tube 6 through the first hollow channel 41 of the pipe joint 4, and enters the hollow cavity 11 of the nozzle assembly 100 through the second hollow channel of the rotating tube 6 and the connector 7. When the high-pressure fluid is ejected from the hollow cavity 11 of the nozzle assembly 100 through the spiral spray hole 21 of the nozzle 2, multiple high-pressure jets are formed. Due to the setting of the spiral angle of the spiral spray hole 21 of the nozzle 2, the force generated by the high-pressure jet includes an axial component, a radial component and a tangential component. The tangential component is sufficient to provide sufficient hydraulic torque to drive the nozzle assembly 100 and the rotating tube 6 and the connector 7 connected to the nozzle assembly 100 to rotate together, that is, to provide sufficient self-spinning power. Due to the rotation of the nozzle assembly 100 and the rotating tube 6, the high-pressure jet can clean the inner wall of the oil pipe 360° in all directions, thereby effectively stripping or flushing away the scale from the inner wall of the oil pipe, and improving the oil pipe descaling effect.

[0064] Specifically, the high-pressure spiral jets ejected from the four radial nozzles, namely, the upper, lower, left and right ones, mainly play a cleaning role; the high-pressure spiral jet ejected from an axial nozzle not only plays a cleaning role, but its tangential force also generates a rotational torque, which drives the rotating tube 6, the connecting head 7 and the nozzle assembly 100 to rotate together, thereby achieving 360° all-round cleaning of the inner wall of the oil pipe, thereby effectively stripping or flushing away the scale from the inner wall of the oil pipe, and improving the oil pipe descaling effect.

[0065] According to the above description, the present invention may have other embodiments, which will not be described in detail. For example, the number and position of the nozzle mounting holes of the nozzle assembly 100 may be adjusted as needed, and the number and spiral angle of the spiral spray holes 21 of the nozzle 2 may also be adjusted as needed.

[0066] In summary, the oil pipe descaling nozzle provided in the embodiment of the utility model is based on high-pressure jet technology and improves the structure of the nozzle 2, which can achieve multi-directional and multi-stream injection, and the jet coverage range is wide, which can greatly improve the oil pipe cleaning efficiency.

[0067] It should be noted that, in this article, the terms "upper", "lower" and other terms indicating orientation or positional relationship are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. Relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the phrase "comprising a ..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements. For ordinary technicians in this field, it can be understood by specific circumstances.

[0068] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A nozzle assembly, characterized in that: include: A nozzle seat, the nozzle seat having a hollow cavity extending to one end, and the nozzle seat also having a nozzle mounting hole communicating with the hollow cavity; The nozzle is installed in the nozzle installation hole, and the nozzle has spiral spray holes running through two ends of the nozzle body.

2. The nozzle assembly according to claim 1, characterized in that The spiral angle of the spiral spray hole is 25° to 45°.

3. The nozzle assembly according to claim 1 or 2, characterized in that: The spiral spray holes are provided in plurality.

4. The nozzle assembly according to claim 1 or 2, characterized in that: The spiral spray holes are provided with three and are not intersected with each other.

5. The nozzle assembly according to claim 1 or 2, characterized in that: The nozzle mounting holes are provided with at least two holes, at least one of which is provided in the circumferential direction of the nozzle seat, and at least one of which is provided in the axial direction of the nozzle seat.

6. The nozzle assembly according to claim 5, characterized in that The nozzle seat is provided with three, four, six or eight nozzle mounting holes in the circumferential direction, and is provided with one nozzle mounting hole in the axial direction of the nozzle seat.

7. The nozzle assembly according to claim 1, characterized in that The nozzle mounting hole is a countersunk hole, the nozzle is mounted in the nozzle mounting hole, and is locked in the nozzle mounting hole by a hollow nut.

8. An oil pipe descaling nozzle, characterized in that: include: A pipe joint, used for connecting to a high-pressure fluid source, having a first hollow channel; a sleeve, a first end of which is connected to the pipe joint; A rotating tube, rotatably connected to the sleeve, and one end of which is butted with the first hollow channel of the pipe joint for transmitting high-pressure fluid; A connector connects the rotating tube to the nozzle assembly according to any one of claims 1 to 7 and has a second hollow channel that is consistent with the movement state of the rotating tube and is communicated with the hollow cavity of the nozzle seat of the nozzle assembly.

9. The oil pipe descaling nozzle according to claim 8, characterized in that: The rotating tube and the pipe joint, as well as the connection between the rotating tube and the sleeve are provided with a sealing assembly; A sealing pad is provided at the connection between the rotating tube and the connecting head, and a sealing ring is provided at the connection between the connecting head and the hollow cavity of the nozzle seat.

10. The oil pipe descaling nozzle according to claim 8, characterized in that: A bearing group is arranged between the rotating tube and the sleeve, which is used to support the rotating tube and ensure smooth rotation of the rotating tube.

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