A hollow sphere separation device

Abstract

The application relates to a hollow ball separating device and belongs to the technical field of drilling tools. The device comprises an outer shell, a first separating mechanism and a second separating mechanism are sequentially arranged in the outer shell along the flowing direction of drilling fluid; the first separating mechanism comprises a spherical metal filter screen, a first separating port is arranged at the position close to the spherical metal filter screen of the outer shell; a leakage flow channel flowing towards the second separating mechanism is formed between the first separating mechanism and the outer shell; the second separating mechanism comprises a tower type filter screen arranged at the outlet side of the leakage flow channel, and a second separating port is arranged at the position close to the tower type filter screen of the outer shell. The hollow ball separating device can improve the separation efficiency of hollow balls by arranging two-stage separating mechanisms, and the first separating mechanism and the second separating mechanism are communicated through the leakage flow channel, so that the separation efficiency of hollow balls is ensured.

Description

Technical Field

[0001] This application relates to the field of drilling tool technology, and in particular to a hollow sphere separation device. Background Technology

[0002] In deepwater drilling, the complex temperature field created by the low temperature of seawater and the high temperature of the formation, along with the narrow pressure window resulting from high pore pressure and low fracture pressure, frequently leads to complex downhole situations such as overflow, gas intrusion, or leakage. Domestic scholars have innovatively proposed a new concept: multi-gradient controlled pressure drilling. The basic principle of this technology is to separate low-density hollow spheres from the drilling fluid within the drill string using a downhole separator and inject them into the annulus. Using the separator as a reference point, the upper annulus contains a low-density fluid formed by the mixture of the hollow spheres and the drilling fluid, while the lower annulus contains the original drilling fluid, thus creating two density gradients within the annulus. By installing multiple separators on the drill string for multi-point separation, multiple density gradients can be formed within the annulus. Then, based on the narrow pressure window characteristic, the multi-gradient parameters are adjusted to ensure that the wellbore pressure remains within the pressure window, ultimately achieving safe and efficient drilling operations. Its significant advantage lies in better control of the wellbore pressure profile, which helps simplify the wellbore structure. However, existing separators are not very efficient at separating hollow spheres, preventing them from smoothly entering the upper annulus. Furthermore, due to the poor separation effect on hollow spheres, there is a risk of blockage in the separation channels during the separation process, leading to pressure buildup inside the separator and potentially causing drilling risks. Summary of the Invention

[0003] This application provides a hollow sphere separation device to solve the problem that existing separation devices have low separation efficiency for hollow spheres in related technologies.

[0004] This application provides a hollow sphere separation device, comprising:

[0005] The outer casing contains a first separation mechanism and a second separation mechanism arranged sequentially along the drilling fluid flow direction.

[0006] The first separation mechanism includes a spherical metal filter screen, and a first separation port is provided on the outer shell near the spherical metal filter screen;

[0007] A discharge channel is formed between the first separation mechanism and the outer casing, allowing flow towards the second separation mechanism;

[0008] The second separation mechanism includes a tower-shaped filter screen disposed on the outlet side of the discharge channel, and a second separation port is provided on the outer shell near the tower-shaped filter screen.

[0009] In some embodiments, a ball seat is provided at one end of the spherical metal filter screen, and a support spring is provided at the downstream end of the ball seat. One end of the support spring is fixed to the ball seat, and the other end is fixed to a spring seat.

[0010] In some embodiments, the second separation mechanism further includes a nozzle disposed downstream of the ball seat, and the spring seat is fixed to the nozzle.

[0011] In some embodiments, an annular wall is provided in the inner cavity of the outer shell, and a boss is provided at one end of the annular wall near the nozzle. An oblique jet hole is provided at one end of the boss near the tower-shaped filter screen, and the jet hole is connected to the discharge channel.

[0012] In some embodiments, the ball seat has a central hole and a plurality of through holes arranged circumferentially along the central hole.

[0013] In some embodiments, the spherical metal filter screen is provided with a supporting metal ball core, and the metal ball core is provided with a flow hole matching the central hole.

[0014] In some embodiments, the jet orifice is connected in a through connection with the second separation port.

[0015] In some embodiments, a sealing ring is provided between the ball seat and the annular wall.

[0016] In some embodiments, the boss is provided with a plurality of injection holes in a circular pattern, the boss is fixed to the spring seat, and the spring seat has a through hole at its center.

[0017] In some embodiments, the pore size of both the spherical metal filter and the tower-shaped filter is smaller than the diameter of the hollow sphere.

[0018] The beneficial effects of the technical solution provided in this application include:

[0019] This application provides a hollow sphere separation device, including an outer shell. A first separation mechanism and a second separation mechanism are sequentially arranged inside the outer shell along the drilling fluid flow direction. The first separation mechanism includes a spherical metal filter screen, and a first separation port is provided on the outer shell near the spherical metal filter screen. A discharge channel is formed between the first separation mechanism and the outer shell, flowing towards the second separation mechanism. The second separation mechanism includes a tower-shaped filter screen disposed on the outlet side of the discharge channel, and a second separation port is provided on the outer shell near the tower-shaped filter screen.

[0020] In operation, a first separation mechanism and a second separation mechanism are sequentially arranged within the outer casing along the drilling fluid flow direction. The first separation mechanism includes a spherical metal filter screen. A first separation port is located near the spherical metal filter screen on the outer casing. When the mixture of drilling fluid and hollow spheres reaches the spherical metal filter screen, the hollow spheres are blocked by the filter screen, achieving the first separation. At this point, some hollow spheres enter the annulus through the first separation port, completing the separation. The remaining hollow spheres flow to the second separation mechanism through the discharge channel. The second separation mechanism includes a tower-shaped filter screen located on the outlet side of the discharge channel. The tower-shaped filter screen further blocks the hollow spheres, allowing them to enter the annulus through the second separation port, completing the second separation. This hollow sphere separation device, by setting up two-stage separation mechanisms, can improve the separation efficiency of hollow spheres. Furthermore, by connecting the first and second separation mechanisms through the discharge channel, it can prevent blockage of hollow spheres during separation, thereby ensuring the separation efficiency of hollow spheres. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the device structure provided in the embodiments of this application;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure at the first separation mechanism;

[0024] Figure 3 for Figure 2 A cross-sectional view of the center ball seat along the AA direction.

[0025] Figure label:

[0026] 1. Upper connector; 2. Outer shell; 3. Sealing ring; 4. Spring seat; 5. Boss; 6. Jet hole; 7. Screw; 8. Lower connector; 9. Lower connector inner cavity; 10. Base through hole; 11. Base; 12. Tower-shaped filter screen; 13. Second separation port; 14. Nozzle; 15. Jet channel; 16. Support spring; 17. Drain channel; 18. First separation port; 19. Spherical metal filter screen; 20. Metal ball core; 21. Groove structure; 22. Threaded structure; 23. Center hole; 24. Ball seat; 25. Through hole; 26. Annular wall. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] This application provides a hollow sphere separation device that can solve the problem of low separation efficiency of existing separation devices for hollow spheres in related technologies.

[0029] See Figures 1 to 3 As shown, this application provides a hollow sphere separation device, including an outer shell 2. A first separation mechanism and a second separation mechanism are sequentially arranged inside the outer shell 2 along the drilling fluid flow direction. The first separation mechanism includes a spherical metal filter screen 19, and a first separation port 18 is provided on the outer shell 2 near the spherical metal filter screen 19. A discharge channel 17 is formed between the first separation mechanism and the outer shell 2, flowing towards the second separation mechanism. The second separation mechanism includes a tower-shaped filter screen 12 disposed on the outlet side of the discharge channel 17, and a second separation port 13 is provided on the outer shell 2 near the tower-shaped filter screen 12.

[0030] In use, a first separation mechanism and a second separation mechanism are sequentially arranged inside the outer casing 2 along the drilling fluid flow direction. The first separation mechanism includes a spherical metal filter screen 19. A first separation port 18 is provided near the spherical metal filter screen 19 on the outer casing 2. When the mixture of drilling fluid and hollow spheres reaches the spherical metal filter screen 19, the hollow spheres are blocked by the spherical metal filter screen 19, achieving the first separation. At this time, some hollow spheres will enter the annulus, that is, the space set around the outer casing 2, through the first separation port 18, and complete the separation. Other hollow spheres will flow with the drilling fluid through the discharge channel 17 to the second separation mechanism. The second separation mechanism includes a tower-shaped filter screen 12 set on the outlet side of the discharge channel 17. With the help of the tower-shaped filter screen 12, the hollow spheres are blocked and separated for the second time, so that the remaining hollow spheres enter the annulus through the second separation port 13, completing the second separation. This hollow sphere separation device improves the separation efficiency of hollow spheres by setting up a two-stage separation mechanism. Furthermore, the first and second separation mechanisms are connected through the discharge channel 17, which prevents the hollow spheres from getting blocked during separation, thereby ensuring the separation efficiency of hollow spheres.

[0031] In some practical applications, such as Figure 1The pore sizes of both the spherical metal filter 19 and the tower-shaped filter 12 are smaller than the diameter of the hollow sphere. This ensures effective blocking of the hollow sphere and guarantees that when the drilling fluid and the hollow sphere mixture encounters the spherical metal filter 19 and the tower-shaped filter 12, the hollow sphere is successfully separated, ensuring the normal flow of the drilling fluid. Furthermore, in some applications, the spherical metal filter 19 can be formed by welding two hemispherical filter screens together.

[0032] The upper connector 1 is connected to the upper housing 2 in the upstream direction, and the lower connector 8 is connected to the lower housing 2 in the downstream direction. In actual use, the upper connector 1 and the lower connector 8 are connected to the housing 2 by male and female snap fasteners.

[0033] In some alternative embodiments, such as Figure 2 and Figure 3 A ball seat 24 is provided at one end of the spherical metal filter 19, and a support spring 16 is provided at the downstream end of the ball seat 24. One end of the support spring 16 is fixed to the ball seat 24, and the other end is fixed to the spring seat 4. A metal ball core 20 for support is provided inside the spherical metal filter 19, and a flow hole matching the center hole 23 is opened on the metal ball core 20. A groove structure 21 is opened on the lower end face of the ball seat 24, the upper end of the support spring 16 is located in the groove structure 21, and the other end of the support spring 16 is located in the upper groove of the spring seat 4. In use, the upper part of the ball seat 24 is provided with a hemispherical concave surface for matching the spherical metal filter 19.

[0034] In use, a first separation mechanism and a second separation mechanism are sequentially arranged inside the outer casing 2 along the direction of drilling fluid flow. The first separation mechanism includes a spherical metal filter screen 19. A first separation port 18 is provided on the outer casing 2 near the spherical metal filter screen 19. When the mixed fluid of drilling fluid and hollow spheres reaches the spherical metal filter screen 19, the hollow spheres are blocked by the spherical metal filter screen 19, achieving the first separation. At this time, some hollow spheres will enter the annulus through the first separation port 18, completing the separation.

[0035] A ball seat 24 is provided at one end of the spherical metal filter screen 19, and a support spring 16 is provided at the downstream end of the ball seat 24. When the hollow ball is separated, if the hollow ball tends to block the spherical metal filter screen 19, the spherical metal filter screen 19, the metal ball core 20 and the ball seat 24 will compress the support spring 16 under the action of fluid pressure, so that the support spring 16 moves along the drilling fluid flow direction, thereby expanding the size of the first separation port 18. Under the combined action of fluid impact disturbance and hydraulic pressure, the hollow ball can pass smoothly through the first separation port 18, thereby avoiding the hollow ball from blocking the spherical metal filter screen 19 and the first separation port 18, and ensuring effective separation.

[0036] In some optional embodiments, the second separation mechanism further includes a nozzle 14 disposed downstream of the ball seat 24, and a spring seat 4 fixed to the nozzle 14. The spring seat 4 and the nozzle 14 are coaxially connected by a threaded structure 22. An annular wall 26 is provided in the inner cavity of the outer shell 2, and a boss 5 is provided at one end of the annular wall 26 near the nozzle 14. An injection hole 6 is obliquely opened at one end of the boss 5 near the tower-shaped filter screen 12, and the injection hole 6 is connected to the discharge channel 17. In actual use, the ball seat 24 is provided with a central hole 23 and a plurality of through holes 25 arranged circumferentially along the central hole 23. In actual use, the injection hole 6 is connected to the second separation port 13. The tower-shaped filter screen 12 can be fixedly installed between the base 11 and the stepped surface of the lower connector cavity 9 by screws 7. At the same time, a base through hole 10 is provided in the center of the base 11. When the drilling fluid flows, it passes through the tower-shaped filter screen 12, the base through hole 10 and the lower connector cavity 9 in sequence.

[0037] In use, a first separation mechanism and a second separation mechanism are sequentially arranged inside the outer casing 2 along the drilling fluid flow direction. The first separation mechanism includes a spherical metal filter screen 19. A first separation port 18 is provided on the outer casing 2 near the spherical metal filter screen 19. When the mixture of drilling fluid and hollow spheres reaches the spherical metal filter screen 19, the hollow spheres are blocked by the spherical metal filter screen 19, achieving the first separation. At this time, some hollow spheres will enter the annulus through the first separation port 18 to complete the separation. Other hollow spheres will flow to the second separation mechanism through the discharge channel 17. The second separation mechanism includes a tower-shaped filter screen 12 provided on the outlet side of the discharge channel 17. With the help of the tower-shaped filter screen 12, the hollow spheres are blocked for the second time and enter the annulus through the second separation port 13 to complete the second separation. This hollow sphere separation device improves the separation efficiency of hollow spheres by setting up a two-stage separation mechanism. Furthermore, the first and second separation mechanisms are connected through the discharge channel 17, which prevents the hollow spheres from getting blocked during separation, thereby ensuring the separation efficiency of hollow spheres.

[0038] The first separation mechanism includes a spherical metal filter screen 19. A first separation port 18 is provided on the outer shell 2 near the spherical metal filter screen 19. When the mixture of drilling fluid and hollow spheres reaches the spherical metal filter screen 19, the hollow spheres are blocked by the spherical metal filter screen 19, achieving the first separation. At this time, some hollow spheres will enter the annulus through the first separation port 18 to complete the separation. When the mixture of drilling fluid and hollow spheres reaches the first separation mechanism, after the hollow spheres are initially separated, some drilling fluid can flow through the central hole 23 and through hole 25 of the ball seat 24, and be sprayed into the direction of the tower-shaped filter screen 12 through the injection channel 15 opened in the middle of the nozzle 14. Under the impact of the drilling fluid flow, the hollow spheres mixed in can be separated a second time at the tower-shaped filter screen 12.

[0039] Furthermore, an annular wall 26 is provided inside the cavity of the outer shell 2. A boss 5 is provided at one end of the annular wall 26 near the nozzle 14. An injection hole 6 is obliquely opened at the end of the boss 5 near the tower-shaped filter screen 12. The injection hole 6 is inclined towards the tower-shaped filter screen 12. After the first separation is completed by the first separation mechanism, the mixed fluid of drilling fluid and hollow ball is ejected from the injection hole 6 through the first separation port 18 and the discharge channel 17. At this time, a large injection kinetic energy can be generated. In addition, the drilling fluid relies on the injection flow at the injection channel 15 opened in the middle of the nozzle 14, which enables the hollow ball to reach the second separation mechanism smoothly under the injection action of the two fluids. The second separation mechanism includes a tower-shaped filter screen 12 set on the outlet side of the discharge channel 17. With the help of the tower-shaped filter screen 12, the hollow ball is blocked for the second time and enters the annular space through the second separation port 13 to complete the second separation. This hollow sphere separation device improves the separation efficiency of hollow spheres by setting up a two-stage separation mechanism. Furthermore, the first and second separation mechanisms are connected through the discharge channel 17, which prevents the hollow spheres from getting blocked during separation, thereby ensuring the separation efficiency of the hollow spheres.

[0040] In some optional embodiments, the boss 5 is provided with multiple injection holes in a circular pattern. The boss 5 is fixed to the spring seat 4, and the spring seat 4 has a through hole 25 at its center. The arrangement of the injection holes and the through hole 25 ensures that after the hollow ball completes the initial separation through the first separation mechanism, the fluid can smoothly reach the location of the second separation mechanism and generate a certain amount of injection kinetic energy, which helps to achieve the second separation and ensures the separation efficiency.

[0041] In some optional embodiments, a sealing ring 3 is provided between the ball seat 24 and the annular wall 26, and a sealing ring 3 is also provided between the spring seat 4 and the annular wall 26. The provision of the sealing ring 3 can ensure the reliability between the structures and avoid affecting the separation efficiency.

[0042] In summary, the hollow sphere separation device includes an outer shell 2, inside which a first separation mechanism and a second separation mechanism are sequentially arranged along the drilling fluid flow direction; the first separation mechanism includes a spherical metal filter screen 19, and a first separation port 18 is provided on the outer shell 2 near the spherical metal filter screen 19; a discharge channel 17 is formed between the first separation mechanism and the outer shell 2, flowing towards the second separation mechanism; the second separation mechanism includes a tower-shaped filter screen 12 provided on the outlet side of the discharge channel 17, and a second separation port 13 is provided on the outer shell 2 near the tower-shaped filter screen 12.

[0043] In use, a first separation mechanism and a second separation mechanism are sequentially arranged inside the outer casing 2 along the drilling fluid flow direction. The first separation mechanism includes a spherical metal filter screen 19. A first separation port 18 is provided on the outer casing 2 near the spherical metal filter screen 19. When the mixture of drilling fluid and hollow spheres reaches the spherical metal filter screen 19, the hollow spheres are blocked by the spherical metal filter screen 19, achieving the first separation. At this time, some hollow spheres will enter the annulus through the first separation port 18, completing the separation. A ball seat 24 is provided at one end of the spherical metal filter screen 19, and a support spring 16 is provided at the downstream end of the ball seat 24. One end of the support spring 16 is fixed to the ball seat 24, and the other end is fixed to the spring seat 4. When the hollow spheres tend to clog the spherical metal filter screen 19 during separation, the spherical metal filter screen 19, the core, and the seat 24 will compress the support spring 16 under the action of fluid pressure. This causes the support spring 16 to move along the drilling fluid flow direction, thereby expanding the size of the first separation port 18. Under the combined action of fluid impact disturbance and hydraulic pressure, the hollow spheres can pass smoothly through the first separation port 18, thus preventing the hollow spheres from clogging the spherical metal filter screen 19 and the first separation port 18, and ensuring effective separation.

[0044] When the hollow spheres are blocked by the spherical metal filter screen 19, the first separation is achieved. At this time, some hollow spheres will enter the annulus through the first separation port 18 to complete the separation. Other hollow spheres will flow to the second separation mechanism through the discharge channel 17. The second separation mechanism includes a tower-shaped filter screen 12 set on the outlet side of the discharge channel 17. With the help of the tower-shaped filter screen 12, the hollow spheres are blocked for the second time and enter the annulus through the second separation port 13 to complete the second separation.

[0045] At this time, the second separation mechanism also includes a nozzle 14 located downstream of the ball seat 24, and a spring seat 4 fixed to the nozzle 14. An annular wall 26 is provided inside the outer shell 2. A boss 5 is provided at one end of the annular wall 26 near the nozzle 14. A jet hole 6 is obliquely opened at the end of the boss 5 near the tower-shaped filter screen 12, and the jet hole 6 is connected to the discharge channel 17. In actual use, the ball seat 24 has a central hole 23 and multiple through holes 25 arranged circumferentially along the central hole 23. In actual use, the jet hole 6 is connected to the second separation port 13.

[0046] Furthermore, an annular wall 26 is provided inside the cavity of the outer shell 2. A boss 5 is provided at one end of the annular wall 26 near the nozzle 14. An injection hole 6 is obliquely opened at the end of the boss 5 near the tower-shaped filter screen 12. The injection hole 6 is inclined towards the tower-shaped filter screen 12. After the first separation is completed by the first separation mechanism, the mixed fluid of drilling fluid and hollow ball is ejected from the injection hole 6 through the first separation port 18 and the discharge channel 17. At this time, a large injection kinetic energy can be generated. In addition, the drilling fluid relies on the injection flow at the injection channel 15 opened in the middle of the nozzle 14, which enables the hollow ball to reach the second separation mechanism smoothly under the injection action of the two fluids. The second separation mechanism includes a tower-shaped filter screen 12 set on the outlet side of the discharge channel 17. With the help of the tower-shaped filter screen 12, the hollow ball is blocked for the second time and enters the annular space through the second separation port 13 to complete the second separation. This hollow sphere separation device improves the separation efficiency of hollow spheres by setting up a two-stage separation mechanism. Furthermore, the first and second separation mechanisms are connected through the discharge channel 17, which prevents the hollow spheres from getting blocked during separation, thereby ensuring the separation efficiency of hollow spheres.

[0047] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0048] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A hollow sphere separation device, characterized in that, include: The outer shell (2) has a first separation mechanism and a second separation mechanism arranged sequentially inside the outer shell (2) along the drilling fluid flow direction; The first separation mechanism includes a spherical metal filter screen (19), and the outer shell (2) is provided with a first separation port (18) near the spherical metal filter screen (19). A discharge channel (17) is formed between the first separation mechanism and the outer shell (2) to flow toward the second separation mechanism. The second separation mechanism includes a tower-shaped filter screen (12) disposed on the outlet side of the discharge channel (17), and a second separation port (13) is provided on the outer shell (2) near the tower-shaped filter screen (12). A ball seat (24) is provided at one end of the spherical metal filter screen (19), and a support spring (16) is provided at the downstream end of the ball seat (24). One end of the support spring (16) is fixed to the ball seat (24), and the other end is fixed to the spring seat (4). The second separation mechanism also includes a nozzle (14) disposed downstream of the ball seat (24), and the spring seat (4) is fixed to the nozzle (14). The inner cavity of the outer shell (2) is provided with an annular wall (26), and a boss (5) is provided at one end of the annular wall (26) near the nozzle (14). The boss (5) is obliquely provided with a jet hole (6) at one end near the tower-shaped filter screen (12), and the jet hole (6) is connected to the discharge channel (17). The ball seat (24) has a central hole (23) and a plurality of through holes (25) arranged circumferentially along the central hole (23).

2. The hollow sphere separation device as described in claim 1, characterized in that: The spherical metal filter screen (19) is provided with a metal ball core (20) for support, and the metal ball core (20) is provided with a flow hole matching the central hole (23).

3. The hollow sphere separation device as described in claim 1, characterized in that: The jet hole (6) is connected to the second separation port (13).

4. The hollow sphere separation device as described in claim 1, characterized in that: A sealing ring (3) is provided between the ball seat (24) and the annular wall (26).

5. The hollow sphere separation device as described in claim 1, characterized in that: The boss (5) is provided with multiple spray holes in a circular pattern. The boss (5) is fixed to the spring seat (4). The spring seat (4) has a through hole in the center.

6. The hollow sphere separation device as described in claim 1, characterized in that: The pore sizes of the spherical metal filter (19) and the tower-shaped filter (12) are both smaller than the diameter of the hollow sphere.

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