Sand-prevention filtering gas production wellhead device and Christmas tree

Abstract

The invention belongs to the technical field of gas production well mouths, and particularly relates to a sand-prevention filtering gas production well mouth device and a Christmas tree, the sand-prevention filtering gas production well mouth device comprises a shell, supporting plates are symmetrically arranged on the inner wall of the shell, the supporting plates are attached to the shell, and an annular filtering plate is fixedly installed between the supporting plates; a plurality of partition plates are evenly arranged on the outer side of the annular filter plate and attached to the inner wall of the shell, and a driving assembly is arranged on one side of the shell. Natural gas must penetrate through the annular filter plate in the process of entering from the bottom of the shell and discharging from the top of the shell, sand and impurities in the natural gas can be fully intercepted through the design, the annular filter plate is divided into a plurality of independent areas by the partition plates, and the driving assembly drives the annular filter plate to rotate, so that all the areas participate in filtering work in sequence; according to the circulating filtering mode, the situation that a single area bears filtering pressure for a long time is avoided, the local blocking phenomenon is effectively prevented, and filtering is conducted in each area in a relatively easy state.

Description

Technical Field

[0001] This invention belongs to the field of gas wellhead technology, specifically the sand-proof and filtering gas wellhead device and the wellhead. Background Technology

[0002] In oil and gas extraction engineering, wellhead equipment and Christmas trees are key surface equipment. They play important roles in controlling oil and gas well production, ensuring safe and stable operation during the extraction process, and realizing oil and gas transportation. For sandy gas wells, sand and gravel in the formation will enter the wellbore along with natural gas and rise to the wellhead with the gas flow. If effective sand filtration measures are not taken, the sand and gravel will enter the subsequent gas production process, causing serious wear and damage to the gas production equipment, reducing the service life of the equipment, increasing equipment maintenance costs and downtime for maintenance, and thus affecting the efficiency and economic benefits of the entire gas production operation. Therefore, the application of sand-filtering wellhead equipment and Christmas trees is crucial to ensuring the normal production of sandy gas wells.

[0003] Currently, in sand control and filtration wellhead devices and wellheads, most commonly used filter screens are flat, fixed installation structures. Due to the uneven distribution of sand particles in sand-laden gas, and their impact on the filter screen surface at high speed under the action of airflow, the filtration area of ​​a flat filter screen is relatively limited. During continuous filtration, sand particles will quickly accumulate on the filter screen surface, forming a sand layer. This causes the effective filtration pore size of the filter screen to gradually decrease, and the filtration resistance to continuously increase. Soon, the filter screen will be completely blocked, preventing gas from passing through smoothly, thus seriously affecting the gas production flow rate and efficiency.

[0004] Therefore, the present invention provides a sand-proof and filtering gas wellhead device and a wellhead. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: the sand-proof and filtering gas wellhead device and oil wellhead of the present invention include an outer shell, the inner wall of the outer shell is symmetrically provided with support plates, the support plates are all in contact with the outer shell, an annular filter plate is fixedly installed between the support plates, a plurality of partition plates are evenly provided on the outer side of the annular filter plate, the partition plates are all in contact with the inner wall of the outer shell, and a drive assembly is provided on one side of the outer shell.

[0007] Preferably, the drive assembly includes a drive motor, which is fixedly installed on the outer wall of the housing. Each of the support plates has a rotating shaft fixedly installed on its opposite side. The outer walls of the rotating shafts are rotatably connected to the inner wall of the housing. One of the rotating shafts passes through the housing and is fixedly connected to the output end of the drive motor.

[0008] Preferably, the outer wall of the housing is provided with a chip discharge groove A, and a conveying pipe A is fixedly installed on the outer wall of the housing. The conveying pipe A is connected to the chip discharge groove A, and a collection component A is provided at the end of the conveying pipe A away from the chip discharge groove A.

[0009] Preferably, an air guide seat is fixedly installed on the inner wall of the top of the outer shell, and a filter screen is fixedly installed on the inner wall of the air guide seat.

[0010] Preferably, the outer wall of the housing is provided with a chip discharge groove B, and a conveying pipe B is fixedly installed on the outer wall of the housing. The conveying pipe B is connected to the chip discharge groove B, and a collection component B is provided at the end of the conveying pipe B away from the chip discharge groove B.

[0011] Preferably, the collection component A includes a sealed cabinet, the inner wall of which is fixedly connected to the outer wall of the conveying pipe A. A receiving box is slidably installed on the inner wall of the sealed cabinet. Plug-in seats are symmetrically fixedly installed on the outer wall of the sealed cabinet. Plug-in blocks are inserted into the inner wall of each plug-in seat, and each plug-in block engages with the receiving box. A handle is fixedly installed on the outer wall of the receiving box. The collection component B has the same structure as the collection component A.

[0012] Preferably, a positioning seat is fixedly installed on the top of both the conveying pipe A and the conveying pipe B, and an adjusting screw is threadedly installed on the inner wall of each positioning seat. A sealing baffle is slidably installed on the inner wall of both the conveying pipe A and the conveying pipe B. The inner wall of the sealing baffle is rotatably connected to the outer wall of the adjusting screw, and an adjusting knob is fixedly installed on one end of each adjusting screw.

[0013] Preferably, a plurality of hinge seats are uniformly fixedly installed on the outer wall of the annular filter plate. The hinge seats are rotatably connected to the partition plates respectively. A torsion spring shaft is fixedly installed on the inner wall of the hinge seat. The partition plates are respectively installed on the outer wall of the torsion spring shaft. A limit component is provided on one side of each hinge seat.

[0014] Preferably, the limiting component includes a limiting plate, which is fixedly installed on the outer wall of the hinge seat, and an elastic abutment is fixedly installed on the outer wall of the limiting plate.

[0015] Preferably, a bottom connecting seat is fixedly installed at the bottom of the outer shell, and a gas conveying structure is fixedly installed at the top of the gas guide seat.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. In the sand-proof filtering gas wellhead device and wellhead described in this invention, natural gas must pass through an annular filter plate during the process of entering from the bottom of the casing and exiting from the top. This design ensures that sand and impurities in the natural gas can be fully intercepted. The separator plate divides the annular filter plate into multiple independent areas. The drive component drives the annular filter plate to rotate slowly, so that each area participates in the filtration work in turn. This circulating filtration method avoids a single area bearing filtration pressure for a long time, effectively preventing the occurrence of local blockage. Each area can perform filtration in a relatively relaxed state, thereby extending the overall service life of the annular filter plate.

[0018] 2. The sand-proof filtering gas wellhead device and wellhead of the present invention, as the annular filter plate rotates, each area will pass through the chip removal groove A in sequence. When each area passes through the chip removal groove A, the sand and impurities in that area will enter the delivery pipe A through the chip removal groove A by gravity and centrifugal force generated by rotation. After entering the delivery pipe A, the sand and impurities will slide down along its internal channel into the collection component A for collection. The whole process does not require manual intervention, realizing continuous and automatic chip removal and impurity collection, which greatly improves work efficiency. It is especially suitable for large-scale and long-term gas production operations, reducing the production interruption time caused by manual cleaning.

[0019] 3. In the sand-proof filtration gas wellhead device and wellhead described in this invention, during the sequential filtration process in each area, natural gas passes through the annular filter plate from the bottom upwards. The annular filter plate filters impurities in the natural gas. When the filtration area rotates to the top, the natural gas flow reverses. At this time, the annular filter plate in this area is subjected to the airflow of natural gas from the inside out. The impact force of the airflow can peel off the tiny sand and impurities adhering to the annular filter plate for subsequent discharge, realizing the automatic cleaning of the annular filter plate. This automatic cleaning function avoids the long-term accumulation of sand and impurities on the annular filter plate, reducing its wear and corrosion. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the outer casing of the present invention;

[0023] Figure 3 This is a cross-sectional view of the outer shell structure of the present invention;

[0024] Figure 4 This is another structural cross-sectional view of the outer casing of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the annular filter plate of the present invention;

[0026] Figure 6 This is a schematic diagram of the air guide seat structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the sealing cabinet of the present invention;

[0028] Figure 8 This is a schematic diagram of the positioning seat structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the partition plate of the present invention.

[0030] In the diagram: 1. Outer shell; 2. Support plate; 3. Annular filter plate; 4. Divider plate; 5. Drive motor; 6. Rotating shaft; 7. Chip discharge trough A; 8. Conveying pipe A; 9. Air guide seat; 10. Filter screen; 11. Chip discharge trough B; 12. Conveying pipe B; 13. Sealing cabinet; 14. Receiving box; 15. Plug-in socket; 16. Plug-in block; 17. Handle; 18. Positioning seat; 19. Adjusting screw; 20. Sealing baffle; 21. Adjusting knob; 22. Hinge seat; 23. Torsion spring shaft; 24. Limiting plate; 25. Elastic abutment plate; 26. Bottom connecting seat; 27. Gas conveying structure. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] like Figures 1 to 5As shown in the embodiment of the present invention, the sand-proof and filtering gas wellhead device and wellhead include an outer shell 1. Support plates 2 are symmetrically arranged on the inner wall of the outer shell 1, and each support plate 2 is in contact with the outer shell 1. An annular filter plate 3 is fixedly installed between the support plates 2. Several partition plates 4 are evenly arranged on the outer side of the annular filter plate 3, and each partition plate 4 is in contact with the inner wall of the outer shell 1. A drive assembly is provided on one side of the outer shell 1. During gas extraction, natural gas enters from the bottom of the outer shell 1 and exits from the top. As the natural gas passes through the interior of the outer shell 1, it is restricted by the annular filter plate 3 and the partition plates 4, causing the airflow to pass through the annular filter plate 3. The annular filter plate 3 filters sand and impurities in the airflow. The partition plates 4 divide the annular filter plate 3 into multiple areas. During gas extraction, the drive assembly slowly rotates the annular filter plate 3. The rotation of the annular filter plate 3 causes each area to perform filtration sequentially. In summary, natural gas enters from the bottom of the outer shell 1... During the process of natural gas entering and exiting from the top, it must pass through the annular filter plate 3. This design ensures that sand and impurities in the natural gas can be fully intercepted. The separator plate 4 divides the annular filter plate 3 into multiple independent areas. The drive component drives the annular filter plate 3 to rotate slowly, so that each area participates in the filtration work in turn. This circulating filtration method avoids a single area bearing filtration pressure for a long time, effectively preventing the occurrence of local blockage. Each area can filter in a relatively relaxed state, thereby extending the overall service life of the annular filter plate 3 and improving filtration efficiency. Since the annular filter plate 3 avoids severe local blockage through multi-area circulating filtration, the overall amount of sand and impurities accumulated on the filter plate is reduced. This means that the equipment does not need to be cleaned frequently during operation, reducing maintenance costs and labor intensity. Compared with traditional filtration devices, this design greatly extends the continuous operation time of the equipment and improves production efficiency.

[0033] like Figures 2 to 5 As shown, the drive assembly includes a drive motor 5, which is fixedly mounted on the outer wall of the housing 1. Rotating shafts 6 are fixedly mounted on opposite sides of the support plates 2, with the outer walls of the rotating shafts 6 rotatably connected to the inner wall of the housing 1. One of the rotating shafts 6 passes through the housing 1 and is fixedly connected to the output end of the drive motor 5. The support plates 2 support the annular filter plate 3 from the inside, ensuring the structural strength of the annular filter plate 3. Through the cooperation of the support plates 2 and the rotating shafts 6, the annular filter plate 3 is positioned, enabling it to rotate. The drive motor 5 drives the rotating shafts 6 to rotate, and the rotating shafts 6, through the support plates 2, drive the annular filter plate 3 to rotate, providing power for the operation of the device.

[0034] like Figures 1 to 4As shown, the outer wall of the outer casing 1 is provided with a chip removal groove A7, and a conveying pipe A8 is fixedly installed on the outer wall of the outer casing 1. The conveying pipe A8 is connected to the chip removal groove A7, and a collection component A is provided at the end of the conveying pipe A8 away from the chip removal groove A7. The partition plate 4 divides the annular filter plate 3 into multiple areas. During the filtration process, the sand and impurities filtered in each area are confined between the corresponding two partition plates 4. When the annular filter plate 3 rotates, the partition plate 4 pushes these sand and impurities to rotate together. As the annular filter plate 3 rotates, each area will pass through the chip removal groove A7 in sequence. When each area passes through the chip removal groove A7, the sand and impurities filtered in that area will enter the conveying pipe A8 through the chip removal groove A7 by gravity and the centrifugal force generated by the rotation. After entering the conveying pipe A8, the sand and impurities will follow its internal channels. The debris slides into the collection component A for collection. The entire process requires no manual intervention, achieving continuous and automatic debris removal and impurity collection, greatly improving work efficiency. It is especially suitable for large-scale, long-term gas extraction operations, reducing production interruption time caused by manual cleaning. This automatic debris removal design can adapt to natural gas extraction conditions with different sand content and impurity concentrations. Regardless of the content of sand and impurities in the natural gas, as long as the annular filter plate 3 is rotating, the sand and impurities in each area will be automatically discharged according to the predetermined process, ensuring the stability and reliability of the debris removal work. The automatic debris removal system can discharge sand and impurities before they accumulate to a certain level, always keeping the filter holes of the annular filter plate 3 unobstructed, thereby ensuring that its filtration effect is not affected and can continuously and stably filter sand and impurities in natural gas.

[0035] like Figure 4 and Figure 6As shown, a gas guide seat 9 is fixedly installed on the inner wall of the top of the outer casing 1, and a filter screen 10 is fixedly installed on the inner wall of the gas guide seat 9. During the filtration process in each area, natural gas passes through the annular filter plate 3 from the bottom upwards. The annular filter plate 3 filters impurities in the natural gas. When the filtration area rotates to the top, the natural gas flow reverses. At this time, the annular filter plate 3 in this area will be subjected to the airflow from the inside to the outside of the natural gas. The impact force of the airflow can peel off the small sand and impurities adhering to the annular filter plate 3 for subsequent discharge, realizing the automatic cleaning of the annular filter plate 3. This automatic cleaning function avoids the long-term accumulation of sand and impurities on the annular filter plate 3, reducing its wear and corrosion. If impurities adhere to the annular filter plate 3 for a long time, it will not only block the filter holes and reduce the filtration efficiency, but also accelerate the aging and damage of the annular filter plate 3. The automatic cleaning mechanism keeps the surface of the annular filter plate 3 clean, extending its service life and reducing equipment replacement costs. The filter screen 10 set on the air guide seat 9 can block the sand and impurities peeled off from the annular filter plate 3, preventing the sand and impurities blown off with the airflow. As the partition plate 4 rotates with the annular filter plate 3, the partition plate 4 will pass over the surface of the filter screen 10 in turn, thereby scraping off the impurities that may be attached to the surface of the filter screen 10, realizing the cleaning of the filter screen 10. This avoids the problem of impurities accumulating on the filter screen 10 and causing blockage. After the filter screen 10 is blocked, it will increase the airflow resistance, affect the flow of natural gas, and may also cause the filter screen 10 to break and be damaged. Through the automatic scraping action of the partition plate 4, the filter screen 10 is kept unobstructed, extending the service life of the filter screen 10, and thus extending the service life of the entire device.

[0036] like Figures 2 to 4 As shown, the outer wall of the outer casing 1 is provided with a chip removal groove B11, and a conveying pipe B12 is fixedly installed on the outer wall of the outer casing 1. The conveying pipe B12 is connected to the chip removal groove B11, and a collection component B is provided at the end of the conveying pipe B12 away from the chip removal groove B11. The annular filter plate 3 area, which is rotated to the top and cleaned by the reverse airflow, will pass through the chip removal groove B11 before rotating to the bottom for filtration. When passing through the chip removal groove B11, the sand and impurities stripped by the reverse airflow will be discharged through the chip removal groove B11. This prevents the area from rotating to the bottom for filtration with sand and impurities and affecting the normal passage of natural gas, and also prevents the stripped sand and impurities from re-adhering to the annular filter plate 3. The chip removal groove B11 and the conveying pipe B12 and the chip removal groove A7 and the conveying pipe A8 are symmetrically arranged, so that chip removal can be carried out from both sides. On the one hand, the pressure can be shared, increasing the flow rate and speed of chip removal. On the other hand, even if one side fails, the other side can still carry out chip removal.

[0037] like Figure 2 and Figure 7As shown, collection component A includes a sealed cabinet 13, the inner wall of which is fixedly connected to the outer wall of the conveying pipe A8. A receiving box 14 is slidably installed on the inner wall of the sealed cabinet 13, and plug-in seats 15 are symmetrically fixedly installed on the outer wall of the sealed cabinet 13. Plug-in blocks 16 are inserted into the inner wall of the plug-in seats 15, and each plug-in block 16 engages with the receiving box 14. A handle 17 is fixedly installed on the outer wall of the receiving box 14. Collection component B has the same structure as collection component A. Collection component B has the same structure as collection component A. When sand or impurities... After entering the conveying pipe A8 or conveying pipe B12, the impurities will slide down the inclined surface of the conveying pipe into the corresponding receiving box 14 for collection. When it is necessary to process the collected sand and impurities, stop the gas sampling operation, pull out the plug block 16 to release the fixation of the receiving box 14, and then pull out the receiving box 14 through the handle 17 to process the sand and impurities collected in the receiving box 14. A sealing structure is provided between the sealing cabinet 13 and the receiving box 14 to ensure that no gas leakage occurs during the gas sampling operation.

[0038] like Figure 3 and Figure 8 As shown, positioning seats 18 are fixedly installed on the top of both conveying pipes A8 and B12. Adjusting screws 19 are threaded onto the inner walls of both positioning seats 18. Sealing baffles 20 are slidably installed on the inner walls of both conveying pipes A8 and B12. The inner walls of the sealing baffles 20 are rotatably connected to the outer walls of the adjusting screws 19. Adjusting knobs 21 are fixedly installed on one end of each adjusting screw 19. Before processing the sand and impurities collected inside the receiving box 14, the corresponding adjusting knobs 21 are rotated. The adjusting knobs 21 drive the adjusting screws 19 to rotate. When the adjusting screws 19 rotate, they will drive the sealing baffles 20 to move into the conveying pipe through the threaded engagement with the positioning seats 18. The sealing baffles 20 are equipped with a sealing structure. When the sealing baffles 20 are fully inserted into the conveying pipe, they will seal the conveying pipe. At this time, the receiving box 14 can be cleaned. The staff can carry out the cleaning operation at any time without waiting for the equipment to stop, which greatly improves the work efficiency and reduces the production loss caused by downtime.

[0039] like Figure 5 and Figure 9As shown, several hinge seats 22 are uniformly fixedly installed on the outer wall of the annular filter plate 3. The hinge seats 22 are rotatably connected to the partition plates 4. A torsion spring shaft 23 is fixedly installed on the inner wall of the hinge seat 22. The partition plates 4 are respectively installed on the outer wall of the torsion spring shaft 23. A limit component is provided on one side of each hinge seat 22. The partition plates 4 are connected to the annular filter plate 3 through the torsion spring shaft 23 and the hinge seats 22. In the initial state, the partition plates 4 are deflected due to the restriction of the outer shell 1. During the rotation of the partition plates 4 with the annular filter plate 3, when the partition plates 4 rotate to the chip discharge groove A7 or chip discharge groove B11, due to the loss of the restriction of the outer shell 1, the partition plates 4 will rotate around the torsion spring shaft 23 under the action of the elastic force and hit the limit component. During this process, the inertia of the partition plates 4 and the vibration generated by the impact can actively throw out the sand and impurities attached to its surface. Compared to traditional methods that rely solely on gravity or simple tilting for chip removal, this method significantly improves the force and speed of chip removal, effectively preventing the accumulation of sand and impurities on the separator plate 4, thus achieving better chip removal. When the separator plate 4 impacts the limiting component, the annular filter plate 3 vibrates. This vibration acts on the surface of the annular filter plate 3, loosening and dislodging the tiny sand and impurities. Through this self-cleaning method, the blockage of tiny particles in the pores of the annular filter plate 3 is effectively reduced, maintaining the permeability of the annular filter plate 3, improving filtration efficiency, ensuring that natural gas can pass smoothly through the annular filter plate 3, and reducing pressure loss caused by blockage of the annular filter plate 3, thus ensuring the stable operation of the gas extraction system. When the separator plate 4 is removed from the chip removal groove A7 or chip removal groove B11, it will rotate back to the deflected state due to the restriction of the outer shell 1.

[0040] like Figure 9 As shown, the limiting assembly includes a limiting plate 24, which is fixedly installed on the outer wall of the hinge seat 22. An elastic abutment 25 is fixedly installed on the outer wall of the limiting plate 24. The elastic abutment 25 is fixed to one side of the partition plate 4 through the limiting plate 24. When the partition plate 4 rotates around the torsion spring shaft 23, the elastic abutment 25 will limit the partition plate 4 to prevent it from rotating excessively. At the same time, since the elastic abutment 25 itself is elastic, it can buffer the impact when the partition plate 4 rotates to prevent structural damage.

[0041] like Figure 1 As shown, a bottom connecting seat 26 is fixedly installed at the bottom of the outer casing 1, and a gas conveying structure 27 is fixedly installed at the top of the gas guide seat 9. The bottom connecting seat 26 is used for connecting and fixing the device. Natural gas is conveyed to the inside of the outer casing 1 through the bottom connecting seat 26. After being filtered through the outer casing 1, the natural gas is conveyed to the gas guide seat 9 and then enters the gas conveying structure 27 through the gas guide seat 9 for subsequent distribution and conveying.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sand-proof and filter-based gas wellhead device and Christmas tree, comprising a housing (1), characterized in that: The inner wall of the outer shell (1) is symmetrically provided with support plates (2), and the support plates (2) are all in contact with the outer shell (1). An annular filter plate (3) is fixedly installed between the support plates (2). Several partition plates (4) are evenly provided on the outer side of the annular filter plate (3). The partition plates (4) are all in contact with the inner wall of the outer shell (1). A drive assembly is provided on one side of the outer shell (1).

2. The sand-control and filtering gas wellhead device and Christmas tree according to claim 1, characterized in that: The drive assembly includes a drive motor (5), which is fixedly installed on the outer wall of the housing (1). A rotating shaft (6) is fixedly installed on each of the support plates (2) on opposite sides. The outer walls of the rotating shafts (6) are rotatably connected to the inner wall of the housing (1). One of the rotating shafts (6) passes through the housing (1) and is fixedly connected to the output end of the drive motor (5).

3. The sand-control and filtering gas wellhead device and Christmas tree according to claim 1, characterized in that: The outer wall of the outer shell (1) is provided with a chip discharge groove A (7), and a conveying pipe A (8) is fixedly installed on the outer wall of the outer shell (1). The conveying pipe A (8) is connected to the chip discharge groove A (7), and a collection component A is provided at the end of the conveying pipe A (8) away from the chip discharge groove A (7).

4. The sand-control and filtering gas wellhead device and Christmas tree according to claim 1, characterized in that: An air guide seat (9) is fixedly installed on the inner wall of the top of the outer shell (1), and a filter screen (10) is fixedly installed on the inner wall of the air guide seat (9).

5. The sand-control and filtering gas wellhead device and Christmas tree according to claim 3, characterized in that: The outer wall of the outer shell (1) is provided with a chip discharge groove B (11), and a conveying pipe B (12) is fixedly installed on the outer wall of the outer shell (1). The conveying pipe B (12) is connected to the chip discharge groove B (11), and a collection component B is provided at the end of the conveying pipe B (12) away from the chip discharge groove B (11).

6. The sand-control and filtering gas wellhead device and Christmas tree according to claim 5, characterized in that: The collection component A includes a sealed cabinet (13), the inner wall of which is fixedly connected to the outer wall of the conveying pipe A (8), a receiving box (14) is slidably installed on the inner wall of the sealed cabinet (13), and plug-in seats (15) are symmetrically fixedly installed on the outer wall of the sealed cabinet (13). Plug-in blocks (16) are inserted into the inner wall of the plug-in seats (15), and the plug-in blocks (16) are all snapped into the receiving box (14). A handle (17) is fixedly installed on the outer wall of the receiving box (14). The collection component B has the same structure as the collection component A.

7. The sand-control and filtering gas wellhead device and Christmas tree according to claim 5, characterized in that: The top of both the conveying pipe A (8) and the conveying pipe B (12) is fixedly installed with a positioning seat (18). The inner wall of the positioning seat (18) is threaded with an adjusting screw (19). The inner wall of both the conveying pipe A (8) and the conveying pipe B (12) is slidably installed with a sealing baffle (20). The inner wall of the sealing baffle (20) is rotatably connected to the outer wall of the adjusting screw (19). One end of the adjusting screw (19) is fixedly installed with an adjusting knob (21).

8. The sand-control and filtering gas wellhead device and Christmas tree according to claim 1, characterized in that: The outer wall of the annular filter plate (3) is uniformly fixed with a number of hinge seats (22). The hinge seats (22) are rotatably connected to the partition plate (4). The inner wall of the hinge seat (22) is fixedly installed with a torsion spring shaft (23). The partition plate (4) is installed on the outer wall of the torsion spring shaft (23). Each hinge seat (22) has a limit component on one side.

9. The sand-control and filtering gas wellhead device and Christmas tree according to claim 8, characterized in that: The limiting component includes a limiting plate (24), which is fixedly installed on the outer wall of the hinge seat (22), and an elastic abutment (25) is fixedly installed on the outer wall of the limiting plate (24).

10. The sand-control and filtering gas wellhead device and Christmas tree according to claim 4, characterized in that: The bottom of the outer shell (1) is fixedly installed with a bottom connecting seat (26), and the top of the gas guide seat (9) is fixedly installed with a gas conveying structure (27).

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