Fracturing wellhead device with filtering function

Abstract

The fracturing wellhead device with the filtering function comprises a first pipeline and a second pipeline, a filter screen is arranged between the first pipeline and the second pipeline, a filter shell is arranged on the outer side of the filter screen, a screen cleaning assembly is arranged on the inner side of the filter screen, the first pipeline is connected to the inner side of the filter screen, and the second pipeline is connected to the inner side of the filter screen. And the second pipeline is connected to the filter shell on the outer side of the filter screen. According to the fracturing device, the filter screen is arranged between the first pipeline and the second pipeline, impurities between the first pipeline and the second pipeline are filtered through the filter screen, the impurities are effectively prevented from entering the fracturing device, the screen cleaning assembly is arranged in the filter screen to clean the filter screen, the filter screen can be effectively prevented from being blocked, and smoothness of the filter screen is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of well killing manifolds, in particular to a fracturing wellhead device with a filtering function. Background Art

[0002] The fracturing wellhead device is an important equipment combination used in oil and gas well fracturing construction. Its main function is to safely and effectively transport the ground high-pressure liquid into the formation to achieve the purpose of reservoir fracturing. For low-yield oil fields, fracturing technology is needed to increase the production of oil and gas fields. It is usually necessary to install a high-pressure and efficient fracturing wellhead device at the wellhead to achieve high-pressure and high-flow injection, thereby improving the hydraulic efficiency of the fracturing wellhead device.

[0003] Existing wellhead devices lack filtering devices. When oil is extracted, impurities in the oil may enter the fracturing device, causing blockage and affecting the use of the fracturing device. A very small number of wellhead devices simply set up filter pipes or meshes to achieve filtration, but it is not easy to clean when the filter is blocked. Summary of the invention

[0004] The invention provides a fracturing wellhead device with a filtering function, which is used to solve the problems raised in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A fracturing wellhead device with filtering function comprises a first pipeline and a second pipeline, a filter screen is arranged between the first pipeline and the second pipeline, a filter shell is arranged outside the filter screen, a filter cleaning component is arranged inside the filter screen, the first pipeline is connected to the inside of the filter screen, and the second pipeline is connected to the filter shell outside the filter screen.

[0007] Preferably, a driving shaft is provided inside the filter screen, the driving shaft is rotatably connected to the filter screen, the driving shaft portion is located in the first pipeline, and one end of the driving shaft located in the first pipeline is fixedly connected to a driving impeller;

[0008] The drive shaft is composed of several sections of reciprocating screws;

[0009] The portion of the drive shaft located in the filter screen is threadedly engaged with a plurality of threaded sleeves, the threaded sleeves are fixedly connected with a rack, the rack is slidably connected to the filter screen up and down, the rack is meshed with a gear, the gear is connected to the screen cleaning assembly, the gear is rotatably connected to the screen cleaning assembly, and the gear is used to drive the screen cleaning assembly.

[0010] Preferably, the screen cleaning assembly includes a fixed shell, the fixed shell is arranged on the outer periphery of the driving shaft, the fixed shell is rotatably connected to the driving shaft, and the fixed shell is slidably connected to the rack.

[0011] Preferably, two sets of second rotating shafts are symmetrically arranged on the fixed shell. The second rotating shafts are fixedly connected to the fixed shell. A second rotating rod is rotatably connected to the second rotating shafts. The second rotating rod is rotatably connected to the rotating support. The rotating support is fixedly connected to the first cleaning head. A flexible brush head is arranged on the first cleaning head. The first cleaning head can abut against the inner wall of the filter screen.

[0012] Preferably, two sets of first rotating shafts are symmetrically arranged on the fixed shell. The first rotating shafts are rotatably connected to the fixed shell. A driving block is fixedly connected to one of the first rotating shafts. The driving block is fixedly connected to the gear.

[0013] Half gears are fixedly connected to both of the two first rotating shafts. The two half gears are meshed with each other.

[0014] A first rotating rod is fixedly connected to the first rotating shaft. The first rotating rod is rotatably connected to the rotating support fixedly arranged on the first cleaning head.

[0015] The first rotating rod and the second rotating rod are arranged in parallel.

[0016] Preferably, a second linkage rod is fixedly connected to the first rotating shaft. The second linkage rod is rotatably connected to the first linkage rod. The first linkage rod is rotatably connected to the second cleaning head.

[0017] Preferably, the second pipeline and the filter shell are connected through a connecting component. The connecting component can connect multiple pipelines. The connecting component includes a connecting sleeve fixedly connected to the surface of the filter shell. A pipeline connecting piece is connected to the connecting sleeve. The pipeline connecting piece communicates with the inside of the filter shell. A sleeve hole communicating with the pipeline connecting piece is arranged on the connecting sleeve. The sleeve hole is used for connecting with a sleeve. The sleeve communicates with the second pipeline.

[0018] A through limiting hole is arranged on the connecting sleeve.

[0019] Preferably, the sleeve is fixedly connected to the installation plane. A limiting shell is fixedly connected to the installation plane. The limiting shell is arranged corresponding to the limiting hole. The limiting shell can be inserted into the limiting hole.

[0020] Preferably, a pressing plate is arranged at the end of the limiting shell. A pressure rod is fixedly connected to the pressing plate. The pressure rod penetrates through the end face of the limiting shell. A fixing block is fixedly connected to one end of the pressure rod located inside the limiting shell. The fixing block is slidably connected inside the limiting shell. A connecting rod is fixedly connected to the limiting shell. The connecting rod partially penetrates through the side wall of the limiting shell. The connecting rod is slidably connected to the limiting shell. A linkage plate is fixedly connected to one end of the connecting rod close to the installation plane.

[0021] Preferably, a balance plate is provided on the fixed block, clamping blocks are symmetrically arranged on both sides of the balance plate, holes for accommodating the ejection of the clamping blocks are provided on the limiting shell, the clamping blocks are slidably connected to the fixed block, a spring is arranged between the clamping blocks and the balance plate, and both ends of the spring are fixedly connected to the clamping blocks and the balance plate respectively.

[0022] Compared with the prior art, the present invention at least includes the following beneficial effects:

[0023] In this application, a filter screen is arranged between the first pipeline and the second pipeline, and impurities between the first pipeline and the second pipeline are filtered through the filter screen, effectively preventing impurities from entering the fracturing device. Moreover, a screen cleaning component is arranged inside the filter screen to clean the filter screen, which can effectively prevent the filter screen from being blocked and ensure the smoothness of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the main structure of the present invention;

[0025] Figure 2 is a schematic diagram of the driving structure of the screen cleaning component of the present invention;

[0026] Figure 3 is a partial structure schematic diagram of the screen cleaning component of the present invention;

[0027] Figure 4 is a schematic diagram of the structure of the screen cleaning component of the present invention;

[0028] Figure 5 is a schematic diagram of one end structure of the connection component of the present invention;

[0029] Figure 6 is a schematic diagram of the other end structure of the connection component of the present invention;

[0030] Figure 7 is a schematic diagram of the connection structure of the clamping block of the present invention.

[0031] In the figure: 1, first pipeline; 2, second pipeline; 3, filter screen; 4, filter shell; 5, screen cleaning component; 6, drive shaft; 7, drive impeller; 8, threaded sleeve; 9, rack; 10, gear; 11, fixed shell; 12, first rotating rod; 13, second rotating rod; 14, rotating support; 15, first cleaning head; 16, second cleaning head; 17, half gear; 18, first linkage rod; 19, drive block; 20, second linkage rod; 21, first rotating shaft; 22, second rotating shaft; 23, connecting sleeve; 24, pipeline connecting piece; 25, sleeve hole; 26, limiting hole; 27, sleeve; 28, linkage plate; 29, limiting shell; 30, clamping block; 31, pressing plate; 32, connecting rod; 33, fixed block; 34, chute; 35, balance plate; 36, spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In the present invention, descriptions such as "first" and "second" are only for descriptive purposes and do not particularly refer to the order or sequence. Nor are they used to limit the present invention. They are merely used to distinguish protection components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] Embodiment 1

[0034] Please refer to Figure 1 , a fracturing wellhead device with a filtering function, including a first pipeline 1 and a second pipeline 2. A filter screen 3 is arranged between the first pipeline 1 and the second pipeline 2. A filter housing 4 is arranged outside the filter screen 3, and a screen cleaning component 5 is arranged inside the filter screen 3. The first pipeline 1 is connected to the inside of the filter screen 3, and the second pipeline 2 is connected to the filter housing 4 outside the filter screen 3.

[0035] The working principle and beneficial effects of the above solution:

[0036] In this application, a filter screen 3 is arranged between the first pipeline 1 and the second pipeline 2. The impurities between the first pipeline 1 and the second pipeline 2 are filtered through the filter screen 3, effectively preventing impurities from entering the fracturing device. Moreover, in this application, a screen cleaning component 5 is arranged inside the filter screen 3 to clean the filter screen 3, which can effectively prevent the filter screen 3 from being blocked and ensure the smoothness of the filter screen 3.

[0037] Embodiment 2

[0038] Please refer to Figures 2 - 4 , on the basis of Embodiment 1, a driving shaft 6 is arranged inside the filter screen 3. The driving shaft 6 is rotatably connected to the filter screen 3. A part of the driving shaft 6 is located inside the first pipeline 1, and a driving impeller 7 is fixedly connected to one end of the driving shaft 6 located inside the first pipeline 1;

[0039] The driving shaft 6 is composed of several reciprocating lead screws;

[0040] A number of thread sleeves 8 are threadedly engaged on the part of the driving shaft 6 located inside the filter screen 3. A rack 9 is fixedly connected to the thread sleeve 8. The rack 9 is slidably connected to the filter screen 3 up and down. The rack 9 is engaged with a gear 10. The gear 10 is connected to the screen cleaning component 5. The gear 10 is rotatably connected inside the screen cleaning component 5, and the gear 10 is used to drive the screen cleaning component 5.

[0041] The cleaning net assembly 5 includes a fixing shell 11 disposed on the outer periphery of the driving shaft 6. The fixing shell 11 is rotatably connected to the driving shaft 6 and slidably connected to the rack 9.

[0042] Two groups of second rotating shafts 22 are symmetrically arranged on the fixing shell 11. The second rotating shafts 22 are fixedly connected to the fixing shell 11. A second rotating rod 13 is rotatably connected to the second rotating shafts 22. The second rotating rod 13 is rotatably connected to the rotating support 14. The rotating support 14 is fixedly connected to the first cleaning head 15. A flexible brush head is arranged on the first cleaning head 15. The first cleaning head 15 can abut against the inner wall of the filter screen 3.

[0043] Two groups of first rotating shafts 21 are symmetrically arranged on the fixing shell 11. The first rotating shafts 21 are rotatably connected to the fixing shell 11. A driving block 19 is fixedly connected to one of the first rotating shafts 21. The driving block 19 is fixedly connected to the gear 10.

[0044] Half gears 17 are fixedly connected to both of the two groups of first rotating shafts 21. The two half gears 17 are meshed with each other.

[0045] A first rotating rod 12 is fixedly connected to the first rotating shaft 21. The first rotating rod 12 is rotatably connected to the rotating support 14 fixed on the first cleaning head 15.

[0046] The first rotating rod 12 is arranged in parallel with the second rotating rod 13.

[0047] A second linkage rod 20 is fixedly connected to the first rotating shaft 21. The second linkage rod 20 is rotatably connected to the first linkage rod 18. The first linkage rod 18 is rotatably connected to the second cleaning head 16.

[0048] The working principle and beneficial effects of the above solution:

[0049] The substance flowing between the first pipeline 1 and the second pipeline 2 drives the driving impeller 7 to rotate, thereby causing the driving shaft 6 to rotate. Since the driving shaft 6 is composed of several reciprocating lead screws, the rotation of the driving shaft 6 causes the threaded sleeve 8 connected to the driving shaft 6 to move up and down reciprocally. Through the rack 9, the gear 10 cyclically deflects by a certain angle, and then through the driving block 19, both groups of half gears 17 swing periodically. The first rotating rod 12 drives the first cleaning head 15 to swing along with the swing of the half gear 17 (the swing of the first cleaning head 15 is a movement in the up and down direction along the surface of the filter screen 3, and the distance between it and the filter screen 3 will change, and it is compensated by the flexible brush head on its surface). The second rotating rod 13 is arranged parallel to the first rotating rod 12, ensuring that the first cleaning head 15 can always remain parallel to the surface of the filter screen 3 while swinging. The flexible brush head arranged on the surface of the first cleaning head 15 remains in contact with the filter screen 3 all the time through deformation when the first cleaning head 15 swings, cleaning the surface of the filter screen 3;

[0050] The second cleaning head 16 makes a reciprocating movement perpendicular to the filter screen 3 under the swing of the half gear 17, causing the filter screen 3 to deform slightly. When the external force on the filter screen 3 is removed, it restores, and the impurities on the filter screen 3 fall off during the repeated deformation of the filter screen 3, ensuring the cleanliness and smoothness of the filter screen 3.

[0051] Embodiment 3

[0052] Please refer to Figures 5 - 7 , on the basis of Embodiment 1, the second pipeline 2 and the filter housing 4 are connected through a connection assembly. The connection assembly can connect multiple groups of pipelines. The connection assembly includes a connection sleeve 23 fixedly connected to the surface of the filter housing 4. A pipeline connector 24 is connected to the connection sleeve 23. The pipeline connector 24 communicates with the inside of the filter housing 4. A sleeve hole 25 communicating with the pipeline connector 24 is provided on the connection sleeve 23. The sleeve hole 25 is used to connect with a sleeve 27. The sleeve 27 communicates with the second pipeline 2;

[0053] A through limiting hole 26 is provided on the connection sleeve 23.

[0054] The sleeve 27 is fixedly connected to the installation plane. A limiting shell 29 is fixedly connected to the installation plane. The limiting shell 29 is arranged corresponding to the limiting hole 26, and the limiting shell 29 can be inserted into the limiting hole 26.

[0055] A pressure plate 31 is provided at the end of the limit housing 29. The pressure plate 31 is fixedly connected with a pressure rod. The pressure rod penetrates the end face of the limit housing 29. A fixed block 33 is fixedly connected to one end of the pressure rod located inside the limit housing 29. The fixed block 33 is slidably connected to the inside of the limit housing 29. A connecting rod 32 is fixedly connected to the limit housing 29. Part of the connecting rod 32 penetrates the side wall of the limit housing 29. The connecting rod 32 is slidably connected to the limit housing 29. A linkage plate 28 is fixedly connected to one end of the connecting rod 32 close to the installation plane.

[0056] A balance plate 35 is provided on the fixed block 33. Clamping blocks 30 are symmetrically arranged on both sides of the balance plate 35. The limit housing 29 is provided with holes for accommodating the clamping blocks 30 to pop out. The clamping blocks 30 are slidably connected to the fixed block 33. A spring 36 is arranged between the clamping blocks 30 and the balance plate 35. The two ends of the spring 36 are respectively fixedly connected to the clamping blocks 30 and the balance plate 35.

[0057] The working principle and beneficial effects of the above solution:

[0058] The second pipeline 2 and the filter housing 4 can be quickly disassembled through the connection component, so that the filter screen 3 in the filter housing 4 can be thoroughly cleaned or even replaced. Moreover, the connection component can connect multiple groups of pipelines at the same time, which is convenient and fast;

[0059] When connecting the second pipeline 2 and the filter housing 4, the limit housing 29 is inserted into the limit hole 26. The limit hole 26 presses the clamping block 30 to make the clamping block 30 retract. When the end face of the connecting sleeve 23 exceeds the clamping block 30, the clamping block 30 rebounds under the action of the spring 36 and is clamped to the end face of the connecting sleeve 23. The sleeve 27 is inserted into the sleeve hole 25 to complete the connection of the two;

[0060] When disassembling, pull the pressure plate 31 to drive the clamping block 30 to move. Under the action of the side wall of the limit housing 29, the clamping block 30 retracts into the limit housing 29, releasing the restriction on the connecting sleeve 23. Then continue to pull out the connecting sleeve 23 to separate the second pipeline 2 and the filter housing 4. At this time, the filter screen 3 can be replaced or cleaned.

[0061] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A fracturing wellhead device with filtering function, characterized in that: The invention comprises a first pipeline (1) and a second pipeline (2); a filter screen (3) is arranged between the first pipeline (1) and the second pipeline (2); a filter housing (4) is arranged outside the filter screen (3); a filter cleaning assembly (5) is arranged inside the filter screen (3); the first pipeline (1) is connected to the inside of the filter screen (3); and the second pipeline (2) is connected to the filter housing (4) outside the filter screen (3).

2. A fracturing wellhead device with filtering function according to claim 1, characterized in that: A drive shaft (6) is arranged inside the filter screen (3), the drive shaft (6) is rotatably connected to the filter screen (3), a portion of the drive shaft (6) is located in the first pipeline (1), and one end of the drive shaft (6) located in the first pipeline (1) is fixedly connected to a drive impeller (7); The driving shaft (6) is composed of a plurality of reciprocating screws; A plurality of threaded sleeves (8) are threadedly engaged on the portion of the drive shaft (6) located inside the filter screen (3). A rack (9) is fixedly connected to the threaded sleeve (8). The rack (9) is slidably connected to the filter screen (3) up and down. The rack (9) is meshed with a gear (10). The gear (10) is connected to the screen cleaning assembly (5). The gear (10) is rotatably connected to the screen cleaning assembly (5). The gear (10) is used to drive the screen cleaning assembly (5).

3. The fracturing wellhead device with filtering function according to claim 2, characterized in that: The net cleaning assembly (5) includes a fixed shell (11) which is arranged on the outer periphery of the driving shaft (6), the fixed shell (11) is rotatably connected to the driving shaft (6), and the fixed shell (11) is slidably connected to the rack (9).

4. The fracturing wellhead device with filtering function according to claim 3, characterized in that: Two groups of second rotating shafts (22) are symmetrically arranged on the fixed shell (11); the second rotating shafts (22) are fixedly connected to the fixed shell (11); a second rotating rod (13) is rotatably connected to the second rotating shaft (22); the second rotating rod (13) is rotatably connected to a rotating support (14); the rotating support (14) is fixedly connected to a first cleaning head (15); a flexible brush head is arranged on the first cleaning head (15); and the first cleaning head (15) can abut against the inner wall of the filter screen (3).

5. The fracturing wellhead device with filtering function according to claim 4, characterized in that: Two groups of first rotating shafts (21) are symmetrically arranged on the fixed shell (11), and the first rotating shafts (21) are rotatably connected to the fixed shell (11). A driving block (19) is fixedly connected to one group of the first rotating shafts (21), and the driving block (19) is fixedly connected to the gear (10); The two sets of first rotating shafts (21) are both fixedly connected with half gears (17), and the two sets of half gears (17) are meshed; A first rotating rod (12) is fixedly connected to the first rotating shaft (21), and the first rotating rod (12) is rotatably connected to a rotating support (14) fixed to the first cleaning head (15); The first rotating rod (12) and the second rotating rod (13) are arranged in parallel.

6. The fracturing wellhead device with filtering function according to claim 5, characterized in that: A second linkage rod (20) is fixedly connected to the first rotating shaft (21); the second linkage rod (20) is rotationally connected to the first linkage rod (18); and the first linkage rod (18) is rotationally connected to the second cleaning head (16).

7. The fracturing wellhead device with filtering function according to claim 1, characterized in that: The second pipeline (2) is connected to the filter housing (4) via a connecting assembly, the connecting assembly being capable of connecting multiple groups of pipelines, the connecting assembly comprising a connecting sleeve (23) fixedly connected to the surface of the filter housing (4), a pipeline connecting piece (24) being connected to the connecting sleeve (23), the pipeline connecting piece (24) being connected to the filter housing (4), a sleeve hole (25) being provided on the connecting sleeve (23) being connected to the pipeline connecting piece (24), the sleeve hole (25) being used to be connected to a sleeve (27), and the sleeve (27) being connected to the second pipeline (2); The connecting sleeve (23) is provided with a penetrating limiting hole (26).

8. The fracturing wellhead device with filtering function according to claim 7, characterized in that: The sleeve (27) is fixedly connected to the mounting plane, and a limiting shell (29) is fixedly connected to the mounting plane. The limiting shell (29) is arranged correspondingly to the limiting hole (26), and the limiting shell (29) can be inserted into the limiting hole (26).

9. The fracturing wellhead device with filtering function according to claim 8, characterized in that: A pressure plate (31) is provided at the end of the limiting shell (29), and the pressure plate (31) is fixedly connected to a pressure rod, and the pressure rod passes through the end surface of the limiting shell (29). One end of the pressure rod located at the limiting shell (29) is fixedly connected to a fixing block (33), and the fixing block (33) is slidably connected to the limiting shell (29). A connecting rod (32) is fixedly connected to the limiting shell (29), and a part of the connecting rod (32) passes through the side wall of the limiting shell (29). The connecting rod (32) is slidably connected to the limiting shell (29), and one end of the connecting rod (32) close to the installation plane is fixedly connected to a linkage plate (28).

10. The fracturing wellhead device with filtering function according to claim 9, characterized in that: A balancing plate (35) is arranged on the fixed block (33), and clamping blocks (30) are symmetrically arranged on both sides of the balancing plate (35). A hole for accommodating the clamping block (30) to pop out is arranged on the limiting shell (29), and the clamping block (30) is slidably connected to the fixed block (33). A spring (36) is arranged between the clamping block (30) and the balancing plate (35), and two ends of the spring (36) are respectively fixedly connected to the clamping block (30) and the balancing plate (35).

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