Fracturing wellhead device with filtering function

Abstract

The application discloses a fracturing wellhead device with a filtering function, which 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 screen cleaning assembly 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. 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, impurities are effectively prevented from entering the fracturing device, the filter screen cleaning assembly is arranged in the filter screen to clean the filter screen, the filter screen is effectively prevented from being blocked, and the smoothness of the filter screen is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of well killing manifold, in particular to a fracturing wellhead device with filtering function. BACKGROUND

[0002] The fracturing wellhead device is an important equipment combination for oil and gas well fracturing construction, and its main function is to safely and effectively deliver high-pressure liquid from the ground to the formation to achieve the purpose of oil reservoir fracturing. For low-yield oil fields, fracturing technology is needed to improve the yield of oil and gas fields, and high-pressure and high-efficiency fracturing wellhead devices are usually installed at the wellhead to achieve high-pressure and high-flow injection, thereby improving the hydraulic efficiency of the fracturing wellhead device.

[0003] The existing wellhead device lacks a filtering device. When oil is extracted, impurities in the oil may enter the fracturing device, causing blockage and affecting the use of the fracturing device. A small number of wellhead devices simply set up filter mesh pipes or meshes to achieve filtering, but it is not easy to clean when the filter mesh is blocked. SUMMARY

[0004] The present application provides a fracturing wellhead device with filtering function to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application is implemented by the following technical solutions:

[0006] A fracturing wellhead device with filtering function, comprising 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, and a mesh cleaning assembly 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 drive shaft is arranged inside the filter screen, the drive shaft is rotatably connected to the filter screen, and the drive shaft is partially located in the first pipeline, and one end of the drive shaft located in the first pipeline is fixedly connected with a drive impeller;

[0008] The drive shaft is composed of a plurality of reciprocating screw rods;

[0009] A plurality of threaded sleeves are threadedly engaged on the part of the drive shaft located in the filter screen, a rack is fixedly connected to the threaded sleeve, the rack is slidably connected to the filter screen, the rack is engaged with a gear, the gear is connected with the mesh cleaning assembly, the gear is rotatably connected to the mesh cleaning assembly, and the gear is used to drive the mesh cleaning assembly.

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

[0011] Preferably, two groups of second rotating shafts are symmetrically arranged on the fixed shell, the second rotating shafts are fixedly connected to the fixed shell, second rotating rods are rotatably connected to the second rotating shafts, the second rotating rods are rotatably connected to the rotating branches, the rotating branches are fixedly connected to the first cleaning head, the first cleaning head is provided with a flexible brush head, and the first cleaning head can abut against the inner wall of the filter screen.

[0012] Preferably, two groups 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 group of the first rotating shafts, and the driving block is fixedly connected to the gear;

[0013] Half gears are fixedly connected to the two groups of first rotating shafts, and the two groups of half gears are meshed;

[0014] A first rotating rod is fixedly connected to the first rotating shaft, and the first rotating rod is rotatably connected to a fixed rotating branch 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, and the first linkage rod is rotatably connected to the second cleaning head.

[0017] Preferably, the second pipeline is connected to the filter shell through a connecting assembly, the connecting assembly can connect multiple groups of pipelines, the connecting assembly comprises 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 filter shell, a sleeve hole that communicates with the pipeline connecting piece is arranged on the connecting sleeve, the sleeve hole is used to connect with a sleeve, and the sleeve communicates with the second pipeline.

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

[0019] Preferably, the sleeve is fixedly connected to a mounting plane, a limiting shell is fixedly connected to the mounting plane, the limiting shell is arranged in correspondence with the limiting hole, and the limiting shell can be inserted into the limiting hole.

[0020] Preferably, a pressing plate is arranged at the end of the limiting shell, the pressing plate is fixedly connected with a pressure rod, the pressure rod penetrates through the end face of the limiting shell, a fixed block is fixedly connected to one end of the pressure rod, the fixed block is slidably connected to the limiting shell, a connecting rod is fixedly connected to the fixed block, the connecting rod partially penetrates through the side wall of the limiting shell, the connecting rod is slidably connected to the limiting shell, and a linkage plate is fixedly connected to one end of the connecting rod close to the mounting plane.

[0021] Preferably, the fixing block is provided with a balance plate, the balance plate is symmetrically provided with clamping blocks on both sides, the limiting shell is provided with holes for accommodating the clamping blocks, the clamping blocks are slidably connected to the fixing block, and springs are arranged between the clamping blocks and the balance plate.

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

[0023] 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, impurities are effectively prevented from entering the fracturing device, the filter screen cleaning assembly is arranged in the filter screen to clean the filter screen, the filter screen is effectively prevented from being blocked, and the smoothness of the filter screen is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic view of the main structure of the present application;

[0025] Figure 2 It is a schematic view of the driving structure of the filter screen cleaning assembly of the present application;

[0026] Figure 3 It is a schematic view of the local structure of the filter screen cleaning assembly of the present application;

[0027] Figure 4 It is a schematic view of the structure of the filter screen cleaning assembly of the present application;

[0028] Figure 5 It is a schematic view of the structure of one end of the connecting assembly of the present application;

[0029] Figure 6 It is a schematic view of the structure of the other end of the connecting assembly of the present application;

[0030] Figure 7 It is a schematic view of the clamping block connecting structure of the present application.

[0031] In the figure: 1, first pipeline; 2, second pipeline; 3, filter screen; 4, filter shell; 5, filter screen cleaning assembly; 6, driving shaft; 7, driving 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, driving 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, fixing block; 34, sliding groove; 35, balance plate; 36, spring. DETAILED DESCRIPTION

[0032] In the present application, the description such as "first", "second" and the like is only for the purpose of description, and is not intended to particularly indicate the order or sequence, nor to limit the present application, which is merely to distinguish the protective assembly or operation described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features of various embodiments can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0033] Embodiment 1

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

[0035] The working principle and beneficial effects of the above scheme are as follows:

[0036] The present application sets a filter screen 3 between the first pipeline 1 and the second pipeline 2, filters the impurities between the first pipeline 1 and the second pipeline 2 through the filter screen 3, effectively avoids the impurities from entering the fracturing device, and sets a screen cleaning assembly 5 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 drive shaft 6 is arranged inside the filter screen 3, the drive shaft 6 is rotatably connected to the filter screen 3, a part 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 with a drive impeller 7.

[0039] The drive shaft 6 is composed of a plurality of reciprocating screw rods;

[0040] A plurality of threaded sleeves 8 are threadedly engaged on the part of the drive shaft 6 located in 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, the rack 9 is engaged with a gear wheel 10, the gear wheel 10 is connected with the screen cleaning assembly 5, the gear wheel 10 is rotatably connected to the screen cleaning assembly 5, and the gear wheel 10 is used to drive the screen cleaning assembly 5.

[0041] The screen cleaning assembly 5 is arranged on the fixed shell 11 arranged on the outer periphery of the driving shaft 6, the fixed shell 11 is rotationally connected to the driving shaft 6, and the fixed shell 11 is slidingly connected to the rack 9.

[0042] The fixed shell 11 is symmetrically provided with two groups of second rotating shafts 22, the second rotating shafts 22 are fixedly connected to the fixed shell 11, the second rotating shafts 22 are rotationally connected with second rotating rods 13, the second rotating rods 13 are rotationally connected with rotating branches 14, the rotating branches 14 are fixedly connected to the first cleaning head 15, the first cleaning head 15 is provided with a flexible brush head, and the first cleaning head 15 can abut against the inner wall of the filter screen 3.

[0043] The fixed shell 11 is symmetrically provided with two groups of first rotating shafts 21, the first rotating shafts 21 are rotationally connected to the fixed shell 11, one group of the first rotating shafts 21 is fixedly connected with a driving block 19, and the driving block 19 is fixedly connected with the gear 10.

[0044] The two groups of first rotating shafts 21 are fixedly connected with half gears 17, and the two groups of half gears 17 are engaged.

[0045] The first rotating shafts 21 are fixedly connected with first rotating rods 12, and the first rotating rods 12 are rotationally connected with the rotating branches 14 fixedly arranged on the first cleaning head 15.

[0046] The first rotating rods 12 are arranged in parallel with the second rotating rods 13.

[0047] The first rotating shafts 21 are fixedly connected with second linkage rods 20, the second linkage rods 20 are rotationally connected with the first linkage rods 18, and the first linkage rods 18 are rotationally connected to the second cleaning head 16.

[0048] The working principle and advantages of the above scheme are as follows:

[0049] The substance flowing between the first pipeline 1 and the second pipeline 2 drives the driving impeller 7 to rotate, and then drives the driving shaft 6 to rotate. Since the driving shaft 6 is composed of a plurality of reciprocating lead screws, the rotation of the driving shaft 6 drives the threaded sleeve 8 connected to the driving shaft 6 to move up and down reciprocally, and the rack 9 makes the gear 10 cyclically deflect by a certain angle, and then the driving block 19 makes the two groups of half gears 17 periodically swing, 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 the movement in the up-down direction of the surface of the filter screen 3, and the distance between the first cleaning head 15 and the filter screen 3 changes, which is compensated by the flexible brush head on the surface of the first cleaning head 15), and the second rotating rod 13 is parallel to the first rotating rod 12, which ensures that the first cleaning head 15 can always keep parallel to the surface of the filter screen 3 while swinging, and the flexible brush head on the surface of the first cleaning head 15 is always in contact with the filter screen 3 through deformation when the first cleaning head 15 swings, and cleans the surface of the filter screen 3.

[0050] The second cleaning head 16 is in reciprocating motion perpendicular to the filter screen 3 under the swing of the half gear 17, which slightly deforms the filter screen 3, and the filter screen 3 restores when the external force is lost, and the impurities on the filter screen 3 fall off in 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 is connected to the filter shell 4 through a connecting assembly, the connecting assembly can connect multiple groups of pipelines, the connecting assembly comprises a connecting sleeve 23 fixedly connected to the surface of the filter shell 4, a pipeline connecting piece 24 connected to the connecting sleeve 23, the pipeline connecting piece 24 being communicated in the filter shell 4, a sleeve hole 25 provided on the connecting sleeve 23 and communicated with the pipeline connecting piece 24, the sleeve hole 25 being used for connecting with a sleeve 27, and the sleeve 27 being communicated with the second pipeline 2.

[0053] The connecting sleeve 23 is provided with a limiting hole 26 penetrating through.

[0054] The sleeve 27 is fixedly connected to a mounting plane, a limiting shell 29 is fixedly connected to the mounting plane, the limiting shell 29 is correspondingly provided with the limiting hole 26, and the limiting shell 29 can be inserted into the limiting hole 26.

[0055] The end of the limiting shell 29 is provided with a pressing plate 31, the pressing plate 31 is fixedly connected with a pressure rod, the pressure rod penetrates the end face of the limiting shell 29, one end of the pressure rod located in the limiting shell 29 is fixedly connected with a fixed block 33, the fixed block 33 is slidingly connected in the limiting shell 29, the fixed block 33 is fixedly connected with a connecting rod 32, the connecting rod 32 partially penetrates the side wall of the limiting shell 29, the connecting rod 32 is slidingly connected with the limiting shell 29, one end of the connecting rod 32 close to the installation plane is fixedly connected with a linkage plate 28.

[0056] The fixed block 33 is provided with a balance plate 35, the balance plate 35 is symmetrically provided with a clamping block 30 on both sides, the limiting shell 29 is provided with a hole for accommodating the ejection of the clamping block 30, the clamping block 30 is slidingly connected with the fixed block 33, the clamping block 30 and the balance plate 35 are provided with a spring 36 therebetween, the spring 36 is fixedly connected at both ends with the clamping block 30 and the balance plate 35 respectively.

[0057] The working principle and beneficial effects of the above scheme are as follows:

[0058] The second pipeline 2 and the filter shell 4 are connected through the connecting assembly, so that the second pipeline 2 and the filter shell 4 can be quickly disassembled, thereby thoroughly cleaning or even replacing the filter screen 3 in the filter shell 4, and the connecting assembly can simultaneously connect multiple groups of pipelines, which is convenient and fast;

[0059] When the second pipeline 2 and the filter shell 4 are connected, the limiting shell 29 is inserted into the limiting hole 26, the limiting hole 26 extrudes 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 on the end face of the connecting sleeve 23, the sleeve 27 is inserted into the sleeve hole 25, and the connection of the two is completed;

[0060] When disassembling, the pressing plate 31 is pulled to move the clamping block 30, under the action of the side wall of the limiting shell 29, the clamping block 30 retracts in the limiting shell 29, the limitation on the connecting sleeve 23 is released, and the connecting sleeve 23 is continuously pulled out to separate the second pipeline 2 and the filter shell 4, at this time, the filter screen 3 can be replaced or cleaned.

[0061] It is apparent for those skilled in the art that the present application 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 essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A fracturing wellhead device with filtering function, characterized in that, it 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 shell (4) is arranged outside the filter screen (3), a filter screen 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 shell (4) outside the filter screen (3); the second pipeline (2) and the filter shell (4) are connected through a connecting assembly, the connecting assembly can connect multiple groups of pipelines, the connecting assembly comprises a connecting sleeve (23) fixedly connected to the surface of the filter shell (4), a pipeline connecting piece (24) connected to the connecting sleeve (23), the pipeline connecting piece (24) being communicated with the filter shell (4), a sleeve hole (25) provided on the connecting sleeve (23) and communicated with the pipeline connecting piece (24), the sleeve hole (25) being used for connecting with a sleeve pipe (27), and the sleeve pipe (27) being communicated with the second pipeline (2); the connecting sleeve (23) is provided with a limiting hole (26) penetrating therethrough; the sleeve pipe (27) is fixedly connected to a mounting plane, a limiting shell (29) is fixedly connected to the mounting plane, the limiting shell (29) is arranged in correspondence with the limiting hole (26), and the limiting shell (29) can be inserted into the limiting hole (26); an pressing plate (31) is arranged at the end of the limiting shell (29), the pressing plate (31) is fixedly connected with a pressure rod, the pressure rod penetrates through the end face of the limiting shell (29), one end of the pressure rod located in the limiting shell (29) is fixedly connected with a fixed block (33), the fixed block (33) is slidingly connected in the limiting shell (29), a connecting rod (32) is fixedly connected to the fixed block (33), the connecting rod (32) partially penetrates through the side wall of the limiting shell (29), the connecting rod (32) is slidingly connected to the limiting shell (29), and one end of the connecting rod (32) close to the mounting plane is fixedly connected with a linkage plate (28); a balance plate (35) is arranged on the fixed block (33), clamping blocks (30) are symmetrically arranged on the two sides of the balance plate (35), holes for accommodating the clamping blocks (30) to pop out are arranged on the limiting shell (29), the clamping blocks (30) are slidingly connected to the fixed block (33), springs (36) are arranged between the clamping blocks (30) and the balance plate (35), and the two ends of the spring (36) are fixedly connected to the clamping blocks (30) and the balance plate (35) respectively.

2. The 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 rotationally connected to the filter screen (3), the drive shaft (6) partially locates in the first pipeline (1), and a drive impeller (7) is fixedly connected to one end of the drive shaft (6) located in the first pipeline (1); the drive shaft (6) is composed of a plurality of reciprocating screw rods. The threaded sleeve (8) is fixedly connected with the rack (9), the rack (9) is slidably connected to the filter screen (3), the rack (9) is engaged with the gear (10), the gear (10) is connected with the screen cleaning assembly (5), the gear (10) is rotatably connected in the screen cleaning assembly (5), and the gear (10) is used for driving the screen cleaning assembly (5).

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

4. The fracturing wellhead device with a filtering function according to claim 3, characterized in that, The fixed shell (11) is symmetrically provided with two groups of second rotating shafts (22), the second rotating shafts (22) are fixedly connected to the fixed shell (11), the second rotating shafts (22) are rotatably connected with second rotating rods (13), the second rotating rods (13) are rotatably connected with rotating branches (14), the rotating branches (14) are fixedly connected to first cleaning heads (15), the first cleaning heads (15) are provided with flexible brush heads, and the first cleaning heads (15) can abut against the inner wall of the filter screen (3).

5. The fracturing wellhead device with a filtering function according to claim 4, characterized in that, The fixed shell (11) is symmetrically provided with two groups of first rotating shafts (21), the first rotating shafts (21) are rotatably connected to the fixed shell (11), one group of the first rotating shafts (21) is fixedly connected with driving blocks (19), and the driving blocks (19) are fixedly connected with the gear (10); The two groups of first rotating shafts (21) are fixedly connected with half gears (17), and the two groups of half gears (17) are engaged; The first rotating shafts (21) are fixedly connected with first rotating rods (12), and the first rotating rods (12) are rotatably connected with the rotating branches (14) fixedly arranged on the first cleaning heads (15); The first rotating rods (12) and the second rotating rods (13) are arranged in parallel.

6. The fracturing wellhead device with a filtering function according to claim 5, characterized in that, The first rotating shafts (21) are fixedly connected with second linkage rods (20), the second linkage rods (20) are rotatably connected with first linkage rods (18), and the first linkage rods (18) are rotatably connected to second cleaning heads (16).

Images