Sand control fracturing wellhead device

Abstract

The application discloses a sand prevention and fracturing wellhead device, relates to the technical field of oil exploitation, and aims to solve the problems of easy plugging of a filter screen, low cleaning efficiency and poor adaptability. The device comprises a sand prevention shell, which is internally provided with a tilting rotating cylinder type filter separator (connected with a driving motor II and a sand discharging port) and a filter screen provided with a brush plate; a self-adaptive dredging assembly (containing a limiting support, a mounting support provided with a dredging unit, and the dredging unit being capable of dredging filter holes through pressure exertion of a rubber ball, adjustable spacing and abutting force) is arranged; and a linkage cleaning assembly (a driving motor I is arranged in a sealing vertical column, a driving screw is arranged, a driving member is linked to drive a rack three, a gas collecting disc is driven to wash the filter screen and rotate the brush plate to clean sundries, and linkage blocking plates are driven to open and close to discharge sundries through a gear and a rack) is further arranged. The application realizes double filtration and efficiency improvement, centrifugal separation of impurities and oil liquid adhesion, self-adaptive dredging of different separators, linkage cleaning of single driving to complete multiple actions, no need of production stop, adaptation of cleaning tools and extension of the service life of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil exploitation, in particular to a sand prevention and fracturing wellhead device. BACKGROUND

[0002] In the field of oil exploitation, fracturing technology is a key technical means to improve oil well production, which injects fracturing sand into the formation through high-pressure equipment to improve the oil flow channel. In this process, a large amount of sand impurities will be mixed in the oil exploitation fluid, which not only easily erodes the inner wall of the wellhead device, shortens the service life of the equipment, but also blocks the filter screen structure, causing the filtration efficiency to decrease, and thus affecting the continuity of fracturing operation and the quality of oil transportation. Therefore, the maintenance of the filter screen in the sand prevention and fracturing wellhead device has become a core requirement to ensure the stability of the operation.

[0003] In the existing patent "CN202510912571-Sand prevention and fracturing wellhead device", the device mainly realizes oil transportation through the communication structure of the main pipe and the branch pipe. The installation ring with the first filter screen is slidably installed in the branch pipe, the installation ring is moved by the second extension piece, the impurities are separated from the first filter screen by using the inertia of the impurities, the filtered oil is transported to the communication cavity by the oil pump, the high-speed oil is sprayed out through the oil injection pipe to push the impurities to the communication groove, and the directional flow channel is formed by the first rotating plate, the second rotating plate and the corresponding baffle to guide the impurities to enter the temporary storage box with the oil; the push plate in the temporary storage box is driven by the first extension piece to return the oil in the temporary storage box to the branch pipe through the return oil pipe (the impurities are filtered by the second filter screen), and the impurities are left in the storage box, and finally discharged through the discharge pipe. Although the device realizes the function of cleaning the filter screen without stopping the oil transportation, there are still many technical problems in actual application:

[0004] First, the cleaning completeness of the filter screen is insufficient. The cleaning of the first filter screen in the device mainly depends on two aspects: one is that the inertia of the impurities caused by the rapid movement of the installation ring makes the impurities separate from the surface of the filter screen; the other is that the high-speed oil sprayed out of the oil injection pipe pushes the impurities to gather and enter the temporary storage box along the flow channel. However, for stubborn sand impurities embedded in the pores of the first filter screen, it is difficult to effectively remove them by inertia and high-speed oil flushing, and the problem of pore blockage will still accumulate after long-term use, resulting in gradual decrease of the filtering effect of the filter screen, which cannot meet the demand of long-term stable operation.

[0005] Second, the cleaning tool has poor adaptability. The impurity cleaning process of the device depends on its own structure (oil injection pipe, directional flow channel, etc.), and no structure is designed to be flexibly connected with external cleaning tools. When the filter screen pores are seriously blocked and need to be cleaned by a high-pressure air pump or a special liquid pump, the device cannot directly adapt to external tools and can only rely on its own cleaning ability, which limits its applicability in complex working conditions.

[0006] The existence of the above problems leads to that the existing sand prevention and fracturing wellhead device still has a large room for improvement in terms of cleaning thoroughness and working condition adaptability. Therefore, the present application provides a sand prevention and fracturing wellhead device to solve one or more of the above problems. SUMMARY

[0007] (I) Technical problems solved

[0008] In view of the deficiencies of the prior art, the present application provides a sand prevention and fracturing wellhead device to solve the problems raised in the background art.

[0009] (II) Technical solutions

[0010] To achieve the above purposes, the present application is implemented by the following technical solutions, including a sand prevention shell, a cylindrical filter separator and a filter screen are installed in the sand prevention shell, a self-adaptive dredging assembly is arranged at the top of the cylindrical filter separator, a linkage cleaning assembly is arranged at the bottom of the filter screen, a brush plate is installed at the top of the filter screen, a sand outlet and an oil outlet are arranged at the bottom of the sand prevention shell, and a sand discharge port is arranged in the side wall of the sand prevention shell.

[0011] Preferably, the cylindrical filter separator is arranged obliquely, and the cylindrical filter separator is rotatably connected with the sand prevention shell, one end of the cylindrical filter separator is fixedly connected with the second output shaft of the driving motor, and the other end of the cylindrical filter separator is in communication with the sand discharge port.

[0012] Preferably, an electromagnetic valve is arranged on each of the sand outlet, the oil outlet and the sand discharge port.

[0013] Preferably, the second driving motor is installed on the outer wall of the sand prevention shell through a motor support, and an oil supply port is arranged in the outer wall of the sand prevention shell and in communication with the cylindrical filter separator.

[0014] Preferably, an avoidance groove for accommodating the linkage blocking plate is arranged on the filter screen, and the inner wall of the avoidance groove is arranged as an inclined surface near one side of the linkage blocking plate, and the side of the linkage blocking plate near the linkage cleaning assembly is matched with the inclined surface.

[0015] Preferably, the self-adaptive dredging assembly includes a limiting support and a mounting support, two groups of limiting supports are fixedly arranged at both ends of the inner wall of the sand prevention shell, and the mounting support is respectively installed in the two groups of limiting supports, a guide block is fixedly arranged on the inner wall of the limiting support, the mounting support is movably connected with the guide block, a T-shaped screw rod one is connected with the limiting support, and the mounting support is threadedly sleeved on the outer wall of the T-shaped screw rod one, and a plurality of groups of dredging units are installed on the mounting support at equal intervals.

[0016] Preferably, the dredging unit comprises a mounting column fixedly connected with the mounting support, a limiting plate one and a limiting plate two movably arranged in the mounting column, a T-shaped screw two threadedly connected with the mounting column, an end of the T-shaped screw two extending into the mounting column movably connected with the limiting plate one, a guide column one end fixedly connected with the bottom of the limiting plate one, the other end of the guide column movably penetrating through the limiting plate two and extending into a U-shaped column, a connecting spring one sleeved on the outer wall of the guide column, and the two ends of the connecting spring one fixedly connected with the limiting plate one and the limiting plate two respectively, one end of the U-shaped column movably extending into the mounting column, the other end of the U-shaped column fixedly provided with a rubber ball, and the diameter of the rubber ball slightly larger than the diameter of the filter hole of the cylindrical filter separator.

[0017] Preferably, the linkage cleaning assembly comprises a sealing column, one end of the sealing column fixedly connected with the center of the filter screen, the other end of the sealing column fixedly connected with the bottom of the inner wall of the sand-proof shell, the sealing column internally provided with a mounting groove one, a mounting groove two, a communication groove, a mounting groove three, a mounting groove four, a mounting groove five and a mounting groove six, the outer wall of the sealing column fixedly provided with a support, the bottom of the shell of the sand-proof shell fixedly embedded with a driving motor one, the output shaft of the driving motor one movably extending into the mounting groove one, one end of a driving screw fixedly connected with the output shaft of the driving motor one, the other end of the driving screw movably connected with the inner wall of the mounting groove one, a driving member threadedly sleeved on the outer wall of the driving screw, a driving rack three movably mounted in the mounting groove four, and one end of the driving rack three fixedly connected with the driving member, the other end of the driving rack three connected with the inner wall of the mounting groove four through a connecting spring three.

[0018] Preferably, the mounting groove two is internally provided with a control rod and a connecting spring two, one end of the control rod and the connecting spring two connected with the inner wall of the mounting groove two, the other end of the control rod movably extending into the mounting groove one, the control rod provided with a through hole one;

[0019] The mounting groove five is movably provided with a gas collecting disc, one end of a second connecting rod fixedly connected with the gas collecting disc, the other end of the second connecting rod movably extending into the mounting groove four and fixedly sleeved with a driving gear one, and the driving gear one engaged with the driving rack three, the gas collecting disc provided with a through hole two at the top and coinciding with the communication groove, and the bottom of the gas collecting disc provided with a plurality of groups of through holes three.

[0020] The mounting groove three is internally provided with a first connecting rod, a bevel gear one and a bevel gear two, one end of the first connecting rod fixedly sleeved with the bevel gear two, the other end of the first connecting rod movably extending out of the sealing column and fixedly connected with a brush plate, one end of a third connecting rod fixedly sleeved with the bevel gear one, the other end of the third connecting rod movably extending into the mounting groove four and fixedly sleeved with a driving gear two, and the driving gear two engaged with the driving rack three, the bevel gear one engaged with the bevel gear two.

[0021] Preferably, gear grooves, guide grooves and limiting grooves are arranged in the support, a driving gear three is movably arranged in the gear groove, a driving rack one is movably arranged in the limiting groove, and the driving rack one and the inner wall of the limiting groove are connected through a connecting spring four, the bottom of the driving rack one is connected with the driving part through a fixed rod one, a driving rack two is movably arranged in the guide groove, one end of the driving rack two close to the linkage stop plate is rotatably connected with the linkage stop plate, the driving rack one and the driving rack two are engaged with the driving gear three, one end of the fourth connecting rod close to the linkage stop plate is fixedly connected with the linkage stop plate, a guide support wheel is arranged on one side of the fourth connecting rod close to the support, a guide camber is arranged on one side of the support close to the guide support wheel, and the guide support wheel abuts against the guide camber.

[0022] Compared with the prior art, the beneficial effects of the present application are that: the present application synchronously triggers the on-off of the communication groove, the rotation of the gas collecting disc, the rotation of the brush plate, the opening and closing of the linkage stop plate and other multiple actions through a single driving motor, greatly simplifies the driving structure of the device and reduces the risk of failure, and adopts a dual cleaning mode of "high-pressure gas / liquid flushing + brush plate mechanical scraping", which is more thorough in cleaning stubborn blockages in the filter screen pores, and can also flexibly dock various cleaning tools, and through the cooperation of the linkage stop plate and the sand outlet electromagnetic valve, impurities are directionally discharged, avoiding the secondary accumulation of impurities to wear the parts. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a front view structural schematic diagram of the present application;

[0024] Figure 2 It is a partial structure schematic diagram of the self-adaptive dredging assembly in the present application;

[0025] Figure 3 It is a structure schematic diagram of the dredging unit in the present application;

[0026] Figure 4 It is a structure schematic diagram of the filter screen in the present application;

[0027] Figure 5 It is a partial structure schematic diagram of the linkage cleaning assembly in the present application Figure 1 .

[0028] Figure 6 It is a structure schematic diagram of the gas collecting disc in the present application;

[0029] Figure 7 It is a partial structure schematic diagram of the linkage cleaning assembly in the present application Figure 2 .

[0030] In the figure: 1, sand prevention shell; 2, cylindrical filter separator; 3, self-adaptive dredging assembly; 4, filter screen; 5, linkage blocking plate; 6, brush plate; 7, linkage cleaning assembly; 8, driving motor one; 9, sand outlet; 10, oil outlet; 11, oil inlet; 12, driving motor two; 13, motor support; 14, sand discharge port; 15, limiting support; 16, mounting support; 17, T-shaped screw one; 18, guide block; 19, dredging unit; 20, mounting column; 21, T-shaped screw two; 22, limiting plate one; 23, guide column; 24, connecting spring one; 25, limiting plate two; 26, U-shaped column; 27, rubber ball; 28, inclined surface; 29, sealing column; 30, first connecting rod; 31, driving piece; 32, mounting groove one; 33, mounting groove two; 34, communication groove; 35, mounting groove three; 36, mounting groove four; 37, fixed rod one; 38, driving screw; 39, control rod; 40, through hole one; 41, connecting spring two; 42, second connecting rod; 43, mounting groove five; 44, driving gear one; 45, gas collection disc; 46, third connecting rod; 47, driving gear two; 48, bevel gear one; 49, bevel gear two; 50, connecting spring three; 51, through hole two; 52, through hole three; 53, support piece; 54, gear groove; 55, guide groove; 56, connecting spring four; 57, limiting groove; 58, driving rack one; 59, driving gear three; 60, driving rack two; 61, fourth connecting rod; 62, guide support wheel; 63, driving rack three; 64, guide camber. DETAILED DESCRIPTION

[0031] In the present application, the description such as "first", "second" and the like is only for the purpose of description, and does not mean 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 implying 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 to be 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.

[0032] Embodiment 1

[0033] Please refer to Figure 1The application provides a technical means, which comprises a sandproof shell 1, a cylindrical filter separator 2 and a filter screen 4 are installed in the sandproof shell 1, the top of the cylindrical filter separator 2 is provided with a self-adaptive dredging assembly 3, the bottom of the filter screen 4 is provided with a linkage cleaning assembly 7, the top of the filter screen 4 is provided with a brush plate 6, the bottom of the sandproof shell 1 is provided with a sand outlet 9 and an oil outlet 10, and the sidewall of the sandproof shell 1 is provided with a sand discharge port 14.

[0034] Further, the cylindrical filter separator 2 is arranged in an inclined mode and is rotationally connected with the sandproof shell 1, one end of the cylindrical filter separator 2 is fixedly connected with an output shaft of a driving motor 12, and the other end of the cylindrical filter separator 2 is in communication with the sand discharge port 14.

[0035] Further, the sand outlet 9, the oil outlet 10 and the sand discharge port 14 are all provided with electromagnetic valves.

[0036] Further, the driving motor 12 is installed on the outer wall of the sandproof shell 1 through a motor support 13, an oil supply port 11 is formed in the outer wall of the sandproof shell 1 and is in communication with the cylindrical filter separator 2.

[0037] Further, the filter screen 4 is provided with an avoiding groove for accommodating the linkage blocking plate 5, the inner wall of the avoiding groove is provided with an inclined surface 28 close to one side of the linkage blocking plate 5, and the side of the linkage blocking plate 5 close to the linkage cleaning assembly 7 is matched with the inclined surface 28.

[0038] The working principle and beneficial effects of the above scheme are: during the process of oil liquid being delivered to the cylindrical filter separator 2 through the oil inlet 11, the cylindrical filter separator 2 continuously rotates under the driving of the driving motor 12, impurities larger than the filter holes on the cylindrical filter separator 2 will be accumulated in the cylindrical filter separator 2, and the remaining small impurities will fall onto the filter screen 4 for secondary filtration, so as to improve the separation efficiency and greatly save resources. When the impurities in the cylindrical filter separator 2 accumulate to a certain quality, the oil inlet 11 is closed while the cylindrical filter separator 2 continuously rotates, and under the action of centrifugal force, the petroleum adhered to the impurities in the cylindrical filter separator 2 can be separated from the impurities, thereby greatly increasing the oil liquid filtration efficiency. Subsequently, the electromagnetic valve in the sand outlet 14 is opened to discharge the accumulated impurities, and then the sand outlet 14 is closed and the oil inlet 11 is opened for the next round of separation and filtration. At the same time, the electromagnetic valve in the oil outlet 10 is opened, and the oil liquid passing through the filter screen 4 is discharged through the oil outlet 10. After the above multiple cycles, a large amount of small impurities will inevitably accumulate on the filter screen 4. At this time, the oil inlet 11 is closed, and the linkage cleaning assembly 7 is started to clean the filter screen 4 with the brush plate 6 while inert gas is injected from below the filter screen 4, so as to flush away the clogged filter screen 4 and improve the cleaning efficiency of the brush plate 6. At the same time, the linkage cleaning assembly 7 can open the linkage blocking plate 5, so that the brush plate 6 can conveniently push the impurities on the filter screen 4 from the place, and the electromagnetic valve installed on the sand outlet 9 is opened to facilitate the discharge of sand and other impurities.

[0039] Example 2

[0040] Based on example 1, please refer to Figures 1-3 The adaptive dredging assembly 3 includes a limiting support 15 and a mounting support 16. Two groups of limiting supports 15 are fixedly arranged at both ends of the inner wall of the sand prevention shell 1, and the mounting support 16 is mounted in the two groups of limiting supports 15 at both ends, respectively. A guide block 18 is fixedly arranged on the inner wall of the limiting support 15, and the mounting support 16 is movably connected with the guide block 18. A T-shaped screw rod 17 is connected with the limiting support 15, and the mounting support 16 is threadedly sleeved on the outer wall of the T-shaped screw rod 17. A plurality of groups of dredging units 19 are installed on the mounting support 16 at equal intervals.

[0041] The further dredging unit 19 comprises a mounting column 20 fixedly connected with the mounting support 16, a limiting plate one 22 and a limiting plate two 25 movably arranged in the mounting column 20, a T-shaped screw two 21 threadedly connected with the mounting column 20, and the T-shaped screw two 21 movably connected with the limiting plate one 22 at an end extending into the mounting column 20, a guide column 23 fixedly connected with a bottom of the limiting plate one 22 at one end, movably penetrating through the limiting plate two 25 and extending into a U-shaped column 26 at the other end, a connecting spring one 24 sleeved on an outer wall of the guide column 23 and fixedly connected with the limiting plate one 22 and the limiting plate two 25 at two ends respectively, the U-shaped column 26 movably extending into the mounting column 20 at one end, and a rubber ball 27 fixedly arranged on the U-shaped column 26 at the other end.

[0042] Preferably, the rubber ball 27 has a diameter slightly larger than that of the filter hole of the cylindrical filter separator 2.

[0043] Preferably, a driving ring is movably arranged in the limiting plate one 22, and the T-shaped screw two 21 extends into the limiting plate one 22 at a bottom and is fixedly connected with the driving ring.

[0044] Preferably, the rubber ball 27 is connected with the U-shaped column 26 through screwing, so as to facilitate replacement of the rubber ball 27.

[0045] Preferably, the communication groove 34 also penetrates through the bottom of the sand-proof shell 1.

[0046] The working principle and beneficial effects of the above scheme are: due to the inevitable blockage of a part of the filter holes during the long-term filtering process of the cylindrical filter separator 2, since the diameter of the rubber ball 27 is slightly larger than the diameter of the filter holes of the cylindrical filter separator 2, when the cylindrical filter separator 2 rotates, the rubber ball 27 will press each group of filter holes when passing through, thereby continuously unblocking the filter holes, and the distance between the mounting bracket 16 and the cylindrical filter separator 2 can be adjusted by rotating the T-shaped screw rod one 17, thereby being suitable for cylindrical filter separators 2 of different sizes, the limiting plate one 22 can be pushed to rotate in the mounting column 20 by rotating the T-shaped screw rod two 21 (a driving ring is movably arranged in the limiting plate one 22, the T-shaped screw rod two 21 extends to the inside of the limiting plate one 22 and is fixedly connected with the driving ring, so that the T-shaped screw rod two 21 and the limiting plate one 22 will not be separated without affecting the rotation of the T-shaped screw rod two 21, thereby facilitating the T-shaped screw rod two 21 to push the limiting plate one 22 to move), thereby the length of the guide column 23 extending to the U-shaped column 26 can be controlled, thereby the compression amount of the connecting spring one 24 can be controlled, at this time the abutting force between the rubber ball 27 and the cylindrical filter separator 2 is changed (the compression of the connecting spring one 24 increases, and the extension of the connecting spring one 24 decreases), when the cylindrical filter separator 2 rotates and the rubber ball 27 coincides with the blocked filter hole, the connecting spring one 24 will push the U-shaped column 26 to move through the limiting plate two 25, thereby the rubber ball 27 gives the blocked filter hole an instantaneous pressure to knock off the impurities and unblock, and when the rubber ball 27 is worn, the position of the sleeve mounting bracket 16 and the limiting plate one 22 can be adjusted so that the rubber ball 27 always abuts against the cylindrical filter separator 2.

[0047] Embodiment 3

[0048] On the basis of any one of embodiments 1-2, please refer to Figures 4-7 , the linkage cleaning assembly 7 comprises a sealing column 29, one end of the sealing column 29 is fixedly connected with the center of the filter screen 4, the other end of the sealing column 29 is fixedly connected with the bottom inner wall of the sand prevention shell 1, the sealing column 29 is provided with a mounting groove one 32, a mounting groove two 33, a communication groove 34, a mounting groove three 35, a mounting groove four 36 and a mounting groove five 43, a supporting piece 53 is fixedly arranged on the outer wall of the sealing column 29, a driving motor one 8 is fixedly embedded in the bottom shell of the sand prevention shell 1, the output shaft of the driving motor one 8 movably extends to the mounting groove one 32, a driving screw rod 38 is fixedly connected with the output shaft of the driving motor one 8 at one end, the other end of the driving screw rod 38 is movably connected with the inner wall of the mounting groove one 32, a driving piece 31 is threadedly sleeved on the outer wall of the driving screw rod 38, a driving rack three 63 is movably installed in the mounting groove four 36, and one end of the driving rack three 63 is fixedly connected with the driving piece 31, the other end of the driving rack three 63 is connected with the inner wall of the mounting groove four 36 through a connecting spring three 50.

[0049] Further, the mounting groove two 33 is provided with a control rod 39 and a connecting spring two 41, one end of the control rod 39 is connected with the connecting spring two 41 and the inner wall of the mounting groove two 33, the other end of the control rod 39 extends into the mounting groove one 32, and a through hole one 40 is formed in the control rod 39;

[0050] The mounting groove five 43 movably provided with a gas collecting disc 45, one end of the second connecting rod 42 is fixedly connected with the gas collecting disc 45, the other end of the second connecting rod 42 extends into the mounting groove four 36 and is fixedly sleeved with a driving gear one 44, the driving gear one 44 is engaged with the driving rack three 63, a through hole two 51 is formed in the top of the gas collecting disc 45 and coincides with the communication groove 34, and a plurality of groups of through holes three 52 are formed in the bottom of the gas collecting disc 45.

[0051] The mounting groove three 35 is provided with a first connecting rod 30, a bevel gear one 48 and a bevel gear two 49, one end of the first connecting rod 30 is fixedly sleeved with the bevel gear two 49, the other end of the first connecting rod 30 extends out of the sealing stand 29 and is fixedly connected with the brush plate 6, one end of the third connecting rod 46 is fixedly sleeved with the bevel gear one 48, the other end of the third connecting rod 46 extends into the mounting groove four 36 and is fixedly sleeved with a driving gear two 47, the driving gear two 47 is engaged with the driving rack three 63, and the bevel gear one 48 is engaged with the bevel gear two 49.

[0052] Further, the support piece 53 is provided with a gear groove 54, a guide groove 55 and a limiting groove 57, the driving gear three 59 is movably installed in the gear groove 54, the driving rack one 58 is movably provided in the limiting groove 57, and the driving rack one 58 is connected with the inner wall of the limiting groove 57 through the connecting spring four 56, the bottom of the driving rack one 58 is connected with the driving piece 31 through the fixed rod one 37, the driving rack two 60 is movably provided in the guide groove 55, one end of the driving rack two 60 close to the linkage baffle 5 is rotatably connected with the linkage baffle 5, the driving rack one 58 and the driving rack two 60 are engaged with the driving gear three 59, one end of the fourth connecting rod 61 close to the linkage baffle 5 is fixedly connected with the linkage baffle 5, the fourth connecting rod 61 is provided with a guide support wheel 62 on one side close to the support piece 53, the support piece 53 is provided with a guide arc surface 64 on one side close to the guide support wheel 62, and the guide support wheel 62 abuts against the guide arc surface 64.

[0053] The working principle and beneficial effects of the above scheme are: in use, the driving motor 8 is started to drive the driving screw 38 to rotate, and then the driving member 31 moves upward along the driving screw 38, at this time, since the side of the driving member 31 close to the control rod 39 is a slope, when the driving member 31 approaches the control rod 39, the control rod 39 is pushed into the installation slot 33 and the connecting spring 41 is compressed, and when the driving member 31 just moves to the top, the through hole 40 coincides with the communication groove 34, so that the communication groove 34 is communicated with the outside, which is convenient for the communication groove 34 to connect any cleaning tool;

[0054] At the same time, the driving member 31 pushes the driving rack 63 to move upward synchronously, and synchronously pushes the driving gear 44 and the driving gear 47 to rotate, the driving gear 44 drives the gas collecting disc 45 to rotate through the second connecting rod 42, until the gas collecting disc 45 rotates 180 degrees to make the through hole 51 communicate with the communication groove 34, a plurality of through holes 52 are located below the filter screen 4, at this time, only by connecting the air pump or liquid pump below the sandproof shell 1 to make the air pump or liquid pump communicate with the communication groove 34, high-pressure gas or liquid can enter the communication groove 34 through the through hole 40 and the through hole 51, and then enter the gas collecting disc 45, and then wash the filter screen 4 from top to bottom through the through hole 52, so as to dredge and clean the filter screen 4;

[0055] At the same time, the driving gear 47 drives the bevel gear 48 to rotate through the third connecting rod 46, the bevel gear 48 drives the first connecting rod 30 to rotate through the bevel gear 49, and then the brush plate 6 can be driven to rotate on the surface of the filter screen 4, so as to clean the impurities accumulated on the filter screen 4 and push them to the avoidance groove provided with the linkage baffle 5 while the gas collecting disc washes the filter screen 4;

[0056] At the same time, the fixed rod 37 will synchronously push the driving rack 58 to move upward along the limiting groove 57, and then the driving rack 60 is driven to move obliquely downward along the guide groove 55 through the driving gear 59, so that the linkage baffle 5 moves downward synchronously, and when the guide support wheel 62 moves to the guide arc surface 64 along the support member 53, the linkage baffle 5 will rotate around the driving rack 60, through the above operation, the avoidance groove opened on the filter screen 4 is opened, so that the impurities on the filter screen 4 can be pushed off from the avoidance groove by the brush plate 6, and at this time, the electromagnetic valve installed on the sand outlet 9 is opened to facilitate the discharge of sand and other impurities.

[0057] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A sand-prevention fracturing wellhead device, characterized in that, Includes a sandproof shell (1), inside which a cylindrical filter separator (2) and a filter screen (4) are installed. The top of the cylindrical filter separator (2) is equipped with an adaptive unblocking component (3), the bottom of the filter screen (4) is equipped with a linkage cleaning component (7), the top of the filter screen (4) is equipped with a brush plate (6), the bottom of the sandproof shell (1) is provided with a sand outlet (9) and an oil outlet (10), and the side wall of the sandproof shell (1) is provided with a sand discharge port (14). The adaptive unblocking component (3) includes a limiting bracket (15) and an installation bracket (16). Two sets of limiting brackets (15) are fixedly installed at both ends of the inner wall of the sandproof shell (1), and the two ends of the installation bracket (16) are respectively installed inside the two sets of limiting brackets (15). A guide block (18) is fixedly provided on the inner wall of the limiting bracket (15). The installation bracket (16) is movably connected to the guide block (18). The first T-screw (17) is connected to the limiting bracket (15), and the installation bracket (16) is threaded onto the outer wall of the first T-screw (17). Several sets of unblocking units (19) are installed at equal intervals on the installation bracket (16). The linkage cleaning component (7) includes a sealing column (29). One end of the sealing column (29) is fixedly connected to the center of the filter screen (4), and the other end of the sealing column (29) is fixedly connected to the bottom of the inner wall of the sandproof shell (1). The sealing column (29) has an installation groove 1 (32), an installation groove 2 (33), a connecting groove (34), an installation groove 3 (35), an installation groove 4 (36), and an installation groove 5 (43). A support member (53) is fixedly provided on the outer wall of the sealing column (29). A drive motor 1 (8) is fixedly embedded in the bottom shell of the sandproof shell (1). The output shaft of motor 1 (8) extends movably to the mounting slot 1 (32). One end of the drive screw (38) is fixedly connected to the output shaft of the drive motor 1 (8), and the other end of the drive screw (38) is movably connected to the inner wall of the mounting slot 1 (32). The drive component (31) is threaded onto the outer wall of the drive screw (38). The drive rack 3 (63) is movably installed in the mounting slot 4 (36), and one end of the drive rack 3 (63) is fixedly connected to the drive component (31). The other end of the drive rack 3 (63) is connected to the inner wall of the mounting slot 4 (36) through the connecting spring 3 (50). The second mounting slot (33) is provided with a control rod (39) and a connecting spring (41). One end of the control rod (39) is connected to the inner wall of the second mounting slot (33) via the connecting spring (41). The other end of the control rod (39) extends movably into the first mounting slot (32). A through hole (40) is provided on the control rod (39). An air collecting plate (45) is movably installed in the mounting slot five (43). One end of the second connecting rod (42) is fixedly connected to the air collecting plate (45), and the other end of the second connecting rod (42) extends movably into the mounting slot four (36) and is fixedly sleeved with a drive gear one (44). The drive gear one (44) meshes with the drive rack three (63). A through hole two (51) is opened at the top of the air collecting plate (45) and at the position that coincides with the connecting slot (34). Several sets of through holes three (52) are opened at the bottom of the air collecting plate (45). The mounting slot 3 (35) is provided with a first connecting rod (30), a bevel gear 1 (48) and a bevel gear 2 (49). One end of the first connecting rod (30) is fixedly sleeved with bevel gear 2 (49), and the other end of the first connecting rod (30) extends movably out of the sealing column (29) and is fixedly connected to the brush plate (6). One end of the third connecting rod (46) is fixedly sleeved with bevel gear 1 (48), and the other end of the third connecting rod (46) extends movably into the mounting slot 4 (36) and is fixedly sleeved with drive gear 2 (47). The drive gear 2 (47) meshes with the drive rack 3 (63), and bevel gear 1 (48) meshes with bevel gear 2 (49).

2. The sand-prevention fracturing wellhead device according to claim 1, characterized in that, The cylindrical filter separator (2) is set at an angle and is rotatably connected to the sandproof shell (1). One end of the cylindrical filter separator (2) is fixedly connected to the output shaft of the second drive motor (12), and the other end of the cylindrical filter separator (2) is connected to the sand discharge port (14).

3. The sand-prevention fracturing wellhead device according to claim 1, characterized in that, Solenoid valves are provided on the sand outlet (9), oil outlet (10) and sand discharge outlet (14).

4. The sand-prevention fracturing wellhead device according to claim 2, characterized in that, The second drive motor (12) is installed on the outer wall of the sandproof shell (1) via the motor bracket (13). The outer wall of the sandproof shell (1) is provided with an oil supply port (11), and the oil supply port (11) is connected to the cartridge filter separator (2).

5. A sand-prevention fracturing wellhead device according to claim 1, characterized in that, The filter screen (4) has a clearance groove for accommodating the linkage blockage plate (5), and the inner wall of the clearance groove is set as an inclined surface (28) on the side close to the linkage blockage plate (5), and the side of the linkage blockage plate (5) close to the linkage cleaning component (7) matches the inclined surface (28).

6. The sand-prevention fracturing wellhead device according to claim 1, characterized in that, The unblocking unit (19) includes a mounting column (20), which is fixedly connected to the mounting bracket (16). A limiting plate 1 (22) and a limiting plate 2 (25) are movably disposed within the mounting column (20). A T-shaped screw 2 (21) is threadedly connected to the mounting column (20), and one end of the T-shaped screw 2 (21) extending into the mounting column (20) is movably connected to the limiting plate 1 (22). One end of the guide column (23) is fixedly connected to the bottom of the limiting plate 1 (22), and the other end of the guide column (23) is also fixedly connected to the bottom of the limiting plate 1 (22). One end is connected to the movable through limiting plate two (25) and extends into the U-shaped column (26). The connecting spring one (24) is sleeved on the outer wall of the guide column (23), and the two ends of the connecting spring one (24) are fixedly connected to the limiting plate one (22) and the limiting plate two (25) respectively. One end of the U-shaped column (26) extends movably into the mounting column (20), and the other end of the U-shaped column (26) is fixedly provided with a rubber ball (27). The diameter of the rubber ball (27) is slightly larger than the diameter of the filter hole of the cylindrical filter separator (2).

7. The sand-prevention fracturing wellhead device according to claim 1, characterized in that, The support member (53) has a gear groove (54), a guide groove (55), and a limiting groove (57). The drive gear three (59) is movably installed in the gear groove (54), and the drive rack one (58) is movably installed in the limiting groove (57). The drive rack one (58) is connected to the inner wall of the limiting groove (57) by a connecting spring four (56). The bottom of the drive rack one (58) is connected to the drive member (31) by a fixing rod one (37). The drive rack two (60) is movably installed in the guide groove (55). The drive rack two (69) is movably installed in the guide groove (55). 0) The end near the linkage block plate (5) is rotatably connected to the linkage block plate (5). Both the first drive rack (58) and the second drive rack (60) mesh with the third drive gear (59). The end of the fourth link (61) near the linkage block plate (5) is fixedly connected to the linkage block plate (5). A guide support wheel (62) is installed on the side of the fourth link (61) near the support member (53). A guide arc surface (64) is provided on the side of the support member (53) near the guide support wheel (62). The guide support wheel (62) abuts against the guide arc surface (64).

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