An oil self-cleaning filtration device and a composite oil pumping joint

Abstract

The present invention discloses an oil self-cleaning filtration device and a composite oil pumping joint, which relate to the field of oil filtration. The device includes a housing, with a crude oil inlet provided at one end of the housing and an oil outlet provided at the other end. The crude oil inlet is communicated with the oil outlet of an oil pump through a pipeline. A beam pumping unit drives the oil pump through the composite oil pumping joint, and the oil outlet is communicated with a storage tank; an oil filtering mechanism is installed in the housing and is used for filtering the crude oil; a slag discharge port is provided through the housing corresponding to the oil filtering mechanism, and a slag collection bin is hermetically clamped and arranged at the slag discharge port; a scraper is further arranged in the slag discharge port. When the cleaning condition is reached by this filtration device, the oil filtering mechanism can automatically complete the cleaning of itself, improving the overall filtration efficiency; at the same time, the composite oil pumping joint can effectively avoid the occurrence of phenomena such as its detachment and twisting off, and simultaneously improve its corrosion resistance.

Description

Technical Field

[0001] The present invention relates to the field of oil filtration, and particularly to an oil self-cleaning filtration device and a composite pumping joint. Background Art

[0002] Oil, one of the core pursuit objects in geological exploration, is a viscous and dark brown liquid, known as the "lifeblood of industry". It is mainly stored in the shallow area of the earth's crust, with a complex composition, consisting of many alkane, cycloalkane and aromatic hydrocarbon substances intertwined. Oil is not only the main source of fuels such as fuel oil and gasoline, but also plays a key role as a raw material for a variety of products in the chemical industry, covering fields such as solvents, fertilizers, pesticides and plastics. However, the crude oil extracted from the ground is often mixed with impurities and foreign matters, and it must go through the process of filtering out impurities to obtain pure oil products. In the existing oil filtration and extraction equipment, the following problems exist:

[0003] 1. The real-time oil filtration equipment cannot achieve automatic cleaning. Usually, after a stage of filtration is completed, the filter screen needs to be manually removed for active cleaning. The manual cleaning method is not only cumbersome but also reduces the overall filtration efficiency;

[0004] 2. The filtration state and cleaning time of the filter screen cannot be accurately controlled. Frequent cleaning is likely to cause excessive wear on the filter screen, and untimely cleaning is likely to result in poor oil filtration efficiency;

[0005] 3. During the working state, the pumping rod joint is prone to falling off, the pumping rod is prone to breaking, and there is also the problem of easy corrosion.

[0006] In view of the above problems, the present invention provides an oil self-cleaning filtration device and a composite pumping joint to solve the above problems. Summary of the Invention

[0007] To achieve the above object, the present invention provides the following technical solution: An oil self-cleaning filtration device, comprising: a housing, one end of the housing is provided with a crude oil inlet, the other end is provided with an oil outlet, the crude oil inlet is communicated with the oil outlet of the oil pump through a pipeline, the beam pumping unit drives the oil pump through a composite pumping joint, and the oil outlet is communicated with the storage tank;

[0008] An oil filtering mechanism, the oil filtering mechanism is installed in the housing for filtering the crude oil; a slag discharge port is opened through the housing corresponding to the oil filtering mechanism, and a filter residue collection bin is clamped and sealed on the slag discharge port; a scraper is also arranged in the slag discharge port.

[0009] Further, preferably, the oil filtering mechanism includes: an oil guiding valve port, the oil guiding valve port is fixed at one end of the housing close to the crude oil inlet, an adjusting ring is slidably and sealedly arranged with the housing through the oil guiding valve port, and an adjusting spring is arranged between the adjusting ring and the oil guiding valve port;

[0010] Two control components are symmetrically arranged inside the housing, with one end connected to the adjusting ring and the other end connected to one end of the oil filtering component. The oil filtering component is installed inside the housing.

[0011] A fixing frame is fixed inside the housing and connected to the other end of the oil filtering component.

[0012] Furthermore, preferably, the oil filtering component includes a ring frame which is slidably arranged inside the housing. A bearing is fixedly arranged at the axis of the ring frame, and a nut is coaxially arranged through the bearing. A scraping plate is fixedly arranged on the nut.

[0013] A lead screw is fixedly arranged on the fixing frame and is also threadedly connected to the nut.

[0014] Two locking hooks are symmetrically fixed on the ring frame and are clamped with the control component.

[0015] Furthermore, preferably, the oil filtering component further includes: a filter residue temporary storage box, a filter screen, a sealing sleeve ring, and a compression spring.

[0016] The filter residue temporary storage box is fixedly arranged on the ring frame; the filter screen is fixed on the ring frame; the sealing sleeve ring is fixedly arranged on the housing for cooperating with the ring frame to achieve sealing.

[0017] The compression spring is sleeved on the lead screw, with one end connected to the fixing frame and the other end connected to the ring frame.

[0018] Furthermore, preferably, the control component includes a fixing ring which is fixedly arranged on the housing. A rotating seat is fixedly arranged on the fixing ring corresponding to the locking hook.

[0019] An adjusting rod is rotatably arranged on the rotating seat, with one end clamped with the locking hook and the other end rotatably arranged at one end of the telescopic adjuster. The other end of the telescopic adjuster is rotatably arranged on the adjusting ring.

[0020] Furthermore, preferably, the filter residue temporary storage box includes a filter residue box which is fixedly arranged on the ring frame. A bottom plate is rotatably arranged at the bottom of the filter residue box away from the ring frame.

[0021] A composite oil pumping joint, characterized in that it includes a pumping rod, a sleeve joint, an inner sleeve, a connecting head, and an oil self-cleaning and filtering device.

[0022] One end of the connecting head is connected to the oil pump of the oil self-cleaning and filtering device, and the other end is detachably connected to the sleeve joint through an internal thread. The surface of the connecting head is treated by a multi-element alloy co-permeation technology.

[0023] The inner sleeve is fixed within the socket joint. The outer wall of the inner sleeve is of a conical structure, and three arc-shaped platforms are provided inside. The arc-shaped platforms are used to hold the sucker rod tightly. A torsion unloading device, a coupling, and a centralizer that have been treated with a multi-element alloy co-permeation technology are arranged on the sucker rod. The coupling is used to connect and separate sucker rods of different quantities and specifications;

[0024] The torsion unloading device is used to absorb, disperse, and reduce the torsion and stress generated by the reciprocating motion of the driving equipment; the centralizer is used to straighten the sucker rod and prevent eccentric wear.

[0025] Further, preferably, the sucker rod is a fiber-reinforced composite material; after the inner sleeve is integrally processed, it is divided into two halves at the axial center position and has a certain gap.

[0026] Compared with the prior art, the present invention provides an oil self-cleaning filtration device and a composite sucker joint, having the following beneficial effects:

[0027] 1. During the process of crude oil filtration by the oil filtration mechanism, the impurities adhering to the oil filtration mechanism gradually increase, resulting in a gradual decrease in the filtration efficiency. At this time, when the filtration efficiency gradually decreases and is less than the extraction efficiency of the oil pump, the filtration mechanism relatively gradually increases the oil storage space, thereby maintaining the extraction efficiency of the oil pump. When the maximum oil storage space of the filtration mechanism is reached, the filtration mechanism automatically cleans the impurities adhering to it. When the cleaned impurities pass through the slag discharge port, the impurities are scraped by the scraper and fall into the filter residue collection bin for storage, thereby realizing the self-cleaning of the filter screen during the process of filtering crude oil and improving the overall efficiency of crude oil filtration.

[0028] 2. When the oil filtration mechanism reaches the cleaning condition, it automatically cleans the filter screen, avoiding the wear of the filter screen caused by excessive cleaning and the reduction of the filtration efficiency caused by untimely cleaning.

[0029] 3. The outer wall of the inner sleeve has the same taper as the inner wall of the socket joint and has a high surface finish. At the same time, the arc-shaped platforms arranged on the inner sleeve hold the sucker rod tightly. That is, when the sucker rod bears an axial tensile force, the inner sleeve will synchronously move downward to the socket joint, thereby converting the axial tensile force into a radial locking force. This locking force will further improve the mechanical locking effect of the arc-shaped platforms on the sucker rod, and the stronger the axial tensile force, the better the mechanical locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an overall schematic diagram of an oil self-cleaning filtration device;

[0031] Figure 2 is an enlarged schematic diagram of the structure at A of an oil self-cleaning filtration device;

[0032] Figure 3Schematic diagram of the connection of the oil filtering component of an oil self-cleaning filter device;

[0033] Figure 4 Schematic diagram of the enlarged structure at position B of an oil self-cleaning filter device;

[0034] Figure 5 Schematic diagram of the enlarged structure at position C of an oil self-cleaning filter device;

[0035] Figure 6 Schematic diagram of the enlarged structure at position D of an oil self-cleaning filter device;

[0036] Figure 7 Schematic diagram of the slag discharge port of an oil self-cleaning filter device;

[0037] Figure 8 Schematic diagram of the internal structure connection of a composite pumping joint;

[0038] Figure 9 Schematic diagram of the inner sleeve structure of a composite pumping joint;

[0039] Figure 10 Top view schematic diagram of the inner sleeve of a composite pumping joint;

[0040] Figure 11 Schematic diagram of the structure of the connecting head of a composite pumping joint;

[0041] Figure 12 Top view schematic diagram of the connecting head of a composite pumping joint;

[0042] In the figure: 1. Shell; 2. Crude oil inlet; 4. Oil outlet; 5. Filter residue collection bin; 61. Pumping rod; 62. Sleeve joint; 63. Inner sleeve; 64. Connecting head; 7. Oil filtering mechanism; 71. Oil guiding valve port; 72. Adjusting ring; 73. Adjusting spring; 74. Control component; 741. Fixed ring; 742. Rotating seat; 743. Adjusting rod; 745. Telescopic adjuster; 75. Oil filtering component; 751. Ring frame; 752. Lead screw; 753. Lock hook; 754. Nut; 755. Filter residue temporary storage box; 7551. Filter residue box; 7552. Bottom plate; 756. Bearing; 757. Filter screen; 758. Scraping plate; 759. Sealing sleeve ring; 7510. Compression spring; 76. Fixed frame; 8. Slag discharge port; 9. Scraping plate. Specific implementation mode

[0043] Refer to Figures 1 to 12 , the present invention provides a technical solution: an oil self-cleaning filter device, including: a shell 1, one end of the shell 1 is provided with a crude oil inlet 2, the other end is provided with an oil outlet 4, the crude oil inlet 2 is communicated with the oil outlet of the oil pump through a pipeline, the beam pumping unit drives the oil pump through a composite pumping joint, and the oil outlet 4 is communicated with the storage tank;

[0044] The oil filtering mechanism 7 is installed inside the housing 1 and is used to filter the crude oil. A slag discharge port 8 is provided through the housing 1 corresponding to the oil filtering mechanism 7, and a slag collection bin 5 is clamped and sealed on the slag discharge port 8. A scraper 9 is also provided inside the slag discharge port 8.

[0045] Start the beam pumping unit. The beam pumping unit drives the oil pump through a compound pumping joint to extract the crude oil in the rock formation. The crude oil extracted by the oil pump flows into the housing 1 through the pipeline via the crude oil inlet 2. At this time, the crude oil filters impurities under the action of the oil filtering mechanism 7. After the filtration is completed, the crude oil flows through the oil outlet 4 to the storage tank for storage.

[0046] During the process of the oil filtering mechanism 7 filtering the crude oil, the impurities adhering to the oil filtering mechanism 7 will gradually increase, resulting in a gradual decrease in the filtering efficiency. At this time, when the filtering efficiency gradually decreases and is less than the extraction efficiency of the oil pump, the oil filtering mechanism 7 will relatively gradually increase the oil storage space; when the maximum oil storage space of the oil filtering mechanism 7 is reached, the oil filtering mechanism 7 automatically cleans the impurities adhering to it. When the cleaned impurities pass through the slag discharge port 8, the scraper 9 is used to scrape them off and make them fall into the slag collection bin 5 for storage.

[0047] After the oil filtering mechanism 7 completes self-cleaning, it resumes the initial filtering state. Repeating the above process can continuously filter the impurities in the crude oil extracted by the oil pump, ensuring real-time filtration of the extracted crude oil, reducing the impurity content in the crude oil while improving the extraction and subsequent treatment efficiency of the crude oil.

[0048] As a preferred embodiment, the oil filtering mechanism 7 includes: an oil guiding valve port 71, which is fixed at one end of the housing 1 close to the crude oil inlet 2. An adjusting ring 72 is slidably sealed with the housing 1 through the oil guiding valve port 71, and an adjusting spring 73 is provided between the adjusting ring 72 and the oil guiding valve port 71;

[0049] Two control components 74 are symmetrically arranged inside the housing 1, one end of which is connected to the adjusting ring 72 and the other end is connected to one end of the oil filtering component 75. The oil filtering component 75 is installed inside the housing 1;

[0050] A fixing frame 76 is fixed inside the housing 1 and is connected to the other end of the oil filtering component 75.

[0051] It should be noted that the crude oil entering the housing 1 flows to the oil filtering component 75 through the oil guiding valve port 71, and the impurities in the crude oil are filtered under the action of the oil filtering component 75.

[0052] When the impurities adhering to the oil filtering assembly 75 gradually increase, resulting in the filtration efficiency being lower than the production efficiency of the oil extraction pump, the continuous inflow of crude oil causes the adjusting ring 72 to slide towards the side close to the crude oil inlet 2, thereby increasing the oil storage space. When the adjusting ring 72 slides, while compressing the adjusting spring 73, the state of the adjusting control assembly 74 is adjusted. When the oil storage space gradually approaches the limit, the continuous inflow of crude oil causes the adjusting ring 72 to continue sliding, thereby causing the control assembly 74 to change the connection state with the oil filtering assembly 75. When the oil storage space reaches the limit (the adjusting ring 72 slides to the limit), the connection state between the control assembly 74 and the oil filtering assembly 75 is released. Under the action of the adjusting spring 73, the adjusting ring 72 pushes the crude oil to act on the oil filtering assembly 75, so that the oil filtering assembly 75 self-cleans the impurities adhering to it. After the impurities are self-cleaned, the oil filtering assembly 75 returns to the initial state and reconnects with the control assembly 74.

[0053] As a preferred embodiment, the oil filtering assembly 75 includes a ring frame 751. The ring frame 751 is slidably arranged in the housing 1. A bearing 756 is fixedly arranged at the axis center of the ring frame 751. A nut 754 is coaxially arranged through the bearing 756. A scraping plate 758 is fixedly arranged on the nut 754. A limiting platform is further arranged on the ring frame 751. The limiting platform abuts against the housing 1 to limit the rotation of the ring frame 751.

[0054] A lead screw 752 is fixedly arranged on the fixing frame 76. The lead screw 752 is also threadedly connected with the nut 754.

[0055] Two locking hooks 753 are symmetrically fixed on the ring frame 751 and are clamped with the control assembly 74.

[0056] As a preferred embodiment, the oil filtering assembly 75 further includes: a filter residue temporary storage box 755, a filter screen 757, a sealing sleeve ring 759, and a compression spring 7510.

[0057] The filter residue temporary storage box 755 is fixedly arranged on the ring frame 751. The filter screen 757 is fixed on the ring frame 751. The sealing sleeve ring 759 is fixedly arranged on the housing 1 to cooperate with the ring frame 751 to achieve sealing.

[0058] The compression spring 7510 is sleeved on the lead screw 752, with one end connected to the fixing frame 76 and the other end connected to the ring frame 751.

[0059] It should be noted that the filter screen 757 filters the impurities in the crude oil. The impurities adhere to the filter screen 757 under the action of the crude oil. As a result, during the filtration of the crude oil by the filter screen 757, the impurities gradually block the mesh holes, causing the filtration efficiency of the filter screen 757 for the crude oil to gradually decrease.

[0060] When the efficiency of the filter screen 757 in filtering crude oil is lower than the efficiency of the oil extraction pump in pumping crude oil, the unfiltered part of the crude oil will act on the adjusting ring 72, prompting the adjusting ring 72 to slide to increase the oil storage space. At the same time, the movement of the adjusting ring 72 will also cause the adjusting spring 73 to be gradually compressed and change the state of the control component 74. When the adjusting ring 72 gradually slides to the limit position (the oil storage space gradually reaches the limit), the continuous movement of the adjusting ring 72 will cause the control component 74 to gradually deflect; when the adjusting ring 72 reaches the limit sliding position, the deflection of the control component 74 will cause it to disconnect from the locking hook 753, so that under the action of the adjusting spring 73, the ring frame 751 and the filter screen 757 slide in the housing 1 through the crude oil.

[0061] When the ring frame 751 slides, the nut 754 starts to rotate under the action of the lead screw 752. The rotation of the nut 754 causes the scraping plate 758 to rotate and scrape the impurities adhered to the surface of the filter screen 757. At the same time, the sliding distance of the ring frame 751 just makes the scraping plate 758 rotate a whole number of turns on the filter screen 757, that is, after the scraping is completed, the scraping plate 758 will stay at the initial position.

[0062] After the scraping plate 758 finishes cleaning the impurities adhered to the surface of the filter screen 757, it will be concentrated and piled up above the filter residue temporary storage box 755. Under the action of gravity, more impurities will gradually flow into the filter residue temporary storage box 755 for collection.

[0063] When cleaning the impurities on the filter screen 757, the sliding of the ring frame 751 will squeeze the compression spring 7510. After the scraping plate 758 finishes removing the impurities on the filter screen 757, the elastic force generated by the compression spring 7510 can make the ring frame 751 return to the initial state, and at the same time make the locking hook 753 establish a connection relationship with the control component 74.

[0064] As a preferred embodiment, the control component 74 includes a fixed ring 741, which is fixedly arranged on the housing 1. A rotating seat 742 is fixedly arranged on the fixed ring 741 corresponding to the locking hook 753;

[0065] An adjusting rod 743 is rotatably arranged on the rotating seat 742. One end is clamped with the locking hook 753, and the other end is rotatably arranged at one end of a telescopic adjuster 745. The other end of the telescopic adjuster 745 is rotatably arranged on the adjusting ring 72.

[0066] It should be noted that during the movement of the adjusting ring 72, the length of the telescopic adjuster 745 will change adaptively. When the telescopic adjuster 745 reaches the limit state and its length cannot be changed, the continuous movement of the adjusting ring 72 will cause the telescopic adjuster 745 to pull the adjusting rod 743 and make it rotate. When the adjusting ring 72 moves to the limit position, the rotation angle of the adjusting rod 743 will cause it to disconnect from the locking hook 753, that is, the position limitation of the ring frame 751 is released. Thus, under the action of the adjusting spring 73, the ring frame 751 uses the adjusting ring 72 and the crude oil to push the ring frame 751 to move, so as to complete the self-cleaning effect of the filter screen 757.

[0067] After the filter screen 757 completes self-cleaning, during the process of the compression spring 7510 restoring to the initial state, the locking hook 753 establishes a connection relationship with the adjusting rod 743, thereby restoring the position limitation of the ring frame 751.

[0068] It should be noted that a torsion spring is provided at the rotating connection shaft of the transposon 742 and the adjusting rod 743. The torsion spring is used to maintain the deflection angle between the adjusting rod 743 and the transposon 742, so that the locking hook 753 can disconnect from the adjusting rod 743 and then re-establish a connection relationship.

[0069] As a preferred embodiment, the filter residue temporary storage box 755 includes a filter residue box 7551. The filter residue box 7551 is fixedly arranged on the ring frame 751, and a bottom plate 7552 is rotatably arranged at the bottom of the end of the filter residue box 7551 away from the ring frame 751.

[0070] It should be noted that during the self-cleaning process of the filter screen 757, the sliding of the ring frame 751 will drive the filter residue box 7551 to move. After the filter residue box 7551 disengages from the sealing sleeve ring 759, the filter residue stored therein causes the bottom plate 7552 to rotate under the action of gravity. Thus, when the bottom plate 7552 contacts the scraper 9, the impurities adhered to the bottom plate 7552 are scraped off, and finally the impurities fall into the filter residue collection bin 5 for storage.

[0071] When the ring frame 751 restores to the initial state, the bottom plate 7552 rotates under the action of the sealing sleeve ring 759 and docks with the filter residue box 7551.

[0072] A composite oil pumping joint, characterized in that: it includes a sucker rod 61, a sleeve joint 62, an inner sleeve 63, a connecting head 64 and an oil self-cleaning and filtering device;

[0073] One end of the connecting head 64 is connected to the oil pump of the oil self-cleaning and filtering device, and the other end is detachably connected to the sleeve joint 62 through an internal thread, and the surface of the connecting head 64 is treated by a multi-element alloy co-permeation technology;

[0074] An inner sleeve 63 is fixed inside the socket joint 62. The outer wall of the inner sleeve 63 is of a conical structure, and three arc platforms are provided inside. The arc platforms are used to hold the sucker rod 61 tightly. A torque release device, a coupling, and a centralizer that have been treated by a multi-element alloy co-permeation technology are arranged on the sucker rod 61. The coupling is used to connect and separate sucker rods 61 of different numbers and specifications;

[0075] The torque release device is used to absorb, disperse, and reduce the torque and stress generated by the reciprocating motion of the driving equipment; the centralizer is used to straighten the sucker rod 61 and prevent eccentric wear.

[0076] As a preferred embodiment, the sucker rod 61 is a fiber-reinforced composite material and is formed by one-time pultrusion thermosetting. The maximum tensile force can reach 32 tons to 35 tons; after the inner sleeve 63 is integrally processed, it is divided into two halves at the axial center position and has a certain gap.

[0077] The outer wall of the inner sleeve 63 and the inner wall of the socket joint 62 have the same taper and require a high surface finish. In this way, under the action of the tensile force, the inner sleeve 63 moves towards the small end of the socket joint 62, converting the axial tensile force into a radial force to clamp the sucker rod 61, and the clamping force increases as the axial force increases. Under the action of the arc platform of the inner sleeve 63, the sucker rod 61 is held tightly.

[0078] During specific implementation, start the beam pumping unit to drive the oil pump through the composite pumping joint. The oil pump pumps the exploited crude oil into the housing 1 through the crude oil inlet 2. The oil filtering component 75 filters the impurities in the pumped crude oil. During the continuous impurity filtering process of the oil filtering component 75, the filtering efficiency gradually decreases due to the adhesion of impurities; when the filtering limit is reached, the oil filtering component 75 performs self-cleaning under the action of the adjusting spring 73, and discharges the impurities generated after cleaning into the filter residue collection bin 5. After the self-cleaning is completed, the oil filtering component 75 returns to its initial state and continues to filter the exploited crude oil.

[0079] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An oil self-cleaning filtration device, characterized in that: Comprising: A housing (1), with a crude oil inlet (2) provided at one end of the housing (1) and an oil outlet (4) provided at the other end. The crude oil inlet (2) is communicated with the oil outlet of a submersible pump through a pipeline. A beam pumping unit drives the submersible pump through a compound pumping joint, and the oil outlet (4) is communicated with a storage tank; An oil filtering mechanism (7), which is installed in the housing (1) and used for filtering crude oil. A slag discharge port (8) is provided through the housing (1) corresponding to the oil filtering mechanism (7), and a slag collection bin (5) is clamped and sealed on the slag discharge port (8); A scraper (9) is further provided in the slag discharge port (8); The oil filtering mechanism (7) includes: an oil guiding valve port (71), which is fixed at one end of the housing (1) close to the crude oil inlet (2). An adjusting ring (72) is slidably and sealingly arranged with the housing (1) through the oil guiding valve port (71), and an adjusting spring (73) is arranged between the adjusting ring (72) and the oil guiding valve port (71); Two control components (74), which are symmetrically arranged in the housing (1), with one end connected to the adjusting ring (72) and the other end connected to one end of an oil filtering component (75). The oil filtering component (75) is installed in the housing (1); A fixing frame (76), which is fixed in the housing (1) and connected to the other end of the oil filtering component (75); The oil filtering component (75) includes a ring frame (751), which is slidably arranged in the housing (1). A bearing (756) is fixedly arranged at the axis of the ring frame (751), and a nut (754) is coaxially arranged through the bearing (756). A scraping plate (758) is fixedly arranged on the nut (754); A lead screw (752), which is fixedly arranged on the fixing frame (76), and the lead screw (752) is also threadedly connected to the nut (754); Two locking hooks (753), which are symmetrically fixed on the ring frame (751) and are clamped with the control component (74); The oil filtering component (75) further includes: a slag temporary storage box (755), a filter screen (757), a sealing sleeve ring (759), and a compression spring (7510); The slag temporary storage box (755) is fixedly arranged on the ring frame (751); The filter screen (757) is fixed on the ring frame (751); The sealing sleeve ring (759) is fixedly arranged on the housing (1) for cooperating with the ring frame (751) to achieve sealing; The compression spring (7510) is sleeved on the lead screw (752), with one end connected to the fixing frame (76) and the other end connected to the ring frame (751); The control component (74) includes a fixing ring (741), which is fixedly arranged on the housing (1). A rotating seat (742) is fixedly arranged on the fixing ring (741) corresponding to the locking hook (753); The adjusting rod (743) is rotatably arranged on the swivel base (742), with one end engaged with the locking hook (753) and the other end rotatably arranged at one end of the telescopic adjuster (745), and the other end of the telescopic adjuster (745) is rotatably arranged on the adjusting ring (72); The filter residue temporary storage box (755) includes a filter residue box (7551) fixedly arranged on the ring frame (751), and a bottom plate (7552) is rotatably arranged at the bottom of the filter residue box (7551) away from the ring frame (751).

2. A composite pumping joint, characterized in that: It includes a sucker rod (61), a socket joint (62), an inner sleeve (63), a connector (64) and the oil self-cleaning filtration device as described in claim 1; One end of the connector (64) is connected to the oil pump of the oil self-cleaning filtration device, and the other end is detachably connected to the socket joint (62) through internal threads, and the surface of the connector (64) is treated by a multi-alloy co-permeation technology; The inner sleeve (63) is fixed in the socket joint (62), the outer wall of the inner sleeve (63) is in a conical structure, and three arc platforms are provided inside, and the arc platforms are used to hold the sucker rod (61) tightly. A torsion unloading device, a coupling and a centralizer treated by the multi-alloy co-permeation technology are arranged on the sucker rod (61), and the coupling is used to connect and separate the sucker rods (61) of different numbers and specifications; The torsion unloading device is used to absorb, disperse and reduce the torsion and stress generated by the reciprocating motion of the driving equipment; the centralizer is used to centralize and prevent eccentric wear of the sucker rod (61).

3. The composite pumping joint according to claim 2, characterized in that: The sucker rod (61) is a fiber-reinforced composite material; after the inner sleeve (63) is integrally processed, it is divided into two halves at the axial center position and has a certain gap.

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