Separating, filtering and draining device for produced liquid of oil and gas well

Abstract

The invention relates to the technical field of oil and gas well equipment, in particular to an oil and gas well produced liquid separating, filtering and draining device which comprises a filter box, a liquid pump is fixedly installed at the upper end of the outer portion of the filter box, a liquid outlet pipe is fixedly installed on one side of the outer portion of the filter box, and a filter plate is slidably installed in the filter box. Clamping assemblies are installed on the two sides of the upper end of the filter box, a scraping assembly is installed in the filter box, connecting pipes are installed at the inlet and outlet ends of the infusion pump, filter type liquid inlet heads are installed at the other ends of the connecting pipes, and connecting assemblies are arranged between the connecting pipes and between the connecting pipes and the filter type liquid inlet heads. Accumulated liquid can be pumped into the filtering box through the connecting pipe and the infusion pump after being preliminarily filtered through the filtering type liquid inlet head, then filtering is conducted through the filtering plate, impurities in the accumulated liquid are reduced, the service life of the infusion pump is prolonged, meanwhile, the connecting assembly can be in rigid connection and flexible connection, a user can adjust connection according to the actual using condition, and the using effect of the user is improved. And a user can lay conveniently.

Description

Technical Field

[0001] The invention relates to a liquid discharge device, in particular to an oil and gas well produced liquid separation, filtering and liquid discharge device, belonging to the technical field of oil and gas well equipment. Background Art

[0002] Oil and gas wells, also known as "production wells", refer to holes drilled for the purpose of extracting oil or natural gas from underground. According to different uses, oil and gas wells can be divided into oil wells and gas wells. When using oil and gas wells to extract oil and gas, a drainage device is required to discharge the accumulated liquid in the oil and gas wells. By draining the liquid, the bottom hole pressure can be reduced, allowing oil and gas to flow into the wellbore, thereby improving the production efficiency of the oil and gas wells. At the same time, timely discharge of liquids such as residual fracturing fluid can reduce further damage to the oil and gas layer by these liquids, thereby protecting the oil and gas layer. In addition, drainage helps prevent underground problems caused by excessive accumulation of liquid or waste liquid, such as gas invasion, overflow, well kick, blowout, etc. Draining the liquid can discharge harmful substances such as underground accumulated liquid and waste liquid from the wellhead, keep the underground environment clean, and help improve the production efficiency of the oil field. At the same time, as the gas reservoir pressure and natural gas flow As the flow speed gradually decreases, the produced water or condensate in the gas reservoir cannot be carried out of the wellbore with the natural gas, and thus is retained in the wellbore to form "gas well liquid accumulation". The production of gas wells and even gas fields can be increased through drainage and gas production measures. In some cases, such as horizontal wells or deep wells, due to the large depth of the wellbore, it is necessary to use continuous tubing gas lift and other methods to drain the liquid to meet specific process requirements. Through effective drainage measures, the output and production efficiency of oil and gas wells can be increased, thereby improving the economic benefits of the oil field. During the drainage process, the drainage equipment can also be inspected, maintained and cleaned, and the drainage liquid can be tested and treated to ensure the safety and environmental protection of the drainage. Therefore, drainage is an important operation in the oil and gas production process. Therefore, drainage equipment is one of the indispensable equipment in oil and gas production.

[0003] As shown in the announcement number: CN114059973A, an oil and gas well drainage device includes: a flexible cable; a working bucket, which is arranged on the first end of the flexible cable and is used to extend into the oil and gas well, and forms a sealed contact with the oil casing of the oil and gas well when being lifted; a sealing connection component, which is used to pass the flexible cable and form a sealed contact with the flexible cable, and the bottom end of the sealing connection component is used to form a sealed connection with the oil and gas production tree at the oil and gas wellhead. After the working bucket is extended into the oil and gas well by the flexible cable to reach the drainage depth, the working bucket is then lifted by the flexible cable to form a sealed contact between the working bucket and the oil casing of the oil and gas well, and a negative pressure environment is formed below the working bucket to lift and discharge the accumulated liquid in the oil and gas well; and when the oil and gas well drainage device is working, since the sealing connection component forms a sealed connection with the oil and gas production tree of the oil and gas well, it can not only keep the oil and gas well in a normal production state, but also prevent the oil and gas or accumulated liquid in the oil and gas well from leaking from the wellhead of the oil and gas well, causing resource waste and environmental pollution.

[0004] However, the above technical solution cannot filter the accumulated liquid when in use, and impurities may easily enter the liquid pump during discharge, thereby affecting the service life of the liquid pump. At the same time, direct discharge of the accumulated liquid without filtering may also cause harm to the environment. In addition, the liquid discharge pipe that penetrates into the oil and gas well in the above technical solution cannot adjust the degree of curvature according to the curvature of the oil and gas well, which is inconvenient for users to use. In view of this, the present invention is specially proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an oil and gas well produced liquid separation, filtration and drainage device in order to solve the above-mentioned problems. The device has the advantages of being able to filter the accumulated liquid and being able to adjust the bending degree of the connecting pipe. The accumulated liquid can be initially filtered through the filtering liquid inlet head and then pumped into the filter box through the connecting pipe and the liquid pump, and then filtered through the filter plate, so that impurities in the accumulated liquid are reduced and the service life of the liquid pump is increased. At the same time, the connecting components can be divided into rigid connections and flexible connections, so that the user can adjust the connection according to actual usage conditions, so that the connecting pipe and the filtering liquid inlet head can adjust the angle according to actual usage conditions, thereby facilitating the user's use.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme: an oil and gas well produced liquid separation, filtration and drainage device, comprising a filter box, a liquid pump is fixedly installed on the outer upper end of the filter box, the output end of the liquid pump is communicated with the interior of the filter box, and a liquid outlet pipe is fixedly installed on the outer side of the filter box, a filter plate is slidably installed inside the filter box, and clamping components for fixing the filter plate are installed on both sides of the upper end of the filter box, a scraper component is installed inside the filter box, and the scraper component is located on one side of the filter plate, a connecting pipe is installed at the inlet and outlet ends of the liquid pump, the number of the connecting pipes is several, and the connecting pipes are rigid pipes, and a filtering liquid inlet head is installed on the other end of the connecting pipe. A connecting assembly is provided between the connecting pipes and between the connecting pipe and the filtering liquid inlet head. When in use, the filter box is first placed on one side of the external oil and gas well, and then the connection method of the connecting pipe and the filtering liquid inlet head is adjusted according to actual usage, so that the filtering liquid inlet head can contact the accumulated liquid, and then the filter plate is clamped in the filter box and then fixed by the clamping assembly. The liquid pump passes the filtered liquid inlet head and the connecting pipe to coarsely filter the accumulated liquid and then pumps it into the filter box. The filter plate is filtered and discharged through the liquid outlet pipe to complete the drainage operation. During filtering, the scraper assembly can scrape impurities on the filter plate, thereby reducing the occurrence of clogging of the filter plate.

[0007] Furthermore, in order to be able to place the filter box at the place of use and to facilitate the user to replace the filter plate, support feet are fixedly installed at the four corners of the outer lower end of the filter box, and anti-slip pads are fixedly installed at the lower ends of the support feet. A T-shaped snap-in groove is provided at the upper end of the filter box, and the T-shaped snap-in groove is connected to the interior of the filter box. The filter plate is slidably snap-in to the filter box through the T-shaped snap-in groove, and a handle is fixedly installed at the middle position of the upper end of the filter plate.

[0008] Furthermore, in order to be able to clip and fix the filter plate in the filter box, T-shaped circular grooves are provided on both sides of the outer upper end of the filter box, and the T-shaped circular groove is located on one side of the T-shaped clipping groove. The clipping assembly includes a T-shaped clipping block, which is rotatably clipped in the T-shaped circular groove, and a clipping plate is fixedly installed on the upper end of the T-shaped clipping block, and the clipping plate is located above one side of the upper end of the filter plate, and a clipping rotating rod is fixedly installed on the upper end of the clipping plate.

[0009] Furthermore, in order to drive the threaded rod to rotate in the filter box, the scraper assembly includes a reciprocating motor, the reciprocating motor is fixedly mounted on an outer side of the filter box, and a threaded rod is fixedly mounted on the output end of the reciprocating motor, the threaded rod is located inside the filter box, and the threaded rod is rotatably engaged with the side wall of the filter box.

[0010] Furthermore, in order to drive the movable rod and the rubber scraper to scrape off impurities on one side of the filter plate and reduce the occurrence of clogging of the filter plate, thereby improving the efficiency and effect of filtration, the scraper assembly also includes a guide rod, which is fixedly installed inside the filter box and located on both sides of the threaded rod. A movable rod is sleeved on the threaded rod and the guide rod, and the movable rod is located on one side of the filter plate. A rubber scraper is fixedly installed on one side of the movable rod, and the rubber scraper is in contact with one side of the filter plate.

[0011] 8. The filtration system of claim 7, wherein the filter element has a plurality of filtration units, each of which has a plurality of filtration units disposed on the filter element. The plurality of filtration units have respective filtration units connected to the filter element. The plurality of filtration units have respective filtration units connected to the filter element. The plurality of filtration units have respective filtration units connected to the filter element.

[0012] Furthermore, in order to enable a rigid connection between the connecting pipes and between the connecting pipe and the liquid inlet pipe, the connecting assembly includes a rigid connecting pipe, and a first rotating groove is provided on the outer sides of both ends of the rigid connecting pipe, and a first connecting ring is rotatably clamped in the first rotating groove, and the first connecting ring is threadedly connected to the end heads of the connecting pipe and the liquid inlet pipe.

[0013] Furthermore, in order to be able to adjust the angles between the connecting tubes and between the connecting tube and the liquid inlet tube, thereby facilitating the user to adjust the use according to actual usage, the connecting assembly also includes a second connecting ring, the second connecting ring is threadedly connected to the end heads of the connecting tube and the liquid inlet tube, a flexible connecting tube is fixedly installed between the second connecting rings, a second rotating groove is provided at the middle position of the outer side of the second connecting ring, a connecting plate is rotatably clamped in the second rotating groove, the connecting plate is octagonal in shape, and rotating plates are fixedly installed at both ends of the connecting plate, the rotating plates are located on both sides of the flexible connecting tube, and a rotating hole is provided at the other end of the rotating plate, a rotating pin is rotatably clamped in the rotating hole, the rotating plate is rotatably connected through the rotating pin, a limiting screw hole is provided in a circumferential array on the rotating plate, the circumferential array of the limiting screw holes is distributed around the rotating hole, and a limiting bolt is threadedly installed in the limiting screw hole.

[0014] The technical effects and advantages of the present invention are as follows: the accumulated liquid can be initially filtered through the filtering liquid inlet head and then pumped into the filter box through the connecting pipe and the liquid pump, and then filtered through the filter plate, so that impurities in the accumulated liquid are reduced and the service life of the liquid pump is increased. At the same time, the connecting components can be divided into rigid connections and flexible connections, so that the user can adjust the connection according to actual usage conditions, and the connecting pipe can adjust the angle according to actual usage conditions, which is convenient for users to lay. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a half-section view of the overall structure of the present invention;

[0017] Figure 3 A half-section view of the filter box of the present invention;

[0018] Figure 4 It is a schematic diagram of the structure of the filter plate and the scraper assembly in the present invention;

[0019] Figure 5 It is a structural schematic diagram of the clamping assembly in the present invention;

[0020] Figure 6 A half-section view of the connection of the rigid connecting pipe in the present invention;

[0021] Figure 7 A half-section view of the connection of the flexible connecting pipe in the present invention;

[0022] Figure 8 A half-section view of the filter-type liquid inlet head of the present invention;

[0023] In the figure: 1, filter box; 2, liquid pump; 3, liquid outlet pipe; 4, filter plate; 5, clamping assembly; 501, T-type clamping block; 502, clamping plate; 503, clamping rotating rod; 6, scraper assembly; 601, reciprocating motor; 602, threaded rod; 603, guide rod; 604, moving rod; 605, rubber scraper; 7, connecting pipe; 8, filter type liquid inlet head; 801, liquid inlet pipe; 802, filter cylinder; 803, liquid inlet hole; 804, support; 805, rotating cylinder; 806, adjustment Sectional groove; 807, adjusting rotating rod; 808, liquid inlet groove; 9, connecting assembly; 901, rigid connecting pipe; 902, first rotating groove; 903, first connecting ring; 904, second connecting ring; 905, flexible connecting pipe; 906, second rotating groove; 907, connecting plate; 908, rotating plate; 909, rotating hole; 9010, rotating pin; 9011, limiting screw hole; 9012, limiting bolt; 10, supporting foot; 11, T-shaped clamping groove; 12, handle; 13, T-shaped circular groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 8As shown, a device for separating, filtering and draining produced liquid from oil and gas wells comprises a filter box 1, a liquid pump 2 is fixedly installed on the upper end of the outside of the filter box 1, the output end of the liquid pump 2 is connected to the inside of the filter box 1, and a liquid outlet pipe 3 is fixedly installed on one side of the outside of the filter box 1, a filter plate 4 is slidably installed inside the filter box 1, and clamping components 5 for fixing the filter plate 4 are installed on both sides of the upper end of the filter box 1, a scraper component 6 is installed inside the filter box 1, and the scraper component 6 is located on one side of the filter plate 4, a connecting pipe 7 is installed at the inlet and outlet ends of the liquid pump 2, and the number of the connecting pipes 7 is several, and the connecting pipes 7 are rigid pipes, and a filtering liquid inlet head 8 is installed at the other end of the connecting pipe 7, and the connecting pipe 7 is connected to the filter plate 4. A connecting component 9 is provided between the connecting pipe 7 and the filtering liquid inlet head 8. When in use, the filter box 1 is first placed on one side of the external oil and gas well, and then the connection method of the connecting pipe 7 and the filtering liquid inlet head 8 is adjusted according to actual usage, so that the filtering liquid inlet head 8 can contact the accumulated liquid, and then the filter plate 4 is clamped in the filter box 1, and then fixed by the clamping component 5. The liquid pump 2 passes the filtering liquid inlet head 8 and the connecting pipe 7 to roughly filter the accumulated liquid and then pump it into the filter box 1. The filter plate 4 is filtered and discharged through the liquid outlet pipe 3 to complete the drainage operation. During filtering, the scraper component 6 can scrape off the impurities on the filter plate 4, thereby reducing the occurrence of clogging of the filter plate 4.

[0026] Support feet 10 are fixedly installed at the four corners of the lower end of the outside of the filter box 1, and anti-slip pads are fixedly installed at the lower ends of the support feet 10. A T-shaped clamping groove 11 is opened at the upper end of the filter box 1, and the T-shaped clamping groove 11 is connected to the inside of the filter box 1. The filter plate 4 is slidably clamped in the filter box 1 through the T-shaped clamping groove 11, and a handle 12 is fixedly installed at the middle position of the upper end of the filter plate 4. T-shaped circular grooves 13 are opened on both sides of the upper end of the outside of the filter box 1. The T-shaped circular groove 13 is located on one side of the T-shaped clamping groove 11. The clamping assembly 5 includes a T-shaped clamping block 501, and the T-shaped clamping block 501 is rotatably clamped in the T-shaped In the circular groove 13, a clamping plate 502 is fixedly installed on the upper end of the T-shaped clamping block 501, and the clamping plate 502 is located above one side of the upper end of the filter plate 4, and a clamping rotating rod 503 is fixedly installed on the upper end of the clamping plate 502. When in use, the filter box 1 is first placed on one side of the external oil and gas well through the supporting feet 10, and then the filter plate 4 is clamped in the filter box 1 through the handle 12. At this time, the upper end of the filter plate 4 is clamped in the T-shaped clamping groove 11, and then the clamping plate 502 is rotated by the clamping rotating rod 503 to move the clamping plate 502 to the top of the filter plate 4, so that the filter plate 4 can be clamped and fixed.

[0027] The filter-type liquid inlet head 8 includes a liquid inlet pipe 801, and the ends of the connecting pipe 7 and the liquid inlet pipe 801 are both provided with threaded grooves. A filter cartridge 802 is fixedly installed at one end of the liquid inlet pipe 801, and liquid inlet holes 803 are evenly provided at the lower end of the filter cartridge 802. The interior of the filter cartridge 802 is connected to the outside through the liquid inlet holes 803, and a support column 804 is fixedly installed in a circular array at the lower end of the outside of the filter cartridge 802. A rotating cartridge 805 is rotatably connected to the interior of the filter cartridge 802, and the rotating cartridge 805 is in close contact with the interior of the filter cartridge 802. Adjustment grooves 806 are provided on both sides of the upper end of the filter cartridge 802, and the upper end of the rotating cartridge 805 is provided with a plurality of adjustment grooves. Adjustment rods 807 are fixedly installed on both sides, and the adjustment rods 807 are clamped in the adjustment grooves 806. The upper end of the adjustment rods 807 extends to the upper outside of the filter cylinder 802 through the adjustment grooves 806. Liquid inlet grooves 808 are evenly opened on the side walls of the filter cylinder 802 and the rotating cylinder 805. When in use, the adjustment rods 807 are rotated according to the depth of the accumulated liquid, thereby driving the rotating cylinder 805 to rotate, thereby controlling the opening and closing of the liquid inlet grooves 808. When the accumulated liquid is deep, opening the liquid inlet grooves 808 can improve the efficiency of liquid drainage. When the accumulated liquid is shallow, liquid only enters through the liquid inlet hole 803, thereby completely draining the accumulated liquid.

[0028] The connecting assembly 9 includes a rigid connecting pipe 901, and first rotating grooves 902 are provided on both ends of the rigid connecting pipe 901. A first connecting ring 903 is rotatably connected in the first rotating groove 902. The first connecting ring 903 is threadedly connected to the end of the connecting pipe 7 and the liquid inlet pipe 801. The connecting assembly 9 also includes a second connecting ring 904, which is threadedly connected to the end of the connecting pipe 7 and the liquid inlet pipe 801. A soft connecting pipe 905 is fixedly installed between the second connecting rings 904. A second rotation groove 906 is provided at the middle position of the outer side of the ring 904, and a connecting plate 907 is rotatably connected in the second rotation groove 906. The connecting plate 907 is octagonal in shape, and a rotation plate 908 is fixedly installed at both ends of the connecting plate 907. The rotating plate 908 is located on both sides of the flexible connecting tube 905, and a rotation hole 909 is provided at the other end of the rotating plate 908. A rotating pin 9010 is rotatably connected in the rotating hole 909. The rotating plate 908 is rotatably connected through the rotating pin 9010. The upper circumferential array of the limit screw holes 9011 is arranged, and the circumferential array of the limit screw holes 9011 is distributed around the rotating hole 909. The limit screw holes 9011 are threadedly installed with limit bolts 9012. When in use, when the angle does not need to be adjusted, the connection between the connecting pipes 7 and between the connecting pipe 7 and the liquid inlet pipe 801 is completed through the rigid connecting pipe 901, the first rotating groove 902 and the first connecting ring 903. When the angle needs to be adjusted, the second connecting ring 904, the soft connecting pipe 905, the second rotating groove 906 and the first connecting ring 907 are used to complete the connection between the connecting pipes 7 and the liquid inlet pipe 801. The groove 906, the connecting plate 907, the rotating plate 908, the rotating hole 909, the rotating pin 9010, the limiting screw hole 9011 and the limiting bolt 9012 complete the connection between the connecting pipes 7 and between the connecting pipe 7 and the liquid inlet pipe 801. When adjusting the angle, the limiting bolt 9012 is loosened, and then the rotating plate 908 is rotated so that the rotating plate 908 can drive the flexible connecting pipe 905 to adjust the angle, thereby adapting to oil and gas wells at different angles. After the adjustment is completed, it is fixed by the limiting bolt 9012.

[0029] The scraper assembly 6 includes a reciprocating motor 601, which is fixedly mounted on one side of the outside of the filter box 1, and a threaded rod 602 is fixedly mounted on the output end of the reciprocating motor 601, the threaded rod 602 is located inside the filter box 1, and the threaded rod 602 is rotatably engaged with the side wall of the filter box 1, the scraper assembly 6 also includes a guide rod 603, the guide rod 603 is fixedly mounted inside the filter box 1, and the guide rod 603 is located on both sides of the threaded rod 602, a moving rod 604 is sleeved on the threaded rod 602 and the guide rod 603, the moving rod 604 is located on one side of the filter plate 4, and a rubber scraper 605 is fixedly mounted on one side of the moving rod 604, the rubber scraper 605 is in contact with one side of the filter plate 4, during filtering, the reciprocating motor 601 can drive the threaded rod 602 to rotate, thereby driving the moving rod 604 to move, and the impurities on the filter plate 4 can be scraped off by the rubber scraper 605 to reduce the occurrence of blockage.

[0030] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An oil and gas well produced liquid separation, filtration and drainage device, comprising a filter box (1), characterized in that: A liquid pump (2) is fixedly mounted on the upper outer end of the filter box (1), the output end of the liquid pump (2) is connected to the interior of the filter box (1), and a liquid outlet pipe (3) is fixedly mounted on one side of the outer end of the filter box (1). A filter plate (4) is slidably mounted inside the filter box (1), and clamping assemblies (5) for fixing the filter plate (4) are mounted on both sides of the upper end of the filter box (1). A scraper assembly (6) is mounted inside the filter box (1), and the scraper assembly (6) is located on one side of the filter plate (4). Connecting pipes (7) are mounted at the inlet and outlet ends of the liquid pump (2), and the number of the connecting pipes (7) is several, and the connecting pipes (7) are rigid pipes. A filtering liquid inlet head (8) is mounted on the other end of the connecting pipe (7), and connecting assemblies (9) are arranged between the connecting pipes (7) and between the connecting pipes (7) and the filtering liquid inlet head (8).

2. The oil and gas well produced liquid separation, filtration and drainage device according to claim 1, characterized in that: Support feet (10) are fixedly mounted at the four corners of the lower end of the filter box (1), and anti-slip pads are fixedly mounted at the lower ends of the support feet (10). A T-shaped snap-fit ​​groove (11) is provided at the upper end of the filter box (1), and the T-shaped snap-fit ​​groove (11) is connected to the interior of the filter box (1). The filter plate (4) is slidably snap-fitted into the filter box (1) through the T-shaped snap-fit ​​groove (11), and a handle (12) is fixedly mounted at the middle position of the upper end of the filter plate (4).

3. The oil and gas well produced liquid separation, filtration and drainage device according to claim 1, characterized in that: T-shaped circular grooves (13) are provided on both sides of the outer upper end of the filter box (1), and the T-shaped circular groove (13) is located on one side of the T-shaped clamping groove (11). The clamping assembly (5) comprises a T-shaped clamping block (501), and the T-shaped clamping block (501) is rotatably clamped in the T-shaped circular groove (13), and a clamping plate (502) is fixedly installed on the upper end of the T-shaped clamping block (501), and the clamping plate (502) is located above one side of the upper end of the filter plate (4), and a clamping rotating rod (503) is fixedly installed on the upper end of the clamping plate (502).

4. The oil and gas well produced liquid separation, filtration and drainage device according to claim 1, characterized in that: The scraper assembly (6) comprises a reciprocating motor (601), the reciprocating motor (601) is fixedly mounted on one side of the outside of the filter box (1), and a threaded rod (602) is fixedly mounted on the output end of the reciprocating motor (601), the threaded rod (602) is located inside the filter box (1), and the threaded rod (602) is rotatably engaged with the side wall of the filter box (1).

5. The oil and gas well produced liquid separation, filtration and drainage device according to claim 4, characterized in that: The scraper assembly (6) also includes a guide rod (603), which is fixedly installed inside the filter box (1) and is located on both sides of the threaded rod (602). A moving rod (604) is sleeved on the threaded rod (602) and the guide rod (603), and the moving rod (604) is located on one side of the filter plate (4). A rubber scraper (605) is fixedly installed on one side of the moving rod (604), and the rubber scraper (605) is in contact with one side of the filter plate (4).

6. The oil and gas well produced liquid separation, filtration and drainage device according to claim 1, characterized in that: The filter-type liquid inlet head (8) comprises a liquid inlet pipe (801), the ends of the connecting pipe (7) and the liquid inlet pipe (801) are both provided with threaded grooves, a filter cartridge (802) is fixedly mounted on one end of the liquid inlet pipe (801), liquid inlet holes (803) are evenly arranged at the lower end of the filter cartridge (802), the interior of the filter cartridge (802) is connected to the outside through the liquid inlet holes (803), and pillars (804) are fixedly mounted in a circular array on the lower end of the outside of the filter cartridge (802), and a rotating cartridge (805) is rotatably engaged with the inside of the filter cartridge (802). The rotating cylinder (805) is in close contact with the interior of the filter cylinder (802); adjustment grooves (806) are provided on both sides of the upper end of the filter cylinder (802); adjustment rotating rods (807) are fixedly installed on both sides of the upper end of the rotating cylinder (805); the adjustment rotating rod (807) is clamped in the adjustment groove (806), and the upper end of the adjustment rotating rod (807) extends through the adjustment groove (806) to the upper part of the outside of the filter cylinder (802); and liquid inlet grooves (808) are evenly provided on the side walls of the filter cylinder (802) and the rotating cylinder (805).

7. The oil and gas well produced liquid separation, filtration and drainage device according to claim 6, characterized in that: The connecting assembly (9) comprises a rigid connecting tube (901), and first rotation grooves (902) are provided on the outer sides of both ends of the rigid connecting tube (901). A first connecting ring (903) is rotatably clamped in the first rotation groove (902), and the first connecting ring (903) is threadedly connected to the end of the connecting tube (7) and the liquid inlet tube (801).

8. The oil and gas well produced liquid separation, filtration and drainage device according to claim 7, characterized in that: The connecting assembly (9) further comprises a second connecting ring (904), the second connecting ring (904) being threadedly connected to the ends of the connecting pipe (7) and the liquid inlet pipe (801), a flexible connecting pipe (905) being fixedly installed between the second connecting rings (904), a second rotating groove (906) being provided at the middle position of the outer side of the second connecting ring (904), a connecting plate (907) being rotatably clamped in the second rotating groove (906), the connecting plate (907) being octagonal in shape, and rotating plates (908) being fixedly installed at both ends of the connecting plate (907), The rotating plate (908) is located on both sides of the flexible connecting tube (905), and a rotating hole (909) is provided at the other end of the rotating plate (908), a rotating pin (9010) is rotatably clamped in the rotating hole (909), and the rotating plate (908) is rotatably connected through the rotating pin (9010), and a limiting screw hole (9011) is provided in a circumferential array on the rotating plate (908), and the limiting screw holes (9011) are distributed in a circumferential array around the rotating hole (909), and a limiting bolt (9012) is threadedly installed in the limiting screw hole (9011).

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