High pressure flow automatic control instrument fouling cleaning device and method of use thereof

Abstract

The application discloses a high-pressure flow automatic controller dirt cleaning device and a use method thereof. The dirt scraping tool in the device comprises a large scraper provided with a large scraper cutter and a small scraper provided with a small scraper cutter. The body of the small scraper is installed in the body of the large scraper. A connecting fixing cap is fixedly connected with a vortex shell of the high-pressure flow automatic controller. The large scraper and the small scraper are respectively provided with a large scraper hand wheel guide rail and a small scraper hand wheel guide rail. The large scraper can move in the vortex shell of the connecting fixing cap and the lower automatic controller. The small scraper can move up and down in the body of the large scraper, the vortex shell of the automatic controller and the connecting pipeline between the vortex shell and an upper valve. The flushing tool comprises a forward flushing pipeline and a back flushing pipeline. The application can significantly improve the dirt cleaning work efficiency of the automatic controller, reduce the labor intensity of workers, prolong the service life of the automatic controller and reduce the production cost.

Description

Technical Field

[0001] This invention relates to cleaning tools for high-pressure flow controllers used in water injection in the petroleum industry, and in particular to a dirt cleaning device for high-pressure flow controllers and its usage method. Background Technology

[0002] After an oil field is put into development, as the extraction time increases, the energy of the oil layer itself will be continuously consumed, causing the oil layer pressure to drop continuously. A large amount of underground crude oil will degas and increase in viscosity, resulting in a significant reduction in oil well production, or even cessation of production, leaving a large amount of dead oil underground that cannot be extracted.

[0003] In order to compensate for the underground deficit caused by crude oil extraction, maintain or increase reservoir pressure, achieve high and stable oil production, and obtain a high recovery rate, it is necessary to inject water into the oil field.

[0004] Water injection is a crucial method for replenishing formation energy and enhancing oil recovery during oilfield development. The level of water injection well management technology directly impacts the success of oilfield development and, consequently, its lifespan.

[0005] Currently, oilfields have entered the era of information management. Information instruments and equipment are installed in the water injection process of water injection wells. The high-pressure flow automatic controller is one of the main equipment commonly used in oilfield water injection. It consists of two parts: a metering part and an electric regulating valve for adjusting the water volume.

[0006] The metering section of the high-pressure flow controller mainly consists of a meter head, a shielded box amplifier board, and a vortex core. The vortex core, connected to the meter head, is installed inside the vortex housing, which is connected to the upstream valve via a connecting pipeline. The vortex core contains a magnet, a triangular baffle, and a magnetic core. When water flows through the magnet and magnetic core, a vortex is formed under the action of the triangular baffle. The magnetic core and magnet generate a weak electrical signal under the action of the vortex. The sensor under the shielded box transmits this signal to the amplifier board, which senses the water volume, converts it into a digital value, and generates a metered water volume.

[0007] Because the vortex housing contains magnets, triangular baffles, and magnetic cores, when water flows through these components, impurities in the water are adsorbed by them. Over time, this forms dirt that adheres to the inner wall of the vortex housing, affecting the normal operation of the automatic control device.

[0008] The electric regulating valve is driven by the motor of the high-pressure flow controller. In general, the electric regulating valve is remotely controlled to open and close according to the water injection requirements, thereby controlling the water injection volume of the high-pressure flow controller. Its performance is affected by the metering part. If the metering part of the controller is scaled or blocked, it will affect the normal use of the electric regulating valve, make it impossible to remotely control the opening and closing of the electric regulating valve, and make it impossible to adjust the water injection volume.

[0009] High-pressure flow controllers are precision instruments; improper use and maintenance can lead to malfunctions or even equipment damage. The inner wall of the vortex housing must be thoroughly cleaned of dirt; otherwise, it can cause obstruction during vortex core descent, deformation, or damage, resulting in inaccurate measurements. The valve core, valve sleeve, and seals of the electric regulating valve are precisely fitted; impurities entering the valve can affect its operation, and in severe cases, prevent the valve from rotating, thus hindering water flow regulation and impacting normal production in the injection well. Cleaning the vortex housing is part of the daily management work for oilfield workers, while the outer surface of the vortex core is handled by specialized instrument maintenance personnel. Proper management of water injection instrumentation equipment has become a crucial task in current production sites, playing a vital role in oilfield development.

[0010] The high-pressure flow controller is installed between the upstream and downstream valves in the water injection process. The inlet of the vortex casing is connected to the upstream valve via a 50 mm diameter, 500 mm long pipeline, while the electric regulating valve is installed at the rear of the metering section in a horizontal direction. During water injection, the high-pressure flow controller is used to regulate the water volume. However, the controller is frequently damaged by impurities in the injected water, adversely affecting production. The main cause is scaling on the vortex casing and the connecting pipeline to the upstream valve, which is the primary reason for the controller's damage and malfunction. Therefore, oilfield workers frequently clean the controller, which not only disrupts normal water injection from the injection wells but also increases the workload of daily management.

[0011] Currently, there are no specialized tools available on the production site for cleaning the vortex housing and connecting pipelines of the automatic control unit. Cleaning is typically done using a homemade shovel to remove impurities from the inner wall of the vortex housing and the inner cavity of the connecting pipelines; or by using a wire brush mounted on a hand drill. The removed dirt is then pumped out using a water pump or wiped clean with cotton yarn. The problems with these cleaning methods are: 1. For severe scaling, shovels or wire brushes are incomplete: Generally, only screwdrivers and flat chisels are used, which cannot thoroughly clean the heavily scaled connecting pipelines. Impurities removed from the vortex housing fall into the connecting pipelines of the automatic control unit. Due to the long length and small inner diameter of the connecting pipelines, impurities falling through the connecting pipelines onto the upstream valve gate cannot be retrieved; after the automatic control unit is installed and filled with water, impurities at the upstream valve gate will still clog the vortex housing and connecting pipelines, preventing the high-pressure flow automatic control unit from measuring and controlling the electric regulating valve.

[0012] 2. The pumping pipe of a bottled water pump is relatively thin, and impurities can easily clog its channel, making it difficult to pump out the water.

[0013] 3. When debris falls into the gate of the upstream valve, it cannot be removed because the connecting pipeline is long and has a small diameter. This affects the installation of the vortex core of the cleaned or newly installed automatic control instrument, causing the high-pressure flow automatic control instrument to malfunction and affecting production.

[0014] Due to water quality issues, the automatic control unit suffers from severe scaling, making it difficult to clean. This task is performed monthly, with each unit taking an average of 60 minutes to clean, significantly increasing the workload for operators. Frequent maintenance also leads to damage to control unit components, causing substantial economic losses for the company.

[0015] To address the aforementioned issues, the operators have undertaken numerous tasks and achieved some success. Following a search, the following relevant technologies have been found: 1. Patent application CN202123367611.4 discloses a valve core removal tool for a high-pressure flow controller. This tool includes a support cylinder and a thrust bearing. A connecting screw is installed inside the support cylinder. The lower part of the connecting screw has a slip mounting cylinder with at least two slips. Each slip has a valve core retaining step at its lower part. The slips are installed in the slip mounting cylinder of the connecting screw and connected to the inner wall of the cylinder. A handwheel is installed on the upper part of the connecting screw. The thrust bearing is installed outside the connecting screw between the handwheel and the support cylinder. When the valve core of the high-pressure flow controller is not stuck, this tool can remove it without the need for other auxiliary tools or a lever. Even in the special case of a stuck valve core, only one lever is needed. Using this tool to remove the valve core of the high-pressure flow controller is quick, significantly improving work efficiency and reducing the labor intensity of workers.

[0016] The aforementioned high-pressure flow controller valve core removal tool is a specialized tool used when the valve core of the high-pressure flow controller is not stuck. It cannot be used to clean the high-pressure flow controller.

[0017] 2. The high-pressure flow controller valve core extractor disclosed in patent application number CN201921928483.6 includes a support sleeve, a pull tube, and a core rod. The pull tube has a pull nut at its upper part and an expansion body with a longitudinal groove at its lower end. The core rod has a tapered lower part and a core rod tension nut at its upper part. The tapered lower part of the core rod cooperates with the expansion body at the lower end of the pull tube. The core rod is inserted into the pull tube, which is then installed in the center hole of the support sleeve. By rotating the core rod tension nut, the core rod moves upward, expanding the expansion body at the lower end of the pull tube, achieving internal self-locking within the valve sleeve of the high-pressure flow controller. This allows the valve sleeve and valve core to be removed together from the pressure reducing chamber of the controller. The operation is simple, safe, and significantly reduces the operation time for repairing the valve core of the high-pressure flow controller.

[0018] The aforementioned high-pressure flow controller valve core extractor is a special tool that achieves internal locking within the valve sleeve of the high-pressure flow controller, allowing the valve sleeve and valve core to be removed together from the pressure reducing chamber of the controller. However, it cannot be used to clean the high-pressure flow controller.

[0019] 3. Patent application number CN202120708813.1 discloses a valve core removal device for a high-pressure flow controller for steady-flow water distribution, which aims to improve the valve core removal efficiency and reduce the labor intensity of workers. The removal device includes a pull rod, with a stop block fixedly sleeved on the upper part of the pull rod and a sliding hammer movably sleeved on the middle part of the pull rod; the lower part of the pull rod is provided with an external thread, and an adjusting nut and a positioning nut are sleeved on the pull rod; a pointed conical top is fixedly installed below the pull rod, and the top is inserted into a segmented elastic claw, and the longitudinal movement of the top can cause the segmented elastic claw to unfold.

[0020] The aforementioned valve core removal device for a high-pressure flow controller is a specialized tool used to remove the valve core by combining a pull rod sleeve with an adjusting nut and a positioning nut. It cannot clean the high-pressure flow controller.

[0021] Currently, the tools available at production sites are for repairing and removing high-pressure flow controllers; however, cleaning tools for high-pressure flow controllers urgently need to be developed. Summary of the Invention

[0022] To address the aforementioned problems, this invention provides a high-pressure flow controller dirt cleaning device and its usage method. This device is used to clean dirt from the vortex housing of the high-pressure flow controller and from the connecting pipeline between it and the upstream valve, while simultaneously rinsing away scraped-off impurities. This shortens the cleaning time of the controller, improves cleaning efficiency, protects production equipment, and reduces production costs.

[0023] To achieve the above objectives, the present invention provides the following technical solution: a dirt cleaning device for a high-pressure flow controller, comprising a dirt scraping tool and a rinsing tool, wherein: the dirt scraping tool includes a large scraper equipped with a large scraper blade and a small scraper equipped with a small scraper blade, the body of the small scraper being installed in the body of the large scraper, and a connecting fixing cap being fixedly connected to the vortex housing of the high-pressure flow controller; the large scraper and the small scraper are respectively provided with a large scraper handwheel guide rail and a small scraper handwheel guide rail; the large scraper force application handle of the large scraper is connected to the large scraper handwheel guide rail by a positioning bolt. The connection allows the large scraper to move within the connecting cap and the vortex housing of the lower automatic control unit; the small scraper's force-applying handle is connected to the small scraper's handwheel guide rail via positioning bolt two, allowing the small scraper to move up and down within the body of the large scraper, the vortex housing of the automatic control unit, and the connecting pipeline between it and the upstream valve; the flushing tool includes a forward flushing pipeline and a backflushing pipeline. One end of the forward flushing pipeline is connected to the valve in the water injection process, and the other end is connected to the body of the small scraper; one end of the backflushing pipeline is connected to the connecting cap, and the other end is connected to the valve in the water injection process.

[0024] Preferably, the handwheel guide rails of the large scraper and the small scraper are both longitudinal grooves formed on both sides of the body of the large scraper and the body of the small scraper; the groove widths of the two handwheel guide rails of the large scraper and the small scraper are respectively greater than the outer diameters of the first positioning bolt and the second positioning bolt, and the groove lengths of the two handwheel guide rails of the large scraper and the small scraper are respectively greater than the depth of the vortex housing of the automatic control instrument and the depth of the connecting pipeline between the vortex housing and the upstream valve.

[0025] Preferably, the body of the large scraper is provided with internal and external threads, which are respectively threaded to the small scraper and the connecting fixing cap; the large scraper force-applying handle and the small scraper force-applying handle are respectively fixedly connected to handle fixing ring one and handle fixing ring two, and are connected to the large scraper handwheel guide rail and the small scraper handwheel guide rail by positioning bolt one and positioning bolt two respectively installed in handle fixing ring one and handle fixing ring two.

[0026] Preferably, the large scraper blade is fixed in the scraper groove on the lower outer circle of the large scraper blade connector connected to the lower end of the large scraper by a fixing bolt. The large scraper blade connector is connected to the lower end of the large scraper body by a thread and further fixed radially by a fixing bolt. A sealing ring is installed between the lower end of the large scraper body and the large scraper blade connector.

[0027] Preferably, the small scraper blade is fixed in the scraper groove on the lower outer circle of the small scraper blade connector connected to the lower end of the small scraper by a fixing bolt; the small scraper blade connector is threaded to the lower end of the small scraper body and is further fixed radially by a fixing bolt or welded.

[0028] Preferably, the connecting fixing cap is provided with a flushing chamber, a flange, and a sealing step. The flushing chamber has a flushing pipeline connection port in its cavity wall. The height of the flushing chamber above the flushing pipeline connection port is greater than the total height of the sealing ring and the large scraper connector. The flange has flange bolt holes. The sealing step is pressed between the upper pressure cover sealing gasket on the inner wall of the vortex shell and the flange. The flange is connected to the vortex shell through the flange bolt holes and the upper pressure cover bolts and nuts of the vortex shell.

[0029] Preferably, the outer diameter formed by the large scraper blade matches the inner wall of the vortex shell and is smaller than the diameter of the center hole of the flange and the sealing step; the outer diameter formed by the small scraper blade matches the inner diameter of the connecting pipeline between the vortex shell and the upstream valve and is smaller than the diameter of the center hole of the large scraper blade connector.

[0030] Preferably, the forward flushing pipeline mainly consists of a bend 1, a threaded joint 1, an oil collar 1, and a connecting pipeline 1. One end of the bend 1 is connected to the top of the small scraper body, and the other end is sequentially threaded to the threaded joint 1, the oil collar 1, and the connecting pipeline 1. The backflushing pipeline is provided with a connecting pipeline 2, a bend 2, a threaded joint 2, an oil collar 2, and a connecting pipeline 3. One end of the connecting pipeline 2 is threaded or welded to the flushing pipeline connection port in the connecting fixing cap, and the other end is sequentially threaded to the bend 2, the threaded joint 2, the oil collar 2, and the connecting pipeline 3.

[0031] Preferably, the first bend is connected to the body of the small scraper via a quick connector or bearing. The outlet ends of the first and third connecting pipes can also be connected to a flexible pipe and then to a sewage tank, facilitating the adjustment of the distance between this device and the vent valve in the adjacent water injection process.

[0032] The method of using the dirt cleaning device for the high-pressure flow controller includes the following steps: A. Scraping the dirt in the vortex housing and connecting pipeline of the high-pressure flow controller; B. Rinsing the dirt debris scraped off from the vortex housing and connecting pipeline.

[0033] Preferably, the specific operating procedure for step A is as follows: a) Prepare the water injection process according to the standardized operation requirements for stopping water injection in the injection well; b) Remove the meter head in the metering part of the automatic control instrument, remove the upper pressure cap nut in the vortex housing, remove the upper pressure cap, and take out the vortex core; c) Rotate the connecting fixing cap in the cleaning device to the lower part of the large scraper body; d) Press the sealing step in the flange onto the upper pressure cap sealing gasket of the sealing step in the inner cavity of the vortex housing, and connect it through the bolts and nuts of the upper pressure cap in the vortex housing; e) Rotate the large scraper force handle, and drive the large scraper and the large scraper blade to rotate together through the positioning bolt one, scraping off the impurities on the inner wall of the vortex housing; f) Rotate the small scraper force handle, and drive the small scraper and the small scraper blade to rotate together through the positioning bolt two, scraping off the impurities on the inner wall of the connecting pipeline between the vortex housing and the upstream valve; The specific operating procedure for step B is as follows: g. Reverse the large scraper's force-applying handle to retract the large scraper and its blade to above the flushing pipeline connection port inside the connecting cap, allowing space for liquid flow; h. Rotate the small scraper's force-applying handle to allow the small scraper blade to reach the inner cavity of the vortex shell, and adjust the distance between the flushing pipeline and the gate of the adjacent water injection process vent valve; i. During forward flushing, connect connecting pipeline one to the adjacent water injection process vent valve, and connect connecting pipeline three and / or the flexible pipeline to the sewage tank; j. During backflushing, connect connecting pipeline three in the backflushing pipeline to the vent valve in the adjacent water injection process, and connect connecting pipeline one and / or the flexible pipeline to the sewage tank; k. Disassemble the cleaning device, install the vortex core, and restore the high-pressure flow controller; l. According to the standardized operation requirements for opening a water injection well, reverse the water injection process and resume production.

[0034] Preferably, during the rinsing process in steps i and j, the small scraper handle can be rotated to allow the small scraper blade to move up and down between the vortex housing and the connecting pipeline.

[0035] The significant advantages of this invention are: 1. This invention can both scrape off dirt and flush it out of the automatic control device, making it very suitable for cleaning high-pressure flow automatic control devices in the water injection process of oil fields.

[0036] Scraping function: This invention adopts the working principle of a pipe scraper, and manufactures two scrapers of different diameters. One is used to clean the inner wall of the vortex shell, and the other is used to clean the inner wall of the connecting pipeline connected to the upstream valve. This device is installed on the upper surface of the upper pressure plate of the vortex shell through a connecting and fixing cap, and is fixed with the flange bolts and nuts of the upper pressure plate to form a fulcrum.

[0037] Turn the large scraper handle to apply force. Under the reaction force of the connecting cap and the large scraper, the large scraper moves downward and scrapes off the impurities on the inner wall of the vortex housing through the scraper blade. Then turn the small scraper handle to apply force to scrape off the impurities on the inner wall of the connecting pipeline, ensuring that the inner wall of the vortex housing and the connecting pipeline are completely cleaned.

[0038] 2. Flushing function: This device has two different flushing methods through the forward flushing pipeline and the back flushing pipeline. It can flush out the impurities in the vent valves of the adjacent water injection process connected to this device, the connecting pipelines, and the inner wall of the vortex shell, so as to ensure the normal operation of the automatic control instrument.

[0039] 3. Using this invention to clean the high-pressure flow controller offers several advantages: First, the cleaning process for the inner wall of the vortex housing and connecting pipelines is simple, time-saving, labor-saving, and thoroughly removes dirt. Second, it can flush impurities from the inner wall of the vortex housing and connecting pipelines using both forward and backwashing methods, without damaging the high-pressure flow controller, and the flushing effect is significant.

[0040] 4. Through cleaning and maintenance tests on high-pressure flow controllers, this invention has proven that each scraping and rinsing cleaning session takes approximately 10 minutes, saving about 50 minutes compared to previous cleaning and rinsing methods, thus significantly reducing maintenance and cleaning time. Because the scraping and rinsing are thorough, the vortex shell and the inner walls of the connecting pipelines are smooth and clean after cleaning, significantly extending the maintenance cycle for high-pressure flow controllers prone to blockages.

[0041] 5. Before this special tool was available, the vortex housing and connecting pipelines of the automatic control unit had to be cleaned on average once a month; after using this special tool, it only needs to be cleaned once every six months, which significantly reduces the workload of maintenance personnel and improves water injection efficiency.

[0042] 6. This invention significantly improves the efficiency of cleaning and maintaining the automatic control instrument, ensuring its long-term normal operation after cleaning. It effectively enhances water injection management, reduces worker workload, extends the instrument's lifespan, and lowers production costs. This invention generates significant economic benefits and has considerable potential for widespread application. Attached Figure Description

[0043] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a front view of a schematic diagram of the structure of the present invention.

[0044] Figure 2 for Figure 1 A bottom view.

[0045] Figure 3 for Figure 1 Top view.

[0046] Figure 4 for Figure 1 A partial structural cross-sectional view of the connecting and fixing cap in the middle.

[0047] In the picture: 1. Flange; 2. Sealing step; 3. Connecting cap; 4. Large scraper; 5. Large scraper handwheel guide rail; 6. Sealing ring; 7. Large scraper connector; 8. Large scraper blade; 9. Fixing bolt one; 10. Small scraper blade; 11. Fixing bolt two; 12. Handle fixing ring one; 13. Large scraper force-adjusting handle; 14. Positioning bolt one; 15. Small scraper; 16. Handle fixing ring two; 17. Small scraper force-adjusting handle; 18. Positioning bolt two; 19. Small scraper handwheel guide rail; 20. Elbow one; 21. Threaded joint one; 22. Oil collar one; 23. Connecting pipeline one; 24. Connecting pipeline two; 25. Elbow two; 26. Threaded joint two; 27. Connecting pipeline three; 28. Flange bolt hole; 29. Detailed Implementation

[0048] The accompanying drawings are for reference and illustration only and are not intended to limit the scope of protection of this invention. The technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0050] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] See Figure 1 - Figure 4The high-pressure flow controller's dirt cleaning device includes a dirt scraping tool and a rinsing tool. The dirt scraping tool comprises a large scraper 4 equipped with a large scraper blade 8 and a small scraper 15 equipped with a small scraper blade 10. The body of the small scraper 15 is installed within the body of the large scraper 4, and a connecting cap 3 is fixedly connected to the vortex housing of the high-pressure flow controller. The large scraper 4 and small scraper 15 are respectively equipped with a large scraper handwheel guide rail 5 and a small scraper handwheel guide rail 19. The large scraper force-applying handle 13 of the large scraper 4 is connected to the large scraper handwheel guide rail 5 via a positioning bolt 14, enabling the large scraper... Device 4 can move within the vortex housing of the connecting cap 3 and the lower automatic control unit; the small scraper handle 17 of the small scraper 15 is connected to the small scraper handwheel guide rail 19 via positioning bolt 2 18, allowing the small scraper 15 to move up and down within the body of the large scraper 4, the vortex housing of the automatic control unit, and the connecting pipeline between the large scraper 4 and the upstream valve; the flushing tool includes a forward flushing pipeline and a backflushing pipeline, one end of the forward flushing pipeline is connected to the valve in the water injection process, and the other end is connected to the body of the small scraper 15; one end of the backflushing pipeline is connected to the connecting cap 3, and the other end is connected to the valve in the water injection process.

[0052] This invention uses a connecting cap 3 to fix the vortex housing of the automatic control instrument. To clean the dirt in the vortex housing of the automatic control instrument and the connecting pipeline between it and the upstream valve, a large scraper 4 equipped with a large scraper blade 8 and a small scraper 15 equipped with a small scraper blade 10 are provided, forming a dirt scraping tool. Simultaneously, the small scraper 15 can move up and down within the large scraper 4 under the action of the small scraper force handle 17 and the second positioning bolt 18; the large scraper 4 can move within the vortex housing of the automatic control instrument under the action of the large scraper force handle 13 and the first positioning bolt 14.

[0053] This invention enables the scraping and cleaning of dirt in the vortex shell and connecting pipelines. Compared with existing cleaning devices, the cleaning is more convenient, cleaner, and faster, and it also achieves scraping and cleaning of small-diameter connecting pipelines. Simultaneously, the scraped dirt can be flushed by a flushing tool consisting of a forward flushing pipeline and a backflushing pipeline. One end of the forward flushing pipeline is connected to a valve in the water injection process, and the other end is connected to the body of the small scraper 15. One end of the backflushing pipeline is connected to the connecting cap 3, and the other end is connected to a valve in the water injection process. The high-pressure water flow in the water injection process effectively flushes away the scraped dirt, making the process convenient, fast, and without damaging the high-pressure flow controller. The small scraper 15 can move up and down within the tool, further improving the flushing effect. This invention effectively improves the maintenance efficiency of the high-pressure flow controller, ensures the normal operation of the instrument, and guarantees the normal operation of production. This also ensures smooth installation when replacing new parts and installing the cleaned vortex core. It prevents the vortex core from being obstructed during installation, deformed, or damaged due to the inability to remove the cleaned dirt and debris. It also avoids inaccurate measurements caused by the inability to remove dirt and debris.

[0054] Based on the above embodiment one, the present invention also has the following embodiments: A preferred embodiment: The large scraper handwheel guide rail 5 and the small scraper handwheel guide rail 19, provided in the large scraper 4 and the small scraper 15, are both longitudinal grooves formed on both sides of the body of the large scraper 4 and the body of the small scraper 15; the groove widths of the two large scraper handwheel guide rails 5 and the small scraper handwheel guide rails 19 are respectively greater than the outer diameters of the positioning bolt 14 and the positioning bolt 2 18, and the groove lengths of the two large scraper handwheel guide rails 5 and the small scraper handwheel guide rails 19 are respectively greater than the depth of the vortex housing of the automatic control instrument and the depth of the connecting pipeline between the depth of the vortex housing and the upstream valve. This allows the large scraper blade 8 in the large scraper 4 and the small scraper blade 10 in the small scraper 15 to respectively pass through the connecting fixing cap 3 and enter the inner cavity of the vortex housing, and pass through the connecting fixing cap 3 and the inner cavity of the vortex housing to enter the connecting pipeline.

[0055] In a preferred embodiment: the body of the large scraper 4 has internal and external threads, which are threadedly connected to the small scraper 15 and the connecting cap 3, respectively; the large scraper force-applying handle 13 and the small scraper force-applying handle 17 in the large scraper 4 and the small scraper 15 are respectively fixedly connected to the handle fixing ring 12 and the handle fixing ring 16, and are connected to the large scraper handwheel guide rail 5 and the small scraper handwheel guide rail 19 by positioning bolts 14 and 18 respectively installed in the handle fixing ring 12 and the handle fixing ring 16. The fixed connection between the large scraper force-applying handle 13 and the small scraper force-applying handle 17 and the handle fixing ring 12 and the handle fixing ring 16 can be welding, threaded connection, or plug-in connection.

[0056] In a preferred embodiment: the large scraper blade 8 is fixed in the scraper groove on the lower outer circle of the large scraper blade connector 7 connected to the lower end of the large scraper 4 by a fixing bolt 9. The large scraper blade connector 7 is connected to the lower end of the body of the large scraper 4 by a thread and further fixed radially by a fixing bolt. A sealing ring 6 is installed between the lower end of the body of the large scraper 4 and the large scraper blade connector 7.

[0057] In a preferred embodiment: the small scraper blade 10 is fixed in the scraper groove on the outer circumference of the lower end of the small scraper connector connected to the lower end of the small scraper 15 by a fixing bolt 2 11; the small scraper connector is threaded to the lower end of the small scraper 15 body and is further fixed radially by a fixing bolt or by welding.

[0058] In a preferred embodiment: the connecting cap 3 is provided with a flushing chamber, a flange 1, and a sealing step 2. The flushing chamber has a flushing pipeline connection port in its wall. The height of the flushing chamber above the flushing pipeline connection port is greater than the total height of the sealing ring 6 and the large scraper connector 7. The flange 1 has a flange bolt hole 29. The sealing step 2 is pressed between the upper pressure cover sealing gasket on the inner wall of the vortex shell and the flange 1. The flange 1 is connected to the vortex shell through the flange bolt hole 29 and the upper pressure cover bolts and nuts of the vortex shell.

[0059] In a preferred embodiment: the outer diameter of the large scraper blade 8 matches the inner wall of the vortex housing and is smaller than the diameter of the central hole of the flange 1 and the sealing step 2; the outer diameter of the small scraper blade 10 matches the inner diameter of the connecting pipeline between the vortex housing and the upstream valve and is smaller than the diameter of the central hole of the large scraper blade connector 7.

[0060] In a preferred embodiment: the forward flushing pipeline mainly consists of a bend 20, a threaded joint 21, an oil collar 22, and a connecting pipeline 23. One end of the bend 20 is connected to the top of the small scraper 15 body, and the other end is sequentially threaded to the threaded joint 21, the oil collar 22, and the connecting pipeline 23. The backflushing pipeline is provided with a connecting pipeline 24, a bend 25, a threaded joint 26, an oil collar 27, and a connecting pipeline 38. One end of the connecting pipeline 24 is threaded or welded to the flushing pipeline connection port in the connecting fixing cap 3, and the other end is sequentially threaded to the bend 25, the threaded joint 26, the oil collar 27, and the connecting pipeline 38.

[0061] In a preferred embodiment, the bend 20 is connected to the body of the small scraper 15 via a quick connector or bearing. The outlet ends of the connecting lines 23 and 28 can also be connected to a flexible pipeline and, through the flexible pipeline, to a wastewater tank. This facilitates adjustment of the distance between the device and the vent valve in the adjacent water injection process. The connection between the bend 20 and the body of the small scraper 15 via a quick connector or bearing prevents the upward flushing pipeline above the small scraper 15 from rotating during scraping operations, thus facilitating operation.

[0062] One side of the connecting fixing cap 3 is connected to the connecting pipeline 24 by thread or welding, and then connected to the elbow 25, the threaded joint 26, the oil joint 27, and the connecting pipeline 3 28. It can be used as a backwash pipeline or as an outlet pipeline during forward flushing. Similarly, the forward flushing pipeline can also be used as an outlet pipeline during backwashing.

[0063] The bend 20 and bend 25 in the forward and backwash pipelines can be adjusted to change the direction of the flushing pipeline at any time according to the pipeline routing at the production site; the connection between thread 21 and oil joint 22, and the connection between thread 26 and oil joint 27, facilitates the disassembly and assembly of the pipelines; the method of using the dirt cleaning device for the high-pressure flow controller includes the following steps: A. Scraping the dirt in the vortex housing and connecting pipelines of the high-pressure flow controller; B. Flushing the dirt debris scraped off from the vortex housing and connecting pipelines.

[0064] A preferred embodiment: The specific operating procedure for step A is as follows: a) Prepare the water injection process according to the standardized operation requirements for stopping water injection in a water injection well; in this step, close the upstream and downstream valves in the water injection process, open the venting valve, and wait for the pressure to be released before operation; b) Remove the meter head in the metering part of the automatic control instrument, remove the upper pressure cap nut in the vortex housing, remove the upper pressure cap, and take out the vortex core; c) Rotate the connecting fixing cap 3 in the cleaning device to the lower part of the body of the large scraper 4; d) Press the sealing step 2 in the flange 1 into the inner cavity of the vortex housing. e. The upper pressure cover sealing gasket of the sealing step is connected by bolts and nuts to the upper pressure cover in the vortex housing; f. Rotate the large scraper force handle 13, which drives the large scraper 4 and the large scraper blade 8 to rotate together through the positioning bolt 14, scraping off the impurities on the inner wall of the vortex housing; g. Rotate the small scraper force handle 17, which drives the small scraper 15 and the small scraper blade 10 to rotate together through the positioning bolt 2 18, scraping off the impurities in the inner wall of the connecting pipeline between the vortex housing and the upstream valve; The specific operation procedure of step B is as follows: g. Reverse rotation The large scraper lever 13 retracts the large scraper 4 and the large scraper blade 8 to above the flushing pipeline connection port inside the connecting cap 3, creating space for liquid flow. At this time, the sealing ring 6 is squeezed between the large scraper connector 7 and the connecting cap 3, providing a seal. h. Rotate the small scraper lever 17 to allow the small scraper blade 10 to reach the inner cavity of the vortex housing, adjusting the distance between the flushing pipeline and the gate of the adjacent water injection process vent valve. i. During forward flushing, connect the first connecting pipeline 23 to the adjacent water injection process vent valve, and connect the third connecting pipeline 28 and... / or a flexible pipeline is connected to the drain tank; during this process, the vent valve of the adjacent water injection process is opened, and the high-pressure water in the water injection process enters the small scraper 15 through connecting pipeline 1 23, oil joint 1 22, threaded joint 1 21 and bend 1 20 and enters the body cavity of the large scraper 4 and the connecting fixing cap 3 through the small scraper handwheel guide rail 19. The debris and impurities in the annulus of the cleaning device are flushed into the drain tank through the connecting fixing cap 3, connecting pipeline 2 24, bend 2 25, threaded joint 2 26, oil joint 2 27, connecting pipeline 3 28 and / or flexible pipeline. j. During backwashing, connect the connecting line 3 28 in the backwash pipeline to the vent valve in the adjacent water injection process, and connect the connecting line 1 23 and / or the flexible pipeline to the sludge tank. In this step, open the vent valve in the adjacent water injection process. The high-pressure water in the process enters the connecting cap 3 through the connecting line 3 28, the oil connector 27, the threaded connector 26, the elbow 25, and the connecting line 24. The debris and impurities flushed into the annulus of the cleaning device enter the sludge tank through the small scraper 15, the elbow 1 20, the threaded connector 21, the oil connector 22, the connecting line 1 23, and / or the flexible pipeline. k. Disassemble the cleaning device, install the vortex core, and restore the high-pressure flow controller. l. According to the standardized operation requirements for opening the water injection well, reverse the water injection process and resume production.

[0065] In a preferred embodiment: during the rinsing processes in steps i and j, the small scraper handle 17 can be rotated to allow the small scraper blade 10 to move up and down between the vortex housing and the connecting pipeline. This up-and-down movement of the small scraper blade 10 between the vortex housing and the connecting pipeline ensures a more thorough rinsing of both the vortex housing and the connecting pipeline.

[0066] The embodiments described above are merely typical examples, but the present invention is not limited to these embodiments. Those skilled in the art can make modifications without departing from the spirit and teachings of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the inventive spirit and concept of the present invention should be included within the protection scope of the present invention. Therefore, the protection scope is not limited to the above description.

Claims

1. A high-pressure flow controller dirt cleaning device, characterized in that, The device includes a dirt scraping tool and a rinsing tool. The dirt scraping tool includes a large scraper (4) equipped with a large scraper blade (8) and a small scraper (15) equipped with a small scraper blade (10). The body of the small scraper (15) is installed in the body of the large scraper (4), and the connecting cap (3) is fixedly connected to the vortex housing of the high-pressure flow controller. The large scraper (4) and the small scraper (15) are respectively equipped with a large scraper handwheel guide rail (5) and a small scraper handwheel guide rail (19). The large scraper force handle (13) of the large scraper (4) is connected to the large scraper handwheel guide rail (5) through a positioning bolt (14), so that the large scraper ( 4) It can move in the vortex housing of the connecting fixed cap (3) and the lower automatic control instrument; the small scraper force handle (17) of the small scraper (15) is connected to the small scraper handwheel guide rail (19) through the positioning bolt two (18), so that the small scraper (15) can move up and down in the body of the large scraper (4), the vortex housing of the automatic control instrument and the connecting pipeline between the upstream valve; the flushing tool includes a forward flushing pipeline and a back flushing pipeline. One end of the forward flushing pipeline is connected to the valve in the water injection process and the other end is connected to the body of the small scraper (15); one end of the back flushing pipeline is connected to the connecting fixed cap (3) and the other end is connected to the valve in the water injection process.

2. The high-pressure flow controller dirt cleaning device as described in claim 1, characterized in that, The large scraper handwheel guide rail (5) and the small scraper handwheel guide rail (19) provided in the large scraper (4) and the small scraper (15) are both longitudinal grooves opened on both sides of the body of the large scraper (4) and the body of the small scraper (15); the groove width of the two large scraper handwheel guide rails (5) and the small scraper handwheel guide rails (19) is greater than the outer diameter of the positioning bolt one (14) and the positioning bolt two (18), respectively; the groove length of the two large scraper handwheel guide rails (5) and the small scraper handwheel guide rails (19) is greater than the depth of the vortex housing of the automatic control instrument and the depth of the connecting pipeline between the vortex housing and the upstream valve.

3. The high-pressure flow controller dirt cleaning device as described in claim 2, characterized in that, The body of the large scraper (4) is provided with internal and external threads and is threadedly connected to the small scraper (15) and the connecting fixing cap (3) respectively; the large scraper force handle (13) and the small scraper force handle (17) in the large scraper (4) and the small scraper (15) are fixedly connected to the handle fixing ring one (12) and the handle fixing ring two (16) respectively, and are connected to the large scraper handwheel guide rail (5) and the small scraper handwheel guide rail (19) through the positioning bolt one (14) and the positioning bolt two (18) respectively installed in the handle fixing ring one (12) and the handle fixing ring two (16).

4. The high-pressure flow controller dirt cleaning device as described in claim 3, characterized in that, The large scraper blade (8) is fixed in the scraper groove on the outer circle of the lower end of the large scraper connector (7) connected to the lower end of the large scraper (4) by a fixing bolt (9). The large scraper connector (7) is connected to the lower end of the body of the large scraper (4) by a thread and is radially fixed by a fixing bolt. A sealing ring (6) is installed between the lower end of the body of the large scraper (4) and the large scraper connector (7).

5. The high-pressure flow controller dirt cleaning device as described in claim 3, characterized in that, The small scraper blade (10) is fixed in the scraper groove on the outer circle of the lower end of the small scraper connector connected to the lower end of the small scraper (15) by fixing bolt two (11); the small scraper connector is threaded to the lower end of the small scraper (15) body and is radially fixed by adding fixing bolts or welding.

6. The high-pressure flow controller dirt cleaning device as described in claim 4, characterized in that, The connecting cap (3) is provided with a flushing chamber, a flange (1) and a sealing step (2). The flushing chamber has a flushing pipeline connection port in its cavity wall. The height of the flushing chamber above the flushing pipeline connection port is greater than the total height of the sealing ring (6) and the large scraper connector (7). The flange (1) has a flange bolt hole (29). The sealing step (2) is pressed between the upper pressure cover gasket on the inner wall of the vortex shell and the flange (1). The flange (1) is connected to the vortex shell through the flange bolt hole (29) and the upper pressure cover bolts and nuts of the vortex shell.

7. The high-pressure flow controller dirt cleaning device as described in claim 6, characterized in that, The outer diameter formed by the large scraper blade (8) matches the inner wall of the vortex shell and is smaller than the diameter of the center hole of the flange (1) and the sealing step (2); the outer diameter formed by the small scraper blade (10) matches the inner diameter of the connecting pipeline between the vortex shell and the upstream valve and is smaller than the diameter of the center hole of the large scraper connector (7).

8. The high-pressure flow controller dirt cleaning device as described in claim 6, characterized in that, The forward flushing pipeline is mainly composed of a bend (20), a threaded joint (21), an oil joint (22), and a connecting pipeline (23). One end of the bend (20) is connected to the top of the small scraper (15) body, and the other end is connected to the threaded joint (21), the oil joint (22), and the connecting pipeline (23) in sequence. The back flushing pipeline is provided with a connecting pipeline (24), a bend (25), a threaded joint (26), an oil joint (27), and a connecting pipeline (28). One end of the connecting pipeline (24) is threaded or welded to the flushing pipeline connection port in the connecting fixing cap (3), and the other end is connected to the bend (25), the threaded joint (26), the oil joint (27), and the connecting pipeline (28) in sequence.

9. The high-pressure flow controller dirt cleaning device as described in claim 8, characterized in that, The bend (20) is connected to the body of the small scraper (15) via a quick connector or bearing. The outlet ends of the connecting line (23) and the connecting line (28) can also be connected to a flexible line and to the sewage tank via the flexible line.

10. A method of using the dirt cleaning device for the high-pressure flow controller as described in claim 8, characterized in that, Includes the following steps: A. Scrape away the dirt in the vortex housing and connecting pipelines of the high-pressure flow controller; B. Rinse the vortex housing and connecting pipelines to remove dirt and debris scraped off.

11. The method of using the high-pressure flow controller dirt cleaning device as described in claim 10, characterized in that, The specific operation procedure of step A is as follows: a. Prepare the water injection process according to the water injection well shutdown standardization operation requirements; b. Remove the meter head in the metering part of the automatic control instrument, remove the upper pressure cap nut in the vortex shell, remove the upper pressure cap, and take out the vortex core; c. Rotate the connecting fixing cap (3) in the cleaning device to the lower part of the body of the large scraper (4); d. Press the sealing step (2) in the flange (1) onto the upper pressure cap sealing gasket of the sealing step in the inner cavity of the vortex shell, and connect it through the bolts and nuts of the upper pressure cap in the vortex shell; e. Rotate the large scraper force handle (13), and drive the large scraper (4) and the large scraper scraper blade (8) to rotate together through the positioning bolt (14) to scrape off the impurities on the inner wall of the vortex shell; f. Rotate the small scraper force handle (17), and through Positioning bolt two (18) drives the small scraper (15) and the small scraper blade (10) to rotate together, scraping off the impurities in the inner wall of the connecting pipeline between the vortex shell and the upstream valve; the specific operation procedure of step B is as follows: g. Rotate the large scraper force handle (13) in the opposite direction to retract the large scraper (4) and the large scraper blade (8) to the top of the flushing pipeline connection port in the connecting fixing cap (3) to make room for liquid flow; h. Rotate the small scraper force handle (17) to let the small scraper blade (10) reach the inner cavity of the vortex shell and adjust the distance between the flushing pipeline and the gate of the adjacent water injection process vent valve; i. During forward flushing, connect the connecting pipeline one (23) to the adjacent water injection process vent valve, and connect the connecting pipeline three (28) and / or the flexible pipeline to the sewage tank; j. During backwashing, connect the connecting line 3 (28) in the backwashing pipeline to the vent valve in the adjacent water injection process, and connect the connecting line 1 (23) and / or the flexible pipeline to the sewage tank; k. Disassemble the cleaning device, install the vortex core, and restore the high-pressure flow controller; l. According to the standardized operation requirements for opening the water injection well, pour the water injection process and resume production.

12. The method of using the high-pressure flow controller dirt cleaning device as described in claim 11, characterized in that, in During the rinsing process in steps i and j, the small scraper handle (17) can be rotated to allow the small scraper blade (10) to move up and down between the vortex housing and the connecting pipeline.

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