Sucker rod dirt removing device and method

Abstract

The invention provides a sucker rod dirt removing device and method, and relates to the technical field of petroleum extraction equipment maintaining.The sucker rod dirt removing device comprises a main body bearing mechanism, a circulating cleaning mechanism, an injection mechanism, a sealing covering mechanism and a sewage treatment mechanism; the plug pin type placing frame is composed of supporting legs, cross arms and supporting pins, and the supporting legs are fixed to the bottom of the sucker rod collecting box. The multi-layer plug pin type placing frame is adopted, through detachable combination of the supporting legs, the cross arms and the supporting pins, centralized, orderly and three-dimensional placing of the sucker rods is achieved, compared with a traditional scattered placing mode, space is greatly saved, the cross arms can be installed layer by layer, the placing requirements of different numbers of sucker rods are met, cleaning dead corners caused by stacking of the sucker rods are avoided, and the cleaning efficiency is improved. And in cooperation with reciprocating spraying of the long-strip-type drivable spray head, the surface of the sucker rod can be fully covered and evenly cleaned, manual auxiliary cleaning is not needed, and the human input is remarkably reduced.

Description

Technical Field

[0001] This invention relates to the field of oilfield equipment maintenance technology, and in particular to a device and method for removing dirt from sucker rods. Background Technology

[0002] In oil production, the sucker rod, as the core component connecting the wellhead power unit and the downhole plunger, operates under conditions containing wax and oil, easily accumulating large amounts of dirt on its surface. This is especially true in high-wax wells, where the wax buildup cycle on the sucker rod is short and the wax layer is very hard, becoming a major obstacle to pump inspection in oilfields. Currently, the industry commonly uses steam flushing to clean the surface dirt of the sucker rod, combined with manual wire brushes for targeted removal of extremely difficult-to-clean areas.

[0003] Existing cleaning methods have the following drawbacks: steam flushing is time-consuming and energy-intensive, and steam leakage and flushing wastewater can easily cause environmental pollution; manual cleaning requires a large amount of manpower, is labor-intensive and has low cleaning efficiency, making it difficult to ensure uniform cleaning, which in turn affects the quality of well repair; at the same time, the direct discharge of flushing wastewater not only wastes water resources but also exacerbates environmental pollution, which does not meet the industry requirements of green production. Therefore, this invention proposes a sucker rod fouling removal device and method to solve the problems existing in the prior art. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a device and method for cleaning sucker rods. It employs a multi-layer pin-type rack, with detachable and combinable legs, crossbeams, and support pins to achieve centralized and orderly three-dimensional placement of sucker rods. Compared to traditional scattered placement methods, this significantly saves space. The crossbeams can be installed layer by layer to accommodate different numbers of sucker rods, avoiding cleaning dead spots caused by stacked sucker rods. Combined with the reciprocating spray of a long, driveable nozzle, it achieves full-coverage and uniform cleaning of the sucker rod surface, eliminating the need for manual cleaning and significantly reducing labor input.

[0005] To achieve the objectives of this invention, the invention is implemented through the following technical solution: a sucker rod dirt removal device, comprising a main supporting mechanism, a circulating cleaning mechanism, a spraying mechanism, a sealing cover mechanism, and a wastewater treatment mechanism. The main supporting mechanism includes a sucker rod collection box and a built-in pin-type placement rack. The pin-type placement rack consists of legs, a crossbeam, and a support pin. The legs are fixed to the bottom of the sucker rod collection box, and the crossbeam is detachably connected to the legs through the support pin. Several pin-type placement racks are arranged in an orderly manner at different heights to form a multi-layer three-dimensional placement layer.

[0006] The wastewater treatment mechanism is located at the bottom of the sucker rod collection tank and is connected to the circulating cleaning mechanism for purifying and heating the waste liquid; the spraying mechanism is installed on the inner side wall of the sucker rod collection tank and is connected to the circulating cleaning mechanism for spraying cleaning medium into the tank; the sealing cover mechanism covers the top of the sucker rod collection tank to achieve sealing and opening / closing of the tank.

[0007] Further improvements are made in that: the pin-type placement rack is arranged in groups of four with the same height on the left and right sides, and each layer is kept at a preset distance; the crossbeam is a pin-type structure, which is used for layer-by-layer installation to adapt to the placement requirements of sucker rods.

[0008] A further improvement is that the wastewater treatment mechanism includes a return water collection tank, an oil removal device, and an electromagnetic heater; the return water collection tank is internally connected to the sucker rod collection box, and the oil removal device and electromagnetic heater are both located in the return water collection tank. The oil removal device includes a drive motor, a fluid baffle plate, and an oil scraper, and the drive motor drives the oil scraper to move.

[0009] Further improvements include: the back end of the return water collection tank is provided with an oil inlet, the top is provided with a liquid inlet, and the right side is provided with a water outlet; the fluid baffle is used to regulate the flow path of the waste liquid.

[0010] Further improvements are made in that: the circulating cleaning mechanism includes a water pump, pipeline, one-way valve and steam injection port; the water pump is connected to the return water collection tank through the pipeline, the pipeline extends to the inner wall of the sucker rod collection box and is connected to the injection mechanism, the one-way valve and steam injection port are located on the pipeline on the outlet side of the water pump, and the pipeline is also equipped with a shut-off valve and a discharge valve.

[0011] A further improvement is that the spraying mechanism includes a driveable nozzle, a lead screw, a drive motor, and a foldable metal bellows; the driveable nozzle has a long strip structure and is connected to the pipeline through the foldable metal bellows; the drive motor drives the lead screw to rotate, causing the driveable nozzle to reciprocate along the lead screw; and the spraying time is controlled by a preset program through a controller.

[0012] A further improvement is that the sealing and closing mechanism includes an upturnable cover, a hinge device, a sealing gasket, and two sets of switch-assisted mechanisms; the hinge device enables the cover to be hinged to the sucker rod collection box, the sealing gasket is located on the contact surface between the cover and the sucker rod collection box, and the two sets of switch-assisted mechanisms are respectively installed at the front and rear ends of the sucker rod collection box to drive the cover to open and close in coordination.

[0013] Further improvements are made in that: the switch assist mechanism includes a lid-opening push rod, a servo motor, a threaded travel dish, a lead screw, and a support rod; the drive motor drives the lead screw to move the threaded travel dish, the threaded travel dish is hinged to the lid-opening push rod, the lid-opening push rod is hinged to the lid to push the lid to flip, and a fixing block is provided on one side of both ends of the oil extraction rod collection box. The support rod is hinged to the fixing block, and the upper end of the support rod is hinged to the lid. The support rod assists in stabilizing the lid's movement.

[0014] Further improvements include: the cover is made of resin material with built-in angle steel reinforcing ribs, and the cover is equipped with several emergency vents. When the steam pressure inside the sucker rod collection box reaches a certain value, which is the safe pressure that the cover can withstand, the emergency vents will automatically open to release the internal steam. The released steam will be collected and discharged to a safe area outside the well site.

[0015] A method for removing dirt from a sucker rod includes the following steps:

[0016] Install the crossbeams of the pin-type placement rack layer by layer, starting with the bottom layer to place the sucker rods. After each layer is filled, install the next layer of crossbeams and continue placing until all the sucker rods are placed.

[0017] The lid is closed using a sealing mechanism to ensure the box is sealed.

[0018] Add steam, cold water, or hot water through the steam injection port, add special cleaning aids, start the electromagnetic heater to heat the return water to the preset temperature, and start the water pump to pressurize the rinsing medium and deliver it to the spraying mechanism.

[0019] The driveable nozzle of the spraying mechanism sprays the cleaning medium in a waterfall-like manner, while reciprocating under the drive of the screw, extending the spraying time of the wax-covered parts at both ends of the sucker rod according to the preset program of the controller.

[0020] The rinsing waste liquid flows into the return water collection tank, the oil remover removes the oil from the waste liquid, the electromagnetic heater maintains the temperature of the waste liquid, and the water pump circulates the purified and heated waste liquid to the spraying mechanism to achieve circulating cleaning.

[0021] After cleaning, close the shut-off valve, open the drain valve, and start the water pump to recover the cleaning solution;

[0022] When the pressure inside the chamber exceeds the limit, the emergency vent will automatically open to release steam to a safe area.

[0023] After cleaning, activate the self-cleaning mode of the cabinet. The oil remover will remove the oil generated during self-cleaning, completing the cleaning process.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This invention adopts a multi-layer pin-type placement rack. Through the detachable combination of support legs, crossarms, and support pins, it achieves centralized and orderly three-dimensional placement of sucker rods. Compared with the traditional scattered placement method, it saves a lot of space. The crossarm can be installed layer by layer to adapt to the placement needs of different numbers of sucker rods, avoiding cleaning dead corners caused by sucker rod stacking. With the reciprocating spray of the long strip-type driveable nozzle, it can achieve full coverage and uniform cleaning of the sucker rod surface without the need for manual cleaning, significantly reducing labor input. It solves the problems of low efficiency and poor quality of traditional manual cleaning, and simultaneously improves cleaning efficiency and overall well workover quality.

[0026] 2. This invention forms a closed-loop circulation path through a return water collection tank, an oil stain remover, an electromagnetic heater, and a water pump, realizing the purification, heating, and recycling of the cleaning fluid. The oil stain remover, equipped with a drive motor, a fluid baffle plate, and a sludge scraper, can efficiently separate oil stains from the waste liquid. The electromagnetic heater specifically increases the return water temperature, eliminating the need for continuous addition of new steam or hot water, significantly reducing energy and water consumption. It solves the shortcomings of traditional steam flushing, which consumes a lot of water and energy and causes direct discharge of waste liquid, polluting the environment, and meets the needs of green production in oil fields.

[0027] 3. The sealing cover mechanism achieves box sealing through hinge devices and sealing gaskets, reducing cleaning medium leakage and heat loss. Two sets of switch-assisted mechanisms work together, driven by a servo motor-driven lead screw, with the support rod providing additional support, to achieve automatic and smooth opening and closing of the cover, reducing operational intensity. The emergency vent on the cover can automatically open when the pressure inside the box exceeds the standard, collecting the steam and leading it to a safe area outside the well site for discharge, avoiding damage to the box due to pressure or causing safety accidents, and comprehensively improving the stability and safety of the equipment operation. Attached Figure Description

[0028] Figure 1 This is the front view of the present invention;

[0029] Figure 2 This is a side view of the present invention;

[0030] Figure 3 This is a schematic diagram of the pin-type display rack of the present invention;

[0031] Figure 4 This is a schematic diagram of the wastewater treatment mechanism of the present invention;

[0032] Figure 5 This is a schematic diagram of the injection mechanism of the present invention;

[0033] Figure 6 This is a schematic diagram of the sealing and closing mechanism of the present invention.

[0034] The components include: 1. Sucker rod collection box; 2. Support leg; 3. Crossbeam; 4. Support pin; 5. Return water collection tank; 6. Pin-type placement rack; 7. Electromagnetic heater; 8. Fluid baffle plate; 9. Sludge scraper; 10. Drive motor; 11. Water pump; 12. Piping; 13. Check valve; 14. Steam injection port; 15. Shut-off valve; 16. Discharge valve; 17. Driveable nozzle; 18. Lead screw; 19. Drive motor; 20. Foldable metal bellows; 21. Cover; 22. Hinge device; 23. Sealing gasket; 24. Cover opening push rod; 25. Servo motor; 26. Threaded traveling dish; 27. Lead screw; 28. Support rod. Detailed Implementation

[0035] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0036] Example 1

[0037] according to Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, this embodiment proposes a sucker rod dirt removal device, including a main support mechanism, a circulating cleaning mechanism, a spraying mechanism, a sealing cover mechanism, and a sewage treatment mechanism. The main support mechanism includes a sucker rod collection box 1 and a built-in pin-type placement rack 6. The pin-type placement rack 6 is composed of a support leg 2, a crossbeam 3, and a support pin 4. The support leg 2 is fixed to the bottom of the sucker rod collection box 1. The crossbeam 3 is detachably connected to the support leg 2 through the support pin 4. Several pin-type placement racks 6 are arranged in an orderly manner at different heights to form a multi-layer three-dimensional placement layer.

[0038] The wastewater treatment mechanism is located at the bottom of the sucker rod collection box 1 and is connected to the circulating cleaning mechanism for purifying and heating the waste liquid; the spraying mechanism is installed on the inner wall of the sucker rod collection box 1 and is connected to the circulating cleaning mechanism for spraying cleaning medium into the box; the sealing cover mechanism covers the top of the sucker rod collection box 1 to achieve sealing and opening / closing of the box.

[0039] The pin-type placement rack 6 forms a placement layer with the left and right sides at the same height, with a total of four layers. Each layer maintains a preset layer spacing. The crossbeam 3 has a pin-type structure and is used for layer-by-layer installation to adapt to the placement requirements of the sucker rod. The wastewater treatment mechanism includes a return water collection tank 5, an oil sludge remover, and an electromagnetic heater 7. The return water collection tank 5 is internally connected to the sucker rod collection box 1. The oil sludge remover and electromagnetic heater 7 are both located inside the return water collection tank 5. The oil sludge remover includes a drive motor 10, a fluid baffle plate 8, and a sludge scraper 9. The drive motor 10 drives the sludge scraper 9 to move. The return water collection tank 5 has an oil collection port at the rear end, a liquid inlet at the top, and a water outlet on the right side. The fluid baffle plate 8 is used to regulate the flow path of the waste liquid. The circulating cleaning mechanism includes a water pump 11, a pipeline 12, a one-way valve 13, and a steam injection port 14. The water pump 11 is connected to the return water collection tank 5 through the pipeline 12. The pipeline 12 extends to the inner wall of the sucker rod collection box 1 and connects to the spraying mechanism. The one-way valve 13 and the steam injection port 14 are located on the pipeline 12 at the outlet side of the water pump 11. The pipeline 12 is also equipped with a shut-off valve 15 and a discharge valve 16. The spraying mechanism includes a driveable nozzle 17, a lead screw 18, a drive motor 19, and a foldable metal bellows 20. The driveable nozzle 17 has a long strip structure and is connected to the pipeline 12 through the foldable metal bellows 20. The drive motor 19 drives the lead screw 18 to rotate, causing the driveable nozzle 17 to reciprocate along the lead screw 18. The spraying time is controlled by a preset program through a controller. The sealing and closing mechanism includes a flip-up lid 21, a hinge device 22, a sealing gasket 23, and two sets of switching assist mechanisms. The hinge device 22 enables the lid 21 to hinge with the sucker rod collection box 1. The sealing gasket 23 is located on the contact surface between the lid 21 and the sucker rod collection box 1. The two sets of switching assist mechanisms are respectively installed at the front and rear ends of the sucker rod collection box 1, and work together to drive the lid 21 to open and close. The switching assist mechanism includes a lid-opening push rod 24, a servo motor 25, a threaded travel dish 26, a lead screw 27, and a support rod 28. The drive motor 25 drives the lead screw 27 to move the threaded travel dish 26. The threaded travel dish 26 is hinged to the lid-opening push rod 24. The lid-opening push rod is hinged to the lid to push the lid 21 to flip. There is a fixing block on one side of each end of the sucker rod collection box. The support rod is hinged to the fixing block, and the upper end of the support rod is hinged to the lid. The support rod 28 assists the lid 21 to move stably. The cover 21 is made of resin material and has built-in angle steel reinforcing ribs. The cover 21 is equipped with several emergency venting devices. When the steam pressure inside the sucker rod collection box 1 reaches a certain value, which is the safe pressure that the cover 21 can withstand, the emergency venting device will automatically open to release the internal steam. The released steam will be collected and discharged to a safe area outside the well site.

[0040] The first step is to arrange the sucker rods. The working principle involves using a layered, detachable, pin-type arrangement frame 6 to achieve a three-dimensional, orderly arrangement of the sucker rods, laying the foundation for uniform cleaning. During operation, the crossarm 3 is first installed on the lowest support leg 2 via support pins 4, forming the first layer. Sucker rods are then placed one by one on the crossarm 3 of this layer. Once full, another layer of crossarm 3 is installed via support pins 4, forming the second layer, and so on, until all four layers are filled or the sucker rods are arranged to the corresponding number of layers. After placement, the sealing and closing mechanism is activated.

[0041] The sealing and closing mechanism works by using two sets of assisted mechanisms to achieve the sealing and opening / closing of the cover 21, ensuring the airtightness of the box and ease of operation. The controller activates the servo motors 25 of the two sets of assisted mechanisms. The servo motors 25 drive the lead screw 27 to rotate, which in turn moves the threaded travel dish 26 horizontally. The threaded travel dish 26 is hinged to the cover opening push rod 24, pushing the cover opening push rod 24 to move, thereby causing the cover 21 to rotate around the axis of the hinge device 22. Fixed blocks are provided on one side of both ends of the sucker rod collection box 1. The support rod 28 is hinged to the fixed blocks, and its upper end is hinged to the cover 21. It rotates synchronously with the cover 21 as it flips, assisting the cover 21 to move smoothly. The controller regulates the synchronous operation of the two mechanisms to ensure that the cover 21 is subjected to uniform force, and the sealing gasket 23 tightly adheres to the contact surface to achieve a seal, preventing leakage of the cleaning medium and heat loss.

[0042] The working principle of the cleaning preparation stage is to pre-add and preheat the cleaning medium to provide conditions for efficient cleaning. Steam, cold water, or hot water are added to the system through the steam injection port 14 on pipeline 12. At the same time, special cleaning aids can be added according to the severity of wax buildup on the sucker rod. The electromagnetic heater 7 in the return water collection tank 5 is started, and the controller sets the target temperature. The electromagnetic heater 7 heats the medium in the tank, and the water pump 11 is started at the same time to allow the medium to circulate initially between pipeline 12 and return water collection tank 5, ensuring that the medium temperature rises evenly to the preset value. The one-way valve 13 can effectively prevent the medium from flowing back and ensure stable system pressure.

[0043] The working principle of the spray cleaning stage is to achieve uniform spraying of the cleaning medium and intensive cleaning of key areas through reciprocating long strip nozzles. The water pump 11 pressurizes the heated cleaning medium and delivers it through the pipeline 12 to the foldable metal bellows 20, and then introduces it into the driveable nozzle 17. The long strip driveable nozzle 17 sprays the medium evenly from top to bottom onto the surface of each layer of sucker rod in a waterfall shape. At the same time, the drive motor 19 drives the lead screw 18 to rotate, causing the driveable nozzle 17 to reciprocate along the lead screw 18. The controller has a preset action program. At the two ends of the sucker rod where wax is easy to accumulate or where the wax accumulation is large, the controller controls the nozzle to pause or slow down the movement speed, prolonging the spraying time to ensure that the wax layer is completely removed. The foldable metal bellows 20 can flexibly adapt to the reciprocating movement of the nozzle to avoid damage to the pipeline due to pulling.

[0044] The working principle of the waste liquid recycling treatment stage is to achieve the purification, recovery, and reuse of the cleaning fluid, thereby reducing energy consumption and pollution. The waste liquid after cleaning, carrying oil, flows into the bottom of the sucker rod collection tank 1 and enters the return water collection tank 5 through the inlet. The fluid baffle 8 regulates the flow path of the waste liquid and prevents the oil from floating and spreading. The drive motor 10 is started, which drives the oil scraper 9 to move, scraping the oil floating on the surface of the waste liquid to the oil collection port at the rear end of the return water collection tank 5. At the same time, the oil remover deeply removes the residual oil in the waste liquid, ensuring the purification effect of the waste liquid. The electromagnetic heater 7 continuously maintains the temperature of the waste liquid, and the water pump 11 pressurizes the purified and heated waste liquid again and delivers it to the spraying mechanism to form a closed loop circulation until the sucker rod is cleaned to the standard.

[0045] The working principle of the cleaning and safety protection phase is to recover the cleaning fluid and ensure operational safety. After cleaning, the shut-off valve 15 is closed, the drain valve 16 is opened, and the water pump 11 is started to recover the cleaning fluid in the system to a designated container for subsequent reuse. If the pressure inside the tank increases due to steam injection or heating during the cleaning process, when the pressure exceeds the safe pressure threshold that the cover 21 can withstand, the emergency vent on the cover 21 will automatically open to release excess steam. The released steam is led to a safe area outside the well site through the collection pipeline to avoid damage to the tank or causing a safety accident due to excessive pressure. Finally, the tank self-cleaning mode is activated, and the oil remover removes the oil generated during the self-cleaning process. After self-cleaning is completed, the cover 21 is opened through the switch-assisted mechanism, and the crossarm 3 of the pin-type placement frame 6 is disassembled layer by layer to remove the cleaned sucker rod, completing the entire cleaning process.

[0046] Example 2

[0047] according to Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, this embodiment proposes a method for removing dirt from sucker rods, including the following steps:

[0048] Install the crossbeams 3 of the pin-type placement rack 6 layer by layer, starting from the lowest layer to place the sucker rods. After each layer is filled, install the next layer of crossbeams 3 and continue placing until all the sucker rods are placed.

[0049] The lid 21 is closed by the sealing mechanism to ensure the box is sealed;

[0050] Steam, cold water, or hot water is added through steam injection port 14, a special cleaning agent is added, the electromagnetic heater 7 is started to heat the return water to the preset temperature, and the water pump 11 is started to pressurize the rinsing medium and deliver it to the spraying mechanism.

[0051] The driveable nozzle 17 of the spraying mechanism sprays the cleaning medium in a waterfall shape, and reciprocates under the drive of the screw 18, extending the spraying time of the waxed parts at both ends of the sucker rod according to the preset program of the controller.

[0052] The rinsing waste liquid flows into the return water collection tank 5, the oil remover removes the oil from the waste liquid, the electromagnetic heater 7 maintains the temperature of the waste liquid, and the water pump 11 circulates the purified and heated waste liquid to the spraying mechanism to achieve circulatory cleaning.

[0053] After cleaning, close the shut-off valve 15, open the drain valve 16, and start the water pump 11 to recover the cleaning solution.

[0054] When the pressure inside the chamber exceeds the limit, the emergency vent will automatically open to release steam to a safe area.

[0055] After cleaning, activate the self-cleaning mode of the cabinet. The oil remover will remove the oil generated during self-cleaning, completing the cleaning process.

[0056] This invention employs a multi-layer pin-type placement rack 6, which, through the detachable combination of support legs 2, crossbeams 3, and support pins 4, enables the centralized and orderly three-dimensional placement of sucker rods. Compared to the traditional dispersed placement method, this significantly saves space. The crossbeams 3 can be installed layer by layer to accommodate different numbers of sucker rods, avoiding cleaning dead spots caused by sucker rod stacking. Combined with the reciprocating spray of the long, driveable nozzle 17, it can achieve full coverage and uniform cleaning of the sucker rod surface without the need for manual assistance, significantly reducing manpower input and solving the problems of low efficiency and poor quality of traditional manual cleaning, while simultaneously improving cleaning efficiency and overall well workover quality. Furthermore, this invention forms a closed-loop circulation path through a return water collection tank 5, an oil stain remover, an electromagnetic heater 7, and a water pump 11, realizing the purification, heating, and recycling of the cleaning fluid. The oil stain remover, combined with a drive motor 10, a fluid baffle plate 8, and a sludge scraper 9, can efficiently separate oil stains from the waste liquid. The electromagnetic heater 7 specifically increases the return water temperature, eliminating the need for continuous addition of new steam or hot water, significantly reducing energy and water consumption. This solves the shortcomings of traditional steam flushing, which consumes water and energy and causes direct discharge of waste liquid, polluting the environment, and meets the needs of green production in oil fields. Meanwhile, the sealing cover mechanism achieves box sealing through hinge device 22 and sealing gasket 23, reducing cleaning medium leakage and heat loss. Two sets of switch-assisted mechanisms work together, driven by servo motor 25 to drive lead screw 27, and with the assistance of support rod 28, to achieve automatic and smooth opening and closing of cover 21, reducing operational intensity. The emergency vent on cover 21 can automatically open when the pressure inside the box exceeds the standard, collecting steam and leading it to a safe area outside the well site for discharge, avoiding damage to the box due to pressure or causing safety accidents, and comprehensively improving the stability and safety of the equipment operation.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for removing dirt from sucker rods, comprising a main supporting mechanism, a circulating cleaning mechanism, a spraying mechanism, a sealing and closing mechanism, and a wastewater treatment mechanism, characterized in that: The main supporting mechanism includes a sucker rod collection box (1) and a built-in pin-type display rack (6). The pin-type display rack (6) is composed of a support leg (2), a crossbeam (3) and a support pin (4). The support leg (2) is fixed to the bottom of the sucker rod collection box (1). The crossbeam (3) is detachably connected to the support leg (2) through the support pin (4). Several pin-type display racks (6) are arranged in an orderly manner according to height to form a multi-layer three-dimensional display layer. The wastewater treatment mechanism is located at the bottom of the sucker rod collection box (1) and is connected to the circulating cleaning mechanism for purifying and heating waste liquid; the spraying mechanism is installed on the inner wall of the sucker rod collection box (1) and is connected to the circulating cleaning mechanism for spraying cleaning medium into the box; the sealing cover mechanism covers the top of the sucker rod collection box (1) to achieve sealing and opening / closing of the box.

2. The sucker rod fouling removal device according to claim 1, characterized in that: The pin-type placement rack (6) is arranged in groups of four with the same height on the left and right sides. Each layer is separated by a preset spacing. The crossbeam (3) is a pin-type structure used for layer-by-layer installation to accommodate the placement requirements of the sucker rod.

3. The sucker rod fouling removal device according to claim 2, characterized in that: The wastewater treatment device includes a return water collection tank (5), an oil removal device, and an electromagnetic heater (7); the return water collection tank (5) is internally connected to the sucker rod collection box (1), and the oil removal device and the electromagnetic heater (7) are both located in the return water collection tank (5). The oil removal device includes a drive motor (10), a fluid baffle plate (8), and a sludge scraper (9). The drive motor (10) drives the sludge scraper (9) to move.

4. The sucker rod fouling removal device according to claim 3, characterized in that: The return water collection tank (5) has an oil inlet at the rear end, a liquid inlet at the top, and a water outlet on the right side. The fluid baffle (8) is used to regulate the flow path of the waste liquid.

5. The sucker rod fouling removal device according to claim 4, characterized in that: The circulating cleaning mechanism includes a water pump (11), a pipeline (12), a one-way valve (13), and a steam injection port (14). The water pump (11) is connected to the return water collection tank (5) through the pipeline (12). The pipeline (12) extends to the inner wall of the sucker rod collection box (1) and is connected to the injection mechanism. The one-way valve (13) and the steam injection port (14) are located on the pipeline (12) on the outlet side of the water pump (11). The pipeline (12) is also equipped with a shut-off valve (15) and a discharge valve (16).

6. The sucker rod fouling removal device according to claim 5, characterized in that: The spraying mechanism includes a driveable nozzle (17), a lead screw (18), a drive motor (19), and a foldable metal bellows (20). The driveable nozzle (17) has a long strip structure and is connected to the pipeline (12) through the foldable metal bellows (20). The drive motor (19) drives the lead screw (18) to rotate, causing the driveable nozzle (17) to reciprocate along the lead screw (18). The spraying time is controlled by a preset program of the controller.

7. The sucker rod fouling removal device according to claim 6, characterized in that: The sealing and closing mechanism includes an upturnable cover (21), a hinge device (22), a sealing gasket (23), and two sets of switch assist mechanisms; the hinge device (22) enables the cover (21) to be hinged to the sucker rod collection box (1), the sealing gasket (23) is located on the contact surface between the cover (21) and the sucker rod collection box (1), and the two sets of switch assist mechanisms are respectively installed at the front and rear ends of the sucker rod collection box (1) to drive the cover (21) to open and close in coordination.

8. The sucker rod fouling removal device according to claim 7, characterized in that: The switch assist mechanism includes a cover-opening push rod (24), a servo motor (25), a threaded walking dish (26), a lead screw (27), and a support rod (28). The drive motor (25) drives the lead screw (27) to move the threaded walking dish (26). The threaded walking dish (26) is hinged to the cover-opening push rod (24). The cover-opening push rod is hinged to the cover to push the cover (21) to flip. There are fixed blocks on one side of both ends of the oil sucker collection box. The support rod is hinged to the fixed blocks, and the upper end of the support rod is hinged to the cover. The support rod (28) assists the cover (21) to move stably.

9. The sucker rod fouling removal device according to claim 8, characterized in that: The cover (21) is made of resin material and has built-in angle steel reinforcing ribs. The cover (21) is equipped with several emergency venting devices. When the steam pressure inside the sucker rod collection box (1) reaches a certain value, and the cover (21) reaches the safe pressure it can withstand, the emergency venting device will automatically open to release the internal steam. The released steam will be collected and discharged to a safe area outside the well site.

10. A method for removing fouling from a sucker rod, using the sucker rod fouling removal device described in claim 8, characterized in that, Includes the following steps: Install the crossarms (3) of the pin-type placement rack (6) layer by layer, starting from the lowest layer to place the sucker rods. After filling one layer, install the next layer of crossarms (3) and continue placing until all sucker rods are placed. The lid (21) is closed by the sealing mechanism to ensure the box is sealed; Steam, cold water or hot water is added through the steam injection port (14), special cleaning aid is added, the electromagnetic heater (7) is started to heat the return water to the preset temperature, and the water pump (11) is started to pressurize the flushing medium and deliver it to the spraying mechanism. The driveable nozzle (17) of the spraying mechanism sprays the cleaning medium in a waterfall shape, and reciprocates under the drive of the screw (18), extending the spraying time of the waxed parts at both ends of the sucker rod according to the preset program of the controller. The rinsing waste liquid flows into the return water collection tank (5), the oil remover removes the oil in the waste liquid, the electromagnetic heater (7) maintains the temperature of the waste liquid, and the water pump (11) circulates the purified and heated waste liquid to the spraying mechanism to achieve circulatory cleaning. After cleaning, close the shut-off valve (15), open the drain valve (16), and start the water pump (11) to recover the cleaning solution; When the pressure inside the chamber exceeds the limit, the emergency vent will automatically open to release steam to a safe area. After cleaning, activate the self-cleaning mode of the cabinet. The oil remover will remove the oil generated during self-cleaning, completing the cleaning process.

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