Closed sucker rod paraffin scraping, cleaning and recycling integrated device

Abstract

The invention relates to the technical field of sucker rod wax scraping devices in the oil field well repair industry, in particular to a closed sucker rod wax scraping, cleaning and recycling integrated device. The device comprises a base, the upper end of the base is connected with a follow-up seat, the upper end of the follow-up seat is connected with an outer cylinder, the upper end of the outer cylinder is connected with an upper cover, a plurality of rolling wheel assemblies are installed in the outer cylinder, an upper guide disc is installed in the outer cylinder, a plurality of shifting piece assemblies are installed on the upper guide disc and connected with a paraffin scraping piece assembly, and the paraffin scraping piece assembly is connected with the upper cover. A plurality of stop bolts are installed on the upper guide disc, the upper cover is connected with a pressure-bearing disc, a plurality of stop columns are fixed to the pressure-bearing disc, and the top end of the pressure-bearing disc is connected with a gland and a sealing rubber plate. According to the closed sucker rod paraffin scraping, cleaning and recycling integrated device, operation is more convenient and faster, paraffin scraping, cleaning and recycling integrated operation is effectively achieved, and the hidden danger that pollution is likely to be caused due to the fact that sump oil falls to the ground is eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of wax scraping devices for sucker rods in the oilfield workover industry, and particularly to a closed integrated device for wax scraping, cleaning and recovery of sucker rods. Background Art

[0002] The pumping unit lift oil production is the most commonly used oil production method in oilfields. When a pumping unit well fails and a pump inspection operation is carried out, a lot of oil wax adheres to the surface of the lifted sucker rod. In order to avoid the occurrence of pump jamming, the oil wax on the surface of the sucker rod needs to be scraped clean before being lowered into the well again. At present, the sucker rod self-sealing rubber cylinder is mainly used for wax scraping on site. However, due to the large diameters of the sucker rod coupling and the sucker rod centralizer, the rubber cylinder is often damaged or scratched when passing through the sucker rod self-sealing rubber cylinder, resulting in a large amount of residual oil wax on the surface of the sucker rod. The wax scraping of the sucker rod fails to meet the downhole standard. When the residual oil wax on the surface of the sucker rod is re-cleaned with steam on the ground, the generated waste oil and waste water falling on the anti-seepage cloth are likely to cause problems such as leakage of waste oil and waste water and secondary pollution of the anti-seepage cloth by waste oil and waste water. Two problems have also been found in the use of the related devices in the prior art: one is that the adjusting bolts of the roller frame are exposed and are easily scratched and bent during handling or operation. When adjusting wax scraping blades of different models, the adjusting bolts cannot be screwed in or out, resulting in the problem that the model of the wax scraping blade cannot be adjusted; the other is that there is no positioning device when rotating the wax scraping blade, and the rotation angle of the wax scraping blade cannot be accurately controlled, so that the model adjustment of the wax scraping blade cannot be realized quickly, and there is a problem of time-consuming and laborious.

[0003] At present, the patent name of the existing patented technology is the wellhead oil pumping wax scraper, and the patent number is ZL201810477583.5. This wellhead sucker rod wax scraper can realize the on-line wax scraping of the sucker rod. The working principle is three wax scraping blades. The wax scraping blades with different diameters are matched with the sucker rod body with different outer diameters. Since the closing inner diameter is the same as the outer diameter of the sucker rod body, during the process of lifting out the sucker rod, the spring force is used to make the three wax scraping blades hold the sucker rod tightly and scrape the surface oil wax off. The scraped oil wax flows into the collection box below the wellhead, and then is recycled through the waste oil and sewage recycling device. However, there are the following two deficiencies in the process of wax scraping of the sucker rod and waste oil recycling: First, during the wax scraping process, the operation of replacing the wax scraping blade is relatively complicated. When replacing different wax scraping blades for different models of sucker rods, the pressure-bearing disc needs to be removed first, and then the spring and the original wax scraping blade of a certain model are removed, replaced with a wax scraping blade of another model, and then the removed components are installed in turn. The operation process of replacing the wax scraping blade is relatively complicated; Second, during the waste oil recycling process, it is easy to cause environmental pollution. Since the temperature in the north is relatively low in autumn, winter and spring, the wax scraping of the sucker rod is an open wax scraping. The scraped oil wax falls into the anti-seepage cloth cofferdam below the wellhead for collection. After the scraped oil wax falls to the ground, it is easy to solidify and needs to be melted again by steam before it can be recycled through the negative suction pump of the waste oil and sewage recycling device through the negative suction pipeline. And during the wax scraping process, due to the waste oil generated by wax scraping falling to the ground, the steam is easy to cause oil mist to disperse when melting the waste oil, and the anti-seepage cloth of the wellhead leaks or the cofferdam fails, etc., it is easy to cause environmental pollution. Therefore, in view of the above deficiencies, a closed-type integrated device for wax scraping, cleaning and recycling of sucker rods is proposed. Summary of the Invention

[0004] (I) Technical Problems to be Solved The present invention provides a closed-type integrated device for wax scraping, cleaning and recycling of sucker rods, which avoids the deficiencies that when wax scraping different models of sucker rods in the existing method, different models of wax scraping blades need to be replaced, the operation process of replacing the wax scraping blade is complicated, and the scraped oil wax needs to be melted again after solidifying on the ground before recycling, which is easy to cause environmental pollution.

[0005] (II) Technical Solutions To solve the above problems, the present invention provides a closed-type integrated device for wax scraping, cleaning and recycling of sucker rods, including: Base, the upper end of the base is connected to a follower seat, the upper end of the follower seat is connected to an outer cylinder, the upper end of the outer cylinder is connected to an upper cover, a plurality of roller assemblies are installed inside the outer cylinder, an upper guide plate is installed inside the outer cylinder, a plurality of flap assemblies are installed on the upper guide plate, the flap assemblies are connected to a wax scraping blade assembly, a plurality of stop bolts are installed on the upper guide plate, the upper cover is connected to a pressure-bearing plate through a plurality of second hexagon socket head cap screws, the pressure-bearing plate fixes a plurality of stop posts through a plurality of first cross recessed pan head screws, and the top end of the pressure-bearing plate is connected to a gland and a sealing rubber plate through a plurality of second cross recessed countersunk head screws; The number of the flap assemblies, the number of the wax scraping blade assemblies, the number of the roller assemblies, the number of the second hexagon socket head cap screws, the number of the first cross recessed pan head screws, the number of the stop bolts and the number of the stop posts are all adapted to each other, and the stop posts can control the moving position of the wax scraping blade assembly.

[0006] Preferably, the roller assembly includes a roller frame, the roller frame is provided with a semi-through hole, a pull pin is installed inside the semi-through hole, the lower end of the roller frame is connected to the follower seat, the roller frame fixes a roller shaft, a roller is sleeved outside the roller shaft, a snap ring is connected to the lower end of the roller shaft, a control bolt is welded to one side inside the roller frame, a spring is sleeved outside the control bolt, and a screw sleeve is connected to the other side of the control bolt.

[0007] Preferably, the follower seat includes a connecting sleeve, a central hole is provided in the center of the connecting sleeve, a base bottom plate is welded to the lower end of the connecting sleeve, a radial limiting disk is movably connected to the outside of the base bottom plate, the radial limiting disk is connected to the base through a plurality of first hexagon socket head cap screws, an upper guide plate is welded to the upper end of the connecting sleeve, the upper guide plate is movably connected to the radial limiting disk, the upper guide plate rotates 360 degrees in the connecting sleeve through the base bottom plate, a plurality of uniformly distributed grooves are provided on the upper guide plate, the roller frame is inside the grooves, and a plurality of bolt holes are provided on the upper guide plate.

[0008] Preferably, the base includes a fixed disk, the fixed disk is connected to the radial limiting disk, a steam pipeline joint is welded to one side of the fixed disk, a plurality of annular steam spray holes are provided inside the fixed disk, a lower joint is welded inside the fixed disk, a central hole is provided in the center of the lower joint, and a sewage pipe joint is connected to one side of the lower joint.

[0009] Preferably, the upper guide plate fixes the outer cylinder through an internal hexagonal socket set screw, an annular step is provided inside the outer cylinder, the lower end of the annular step is clamped to the upper guide plate, a plurality of interruptions are provided on the annular step, each interruption is provided with an interruption through hole, the interruption through holes are connected to the screw sleeves, and the number of the screw sleeves is adapted to the number of the interruption through holes.

[0010] Preferably, the threaded holes of the bolts are threadedly connected to double-headed bolts. The number of the double-headed bolts is adapted to the number of the bolt holes. The double-headed bolts are threadedly connected to the annular steps, the double-headed bolts are threadedly connected to the upper guide plate, the double-headed bolts are threadedly connected to the upper cover, the double-headed bolts pass through the upper cover, and the top ends of the double-headed bolts are connected to hexagonal nuts.

[0011] Preferably, a plurality of uniformly distributed long grooves are provided at the lower end of the upper guide plate. Roller assemblies are installed inside the long grooves. The upper guide plate is provided with a central through hole. A plurality of paddle guide grooves are uniformly distributed on the outer edge of the central through hole. The paddle guide grooves are connected to paddle assemblies. A plurality of uniformly distributed pin removal holes are provided on the upper guide plate. The pin removal holes are connected to the roller assemblies.

[0012] Preferably, the upper cover is provided with a central through hole. The upper cover is provided with a plurality of wax scraping guide grooves. The number of the wax scraping guide grooves is adapted to the number of the wax scraping blade assemblies. The upper cover is provided with a plurality of paddle shaft holes. The paddle shaft holes are connected to the paddle assemblies.

[0013] Preferably, the paddle assembly includes a lower paddle shaft. The lower end of the lower paddle shaft is connected to the upper guide plate. The upper end of the lower paddle shaft is connected to an upper paddle shaft. The upper paddle shaft is connected to the paddle shaft hole. The paddles are installed on the outer side of the upper paddle shaft.

[0014] Preferably, the wax scraping blade assembly includes wax scraping blades. The wax scraping blades are installed on the outer side of the wax scraping blade shaft. The wax scraping blades are movably connected to the paddles through the wax scraping blade shaft. The wax scraping blades are provided with a plurality of different types of scraping blades. The plurality of scraping blades form a complete circle by interlocking with each other. The top end of each scraping blade is provided with a scraping groove. The type of the scraping blade is adapted to the type of the sucker rod. The top end of the wax scraping blade shaft is a hexagonal prism. A wax scraping blade adjustment groove is provided on the hexagonal prism. The stop column includes a stop card slot. The stop card slot restricts the moving direction and moving distance of the wax scraping blade assembly by cooperating with the hexagonal prism.

[0015] (III) Beneficial effects The closed-type integrated device for scraping wax, cleaning and recycling sucker rods provided by the present invention is more convenient and fast to operate. The roller assembly and the wax scraping blade assembly are arranged in layers, effectively avoiding the interference problem during their operations. At the same time, the sucker rod body will not be damaged during wax scraping. After the sucker rod is scraped and cleaned once, it meets the downhole standard requirements, effectively realizing the integrated operation of wax scraping, cleaning and recycling, and eliminating the hidden danger of pollution easily caused by the falling of dirty oil to the ground. Description of the drawings

[0016] Figure 1 It is the main view sectional assembly drawing of the closed-type integrated device for scraping wax, cleaning and recycling sucker rods in the embodiment of the present invention; Figure 2 It is the top view assembly drawing of the closed-type integrated device for scraping wax, cleaning and recycling sucker rods in the embodiment of the present invention; Figure 3 This is the A-A sectional assembly drawing of the integrated device for wax scraping, cleaning and recovery of enclosed sucker rods in the embodiment of the present invention; Figure 4 This is the B-B sectional assembly drawing of the integrated device for wax scraping, cleaning and recovery of enclosed sucker rods in the embodiment of the present invention; Figure 5 This is the C-C sectional assembly drawing of the integrated device for wax scraping, cleaning and recovery of enclosed sucker rods in the embodiment of the present invention; Figure 6 This is the D-D sectional assembly drawing of the integrated device for wax scraping, cleaning and recovery of enclosed sucker rods in the embodiment of the present invention; Figure 7 This is the structural schematic diagram of the base in the embodiment of the present invention; Figure 8 This is the structural schematic diagram of the follower seat in the embodiment of the present invention; Figure 9 This is the structural schematic diagram of the roller assembly in the embodiment of the present invention; Figure 10 This is the A-A sectional schematic diagram of the roller assembly in the embodiment of the present invention; Figure 11 This is the structural schematic diagram of the wax scraping blade assembly in the embodiment of the present invention; Figure 12 This is the A-A sectional schematic diagram of the wax scraping blade assembly in the embodiment of the present invention; Figure 13 This is the top view of the wax scraping blade assembly in the embodiment of the present invention; Figure 14 This is the structural schematic diagram of the stop column in the embodiment of the present invention.

[0017] Wherein: 1. Base; 2. Follower seat; 3. First inner hexagon bolt; 4. Stud bolt; 5. Outer cylinder; 6. Inner hexagon socket head cap screw; 7. Roller assembly; 8. Nut sleeve; 9. Upper guide plate; 10. Lower dial shaft; 11. Dial; 12. Upper dial shaft; 13. Wax scraping blade assembly; 14. Spacer sleeve; 15. Stop bolt; 16. Upper cover; 17. Flat washer; 18. Hexagon nut; 19. Pressure bearing plate; 20. Second inner hexagon bolt; 21. Stop column; 22. First cross recessed pan head screw; 23. Sealing rubber plate; 24. gland; 25. Second cross recessed countersunk head screw; 1-1 Fixed disk; 1-2. Lower joint; 1-3. Sewage pipe joint; 1-4. Steam pipeline joint; 2-1. Lower guide plate; 2-2. Radial limit disk; 2-3. Connecting sleeve; 2-4. Base bottom plate; 7-1. Roller frame; 7-2. Roller; 7-3. Roller shaft; 7-4. Circlip; 7-5. Dial pin; 7-6. Control bolt; 7-7. Spring; 13-1, wax scraping piece; 13-2, wax scraping piece shaft; 13-3, wax scraping piece adjustment groove; 13-4, scraping groove; 21-1, disassembly and assembly bolt hole; 21-2, locking bolt hole; 21-3, stop card slot. Embodiment

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it is necessary to understand that the orientation or positional relationship indicated by "upper", "lower", "inner", "outer", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. The purpose is only to facilitate the description of the present invention and simplify the description, rather than indicating or implying that the components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0020] As Figures 1 to 6 shown, the present invention provides a closed integrated device for wax scraping, cleaning and recovery of sucker rods, including: Base 1, the upper end of the base 1 is connected to the follower seat 2 through a plurality of first hexagon socket head cap screws 3, the upper end of the follower seat 2 is connected to the outer cylinder 5, the upper end of the outer cylinder 5 is connected to the upper cover 16, a plurality of roller assemblies 7 are installed inside the outer cylinder 5, an upper guide plate 9 is installed inside the outer cylinder 5, a plurality of paddle assemblies are installed on the upper guide plate 9, the paddle assemblies are connected to the wax scraping piece assembly 13, a plurality of stop bolts 15 are installed on the upper guide plate 9, a spacer 14 is installed on both sides of each stop bolt 15, a flat washer 17 is installed at the top of the upper cover 16, the inner side of the flat washer 17 is a pressure bearing plate 19, the upper cover 16 is connected to the pressure bearing plate 19 through a plurality of second hexagon socket head cap screws 20, the pressure bearing plate 19 fixes a plurality of stop posts 21 through a plurality of first cross recessed pan head screws 22, the top of the pressure bearing plate 19 is connected to the gland 24 and the sealing rubber plate 23 through a plurality of second cross recessed countersunk head screws 25, and the inner side of the gland 24 is the sealing rubber plate 23; The number of the paddle assemblies, the number of the wax scraping piece assemblies 13, the number of the roller assemblies 7, the number of the second hexagon socket head cap screws 20, the number of the first cross recessed pan head screws 22, the number of the stop bolts 15 and the number of the stop posts 21 are all adapted to each other, and the stop posts 21 can control the moving position of the wax scraping piece assembly 13.

[0021] In this integrated device, as Figure 9As shown, the roller assembly 7 includes a roller frame 7-1. The roller frame 7-1 is provided with a semi-through hole, and a pull pin 7-5 is installed inside the semi-through hole. The pull pin 7-5 is used for movably connecting a pull piece 11. The lower end of the roller frame 7-1 is connected to a follower seat 2. One side of the roller frame 7-1 is provided with a pair of fixed ears, and each fixed ear is provided with a shaft hole at its center. The fixed ear fixes a roller shaft 7-3 through the shaft hole. A roller 7-2 is sleeved outside the roller shaft 7-3. A snap ring 7-4 is connected to the lower end of the roller shaft 7-3. A control bolt 7-6 is welded to one side inside the roller frame 7-1. A spring 7-7 is sleeved outside the control bolt 7-6. One end of the spring 7-7 abuts against the intermittent part inside the outer cylinder 5. The other side of the control bolt 7-6 is connected to a screw sleeve 8. The number of screw sleeves 8 is adapted to the number of roller assemblies.

[0022] In practical applications, as Figure 8 shown, the follower seat 2 includes a connecting sleeve 2-3. The center of the connecting sleeve 2-3 is provided with a center hole. The lower end of the connecting sleeve 2-3 is welded to a base bottom plate 2-4. The outer side of the base bottom plate 2-4 is movably connected to a radial limiting disc 2-2. The radial limiting disc 2-2 is connected to the base 1 through a plurality of first inner hexagon bolts 3. The radial limiting disc 2-2 is provided with a plurality of follower seat screw holes. The upper end of the connecting sleeve 2-3 is welded to a lower guiding disc 2-1. The lower guiding disc 2-1 is movably connected to the radial limiting disc 2-2. The lower guiding disc 2-1 rotates 360 degrees inside the connecting sleeve 2-3 through the base bottom plate 2-4, so that the integrated device for scraping wax, cleaning and recycling of sealed sucker rods and the sucker rod always remain centered. The lower guiding disc 2-1 is provided with a plurality of evenly distributed grooves. The inside of the grooves is the roller frame 7-1. The intersection point of the groove center lines coincides with the center point of the center hole of the follower seat. The grooves are used to control the movement direction of the roller frame 7-1. The lower guiding disc 2-1 is provided with a plurality of bolt holes.

[0023] In this integrated device, as Figure 7As shown in the figure, the base 1 includes a fixed disk 1-1. The fixed disk 1-1 is connected to the radial limiting disk 2-2. There are multiple base screw holes on the fixed disk 1-1. The number of follower seat screw holes is adapted to the number of base screw holes. A steam pipeline joint 1-4 is welded on one side of the fixed disk 1-1. A lower joint 1-2 is welded inside the fixed disk 1-1. The bottom end of the lower joint 1-2 is a female thread. The lower joint 1-2 connects the lower wellhead Christmas tree through the female thread. There is a central hole in the center of the lower joint 1-2. A sewage pipe joint 1-3 is connected to one side of the lower joint 1-2 for connecting the negative suction pipeline of the oil and sewage recovery device. There is an annular cavity between the fixed disk 1-1 and the lower joint 1-2. Multiple steam spray holes are provided at the upper end inside the annular cavity. The steam spray holes are equidistant spray holes. The steam pipeline joint 1-4 has a cavity, and the cavity communicates with the annular cavity. Steam enters the annular cavity from the steam pipeline joint 1-4 through the cavity and then sprays out from the steam spray holes. The steam sprayed out through the annular transverse spray holes can clean the wax on the sucker rod and melt the wax scraped off by the wax scraping piece 13-1 into a liquid state, preparing for recovery to the oil and sewage recovery device through the negative suction pipeline.

[0024] In practical applications, the lower guide disk 2-1 fixes the outer cylinder 5 through the inner hexagon socket head cap screw 6. There is an annular step inside the outer cylinder 5. The lower end of the annular step is clamped with the lower guide disk 2-1. The annular step has multiple interruptions. The width of the interruption part is the same as the maximum width of the roller frame 7-1. Each interruption is provided with an interruption through hole. The interruption through hole is connected to the screw sleeve 8. A through female thread is arranged inside the screw sleeve 8. A nut is arranged outside the screw sleeve 8. The body of the screw sleeve 8 passes through the through hole and enters the inside of the outer cylinder 5. The nut is located outside the outer cylinder 5. The number of screw sleeves 8 is adapted to the number of through holes. The function of the screw sleeve 8 is to pull the roller frame 7-1 to the maximum position by rotation and compress the spring 7-7, reserving a certain rotation space for adjusting the wax scraping piece model.

[0025] In this integrated device, the bolt hole is threadedly connected to the double-headed bolt 4. The number of double-headed bolts 4 is adapted to the number of bolt holes. The double-headed bolt 4 is threadedly connected to the annular step, the double-headed bolt 4 is threadedly connected to the upper guide disk 9, the double-headed bolt 4 is threadedly connected to the upper cover 16. The double-headed bolt 4 passes through the upper cover 16. The top end of the double-headed bolt 4 is connected to the hexagon nut 18. The double-headed bolt 4 is fixed after being tightened by the hexagon nut 18.

[0026] It should be noted that there is a step in the middle and lower part of the double-headed bolt 4. After the lower part of the double-headed bolt 4 is fixed on the lower guide disk 2-1 through the thread, the step height of the double-headed bolt 4 is the same as the height of the annular step in the middle and lower part inside the outer cylinder 4.

[0027] In practical applications, the upper guide disc 9 is provided with a plurality of through holes, the number of the through holes being adapted to the number of the double-headed bolts 4. The upper guide disc 9 passes through the double-headed bolts 4 through the through holes, and the upper guide disc 9 is fixed and positioned by the lower-middle steps of the double-headed bolts 4 and the annular steps inside the outer cylinder 5. The lower end of the upper guide disc 9 is provided with a plurality of uniformly distributed long grooves, and the roller assembly 7 is installed inside the long grooves. The roller bracket 7-1 is installed inside the long grooves. The number of the long grooves is adapted to the number of the roller assemblies 7, and the long grooves are used to control the movement direction of the roller bracket 7-1. The upper guide disc 9 is provided with a central through hole, and a plurality of paddle guide grooves are uniformly distributed on the outer edge of the central through hole. The paddle guide grooves are connected to the paddle assembly, and the paddle guide grooves are connected to the paddles 11. The number of the paddle guide grooves is adapted to the number of the paddle assemblies. The upper guide disc 9 is provided with a plurality of uniformly distributed pin extraction holes, and the pin extraction holes are connected to the roller assembly 7. The pin extraction holes are connected to the pin extractors 7-5. The number of the pin extraction holes is adapted to the number of the roller assemblies 7. The upper guide disc 9 is provided with a plurality of stop screw holes, and the upper guide disc 9 is installed with stop bolts 15 through the stop screw holes. The number of the stop screw holes is adapted to the number of the stop bolts 15.

[0028] In this integrated device, the upper cover 16 is provided with a central through hole, and the upper cover 16 is provided with a plurality of through holes for double-headed bolts. The number of the through holes for double-headed bolts is adapted to the number of the double-headed bolts. The upper cover 16 is provided with a plurality of wax scraping guide grooves. The number of the wax scraping guide grooves is adapted to the number of the wax scraping blade assemblies 13. The upper cover 16 is provided with a plurality of paddle shaft holes, and the paddle shaft holes are connected to the paddle assembly. The number of the paddle shaft holes is adapted to the number of the paddle assemblies.

[0029] In practical applications, the paddle assembly includes a lower paddle shaft 10. The lower end of the lower paddle shaft 10 is connected to the upper guide disc 9, and the upper end of the lower paddle shaft 10 is connected to the upper paddle shaft 12. The upper paddle shaft 12 is connected to the paddle shaft hole. The paddle 11 is installed on the outer side of the upper paddle shaft 12. The paddle 11 is divided into an upper paddle and a lower paddle. Each of the upper and lower paddles at one end of the paddle has a concave groove. The wax scraping blade 13-1 is between the upper paddle and the lower paddle. The upper paddle and the lower paddle are movably connected to the wax scraping blade 13-1 through the wax scraping blade shaft 13-2.

[0030] In this integrated device, such as Figures 11 - 13As shown, the wax scraper assembly 13 includes a wax scraper 13-1, which is installed on the outside of the wax scraper shaft 13-2. There is a square through hole in the middle of the wax scraper 13-1, and the size of the square through hole is adapted to the size of the square edge of the middle and lower parts of the wax scraper shaft 13-2. The middle part of the wax scraper shaft 13-2 is a square edge, and the upper end of the wax scraper shaft 13-2 is a hexagonal prism, and the hexagonal prism is provided with a wax scraper adjustment groove 13-3. The wax scraper 13-1 is movably connected to the paddle 11 through the wax scraper shaft 13-2, and the wax scraper 13-1 is provided with a plurality of scrapers of different models. , multiple scrapers are engaged with each other to form a whole circle, and a scraping groove 13-4 is provided on the top of each scraper. The model of the scraper is adapted to the model of the sucker rod. In practical applications, different models of scrapers can effectively improve the switching efficiency of the scraper 13-1 model. The scraper 13-1 can be opened and closed. The scraper 13-1 is limited by the stop column 21. The stop column 21 cooperates with the hexagonal prism of the scraper shaft 13-2 to limit the moving direction and moving distance of the scraper assembly 13. The function of the square edge is to ensure that the three scrapers are returned to form a circular scraping hole.

[0031] It should be noted that the wax scraper 13-1 will not damage the sucker rod body when scraping wax. The wax scraper 13-1 is made of 40Cro material, has good wear resistance, strength and corrosion resistance, and has a hardness of 217HB. The hardness of the sucker rod is 224HB. The hardness of the wax scraper 13-1 is less than the hardness of the sucker rod body, and the gap between the wax scraper 13-1 and the sucker rod is 1-2mm, that is, there is a certain gap between the wax scraper 13-1 and the sucker rod. Therefore, the wax scraper 13-1 does not tightly hold the sucker rod for scraping wax during the wax scraping process. Therefore, the wax scraper 13-1 will not cause damage or harm to the sucker rod body during the wax scraping process.

[0032] In practical applications, such as Figure 14 As shown, the upper end of the stop column 21 is flush with the upper plane of the wax scraper 13-1, and the stop column 21 is limited on the pressure plate 19 through a T-shaped step. A disassembly bolt hole 21-1 is provided on the upper end of the stop column 21, and a horizontal locking bolt hole 21-2 is provided horizontally. The pressure plate 9 is provided with a plurality of horizontal through holes, and a first cross-slot pan head screw 22 passes through the horizontal through hole and the locking bolt hole 21-2. The first cross-slot pan head screw 22 fixes the stop column 21 through a threaded buckle, and the stop column 21 is provided with a stop slot 21-3, the lateral width of the stop slot 21-3 is adapted to the parallel distance of the upper hexagonal prism of the scraper shaft 13-2, the length of the stop slot 21-3 is greater than the distance that the scraper shaft 13-2 moves forward and backward, the hexagonal prism is located in the stop slot 21-3 of the stop column 21, and can drive the scraper 13-1 to move forward and backward in the stop slot 21-3, realize the opening and closing of the scraper 13-1, and realize the accurate limit of the scraper 13-1.

[0033] It should be noted that the specification of the first hexagon socket head bolt 3 is larger than that of the second hexagon socket head bolt 20, and the specification of the first cross recessed pan head screw 22 is smaller than that of the second cross recessed pan head screw 25.

[0034] In this integrated device, the roller rack 7-1 and the wax scraping blade 13-1 are arranged in layers, effectively avoiding the interference problem during their operations. There are steps on the inner side of the outer cylinder 5 and the stud bolt 4, and the steps of the two are flush. The upper guide plate 9 is circumferentially limited by the steps and the outer cylinder 5, so that there is a certain gap between the roller rack 7-1 and the upper guide plate 9. Since the roller rack 7-1 and the wax scraping blade 13-1 are arranged in layers, the roller rack 7-1 and the wax scraping blade 13-1 can cooperate with each other and there will be no interference, realizing the smooth wax scraping of the wax scraping blade 13-1. At the same time, the roller 7-2 moves smoothly to drive the wax scraping blade 13-1 to enable the sucker rod coupling and the centralizer to pass through the wax scraping blade 13-1 smoothly, thus ensuring the smooth progress of various connecting processes such as mechanical wax scraping, steam cleaning and negative suction recovery of the sucker rod.

[0035] In practical applications, through the pull pin 7-5, the roller rack 7-1, the wax scraping blade adjustment groove 13-3, the stop bolt 15 and the stop post 21, the rapid switching of the model of the wax scraping groove 13-4 is realized, ensuring the wax scraping efficiency and effect. At the same time, the effective cleaning of the oil and wax on the sucker rod is realized through the steam and the annular conical surface spray holes. The oil and wax scraped by the wax scraping blade 13-1 are melted into a liquid state by the steam, and then are recovered to the oil and sewage recovery device through the negative suction pump and the negative suction pipeline of the oil and sewage recovery device, realizing the integrated operation of sucker rod wax scraping, cleaning and recovery. The oil and sewage generated by sucker rod wax scraping and cleaning are directly recovered to the oil and sewage recovery device, thus eliminating the potential environmental pollution problem caused by the easy landing of the ground cleaning oil and sewage.

[0036] It should be noted that the height of this integrated device is reduced, which is more convenient for operation. Compared with the existing technology, the roller rack 7-1 of this integrated device changes from a vertical setting to a horizontal setting, greatly reducing the height of the device, which is more conducive to the operation of wellhead personnel and reduces the safety risk.

[0037] The closed-type integrated device for sucker rod wax scraping, cleaning and recovery provided by the present invention is more convenient and fast to operate. The roller assembly and the wax scraping blade assembly are arranged in layers, effectively avoiding the interference problem during their operations. At the same time, the wax scraping blade assembly will not damage the sucker rod body during wax scraping. After the sucker rod is wax scraped and cleaned once, it meets the downhole standard requirements, effectively realizing the integrated operation of wax scraping, cleaning and recovery, and eliminating the potential pollution hazard caused by the easy landing of the oil and sewage. The working principle of the application process of this closed-type integrated device for sucker rod wax scraping, cleaning and recovery is specifically described below: In this embodiment, the upper end of the base 1 is connected to the follower seat 2 by 12 first hexagon socket head cap screws 3. The upper end of the follower seat 2 is connected to the outer cylinder 5. The upper end of the outer cylinder 5 is connected to the upper cover 16. Three roller assemblies 7 are installed inside the outer cylinder 5. The upper guide plate 9 is installed inside the outer cylinder 5. Three paddle assemblies are installed on the upper guide plate 9. The paddle assemblies are connected to the wax scraping blade assembly 13. Three stop bolts 15 are installed on the upper guide plate 9. A spacer sleeve 14 is installed on both sides of each stop bolt 15. A flat washer 17 is installed at the top of the upper cover 16. The inner side of the flat washer 17 is the pressure-bearing plate 19. The upper cover 16 is connected to the pressure-bearing plate 19 by 3 second hexagon socket head cap screws 20. The pressure-bearing plate 19 fixes a plurality of stop posts 21 by 3 first cross recessed pan head screws 22. The top of the pressure-bearing plate 19 is connected to the gland 24 and the sealing rubber plate 23 by 6 second cross recessed countersunk head screws 25. The inner side of the gland 24 is the sealing rubber plate 23. Among them, 6 double-headed bolts 4 pass through the upper cover 16, the upper guide plate 9, the annular step of the outer cylinder 5 and the lower guide plate 2-1 of the follower seat 2 respectively.

[0038] In practical applications, 12 base screw holes are evenly distributed on the base. The follower seat 2 is provided with follower seat screw holes corresponding to the 12 base screw holes in the same size and position. The diameter specification of the first hexagon socket head cap screw 3 is M16×40. The specification of the hexagon socket set screw with cone point 6 is M12×20. Three pressure-bearing plate bolt holes are evenly distributed at 120 degrees on the circumference of the central hole of the pressure-bearing plate 19. The specification of the second hexagon socket head fixing bolt 20 is M16×45. The specification of the first cross recessed pan head screw 22 is M6×40. The specification of the second cross recessed countersunk head screw 25 is M8×20. The middle part of the sealing rubber plate 23 is cut in a cross shape, the outer edges are connected, and it is stacked in multiple layers, and the upper and lower openings are staggered from each other to ensure the sealing performance.

[0039] In practical applications, the roller assembly 7 includes a roller frame 7-1. Three grooves evenly distributed at 120 degrees are provided on the lower guide plate 2-1. Three long grooves evenly distributed at 120 degrees are provided at the lower end of the upper guide plate 9. Three pin holes evenly distributed at 120 degrees are provided on the upper guide plate 9. Three paddle guide grooves evenly distributed at 120 degrees are provided at the lower end of the upper guide plate 9. Three stop screw holes evenly distributed at 120 degrees are provided on the upper guide plate 9. The cross section of the roller frame 7-1 is a cross-shaped rectangle. The lower cuboid of the roller frame 7-1 is stuck in the groove of the lower guide plate 2-1 to enable the front and back directional movement of the roller frame 7-1 and control the opening and closing of the wax scraping blade 13-1. A pull pin 7-5 is installed inside the pin hole. Three interruptions are provided on the annular step of the outer cylinder 5. Each interruption is respectively installed with a roller assembly 7. Three screw sleeves 8 pass through the interruption through holes and enter the inside of the outer cylinder 5. The setting of the annular step enables a certain gap between the upper guide plate 9 and the roller frame 7-1, enabling the roller frame 7-1 to move freely in the grooves of the upper and lower guide plates, thereby controlling the opening and closing of the wax scraping blade 13-1 and enabling large-diameter tools such as sucker rod couplings and centralizers to pass through the wax scraping device smoothly.

[0040] It should be noted that the wax scraping blade assembly 13 includes a wax scraping blade 13-1. The wax scraping blade 13-1 is provided with three different types of scraping blades. The tops of the three types of scraping blades are all provided with wax scraping grooves 13-4. The three types of scraping blades respectively correspond to the outer diameters of the Φ25, Φ22, and Φ19 sucker rod bodies. The hexagonal prism of the wax scraping blade shaft 13-2 cooperates with the anti-rotation groove 21-3 of the anti-rotation column 21, which can realize the directional movement of the wax scraping blade 13-1, ensure that the wax scraping blade 13-1 moves back and forth in a certain direction, and ensure that it is a complete circle when combined together. The two ends of the wax scraping blade 13-1 are set as right-angled broken lines. When the wax scraping blades 13-1 are combined together, the right-angled broken lines are engaged with each other. Due to the front and back engagement of the wax scraping blades 13-1, when the wax scraping blades 13-1 are stressed during the wax scraping process, it can be ensured that each wax scraping blade 13-1 does not change its position and remains a complete circle, thus ensuring the wax scraping quality.

[0041] In this embodiment, the anti-rotation bolt 15 is fixed on the upper guide disk 9 through a screw hole. The upper end of the anti-rotation column 21 is flush with the upper plane of the wax scraping blade 13-1. The anti-rotation bolt 15 is used for quick positioning when switching the models of the wax scraping grooves 13-4. The middle position is the Φ22 model. When the wax scraping blade 13-1 is rotated to the right until it cannot be rotated, it is exactly rotated by 60 degrees. At this time, it is switched to the Φ19 model. If you want to switch to the Φ25 model, rotate it to the left until it cannot be rotated, which is exactly rotated by 120 degrees. The switching efficiency of the wax scraping blade 13-1 can be quickly realized.

[0042] In practical applications, the operation of replacing the model of the wax scraping blade of this integrated device is more convenient and fast, greatly improving the replacement efficiency of the wax scraping blade. Specifically, the wax scraping blade 13-1 is designed with three different models within the 180-degree circumference range of the horizontal plane. The middle model corresponds to the Φ22 sucker rod body model. The wax scraping blade shaft 13-2 is fixed and connected to the square hole of the wax scraping blade 13-1 through a square prism block. When the model needs to be replaced, rotate the screw sleeve clockwise to the maximum position, remove the first cross-recessed pan head screw 22, screw it into the disassembly and assembly bolt hole 21-1 on the upper part of the anti-rotation column 21, pull out the anti-rotation column 21, use a flat-tip screwdriver to rotate the wax scraping blade 13-1 shaft clockwise until it cannot be rotated, put in the anti-rotation column 21, remove the first cross-recessed pan head screw 22, and screw it into the locking bolt hole 21-2 of the anti-rotation column 21 to fix the anti-rotation column 21. Rotate the screw sleeve counterclockwise to the maximum position to quickly complete the model switching, so that the anti-rotation groove 21-3 below the anti-rotation column 21 is directionally positioned through the wax scraping blade adjustment groove 13-3 on the upper part of the wax scraping blade shaft 13-2. The time for replacing the wax scraping blade 13-1 is reduced from 21 minutes to within 1 minute, greatly improving the replacement efficiency of the sucker rod wax scraping blade.

[0043] In this embodiment, by applying this integrated device, it is possible to achieve the downhole standard requirements after the sucker rod is waxed and cleaned once. During the wax scraping process, there is a certain gap between the wax scraping blade 13-1 between the upper cover 16 and the upper guide disk 9, and the wax scraping blade 13-1 is always kept perpendicular to the sucker rod at 90 degrees. And the closing inner diameters of the three models are Φ21mm, Φ24mm, and Φ27mm respectively, corresponding to Φ19mm, Φ22mm, and Φ25mm respectively, that is, the gap between the wax scraping blade 13-1 and the sucker rod is 1-2mm, so as to ensure that the thickness of the oil and wax on the surface of the sucker rod is ≦2mm. When the sucker rod coupling or centralizer approaches the roller of the roller frame, the sucker rod coupling or centralizer squeezes the roller and the roller frame to compress the spring, so that the roller frame 7-1 drives the rotary wax scraping blade 13-1 through the roller shaft 7-3, causing the wax scraping blade 13-1 to open, enabling the sucker rod coupling and centralizer to pass through the wax scraping blade 13-1 smoothly. At the same time, the follower seat 2 has a following function, which can make the outer cylinder 5 move relative to the base 1, keeping the sucker rod centered at all times, further ensuring the wax scraping effect, and thus ensuring that the sucker rod is waxed once to meet the downhole standard requirement that the oil and wax on the surface of the sucker rod is ≤2mm.

[0044] In practical applications, the integrated operation of wax scraping, cleaning, and recovery eliminates the hidden danger of pollution easily caused by the landing of dirty oil. During the process of pulling out the sucker rod, the steam ejected from the steam spray holes inside the integrated device installed on the wellhead is used to clean the oil and wax on the surface of the sucker rod and preheat and soften the oil and wax. Then, the wax scraping blade 13-1 is pressed by the spring 7-7 to embrace the sucker rod and scrape the oil and wax on the surface of the sucker rod. The scraped oil and wax turn into liquid under the action of the steam in the closed shell. Finally, it is directly recovered to the dirty oil and sewage recovery device under the action of the negative suction pressure of 0-0.1MPa through the negative suction pipeline, realizing the integrated operation of wax scraping, cleaning, and recovery of the sucker rod, effectively avoiding the hidden danger of dirty oil and sewage landing easily caused by cleaning the sucker rod on the ground, and eliminating the problem of environmental pollution easily caused.

[0045] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those of ordinary skill in the relevant technical fields can also make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention shall be defined by the claims.

Claims

1. An integrated device for wax scraping, cleaning and recovery of enclosed sucker rods, characterized in that, Including: A base (1), the upper end of the base (1) is connected to a follower seat (2), the upper end of the follower seat (2) is connected to an outer cylinder (5), the upper end of the outer cylinder (5) is connected to an upper cover (16), a plurality of roller assemblies (7) are installed inside the outer cylinder (5), an upper guide plate (9) is installed inside the outer cylinder (5), a plurality of paddle assemblies are installed on the upper guide plate (9), the paddle assemblies are connected to a wax scraping blade assembly (13), a plurality of stop bolts (15) are installed on the upper guide plate (9), the upper cover (16) is connected to a pressure-bearing plate (19) through a plurality of second inner hexagon bolts (20), the pressure-bearing plate (19) fixes a plurality of stop columns (21) through a plurality of first cross recessed pan head screws (22), and the top end of the pressure-bearing plate (19) is connected to a gland (24) and a sealing rubber plate (23) through a plurality of second cross recessed countersunk head screws (25); The number of the paddle assemblies, the number of the wax scraping blade assembly (13), the number of the roller assemblies (7), the number of the second inner hexagon bolts (20), the number of the first cross recessed pan head screws (22), the number of the stop bolts (15) and the number of the stop columns (21) are all adapted to each other, and the stop columns (21) can control the moving position of the wax scraping blade assembly (13).

2. The integrated device for wax scraping, cleaning and recovery of enclosed sucker rods according to claim 1, characterized in that, The roller assembly (7) includes a roller frame (7-1), the roller frame (7-1) is provided with a semi-through hole, a pull pin (7-5) is installed inside the semi-through hole, the lower end of the roller frame (7-1) is connected to the follower seat (2), the roller frame (7-1) fixes a roller shaft (7-3), a roller (7-2) is sleeved outside the roller shaft (7-3), a snap ring (7-4) is connected to the lower end of the roller shaft (7-2), a control bolt (7-6) is welded on one side inside the roller frame (7-1), a spring (7-7) is sleeved outside the control bolt (7-6), and a screw sleeve (8) is connected to the other side of the control bolt (7-6).

3. The integrated device for wax scraping, cleaning and recovery of enclosed sucker rods according to claim 2, characterized in that, The follower seat (2) includes a connecting sleeve (2-3), a central hole is provided in the center of the connecting sleeve (2-3), a base bottom plate (2-4) is welded to the lower end of the connecting sleeve (2-3), a radial limiting disc (2-2) is movably connected to the outside of the base bottom plate (2-4), the radial limiting disc (2-2) is connected to the base (1) through a plurality of first inner hexagon bolts (3), a lower guide plate (2-1) is welded to the upper end of the connecting sleeve (2-3), the lower guide plate (2-1) is movably connected to the radial limiting disc (2-2), the lower guide plate (2-1) rotates 360 degrees in the connecting sleeve (2-3) through the base bottom plate (2-4), a plurality of uniformly distributed grooves are provided on the lower guide plate (2-1), the roller frame (7-1) is inside the grooves, and a plurality of bolt holes are provided on the lower guide plate (2-1).

4. The integrated device for wax scraping, cleaning and recovery of enclosed sucker rods according to claim 3, characterized in that, The base (1) includes a fixing plate (1-1). The fixing plate (1-1) is connected to a radial limiting plate (2-2). On one side of the fixing plate (1-1), a steam pipeline joint (1-4) is welded. Inside the fixing plate (1-1), there are multiple annular steam spray holes. Inside the fixing plate (1-1), a lower joint (1-2) is welded. A central hole is provided in the center of the lower joint (1-2). On one side of the lower joint (1-2), a sewage pipe joint (1-3) is connected.

5. The integrated device for wax scraping, cleaning and recovery of enclosed sucker rods according to claim 3, characterized in that, The lower guiding plate (2-1) fixes the outer cylinder (5) through an inner hexagon socket head cap screw (6). Inside the outer cylinder (5), there is an annular step. The lower end of the annular step is clamped with the lower guiding plate (2-1). The annular step has multiple interruptions, and each interruption is provided with an interruption through hole. The interruption through holes are connected to screw sleeves (8). The number of screw sleeves (8) is adapted to the number of interruption through holes.

6. The integrated device for wax scraping, cleaning and recovery of enclosed sucker rods according to claim 3, characterized in that, The bolt holes are threadedly connected to double-headed bolts (4). The number of double-headed bolts (4) is adapted to the number of bolt holes. The double-headed bolts (4) are threadedly connected to the annular step, the double-headed bolts (4) are threadedly connected to the upper guiding plate (9), the double-headed bolts (4) are threadedly connected to the upper cover (16). The double-headed bolts (4) pass through the upper cover (16), and the top ends of the double-headed bolts (4) are connected to hexagon nuts (18).

7. The integrated device for wax scraping, cleaning and recovery of enclosed sucker rods according to claim 6, characterized in that, At the lower end of the upper guiding plate (9), there are multiple evenly distributed long grooves. Inside the long grooves, roller assemblies (7) are installed. The upper guiding plate (9) is provided with a central through hole. On the outer edge of the central through hole, multiple paddle guiding grooves are evenly distributed. The paddle guiding grooves are connected to paddle assemblies. On the upper guiding plate (9), there are multiple evenly distributed pin pulling holes. The pin pulling holes are connected to the roller assemblies (7).

8. The integrated device for wax scraping, cleaning and recovery of enclosed sucker rods according to claim 6, characterized in that, The upper cover (16) is provided with a central through hole. The upper cover (16) is provided with multiple wax scraping guiding grooves. The wax scraping guiding grooves are connected to a wax scraping blade assembly (13). The upper cover (16) is provided with multiple paddle shaft holes. The paddle shaft holes are connected to the paddle assemblies.

9. The integrated device for wax scraping, cleaning and recovery of enclosed sucker rods according to claim 8, characterized in that, The paddle assembly includes a lower paddle shaft (10). The lower end of the lower paddle shaft (10) is connected to the upper guiding plate (9). The upper end of the lower paddle shaft (10) is connected to an upper paddle shaft (12). The upper paddle shaft (12) is connected to the paddle shaft hole. The paddle (11) is installed on the outside of the upper paddle shaft (12).

10. The integrated device for wax scraping, cleaning and recovery of enclosed sucker rods according to claim 9, characterized in that, The wax scraping blade assembly (13) includes a wax scraping blade (13-1). The wax scraping blade (13-1) is installed on the outer side of the wax scraping blade shaft (13-2). The wax scraping blade (13-1) is movably connected to a dial (11) through the wax scraping blade shaft (13-2). The wax scraping blade (13-1) is provided with a plurality of scraping blades of different models. The plurality of scraping blades form a complete circle by engaging with each other. The top of each scraping blade is provided with a scraping groove (13-4). The model of the scraping blade is adapted to the model of the sucker rod. The top of the wax scraping blade shaft (13-2) is a hexagonal prism, and a wax scraping blade adjustment groove (13-3) is provided on the hexagonal prism. The stop post (21) includes a stop card slot (21-3). The stop card slot restricts the moving direction and moving distance of the wax scraping blade assembly (13) by cooperating with the hexagonal prism.

Images