Sand prevention device for oil well

Abstract

The utility model provides a sand prevention device for an oil well, which belongs to the field of oil exploitation and comprises a well mouth, a filter pipe is arranged at the top of the well mouth, oil guide pipes are arranged on two sides of the filter pipe, a top plate is arranged above the well mouth, and the surface of the top end of the filter pipe is connected with the top plate through a connecting component. A timer on the surface of the energy storage box is matched with a control panel to control a motor, the motor drives a driving gear to rotate, the driving gear is matched with a plurality of teeth to drive a driven ring to rotate, and the driven ring drives a first rotating ring and a second rotating ring to rotate on the inner walls of a first rotating groove and a second rotating groove respectively, so that rotation of the first rotating ring and the second rotating ring is limited conveniently; a driven ring drives two strip-shaped scraping plates on the inner wall to rotate on the inner wall of the filter pipe, and impurities on the inner wall and the surfaces of two third filter screens are scraped, so that the cleaning effect of the device is improved, and the interior of the filter structure is prevented from being blocked.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction, specifically to an oil well sand control device. Background Technology

[0002] Sand production is a common problem in oil wells, especially in the later stages of oilfield development. To remove sand and gravel from the oil reservoir, a sand control and removal device needs to be installed at the wellhead. A search of patent application CN201821473265.3 reveals a sand control device for an oil wellhead, which includes a wellhead and a sliding groove. A connecting plate is embedded at the upper end of the wellhead, and a top plate is connected inside the connecting plate. The top plate and the connecting plate are connected by screws. A through groove is provided in the middle of the inner side of the top plate, and pre-drilled holes are installed on both sides of the inner side of the top plate. A first filter screen is installed at the lower end of the top plate, and brushes are fixed to both sides of the first filter screen. The lower end of the top plate is inlaid with… The wellhead features an embedded filter pipe with second filter screens connected to the inner walls on both sides. The filter pipe is welded to the top plate. The wellhead sand control device has pre-drilled holes on both sides of the top plate, allowing screws from the connecting plate at the top of the wellhead to be inserted into the top plate, thus fixing the sand control device inside the wellhead and ensuring its stability when subjected to oil impacts. However, the above description has the following drawbacks in actual use: the sand control device is inconvenient to install and disassemble, and its cleaning effect on the inner wall of the pipe is insufficient, easily causing blockage of the internal filter structure. Therefore, a more practical oil well sand control device needs to be designed. Utility Model Content

[0003] The purpose of this utility model is to provide an oil well sand control device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an oil well sand control device, including a wellhead, a filter pipe at the top of the wellhead, oil guide pipes on both sides of the filter pipe, a top plate above the wellhead, and the surface of the top of the filter pipe being connected to the top plate via a connecting component.

[0005] A connecting assembly includes a connecting ring mounted on the top surface of a filter tube. The connecting ring has first slots on both sides of its top edge. Two arc-shaped connecting plates engage at opposite edges between the two connecting rings. Each of the two arc-shaped connecting plates has a first locking block at its bottom. The inner walls of the two first slots engage with the surfaces of the two first locking blocks. Each of the two arc-shaped connecting plates has a second locking block at its top. The surfaces of the two second locking blocks engage with the second slots on both sides of the bottom edge of the mounting ring. The top of the mounting ring is mounted to the bottom of a top plate. The bottom edge of the inner wall of the mounting ring has a first rotating groove. The inner wall of the first rotating groove is rotatably connected to the second rotating groove on the top of the filter tube via a cleaning assembly.

[0006] The cleaning assembly includes a first rotating ring installed on the inner wall of a first rotating groove. The bottom of the first rotating ring is fixedly connected to the top of a driven ring. A second rotating ring is provided at the bottom of the driven ring, and the bottom of the second rotating ring is rotatably connected to the inner wall of the second rotating groove. A plurality of toothed grooves are provided on the side of the driven ring, and the inner walls of the plurality of toothed grooves are meshed with a plurality of teeth on the side of a drive gear. The bottom of the drive gear is fixedly connected to the output shaft of a motor. The bottom of the motor is installed and connected to the top of a connecting ring. Strip scrapers are provided on both sides of the inner wall of the driven ring, and the surfaces of the two strip scrapers are rotatably connected to the inner wall of the filter tube.

[0007] As a preferred embodiment of this utility model: an annular groove is provided on the top edge of the inner wall of the mounting ring, and the inner wall of the annular groove is engaged with a snap-fit ​​ring provided on the top edge of the first filter screen, and the side of the first filter screen is rotatably connected to the inner wall of the driven ring.

[0008] As a preferred embodiment of this utility model: the surfaces of the two first mounting blocks and the two second mounting blocks are respectively provided with two first mounting holes and two second mounting holes. The inner walls of the two first mounting holes are engaged with the first slots provided on the inner walls of the two first slots by two first mounting pins. The inner walls of the two second mounting holes are engaged with the second slots provided on the inner walls of the two second slots by two second mounting pins.

[0009] As a preferred embodiment of this utility model: a second filter screen is provided at the connection between the inner wall of the wellhead and the filter pipe, and the two sides of the top of the second filter screen are fixedly connected to the two sides of the bottom of the first filter screen by two connecting rods.

[0010] As a preferred embodiment of this utility model, two third filter screens are engaged and connected at the connection between the inner wall of the filter tube and the two oil guide tubes.

[0011] As a preferred embodiment of this utility model: both sides of the top of the mounting ring are provided with mating holes, and the inner walls of the two mating holes are threadedly connected to the insertion holes on both sides of the top of the top plate by two connecting bolts. An oil outlet is provided in the middle of the top of the top plate.

[0012] As a preferred embodiment of this utility model: an energy storage box is provided on one side of the top of the connecting ring, and a timer and a control panel are respectively provided on the surface of the energy storage box.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) By engaging the two first and second blocks on the two arc-shaped connecting plates with the inner walls of the two first and second slots respectively, the two arc-shaped connecting plates are initially fixed to the connecting ring and the mounting ring. The two first mounting pins and the second mounting pins are inserted into the two first mounting holes, the first slot, the second mounting hole and the second slot, thereby limiting and fixing the connecting ring, the mounting ring and the filter tube, so as to facilitate the installation and disassembly of its own structure and the cleaning structure at the connection.

[0015] (2) The motor is controlled by the timer on the surface of the energy storage box in conjunction with the control panel. The motor drives the drive gear to rotate. The drive gear, in conjunction with several teeth, drives the driven ring to rotate. The driven ring drives the first rotating ring and the second rotating ring to rotate on the inner wall of the first rotating groove and the second rotating groove respectively, so as to facilitate the limiting of their rotation. The driven ring drives the two strip scrapers on the inner wall to rotate on the inner wall of the filter tube, scraping off the impurities on the inner wall and the surface of the two third filter screens, thereby improving the cleaning effect of the device and avoiding blockage inside the filter structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is one of the structural schematic diagrams of this utility model;

[0018] Figure 3 This is a partial structural schematic diagram of the present invention;

[0019] Figure 4 This is a schematic diagram of the connection component structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the mounting ring structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the cleaning component structure of this utility model.

[0022] In the diagram: 1. Wellhead; 11. Filter pipe; 12. Oil guide pipe; 13. Top plate; 14. Second rotary groove; 15. First filter screen; 16. Snap-fit ​​ring; 17. Second filter screen; 18. Connecting rod; 19. Third filter screen; 110. Connecting bolt; 111. Insertion hole; 112. Oil outlet; 113. Energy storage box; 114. Timer; 115. Control panel; 2. Connecting assembly; 21. Connecting ring; 22. First slot; 23. Arc-shaped connecting plate; 24. First locking block; 25. 26. Second locking block; 27. Mounting ring; 28. Second locking groove; 29. ​​First rotating groove; 20. Annular groove; 210. First mounting hole; 211. Second mounting hole; 212. First mounting pin; 213. First hole groove; 214. Second mounting pin; 215. Second hole groove; 216. Connecting hole; 3. Cleaning assembly; 31. First rotating ring; 32. Driven ring; 33. Second rotating ring; 34. Gear groove; 35. Drive gear; 36. Tooth; 37. Motor; 38. Strip scraper. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Please see Figures 1-6 An oil well sand control device includes a wellhead 1, a filter pipe 11 at the top of the wellhead 1, oil guide pipes 12 on both sides of the filter pipe 11, a top plate 13 above the wellhead 1, and the surface of the top end of the filter pipe 11 is connected to the top plate 13 by a connecting component 2.

[0025] Please see Figure 4 , Figure 5The connecting component 2 includes a connecting ring 21 installed on the top surface of the filter tube 11. First slots 22 are provided on both sides of the top of the connecting ring 21. Two arc-shaped connecting plates 23 engage at opposite edges between the two connecting rings 21. First blocks 24 are provided at the bottom of each of the two arc-shaped connecting plates 23. The inner walls of the two first slots 22 engage with the surfaces of the two first blocks 24. The inner walls of the two first slots 22 also engage with the first blocks 24 at the bottom of each of the two arc-shaped connecting plates 23. Second blocks 25 are provided at the top of each of the two arc-shaped connecting plates 23. The surfaces of the two second blocks 25 engage with the second slots 27 provided on both sides of the bottom of the mounting ring 26. The top of the mounting ring 26 is installed and connected to the bottom of the top plate 13. A first rotating groove 28 is provided on the bottom edge of the inner wall of the mounting ring 26. The inner wall of the first rotating groove 28 is rotatably connected to the second rotating groove 14 at the top of the filter tube 11 via the cleaning component 3.

[0026] In practical use: the two first locking blocks 24 and the second locking blocks 25 on the two arc-shaped connecting plates 23 are respectively engaged with the inner walls of the two first locking slots 22 and the second locking slots 27, thereby initially fixing the two arc-shaped connecting plates 23 with the connecting ring 21 and the mounting ring 26. The two first mounting pins 212 and the second mounting pins 214 are inserted into the two first mounting holes 210, the first slot 213, the second mounting hole 211 and the second slot 215, thereby limiting and fixing the connecting ring 21, the mounting ring 26 and the filter tube 11, which facilitates the installation and disassembly of their own structure and the cleaning structure at the connection.

[0027] Please see Figure 6 The cleaning component 3 includes a first rotating ring 31 installed on the inner wall of the first rotating groove 28. The bottom of the first rotating ring 31 is fixedly connected to the top of the driven ring 32. The bottom of the driven ring 32 is provided with a second rotating ring 33, and the bottom of the second rotating ring 33 is rotatably connected to the inner wall of the second rotating groove 14. Several toothed grooves 34 are opened on the side of the driven ring 32. The inner wall of the several toothed grooves 34 is meshed with several teeth 36 on the side of the drive gear 35. The bottom of the drive gear 35 is fixedly connected to the output shaft of the motor 37. The bottom of the motor 37 is installed and connected to the top of the connecting ring 21. Both sides of the inner wall of the driven ring 32 are provided with strip scrapers 38, and the surfaces of the two strip scrapers 38 are rotatably connected to the inner wall of the filter tube 11.

[0028] In practical use: the timer 114 on the surface of the energy storage box 113, together with the control panel 115, controls the motor 37. The motor 37 drives the drive gear 35 to rotate. The drive gear 35, together with several teeth 36, drives the driven ring 32 to rotate. The driven ring 32 drives the first rotating ring 31 and the second rotating ring 33 to rotate on the inner walls of the first rotating groove 28 and the second rotating groove 14 respectively, so as to facilitate the limiting of their rotation. The driven ring 32 drives the two strip scrapers 38 on the inner wall to rotate on the inner wall of the filter tube 11, scraping away impurities on the inner wall and the surface of the two third filter screens 19, improving the cleaning effect of the device and avoiding blockage inside the filter structure.

[0029] Please see Figure 4 An annular groove 29 is provided on the top edge of the inner wall of the mounting ring 26. The inner wall of the annular groove 29 is engaged with the snap ring 16 provided on the top edge of the first filter screen 15. The side of the first filter screen 15 is rotatably connected to the inner wall of the driven ring 32.

[0030] In practical use: the snap ring 16 is engaged with the inner wall of the annular groove 29, thereby engaging and fixing the first filter screen 15 with the mounting ring 26.

[0031] Please see Figure 4 The surfaces of the two first mounting blocks 24 and the second mounting block 25 are respectively provided with two first mounting holes 210 and two mounting holes 211. The inner walls of the two first mounting holes 210 are engaged with the first slots 213 provided on the inner walls of the two first mounting slots 22 by two first mounting pins 212. The inner walls of the two second mounting holes 211 are engaged with the second slots 215 provided on the inner walls of the two second mounting slots 27 by two second mounting pins 214.

[0032] In practical use: insert the two first mounting pins 212 and the second mounting pin 214 into the two first mounting holes 210, the first slot 213, the second mounting hole 211 and the second slot 215, thereby limiting and fixing the connecting ring 21, the mounting ring 26 and the filter tube 11, so as to facilitate the installation and disassembly of its own structure and the cleaning structure at the connection.

[0033] Please see Figure 2 , Figure 6 A second filter screen 17 is provided at the connection between the inner wall of the wellhead 1 and the filter pipe 11. The top two sides of the second filter screen 17 are fixedly connected to the bottom two sides of the first filter screen 15 by two connecting rods 18.

[0034] In practical use: the first filter screen 15 works with two connecting rods 18 to facilitate the installation and removal of the second filter screen 17.

[0035] Please see Figure 2Two third filter screens 19 are engaged at the connection between the inner wall of the filter pipe 11 and the two oil guide pipes 12.

[0036] In practical use: the two third filter screens 19 at the connection between the inner wall of the filter pipe 11 and the two oil guide pipes 12 facilitate the filtration and export of oil.

[0037] Please see Figure 3 The mounting ring 26 has two mating holes 216 on both sides of its top. The inner walls of the two mating holes 216 are threadedly connected to the insertion holes 111 on both sides of the top of the top plate 13 by two connecting bolts 110. An oil outlet 112 is provided in the middle of the top of the top plate 13.

[0038] In practical use: Insert the two connecting bolts 110 into the two insertion holes 111 and the mating hole 216 to install and fix the mounting ring 26 to the top plate 13.

[0039] Please see Figure 1 An energy storage box 113 is provided on one side of the top of the connecting ring 21. A timer 114 and a control panel 115 are respectively provided on the surface of the energy storage box 113.

[0040] In practical use: the timer 114 on the surface of the energy storage box 113, together with the control panel 115, controls the motor 37, thereby facilitating the periodic cleaning of the inner wall of the filter tube 11.

[0041] In use, the two first locking blocks 24 and the second locking blocks 25 on the two arc-shaped connecting plates 23 are respectively engaged with the inner walls of the two first locking slots 22 and the second locking slots 27, thus initially fixing the two arc-shaped connecting plates 23 with the connecting ring 21 and the mounting ring 26. The two first mounting pins 212 and the second mounting pins 214 are inserted into the two first mounting holes 210, the first slot 213, the second mounting hole 211, and the second slot 215, thus limiting and fixing the connecting ring 21, the mounting ring 26, and the filter tube 11, facilitating the installation and disassembly of their own structure and the cleaning structure at the connection points; Energy storage box 113 The timer 114 on the surface, together with the control panel 115, controls the motor 37. The motor 37 drives the drive gear 35 to rotate. The drive gear 35, together with several teeth 36, drives the driven ring 32 to rotate. The driven ring 32 drives the first rotating ring 31 and the second rotating ring 33 to rotate on the inner walls of the first rotating groove 28 and the second rotating groove 14, respectively, so as to limit their rotation. The driven ring 32 drives the two strip scrapers 38 on the inner wall to rotate on the inner wall of the filter tube 11, scraping away impurities on the inner wall and the surface of the two third filter screens 19, improving the cleaning effect of the device and preventing blockage inside the filter structure.

[0042] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sand control device for oil wells, characterized in that, Includes a wellhead (1), a filter pipe (11) is provided at the top of the wellhead (1), oil guide pipes (12) are provided on both sides of the filter pipe (11), and a top plate (13) is provided above the wellhead (1). The surface of the top of the filter pipe (11) is connected to the top plate (13) by a connecting component (2). The connecting assembly (2) includes a connecting ring (21) installed on the top surface of the filter tube (11). First slots (22) are provided on both sides of the top of the connecting ring (21). Two arc-shaped connecting plates (23) engage at opposite edges between the two connecting rings (21). First blocks (24) are provided at the bottom of each of the two arc-shaped connecting plates (23). The inner walls of the two first slots (22) engage with the surfaces of the two first blocks (24), and the inner walls of the two first slots (22) engage with the bottom surfaces of the two arc-shaped connecting plates (23). The first locking block (24) provided in each part is engaged and connected. The top of each of the two arc-shaped connecting plates (23) is provided with a second locking block (25). The surface of the two second locking blocks (25) is engaged and connected with the second locking groove (27) provided on both sides of the bottom of the mounting ring (26). The top of the mounting ring (26) is installed and connected to the bottom of the top plate (13). The bottom edge of the inner wall of the mounting ring (26) is provided with a first rotating groove (28). The inner wall of the first rotating groove (28) is rotatably connected to the second rotating groove (14) provided on the top of the filter tube (11) through the cleaning component (3). The cleaning component (3) includes a first rotating ring (31) installed on the inner wall of the first rotating groove (28). The bottom of the first rotating ring (31) is fixedly connected to the top of the driven ring (32). The bottom of the driven ring (32) is provided with a second rotating ring (33). The bottom of the second rotating ring (33) is rotatably connected to the inner wall of the second rotating groove (14). The side of the driven ring (32) is provided with a plurality of toothed grooves (34). The inner wall of the plurality of toothed grooves (34) is meshed with a plurality of teeth (36) on the side of the drive gear (35). The bottom of the drive gear (35) is fixedly connected to the output shaft of the motor (37). The bottom of the motor (37) is installed and connected to the top of the connecting ring (21). Both sides of the inner wall of the driven ring (32) are provided with strip scrapers (38). The surfaces of the two strip scrapers (38) are rotatably connected to the inner wall of the filter tube (11).

2. The oil well sand control device according to claim 1, characterized in that: The inner edge of the mounting ring (26) has an annular groove (29), and the inner wall of the annular groove (29) is engaged with the snap ring (16) provided on the top edge of the first filter screen (15). The side of the first filter screen (15) is rotatably connected to the inner wall of the driven ring (32).

3. The oil well sand control device according to claim 1, characterized in that: The surfaces of the two first mounting blocks (24) and the two second mounting blocks (25) are respectively provided with two first mounting holes (210) and two mounting holes (211). The inner walls of the two first mounting holes (210) are engaged with the first slots (213) provided on the inner walls of the two first mounting slots (22) by two first mounting pins (212). The inner walls of the two second mounting holes (211) are engaged with the second slots (215) provided on the inner walls of the two second mounting slots (27) by two second mounting pins (214).

4. The oil well sand control device according to claim 1, characterized in that: A second filter screen (17) is provided at the connection between the inner wall of the wellhead (1) and the filter pipe (11). The top two sides of the second filter screen (17) are fixedly connected to the bottom two sides of the first filter screen (15) by two connecting rods (18).

5. The oil well sand control device according to claim 1, characterized in that: Two third filter screens (19) are engaged at the connection between the inner wall of the filter tube (11) and the two oil guide tubes (12).

6. The oil well sand control device according to claim 1, characterized in that: The mounting ring (26) has two mating holes (216) on both sides of its top. The inner walls of the two mating holes (216) are threadedly connected to the insertion holes (111) on both sides of the top of the top plate (13) by two connecting bolts (110). The top of the top plate (13) has an oil outlet (112) in the middle.

7. The oil well sand control device according to claim 1, characterized in that: An energy storage box (113) is provided on one side of the top of the connecting ring (21), and a timer (114) and a control panel (115) are respectively provided on the surface of the energy storage box (113).

Images