An adjustable plugging device for oil exploitation

Abstract

The present invention discloses an adjustable plug for oil mining, and relates to the technical field of oilfield equipment. The present invention comprises a multiple support block, the bottom of the multiple support block is fixedly connected with a mounting frame, the bottom of the mounting frame is fixedly connected with a support plate, the top of the inner wall of the mounting frame is fixedly connected with a connecting rod, the bottom of the connecting rod is fixedly connected with a fixture, the bottom of the fixture is fixedly connected with a plugging head, the outer wall of the multiple support block is fixedly connected with a support ring, and the top of the support ring is fixedly connected with two electric push rods. The present invention arranges components such as a fixture, an electric push rod, a pressure ring, and an annular drum bladder, so that during the downward movement of the annular drum bladder, the lower expanded part of the annular drum bladder will contact the top of the fixture, and then the annular drum bladder will expand to the surroundings between the fixture and the pressure ring, and contact the inner wall of the oil well, thereby improving the sealing effect of the annular drum bladder.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield equipment, and specifically provides an adjustable plugging device for oil production. Background Technique

[0002] During the maintenance or replacement of oil well equipment, the plugging device can temporarily seal the fluid passage of the oil well, providing time and space for the oil well equipment to be repaired, cleaned or replaced. At the same time, through an adjustable design, the plugging device can flexibly adjust the plugging force according to the wellhead pressure and fluid state, providing a more accurate and reliable sealing effect.

[0003] Chinese Patent with the patent announcement number CN215907803U discloses a wellhead rapid plugging device, including a plugging device. A plugging head is fixedly installed at the bottom of the plugging device. A welding frame is welded on the outer surface of the plugging device. One end of the welding frame is fixedly connected to a jacking frame. A jacking rod is movably connected to the bottom of the jacking frame. A pressurizing frame is fixedly sleeved on the outer surface of the plugging head. A top cover is fixedly installed on the top of the pressurizing frame. Top holes are opened on both the left and right sides of the top cover. A bottom hole is opened at the bottom of the pressurizing frame. An extrusion sleeve ring is movably sleeved inside the pressurizing frame. An extrusion rod is fixedly connected to the bottom of the extrusion sleeve ring. A pressurizing pad is fixedly connected to the bottom of the extrusion rod. When this patent is used for oil production, if the extraction force is too large, it will cause the instability of the plugging device and it is easy to fall off, affecting the safety of plugging. At this time, by the mutual cooperation between the internal devices of the jacking frame and the pressurizing frame, the integrity of the plugging device can be improved, the stability of the plugging device can be improved, the falling off can be prevented, and the safety can be improved.

[0004] However, the current plugging device has the following problems: The gaps between multiple extrusion rods and pressurizing pads in this device are relatively large, resulting in the outer wall of the plugging head being unable to fully contact the inner wall of the oil well, thus affecting the plugging effect. Therefore, we have proposed an adjustable plugging device for oil production. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an adjustable plugging device for oil production, which solves the problems raised in the above background technique.

[0006] To achieve the above object, the present invention is realized by the following technical solutions: An adjustable plugging device for oil exploitation, comprising multiple support blocks, the bottom of the multiple support blocks is fixedly connected with a mounting frame, the bottom of the mounting frame is fixedly connected with a support plate, the top of the inner wall of the mounting frame is fixedly connected with a connecting rod, the bottom of the connecting rod is fixedly connected with a fixator, the bottom of the fixator is fixedly connected with a plugging head, the outer wall of the multiple support blocks is fixedly connected with a support ring, the top of the support ring is fixedly connected with two electric push rods, the bottom of the telescopic ends of the two electric push rods is fixedly connected with the same pressing ring, the bottom of the pressing ring is fixedly connected with an annular drum, the inner wall of the pressing ring is fixedly connected with a T-shaped hollow push block, the bottom of the T-shaped hollow push block is fixedly connected with an annular extrusion plate, the bottom of the annular extrusion plate is fixedly connected with an air storage bag, the bottom of the air storage bag is fixedly connected to the top of the support plate, the top of the air storage bag is fixedly connected with a connecting pipe, the top of the connecting pipe is fixedly connected with a gas guiding ring, the outer wall of the gas guiding ring is fixedly connected to the inner wall of the annular drum, the outer wall of the connecting pipe is embedded in the inside of the annular extrusion plate, the gas guiding ring is fixedly connected to the top of the annular extrusion plate. Install the multiple support blocks and the plugging head at the required positions in the oil well, and then start the two electric push rods through an external controller. The telescopic ends of the two electric push rods will simultaneously push the pressing ring downward. The downward movement of the pressing ring will push the annular drum towards the fixator. At the same time, the downward movement of the pressing ring drives the T-shaped hollow push block downward, and the downward movement of the T-shaped hollow push block drives the annular extrusion plate to squeeze the air storage bag. The air storage bag being squeezed will cause the air inside to enter the annular drum through the connecting pipe and the gas guiding ring. Since the upper part of the annular drum is restricted by the pressing ring, the bottom of the annular drum will expand first. At the same time, during the downward movement of the annular drum.

[0007] According to the above technical solution, a plurality of annular rubber rings are fixed on the outer circumferential surface of the annular drum. When the annular drum expands around its circumference, it will drive the annular rubber rings to contact the inner wall of the oil well. When the annular rubber rings contact the inner wall of the oil well, it can increase the friction force and help the annular drum to stably stay on the inner wall of the oil well.

[0008] According to the above technical solution, a damage prevention device is provided at the bottom of the annular bulge. The damage prevention device includes a fixing ring, the top of the fixing ring is fixedly connected to the bottom of the annular bulge, a plurality of connecting arc blocks are evenly fixed on the outer circumferential surface of the fixing ring, and the same scraping ring is fixedly connected to the side of the plurality of connecting arc blocks away from the fixing ring. A placement groove for placing the fixing ring, a plurality of connecting arc blocks and the scraping ring is provided at the top of the holder. When the annular bulge moves downward, the annular bulge drives the fixing ring to move downward, the downward movement of the fixing ring drives the plurality of connecting arc blocks to move downward, and the downward movement of the plurality of connecting arc blocks drives the scraping ring to move downward along the inner wall of the oil well. When the scraping ring moves downward along the inner wall of the oil well, the sludge adhered to the inner wall of the oil well will be pushed downward.

[0009] According to the above technical solution, the damage prevention device further includes a plurality of separating pointed blocks, the tops of the plurality of separating pointed blocks are fixedly connected to the bottom of the scraping ring, and when the scraping ring moves downward along the inner wall of the oil well, the plurality of separating pointed blocks will drive to divide the sludge adhered to the inner wall of the oil well at the same time.

[0010] According to the above technical solution, a pollution prevention device is provided above the inner wall of the holder. The pollution prevention device includes a guiding inclined ring, the outer circumferential surface of the guiding inclined ring is fixedly connected to the upper part of the inner wall of the holder, and a collecting box is fixedly connected to the bottom of the guiding inclined ring. The sludge scraped off by the scraping ring will enter the collecting box through the guiding inclined ring, so as to prevent the scraping ring from being at the top of the holder, making it difficult for the annular bulge to be in close contact with the top of the holder, and preventing the fixing ring, a plurality of connecting arc blocks and the scraping ring from entering the placement groove.

[0011] According to the above technical solution, the pollution prevention device further includes a spiral groove column, the top of the spiral groove column is fixedly connected to the bottom of the annular pressing plate, a spiral groove is provided on the outer wall of the spiral groove column, a rotating ring is rotatably connected to the bottom of the support plate, and a slider for slidably installing inside the spiral groove of the spiral groove column is fixed at the inner wall of the rotating ring. A plurality of connecting blocks are fixedly connected to the outer wall of the rotating ring, and inclined guiding blocks are fixedly connected to the sides of the plurality of connecting blocks away from the rotating ring. Guide grooves are provided on the sides of the plurality of inclined guiding blocks. The inclined surface of the inclined guiding block is in contact with the inner inclined surface of the guiding inclined ring. When the annular pressing plate moves downward, it drives the spiral groove column to move downward. The downward movement of the spiral groove column causes the slider on the inner wall of the rotating ring to rotate along the inner wall of the spiral groove of the spiral groove column, so that the rotating ring rotates. The rotation of the rotating ring drives the plurality of connecting blocks to rotate, and the rotation of the plurality of connecting blocks drives the inclined guiding blocks to rotate.

[0012] The present invention provides an adjustable plugging device for oil extraction, which has the following beneficial effects:

[0013] (1) The present invention arranges a fixer, an electric push rod, a pressure ring, an annular drum bag, a T-shaped hollow push block, an annular extrusion plate, an air storage bag, a connecting pipe, and an air guide ring so that during the downward movement of the annular drum bag, the lower expanded portion of the annular drum bag will contact the top of the fixer, and then the annular drum bag will expand in all directions between the fixer and the pressure ring and contact the inner wall of the oil well, thereby improving the sealing effect of the annular drum bag; at the same time, through the cooperation of the annular rubber ring and the annular drum bag, when the annular drum bag expands around, it will drive the annular rubber ring to contact the inner wall of the oil well. When the annular rubber ring contacts the inner wall of the oil well, it can increase the friction force, help the annular drum bag to stably remain on the inner wall of the oil well, prevent the annular drum bag from being displaced or offset after expansion, and enhance the durability and reliability of the annular drum bag sealing through the action of friction force.

[0014] (2) The present invention provides an anti-breakage device, so that the fixed ring, the connecting arc block, the scraper ring and the placement groove cooperate, so that when the scraper ring moves downward along the inner wall of the oil well, the sludge adhered to the inner wall of the oil well will be pushed downward, thereby avoiding the annular drum being hindered by the sludge when expanding and sealing, resulting in the annular drum being difficult to completely contact with the inner wall of the oil well, thereby reducing the sealing effect of the annular drum; at the same time, through the cooperation of the separating tip block and the scraper ring, when the scraper ring moves downward along the inner wall of the oil well, it will drive a number of separating tip blocks to separate the sludge adhered to the inner wall of the oil well, so that the sludge adhered to the inner wall of the oil well can be cleaned up more quickly, ensuring the normal use of the annular drum.

[0015] (3) The present invention sets an anti-pollution device so that the cooperation of the guiding bevel ring and the collecting box makes it difficult for the annular drum bag to be in close contact with the top of the fixing device, and makes it impossible for the fixing ring, multiple connecting arc blocks and the scraper ring to enter the placement groove, resulting in the problem that the annular drum bag cannot be in contact with the top of the fixing device; at the same time, through the cooperation of the guiding bevel ring, the collecting box, the spiral groove column, the swivel ring, the connecting block, the bevel guide block and the guide groove, the swivel ring rotates, and the rotation of the swivel ring drives the multiple connecting blocks to rotate, and the rotation of the multiple connecting blocks drives the bevel guide block to rotate, and the rotation of the bevel guide block accelerates the speed at which the sludge on the inclined surface of the guiding bevel ring enters the collecting box through the guide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the present invention as a whole;

[0017] Figure 2 It is a schematic diagram of the side section structure of the present invention;

[0018] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at A in the middle;

[0019] Figure 4 It is a structural schematic diagram of the air storage bag of the present invention;

[0020] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at position B in the present invention;

[0021] Figure 6 Schematic diagram of the structure at the anti-breakage device of the present invention Figure 1 ;

[0022] Figure 7 Schematic diagram of the structure at the anti-breakage device of the present invention Figure 2 ;

[0023] Figure 8 Schematic diagram of the structure at the anti-pollution device of the present invention.

[0024] In the figure: 1. Multiple support blocks; 2. Connecting rod; 3. Fixator; 4. Plugging head; 5. Support plate; 6. Installation frame; 7. Support ring; 8. Anti-breakage device; 81. Fixed ring; 82. Connecting arc block; 83. Scraping ring; 84. Placing groove; 85. Separating pointed block; 9. Anti-pollution device; 91. Guide inclined ring; 92. Collection box; 93. Spiral groove column; 94. Rotating ring; 95. Connecting block; 96. Inclined guide block; 97. Guide groove; 10. Electric push rod; 11. Pressing ring; 12. Annular drum; 13. T-shaped hollow push block; 14. Annular extrusion plate; 15. Air storage bag; 16. Connecting pipe; 17. Air guide ring; 18. Annular rubber ring. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 of the embodiments.

[0026] Please refer to Figures 1-8An embodiment of the present invention is: an adjustable plugging device for oil mining, comprising a multiple support block 1, a mounting frame 6 is fixedly connected to the bottom of the multiple support block 1, a support plate 5 is fixedly connected to the bottom of the mounting frame 6, a connecting rod 2 is fixedly connected to the top of the inner wall of the mounting frame 6, a fixture 3 is fixedly connected to the bottom of the connecting rod 2, a plugging head 4 is fixedly connected to the bottom of the fixture 3, a support ring 7 is fixedly connected to the outer wall of the multiple support block 1, two electric push rods 10 are fixedly connected to the top of the support ring 7, the telescopic ends of the two electric push rods 10 are fixedly connected to the same pressure ring 11 at the bottom, an annular drum sac 12 is fixedly connected to the bottom of the pressure ring 11, a T-shaped hollow push block 13 is fixedly connected to the inner wall of the pressure ring 11, and an annular extrusion plate 14 is fixedly connected to the bottom of the T-shaped hollow push block 13, An air storage bag 15 is fixedly connected to the bottom of the annular extrusion plate 14, and the bottom of the air storage bag 15 is fixedly connected to the top of the support plate 5. A connecting tube 16 is fixedly connected to the top of the air storage bag 15, and an air guide ring 17 is fixedly connected to the top of the connecting tube 16. The outer wall of the air guide ring 17 is fixedly connected to the inner wall of the annular drum sac 12. The outer wall of the connecting tube 16 is embedded in the interior of the annular extrusion plate 14, and the air guide ring 17 is fixedly connected to the top of the annular extrusion plate 14. Through the arrangement of the above structure, during the downward movement of the annular drum sac 12, the lower expanded part of the annular drum sac 12 will contact the top of the fixer 3, and then the annular drum sac 12 will expand to the surroundings between the fixer 3 and the pressure ring 11, and contact the inner wall of the oil well, thereby improving the sealing effect of the annular drum sac 12.

[0027] A plurality of annular rubber rings 18 are fixed to the outer circumferential surface of the annular drum 12. Through the arrangement of the above-mentioned structure, when the annular drum 12 expands around, the annular rubber ring 18 will be driven to contact the inner wall of the oil well. When the annular rubber ring 18 contacts the inner wall of the oil well, the friction force can be increased to help the annular drum 12 to remain stably on the inner wall of the oil well, and prevent the annular drum 12 from being displaced or offset after expansion. Through the effect of friction force, the durability and reliability of the sealing of the annular drum 12 are enhanced.

[0028] An anti-breakage device 8 is provided at the bottom of the annular drum 12, and the anti-breakage device 8 includes a fixing ring 81, the top of the fixing ring 81 is fixedly connected to the bottom of the annular drum 12, and a plurality of connecting arc blocks 82 are evenly fixed on the outer circumferential surface of the fixing ring 81, and a plurality of connecting arc blocks 82 are fixedly connected to the same scraper ring 83 on the side away from the fixing ring 81. A placement groove 84 for placing the fixing ring 81, a plurality of connecting arc blocks 82 and the scraper ring 83 is provided on the top of the fixture 3. Through the setting of the above structure, when the scraper ring 83 moves downward along the inner wall of the oil well, it will push the sludge adhered to the inner wall of the oil well downward, thereby avoiding the annular drum 12 from being hindered by the sludge when expanding and sealing, resulting in the annular drum 12 being difficult to completely contact with the inner wall of the oil well, thereby reducing the sealing effect of the annular drum 12.

[0029] The anti-breakage device 8 further includes a plurality of separating pointed blocks 85. The tops of the plurality of separating pointed blocks 85 are fixedly connected to the bottom of the scraping ring 83. Through the setting of the above structure, when the scraping ring 83 moves downward along the inner wall of the oil well, it will drive the plurality of separating pointed blocks 85 to divide the sludge adhered to the inner wall of the oil well, so that the sludge adhered to the inner wall of the oil well can be cleaned up faster, ensuring the normal use of the annular bulge 12.

[0030] During use, the multi-support block 1 and the plugging head 4 are installed at the required positions in the oil well, and then two electric push rods 10 are started through an external controller. The telescopic ends of the two electric push rods 10 will simultaneously push the pressure ring 11 downward. The downward movement of the pressure ring 11 will push the annular bulge 12 in the direction of the fixator 3. At the same time, the downward movement of the pressure ring 11 drives the T-shaped hollow push block 13 to move downward. The downward movement of the T-shaped hollow push block 13 drives the annular extrusion plate 14 to extrude the air storage bag 15. The air storage bag 15 is extruded to make the internal air enter the annular bulge 12 through the connecting pipe 16 and the air guide ring 17. Because the upper part of the annular bulge 12 is restricted by the pressure ring 11, the bottom of the annular bulge 12 will expand first. At the same time, during the downward movement of the annular bulge 12, the expanded part at the bottom of the annular bulge 12 will contact the top of the fixator 3, and then the annular bulge 12 will expand around between the fixator 3 and the pressure ring 11 and abut against the inner wall of the oil well, thereby improving the sealing effect of the annular bulge 12; at the same time, when the annular bulge 12 expands around, it will drive the annular rubber ring 18 to contact the inner wall of the oil well. When the annular rubber ring 18 contacts the inner wall of the oil well, it can increase the friction force and help the annular bulge 12 to stably stay on the inner wall of the oil well, preventing the annular bulge 12 from shifting or deviating after expansion. Through the action of the friction force, the durability and reliability of the plugging of the annular bulge 12 are enhanced.

[0031] When the annular drum 12 moves downward, the annular drum 12 drives the fixed ring 81 to move downward. The downward movement of the fixed ring 81 drives multiple connecting arc blocks 82 to move downward. The downward movement of the multiple connecting arc blocks 82 drives the scraping ring 83 to move downward along the inner wall of the oil well. When the scraping ring 83 moves downward along the inner wall of the oil well, it will push the sludge adhering to the inner wall of the oil well downward, thus preventing the annular drum 12 from being blocked by the sludge when expanding and sealing, which makes it difficult for the annular drum 12 to fully contact the inner wall of the oil well, thereby reducing the sealing effect of the annular drum 12. At the same time, the fixed ring 81, multiple connecting arc blocks 82 and the scraping ring 83 will enter the placement groove 84, so as to ensure that the fixed ring 81, multiple connecting arc blocks 82 and the scraping ring 83 will not hinder the contact between the annular drum 12 and the top of the fixator 3. When the scraping ring 83 moves downward along the inner wall of the oil well, it will also drive several separating pointed blocks 85 to divide the sludge adhering to the inner wall of the oil well, so that the sludge adhering to the inner wall of the oil well can be cleaned up faster, ensuring the normal use of the annular drum 12.

[0032] Please refer to Figures 1-8 Based on the above embodiments, in another embodiment of the present invention, an anti-pollution device 9 is provided above the inner wall of the fixator 3. The anti-pollution device 9 includes a guiding inclined ring 91. The outer circumferential surface of the guiding inclined ring 91 is fixedly connected to the upper part of the inner wall of the fixator 3, and a collecting box 92 is fixedly connected to the bottom of the guiding inclined ring 91. Through the setting of the above structure, the problem that the annular drum 12 is difficult to be in close contact with the top of the fixator 3, and the fixed ring 81, multiple connecting arc blocks 82 and the scraping ring 83 cannot enter the placement groove 84, resulting in the annular drum 12 not being able to contact the top of the fixator 3 is solved.

[0033] The anti-pollution device 9 further includes a spiral groove column 93. The top of the spiral groove column 93 is fixedly connected to the bottom of the annular pressing plate 14. A spiral groove is provided on the outer wall of the spiral groove column 93. A rotating ring 94 is rotatably connected to the bottom of the support plate 5. A slider for slidably installing inside the spiral groove of the spiral groove column 93 is fixed at the inner wall of the rotating ring 94. A plurality of connecting blocks 95 are fixedly connected to the outer wall of the rotating ring 94. One side of each of the plurality of connecting blocks 95 away from the rotating ring 94 is fixedly connected with an inclined guiding block 96. A guiding groove 97 is provided on the side surface of each of the plurality of inclined guiding blocks 96. The inclined surface of the inclined guiding block 96 is in contact with the inner inclined surface of the guiding inclined ring 91. Through the setting of the above structure, when the rotating ring 94 rotates, the rotation of the rotating ring 94 will drive the plurality of connecting blocks 95 to rotate. The rotation of the plurality of connecting blocks 95 drives the inclined guiding blocks 96 to rotate. The rotation of the inclined guiding blocks 96 will accelerate the speed at which the sludge on the inclined surface of the guiding inclined ring 91 enters the collecting box 92 through the guiding groove 97.

[0034] During use, the sludge scraped off by the scraping ring 83 will enter the collection box 92 through the guiding inclined ring 91, thus preventing the scraping ring 83 from being on the top of the fixture 3, making it difficult for the annular bulge 12 to be in close contact with the top of the fixture 3, and preventing the fixing ring 81, the plurality of connecting arc blocks 82 and the scraping ring 83 from entering the placement groove 84, resulting in the problem that the annular bulge 12 cannot contact the top of the fixture 3; when the annular pressing plate 14 moves downward, it will drive the spiral groove column 93 to move downward. The downward movement of the spiral groove column 93 will cause the slider on the inner wall of the rotating ring 94 to rotate along the inner wall of the spiral groove of the spiral groove column 93, thereby causing the rotating ring 94 to rotate. The rotation of the rotating ring 94 will drive the plurality of connecting blocks 95 to rotate. The rotation of the plurality of connecting blocks 95 drives the inclined guiding block 96 to rotate. The rotation of the inclined guiding block 96 will accelerate the speed at which the sludge on the inclined surface of the guiding inclined ring 91 enters the collection box 92 through the guiding groove 97.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. An adjustable plugging device for oil mining, comprising multiple support blocks (1), characterized in that: The bottom of the multiple support block (1) is fixedly connected to a mounting frame (6), the bottom of the mounting frame (6) is fixedly connected to a support plate (5), the top of the inner wall of the mounting frame (6) is fixedly connected to a connecting rod (2), the bottom of the connecting rod (2) is fixedly connected to a fixer (3), the bottom of the fixer (3) is fixedly connected to a plugging head (4), the outer wall of the multiple support block (1) is fixedly connected to a supporting ring (7), the top of the supporting ring (7) is fixedly connected to two electric push rods (10), the bottoms of the telescopic ends of the two electric push rods (10) are fixedly connected to the same pressing ring (11), the pressing ring (11) is fixedly connected to the bottom of the telescopic ends of the two electric push rods (10), and the pressing ring (11) is fixedly connected to the bottom of the telescopic ends of the two electric push rods (10). 1) is fixedly connected to an annular drum bag (12) at the bottom, the inner wall of the pressure ring (11) is fixedly connected to a T-shaped hollow push block (13), the bottom of the T-shaped hollow push block (13) is fixedly connected to an annular extrusion plate (14), the bottom of the annular extrusion plate (14) is fixedly connected to an air storage bag (15), the bottom of the air storage bag (15) is fixedly connected to the top of the support plate (5), the top of the air storage bag (15) is fixedly connected to a connecting pipe (16), the top of the connecting pipe (16) is fixedly connected to an air guide ring (17), and the outer wall of the air guide ring (17) is fixedly connected to the inner wall of the annular drum bag (12).

2. The adjustable plugging device for oil mining according to claim 1, characterized in that: A plurality of annular rubber rings (18) are fixed to the outer circumferential surface of the annular drum bag (12).

3. The adjustable plugging device for oil mining according to claim 1 is characterized in that: The outer wall of the connecting pipe (16) is embedded in the interior of the annular extrusion plate (14), and the air guide ring (17) is fixedly connected to the top of the annular extrusion plate (14).

4. The adjustable plugging device for oil mining according to claim 1 is characterized in that: The bottom of the annular drum (12) is provided with an anti-breakage device (8), the anti-breakage device (8) comprises a fixing ring (81), the top of the fixing ring (81) is fixedly connected to the bottom of the annular drum (12), a plurality of connecting arc blocks (82) are evenly fixed on the outer circumferential surface of the fixing ring (81), a plurality of connecting arc blocks (82) are fixedly connected to the same scraper ring (83) on one side away from the fixing ring (81), and a placement groove (84) for placing the fixing ring (81), the plurality of connecting arc blocks (82) and the scraper ring (83) is provided on the top of the fixture (3).

5. The adjustable plugging device for oil mining according to claim 4 is characterized in that: The anti-breakage device (8) further comprises a plurality of separation tip blocks (85), the tops of the plurality of separation tip blocks (85) being fixedly connected to the bottom of the scraper ring (83).

6. The adjustable plugging device for oil mining according to claim 1, characterized in that: An anti-pollution device (9) is arranged above the inner wall of the holder (3), and the anti-pollution device (9) comprises a guide oblique ring (91), the outer circumferential surface of the guide oblique ring (91) is fixedly connected to the upper inner wall of the holder (3), and the bottom of the guide oblique ring (91) is fixedly connected to a collection box (92).

7. The adjustable plugging device for oil mining according to claim 6 is characterized by: The anti-pollution device (9) further comprises a spiral groove column (93), the top of which is fixedly connected to the bottom of the annular extrusion plate (14), the outer wall of which is provided with a spiral groove, the bottom of which is rotatably connected to a swivel (94), the inner wall of which is fixedly provided with a slider for slidingly mounting inside the spiral groove of the spiral groove column (93), the outer wall of which is fixedly connected to a plurality of connecting blocks (95), and the plurality of connecting blocks (95) are fixedly connected to an oblique guide block (96) on a side away from the swivel (94).

8. The adjustable plugging device for oil mining according to claim 7 is characterized in that: A plurality of the oblique guide blocks (96) are provided with guide grooves (97) on their side surfaces, and the oblique surfaces of the oblique guide blocks (96) are in contact with the inner oblique surface of the guide oblique ring (91).

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