Adjustable plugging device for oil exploitation

Abstract

The invention discloses an adjustable plugging device for oil exploitation, and relates to the technical field of oil field equipment. The device comprises multiple supporting blocks, a mounting frame is fixedly connected to the bottoms of the multiple supporting blocks, a supporting plate is fixedly connected to the bottom of the mounting frame, a connecting rod is fixedly connected to the top of the inner wall of the mounting frame, a fixator is fixedly connected to the bottom of the connecting rod, and a plugging head is fixedly connected to the bottom of the fixator. The outer walls of the multiple supporting blocks are fixedly connected with a supporting ring, and the top of the supporting ring is fixedly connected with two electric push rods. Through the arrangement of the fixing device, the electric push rod, the pressing ring, the annular drum bag and other assemblies, in the downward moving process of the annular drum bag, the lower expansion part of the annular drum bag can make contact with the top of the fixing device, and then the annular drum bag can expand towards the periphery between the fixing device and the pressing ring and abut against the inner wall of an oil well; therefore, the sealing effect of the annular drum bag is improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil field equipment, in particular to an adjustable plugging device for oil mining. Background Art

[0002] During the maintenance or replacement of oil well equipment, the plugger can temporarily block the fluid channel of the oil well, providing time and space for the oil well equipment to be inspected, cleaned or replaced. At the same time, the plugger can flexibly adjust the sealing force according to the wellhead pressure and fluid status through its adjustable design, providing a more precise and reliable sealing effect.

[0003] A Chinese patent with patent announcement number CN215907803U discloses a wellhead rapid plugger, including a plugger, a plugging head fixedly installed at the bottom of the plugger, a welding frame welded to the outer surface of the plugger, one end of the welding frame fixedly connected to a jacking frame, a jacking rod movably connected to the bottom of the jacking frame, a pressure frame fixedly sleeved on the outer surface of the plugging head, a top cover fixedly installed on the top of the pressure frame, top holes are opened on the left and right sides of the top cover, a bottom hole is opened at the bottom of the pressure frame, an extrusion ring is movably sleeved inside the pressure frame, an extrusion rod is fixedly connected to the bottom of the extrusion ring, and a pressure pad is fixedly connected to the bottom of the extrusion rod. In the patent, when oil is produced, if the extraction force is too large, the plugger will become unstable and easy to fall off, affecting the safety of the plugging. At this time, the mutual cooperation between the internal devices of the jacking frame and the pressure frame can improve the integrity of the plugger, improve the stability of the plugger, prevent it from falling off, and improve its safety.

[0004] However, the plugger currently has the following problems: the gaps between the multiple extrusion rods and the pressure pads in the device are relatively large, which results 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 propose an adjustable plugger for oil mining. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides an adjustable plugging device for oil mining, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an adjustable plugging device for oil mining, comprising multiple support blocks, the bottom of the multiple support blocks is fixedly connected to a mounting frame, the bottom of the mounting frame is fixedly connected to a support plate, the top of the inner wall of the mounting frame is fixedly connected to a connecting rod, the bottom of the connecting rod is fixedly connected to a fixer, the bottom of the fixer is fixedly connected to a plugging head, the outer wall of the multiple support blocks is fixedly connected to a support ring, the top of the support ring is fixedly connected to two electric push rods, the bottoms of the telescopic ends of the two electric push rods are fixedly connected to the same pressure ring, the bottom of the pressure ring is fixedly connected to an annular drum bag, the inner wall of the pressure ring is fixedly connected to a T-shaped hollow push block, the bottom of the T-shaped hollow push block is fixedly connected to an annular extrusion plate, the bottom of the annular extrusion plate is fixedly connected to an air storage bag, the bottom of the air storage bag is fixedly connected to the top of the support plate, and the top of the air storage bag is fixedly connected to the top of the support plate. A connecting tube is fixedly connected, and the top of the connecting tube is fixedly connected with an air guide ring, and the outer wall of the air guide ring is fixedly connected to the inner wall of the annular drum bag, and the outer wall of the connecting tube is embedded in the inside of the annular extrusion plate, and the air guide ring is fixedly connected to the top of the annular extrusion plate, and the multiple support blocks and the plugging head are installed to the required positions in the oil well, and then the two electric push rods are started by the external controller, and the telescopic ends of the two electric push rods will simultaneously push the pressure ring to move downward, and the downward movement of the pressure ring will push the annular drum bag to move in the direction of the fixer, and at the same time, the downward movement of the pressure ring drives the T-shaped hollow push block to move downward, and the downward movement of the T-shaped hollow push block drives the annular extrusion plate to squeeze the air storage bag, and the squeezing of the air storage bag will cause the internal air to enter the annular drum bag through the connecting tube and the air guide ring. Because the top of the annular drum bag is restricted by the pressure ring, the bottom of the annular drum bag will expand first, and at the same time, during the downward movement of the annular drum bag

[0007] According to the above technical solution, a plurality of annular rubber rings are fixed to the outer circumferential surface of the annular drum bag. When the annular drum bag expands around, the annular rubber rings are driven to contact the inner wall of the oil well. When the annular rubber rings contact the inner wall of the oil well, the friction force can be increased to help the annular drum bag to remain stably on the inner wall of the oil well.

[0008] According to the above technical solution, an anti-breakage device is provided at the bottom of the annular drum bladder, and the anti-breakage device includes a fixing ring, the top of the fixing ring is fixedly connected to the bottom of the annular drum bladder, and a plurality of connecting arc blocks are evenly fixed on the outer circumferential surface of the fixing ring, and a plurality of connecting arc blocks are fixedly connected to the same scraper ring on one side away from the fixing ring, and a placement groove for placing the fixing ring, a plurality of connecting arc blocks and the scraper ring is provided at the top of the fixing device. When the annular drum bladder moves downward, the annular drum bladder will drive the fixing ring to move downward, and the downward movement of the fixing ring will drive the plurality of connecting arc blocks to move downward, and the downward movement of the plurality of connecting arc blocks will drive the scraper ring to move downward along the inner wall of the oil well, and when the scraper ring moves downward along the inner wall of the oil well, the oil sludge adhered to the inner wall of the oil well will be pushed downward.

[0009] According to the above technical solution, the anti-breakage device also includes a plurality of separating tip blocks, the tops of which are fixedly connected to the bottom of the scraper ring. When the scraper ring moves downward along the inner wall of the oil well, it will also drive the plurality of separating tip blocks to separate the sludge adhered to the inner wall of the oil well.

[0010] According to the above technical solution, an anti-pollution device is arranged above the inner wall of the fixture, and the anti-pollution device includes a guide bevel ring, the outer circumferential surface of the guide bevel ring is fixedly connected to the upper inner wall of the fixture, and the bottom of the guide bevel ring is fixedly connected to a collecting box, and the sludge scraped off by the scraper ring will enter the collecting box through the guide bevel ring, thereby avoiding the scraper ring at the top of the fixture, making it difficult for the annular bulge to be in close contact with the top of the fixture, and making it impossible for the fixing ring, multiple connecting arc blocks and the scraper ring to enter the placement groove.

[0011] According to the above technical scheme, the anti-pollution device also includes a spiral groove column, the top of the spiral groove column is fixedly connected to the bottom of the annular extrusion plate, the outer wall of the spiral groove column is provided with a spiral groove, the bottom of the support plate is rotatably connected with a swivel, and a slider for slidingly installing inside the spiral groove of the spiral groove column is fixed on the inner wall of the swivel, and the outer wall of the swivel is fixedly connected with multiple connecting blocks, and the sides of multiple connecting blocks away from the swivel are fixedly connected with oblique guide blocks, and the sides of multiple oblique guide blocks are provided with guide grooves, and the inclined surfaces of the oblique guide blocks are in contact with the inner oblique surfaces of the guide oblique rings. When the annular extrusion plate moves downward, it will drive the spiral groove column to move downward, and the downward movement of the spiral groove column will cause the slider on the inner wall of the swivel to rotate along the inner wall of the spiral groove of the spiral groove column, thereby causing the swivel to rotate, and the rotation of the swivel will drive the multiple connecting blocks to rotate, and the rotation of the multiple connecting blocks will drive the oblique guide blocks to rotate.

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

[0013] (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.

[0014] (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

[0015] Figure 1 A schematic diagram of the present invention as a whole; Figure 2 It is a schematic diagram of the side section structure of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the structure at A in the middle; Figure 4 It is a structural schematic diagram of the air storage bag of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the structure at B in the middle; Figure 6 The structure of the anti-breakage device of the present invention is shown in FIG. Figure 1 ; Figure 7 The structure of the anti-breakage device of the present invention is shown in FIG. Figure 2 ; Figure 8 It is a schematic structural diagram of the anti-pollution device of the present invention.

[0016] In the figure: 1. Multiple support blocks; 2. Connecting rod; 3. Fixer; 4. Sealing head; 5. Support plate; 6. Mounting frame; 7. Support ring; 8. Anti-breakage device; 81. Fixing ring; 82. Connecting arc block; 83. Scraper ring; 84. Placement groove; 85. Separation tip block; 9. Anti-pollution device; 91. Guide oblique ring; 92. Collecting box; 93. Spiral groove column; 94. Rotating ring; 95. Connecting block; 96. Oblique guide block; 97. Guide groove; 10. Electric push rod; 11. Pressing ring; 12. Annular drum bag; 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. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] See also Figure 1-Figure 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.

[0019] 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.

[0020] 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.

[0021] The anti-breakage device 8 also includes a plurality of separating pointed blocks 85, the tops of which are fixedly connected to the bottom of the scraper ring 83. Through the arrangement of the above structure, when the scraper ring 83 moves downward along the inner wall of the oil well, it will also drive the plurality of separating pointed blocks 85 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 12.

[0022] When in use, the multiple support blocks 1 and the plugging head 4 are installed to the required positions in the oil well, and then the two electric push rods 10 are started through the external controller. The telescopic ends of the two electric push rods 10 will simultaneously push the pressure ring 11 downward, and the downward movement of the pressure ring 11 will push the annular drum bag 12 to move in the direction of the fixer 3. At the same time, the downward movement of the pressure ring 11 drives the T-shaped hollow push block 13 to move downward, and the downward movement of the T-shaped hollow push block 13 drives the annular extrusion plate 14 to squeeze the air storage bag 15. The squeezing of the air storage bag 15 will cause the air inside to enter the annular drum bag 12 through the connecting pipe 16 and the air guide ring 17. Because the upper side of the annular drum bag 12 is restricted by the pressure ring 11, the bottom of the annular drum bag 12 The annular drum 12 will expand first, and at the same time, in the process of the annular drum 12 moving downward, the expanded part below the annular drum 12 will contact the top of the fixer 3, and then the annular drum 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 12; at the same time, when the surroundings of the annular drum 12 expand, 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, it can increase the friction force, help the annular drum 12 to remain stably on the inner wall of the oil well, prevent the annular drum 12 from being displaced or offset after expansion, and enhance the durability and reliability of the sealing of the annular drum 12 through the effect of friction.

[0023] When the annular drum 12 moves downward, the annular drum 12 will drive the fixed ring 81 to move downward, and the fixed ring 81 will move downward to drive the multiple connecting arc blocks 82 to move downward, and the multiple connecting arc blocks 82 will move downward to drive the scraper ring 83 to move downward along the inner wall of the oil well. 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, so as to avoid the annular drum 12 being hindered by the sludge when expanding and sealing, making it difficult for the annular drum 12 to completely contact with the inner wall of the oil well, thereby The sealing effect of the annular drum 12 is reduced; at the same time, the fixed ring 81, multiple connecting arc blocks 82 and the scraper ring 83 will enter the placement groove 84, thereby ensuring that the fixed ring 81, multiple connecting arc blocks 82 and the scraper ring 83 will not hinder the contact between the annular drum 12 and the top of the fixture 3; when the scraper ring 83 moves downward along the inner wall of the oil well, it will also drive a number of separating sharp blocks 85 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 faster, ensuring the normal use of the annular drum 12.

[0024] See also Figure 1-Figure 8 On the basis of the above-mentioned embodiment, in another embodiment of the present invention, an anti-pollution device 9 is arranged above the inner wall of the fixture 3, and the anti-pollution device 9 includes a guide bevel ring 91, and the outer circumferential surface of the guide bevel ring 91 is fixedly connected to the upper inner wall of the fixture 3, and the bottom of the guide bevel ring 91 is fixedly connected to a collecting box 92. Through the setting of the above-mentioned structure, it is difficult for the annular drum 12 to be in close contact with the top of the fixture 3, and the fixing ring 81, multiple connecting arc blocks 82 and scraper ring 83 cannot enter the placement groove 84, resulting in the problem that the annular drum 12 cannot contact the top of the fixture 3.

[0025] The anti-pollution device 9 also includes 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, and the bottom of the support plate 5 is rotatably connected with a swivel 94, the inner wall of which is fixedly provided with a slider for slidingly installing inside the spiral groove of the spiral groove column 93, the outer wall of the swivel 94 is fixedly connected with a plurality of connecting blocks 95, the side of the plurality of connecting blocks 95 away from the swivel 94 is fixedly connected with an oblique guide block 96, the side surfaces of the plurality of oblique guide blocks 96 are provided with guide grooves 97, the inclined surfaces of the oblique guide blocks 96 are in contact with the inner oblique surfaces of the guide oblique ring 91, through the arrangement of the above structure, the swivel 94 rotates, the rotation of the swivel 94 drives the plurality of connecting blocks 95 to rotate, the rotation of the plurality of connecting blocks 95 drives the oblique guide blocks 96 to rotate, and the rotation of the oblique guide blocks 96 accelerates the speed at which the sludge on the inclined surface of the guide oblique ring 91 enters the collection box 92 through the guide groove 97.

[0026] When in use, the sludge scraped off by the scraper ring 83 will enter the collection box 92 through the guiding beveled ring 91, thereby avoiding the scraper ring 83 at the top of the fixer 3, making it difficult for the annular drum bag 12 to be in close contact with the top of the fixer 3, and making it impossible for the fixing ring 81, multiple connecting arc blocks 82 and the scraper ring 83 to enter the placement groove 84, resulting in the problem that the annular drum bag 12 cannot contact the top of the fixer 3; when the annular extrusion 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 multiple connecting blocks 95 to rotate. The rotation of multiple connecting blocks 95 drives the oblique guide block 96 to rotate. The rotation of the oblique guide block 96 will accelerate the speed at which the sludge on the inclined surface of the guiding beveled ring 91 enters the collection box 92 through the guide groove 97.

[0027] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which 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, characterized in that: 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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