Underground plugging tool for oil well

Abstract

The utility model discloses an oil well downhole plugging tool which comprises a packer pipe, connectors are integrally formed at the top and the bottom of the packer pipe, a connecting outer pipe is arranged above the connectors, a connecting cover is integrally formed at the bottom of the connecting outer pipe, and the connecting cover is connected with the packer pipe. The inner side wall of the connecting cover is in threaded connection with the outer side wall of the connector above the connecting cover, a righting mechanism is arranged on the outer side of the packer pipe, the righting mechanism comprises a fixing ring, two rotating rings, a plurality of arc-shaped inserting plates, a fixing plate, a plurality of fixing blocks, a plurality of supporting frames and a plurality of rolling wheels, the fixing blocks are inserted into inserting holes through the righting mechanism, and the supporting frames are inserted into the supporting frames through the rolling wheels; and then a rotating ring is rotated, the rotating ring drives an arc-shaped inserting plate to move, the arc-shaped inserting plate penetrates through a fixing groove, in this way, a fixing block, a supporting frame, a supporting plate and a rolling wheel are fixed, then the fixing plate and the rotating ring are fixed through a fastening screw, and in this way, the rotating ring can be prevented from rotating, the arc-shaped inserting plate is prevented from moving out of the fixing groove, and the fixing block and the rolling wheel are prevented from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of downhole plugging, in particular to a downhole plugging tool for an oil well. Background Art

[0002] An oilfield downhole plugging tool is a downhole tool used to isolate the annular space between the oil pipe and the oil and gas well casing or the open hole wall, also known as a packer.

[0003] After searching, the existing patent (publication number: CN221722734U) discloses an oilfield downhole plugging tool. In order to solve the problem that the existing packer tube and the connecting outer tube are straightened by spring clips, the spring clips will rub against the inner wall of the oil well during use. After long-term use, the spring clips will have a certain degree of wear and need to be replaced regularly. Since the spring clips are welded to the packer tube through the installation head, it is inconvenient to disassemble during disassembly, which is relatively inconvenient. Now, the following solution is proposed, which includes a packer tube and a connecting outer tube. The connecting outer tube is T-shaped, the top outer side of the packer tube is provided with a first external thread, the bottom inner wall of the connecting outer tube is provided with an internal thread, the connecting outer tube is threadedly connected to the packer tube, and the packer tube and the oil pipe can be straightened in the oil well by a straightening mechanism to reduce friction with the inner wall of the oil well. The roller can be fixed by a fixing mechanism, and it is convenient to disassemble and replace.

[0004] The roller is disassembled and replaced, but it has a disadvantage that the roller is fixed by multiple bolts, so replacement requires turning multiple bolts, which is troublesome. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention provides a downhole plugging tool for an oil well, which solves the problems raised by the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a downhole plugging tool for an oil well, comprising a packer tube, the top and bottom of the packer tube are integrally formed with a connecting head, a connecting outer tube is provided above the connecting head, a connecting cover is integrally formed at the bottom of the connecting outer tube, the inner side wall of the connecting cover and the outer side wall of the connecting head are screwed together, a straightening mechanism is provided on the outside of the packer tube, and the straightening mechanism comprises a fixing ring, two swivels, multiple arc-shaped inserts, a fixing plate, multiple fixing blocks, multiple support frames and multiple rollers.

[0007] Preferably, the inner wall of the fixing ring is fixedly connected to the outer wall of the isolation tube, the inner wall of the swivel ring is rotatably connected to the outer wall of the fixing ring, a plurality of insertion holes are provided on the outer wall of the fixing ring, the fixing block is inserted into the inside of the insertion holes, and a fixing groove is provided inside the fixing block.

[0008] Preferably, two sliding grooves are provided at one end of the fixed block away from the socket, and the two ends of the support frame are slidingly connected to the two sliding grooves respectively. A plurality of springs are fixed inside the sliding grooves, and the other end of the spring is fixedly connected to the support frame, and the arc-shaped plug plate passes through the fixed groove.

[0009] Preferably, the top and bottom of the arc-shaped insert plate are fixedly connected to the opposite sides of the two rotating rings respectively, and support plates are rotatably connected on both sides of the roller. The support plate is fixedly connected to one end of the support frame close to the support frame and the side of the support frame away from the fixed block.

[0010] Preferably, the top and bottom of the fixing plate are fixedly connected to the two rotating rings respectively, a through hole is provided inside the fixing plate, a threaded hole is provided on the outer wall of the fixing ring, and the fixing ring and the fixing plate are fixedly connected by the fastening screws.

[0011] Preferably, an adsorption magnetic block is fixed to one end of the fixed block close to the fixed ring, a fixed magnetic block is fixed inside the socket, the adsorption magnetic block and the fixed magnetic block are attracted to each other, a plurality of fixed sleeves are fixed to the outer wall of the fixed ring, and one end of the arc-shaped insert plate passes through the fixed groove and is located inside the fixed sleeve.

[0012] Beneficial effects

[0013] The utility model provides a downhole plugging tool for oil wells. Compared with the prior art, it has the following beneficial effects:

[0014] 1. The oil well downhole plugging tool is provided with a straightening mechanism. The fixed block is inserted into the inside of the socket, and then the swivel is rotated. The swivel moves with the arc-shaped insert plate, and the arc-shaped insert plate passes through the fixing groove, thereby fixing the fixed block, support frame, support plate and roller. Then, the fixing plate and swivel are fixed by tightening screws. This can prevent the swivel from rotating, causing the arc-shaped insert plate to move out of the fixing groove, causing the fixed block and roller to fall off.

[0015] 2. The oil well downhole plugging tool is provided with an adsorption magnetic block and a fixed magnetic block. When the fixed block is inserted into the inside of the socket, the adsorption magnetic block and the fixed magnetic block are attracted to each other, so that the fixed block, the support frame and the roller can be adsorbed. In this way, the fixed block, the support frame and the roller will not fall off when the hand is released, making it convenient to insert the arc-shaped plug-in plate into the inside of the fixed groove. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 This is a schematic cross-sectional view of the fixing block in the present invention;

[0018] Figure 3 This is a schematic structural diagram of the fixing ring in the present utility model;

[0019] Figure 4 It is a structural schematic diagram of the transfer ring, arc-shaped inserting plate and fixing plate of the utility model.

[0020] In the figure: 1. swivel; 2. straightening mechanism; 3. fastening screw; 4. fixing ring; 5. packer tube; 6. connector; 7. connecting cover; 8. connecting outer tube; 9. support frame; 10. support plate; 11. roller; 12. fixing groove; 13. spring; 14. slide; 15. fixing block; 16. adsorption magnet; 17. fixing plate; 18. fixing magnet; 19. socket; 20. threaded hole; 21. arc-shaped insert plate; 22. fixing sleeve; 23. through hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-4The utility model provides a technical solution: an oil well downhole plugging tool, including a packer tube 5, the top and bottom of the packer tube 5 are integrally formed with a connecting head 6, the upper top of the connecting head 6 is provided with a connecting outer tube 8, the bottom of the connecting outer tube 8 is integrally formed with a connecting cover 7, the inner side wall of the connecting cover 7 and the outer side wall of the upper connecting head 6 are screwed, and a straightening mechanism 2 is provided on the outside of the packer tube 5, the straightening mechanism 2 includes a fixing ring 4, two swivels 1, a plurality of arc-shaped plug plates 21, a fixing plate 17, a plurality of fixing blocks 15, a plurality of support frames 9 and a plurality of rollers 11, the inner side wall of the fixing ring 4 and the outer side wall of the packer tube 5 are fixedly connected, the inner side wall of the swivel 1 and the outer side wall of the fixing ring 4 are rotatably connected, the outer side wall of the fixing ring 4 is provided with a plurality of insertion holes 19, the fixing block 15 is inserted into the inside of the insertion hole 19, the inside of the fixing block 15 is provided with a fixing groove 12, the end of the fixing block 15 away from the insertion hole 19 is provided with two slide grooves 14, and the two ends of the support frame 9 are respectively connected to the outer wall of the packer tube 5. The two slide grooves 14 are slidably connected, and a plurality of springs 13 are fixed inside the slide grooves 14. The other end of the spring 13 is fixedly connected to the support frame 9, and the arc plug plate 21 passes through the fixing groove 12. The top and bottom of the arc plug plate 21 are fixedly connected to the opposite sides of the two swivels 1 respectively. Both sides of the roller 11 are rotatably connected with the support plate 10, and the end of the support plate 10 close to the support frame 9 and the side of the support frame 9 away from the fixing block 15 are fixedly connected. The top and bottom of the fixing plate 17 are fixedly connected to the two swivels 1 respectively. A through hole 23 is opened inside the fixing plate 17, and a threaded hole 20 is opened on the outer wall of the fixing ring 4. The fixing ring 4 and the fixing plate 17 are fixedly connected by fastening screws 3. The fixing block 15 is inserted into the inside of the insertion hole 19, and then the swivel 1 is rotated, and the arc plug plate 21 passes through the fixing groove 12, so that the fixing block 15, the support frame 9, the support plate 10 and the roller 11 are fixed. Then the fixing plate 17 and the swivel 1 are fixed by fastening screws 3.

[0023] Furthermore, an adsorption magnetic block 16 is fixed to one end of the fixed block 15 close to the fixed ring 4, and a fixed magnetic block 18 is fixed inside the socket 19. The adsorption magnetic block 16 and the fixed magnetic block 18 are attracted to each other. A plurality of fixed sleeves 22 are fixed to the outer wall of the fixed ring 4. One end of the arc-shaped insert plate 21 passes through the fixed groove 12 and is located inside the fixed sleeve 22. When the fixed block 15 is inserted into the socket 19, the adsorption magnetic block 16 and the fixed magnetic block 18 are attracted to each other, so that the fixed block 15, the support frame 9 and the roller 11 can be adsorbed.

[0024] During operation, the fixing block 15 is inserted into the inside of the socket 19, and then the swivel 1 is rotated. The swivel 1 moves with the arc-shaped insert plate 21, and the arc-shaped insert plate 21 passes through the fixing groove 12, thereby fixing the fixing block 15, the support frame 9, the support plate 10 and the roller 11. Then, the fixing plate 17 and the swivel 1 are fixed by tightening the screws 3. This can prevent the swivel 1 from rotating, causing the arc-shaped insert plate 21 to move out of the fixing groove 12, causing the fixing block 15 and the roller 11 to fall off. When the fixing block 15 is inserted into the inside of the socket 19, the adsorption magnetic block 16 and the fixed magnetic block 18 are attracted to each other, which can adsorb the fixing block 15, the support frame 9 and the roller 11. In this way, the fixing block 15, the support frame 9 and the roller 11 will not fall off when the hand is released, making it convenient for the arc-shaped insert plate 21 to be inserted into the inside of the fixing groove 12.

[0025] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations. The phrase "includes an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A downhole plugging tool for an oil well, comprising a packer tube (5), characterized in that: The top and bottom of the packer tube (5) are integrally formed with a connector (6), an outer connecting tube (8) is provided above the upper connector (6), a connecting cover (7) is integrally formed at the bottom of the outer connecting tube (8), the inner side wall of the connecting cover (7) and the outer side wall of the upper connector (6) are screwed together, and a straightening mechanism (2) is provided on the outside of the packer tube (5), the straightening mechanism (2) comprises a fixing ring (4), two rotating rings (1), a plurality of arc-shaped insert plates (21), a fixing plate (17), a plurality of fixing blocks (15), a plurality of support frames (9) and a plurality of rollers (11).

2. The downhole plugging tool for an oil well according to claim 1, characterized in that: The inner side wall of the fixing ring (4) and the outer side wall of the packer tube (5) are fixedly connected, the inner side wall of the rotating ring (1) and the outer side wall of the fixing ring (4) are rotatably connected, the outer side wall of the fixing ring (4) is provided with a plurality of insertion holes (19), the fixing block (15) is inserted into the interior of the insertion holes (19), and the interior of the fixing block (15) is provided with a fixing groove (12).

3. The downhole plugging tool for an oil well according to claim 2, characterized in that: Two slide grooves (14) are provided at one end of the fixed block (15) away from the insertion hole (19), and the two ends of the support frame (9) are respectively slidably connected to the two slide grooves (14), and a plurality of springs (13) are fixed inside the slide grooves (14), and the other ends of the springs (13) are fixedly connected to the support frame (9), and the arc-shaped insert plate (21) passes through the fixed groove (12).

4. The downhole plugging tool for an oil well according to claim 3, characterized in that: The top and bottom of the arc-shaped insert plate (21) are respectively fixedly connected to the opposite sides of the two rotating rings (1), and both sides of the roller (11) are rotatably connected to the support plate (10), and the end of the support plate (10) close to the support frame (9) is fixedly connected to the side of the support frame (9) away from the fixed block (15).

5. The downhole plugging tool for an oil well according to claim 4, characterized in that: The top and bottom of the fixing plate (17) are fixedly connected to the two rotating rings (1) respectively. A through hole (23) is provided inside the fixing plate (17). A threaded hole (20) is provided on the outer wall of the fixing ring (4). The fixing ring (4) and the fixing plate (17) are fixedly connected by fastening screws (3).

6. The downhole plugging tool for an oil well according to claim 5, characterized in that: An adsorption magnetic block (16) is fixed to one end of the fixed block (15) close to the fixed ring (4), and a fixed magnetic block (18) is fixed inside the insertion hole (19). The adsorption magnetic block (16) and the fixed magnetic block (18) attract each other. A plurality of fixed sleeves (22) are fixed to the outer wall of the fixed ring (4), and one end of the arc-shaped insert plate (21) passes through the fixed groove (12) and is located inside the fixed sleeve (22).

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