Hydraulic reversing mechanism

Abstract

The application provides a hydraulic reversing mechanism, comprising: a first connecting joint, a first flow channel and a mounting channel being in communication with each other are arranged in the first connecting joint; a moving assembly, at least part of the moving assembly is arranged in the mounting channel, the moving assembly is movably arranged along the extension direction of the mounting channel, the moving assembly comprises a second flow channel, the second flow channel is in communication with the first flow channel, the cross-sectional area of the flow cross section of the second flow channel is smaller than that of the first flow channel, and the moving assembly is pushed to move by the liquid in the first flow channel; a reversing assembly, the reversing assembly is in butt joint with the moving assembly and the first connecting joint respectively, the reversing assembly is provided with a third flow channel in communication with the second flow channel, the reversing assembly is movably arranged along the extension direction of the third flow channel and rotatably arranged around a predetermined axis. The application solves the problem that impurities are easily deposited in the hydraulic reversing mechanism in the prior art.

Description

Technical Field

[0001] This invention relates to the field of oil extraction technology, and more specifically, to a hydraulic reversing mechanism. Background Technology

[0002] Coiled tubing equipment is widely used as a "universal work machine" in the oil extraction industry. Due to the inherent characteristics of coiled tubing, it cannot be rotated in the wellbore like casing or drill pipe through a wellhead power device. When running the tubing, the end of the coiled tubing is always on one side of the wellbore due to gravity or tubing deformation. If the end of the coiled tubing happens to hit a protruding step in the wellbore during the running process, it is difficult to change the position of the end of the coiled tubing close to the wellbore by rotating the tubing string because the coiled tubing cannot be rotated. It is also difficult to overcome the obstruction point by lifting and lowering.

[0003] When flushing sand in a well, if a flushing head with a fixed nozzle is used, the nozzle can only flush the fixed cementing well along the coiled tubing, which can easily lead to insufficient flushing. If a flushing tool with a rotating nozzle is used, the rotating nozzle rotates by the reaction force of the liquid flow. The higher the flow rate, the faster the rotation speed. During the flushing operation, the rotating nozzle may rotate too fast, resulting in insufficient liquid flow impact force and reduced flushing effect.

[0004] In the prior art, in order to solve the above-mentioned technical problems, a hydraulic reversing device is designed, which is connected to the upper tube column and the lower tube column respectively. A guide groove is provided on the spindle, and a guide pin is provided on the outer shell. The guide pin is inserted into the guide groove. When the guide pin moves back and forth in the guide groove, the spindle and the outer shell will deflect relative to each other by a certain angle.

[0005] However, due to the small outer diameter of the spindle and the limited space for the distribution of guide grooves, the width of the guide grooves and the number of reversals can only be reduced. This means that the diameter of the guide pin becomes smaller and its strength becomes weaker, and the single reversal angle increases. In addition, during actual use, there are many impurities in the working fluid. When these impurities are deposited in the reversal grooves, they will hinder the relative movement of the guide pins in the guide grooves, causing the device to jam and become unable to reverse. Summary of the Invention

[0006] The main objective of this invention is to provide a hydraulic reversing mechanism to solve the problem of impurity deposition that is easily caused in existing hydraulic reversing mechanisms.

[0007] To achieve the above objectives, the present invention provides a hydraulic reversing mechanism, comprising: a first connecting joint having a first flow channel and an installation channel communicating with each other; a moving component having at least a portion disposed within the installation channel, the moving component being movably disposed along the extension direction of the installation channel, the moving component including a second flow channel communicating with the first flow channel, the cross-sectional area of ​​the second flow channel being smaller than the cross-sectional area of ​​the first flow channel, the moving component being moved by liquid within the first flow channel; and a reversing component docking with the moving component and the first connecting joint, the reversing component having a third flow channel communicating with the second flow channel, the reversing component being movably disposed along the extension direction of the third flow channel and rotatably disposed about a predetermined axis.

[0008] Furthermore, the reversing assembly includes a reversing component, at least a portion of the third flow channel is disposed within the reversing component, and a first guide end face is disposed on the end face of the reversing component near the moving component, the first guide end face being inclined relative to the axis of the reversing component; at least a portion of the moving component is in contact with the first guide end face, the moving component pushes the reversing component to move, and the first guide end face causes the reversing component to rotate.

[0009] Furthermore, a second guide end face is provided on the end face of the first connecting joint. The second guide end face is inclined relative to the axis of the first connecting joint. There are at least two second guide end faces, which are spaced apart circumferentially along the first connecting joint. At least a portion of the first guide end face is in contact with one of the second guide end faces to put the reversing component in the initial position. The other second guide end face guides the reversing component when it moves toward the direction closer to the first connecting joint, and puts the first guide end face in contact with the other second guide end face.

[0010] Furthermore, the end of the reversing component is provided with a plurality of first tooth grooves, which are spaced apart circumferentially along the reversing component; at least a portion of the groove wall surface of the first tooth groove is a first guide end face.

[0011] Furthermore, the end of the first connecting joint is provided with a plurality of second tooth grooves, which extend along the circumferential direction of the first connecting joint, and each first tooth groove meshes with each second tooth groove.

[0012] Furthermore, the movable component includes: an adjustment component disposed within the installation channel and movably disposed along the extension direction of the installation channel, at least a portion of the second flow channel being located within the adjustment component; the end of the adjustment component is provided with a plurality of third tooth grooves, the plurality of third tooth grooves being spaced apart along the circumference of the adjustment component, each third tooth groove being disposed in a one-to-one correspondence with each first tooth groove, and at least a portion of the groove wall surface of the third tooth groove being in contact with the first guide end face.

[0013] Furthermore, a limiting groove is provided on the first connecting joint, and the limiting groove extends along the axial direction of the first connecting joint; a limiting element is provided on the adjusting component, and at least a portion of the limiting element is inserted into the limiting groove.

[0014] Furthermore, the movable component also includes: a throttling element disposed within the installation channel and connected to the adjusting element, at least a portion of the second flow channel being disposed within the throttling element, the throttling element being movably disposed along the extension direction of the installation channel.

[0015] Furthermore, the throttling component has a first step structure at one end near the first flow channel; the installation channel has a second step structure opposite to the first step structure at one end near the adjustment component; the moving component also includes: a first elastic component, sleeved on the throttling component, one end of the first elastic component abutting against the first step end face of the first step structure, and the other end abutting against the second step end face of the second step structure.

[0016] Furthermore, the reversing component has a third step structure at the end near the moving component. The hydraulic reversing mechanism also includes: a locking joint with a through-channel inside, the end of the reversing component away from the moving component passing through the through-channel, and the third step end face of the third step structure facing the locking joint; and a second elastic component sleeved on the reversing component, one end of the second elastic component abutting against the third step end face, and the other end of the second elastic component abutting against the end face of the locking joint.

[0017] According to the technical solution of the present invention, the hydraulic reversing mechanism includes a first connecting joint, a moving component, and a reversing component. The first connecting joint has a first flow channel and an installation channel that are interconnected. At least a portion of the moving component is disposed in the installation channel. The moving component is movably disposed along the extension direction of the installation channel. The moving component includes a second flow channel that is connected to the first flow channel. The cross-sectional area of ​​the flow section of the second flow channel is smaller than that of the flow section of the first flow channel. The moving component is moved by the liquid in the first flow channel. The reversing component is respectively connected to the moving component and the first connecting joint. The reversing component has a third flow channel that is connected to the second flow channel. The reversing component is movably disposed along the extension direction of the third flow channel and rotatably disposed about a predetermined axis. In practical use, the liquid flows within the first, second, and third flow channels inside the first connecting joint. The pressure difference between the first and second flow channels drives the moving component to move. Furthermore, the moving component drives the reversing component to move, and the reversing component rotates during the movement, thus achieving the reversing action. Throughout the process, it is unaffected by the diameter or the content of solid impurities in the liquid inside the well. It uses the pressure difference between the first and second flow channels as the power source, rather than the pressure chamber between the second flow channel and the working environment. This isolates the first, second, and third flow channels from the working environment, preventing impurities in the working environment from entering the hydraulic reversing mechanism and avoiding the accumulation of impurities inside the mechanism. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 A schematic diagram of an embodiment of the hydraulic reversing mechanism according to the present invention is shown;

[0020] Figure 2 A schematic diagram of the moving component of the hydraulic reversing mechanism according to the present invention is shown;

[0021] Figure 3 A schematic diagram of the reversing assembly of the hydraulic reversing mechanism according to the present invention is shown;

[0022] Figure 4 A diagram showing the extended state of the adjusting component of the hydraulic reversing mechanism according to the present invention is provided.

[0023] Figure 5 An initial state diagram of the adjustment components of the hydraulic reversing mechanism according to the present invention is shown;

[0024] Figure 6 A schematic diagram showing the initial engagement of the first connecting joint and the reversing component of the hydraulic reversing mechanism according to the present invention is provided.

[0025] Figure 7 A schematic diagram of the engagement between the first connecting joint and the reversing component in the first viewpoint is shown in the case of the hydraulic reversing mechanism according to the present invention in the case of the adjustment component being extended.

[0026] Figure 8 A front view of the first connecting joint engaging with the adjusting component in the extended state of the hydraulic reversing mechanism according to the present invention is shown;

[0027] Figure 9 A schematic diagram of the structure of the first tooth groove of the reversing component in the hydraulic reversing mechanism according to the present invention is shown;

[0028] Figure 10 A schematic diagram of the engagement between the first connecting joint and the reversing component in the second view is shown in the case of the hydraulic reversing mechanism according to the present invention in the case of the adjustment component being extended.

[0029] The above figures include the following reference numerals:

[0030] 1. First connecting joint; 10. First flow channel; 11. Installation channel; 110. Second step structure; 12. Second guide end face; 13. Second toothed groove; 14. Limiting groove;

[0031] 2. Moving component; 20. Second flow channel; 21. Adjusting component; 22. Third toothed groove; 210. Limiting component; 23. Throttling component; 230. First step structure; 24. First elastic component; 25. Retaining ring;

[0032] 3. Reversing assembly; 30. Third flow channel; 31. Reversing component; 310. Third step structure; 32. First guide end face; 33. First tooth groove;

[0033] 4. Locking joint; 40. Through-hole; 5. Second elastic component; 6. Second connecting joint; 7. Housing. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Please refer to Figures 1 to 10This invention provides a hydraulic reversing mechanism, comprising: a first connecting joint 1, wherein a first flow channel 10 and an installation channel 11 are provided in the first connecting joint 1; a moving component 2, wherein at least a portion of the moving component 2 is disposed in the installation channel 11, the moving component 2 is movably disposed along the extension direction of the installation channel 11, the moving component 2 includes a second flow channel 20, the second flow channel 20 is connected to the first flow channel 10, the cross-sectional area of ​​the flow section of the second flow channel 20 is smaller than the cross-sectional area of ​​the flow section of the first flow channel 10, and the moving component 2 is moved by the liquid in the first flow channel 10; and a reversing component 3, which is respectively connected to the moving component 2 and the first connecting joint 1, wherein the reversing component 3 is provided with a third flow channel 30 connected to the second flow channel 20, the reversing component 3 is movably disposed along the extension direction of the third flow channel 30, and is rotatably disposed about a predetermined axis.

[0036] The hydraulic reversing mechanism provided by the present invention includes a first connecting joint 1, a moving component 2, and a reversing component 3. The first connecting joint 1 is provided with a first flow channel 10 and an installation channel 11 that are interconnected. At least a portion of the moving component 2 is disposed in the installation channel 11. The moving component 2 is movably disposed along the extension direction of the installation channel 11. The moving component 2 includes a second flow channel 20 that is connected to the first flow channel 10. The cross-sectional area of ​​the flow section of the second flow channel 20 is smaller than that of the flow section of the first flow channel 10. The moving component 2 is moved by the liquid in the first flow channel 10. The reversing component 3 is respectively connected to the moving component 2 and the first connecting joint 1. The reversing component 3 is provided with a third flow channel 30 that is connected to the second flow channel 20. The reversing component 3 is movably disposed along the extension direction of the third flow channel 30 and rotatably disposed about a predetermined axis. In practical use, the liquid flows within the first flow channel 10, the second flow channel 20, and the third flow channel 30 inside the first connecting joint 1. The liquid pressure difference between the first flow channel 10 and the second flow channel 20 drives the moving component 2 to move. Furthermore, the moving component 2 drives the reversing component 3 to move. The reversing component 3 rotates during the movement, realizing the reversing action. Throughout the process, it is not affected by the diameter or the content of solid impurities in the liquid inside the well. It uses the liquid pressure difference between the first flow channel 10 and the second flow channel 20 as the power source, instead of using the pressure chamber between the second flow channel 20 and the working environment as the power source. This achieves the isolation of the first flow channel 10, the second flow channel 20, and the third flow channel 30 from the working environment, preventing impurities in the working environment from entering the hydraulic reversing mechanism and avoiding the accumulation of impurities inside the mechanism.

[0037] Specifically, the reversing assembly 3 includes a reversing component 31. At least a portion of the third flow channel 30 is disposed within the reversing component 31. A first guide end face 32 is provided on the end face of the reversing component 31 near the moving component 2. The first guide end face 32 is inclined relative to the axis of the reversing component 31. At least a portion of the moving component 2 is in contact with the first guide end face 32. The moving component 2 pushes the reversing component 31 to move and rotates the reversing component 31 via the first guide end face 32. Thus, while the moving component 2 extends into the mounting channel 11, it pushes the reversing component 31 to move. At this time, since the first guide end face 32 is inclined relative to the axis of the reversing component 31, that is, the extension direction of the first guide end face 32 is the circumferential direction of the reversing component 31, under the mutual blocking action between the moving component 2 and the first guide end face 32, the moving component 2 moves relative to the first guide end face 32 along the extension direction of the first guide end face 32, thereby realizing the rotation of the reversing component 31.

[0038] Furthermore, a second guide end face 12 is provided on the end face of the first connecting joint 1. The second guide end face 12 is inclined relative to the axis of the first connecting joint 1. There are at least two second guide end faces 12, which are spaced apart circumferentially along the first connecting joint 1. At least a portion of the first guide end face 32 is in contact with one of the second guide end faces 12 to position the reversing component 31 in its initial position. The other second guide end face 12 guides the reversing component 31 as it moves toward the first connecting joint 1, and the first guide end face 32 is in contact with the other second guide end face 12. During use, after the moving component 2 pushes out the reversing component 31 and causes it to rotate, the first guide end face 32 and one of the second guide end faces 12 are offset from each other. After the moving component 2 moves toward the initial position, the reversing component 31 moves toward the first connecting joint 1. At this time, the reversing component 31, guided by the other second guide end face 12, cooperates with the first connecting joint 1 to fix it in the rotated position. Preferably, the first guide end face 32 and the second guide end face 12 are inclined in the same direction so that the first guide end face 32 and the second guide end face 12 fit together when the mechanism is not working.

[0039] In practical implementation, the end of the reversing component 31 is provided with a plurality of first toothed grooves 33, which are spaced apart circumferentially along the reversing component 31; at least a portion of the groove wall surface of the first toothed groove 33 is a first guide end face 32. By limiting the number of first guide end faces 32, the rotation angle of the reversing component 31 is limited, and by limiting the inclination direction of the first guide end faces 32, the rotation direction of the reversing component 31 is adjusted. For example, if the reversing component 31 is set to rotate 60° each time, then six first guide end faces 32 are provided.

[0040] The first connecting joint 1 has a plurality of second toothed grooves 13 at its end, which extend along the circumferential direction of the first connecting joint 1. Each first toothed groove 33 meshes with each second toothed groove 13. The meshing between the first toothed grooves 33 and the second toothed grooves 13 fixes the reversing component 31 in a designated position and guides the reversing component 31 during rotation.

[0041] In this application, the movable component 2 includes: an adjustment component 21, which is disposed within the mounting channel 11 and movably disposed along the extension direction of the mounting channel 11, at least a portion of the second flow channel 20 being located within the adjustment component 21; the end of the adjustment component 21 is provided with a plurality of third toothed grooves 22, the plurality of third toothed grooves 22 being disposed at intervals along the circumference of the adjustment component 21, each third toothed groove 22 being disposed in correspondence with each first toothed groove 33, and at least a portion of the groove wall surface of the third toothed groove 22 being in contact with the first guide end face 32. In the initial state, the first tooth groove 33 is engaged with the second tooth groove 13 and the third tooth groove 22 respectively. During use, the adjusting component 21 extends to push the reversing component 31, and the reversing component 31 moves away from the second tooth groove 13. After the reversing component 31 rotates a certain angle, it is offset from the second tooth groove 13. When the adjusting component 21 retracts and the reversing component 31 moves towards the first connecting joint 1, it continues to rotate under the action of the second guide end face 12 in each of the second tooth grooves 13 until it re-engages with the second tooth groove 13.

[0042] Among them, there is a first tooth between two adjacent first tooth grooves 33, a second tooth between two adjacent second tooth grooves 13, and a third tooth between two adjacent third tooth grooves 22. The third tooth grooves 22 and the second tooth grooves 13 are staggered, that is, the bottom surface of the third tooth groove 22 corresponds to the second tooth. When the adjusting component 21 pushes the reversing component 31 to move, the first tooth on the reversing component 31 gradually rotates toward the bottom surface of the third tooth groove 22. At this time, the first tooth groove 33 and the second tooth groove 13 are misaligned. When the adjusting component 21 gradually retracts to the initial position, the first tooth groove 33 and the second tooth groove 13 are misaligned. Then, the reversing component 31 rotates under the action of the second guide end face 12 and gradually makes the first tooth groove 33 mesh with the second tooth groove 13. Specifically, the first connecting joint 1, the adjusting component 21, and the reversing component 31 are all cylindrical. The first connecting joint 1 has a mating end that mates with the reversing component 31. The thickness of the reversing component 31 is greater than the sum of the thicknesses of the first connecting joint 1 and the adjusting component 21, so as to ensure that the first guide end face 32 can contact the inner wall surfaces of the second guide end face 12 and the third tooth groove 22 respectively.

[0043] Furthermore, the first groove 33 includes a first groove wall surface and a second groove wall surface arranged opposite to each other along the circumference of the reversing component 31. The first groove wall surface is a plane and is parallel to the axis of the reversing component 31. At least a portion of the second groove wall surface is a first guide end surface 32.

[0044] In the embodiments provided by the present invention, both the first guide end face 32 and the second guide end face 12 are curved surfaces. This arrangement allows for smoother rotation of the reversing component 31, and the curved first guide end face 32 better conforms to the rotational trend of the reversing component 31. During the design process, the extension trajectories of the multiple first tooth grooves 33 and the multiple second tooth grooves 13 are all along a spiral trajectory, thus forming multiple spiral teeth. The number of spiral lines is related to the reversing angle; for each 60° reversal, 6 spiral lines are set. The spiral lines can be clockwise or counterclockwise.

[0045] In specific implementation, a limiting groove 14 is provided on the first connecting joint 1, extending along the axial direction of the first connecting joint 1; a limiting member 210 is provided on the adjusting component 21, with at least a portion of the limiting member 210 inserted into the limiting groove 14. Through the mutual cooperation between the limiting groove 14 and the limiting member 210, the adjusting component 21 is restricted to moving only along the extension direction of the mounting channel 11 and cannot rotate. Preferably, there are at least two limiting grooves 14, spaced apart circumferentially along the first connecting joint 1, and at least two limiting members 210, each corresponding to one of the at least two limiting grooves 14.

[0046] like Figure 2 As shown, the moving component 2 further includes a throttling component 23, disposed within the mounting channel 11 and connected to the adjusting component 21. At least a portion of the second flow channel 20 is disposed within the throttling component 23, which is movably disposed along the extending direction of the mounting channel 11. During operation, liquid enters from the first flow channel 10 at a certain flow rate, generating a throttling pressure difference during its entry into the second flow channel 20. This pressure difference drives the throttling component 23 to move. The throttling component 23 is threadedly connected to the adjusting component 21, and the throttling component 23 pushes the adjusting component 21 to extend out of the mounting channel 11.

[0047] In the specific implementation process, the throttling component 23 is provided with a first step structure 230 at one end near the first flow channel 10; the installation channel 11 is provided with a second step structure 110 opposite to the first step structure 230 at one end near the adjusting component 21; the moving component 2 also includes: a first elastic component 24, sleeved on the throttling component 23, one end of the first elastic component 24 abutting against the first step end face of the first step structure 230, and the other end abutting against the second step end face of the second step structure 110. Thus, during the downward pushing of the throttling component 23, the first elastic component 24 is compressed. When the liquid stops flowing and the throttling pressure difference disappears, the elastic restoring force of the first elastic component 24 pushes the throttling component 23 back to its initial position. Preferably, the first elastic component 24 is a first spring, a retaining ring 25 is provided on the second step end face, and the other end of the first elastic component 24 abuts against the retaining ring 25.

[0048] Furthermore, such as Figure 3 As shown, the reversing component 31 has a third step structure 310 at one end near the moving component 2. The hydraulic reversing mechanism also includes: a locking connector 4, which has a through-channel 40. The end of the reversing component 31 away from the moving component 2 passes through the through-channel 40, and the third step end face of the third step structure 310 is opposite to the locking connector 4; and a second elastic component 5, which is sleeved on the reversing component 31. One end of the second elastic component 5 abuts against the third step end face, and the other end of the second elastic component 5 abuts against the end face of the locking connector 4. When liquid is introduced, the reversing component 31 moves downward to compress the second elastic component 5. When the throttling pressure difference disappears, the reversing component 31 is pushed back to its initial position by the elastic restoring force of the second elastic component 5. Preferably, the second elastic component 5 is a second spring.

[0049] The hydraulic reversing mechanism also includes a second connecting joint 6 and a housing 7. One end of the second connecting joint 6 is threadedly connected to the reversing component 31, and the other end is connected to the target tool. One end of the housing 7 is connected to the first connecting joint 1, and the other end is connected to the locking joint 4 at the end away from the second connecting joint 6, so as to protect the reversing component 3 and the moving component 2. Even when the adjusting component 21 is pushed out and the reversing component 31 is separated from the first connecting joint 1, impurities in the working environment cannot enter the interior of the mechanism due to the protective effect of the housing 7.

[0050] In practical applications, the outer shell 7 is cylindrical, one end of the first connecting joint 1 is provided with a first threaded section and is threadedly connected to the outer shell 7, one end of the reversing component 3 is directly inserted into the outer shell 7, and the other end passes through the through-passing channel 40 and is threadedly connected to the second connecting joint 6, the outer circumferential surface of the locking joint 4 is provided with a second threaded section, and the outer shell 7 is threadedly connected to the locking joint 4.

[0051] During the lowering of the tubing string, a universal joint is installed between the hydraulic reversing mechanism and the guide shoe. When the lowering of the tubing string encounters obstruction, the universal joint is subjected to axial force and bends to a certain extent. By starting and stopping the pump, the reversing component 31 in the hydraulic reversing mechanism is rotated at a certain angle, and the universal joint rotates accordingly, causing the guide shoe to deflect, thereby avoiding the original tubing string jamming point and ensuring that the tubing string is lowered smoothly.

[0052] In this application, the throttling pressure difference generated between the first flow channel 10 and the second flow channel 20 pushes the adjusting component 21 out, and the third tooth groove 22 pushes the reversing component 31 away from the first connecting joint 1. Without the obstruction of the second tooth groove 13, the groove wall of the first tooth groove 33 rotates along the groove wall of the third tooth groove 22 to the bottom surface of the third tooth groove 22, thereby deflecting at a certain angle so that the first guide end face 32 aligns with another second guide end face 12. When the liquid in the tool stops flowing, the adjusting component 21 retracts into the installation channel 11 under the action of the first elastic component 24, and the reversing component 31 resets under the action of the second elastic component 5. At this time, under the guidance of the second guide end face 12, the reversing component 31 rotates until the first tooth moves to the bottom surface of the second tooth groove 13, until the first tooth groove 33 and the second tooth groove 13 are fully engaged, completing one rotation reversal.

[0053] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0054] The hydraulic reversing mechanism provided by the present invention includes a first connecting joint 1, a moving component 2, and a reversing component 3. The first connecting joint 1 is provided with a first flow channel 10 and an installation channel 11 that are interconnected. At least a portion of the moving component 2 is disposed in the installation channel 11. The moving component 2 is movably disposed along the extension direction of the installation channel 11. The moving component 2 includes a second flow channel 20 that is connected to the first flow channel 10. The cross-sectional area of ​​the flow section of the second flow channel 20 is smaller than that of the flow section of the first flow channel 10. The moving component 2 is moved by the liquid in the first flow channel 10. The reversing component 3 is respectively connected to the moving component 2 and the first connecting joint 1. The reversing component 3 is provided with a third flow channel 30 that is connected to the second flow channel 20. The reversing component 3 is movably disposed along the extension direction of the third flow channel 30 and rotatably disposed about a predetermined axis. In practical use, the liquid flows within the first flow channel 10, the second flow channel 20, and the third flow channel 30 inside the first connecting joint 1. The liquid pressure difference between the first flow channel 10 and the second flow channel 20 drives the moving component 2 to move. Furthermore, the moving component 2 drives the reversing component 3 to move. The reversing component 3 rotates during the movement, realizing the reversing action. Throughout the process, it is not affected by the diameter or the content of solid impurities in the liquid inside the well. It uses the liquid pressure difference between the first flow channel 10 and the second flow channel 20 as the power source, instead of using the pressure chamber between the second flow channel 20 and the working environment as the power source. This achieves the isolation of the first flow channel 10, the second flow channel 20, and the third flow channel 30 from the working environment, preventing impurities in the working environment from entering the hydraulic reversing mechanism and avoiding the accumulation of impurities inside the mechanism.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hydraulic reversing mechanism, characterized in that, include: The first connecting joint (1) is provided with a first flow channel (10) and an installation channel (11) that are interconnected. A movable component (2) is provided at least in the mounting channel (11). The movable component (2) is movably provided along the extension direction of the mounting channel (11). The movable component (2) includes a second flow channel (20) which communicates with the first flow channel (10). The cross-sectional area of ​​the flow section of the second flow channel (20) is smaller than that of the flow section of the first flow channel (10). The movable component (2) is moved by the liquid in the first flow channel (10). A reversing assembly (3) is connected to the moving assembly (2) and the first connecting joint (1) respectively. The reversing assembly (3) is provided with a third flow channel (30) that communicates with the second flow channel (20). The reversing assembly (3) is movably arranged along the extension direction of the third flow channel (30) and rotatably arranged around a predetermined axis. The moving assembly (2) pushes the reversing assembly (3) to move. The reversing assembly (3) rotates during the movement to realize the reversing action. The moving component (2) includes: A throttling component (23) is disposed within the mounting channel (11), at least a portion of the second flow channel (20) is disposed within the throttling component (23), and the throttling component (23) is movably disposed along the extension direction of the mounting channel (11).

2. The hydraulic reversing mechanism according to claim 1, characterized in that, The reversing assembly (3) includes a reversing component (31), at least a portion of the third flow channel (30) is disposed within the reversing component (31), and a first guide end face (32) is disposed on the end face of the reversing component (31) near the moving assembly (2), and the first guide end face (32) is inclined relative to the axis of the reversing component (31). At least a portion of the moving component (2) is in contact with the first guide end face (32), and the moving component (2) pushes the reversing component (31) to move and the first guide end face (32) causes the reversing component (31) to rotate.

3. The hydraulic reversing mechanism according to claim 2, characterized in that, A second guide end face (12) is provided on the end face of the first connecting joint (1). The second guide end face (12) is inclined relative to the axis of the first connecting joint (1). There are at least two second guide end faces (12). The at least two second guide end faces (12) are arranged at intervals along the circumference of the first connecting joint (1). At least a portion of the first guide end face (32) is in contact with one of the second guide end faces (12) so that the reversing component (31) is in the initial position. The reversing component (31) is guided by another second guide end face (12) as it moves toward the first connecting joint (1), and the first guide end face (32) is made to fit against the other second guide end face (12).

4. The hydraulic reversing mechanism according to claim 3, characterized in that, The end of the reversing component (31) is provided with a plurality of first tooth grooves (33), and the plurality of first tooth grooves (33) are arranged at intervals along the circumference of the reversing component (31). At least a portion of the groove wall surface of the first tooth groove (33) is the first guide end face (32).

5. The hydraulic reversing mechanism according to claim 4, characterized in that, The end of the first connecting joint (1) is provided with a plurality of second tooth grooves (13), the plurality of second tooth grooves (13) extend along the circumferential direction of the first connecting joint (1), and each of the first tooth grooves (33) and each of the second tooth grooves (13) mesh with each other.

6. The hydraulic reversing mechanism according to claim 4, characterized in that, The moving component (2) includes: An adjustment component (21) is disposed within the mounting channel (11) and movably disposed along the extending direction of the mounting channel (11), wherein at least a portion of the second flow channel (20) is located within the adjustment component (21); The end of the adjusting component (21) is provided with a plurality of third tooth grooves (22), the plurality of third tooth grooves (22) are arranged at intervals along the circumference of the adjusting component (21), each third tooth groove (22) is arranged in correspondence with each first tooth groove (33), and at least a portion of the groove wall surface of the third tooth groove (22) is in contact with the first guide end face (32).

7. The hydraulic reversing mechanism according to claim 6, characterized in that, The first connecting joint (1) is provided with a limiting groove (14), which extends along the axial direction of the first connecting joint (1); The adjustment component (21) is provided with a limiting member (210), at least a portion of which is inserted into the limiting groove (14).

8. The hydraulic reversing mechanism according to claim 6, characterized in that, The throttling component (23) is connected to the adjusting component (21).

9. The hydraulic reversing mechanism according to claim 8, characterized in that, The throttling component (23) has a first step structure (230) at one end near the first flow channel (10); the installation channel (11) has a second step structure (110) opposite to the first step structure (230) at one end near the adjusting component (21); the moving component (2) further includes: The first elastic component (24) is sleeved on the throttling component (23). One end of the first elastic component (24) abuts against the first step end face of the first step structure (230), and the other end abuts against the second step end face of the second step structure (110).

10. The hydraulic reversing mechanism according to claim 2, characterized in that, The reversing component (31) has a third step structure (310) at one end near the moving component (2), and the hydraulic reversing mechanism further includes: Locking connector (4), the locking connector (4) is provided with a through channel (40), the reversing component (31) is disposed at one end away from the moving component (2) in the through channel (40), and the third step end face of the third step structure (310) is opposite to the locking connector (4); The second elastic component (5) is sleeved on the reversing component (31). One end of the second elastic component (5) abuts against the end face of the third step, and the other end of the second elastic component (5) abuts against the end face of the locking connector (4).

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