Lifting-unblocking expanding type crossing packer capable of washing well

Abstract

The utility model relates to the technical field of oil and gas well completion, in particular to a lifting and unblocking expanding type crossing packer capable of washing a well, which comprises a backwashing module, a hydraulic control pipeline crossing module and a packer module, a first backwashing channel, a second backwashing channel and a third backwashing channel are arranged on the backwashing module, the hydraulic control pipeline crossing module and the packer module in a communicating mode, the hydraulic control pipeline crossing module comprises a hydraulic control connector, a first outer sleeve, a plurality of hydraulic control channels and a plurality of preset pipelines, and locking nuts are arranged at the two ends of each hydraulic control channel. The device can be applied to a conventional cased well and a casing deformation well, the rubber sleeve is recycled and unsealed in an upward lifting and unsealing mode, the rubber sleeve can be taken out of the casing deformation well smoothly, aiming at intelligent well completion, through a hydraulic control pipeline penetrating module, underground tool opening and closing actions can be controlled through ground equipment pressing, and when oil and gas production reaches the later stage, the oil and gas production efficiency is improved. When the interior of the production channel is scaled and blocked, the backwashing module can be started through annular pressurization to wash the well.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas well completion, in particular to an expandable through packer that can be released by pulling up and can be washed well. Background Art

[0002] With the development of the oil and gas industry, intelligent well completion has gradually replaced the existing well completion methods and become the future development trend of well completion. Therefore, existing tools need to have through holes to facilitate the control of downhole tool actions after the cable or pipeline passes through.

[0003] Due to the complex oil and gas well conditions, there are not only conventional casing wells, but also many casing deformation wells that need to be completed. The expansion of conventional compression packers is relatively small and cannot meet the requirements of casing deformation wells. At the same time, in the later stage of oil and gas production, the inside of the tubing is prone to blockage, reducing the recovery efficiency and increasing the production cost. In summary, it is necessary to develop a packer that is suitable for intelligent well completion, has a well washing function, and has a wide application range. Summary of the Utility Model

[0004] In view of this, the purpose of the present utility model is to provide an expandable through packer that can be released by pulling up and can be washed well to solve the problems raised in the above background art.

[0005] Based on the above purpose, the present utility model provides an expandable through packer that can be released by pulling up and can be washed well, including a backwashing module, a hydraulic control pipeline through module, and a packer module. The backwashing module, the hydraulic control pipeline through module, and the packer module are all communicated with a first backwashing channel, a second backwashing channel, and a third backwashing channel. The hydraulic control pipeline through module includes:

[0006] A hydraulic control joint, one end of which is sleeved on the lower backwashing joint on the backwashing module, and the other end is sleeved on the inner central pipe on the packer module. The hydraulic control joint is threadedly connected to the lower backwashing joint, and the outer wall of the hydraulic control joint is threadedly connected to the inner wall of the middle joint on the packer module. A plurality of uniformly distributed second backwashing channels are provided through the inner wall and the outer wall at a position of the hydraulic control joint close to the middle joint;

[0007] A first outer sleeve, sleeved on the outer wall of the hydraulic control joint, the first outer sleeve is slidably connected to the hydraulic control joint, and one end of the first outer sleeve abuts against the middle joint;

[0008] A plurality of hydraulic control channels, arranged in a staggered manner with all the second backwashing channels. Both ends of each hydraulic control channel are respectively communicated with both ends of the hydraulic control joint, and locking nuts are installed at both ends of each hydraulic control channel;

[0009] A plurality of pre-set pipelines, all arranged in the backwashing channels on the packer module, and one end of each pre-set pipeline is respectively communicated with the locking nut.

[0010] Preferably, the backwashing module includes:

[0011] A backwashing central pipe, at one end of which is inserted a backwashing upper joint. A plurality of first liquid inlet holes are provided on the backwashing central pipe. A plurality of connection channels are provided along the axial direction at the bottom of the backwashing upper joint, and each of the connection channels is respectively communicated with the first liquid inlet hole;

[0012] A backwashing lower joint, sleeved on the backwashing central pipe. One end of the backwashing lower joint is threadedly connected to the backwashing upper joint, and the other end is threadedly connected to a liquid control joint. A first backwashing channel is provided in the backwashing lower joint. The first backwashing channel is communicated with all the connection channels. One end of the first backwashing channel far from the backwashing upper joint is communicated with the outer wall of the backwashing lower joint to be provided with a plurality of second liquid inlet holes, and a first clamping wall cavity is provided between the backwashing lower joint and the backwashing central pipe;

[0013] A backwashing valve sleeve, arranged in the first backwashing channel. A plurality of third liquid inlet holes penetrating through the inner wall of the backwashing lower joint and communicated with the clamping wall cavity are provided on the backwashing valve sleeve;

[0014] A backwashing valve core, slidably arranged inside the backwashing valve sleeve.

[0015] Preferably, a plurality of uniformly distributed pipeline grooves are provided on the outer wall of the backwashing lower joint. At least one first pressing plate is sleeved on the outer wall of the backwashing lower joint, and the first pressing plate is fixed to the backwashing lower joint by fastening screws.

[0016] Preferably, the packer module includes:

[0017] An inner central pipe, at one end of which is inserted into the inside of the liquid control joint, and at the other end is provided with a backwashing mechanism. A liquid control pipeline track groove for a preset pipeline to pass through is provided along the axial direction on the outer wall of the inner central pipe;

[0018] A middle joint, sleeved on the inner central pipe. One end of the middle joint is threadedly connected to the liquid control joint, and the other end is threadedly connected to an outer central pipe. One end of the outer central pipe is fixedly connected to the backwashing mechanism, and a second clamping cavity wall is formed between the inner central pipe, the middle joint and the outer central pipe;

[0019] A setting mechanism, sleeved on the middle joint and the outer central pipe, and one end of the setting mechanism is fixedly connected to the middle joint.

[0020] Preferably, the setting mechanism includes:

[0021] A second outer sleeve, sleeved on the middle joint. One end of the second outer sleeve is fixedly connected to the middle joint by a releasing screw, and the other end is threadedly connected to a sealing joint;

[0022] One-way valve, sleeved on the outer central tube, and one end of the one-way valve abuts against a place inside the sealing joint;

[0023] Check spring, sleeved on the outer central tube, one end of the check spring abuts against the one-way valve, and the other end abuts against a reducing joint, and the reducing joint is threadedly connected to one end of the sealing joint away from the second outer sleeve;

[0024] Rubber barrel, sleeved on the outer central tube, one end of the rubber barrel is threadedly connected to one end of the reducing joint away from the check spring, and the other end is threadedly connected with a sliding joint, and the sliding joint is slidably connected to the outer central tube;

[0025] A plurality of installation grooves are uniformly arranged on the outer wall of the middle joint. Each installation groove is communicated with the inner wall of the middle joint to be provided with a liquid outlet hole. A hydraulic baffle is slidably connected in each installation groove. Each hydraulic baffle is provided with a groove. A pressing plate is arranged in each groove. Both ends of each pressing plate are fixedly connected to the middle joint through fastening screws.

[0026] Preferably, the backwashing mechanism includes:

[0027] Positioning joint, sleeved on the outer central tube, and the positioning joint is threadedly connected to the outer central tube;

[0028] Upper suspension head, sleeved on the positioning joint, one end of the upper suspension head abuts against one end of the positioning joint, and the other end is threadedly connected with a lower suspension head;

[0029] Packer lower joint, sleeved on the inner central tube, a place on the outer wall of the packer lower joint is sleeved on the outer central tube and abuts against one end of the positioning joint, and the outer wall of the packer lower joint is threadedly connected to the inner wall of the lower suspension head;

[0030] The third backwashing channel is arranged on the packer lower joint, the third backwashing channel is communicated with the second clamping cavity wall, and the preset pipeline passes through the third backwashing channel.

[0031] The beneficial effects of the present invention: The present invention is a packer with a wide range of application occasions. It can not only be applied to conventional casing wells, but also be suitable for casing deformation wells. The packer adopts the method of lifting to release to recover and release the rubber barrel, and can be smoothly taken out from the casing deformation well; for intelligent completion, through the hydraulic control pipeline crossing module, it can realize the control of the opening and closing actions of downhole tools by pressurizing on the ground equipment; when the oil and gas production reaches the later stage and the production channel is blocked by scaling inside, the annulus can be pressurized to start the backwashing module to wash the well. Description of the Drawings

[0032] To more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only those of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 Schematic diagram of the first part of an expandable through packer with upward release and wash - well function according to an embodiment of the present utility model;

[0034] Figure 2 Schematic diagram of the second part of an expandable through packer with upward release and wash - well function according to an embodiment of the present utility model;

[0035] Figure 3 Schematic diagram of the structure of the back - wash module according to an embodiment of the present utility model;

[0036] Figure 4 Schematic diagram of the structure of the hydraulic pipeline through - module according to an embodiment of the present utility model;

[0037] Figure 5 According to an embodiment of the present utility model Figure 4 Schematic diagram of the cross - sectional structure at A - A;

[0038] Figure 6 Schematic diagram of the setting mechanism of the packer module according to an embodiment of the present utility model;

[0039] Figure 7 Schematic diagram of the back - wash mechanism of the packer module according to an embodiment of the present utility model;

[0040] Figure 8 Schematic diagram of the three - dimensional structure of the pressing plate according to an embodiment of the present utility model;

[0041] Figure 9 Schematic diagram of the three - dimensional structure of the hydraulic baffle according to an embodiment of the present utility model.

[0042] The marks in the figure are:

[0043] 1. Backwash module; 2. Hydraulic control pipeline crossing module; 3. Packer module; 4. Backwash upper joint; 5. Backwash center pipe; 6. Backwash lower joint; 7. Pipeline pressure plate; 8. Backwash valve sleeve; 9. Backwash valve core; 10. First liquid inlet hole; 11. Pipeline groove; 12. Second liquid inlet hole; 13. Hydraulic control joint; 14. First outer sleeve; 15. Locking nut; 16. Pre-set pipeline; 17. Inner center pipe; 18. Unsealing screw; 19. Second outer sleeve; 20. Pressure plate; 21. Hydraulic baffle; 22. Fastening screws; 23. Middle joint; 24. Outer center tube; 25. Sealing joint; 26. One-way valve; 27. Check spring; 28. Variable joint; 29. ​​Rubber cylinder; 30. Sliding joint; 31. Upper hanging head; 32. Positioning joint; 33. Isolation lower joint; 34. Lower hanging head; 35. First backwash channel; 36. Second backwash channel; 37. Third backwash channel; 38. Hydraulic control channel. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0045] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] like Figures 1 to 9 As shown, an expandable cross-over packer for lifting and unsealing a washable well comprises a backwash module 1, a hydraulic control pipeline cross-over module 2 and a packer module 3. The backwash module 1, the hydraulic control pipeline cross-over module 2 and the packer module 3 are all connected with a first backwash channel 35, a second backwash channel 36 and a third backwash channel 37. The hydraulic control pipeline cross-over module 2 comprises:

[0047] The hydraulic control joint 13 has one end sleeved on the backwashing lower joint 6 on the backwashing module 1, and the other end sleeved on the inner central tube 17 on the packer module 3. The hydraulic control joint 13 is threadedly connected to the backwashing lower joint 6, and the outer wall of the hydraulic control joint 13 is threadedly connected to the inner wall of the middle joint 23 on the packer module 3. At a position of the hydraulic control joint 13 close to the middle joint 23, a plurality of uniformly distributed second backwashing channels 36 are provided through the inner wall and the outer wall;

[0048] The first outer sleeve 14 is sleeved on the outer wall of the hydraulic control joint 13. The first outer sleeve 14 is slidably connected to the hydraulic control joint 13, and one end of the first outer sleeve 14 abuts against the middle joint 23;

[0049] A plurality of hydraulic control channels 38 are arranged in an interleaved manner with all the second backwashing channels 36. Both ends of each hydraulic control channel 38 are communicated with both ends of the hydraulic control joint 13, and locking nuts 15 are installed at both ends of each hydraulic control channel 38;

[0050] A plurality of preset pipelines 16 are all arranged in the backwashing channels on the packer module 3, and one end of each preset pipeline 16 is respectively communicated with the locking nut 15.

[0051] For example, the present utility model is a packer with a wide range of applications, which can be applied not only to conventional casing wells but also to casing deformation wells. The packer uses the method of lifting to release and recover the rubber barrel 29, and can be smoothly taken out from the casing deformation well. For intelligent completion, through the hydraulic control pipeline passing through the module 2, the on-off action of downhole tools can be controlled by pressurizing on the ground equipment. When the oil and gas production reaches the later stage and the production channel is blocked by scale, the backwashing module 1 can be started by annular pressure to wash the well. During the lowering process, the tubing is used to carry it down. The hydraulic control pipeline is connected to the hydraulic control joint 13, passes through the backwashing module 1, and is connected to the ground control equipment; the preset pipeline 16 is connected to the hydraulic control joint 13, passes through the packer module 3, and is connected to the lower pipeline.

[0052] As an optional embodiment, the backwashing module 1 includes:

[0053] The backwashing central tube 5 has a backwashing upper joint 4 inserted at one end. A plurality of first liquid inlet holes 10 are provided on the backwashing central tube 5. A plurality of connection channels are provided along the axial direction at the bottom of the backwashing upper joint 4, and each connection channel is respectively communicated with the first liquid inlet hole 10;

[0054] The backwashing lower adapter 6 is sleeved on the backwashing central pipe 5. One end of the backwashing lower adapter 6 is threadedly connected to the backwashing upper adapter 4, and the other end is threadedly connected to the hydraulic control adapter 13. A first backwashing channel 35 is provided inside the backwashing lower adapter 6. The first backwashing channel 35 communicates with all the connection channels. One end of the first backwashing channel 35 away from the backwashing upper adapter 4 communicates with the outer wall of the backwashing lower adapter 6 and is provided with a plurality of second liquid inlet holes 12. And a first sandwich cavity is provided between the backwashing lower adapter 6 and the backwashing central pipe 5;

[0055] The backwashing valve sleeve 8 is arranged inside the first backwashing channel 35. The backwashing valve sleeve 8 is provided with a plurality of third liquid inlet holes penetrating through the inner wall of the backwashing lower adapter 6 and communicating with the sandwich cavity;

[0056] The backwashing valve core 9 is slidably arranged inside the backwashing valve sleeve 8.

[0057] As an optional embodiment, a plurality of uniformly distributed pipeline grooves 11 are provided on the outer wall of the backwashing lower adapter 6. At least one first pressing plate 20 is sleeved on the outer wall of the backwashing lower adapter 6, and the first pressing plate 20 is fixed to the backwashing lower adapter 6 by fastening screws 22.

[0058] For example, during the lowering process, it is carried and lowered using the tubing. Among them, the hydraulic control pipeline is connected to the hydraulic control adapter 13, passes through the pipeline groove 11 of the backwashing lower adapter 6, and is connected to the ground control equipment; the preset pipeline 16 is connected to the hydraulic control adapter 13, passes through the holes and grooves in the circumferential direction of the inner central pipe 17, passes out from the packer module 3, and is then connected to the lower pipeline; during the setting process, the liquid inside the backwashing module 1 passes through the backwashing central pipe 5 and enters the inside of the backwashing upper adapter 4 and the backwashing lower adapter 6 in sequence. At this time, the backwashing valve core 9 closes the first backwashing channel 35; during the backwashing process, the oil casing is pressured. The backwashing liquid enters from the second liquid inlet hole 12 on the backwashing lower adapter 6, pushes the backwashing valve core 9 in the direction away from the second liquid inlet hole 12, and opens the first backwashing channel 35; after the backwashing liquid enters the first backwashing channel 35, it passes through the first sandwich cavity and the second backwashing channel 36 in sequence, and finally returns from the third backwashing channel 37 to complete the flow of the backwashing liquid.

[0059] As an optional embodiment, the packer module 3 includes:

[0060] The inner central pipe 17, one end of which is inserted into the inside of the hydraulic control adapter 13, the other end is provided with a backwashing mechanism, and a hydraulic control pipeline track groove for the preset pipeline 16 to pass through is provided on the outer wall of the inner central pipe 17 along the axial direction;

[0061] The middle joint 23 is sleeved on the inner central tube 17. One end of the middle joint 23 is threadedly connected to the hydraulic control joint 13, and the other end is threadedly connected with an outer central tube 24. One end of the outer central tube 24 is fixedly connected to the backwashing mechanism, and a second clamping cavity wall is formed between the inner central tube 17, the middle joint 23 and the outer central tube 24;

[0062] The setting mechanism is sleeved on the middle joint 23 and the outer central tube 24, and one end of the setting mechanism is fixedly connected to the middle joint 23.

[0063] As an optional embodiment, the setting mechanism includes:

[0064] A second outer sleeve 19 is sleeved on the middle joint 23. One end of the second outer sleeve 19 is fixedly connected to the middle joint 23 through a releasing screw 18, and the other end is threadedly connected with a sealing joint 25;

[0065] A check valve 26 is sleeved on the outer central tube 24, and one end of the check valve 26 abuts against a place inside the sealing joint 25;

[0066] A check spring 27 is sleeved on the outer central tube 24. One end of the check spring 27 abuts against the check valve 26, and the other end abuts against a reducing joint 28. The reducing joint 28 is threadedly connected to the end of the sealing joint 25 away from the second outer sleeve 19;

[0067] A rubber cylinder 29 is sleeved on the outer central tube 24. One end of the rubber cylinder 29 is threadedly connected to the end of the reducing joint 28 away from the check spring 27, and the other end is threadedly connected with a sliding joint 30. The sliding joint 30 is slidably connected to the outer central tube 24;

[0068] A plurality of installation grooves are evenly arranged on the outer wall of the middle joint 23. Each installation groove is communicated with the inner wall of the middle joint 23 and provided with a liquid outlet hole. A hydraulic baffle 21 is slidably connected in each installation groove. Each hydraulic baffle 21 is provided with a groove, and a pressing plate 20 is arranged in each groove. Both ends of each pressing plate 20 are fixedly connected to the middle joint 23 through fastening screws 22.

[0069] As an optional embodiment, the backwashing mechanism includes:

[0070] A positioning joint 32 is sleeved on the outer central tube 24, and the positioning joint 32 is threadedly connected to the outer central tube 24;

[0071] An upper suspension head 31 is sleeved on the positioning joint 32. One end of the upper suspension head 31 abuts against one end of the positioning joint 32, and the other end is threadedly connected with a lower suspension head 34;

[0072] The lower packer sub 33 is sleeved on the inner central pipe 17. One part on the outer wall of the lower packer sub 33 is sleeved on the outer central pipe 24 and abuts against one end of the locating sub 32, and the outer wall of the lower packer sub 33 is threadedly connected to the inner wall of the lower hanger head 34;

[0073] The third backwashing channel 37 is arranged on the lower packer sub 33. The third backwashing channel 37 is communicated with the second clamping cavity wall, and the pre - installed pipeline 16 passes through the third backwashing channel 37.

[0074] For example, during the setting process of the packer module 3, the hydraulic baffle 21 is first activated to fit with the second outer sleeve 19 to protect the releasing screw 18 from being sheared; then the one - way valve 26 and the check spring 27 are opened to set the packer rubber 29. The releasing process relies on the friction between the packer rubber 29 and the casing to fix. The tubing string is lifted to shear the releasing screw 18, and then the tubing string is continuously lifted. The sliding joint 30 disengages from the sealing surface of the outer central pipe 24, the internal pressure of the packer rubber 29 is released, and the rubber position disengages from the casing and is recovered, completing the release of the packer.

[0075] The working principle of the present utility model is as follows: During the lowering process, it is lowered using the tubing. The hydraulic control pipeline is connected to the hydraulic control joint 13, passes through the pipeline groove 11 of the backwashing lower sub 6, and is connected to the ground control equipment; the pre - installed pipeline 16 is connected to the hydraulic control joint 13, passes through the holes and grooves in the circumferential direction of the inner central pipe 17, passes out from the lower packer sub 33, and is then connected to the lower pipeline.

[0076] During the setting process, the liquid inside the backwashing module 1 sequentially enters the inside of the backwashing upper sub 4 and the backwashing lower sub 6 through the backwashing central pipe 5, and the first backwashing channel 35 is closed by pushing the backwashing spool 9; during the setting process of the packer module 3, the hydraulic baffle 21 is first activated to fit with the second outer sleeve 19 to protect the releasing screw 18 from being sheared; then the one - way valve 26 and the check spring 27 are opened to set the packer rubber 29.

[0077] During the backwashing process, pressure is applied to the oil - casing. The backwashing liquid enters from the second liquid inlet hole 12 on the backwashing lower sub 6, pushes the backwashing spool 9 in the direction away from the liquid inlet hole, and opens the first backwashing channel 35; after the backwashing liquid enters the first backwashing channel 35, it sequentially passes through the first clamping wall cavity, the second backwashing channel 36 and the second clamping wall cavity, and finally returns from the third backwashing channel 37, completing the flow of the backwashing liquid.

[0078] The releasing process relies on the friction between the packer rubber 29 and the casing to fix. The tubing string is lifted to shear the releasing screw 18, and then the tubing string is continuously lifted. The sliding joint 30 disengages from the sealing surface of the outer central pipe 24, the internal pressure of the packer rubber 29 is released, and the rubber position disengages from the casing and is recovered, completing the release of the packer.

[0079] The backwashing module 1 is connected to the hydraulic control joint 13 by threads. The length of the backwashing lower joint 6 or the tubing nipple can be selectively designed to lift the second liquid inlet hole 12 of the backwashing module 1 to a position away from the rubber barrel 29, preventing impurities near the rubber barrel 29 from depositing and blocking the backwashing channel hole.

[0080] The inner central tube 17 in the packer module 3 is designed with a hydraulic control pipeline track groove. The hydraulic control joint 13 and the inside of the lower joint are designed with anti-rotation grooves, and anti-rotation keys are designed at both ends of the inner central tube 17 to prevent the hydraulic control pipeline from being entangled during well flushing and running-in.

[0081] As an expandable packer, the utility model can meet the usage requirements of both conventional casing wells and casing deformation wells at the same time; on this basis, a hydraulic control pipeline crossing module 2 is added, which has multiple crossing holes to realize the on-ground control of the opening and closing actions of multiple downhole tools; in the later stage of oil and gas production, when the inside of the tubing is scaled and blocked, the backwashing module 1 can be activated by pressurizing the annulus between the tubing and the casing to achieve the purpose of well flushing; a reliable lifting and releasing method is adopted, and the tool can be released by over-lifting the pipe string.

[0082] Those of ordinary skill in the art should understand that the discussion of any above embodiment is only exemplary, and is not intended to imply that the scope of the utility model is limited to these examples; under the idea of the utility model, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the utility model as described above, which are not provided in detail for the sake of brevity. Any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An expandable cross-over packer for lifting and unsealing a washable well, comprising a backwash module (1), a hydraulic control pipeline cross-over module (2) and a packer module (3), wherein the backwash module (1), the hydraulic control pipeline cross-over module (2) and the packer module (3) are all connected and provided with a first backwash channel (35), a second backwash channel (36) and a third backwash channel (37), characterized in that: The hydraulic control pipeline crossing module (2) includes: A hydraulic control joint (13), one end of which is sleeved on the backwashing lower joint (6) on the backwashing module (1), and the other end is sleeved on the inner central pipe (17) on the packer module (3). The hydraulic control joint (13) is threadedly connected to the backwashing lower joint (6), and the outer wall of the hydraulic control joint (13) is threadedly connected to the inner wall of the middle joint (23) on the packer module (3). A plurality of uniformly distributed second backwashing channels (36) are provided through the inner and outer walls at a position of the hydraulic control joint (13) close to the middle joint (23); A first outer sleeve (14) is sleeved on the outer wall of the hydraulic control joint (13). The first outer sleeve (14) is slidably connected to the hydraulic control joint (13), and one end of the first outer sleeve (14) abuts against the middle joint (23); A plurality of hydraulic control channels (38) are arranged in a staggered manner with all the second backwashing channels (36). Both ends of each hydraulic control channel (38) are respectively communicated with both ends of the hydraulic control joint (13), and locking nuts (15) are installed at both ends of each hydraulic control channel (38); A plurality of preset pipelines (16) are all arranged in the backwashing channels on the packer module (3), and one end of each preset pipeline (16) is respectively communicated with the locking nut (15).

2. The expandable through packer capable of lifting and unsealing and washing well according to claim 1, wherein The backwashing module (1) includes: A backwashing central pipe (5), one end of which is inserted with a backwashing upper joint (4). A plurality of first liquid inlet holes (10) are provided on the backwashing central pipe (5). A plurality of connecting channels are provided along the axial direction at the bottom of the backwashing upper joint (4), and each connecting channel is respectively communicated with the first liquid inlet hole (10); A backwashing lower joint (6) is sleeved on the backwashing central pipe (5). One end of the backwashing lower joint (6) is threadedly connected to the backwashing upper joint (4), and the other end is threadedly connected to the hydraulic control joint (13). A first backwashing channel (35) is provided in the backwashing lower joint (6). The first backwashing channel (35) is communicated with all the connecting channels. One end of the first backwashing channel (35) far from the backwashing upper joint (4) is communicated with the outer wall of the backwashing lower joint (6) to be provided with a plurality of second liquid inlet holes (12), and a first sandwich cavity is provided between the backwashing lower joint (6) and the backwashing central pipe (5); A backwashing valve sleeve (8) is arranged in the first backwashing channel (35). A plurality of third liquid inlet holes penetrating the inner wall of the backwashing lower joint (6) and communicated with the sandwich cavity are provided on the backwashing valve sleeve (8); A backwashing valve core (9) is slidably arranged inside the backwashing valve sleeve (8).

3. The expandable through packer capable of lifting and unsealing and washing well according to claim 2, wherein, A plurality of uniformly distributed pipeline grooves (11) are provided on the outer wall of the backwashing lower joint (6). At least one first pressing plate (20) is sleeved on the outer wall of the backwashing lower joint (6), and the first pressing plate (20) is fixed on the backwashing lower joint (6) through fastening screws (22).

4. The expandable through packer capable of lifting and unsealing and washing well according to claim 1, wherein, The packer module (3) includes: An inner central tube (17), one end of which is inserted into the interior of the hydraulic control joint (13), and the other end is provided with a backwashing mechanism. Along the axial direction on the outer wall of the inner central tube (17), there is a hydraulic control pipeline track groove for a preset pipeline (16) to pass through; A middle joint (23) is sleeved on the inner central tube (17). One end of the middle joint (23) is threadedly connected to the hydraulic control joint (13), and the other end is threadedly connected with an outer central tube (24). One end of the outer central tube (24) is fixedly connected to the backwashing mechanism. And a second clamping cavity wall is formed between the inner central tube (17), the middle joint (23) and the outer central tube (24); A setting mechanism is sleeved on the middle joint (23) and the outer central tube (24), and one end of the setting mechanism is fixedly connected to the middle joint (23).

5. The expandable through packer capable of lifting and unsealing and washing well according to claim 4, characterized in that, The setting mechanism includes: A second outer sleeve (19) is sleeved on the middle joint (23). One end of the second outer sleeve (19) is fixedly connected to the middle joint (23) by a release screw (18), and the other end is threadedly connected with a sealing joint (25); A check valve (26) is sleeved on the outer central tube (24), and one end of the check valve (26) abuts against a position inside the sealing joint (25); A check spring (27) is sleeved on the outer central tube (24). One end of the check spring (27) abuts against the check valve (26), and the other end abuts against a reducing joint (28). The reducing joint (28) is threadedly connected to the end of the sealing joint (25) away from the second outer sleeve (19); A rubber cylinder (29) is sleeved on the outer central tube (24). One end of the rubber cylinder (29) is threadedly connected to the end of the reducing joint (28) away from the check spring (27), and the other end is threadedly connected with a sliding joint (30). And the sliding joint (30) is slidably connected to the outer central tube (24); A plurality of installation grooves are evenly arranged on the outer wall of the middle joint (23). Each installation groove is communicated with the inner wall of the middle joint (23) by a liquid outlet hole. A hydraulic baffle (21) is slidably connected in each installation groove. Each hydraulic baffle (21) is provided with a groove, and a pressing plate (20) is arranged in each groove. Both ends of each pressing plate (20) are fixedly connected to the middle joint (23) by fastening screws (22).

6. The expandable penetrating packer for lifting and unsealing a well for washing as claimed in claim 4, characterized in that: The backwashing mechanism includes: A positioning joint (32) is sleeved on the outer central tube (24), and the positioning joint (32) is threadedly connected to the outer central tube (24); An upper suspension head (31) is sleeved on the positioning joint (32). One end of the upper suspension head (31) abuts against one end of the positioning joint (32), and the other end is threadedly connected with a lower suspension head (34); The packer lower sub (33) is sleeved on the inner central pipe (17). One place on the outer wall of the packer lower sub (33) is sleeved on the outer central pipe (24) and abuts against one end of the positioning sub (32), and the outer wall of the packer lower sub (33) is threadedly connected to the inner wall of the lower hanger head (34); The third backwashing channel (37) is arranged on the packer lower sub (33). The third backwashing channel (37) is communicated with the second clamping cavity wall, and the pre - installed pipeline (16) passes through the third backwashing channel (37).

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