Multifunctional flexible customized liquid drainage and gas production tool

Abstract

A multifunctional flexible customized liquid drainage and gas production tool relates to the technical field of petroleum and natural gas development and comprises an anchoring assembly, a sealing assembly, an atomization assembly and a rotational flow assembly which are sequentially connected from top to bottom, a jet flow seat and an atomization jet flow pipe are arranged in an outer cylinder of the atomization assembly, a liquid storage cavity and a rotational flow assembly are arranged in the rotational flow assembly, and the liquid storage cavity is communicated with the rotational flow assembly. When gas-liquid jet flows enter the rotational flow assembly, vortex is forced to form annular flow, the annular flow continuously enters the atomization jet flow pipe to be atomized, meanwhile, residual liquid is collected through the jet flow base and guided into the atomization jet flow pipe again to be atomized, and the liquid carrying capacity of gas is remarkably improved; by the adoption of the rotational flow guide structure, the gas-liquid two-phase flow form in a shaft can be converted into annular flow from the turbulent flow state, the gas liquid carrying capacity is improved, and the gas production period is effectively prolonged.

Description

Technical Field

[0001] This invention relates to the field of oil and gas development technology, specifically to a multifunctional, flexible, customized liquid drainage and gas extraction tool. Background Technology

[0002] Currently, commonly used fluid drainage and gas production technologies in oil and gas fields include foam drainage, gas lift, plunger, jet drainage, mechanical pumping, electric pumping, and multi-process combinations. The application of these technologies is limited by process conditions, process conversion, and operating costs, resulting in a limited scope of application. Among them, the widely used foam drainage is easily affected by high oil content, leading to its failure. Plunger, jet, mechanical pumping, electric pumping, and multi-process combination drainage and gas production technologies are difficult to switch between injection and production processes under non-operational conditions. Based on this, jet drainage technology, due to its simple structure, lack of external power source, and strong adaptability, is widely used in low-production gas wells or under downhole power-constrained conditions. However, existing jet drainage tools generally have the following shortcomings: First, most tools use a single-stage jet or single-atomization structure, resulting in low gas-liquid mixing efficiency and difficulty in maintaining stable fluid-carrying flow, especially in low-pressure, low-production wells, which can easily lead to fluid-carrying failure. Second, some devices have complex structures and large volumes, making them unsuitable for wireline operations and wellbore space constraints, leading to difficulties in daily maintenance. Therefore, there is an urgent need for a universal downhole fluid drainage tool that is compact in structure, multifunctional, has strong fluid carrying capacity, and can adapt to various complex conditions. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a multifunctional flexible customized fluid drainage and gas production tool, which has technical means such as swirl guidance and reduction of critical fluid carrying flow rate. Without relying on external power, it can effectively improve the gas-fluid carrying capacity at the bottom of the well, extend the stable gas production cycle of the wellbore, and adapt to the construction needs of wire rope operation, coiled tubing operation or simultaneous well completion operation. It can also meet the engineering needs of efficient operation in various complex application scenarios and the conversion of different process measures.

[0004] To solve at least one of the above-mentioned technical problems, the technical solution provided by the present invention is: A multifunctional, flexible, customized liquid drainage and gas sampling tool, comprising the following components connected sequentially from top to bottom: Anchoring assembly, used to seat the entire unit downhole; Sealing assembly, used to form a stable seal inside the wellbore to prevent gas leakage or backflow; Atomizing assembly, used to atomize the gas-liquid flow during the gas extraction process; Swirl assembly, used to regulate the distribution of gas-liquid flow patterns; The atomizing assembly includes an outer cylinder, an atomizing jet tube, a jet seat, and a central connector. The upper part of the outer cylinder is fixedly connected to the sealing assembly, and the central connector is detachably installed below it. The jet seat is installed in the pipe section between the outer cylinder and the central connector. An atomizing jet tube with its tip pointing upward is installed above the jet seat. Its interior is a central mixing chamber, which makes the main pipeline of the central connector, the main pipeline of the jet seat, and the central mixing chamber of the atomizing jet tube coaxially connected. The annular space between the atomizing jet tube body and the outer cylinder body is a return cavity. Several sets of jet seat outer tubes connected to the return cavity are also vertically arranged around the main pipeline of the jet seat, and the jet seat outer tubes are connected to the main pipeline of the jet seat through branch pipes.

[0005] One embodiment of the present invention is that the swirl assembly includes a sealing cylinder, a guide cylinder, a swirl component, a sealing ring, a lower connector, a liquid storage chamber, and a connecting hole. The sealing cylinder is coaxially sleeved outside the guide cylinder. The upper part of both the sealing cylinder and the guide cylinder is connected to the middle connector, and the lower connector is connected to both of them at their lower parts. The guide cylinder is coaxially connected to the main pipeline of the middle connector, and the lower connector is provided with multiple sets of through holes connecting the lower part of the lower connector and the inside of the guide cylinder. A swirling assembly is coaxially fixed inside the guide tube. The swirling assembly includes a main rotating shaft and a spiral guide groove that is arranged around the main rotating shaft from the bottom end to the top end. The side of the guide groove can contact the inner side of the guide tube. A liquid storage chamber is provided between the sealing cylinder and the guide cylinder. The liquid storage chamber is connected to the outer tube of the jet seat through multiple sets of pipes. The guide cylinder is also provided with multiple sets of connecting holes that connect the inside of the guide cylinder and the liquid storage chamber. The connecting holes do not contact the side of the guide groove.

[0006] Furthermore, the anchoring assembly includes an upper connector, a retrieval head, an inner liner, a central tube, a slip, and a limiting ring, wherein the outer surface of the central tube is fitted with an inner liner, the upper connector is located above the central tube, and is connected to the inner liner and the central tube by a pin; The retrieval head is fitted onto the outer surface of the inner lining, and a slip is fitted onto the outer surface of the inner lining below it, with the retrieval head connected to the slip. The cone of the Kava is also fitted with a limiting ring.

[0007] Furthermore, the sealing assembly includes a slip cone, a rubber sealing cylinder, a support tube, a spring, a support nut, a rubber cone, and a limiting nut. The support tube is detachably connected to the central tube. A slip cone with its conical tip pointing towards the central tube is sleeved on the outside of the support tube. The conical tip of the slip cone is located inside the slip. An interlayer is provided between the slip cone and the support tube, and a spring sleeved on the support tube is provided in the interlayer. The spring is axially limited by a support nut detachably located at its lower end. The rubber sealing cylinder is fixedly sleeved on the outer surface of the slip cone; A limiting nut can be detachably installed at the bottom of the support tube. The limiting nut limits and fixes the rubber cone sleeved on the outer surface of the support tube between the limiting nut and the rubber sealing cylinder. The tip of the rubber cone points to and contacts the rubber sealing cylinder. The bottom of the rubber cone is fixedly connected to the top of the outer cylinder.

[0008] Furthermore, at least a portion of the rubber sealing cylinder is a conical structure, and the conical surface of the conical structure is coplanar with the conical surface of the slip cone.

[0009] Furthermore, the helix angle of the guide groove is 55°, the groove depth is 10mm, and the groove width is 45mm.

[0010] The technical effects achieved by this invention are: 1. The present invention adopts a swirling flow guide structure design. By setting a swirling flow guide groove with a helix angle of 55° and a two-stage atomization component, the gas-liquid two-phase flow form in the wellbore is transformed from a turbulent state to an annular flow. By reducing the droplet diameter through atomization, the minimum critical liquid-carrying velocity is significantly reduced, the gas liquid-carrying capacity is improved, and the peak-shaving gas production cycle is effectively extended.

[0011] 2. The tool of this invention has a compact structure, with unobstructed gas injection channels and efficient gas production and liquid carrying functions. In addition to conventional oil and gas reservoirs, it is also suitable for the injection and production conversion stage of oil reservoir-type gas storage wells. After the tool is run into the wellbore, it can be used seamlessly in the gas injection and production stages without the need to repeatedly run the tubing string, which greatly reduces the operating cost and operating cycle.

[0012] 3. The invention has a modular overall structure, and its outer diameter can adapt to different tubing sizes such as 2-7 / 8″, 4-1 / 2″ and 5-1 / 2″. By replacing the tool connection components, it can support the deployment, setting and retrieval of wire ropes and the running of continuous tubing. At the same time, it can be run in sync with tubing during the completion of new wells, and has wide applicability and good construction compatibility.

[0013] 4. This invention achieves stable downhole fixation through the anchoring assembly, ensures gas-liquid isolation through the sealing assembly, and effectively regulates the gas-liquid flow distribution through the atomization assembly and swirl assembly. The overall structure is reliable and the operation is stable. It can fully adapt to application scenarios under complex conditions (such as extended reach wells, horizontal wells, and sand production) including conventional gas wells, gas storage wells, and offshore oil and gas wells. It has a wide range of applications and is easy to deploy quickly and operate for a long time in the field. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is an overall schematic diagram of the device in this invention; Figure 2 A three-dimensional schematic diagram of the swirl assembly in this invention; In the diagram, 1-Anchoring assembly, 10-Upper connector, 11-Pin, 12-Retrieving head, 13-Inner liner, 14-Central tube, 15-Slipper, 16-Limiting ring, 2-Sealing assembly, 20-Slipper cone, 21-Rubber sealing cylinder, 22-Support tube, 23-Spring, 24-Support nut, 25-Rubber cone, 26-Limiting nut, 3-Atomizing assembly, 30-Outer cylinder, 31-Atomizing jet tube, 32-Jet seat, 33-Middle connector, 34-Return chamber, 35-Central mixing chamber, 36-Jet seat outer tube, 4-Swirl assembly, 40-Sealing cylinder, 41-Guide tube, 42-Swirl component, 43-Sealing ring, 44-Lower connector, 45-Liquid storage chamber, 46-Connecting hole, 47-Guide groove. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings.

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0018] See Figure 1 A multifunctional, flexible, customized drainage and gas extraction tool, comprising the following components connected sequentially from top to bottom: Anchoring assembly 1, used to seat the entire unit downhole; The anchoring assembly 1 includes an upper connector 10, a retrieval head 12, an inner liner 13, a central tube 14, slips 15, and a limiting ring 16. Its main structure and usage can refer to existing technology. The wellbore is lowered to the design depth via a steel wire rope connected to the upper connector 10, and then descends under its own weight. The inner liner 13 is fitted onto the outer surface of the central tube 14. The upper connector 10 is positioned above the central tube 14 and connected to both the inner liner 13 and the central tube 14 via a pin 11. The retrieval head 12 is fitted onto the outer surface of the inner liner 13, and slips 15, also fitted onto the outer surface of the inner liner 13, are positioned below it and connected to the slips 15. A limiting ring 16 is fitted onto the cone of the slips 15 to constrain its position and prevent premature deployment that could affect the well's descent. Once the tool reaches the designed depth, the slips 15 are opened and pressed tightly against the inner wall of the wellbore by the action of the slip cone 20, thus achieving mechanical engagement and sealing.

[0019] Sealing assembly 2 is used to form a stable seal inside the wellbore to prevent gas from flowing out or backflowing; The sealing assembly 2 includes a slip cone 20, a rubber sealing cylinder 21, a support tube 22, a spring 23, a support nut 24, a rubber cone 25, and a limiting nut 26. Its main structure and usage can also refer to existing technologies. The support tube 22 is detachably connected to the central tube 14. A slip cone 20 with its conical tip pointing towards the central tube 14 is fitted outside the support tube 22. The conical tip of the slip cone 20 is located inside the slip 15. A sandwich structure is provided between the slip cone 20 and the support tube 22, and a spring 23 is fitted onto the support tube 22 within this sandwich structure. The spring 23 is axially limited by a support nut 24 detachably located at its lower end. The rubber sealing cylinder 21 is fixedly fitted onto the outer surface of the slip cone 20. At least a portion of the rubber sealing cylinder 21... The support tube 22 has a conical structure, with its conical surface coplanar with that of the slip cone 20, ensuring that its inclined surface is synchronized with the slip cone 20 and does not affect the normal operation of the slip 15. A limiting nut 26 is detachably installed at the bottom of the support tube 22. The limiting nut 26 limits and fixes the rubber cone 25, which is sleeved on the outer surface of the support tube 22, between the limiting nut 26 and the rubber sealing cylinder 21. The tip of the conical surface of the rubber cone 25 points towards and contacts the rubber sealing cylinder 21. The lower part of the rubber cone 25 is fixedly connected to the upper part of the outer cylinder 30. When the tool is set, the support tube 22 compresses the spring 23 downwards, causing the rubber sealing cylinder 21 to be opened by the rubber cone 25 and make tight contact with the wellbore, thereby achieving a stable seal inside the wellbore and preventing gas leakage or backflow.

[0020] Atomizing assembly 3 is used to atomize the gas-liquid flow during the gas extraction process; The atomizing assembly 3 includes an outer cylinder 30, an atomizing jet tube 31, a jet seat 32, and a central connector 33. The outer cylinder 30 is fixedly connected to the sealing assembly at the top, and the central connector 33 is detachably installed at the bottom. The jet seat 32 is installed in the pipe section between the outer cylinder 30 and the central connector 33. An atomizing jet tube 31 with its tip pointing upward is installed above the jet seat 32. Its interior is a central mixing chamber 35, so that the main pipeline of the central connector 33, the main pipeline of the jet seat 32, and the central mixing chamber 35 of the atomizing jet tube 31 are coaxially connected. The annulus between the atomizing jet tube 31 and the outer cylinder 30 is a return chamber 34. Multiple sets of jet seat outer tubes 36 connected to the return chamber 34 are vertically installed around the main pipeline of the jet seat 32, and the jet seat outer tubes 36 are connected to the main pipeline of the jet seat 32 through branch pipes. During the gas production stage, the bottom gas drives the accumulated liquid through the swirl assembly into the atomizing jet pipe 31, and forms an atomized flow through the central mixing chamber 35, which significantly improves the liquid carrying capacity of the gas flow. The liquid that fails to be atomized will fall back into the outer pipe 36 of the jet seat due to gravity, and return to the main pipeline of the jet seat 32 to continue atomization, producing a two-stage atomization effect. This cycle achieves full and efficient atomization of the accumulated liquid in the well.

[0021] Swirl assembly 4 is used to regulate the gas-liquid flow distribution. The swirl assembly 4 includes a sealing cylinder 40, a guide cylinder 41, a swirl component 42, a sealing ring 43, a lower connector 44, a liquid storage chamber 45, and a connecting hole 46. The sealing cylinder 40 is coaxially sleeved outside the guide cylinder 41. The upper parts of both the sealing cylinder 40 and the guide cylinder 41 are connected to the middle connector 33, and the lower connector 44 is connected to both of them below. The guide cylinder 41 is coaxially connected to the main pipeline of the middle connector 33. The lower connector 44 is provided with multiple sets of through holes that connect the lower part of the lower connector 44 to the inside of the guide cylinder 41. See Figure 2 A swirling assembly 42 is coaxially fixed inside the guide tube 41. The swirling assembly 42 includes a main rotating shaft and a spiral guide groove 47 that is arranged around the bottom and top of the main rotating shaft. The side of the guide groove 47 can contact the inner side of the guide tube 41. A liquid storage chamber 45 is provided between the sealing cylinder 40 and the guide cylinder 41. The liquid storage chamber 45 is connected to the outer tube 36 of the jet seat through multiple sets of pipes. The guide cylinder 41 is also provided with multiple sets of connecting holes 46 that connect the inside of the guide cylinder 41 and the liquid storage chamber 45. The connecting holes 46 do not contact the side of the guide groove 47, that is, the connecting holes 46 are located between adjacent guide grooves 47.

[0022] The gas-liquid mixture in the well will first enter the guide tube 41 where the vortex assembly 42 is located through the through hole of the lower connector 44. The liquid-carrying gas flow can flow from bottom to top along the guide groove 47, thereby generating a vortex-shaped annular flow along the guide groove 47 of the vortex assembly 42. Part of the annular flow will enter the liquid storage chamber 45 through the connecting hole 46 and then enter the outer tube 36 of the jet seat. Finally, it will enter the central mixing chamber 35 through the branch pipe between the outer tube 36 of the jet seat and the main pipeline of the jet seat 32. This part of the annular flow will also carry the liquid flow that has not been atomized in the atomizing jet pipe 31 back into the jet seat 32, fully atomizing the unatomized liquid flow and significantly improving the atomization effect. The remaining liquid-carrying gas flow that has passed through the vortex assembly 42 will directly enter the central mixing chamber 35 through the main pipeline to perform the main atomization function.

[0023] In order to ensure the flow rate of the fluid entering the guide tube 41 to generate a stable vortex-shaped annular flow, in some embodiments, the helix angle of the guide groove 47 is 55°, the groove depth is 10 mm, and the groove width is 45 mm.

[0024] When this invention is in operation: The tool as a whole is first lowered from the ground via a wire rope or coiled tubing. The upper connector 10, retrieval head 12 and other structures are then sent down the wellbore to the target depth, and the tool descends by its own weight.

[0025] Once the tool reaches the designed depth, the slips 15 in the anchoring assembly 1 are opened by the slip cones 20, closely adhering to the inner wall of the wellbore and mechanically engaging with the wellbore to complete the setting seal.

[0026] After the tool is set, an axial force is applied to the rubber cone 25, and the rubber sealing cylinder 21 is opened by the rubber cone 25, forming a stable seal inside the wellbore to prevent gas from flowing out or backflowing.

[0027] During gas production, gas is initially produced simultaneously through the tubing and annulus. When downhole fluid accumulation affects operations, gas production is then carried out solely through the tubing. The bottomhole gas drives the accumulated fluid through the through-hole of the lower connector 44 into the guide tube 41 where the vortex assembly 42 is located. It rises in the guide channel to form a vortex-like annular flow. Part of the film flow enters the liquid storage chamber 45 laterally, then flows into the outer tube 36 of the jet seat, and finally enters the central mixing chamber 35 of the atomizing jet tube 31 for atomization. The remaining gas-liquid flow directly enters the central mixing chamber 35 along the central tube of the guide tube 41 for atomization. The un-atomized liquid is returned to the jet seat 32 along the return chamber 34 by its own weight, and then re-enters the central mixing chamber 35 for atomization, thereby significantly improving the gas-liquid carrying capacity.

[0028] After atomization, the gas-liquid mixture passes through the internal channels of the sealing assembly 2 and the anchoring assembly 1, and returns to the ground via the oil pipe, realizing the process of draining liquid and collecting gas.

[0029] For replacement or maintenance, the tool can be retrieved by connecting it to the retrieval head 12. The slips 15 retract during upward pulling, and the entire tool can be smoothly withdrawn from the wellbore. This process does not require tubing string operation, making it safe, efficient, and suitable for rapid on-site deployment and retrieval.

[0030] The drainage and gas production tool of this invention can be modularized, multifunctional, and flexible. It can be matched with different specifications of coiled tubing / tubing / wire rope lowering processes and tools. According to the specific development scheme parameters, components such as swirl, jet and atomization can be reasonably selected and matched. It has flow safety guarantee performance such as erosion resistance and sand prevention. The simulated liquid carrying efficiency of the high-efficiency multifunctional flexible customized drainage and gas production tool can be ≥90%.

[0031] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this invention.

[0032] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A multifunctional, flexible, customized liquid drainage and gas extraction tool, characterized in that, Including the connections set from top to bottom: Anchoring assembly (1) is used to seat the entire unit downhole; The sealing assembly (2) is used to form a stable seal inside the wellbore to prevent gas from flowing out or backflowing. Atomizing assembly (3) is used to atomize the gas-liquid flow during the gas extraction process; The swirl assembly (4) is used to regulate the gas-liquid flow distribution. The atomizing assembly (3) includes an outer cylinder (30), an atomizing jet tube (31), a jet seat (32), and a central connector (33). The upper part of the outer cylinder (30) is fixedly connected to the sealing assembly, and the central connector (33) is detachably installed below it. The jet seat (32) is installed in the pipe section between the outer cylinder (30) and the central connector (33). The atomizing jet tube (31) with its tip pointing upward is installed above the jet seat (32), and its interior is a central mixing chamber (35), so that the main pipeline of the central connector (33), the main pipeline of the jet seat (32), and the central mixing chamber (35) of the atomizing jet tube (31) are coaxially connected. The annular space between the atomizing jet tube (31) and the outer cylinder (30) is the return cavity (34). Around the main pipeline of the jet seat (32), there are also multiple sets of jet seat outer tubes (36) that connect to the return cavity (34), and the jet seat outer tubes (36) are connected to the main pipeline of the jet seat (32) through branch pipes.

2. The multifunctional flexible customized drainage and gas sampling tool according to claim 1, characterized in that: The swirl assembly (4) includes a sealing cylinder (40), a guide cylinder (41), a swirl component (42), a sealing ring (43), a lower connector (44), a liquid storage chamber (45), and a connecting hole (46). The sealing cylinder (40) is coaxially sleeved outside the guide cylinder (41). The upper part of both the sealing cylinder (40) and the guide cylinder (41) is connected to the middle connector (33), and the lower connector (44) is connected to both of them. The guide cylinder (41) and the middle connector (33) are coaxially connected to the main pipeline. The lower connector (44) is provided with multiple sets of through holes connecting the lower part of the lower connector (44) and the inside of the guide cylinder (41). A swirling assembly (42) is coaxially fixed inside the guide tube (41). The swirling assembly (42) includes a main rotating shaft and a spiral guide groove (47) arranged around the bottom and top of the main rotating shaft. The side of the guide groove (47) can contact the inner side of the guide tube (41). A liquid storage chamber (45) is provided between the sealing cylinder (40) and the guide cylinder (41). The liquid storage chamber (45) is connected to the outer tube (36) of the jet seat through multiple sets of pipelines. The guide cylinder (41) is also provided with multiple sets of connecting holes (46) connecting the inside of the guide cylinder (41) and the liquid storage chamber (45). The connecting holes (46) do not contact the side of the guide groove (47).

3. The multifunctional flexible customized drainage and gas sampling tool according to claim 2, characterized in that: The anchoring assembly (1) includes an upper connector (10), a retrieval head (12), an inner liner (13), a central tube (14), a slip (15), and a limiting ring (16). The outer surface of the central tube (14) is fitted with the inner liner (13), and the upper connector (10) is located above the central tube (14) and connected to the inner liner (13) and the central tube (14) by a pin (11). The retrieval head (12) is fitted onto the outer surface of the inner lining (13), and a slip (15) is fitted onto the outer surface of the inner lining (13) below it, and the retrieval head (12) is connected to the slip (15). The cone of the kava (15) is also fitted with a limiting ring (16).

4. The multifunctional flexible customized drainage and gas extraction tool according to claim 3, characterized in that: The sealing assembly (2) includes a slip cone (20), a rubber sealing cylinder (21), a support tube (22), a spring (23), a support nut (24), a rubber cone (25), and a limiting nut (26). The support tube (22) is detachably connected to the central tube (14). The support tube (22) is fitted with a slip cone (20) with its cone tip pointing towards the central tube (14). The cone tip of the slip cone (20) is located inside the slip (15). A sandwich is provided between the slip cone (20) and the support tube (22), and a spring (23) is fitted on the support tube (22) in the sandwich. The spring (23) is axially limited by a support nut (24) detachably located at its lower end. The rubber sealing cylinder (21) is fixedly sleeved on the outer surface of the slip cone (20); The bottom of the support tube (22) can also be detachably provided with a limiting nut (26). The limiting nut (26) limits and fixes the rubber cone (25) sleeved on the outer surface of the support tube (22) between the limiting nut (26) and the rubber sealing cylinder (21). The tip of the cone of the rubber cone (25) points to and contacts the rubber sealing cylinder (21). The bottom of the rubber cone (25) is fixedly connected to the top of the outer cylinder (30).

5. The multifunctional flexible customized drainage and gas extraction tool according to claim 4, characterized in that: At least a portion of the rubber sealing cylinder (21) is a conical structure, and the conical surface of the conical structure is coplanar with the conical surface of the cam cone (20).

6. The multifunctional flexible customized drainage and gas extraction tool according to claim 2, characterized in that: The guide groove (47) has a helix angle of 55°, a groove depth of 10 mm, and a groove width of 45 mm.

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