Self-adaptive plunger gas lifting and conveying equipment

Abstract

The utility model provides self-adaptive plunger gas lifting and conveying equipment, and relates to the technical field of oil and gas exploitation. The self-adaptive plunger gas lift comprises a column body, a rubber sleeve, a sealing piece and a pressure transmission medium, a cavity and a connecting channel communicated with the cavity are formed in the column body, and the connecting channel extends to the outer surface of the column body from the cavity. And the column body is also provided with an opening communicated with the cavity. The rubber sleeve sleeves the outer surface of the column body and covers one end, far away from the cavity, of the connecting channel. The sealing piece is fixedly connected with the column body and covers the opening; and the sealing element and the rubber sleeve are jointly used for enclosing the cavity into a closed space. And the pressure transmission medium is arranged in the cavity. Under the state that pressure is applied to the sealing piece and the sealing piece deforms towards the pressure transmission medium, the pressure acts on the inner surface of the rubber sleeve through the pressure transmission medium, so that the rubber sleeve expands in the radial direction of the column body. The self-adaptive plunger gas lift can adapt to the inner diameter difference of different positions of the same pipeline and always move by being attached to the inner wall of the pipeline, and the oil and gas exploitation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas exploitation, in particular to an adaptive plunger gas lift and conveying device. Background Art

[0002] In the field of oil and gas extraction, gas lift plungers are often used to transport oil or water from the bottom of the well to the surface. The gas lift plunger moves up and down in the pipeline. Due to the processing and manufacturing errors of the pipeline, the inner diameters at different positions in the same pipeline may be different, while the size of the gas lift plunger is fixed. When the gas lift plunger moves to different positions in the pipeline, the gap between the inner wall of the pipeline and the outer surface of the gas lift plunger is also different. If the gap is too large, the oil will leak from the gap during the movement of the gas lift plunger, resulting in low oil delivery efficiency. If the gap is too small, the gas lift plunger is easily stuck during movement and the movement is not smooth. Utility Model Content

[0003] The objectives of the utility model include, for example, providing an adaptive plunger gas lift and conveying equipment. When the adaptive plunger gas lift moves in a pipeline, the outer diameter of the adaptive plunger gas lift can be changed to adapt to the difference in inner diameters at different positions in the same pipeline, and the adaptive plunger gas lift can be kept moving in close contact with the inner wall of the pipeline to improve transportation efficiency without getting stuck.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the utility model provides an adaptive plunger gas lift, comprising:

[0006] A column; a cavity and a connecting channel communicating with the cavity are provided in the column; the connecting channel extends from the cavity to the outer surface of the column; an opening communicating with the cavity is also provided on the column;

[0007] A rubber sleeve, which is sleeved on the outer surface of the column and covers an end of the connecting channel away from the cavity;

[0008] A sealing member, the sealing member is fixedly connected to the column and covers the opening; the sealing member and the rubber sleeve are used together to enclose the cavity into a closed space;

[0009] a pressure transmission medium, the pressure transmission medium being disposed in the cavity;

[0010] When pressure is applied to the sealing element and the sealing element is deformed toward the pressure transmission medium, the pressure acts on the inner surface of the rubber sleeve through the pressure transmission medium, so that the rubber sleeve expands along the radial direction of the column.

[0011] In an optional embodiment, the pressure transmission medium is an incompressible liquid.

[0012] In an optional embodiment, the adaptive plunger gas lift further includes a first fastener and a second fastener, wherein the first fastener is connected to the column and used to fix one end of the rubber sleeve, and the second fastener is connected to the column and used to fix the other end of the rubber sleeve.

[0013] In an optional embodiment, the first fastener and the second fastener are nuts respectively.

[0014] In an optional embodiment, the column has a first groove and a second groove opened along the axial direction, one end of the rubber sleeve is embedded in the first groove, and the other end of the rubber sleeve is embedded in the second groove.

[0015] In an optional embodiment, an opening is provided at the bottom of the column, and the sealing member is sealingly connected to the column to seal the opening.

[0016] In an optional embodiment, a pressure plate is provided at the opening, and the pressure plate is connected to the column to fix the sealing member.

[0017] In an optional embodiment, a protrusion is provided on the outer surface of the rubber sleeve.

[0018] In a second aspect, the utility model provides a conveying device, comprising a pipeline and an adaptive plunger gas lift as described in any one of the aforementioned embodiments, wherein the adaptive plunger gas lift is arranged in the pipeline and can move in the pipeline.

[0019] In an optional embodiment, when the adaptive plunger gas lift moves upward along the pipeline, the gap between the rubber sleeve and the inner wall of the pipeline is zero, or the rubber sleeve and the pipeline move under a preset friction resistance.

[0020] The beneficial effects of the utility model include, for example:

[0021] The adaptive plunger gas lift provided by the embodiment of the utility model comprises a seal, a column and a rubber sleeve which together form a closed space, in which a pressure transmission medium is provided. When pressure is applied to the seal and the seal is deformed toward the side of the pressure transmission medium, the pressure acts on the inner surface of the rubber sleeve through the pressure transmission medium, so that the rubber sleeve expands along the radial direction of the column, thereby realizing a change in the outer diameter of the entire adaptive plunger gas lift. In this way, the inner diameter error of the pipeline can be adapted, and the rubber sleeve of the adaptive plunger gas lift and the inner wall of the pipeline can always be kept in close contact and movement, thereby reducing oil leakage from the gap between the two and improving the transportation efficiency of the oil. It can also effectively prevent the adaptive plunger gas lift from getting stuck during movement, thereby improving transportation efficiency.

[0022] The conveying equipment provided by the embodiment of the utility model includes a pipeline and the above-mentioned adaptive plunger gas lift. The adaptive plunger gas lift is not affected by the changes in the inner diameter of the pipeline, and can adaptively adjust the outer diameter of the rubber sleeve according to the inner diameter of the pipeline, so as to keep the adaptive plunger gas lift and the pipeline in a state of fit and movement without getting stuck, thereby reducing leakage during oil transportation and improving transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of an application scenario of the adaptive plunger gas lift provided by an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the overall structure of the adaptive plunger gas lift provided by an embodiment of the utility model;

[0026] Figure 3 A cross-sectional schematic diagram of an adaptive plunger gas lift provided by an embodiment of the utility model;

[0027] Figure 4 A schematic diagram of the structure of a rubber sleeve for adaptive plunger gas lift provided by an embodiment of the utility model;

[0028] Figure 5 A schematic structural diagram of a column for adaptive plunger gas lift provided by an embodiment of the utility model;

[0029] Figure 6 A schematic diagram of the cross-sectional structure of a column for adaptive plunger gas lift provided in an embodiment of the utility model.

[0030] Icons: 100-adaptive plunger gas lift; 110-column; 111-cavity; 113-connecting channel; 114-opening; 115-first groove; 116-second groove; 117-step portion; 120-rubber sleeve; 121-reducing portion; 123-installing portion; 1231-pressing section; 1233-embedded section; 130-seal; 140-pressure transmission medium; 151-first fastener; 153-second fastener; 160-pressure plate; 170-screw; 200-pipeline. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] 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 present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0035] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0036] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0037] This embodiment provides an adaptive plunger gas lift, which can be used in oil and gas production equipment to transport liquid from the bottom of the well to the ground. Of course, it can also be used in similar transportation scenarios in other fields, which are not specifically limited here.

[0038] Please refer to Figures 1 to 4The adaptive plunger gas lift 100 includes a column 110, a rubber sleeve 120, a seal 130 and a pressure transmission medium 140. The column 110 is provided with a cavity 111 and a connecting channel 113 connected to the cavity 111. The connecting channel 113 extends from the cavity 111 to the outer surface of the column 110. The column 110 is also provided with an opening 114 connected to the cavity 111. The rubber sleeve 120 is sleeved on the outer surface of the column 110 and covers the end of the connecting channel 113 away from the cavity 111. The seal 130 is fixedly connected to the column 110 and covers the opening 114; the seal 130 and the rubber sleeve 120 are used together to enclose the cavity 111 into a closed space. The pressure transmission medium 140 is arranged in the cavity 111. When pressure is applied to the seal 130 and the seal 130 is deformed toward the pressure transmission medium 140, the pressure acts on the inner surface of the rubber sleeve 120 through the pressure transmission medium 140, so that the rubber sleeve 120 expands along the radial direction of the column 110. In this way, the outer diameter of the rubber sleeve 120 is variable, which can adapt to the inner diameter error at different positions of the pipeline 200, and always keep the rubber sleeve 120 of the adaptive plunger gas lift 100 and the inner wall of the pipeline 200 in close contact and movement, reduce the leakage of liquid from the gap between the two, and improve the transportation efficiency of the liquid. It can also effectively prevent the adaptive plunger gas lift 100 from getting stuck during the movement process, thereby improving the transportation efficiency.

[0039] Optionally, the pressure transmission medium 140 is an incompressible liquid. It should be noted that the incompressible liquid should satisfy the requirement that the volume remains basically unchanged within a relatively large temperature difference range and no phase change occurs. The relatively large temperature difference range can be selected to be minus 60 degrees Celsius to 200 degrees Celsius. And it does not solidify in an environment of about minus 60 degrees Celsius. Of course, the pressure transmission medium 140 is not limited to liquids. If some gases can meet the above requirements, they can also be used as the pressure transmission medium 140 in this embodiment.

[0040] The number of the connecting channels 113 can be one or more. If there are multiple connecting channels 113, the multiple connecting channels 113 are evenly distributed along the outer surface of the column 110, for example, there can be two, three, four, five, six, eight or more connecting channels, etc., which are not specifically limited here. The multiple connecting channels 113 are evenly distributed so that the expansion of the rubber sleeve 120 in the radial direction is more uniform.

[0041] Combination Figure 3 and Figure 4 Optionally, the adaptive plunger gas lift 100 further includes a first fastener 151 and a second fastener 153, wherein the first fastener 151 is connected to the column 110 and is used to fix one end of the rubber sleeve 120, and the second fastener 153 is connected to the column 110 and is used to fix the other end of the rubber sleeve 120. In this embodiment, the first fastener 151 and the second fastener 153 are nuts, respectively.

[0042] The rubber sleeve 120 has a mounting portion 123 formed at both ends and a reducing portion 121 formed in the middle, and the mounting portion 123 is used to be fixedly connected to the column 110. Among them, the mounting portion 123 includes a connected pressing section 1231 and an embedding section 1233, and the cross-section after the pressing section 1231 and the embedding section 1233 are connected is L-shaped. Optionally, the column 110 has a first groove 115 and a second groove 116 opened along the axial direction, one end of the rubber sleeve 120 is embedded in the first groove 115, and the other end of the rubber sleeve 120 is embedded in the second groove 116. That is, the pressing section 1231 at the upper end of the rubber sleeve 120 is located between the first fastener 151 and the column 110, and the embedding section 1233 at the upper end is located in the first groove 115. The pressing section 1231 at the lower end of the rubber sleeve 120 is located between the second fastener 153 and the column 110, and the embedding section 1233 at the lower end is located in the second groove 116.

[0043] Combination Figure 5 and Figure 6 It can be understood that the column 110 is provided with a step portion 117 for carrying the upper end embedded section 1233 and the lower end embedded section 1233, respectively, and the first fastener 151 and the second fastener 153 are respectively threadedly connected to the column 110, and the first fastener 151 and the second fastener 153 are respectively abutted against the step portion 117 at the corresponding position to lock and fix the pressing section 1231. In addition, the embedded section 1233 is inserted into the first groove 115 and the second groove 116 of the column 110, and the clamping structure is more stable. In this way, the reliability of the connection between the rubber sleeve 120 and the column 110 can be ensured, and the sealing of the connection between the rubber sleeve 120 and the column 110 can be improved, the sealing of the closed space can be improved, the internal pressure transmission medium 140 can be prevented from leaking or flowing, and the corresponding speed and change accuracy of the rubber sleeve 120 diameter change can be improved.

[0044] Of course, in some embodiments, the rubber sleeve 120 and the column 110 may be fixed by screw connection, bonding, welding or other fixing methods, which are not specifically limited here.

[0045] Optionally, the bottom of the column 110 is provided with an opening 114, the opening 114 is communicated with the cavity 111, and the sealing member 130 is sealedly connected to the column 110 to block the opening 114 and form a closed space in the column 110. The sealing member 130 can be a sealing rubber, and the sealing rubber covers the opening 114.

[0046] Optionally, a pressing plate 160 is provided at the opening 114, and the pressing plate 160 is connected to the cylinder 110 to fix the sealing member 130 and prevent the sealing member 130 from falling off. In this embodiment, the sealing member 130 is sandwiched between the pressing plate 160 and the cylinder 110. The pressing plate 160 and the cylinder 110 are fixedly connected by screws 170, and the screws 170 are sequentially passed through the pressing plate 160, the sealing member 130 and the cylinder 110. Optionally, the pressing plate 160 is in a circular ring shape, which is used to press and fix the edge of the sealing rubber. The middle part of the sealing rubber is exposed from the pressing plate 160. When axial pressure is applied to the bottom of the cylinder 110, the pressure directly acts on the sealing rubber, and the sealing rubber undergoes elastic deformation, and is applied to the rubber sleeve 120 through the pressure transmission medium 140, so that the rubber sleeve 120 expands and the outer diameter of the rubber sleeve 120 changes. The greater the pressure applied, the greater the expansion amount of the rubber sleeve 120, and the greater the outer diameter of the rubber sleeve 120. On the contrary, the smaller the applied pressure is, the smaller the expansion amount of the rubber sleeve 120 is, and the smaller the outer diameter of the rubber sleeve 120 is. Of course, if the adaptive plunger gas lift 100 is applied in other fields or other occasions, applying negative pressure at the bottom of the column 110 can cause the seal 130 to deform downward, and can also cause the rubber sleeve 120 to shrink radially inward and reduce the outer diameter.

[0047] It is understandable that the seal 130 and the column 110 may also be connected in other ways, including but not limited to bolt connection, clamping, bonding, welding or riveting, etc., which are not specifically limited here.

[0048] The setting of the seal 130 can effectively block sand or other impurities in the liquid from entering the cavity 111, and can prevent impurities from entering the cavity 111 to block the connecting channel 113, thereby avoiding the rubber sleeve 120 from changing diameter and failing in the middle section of the pressure transmission path.

[0049] Optionally, the outer surface of the rubber sleeve 120 is provided with a protrusion (not shown). The protrusion and the rubber sleeve 120 are integrally formed. The setting of the protrusion can improve the wear resistance of the rubber sleeve 120, reduce the friction resistance between the inner wall of the pipe 200 and the rubber sleeve 120, and move more smoothly. At the same time, it can also reduce the leakage of liquid. In addition, the setting of the protrusion can also have a certain cleaning effect on the inner wall of the pipe 200, and scrape off the sand and other attachments on the inner wall of the pipe 200.

[0050] Of course, in some embodiments, the protrusion may also be omitted, that is, the outer surface of the rubber sleeve 120 is a smooth surface.

[0051] In this embodiment, both the rubber sleeve 120 and the sealing member 130 can be made of wear-resistant rubber material, such as nitrile rubber, butadiene rubber, etc., which can be elastically deformed and has good wear resistance.

[0052] Combination Figure 1The embodiment of the utility model also provides a conveying device, including a pipeline 200 and an adaptive plunger gas lift 100 as in any one of the aforementioned embodiments, wherein the adaptive plunger gas lift 100 is disposed in the pipeline 200 and can move in the pipeline 200. Optionally, when the adaptive plunger gas lift 100 is in an upward state along the pipeline 200, the gap between the rubber sleeve 120 and the inner wall of the pipeline 200 is zero, or the rubber sleeve 120 and the pipeline 200 move under a preset friction resistance. In other words, in the upward state, the rubber sleeve 120 is always kept in close contact with the inner wall of the pipeline 200 to reduce oil leakage from the gap between the two, improve oil transportation efficiency, and improve oil production efficiency.

[0053] The working principle of the adaptive plunger gas lift 100 and conveying equipment is as follows:

[0054] For the same pipe 200, the inner diameter at different positions may have errors due to processing or installation. If the inner diameter φ of the pipe 200 is 50 mm, due to the error of actual processing accuracy, the actual inner diameter of the pipe 200 may be 50±1 mm at different positions, that is, the inner diameter φ of the pipe 200 is not a fixed value.

[0055] After the adaptive plunger gas lift 100 is installed in the pipeline 200, when no pressure is applied to the bottom of the column 110, there is a certain gap d between the outer diameter of the adaptive plunger gas lift 100 and the inner wall of the pipeline 200, and the adaptive plunger gas lift 100 can sink to the bottom of the well by its own weight. After a certain amount of oil and the like penetrate into the upper part of the column 110 through the gap between the two, a preset pressure F is applied to the bottom of the column 110 in the axial direction. The preset pressure acts on the sealing rubber at the bottom of the column 110, causing the sealing rubber to undergo upward elastic deformation, and then the pressure is transmitted to the inner surface of the rubber sleeve 120 through the incompressible liquid inside the cavity 111, so that the outer diameter of the rubber sleeve 120 increases and automatically adheres to the inner wall of the pipeline 200. Continue to apply pressure to the bottom of the column 110, push the column 110 and the oil on the upper part of the column 110 upward to the wellhead, and realize the transportation of the oil at the bottom of the well to the ground, that is, realize the oil production operation. Afterwards, the pressure at the bottom of the column 110 can be removed, and the adaptive plunger gas lift 100 sinks to the bottom of the well under the action of gravity to complete the next oil production.

[0056] During the actual working process, by adjusting the size of the preset pressure F at the bottom of the column 110, the outer diameter of the rubber sleeve 120 can automatically adapt to the change of the inner diameter of the oil pipe without getting stuck. At the same time, it ensures that during the upward process, the rubber sleeve 120 and the inner wall of the pipeline 200 are always tightly fitted to reduce oil leakage and improve the oil delivery efficiency.

[0057] Optionally, a sensor can be installed on the column 110 to detect the oil pressure. The external pressure at the bottom of the column 110 can be adjusted in real time according to the actual oil pressure, so as to more accurately adjust the expansion of the rubber sleeve 120, taking into account the upward movement efficiency of the adaptive plunger gas lift 100 and the single oil transportation volume. The sensor can be a single pressure sensor or a composite sensor, such as a composite sensor that can simultaneously monitor the pressure, temperature, viscosity and other parameter information of the oil. The composite sensor can more accurately control the expansion of the rubber sleeve 120 and better adapt to the changes in the inner diameter of the pipeline 200.

[0058] In summary, the adaptive plunger gas lift 100 and the conveying equipment provided by the embodiment of the utility model have the following beneficial effects, for example:

[0059] The adaptive plunger gas lift 100 provided by the embodiment of the utility model, the seal 130, the column 110 and the rubber sleeve 120 together form a closed space, and an incompressible pressure transmission medium 140 is provided in the closed space. When axial pressure is applied to the seal 130, the pressure acts on the inner surface of the rubber sleeve 120 through the pressure transmission medium 140, so that the rubber sleeve 120 expands along the radial direction of the column 110, thereby realizing the change of the outer diameter of the entire adaptive plunger gas lift 100. In this way, it is possible to adapt to the inner diameter error of the pipeline 200, always keep the rubber sleeve 120 of the adaptive plunger gas lift 100 and the inner wall of the pipeline 200 in close contact and movement, reduce the leakage of oil from the gap between the two, and improve the transportation efficiency of the oil. It can also effectively prevent the adaptive plunger gas lift 100 from getting stuck during movement, thereby improving the transportation efficiency.

[0060] The conveying equipment provided by the embodiment of the utility model includes a pipeline 200 and the above-mentioned adaptive plunger gas lift 100. The adaptive plunger gas lift 100 is not affected by the change of the inner diameter difference of the pipeline 200, and can adaptively adjust the outer diameter of the rubber sleeve 120 according to the inner diameter of the pipeline 200, so as to keep the adaptive plunger gas lift 100 and the pipeline 200 in a fit state and move without getting stuck, thereby reducing leakage during oil transportation and improving transportation efficiency.

[0061] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An adaptive plunger gas lift, characterized in that: include: A column (110); a cavity (111) and a connecting channel (113) communicating with the cavity (111) are provided in the column (110); the connecting channel (113) extends from the cavity (111) to the outer surface of the column (110); an opening (114) communicating with the cavity (111) is also provided on the column (110); A rubber sleeve (120), the rubber sleeve (120) being sleeved on the outer surface of the column (110) and covering an end of the connecting channel (113) away from the cavity (111); a sealing member (130), the sealing member (130) being fixedly connected to the column (110), and the sealing member (130) covering the opening (114); the sealing member (130) and the rubber sleeve (120) are used together to enclose the cavity (111) into a closed space; a pressure transmission medium (140), the pressure transmission medium (140) being disposed in the cavity (111); When pressure is applied to the sealing member (130) and the sealing member (130) is deformed toward the pressure transmission medium (140), the pressure acts on the inner surface of the rubber sleeve (120) through the pressure transmission medium (140) to cause the rubber sleeve (120) to expand radially along the column (110).

2. The adaptive plunger gas lift according to claim 1, characterized in that: The pressure transmission medium (140) is an incompressible liquid.

3. The adaptive plunger gas lift according to claim 1, characterized in that: The adaptive plunger gas lift also includes a first fastener (151) and a second fastener (153), wherein the first fastener (151) is connected to the column (110) and is used to fix one end of the rubber sleeve (120), and the second fastener (153) is connected to the column (110) and is used to fix the other end of the rubber sleeve (120).

4. The adaptive plunger gas lift according to claim 3, characterized in that: The first fastener (151) and the second fastener (153) are nuts respectively.

5. The adaptive plunger gas lift according to claim 3, characterized in that: The column (110) has a first groove (115) and a second groove (116) opened along the axial direction, one end of the rubber sleeve (120) is embedded in the first groove (115), and the other end of the rubber sleeve (120) is embedded in the second groove (116).

6. The adaptive plunger gas lift according to claim 1, characterized in that: The bottom of the column (110) is provided with the opening (114), and the sealing member (130) is sealingly connected to the column (110) to seal the opening (114).

7. The adaptive plunger gas lift according to claim 6, characterized in that: A pressing plate (160) is provided at the opening (114), and the pressing plate (160) is connected to the column (110) to fix the sealing element (130).

8. The adaptive plunger gas lift according to any one of claims 1 to 7, characterized in that: The outer surface of the rubber sleeve (120) is provided with a protrusion.

9. A conveying device, characterized in that: The invention comprises a pipeline (200) and an adaptive plunger gas lift (100) according to any one of claims 1 to 8, wherein the adaptive plunger gas lift (100) is arranged in the pipeline (200) and can move in the pipeline (200).

10. The conveying device according to claim 9, characterized in that When the adaptive plunger gas lift (100) is moving upward along the pipeline (200), the gap between the rubber sleeve (120) and the inner wall of the pipeline (200) is zero, or the rubber sleeve (120) and the pipeline (200) move under a preset friction resistance.

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