Ball serving device and oil extraction system
By introducing a ball storage tube into the serving device, the frequency of opening of the high-pressure valve is reduced, and the problem of serious valve wear is solved, and the effect of extending the valve life and cost saving is achieved.
Patent Information
- Application Number
- CN202422413890.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In the existing air-lifting oil production system, the high-pressure valve of the serving device is frequently opened and closed, resulting in severe wear of the valve, short service life, and increasing equipment costs.
A ball-loading device including a ball storage tube, a ball sender, a first pipeline, a second pipeline and an air injection pipeline is designed. By storing a plurality of air lifting balls through the ball storage tube, the valve opening frequency is reduced and the valve wear is reduced.
It extends the service life of the valve, reduces the equipment failure rate and repair and replacement costs, and improves the reliability and efficiency of the serving device.
Smart Images
Figure CN223062422U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil production, and particularly relates to a ball sending device and an oil production system. Background Technique
[0002] In an oil production system that uses gas lift balls for oil production, a ball sending device is used to control the emission frequency of gas lift balls. In the existing ball sending device, high-pressure valves are respectively arranged at the inlet end, the outlet end and the gas injection pipeline of the ball sending device. For each ball sending, multiple valves need to be opened and closed once, so that the high-pressure valves are frequently opened and closed, the valves are severely worn, which seriously affects the service life of the high-pressure valves and increases the equipment cost. Content of the Utility Model
[0003] The purpose of the utility model includes providing a ball sending device and an oil production system, which can reduce the opening frequency of high-pressure valves, reduce wear, is beneficial to extending the service life of the valves and saving costs.
[0004] The embodiments of the utility model can be implemented as follows:
[0005] In a first aspect, the utility model provides a ball sending device, including:
[0006] A ball storage pipe; a first valve is arranged at the inlet of the ball storage pipe;
[0007] A ball sender; a second valve is arranged at the outlet of the ball sender, and the outlet of the ball storage pipe is communicated with the inlet of the ball sender;
[0008] A first pipeline, the outlet of the ball sender is communicated with the first pipeline;
[0009] A second pipeline, the second pipeline is communicated with the first pipeline, and the first pipeline and the second pipeline are connected in a U shape;
[0010] An air injection pipeline, the outlet of the air injection pipeline is communicated with the first pipeline, and a third valve is arranged on the air injection pipeline;
[0011] When the first valve is opened and the second valve is closed, it is used to store gas lift balls into the ball storage pipe; when the second valve is opened and the first valve is closed, the ball sender is used to launch the gas lift balls in the ball storage pipe into the first pipeline; when the third valve is opened, the gas lift balls enter the second pipeline along the first pipeline under the action of the injection pressure and lift the liquid in the second pipeline to the ground.
[0012] In an alternative embodiment, the outlet of the gas injection pipeline is inclined relative to the first pipeline; the running direction of the gas lift ball in the first pipeline is the first direction, and the gas in the gas injection pipeline has a pressure component in the first direction when entering the first pipeline along the outlet.
[0013] In an alternative embodiment, the ball storage pipe is a spiral pipe, the inner diameter of the ball storage pipe is larger than the outer diameter of the gas lift ball and smaller than twice the outer diameter of the gas lift ball.
[0014] In an alternative embodiment, a protective cover is further included, and the ball storage pipe is arranged inside the protective cover.
[0015] In an alternative embodiment, a cleaning tank is further included, the cleaning tank is communicated with the inlet of the ball storage pipe, and the first valve is arranged between the ball storage pipe and the cleaning tank; after the gas lift ball is lifted to the ground along the second pipeline, it enters the cleaning tank, and the cleaning tank is used to clean the gas lift ball.
[0016] In an alternative embodiment, a spiral cleaning pipeline is arranged in the cleaning tank.
[0017] In an alternative embodiment, the inner diameter of the cleaning pipeline is larger than the outer diameter of the gas lift ball and smaller than twice the outer diameter of the gas lift ball.
[0018] In an alternative embodiment, a maintenance opening is arranged on the cleaning tank.
[0019] In an alternative embodiment, a connecting valve for connecting the first pipeline and the second pipeline is arranged between the outlet of the gas injection pipeline and the bottom of the U-shaped pipeline; the gas lift ball descending along the first pipeline can enter the second pipeline through the connecting valve.
[0020] In a second aspect, the present invention provides an oil production system, including the ball sending device as described in any one of the foregoing embodiments.
[0021] In an alternative embodiment, a separation device is further included, the separation device is connected to one end of the second pipeline far from the first pipeline, and is used to separate the gas lift ball from the liquid in the second pipeline; the gas lift ball coming out of the separation device is cleaned and then enters the ball storage pipe.
[0022] The beneficial effects of the ball sending device and the oil production system provided by the embodiments of the present invention include:
[0023] The ball serving device provided by the embodiment of the present utility model is provided with a ball storage pipe at the inlet end of the ball server, and the ball storage pipe can store multiple air lift balls. In this way, when the first valve, the second valve and the third valve are opened once, the ball server can serve balls multiple times. Only after all the multiple air lift balls in the ball storage pipe are served, the second opening is required. This reduces the opening frequency of the first valve, the second valve and the third valve, can reduce the wear of the valves, is beneficial to extending the service life of the valves, and saves costs.
[0024] The oil production system provided by the embodiment of the present utility model includes the above-mentioned ball serving device, which can reduce the wear of the high-pressure valve in the ball serving device, thereby improving the reliability of the ball serving device, reducing the failure rate and maintenance and replacement costs of the high-pressure valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0026] Figure 1 It is a schematic structural diagram of the oil production system provided for this embodiment;
[0027] Figure 2 For Figure 1 It is a schematic structural diagram of the ball storage pipe in
[0028] Reference numerals: 110 - ball storage pipe; 111 - first valve; 113 - protective cover; 120 - ball server; 121 - second valve; 130 - U-shaped pipe; 131 - first pipe; 132 - second pipe; 140 - gas injection pipe; 141 - third valve; 150 - cleaning tank; 151 - cleaning pipe; 153 - water inlet valve; 160 - connecting valve; 200 - oil production system; 210 - separation device; 220 - control valve; 230 - liquid inlet pipe; 231 - check valve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0029] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Accordingly, 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 present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts fall within the scope of protection of the present invention.
[0031] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0032] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is habitually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.
[0033] In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.
[0034] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.
[0035] The overall structure, working principle and achieved technical effects of the ball launching device provided by the present invention will be introduced in detail below through embodiments in combination with the accompanying drawings.
[0036] Please refer to Figure 1 , the ball launching device provided by the embodiment of the present invention is applied to the gas lift oil production system 200. The oil production system 200 includes a U-shaped pipeline 130 provided below the ground. The ball launching device is used to launch a gas lift ball into one end of the underground U-shaped pipeline 130. Under the pushing action of high-pressure gas, the gas lift ball moves downward to the bottom of the U-shaped pipeline 130. Under the continuous pushing of high-pressure gas, the gas lift ball moves upward along the other side of the U-shaped pipeline 130 and lifts the oil at the bottom of the U-shaped pipeline 130 from the bottom of the well to the ground.
[0037] The ball serving device provided in this embodiment includes a ball storage pipe 110, a ball server 120, a first pipeline 131, a second pipeline 132, and an air injection pipeline 140. A first valve 111 is provided at the inlet of the ball storage pipe 110; a second valve 121 is provided at the outlet of the ball server 120, and the outlet of the ball storage pipe 110 is communicated with the inlet of the ball server 120; the outlet of the ball server 120 is communicated with the first pipeline 131. The second pipeline 132 is communicated with the first pipeline 131, and the first pipeline 131 and the second pipeline 132 are connected in a U shape. The outlet of the air injection pipeline 140 is communicated with the first pipeline 131, and a third valve 141 is provided on the air injection pipeline 140. When the first valve 111 is opened and the second valve 121 is closed, it is used to store air lift balls in the ball storage pipe 110; when the second valve 121 is opened and the first valve 111 is closed, the ball server 120 is used to launch the air lift balls in the ball storage pipe 110 into the first pipeline 131; when the third valve 141 is opened, the air lift balls enter the second pipeline 132 along the first pipeline 131 under the action of the injection pressure, and lift the liquid in the second pipeline 132 to the ground. Since the ball storage pipe 110 is provided, the opening and closing frequencies of the first valve 111, the second valve 121, and the third valve 141 can be reduced, which is beneficial to extending the service life of the valves, thereby reducing the equipment failure rate and improving the ball serving reliability. And it is beneficial to reducing the maintenance and replacement costs of high-pressure valves.
[0038] It can be understood that the first valve 111, the second valve 121, and the third valve 141 all work in a high-pressure environment, and in order to control precise ball serving, the accuracy requirements for the valves are relatively high, so the costs of the first valve 111, the second valve 121, and the third valve 141 are relatively expensive. In the current oil production system, high-pressure valves need to be opened and closed frequently. Each time an air lift ball is launched, the high-pressure valve group needs to be opened and closed once. This causes serious wear of the valves, resulting in a high failure rate and high replacement frequency of the high-pressure valves, increasing the cost.
[0039] In this embodiment, since a ball storage pipe 110 is provided at the inlet end of the ball server 120. The ball storage pipe 110 is used to store air lift balls, and multiple air lift balls can be stored in the ball storage pipe 110. In this way, when the first valve 111, the second valve 121, and the third valve 141 are opened once, the ball server 120 can serve balls multiple times. After all the multiple air lift balls in the ball storage pipe 110 are launched, the second opening is required. For example, after launching dozens of air lift balls, the valves are opened and closed only once, which greatly reduces the opening frequencies of the first valve 111, the second valve 121, and the third valve 141, can reduce the wear of the valves, is beneficial to extending the service life of the valves, and saves costs.
[0040] Optionally, the ball storage pipe 110 adopts a spiral pipeline, which can increase the storage quantity of air lift balls in a limited space. Thus, the opening frequencies of the first valve 111, the second valve 121, and the third valve 141 are further reduced.
[0041] In this embodiment, the inner diameter of the ball storage tube 110 is larger than the outer diameter of the air-lift ball and less than twice the outer diameter of the air-lift ball. Such a setting ensures that the air-lift balls in the ball storage tube 110 move orderly one by one, avoiding ball jamming and congestion. This is conducive to ensuring that the ball launcher 120 only launches one air-lift ball each time, improving the serving accuracy and reliability.
[0042] Optionally, the inner diameter of the ball storage tube 110 is 1.2 to 1.5 times the outer diameter of the air-lift ball. This can not only ensure the smooth movement of the air-lift ball in the ball storage tube 110, but also avoid ball jamming and blockage in the ball storage tube 110, improving the serving efficiency and reliability.
[0043] Of course, in some other embodiments, the ball storage tube 110 can also be set to other shapes, such as a stepped shape or other shapes, which are not specifically limited here.
[0044] Combined with Figure 2 , optionally, the serving device further includes a protective cover 113. The ball storage tube 110 is arranged inside the protective cover 113. The protective cover 113 is used to protect the ball storage tube 110. It can be understood that without the protective cover 113, during the installation process or other working conditions, the ball storage tube 110 is easily collided with other components, which is likely to cause the deformation of the ball storage tube 110. After the deformation of the ball storage tube 110, the pipe diameter decreases, and there is a risk that the air-lift ball in the ball storage tube 110 cannot move smoothly. After the protective cover 113 is provided in this embodiment, it can effectively prevent the deformation of the ball storage tube 110, thereby ensuring that the air-lift ball in the ball storage tube 110 can move smoothly and avoiding ball jamming.
[0045] Optionally, the protective cover 113 has the characteristic of high pressure resistance and can be made of metal material. Of course, in some other embodiments, the protective cover 113 can also be made of some other high-strength non-metallic materials, which are not specifically limited here.
[0046] Optionally, the outlet of the gas injection pipeline 140 is arranged at an angle relative to the first pipeline 131. The running direction of the gas lift ball in the first pipeline 131 is the first direction, and the gas in the gas injection pipeline 140 has a pressure component along the first direction when entering the first pipeline 131 along the outlet. In this embodiment, the running direction of the gas lift ball in the second pipeline 132 is the second direction, and the first direction and the second direction are opposite. The outlet direction of the gas injection pipeline 140 is inclined downward, so that the gas injection pipeline 140 and the first pipeline 131 are roughly connected in a Y shape. This arrangement can ensure that the gas lift ball entering the first pipeline 131 from the outlet of the ball launcher 120 can quickly move downward along the first pipeline 131, avoiding the gas lift ball from the ball launcher 120 to move upward and cause blockage. In other words, the high-pressure gas at the outlet of the gas injection pipeline 140 has a pressure component vertically downward along the first pipeline 131, ensuring that the gas lift ball moves downward in the first pipeline 131, improving the moving efficiency of the gas lift ball in the first pipeline 131, and avoiding ball jam or blockage.
[0047] Optionally, the angle A formed by the gas injection pipeline 140 and the first pipeline 131 is about 10 degrees to 70 degrees, which is convenient for pipeline installation and can ensure that the gas lift ball always moves downward along the first pipeline 131 after coming out of the ball launcher 120. The high-pressure gas is natural gas or nitrogen.
[0048] Optionally, the ball-serving device further includes a cleaning tank 150, which is connected to the inlet of the ball storage tube 110, and a first valve 111 is provided between the ball storage tube 110 and the cleaning tank 150. The gas-lifting ball lifts the liquid along the second pipeline 132 to the ground and then enters the cleaning tank 150, and the cleaning tank 150 is used to clean the gas-lifting ball. The cleaning tank 150 cleans the gas-lifting ball and then stores it in the ball storage tube 110. Since the gas-lifting ball carries a large amount of impurities such as silt, oil, and wax after lifting the liquid, once these impurities enter the high-pressure valve, the wear of the valve will be aggravated. Therefore, in this embodiment, a cleaning tank for cleaning the gas-lifting ball is provided, and the cleaned gas-lifting ball can prevent impurities such as silt, wax, etc. from entering the high-pressure valve, thereby avoiding the wear of the valve.
[0049] Optionally, a spiral cleaning pipe 151 is provided in the cleaning tank 150. The cleaning pipe 151 may be a hollow structure, for example, a spiral track formed by multiple steel pipes. The air lift ball entering the cleaning tank 150 moves along the spiral track, and the dirt and sand on the surface of the air lift ball are washed away by cleaning the air lift ball. Sewage and the like can be discharged from the hollow structure formed by the track, so that only a clean air lift ball is left in the cleaning pipe 151. Among them, the cleaning method includes but is not limited to soaking in washing liquid, flushing, and gas drying.
[0050] Optionally, the inner diameter of the cleaning pipeline 151 is larger than the outer diameter of the air-lift ball and smaller than twice the outer diameter of the air-lift ball. The air-lift balls are arranged in an orderly manner in the cleaning pipeline 151 to ensure that the air-lift balls can move smoothly in the cleaning pipeline 151 without ball jamming or congestion. In this embodiment, the inner diameter of the cleaning pipeline 151 is 1.2 to 1.5 times the outer diameter of the air-lift ball.
[0051] Optionally, the number of air-lift balls that can be accommodated in the cleaning pipeline 151 is less than or equal to the number of air-lift balls that can be accommodated in the ball storage pipe 110. After one cleaning is completed in this way, all the air-lift balls after cleaning can be stored in the ball storage pipe 110, improving the cleaning operation efficiency.
[0052] Optionally, a maintenance port is provided on the cleaning tank 150. The maintenance port facilitates the removal of damaged air-lift balls and the addition of new air-lift balls. In addition, the maintenance port facilitates the maintenance operation of the cleaning tank.
[0053] In this embodiment, various sensors are provided inside the air-lift ball, which can collect and store various data signals during the lifting operation. After the air-lift ball is cleaned in the cleaning tank 150, the main control unit can read the data signals of each air-lift ball to facilitate the real-time adjustment of the operation conditions, such as adjusting the ball sending frequency, injection pressure or other relevant parameters, which are not specifically limited here.
[0054] Optionally, a connection valve 160 is provided in the middle of the first pipeline 131 and the second pipeline 132. The middle here refers to the position between the outlet of the injection pipeline 140 and the bottom of the U-shaped pipeline 130, and the connection valve 160 is used to selectively connect the first pipeline 131 and the second pipeline 132.
[0055] It is easy to understand that in the case where the connection valve 160 is not provided, the first pipeline 131 and the second pipeline 132 can only be connected at the U-shaped bottom, that is, the air-lift ball needs to reach the U-shaped bottom each time to turn back upward along the second pipeline 132 to lift the oil. In this way, the empty stroke of the air-lift ball descending along the first pipeline 131 is relatively long and the efficiency is not high. And starting to lift the oil from the bottom of the second pipeline 132, the height of the lifted liquid column is relatively high, and the required lifting force is relatively large, that is, a high enough injection pressure is required, so that the power of the compressor for producing high-pressure gas is relatively high and the starting pressure is large. In this embodiment, however, a connection valve 160 is provided in the middle of the first pipeline 131 and the second pipeline 132. During the descending process of the air-lift ball, it does not need to descend to the bottom, and can turn back upward from the connection valve 160 to the second pipeline 132 in the middle. In this way, the height of the lifted liquid column is easy to control, which is beneficial to reducing the injection pressure, reducing the compressor power and starting pressure, saving energy consumption and prolonging the service life of the compressor. And the empty stroke of the air-lift ball descending is relatively short and the operation efficiency is higher.
[0056] Optionally, a plurality of connecting valves 160 may be arranged at intervals in the middle of the first pipeline 131 and the second pipeline 132. For example, connecting valves 160 are provided at different depths. According to actual operation requirements, the opening and closing of each connecting valve 160 are controlled, which is beneficial to controlling the return depth of the gas lift ball, thereby improving operation efficiency, reducing starting pressure, saving energy consumption, and saving costs.
[0057] The embodiment of the present utility model further provides an oil production system 200, including a separation device 210 and the foregoing ball sending device. The separation device 210 is connected to one end of the second pipeline 132 far from the first pipeline 131, and is used to separate the gas lift ball and the liquid in the second pipeline 132. The gas lift ball coming out of the separation device 210 enters the ball storage pipe 110 after being cleaned.
[0058] Optionally, the outlet of the separation device 210 is communicated with the inlet of the cleaning tank 150, and a control valve 220 is provided therebetween. The water inlet of the cleaning tank 150 is provided with a water inlet valve 153.
[0059] Optionally, a liquid inlet pipe 230 is provided at the bottom of the U-shaped pipeline 130 formed by connecting the first pipeline 131 and the second pipeline 132. The liquid inlet pipe 230 is used to introduce oil liquid in the bottom layer into the U-shaped pipeline 130. A check valve 231 is provided on the liquid inlet pipe 230 to ensure that the oil liquid can only enter the U-shaped pipeline 130 unidirectionally.
[0060] In the oil production system 200 provided in this embodiment, its working principle is as follows:
[0061] A plurality of cleaned gas lift balls are stored in the ball storage pipe 110, and the first valve 111 is closed. The second valve 121 and the third valve 141 are opened. The ball sender 120 controls the emission frequency of the gas lift ball, and only one gas lift ball is emitted each time. The third valve 141 can be in an open state for a long time. The gas lift ball runs downward along the first pipeline 131 under the thrust of high-pressure gas, enters the second pipeline 132 through the connecting valve 160 at the bottom or middle of the U-shaped pipeline 130, and continues to move upward along the second pipeline 132 under the thrust of high-pressure gas, lifting the liquid column in the second pipeline 132 to the ground. After passing through the separation device 210, the liquid and the gas lift ball are separated, and the gas lift ball enters the cleaning tank 150. After the gas lift balls in the cleaning tank 150 reach a certain number, the cleaning operation starts. After all the gas lift balls in the ball storage pipe 110 are emitted, the second valve 121 is closed, and the first valve 111 is opened. The cleaned gas lift balls are stored in the ball storage pipe 110.
[0062] In summary, the ball sending device and the oil production system 200 provided in the embodiment of the present utility model have the following beneficial effects:
[0063] In this ball serving device, by providing the ball storage pipe 110, the opening frequency of the first valve 111, the second valve 121 and the third valve 141 is greatly reduced, the wear of the valves is decreased, and the service life of the valves is prolonged. By providing the cleaning tank 150, the sand, dirt, etc. carried by the air lift ball are prevented from entering the valves to exacerbate the wear of the valves. The gas injection pipeline 140 is inclined to ensure that the air lift ball moves downward in the first pipeline 131, improving the operation efficiency. By providing the connecting valve 160 to connect the first pipeline 131 and the second pipeline 132 at different depths, it is beneficial to control the return depth of the air lift ball, improve the operation efficiency, reduce the gas injection pressure, save energy consumption, and reduce costs.
[0064] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.
Claims
1. A serving device, characterized in that, Comprising: A ball storage tube (110); a first valve (111) is provided at the inlet of the ball storage tube (110); A ball launcher (120); a second valve (121) is provided at the outlet of the ball launcher (120), and the outlet of the ball storage tube (110) is communicated with the inlet of the ball launcher (120); A first pipeline (131), the outlet of the ball launcher (120) is communicated with the first pipeline (131); A second pipeline (132), the second pipeline (132) is communicated with the first pipeline (131), and the first pipeline (131) and the second pipeline (132) are connected to form a U-shaped pipeline (130); An air injection pipeline (140), the outlet of the air injection pipeline (140) is communicated with the first pipeline (131), and a third valve (141) is provided on the air injection pipeline (140); When the first valve (111) is opened and the second valve (121) is closed, it is used to store air lift balls into the ball storage tube (110); when the second valve (121) is opened and the first valve (111) is closed, the ball launcher (120) is used to launch the air lift balls in the ball storage tube (110) into the first pipeline (131); when the third valve (141) is opened, the air lift balls enter the second pipeline (132) along the first pipeline (131) under the action of the air injection pressure, and lift the liquid in the second pipeline (132) to the ground.
2. The serving device according to claim 1, characterized in that The outlet of the air injection pipeline (140) is inclined relative to the first pipeline (131); the running direction of the air lift balls in the first pipeline (131) is the first direction, and the gas in the air injection pipeline (140) has a pressure component along the first direction when entering the first pipeline (131) from the outlet.
3. The serving device according to claim 1, wherein The ball storage tube (110) adopts a spiral pipeline, the inner diameter of the ball storage tube (110) is larger than the outer diameter of the air lift balls and smaller than twice the outer diameter of the air lift balls.
4. The serving device according to claim 1, characterized in that, It further includes a protective cover (113), and the ball storage tube (110) is arranged inside the protective cover (113).
5. The serving device according to claim 1, wherein, It further includes a cleaning tank (150), the cleaning tank (150) is communicated with the inlet of the ball storage tube (110), and the first valve (111) is arranged between the ball storage tube (110) and the cleaning tank (150); after the air lift balls are lifted to the ground along the second pipeline (132), they enter the cleaning tank (150), and the cleaning tank (150) is used to clean the air lift balls.
6. The serving device according to claim 5, characterized in that, A spiral cleaning pipeline (151) is arranged in the cleaning tank (150).
7. The serving device according to claim 6, wherein, The inner diameter of the cleaning pipeline (151) is larger than the outer diameter of the air lift balls and smaller than twice the outer diameter of the air lift balls.
8. The serving device according to claim 5, wherein, An inspection opening is provided on the cleaning tank (150).
9. The serving device according to any one of claims 1 to 8, characterized in that, A communication valve (160) for communicating the first pipe (131) and the second pipe (132) is provided between the outlet of the gas injection pipe (140) and the bottom of the U-shaped pipe (130); the gas lift ball descending along the first pipe (131) can enter the second pipe (132) through the communication valve (160).
10. An oil production system (200), characterized in that, It includes the ball sending device according to any one of claims 1 to 9.