Gas lift system separation assembly and gas lift system

Abstract

The utility model provides a gas lift system separation assembly and a gas lift system, and relates to the technical field of gas lift oil extraction. The gas lift system separation assembly comprises a separation tank and a control valve. The separation tank is provided with a separation cavity, and an inlet, a liquid outlet and a ball outlet which are respectively communicated with the separation cavity. And the control valve is arranged in the separation cavity. The control valve comprises a valve body and a valve plate; the valve body is provided with a through hole communicated with the ball outlet, and the valve plate is movably arranged on the valve body so as to open or close the through hole. And the position of the valve plate is higher than that of the liquid outlet. In the gas lift system separation assembly, the control valve is arranged in the separation cavity, and the position of the valve plate is higher than the liquid outlet, so that impurity particles entering the control valve can be effectively reduced, and the service life of the control valve can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas lift oil production technical field especially is related to a gas lift system separation subassembly and gas lift system. BACKGROUND

[0002] In the prior art gas lift oil production system, the gas lift ball and liquid separation device, the valve controlling the ball outlet switch is usually arranged on the oil pipe, and the oil pipe connected with the ball outlet is usually connected below the separation tank. That is, the valve is located outside the separation tank body. Such arrangement is prone to cause a large amount of impurities and particles in the liquid to enter the valve, resulting in blockage and severe wear of the valve, reduced reliability, and high failure rate. SUMMARY

[0003] The utility model discloses a gas lift system separation subassembly and gas lift system, which is beneficial to improve the reliability of the control valve, reduce the failure rate and prolong the service life of the control valve.

[0004] In a first aspect, the utility model provides a kind of gas lift system separation subassembly, comprising:

[0005] Separation tank;The separation tank is equipped with separation cavity and respectively with the inlet, liquid outlet and ball outlet of separation cavity communication;

[0006] Control valve, the control valve is arranged in the separation cavity;

[0007] The control valve includes valve body and valve plate;The valve body is equipped with the through hole being communicated with the ball outlet, and the valve plate is movably arranged on the valve body to open or close the through hole;

[0008] The position of the valve plate is higher than the position of the liquid outlet.

[0009] In optional implementation, the valve body is equipped with chute, and the valve plate is movably arranged in the chute;The moving direction of the valve plate is perpendicular to the axis of the through hole;

[0010] And / or, the valve plate is connected with elastic member.

[0011] In optional implementation, the valve body is equipped with first guide slope at the end away from the ball outlet, and the first guide slope is used to guide the fluid on the surface of the valve body to the liquid outlet;

[0012] And / or, the separation tank includes bottom wall, and the bottom wall is equipped with second guide slope on the side towards the separation cavity, and the second guide slope is used to guide the fluid on the bottom wall to the liquid outlet.

[0013] In an optional embodiment, the separation cavity is provided with a separation track, one end of the separation track is connected with the inlet, and the other end is connected with the ball outlet; and the separation track is provided with a liquid discharge channel.

[0014] In an optional embodiment, the separation track is provided with a protective cover at the end close to the ball outlet.

[0015] In an optional embodiment, the inlet is connected with a flow guide pipe, the flow guide pipe is located in the separation cavity, and the outlet of the flow guide pipe is misaligned with the ball outlet.

[0016] In an optional embodiment, the inlet and the ball outlet are misaligned.

[0017] In an optional embodiment, the liquid inlet pipe is provided with a detector, and the detector is used to detect whether the gas lift ball passes through the liquid inlet pipe.

[0018] In an optional embodiment, the liquid inlet pipe is provided with a pipe joint, and the pipe joint is used to connect two adjacent pipes in the axial direction.

[0019] In an optional embodiment, the gas lift system further comprises a liquid inlet pipe connected with the inlet, and the liquid inlet pipe is provided with a separation pipe.

[0020] The separation pipe comprises a main pipe and a branch pipe connected to the main pipe, a filter plate is arranged at the connection between the main pipe and the branch pipe, a part of the fluid in the main pipe passes through the filter plate, and the branch pipe is connected with the liquid inlet pipe.

[0021] In an optional embodiment, the filter plate is in the shape of a circular arc, and the filter plate and the branch pipe are connected in a circular arc transition mode.

[0022] In a second aspect, the utility model provides a gas lift system, comprising the gas lift system separation assembly of any one of the preceding embodiments.

[0023] The gas lift system separation assembly and the gas lift system provided by the embodiments of the utility model have the following beneficial effects:

[0024] The gas lift system separation assembly provided by the embodiments of the utility model has the control valve arranged in the separation cavity, and the structure is compact. The position of the valve plate is higher than the liquid outlet, which can effectively reduce the impurity particles entering the control valve, and is beneficial to prolong the service life of the control valve. The movable valve plate is used to open and close the through hole, and the structure is simple and reliable, and the cost is lower, which is beneficial to save the cost.

[0025] The gas lift system provided by the embodiments of the utility model comprises the above-mentioned gas lift system separation assembly, can effectively reduce the impurity particles entering the control valve, is beneficial to prolong the service life of the control valve, and is beneficial to reduce the cost. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings described in the following are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0027] Figure 1 The overall structure schematic diagram of the separation tank is provided for the embodiments of the present application.

[0028] Figure 2 The exploded structure schematic diagram of the separation tank is provided for the embodiments of the present application.

[0029] Figure 3 The cross-sectional structure schematic diagram of the separation tank is provided for the embodiments of the present application.

[0030] Figure 4 The structure schematic diagram of the control valve of the separation tank is provided for the embodiments of the present application.

[0031] Figure 5 The structure schematic diagram of the control valve of the separation tank from another perspective is provided for the embodiments of the present application.

[0032] Figure 6 The structure schematic diagram of the connection between the control valve and the first driving member of the separation tank is provided for the embodiments of the present application.

[0033] Figure 7 The structure schematic diagram of the separation assembly of the gas lifting system is provided for the embodiments of the present application.

[0034] Figure 8 The structure schematic diagram of the separation pipe of the separation assembly of the gas lifting system is provided for the embodiments of the present application.

[0035] Figure 9 The cross-sectional structure schematic diagram of the separation pipe of the separation assembly of the gas lifting system is provided for the embodiments of the present application.

[0036] Icons: 110-Separation tank; 101-Separation chamber; 111-Inlet; 112-Outlet; 113-Ball outlet; 114-Bottom wall; 115-Second guide slope; 116-Ball outlet pipe; 120-Control valve; 121-Valve body; 122-Through hole; 123-Slide groove; 124-First guide slope; 125-Valve plate; 126-Elastic element; 127-Drive element; 130-Separation track; 140-Inlet pipe; 150-Separation pipe; 151-Main pipe; 152-Branch pipe; 153-Filter plate; 154-Filter hole; 160-Detector; 170-Pipe connector; 200-Air lift ball. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0044] Please combine Figures 1 to 4 The present invention provides a gas lift system separation component, which can be applied in a gas lift system. The gas lift system separation component is used to separate the gas lift ball 200 lifted from the well to the surface from the liquid.

[0045] The gas lift system separation assembly includes a separation tank 110 and a control valve 120. The separation tank 110 has a separation chamber 101 and an inlet 111, an outlet 112, and a ball outlet 113, all communicating with the separation chamber 101. The control valve 120 is located within the separation chamber 101. The control valve 120 includes a valve body 121 and a valve plate 125; the valve body 121 has a through hole 122 communicating with the ball outlet 113, and the valve plate 125 is movably mounted on the valve body 121 to open or close the through hole 122. The valve plate 125 is positioned higher than the outlet 112. In this gas lift system separation assembly, the control valve 120 is located within the separation chamber 101, resulting in a compact structure and small footprint. Furthermore, the higher position of the valve plate 125 compared to the outlet 112 effectively reduces the entry of impurity particles into the control valve 120, thus extending its service life. The control valve 120 uses a movable valve plate 125 to open and close the through hole 122. It has a simple and reliable structure. Compared with ball valves, which are more sensitive to impurities and particles, the control valve 120 in this embodiment has a lower cost, which helps to save costs.

[0046] Optionally, the valve body 121 is provided with a slide groove 123, and the valve plate 125 is movably disposed within the slide groove 123; the moving direction of the valve plate 125 is perpendicular to the axis of the through hole 122. In this embodiment, the valve plate 125 is connected to a driving member 127, which can drive the valve plate 125 to move within the slide groove 123. Optionally, the driving member 127 can be a motor or the like.

[0047] Combination Figure 5 and Figure 6 Optionally, the valve plate 125 is connected to an elastic element 126. The elastic element 126 can be a spring, a sheet, or other elastic components. If the valve plate 125 wears during use, the displacement can be automatically compensated by the elastic force of the elastic element 126 to ensure a tight seal against the valve body 121 and good sealing performance. Of course, a corresponding sealing ring or similar material can also be provided on the inner wall of the through hole 122 to improve the sealing performance of the structure.

[0048] Optionally, a first guide slope 124 is provided at the end of the valve body 121 away from the ball outlet 113. The first guide slope 124 is used to guide the fluid on the surface of the valve body 121 to the liquid outlet 112. The first guide slope 124 makes it less likely for impurities, particles and other contaminants to accumulate on the surface of the valve body 121, reducing the probability of impurities, particles and other contaminants entering the valve body 121. This can reduce the wear of the valve plate 125 and the valve body 121, improve the reliability of the movement of the valve plate 125, prevent the through hole 122 of the valve body 121 from being blocked, and help extend the service life of the control valve 120.

[0049] Optionally, the separator 110 includes a bottom wall 114, side walls, and a cover. The bottom wall 114 is connected to the side walls, which are attached to the periphery of the bottom wall 114. The bottom wall 114 and the cover are positioned opposite each other, with the cover attached to the end of the side wall away from the bottom wall 114. The bottom wall 114, the cover, and the side walls together form a separator 101. An outlet 112 is provided on the bottom wall 114. A second guide slope 115 is provided on the side of the bottom wall 114 facing the separator 101, which guides the fluid in the bottom wall 114 to the outlet 112. In other words, the bottom of the separator 101 is inclined, which facilitates the discharge of contaminants and reduces the accumulation of impurities and contaminants in dead corners after separation. This improves the separation effect, enhances the reliability of the control valve 120, and extends its service life.

[0050] Optionally, a separation track 130 is provided inside the separation chamber 101. One end of the separation track 130 is connected to the inlet 111, and the other end is connected to the outlet 113. A drainage channel is provided on the separation track 130. In this embodiment, the separation track 130 is a spiral track. The diameter of the separation track 130 is larger than the outer diameter of the air-lift ball 200, but less than twice the outer diameter of the air-lift ball 200. This ensures that the air-lift balls 200 can pass through the separation track 130 one by one, preventing blockage and jamming of the air-lift balls 200 and improving the smoothness of their passage. Optionally, the diameter of the separation track 130 is 1.2 to 1.8 times the outer diameter of the air-lift ball 200. The spiral track design can increase the capacity of the air-lift ball 200, help decelerate the air-lift ball 200 during movement, and achieve higher separation efficiency. It also helps to prevent large collision impact forces between the air-lift balls 200, which could cause deformation or damage to the air-lift balls 200.

[0051] The separation track 130 is constructed from multiple parallel steel pipes spaced at intervals. The gaps between adjacent steel pipes form drainage channels, facilitating liquid separation. Alternatively, in other embodiments, the separation track 130 can be a perforated pipe with perforations serving as drainage channels. Or, drainage holes can be opened in the pipe as drainage channels; no specific limitation is made here. Furthermore, the material of the separation track 130 is not limited to steel pipes and can be other materials.

[0052] Optionally, a heating device, such as a heating wire, is provided on the separation track 130 to heat the separation track 130. This facilitates the removal of oil, wax, etc. from the surface of the air-lift ball 200, making it easier to clean the air-lift ball 200 subsequently.

[0053] Optionally, the inlet 111 and outlet 113 of the separator 110 are staggered. This arrangement prevents impurities, particles, and other contaminants on the surface of the dirty air-lift ball 200 from falling directly into the valve body 121 when it enters the separator 110 directly from the inlet 111, thus avoiding blockage and severe wear of the valve body 121.

[0054] Optionally, a protective cover is provided at the end of the separation track 130 near the ball outlet 113; and / or, a guide pipe is connected to the inlet 111, and the guide pipe is located inside the separation chamber 101; the outlet of the guide pipe and the ball outlet 113 are offset. It can be understood that if a protective cover is provided, it can protect the through hole 122 on the valve body 121, preventing liquid containing a large amount of mud, sand, impurities, and other particles at the inlet 111 from directly falling into the valve body 121. Of course, the protective cover also buffers, slows down, and guides the air-lift ball 200, facilitating its smooth passage. If a guide pipe is provided, the end of the separation track 130 near the inlet 111 is connected to the guide pipe. The guide pipe can effectively prevent liquid containing a large amount of mud, sand, impurities, and other particles at the inlet 111 from directly falling into the valve body 121.

[0055] It should be noted that either the protective cover or the guide tube may be provided. In some embodiments, both the protective cover and the guide tube may be provided; this is not specifically limited here.

[0056] Combination Figure 7 Optionally, the air lift system separation assembly also includes an inlet pipe 140 connected to the inlet 111. The inlet pipe 140 is equipped with a separation pipe 150, which serves as a pre-liquid separation unit. This allows minimal liquid to enter the separation tank 110, improving separation efficiency and reducing the size of the separation tank 110. The separation tank 110 does not need to be too large, resulting in a more compact structure, easier installation and maintenance, and ultimately lower costs for the entire separation assembly.

[0057] Combination Figure 8 and Figure 9 The separation pipe 150 includes a main pipe 151 and a branch pipe 152 connected to the main pipe 151. A filter plate 153 is provided at the junction of the main pipe 151 and the branch pipe 152, through which the fluid in the main pipe 151 passes. The branch pipe 152 is connected to the inlet pipe 140. It should be understood that one end of the main pipe 151 is connected to the downhole pipeline, and the other end is connected to the liquid collection container. After the filter plate 153 is installed, only liquid can pass through the filter plate 153, and the air lift ball 200 cannot pass through the filter plate 153. Optionally, the filter plate 153 is provided with some filter holes 154, the diameter of which is smaller than the outer diameter of the air lift ball 200.

[0058] Optionally, the filter plate 153 is arc-shaped, and the filter plate 153 and the branch pipe 152 are connected by an arc transition. This can reduce impact. Of course, in some embodiments, the filter plate 153 can also be designed with other shapes or structures, which are not specifically limited here.

[0059] It should be noted that the separator 150 only serves a pre-separation function and cannot completely separate the air-lifted balls and liquid. In other words, after the air-lifted balls 200 and the liquid enter the main pipe 151, a portion of the liquid passes through the filter plate 153 and enters the liquid collection container, while a portion of the liquid, along with the air-lifted balls 200, enters the separator 110 through the branch pipe 152. Inside the separator 110, the liquid is discharged into the liquid collection container through the outlet 112, and the air-lifted balls 200 move along the separator track 130 and are arranged sequentially on the separator track 130. When the control valve 120 is opened, the air-lifted balls 200 sequentially and individually enter the subsequent cleaning tank for cleaning.

[0060] In this embodiment, the number of separation tubes 150 can be one or more. If there are multiple tubes, they are distributed at intervals along the axial direction of the liquid inlet tube 140, which can achieve multiple pre-separations. This can minimize the amount of liquid entering the separation tank 110, thereby improving the separation efficiency.

[0061] Optionally, a detector 160 is provided on the inlet pipe 140; the detector 160 is used to detect whether the gas lift ball 200 is passing through the inlet pipe 140, and can detect the frequency at which the gas lift ball 200 passes through the inlet pipe 140. It is understood that when the valve plate 125 of the control valve 120 is closed, it needs to ensure that no gas lift ball 200 is passing through the inlet pipe 140, thus preventing the gas lift ball 200 from being damaged during the closing process of the valve plate 125. In the entire gas lift system, by detecting the return frequency of the gas lift ball 200, the ball launching frequency can be better adjusted according to the return frequency to improve the downhole fluid collection efficiency.

[0062] Optionally, the inlet pipe 140 is equipped with a pipe fitting 170, which is used to connect two axially adjacent pipe sections. The pipe fitting 170 facilitates the connection of the two pipes, allowing for convenient and reliable connection even with some allowable processing and installation errors. This pipe fitting 170 can be used on the ball outlet pipe 116, the inlet pipe 140, the separator pipe 150, and any other pipes requiring connection, offering strong adaptability and flexibility.

[0063] This utility model embodiment also provides an air lift system, including a cleaning tank and the aforementioned air lift system separation component. It is readily understood that the cleaning tank is connected to the outlet pipe 116. After the control valve 120 is opened, the separated air lift ball 200 enters the cleaning tank along the outlet pipe 116 for cleaning. The cleaned air lift ball 200 will then be reinserted into the oil pipe for the next round of liquid lift operations.

[0064] In summary, the air lift system separation component and air lift system provided in this embodiment of the present invention have the following beneficial effects, including:

[0065] The air lift system separation component provided in this embodiment of the utility model has a control valve 120 located within the separation chamber 101, resulting in a compact structure. Furthermore, the valve plate 125 is positioned higher than the liquid outlet 112, effectively reducing the entry of impurity particles into the control valve 120 and extending its service life. The control valve 120 uses a movable valve plate 125 to open and close the through hole 122, resulting in a simple, reliable, and lower-cost structure, thus saving costs. By incorporating a separation pipe 150, pre-separation can be performed, minimizing the amount of liquid entering the separation tank 110 and improving separation efficiency.

[0066] The air lift system provided in this embodiment of the present invention includes the air lift system separation component described above, which can effectively reduce the entry of impurity particles into the control valve 120, which is beneficial to extending the service life of the control valve 120 and reducing costs.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Any modifications, equivalent substitutions, improvements, etc., should be included within the protection scope of this utility model.

Claims

1. A separation component for an air lift system, characterized in that, include: Separating tank (110); the separating tank (110) is provided with a separating chamber (101) and an inlet (111), an outlet (112) and a ball outlet (113) respectively communicating with the separating chamber (101); A control valve (120) is disposed in the separation chamber (101); The control valve (120) includes a valve body (121) and a valve plate (125); the valve body (121) is provided with a through hole (122) communicating with the ball outlet (113), and the valve plate (125) is movably disposed on the valve body (121) to open or close the through hole (122); The valve plate (125) is located at a position higher than the liquid outlet (112).

2. The air lift system separation component according to claim 1, characterized in that, The valve body (121) is provided with a sliding groove (123), and the valve plate (125) is movably disposed in the sliding groove (123); the moving direction of the valve plate (125) is perpendicular to the axis of the through hole (122); And / or, the valve plate (125) is connected to an elastic element (126).

3. The air lift system separation component according to claim 1, characterized in that, The valve body (121) is provided with a first guide slope (124) at one end away from the ball outlet (113). The first guide slope (124) is used to guide the fluid on the surface of the valve body (121) to the liquid outlet (112). And / or, the separation tank (110) includes a bottom wall (114) with a second guide slope (115) on the side of the bottom wall (114) facing the separation chamber (101), the second guide slope (115) being used to guide the fluid of the bottom wall (114) to the outlet (112).

4. The air lift system separation component according to claim 1, characterized in that, The separation chamber (101) is provided with a separation track (130), one end of which is connected to the inlet (111) and the other end is connected to the ball outlet (113); the separation track (130) is provided with a drainage channel.

5. The air lift system separation component according to claim 4, characterized in that, The separation track (130) is provided with a protective cover at one end near the ball outlet (113); And / or, the inlet (111) is connected to a guide tube, which is located inside the separation chamber (101); the outlet of the guide tube and the ball outlet (113) are misaligned.

6. The air lift system separation component according to claim 1, characterized in that, The inlet (111) and the outlet (113) are misaligned.

7. The air lift system separation component according to any one of claims 1 to 6, characterized in that, It also includes an inlet pipe (140) connected to the inlet (111); the inlet pipe (140) is provided with a separation pipe (150); The separation pipe (150) includes a main pipe (151) and a branch pipe (152) connected to the main pipe (151). A filter plate (153) is provided at the junction of the main pipe (151) and the branch pipe (152). The fluid in the main pipe (151) passes through the filter plate (153). The branch pipe (152) is connected to the inlet pipe (140).

8. The air lift system separation component according to claim 7, characterized in that, The filter plate (153) is arc-shaped, and the filter plate (153) and the branch pipe (152) are connected by an arc transition.

9. The air lift system separation component according to any one of claims 1 to 6, characterized in that, It also includes an inlet pipe (140) connected to the inlet (111); the inlet pipe (140) is equipped with a detector (160); the detector (160) is used to detect whether an air-lift ball (200) passes through the inlet pipe (140); And / or, the inlet pipe (140) is provided with a pipe fitting (170), which is used to connect two adjacent pipe sections in the axial direction.

10. An air-lift system, characterized in that, Includes the air lift system separation component as described in any one of claims 1 to 9.

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