Gravity separator sand discharging and blocking removing device and gravity separator thereof
By designing a sand removal and deblocking device for gravity separator, the sand discharge pipe and gate valve system are used to discharge the separator's silt and sand, the problem of poor discharge caused by sand accumulation in the gravity separator is solved, and efficient sand cleaning operation without shutting down the gravity separator is achieved, ensuring the normal production of the gas well.
Patent Information
- Application Number
- CN202422046825.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-22
AI Technical Summary
During the gas production process of oil and gas fields, too much sand accumulates at the bottom of the effluent pack of the gravity separator, resulting in poor discharge and in severe cases, which will affect the discharge efficiency of the gravity separator, and even lead to liquid bleeding in pipelines, affecting gas well production. The prior art requires the removal of the blind plate at the bottom of the effusion pack regularly, which is complicated to operate and requires the gravity separator to be shut down, affecting the normal production of the gas well.
A gravity separator sand removal and unblocking device is designed, including a sand discharge pipe, a first flange, a first gate valve and a throttle valve. The first flange is connected to the bottom of the effusion bag of the gravity separator, and the silt and sand in the effusion bag are discharged using the sand drain pipe and gate valve system to avoid internal blockage of the effusion bag, and realize the sand cleaning operation without shutting down the gravity separator.
This device simplifies the sand discharge operation process, avoids the cumbersome operation and the problem of gravity separator shutdown, ensures the normal production of the gas well, and avoids the impact of the sand discharge process on gas well production.
Smart Images
Figure CN222991506U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas production technology in oil and gas fields, and particularly relates to a sand discharging and plugging removal device for a gravity separator and the separator thereof. Background Art
[0002] During the gas production process in oil and gas fields, both the amount of injected fluid and the amount of added sand in the volume fracturing process increase significantly. The amount of injected fluid in volume fracturing is about 2.5 - 15 times that of conventional pressure, and the amount of sand injected into the ground is about 3.5 - 18 times that of conventional fracturing. While significantly increasing the single - well production, the volume fracturing process will generate a large - scale proppant backflow during the liquid drainage and production process.
[0003] Gas wells using the volume fracturing process have a large amount of sand production, resulting in frequent leakage and blockage in the gas production process, especially excessive sand accumulation inside the gravity separator, which will cause the bottom liquid - accumulating package to be piled up with sediment, resulting in poor liquid drainage. In severe cases, liquid cannot be drained, affecting the liquid - drainage efficiency of the gravity separator and even causing liquid cross - flow in the pipeline, affecting the production of gas wells. Therefore, it is necessary to regularly remove the blind plate at the bottom of the liquid - accumulating package to discharge the sediment inside the liquid - accumulating package. Such a sand - cleaning method is cumbersome to operate and also requires shutting down the gravity separator, affecting the normal production of gas wells.
[0004] Therefore, there is a need for a technical solution to solve the technical problems that in the sand - cleaning operation of the gravity separator, it is necessary to remove the blind plate at the bottom of its liquid - accumulating package, resulting in cumbersome operation and also requiring shutting down the gravity separator, affecting the normal production of gas wells. Content of the Utility Model
[0005] The purpose of the utility model is to overcome the technical problems that in the sand - cleaning operation of the gravity separator, it is necessary to remove the blind plate at the bottom of its liquid - accumulating package, resulting in cumbersome operation and also requiring shutting down the gravity separator, affecting the normal production of gas wells, and to provide a sand discharging and plugging removal device for a gravity separator and the gravity separator thereof.
[0006] In the first aspect, the utility model provides a sand discharging and plugging removal device for a gravity separator, including a sand discharging pipe. The end of the sand discharging pipe is connected with a first flange, and the first flange is connected to the bottom of the liquid - accumulating package of the gravity separator. A first gate valve and a throttle valve are arranged on the sand discharging pipe, and the first gate valve is arranged between the throttle valve and the first flange.
[0007] A sand discharging and blockage removing device for a gravity separator of the utility model. When in use, the sand discharging pipe is connected to the liquid accumulation package at the bottom of the gravity separator through the first flange at its end. The liquid containing sediment accumulates at the bottom of the liquid accumulation package, and most of the liquid is discharged through the liquid discharging pipe on the side of the liquid accumulation package. When a certain amount of sediment accumulates at the bottom of the liquid accumulation package, the first gate valve on the sand discharging pipe is opened, and the liquid discharging speed is regulated through the throttle valve to discharge the sediment in the liquid accumulation package, avoiding blockage inside the liquid accumulation package. The sand discharging operation is simple and does not require shutting down the gravity separator, ensuring the normal production of the gas well.
[0008] Preferably, a second gate valve is provided on the sand discharging pipe, and the second gate valve is arranged between the first gate valve and the throttle valve.
[0009] Both the first gate valve and the second gate valve play a shut-off role for the sand discharging pipe. When a failure occurs in the first gate valve or the second gate valve, the other gate valve can still play a shut-off role for the sand discharging pipe, avoiding leakage.
[0010] Preferably, a first pressure gauge is provided on the sand discharging pipe, and the first pressure gauge is arranged between the first gate valve and the gravity separator.
[0011] During the normal sand discharging process when the first gate valve, the second gate valve and the throttle valve are opened, the first pressure gauge monitors the pressure at the front end of the sand discharging pipe in real time. If the pressure data detected by the first pressure gauge fluctuates greatly, it can be judged that there is a blockage in the pipeline of the sand discharging pipe, which is convenient for the operators to take pipe unblocking measures in time to ensure the rapid and effective progress of the sand discharging operation.
[0012] Preferably, a second pressure gauge is further provided on the sand discharging pipe, and the second pressure gauge is arranged on the side of the throttle valve away from the first gate valve.
[0013] The second pressure gauge is arranged at the rear end of the sand discharging pipe and monitors the pressures at both ends of the sand discharging pipe simultaneously with the first pressure gauge, so that when a blockage occurs, the first pressure gauge or the second pressure gauge can be promptly responsive, shortening the time for the operators to detect the failure and being beneficial to quickly restoring the normal sand discharging operation of the sand discharging pipe.
[0014] Preferably, an air charging pipe is connected to the sand discharging pipe, and a ball valve is connected to the air charging pipe.
[0015] When the sand discharging pipe is blocked, nitrogen can be filled into the sand discharging pipe through the air charging pipe, and the nitrogen flushes the sediment inside the sand discharging pipe to achieve the purpose of dredging the sand discharging pipe.
[0016] Preferably, the air charging pipe is arranged between the second gate valve and the throttle valve.
[0017] The operation of inflating and unblocking can be carried out avoiding the first gate valve and the second gate valve, improving the efficiency of the unblocking operation.
[0018] In a second aspect, the present utility model provides a gravity separator, which includes a separator body. A liquid accumulation package is provided at the bottom of the separator body, and a second flange is connected to the bottom of the liquid accumulation package. The gravity separator also includes a sand discharging and plugging removing device for the gravity separator as described above, and the first flange is connected to the second flange.
[0019] When the gravity separator of the present utility model is in use, the sediment separated by the gravity separator accumulates in the liquid accumulation package. After a certain amount of sediment accumulates at the bottom of the liquid accumulation package, the first gate valve on the sand discharging pipe is opened, and the liquid discharging speed is regulated through the throttle valve to discharge the sediment in the liquid accumulation package, avoiding blockage inside the liquid accumulation package. The sand discharging operation is simple and does not require shutting down the gravity separator, ensuring the normal production of the gas well.
[0020] Preferably, a liquid discharging pipe is connected to the side of the liquid accumulation package. A third gate valve and a first sewage discharge valve are sequentially arranged on the liquid discharging pipe along the liquid flow direction, and a steam trap is arranged between the third gate valve and the first sewage discharge valve.
[0021] After the third gate valve and the first sewage discharge valve are opened, the liquid flows through the steam trap. When the liquid level in the steam trap exceeds a certain height, the float ball in the steam trap drives the valve stem to move, making the steam trap in an open state. When the liquid level is lower than a certain height, the float ball drives the valve stem to close the steam trap, thus realizing the automatic discharge of the liquid in the liquid accumulation package by the liquid discharging pipe.
[0022] Preferably, a spare pipe is arranged on the liquid discharging pipe. One end of the spare pipe is connected between the third gate valve and the liquid accumulation package, and the other end is connected between the first sewage discharge valve and the liquid storage tank. A fourth gate valve is arranged between the spare pipe and the liquid accumulation package, and a fifth gate valve and a second sewage discharge valve are sequentially arranged on the spare pipe along the liquid flow direction.
[0023] When the liquid discharging pipe fails or the steam trap is being repaired, the fifth gate valve and the second sewage discharge valve on the spare pipe can be opened, and manual liquid discharging can be carried out using the spare pipe.
[0024] Preferably, the end of the sand discharging pipe far away from the first flange is communicated with the liquid discharging pipe.
[0025] It is convenient to discharge the sediment into the liquid storage tank together with the liquid discharging pipe, facilitating the centralized treatment of the sediment and sewage, and also making the transportation of the sediment easier.
[0026] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0027] In this application, the blind plate at the bottom of the liquid accumulation package of the gravity separator is replaced with a flange, and the sand discharging pipe is connected by the flange. The sediment inside the liquid accumulation package is discharged through the sand discharging pipe, avoiding blockage inside the liquid accumulation package. The sand discharging operation is simple and does not require shutting down the gravity separator, avoiding the impact of the sand discharging process on the production of the gas well. Description of the Drawings
[0028] Figure 1 is the usage state diagram of a sand discharging and plugging removing device for a gravity separator of the present utility model;
[0029] Figure 2 is the structural schematic diagram of a gravity separator of the present utility model;
[0030] Markings in the figure:
[0031] 1 - sand discharging pipe, 2 - first flange, 3 - first gate valve, 4 - throttle valve, 5 - second gate valve, 6 - first pressure gauge, 7 - second pressure gauge, 8 - gas charging pipe, 9 - ball valve, 10 - separator body, 11 - liquid accumulation pocket, 12 - second flange, 13 - liquid discharging pipe, 14 - third gate valve, 15 - first blowdown valve, 16 - steam trap, 17 - spare pipe, 18 - fourth gate valve, 19 - fifth gate valve, 20 - second blowdown valve. Specific embodiments
[0032] The present utility model will be further described in detail below in combination with specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present utility model to the following embodiments. All technologies implemented based on the content of the present utility model belong to the scope of the present utility model.
[0033] In the description of the specific embodiments of the present utility model, without special explanation, the expression terms of orientation or position relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the utility model product / device / equipment is usually used and placed. These terms of orientation or position relationship are only for the convenience of describing the solution of the present utility model or simplifying the description in the specific embodiments, facilitating technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation or be constructed and operated in a specific position relationship. Therefore, it should not be construed as a limitation to the present utility model.
[0034] In addition, when terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel. Instead, it can be slightly inclined or deviated. For example, "horizontal" only 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 inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in directions such as "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting. More preferably, the error / deviation is within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present utility model.
[0035] In addition, when expressions such as "first", "second", "third", etc. appear in the terms, they are only used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.
[0036] In addition, in the description of the embodiments of the present utility model, "several", "multiple", "a number of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be more than 9.
[0037] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / limited, when terms such as "set", "installed", "connected", "connected", "provided with", "laid", "arranged" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be connection means commonly used in the art such as welding, riveting, bolting, threaded connection, etc. Such a connection can be a mechanical connection, an electrical connection or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements.
[0038] Embodiment 1
[0039] As Figure 1 shown, a sand discharge and plugging removal device for a gravity separator includes a sand discharge pipe 1. One end of the sand discharge pipe 1 is connected with a first flange 2. The first flange 2 is connected to the bottom of the liquid accumulation package 11 of the gravity separator. A first gate valve 3 and a throttle valve 4 are provided on the sand discharge pipe 1. The first gate valve 3 is arranged between the throttle valve 4 and the first flange 2.
[0040] In use, the sand discharge pipe 1 is connected to the liquid accumulation tank 11 at the bottom of the gravity separator through the first flange 2 at its end. The liquid containing sediment accumulates at the bottom of the liquid accumulation tank 11. Most of the liquid is discharged through the liquid discharge pipe on the side of the liquid accumulation tank 11. When a certain amount of sediment accumulates at the bottom of the liquid accumulation tank 11, the first gate valve 3 on the sand discharge pipe 1 is opened, and the liquid discharge speed is regulated through the throttle valve 4 to discharge the sediment in the liquid accumulation tank 11, avoiding blockage inside the liquid accumulation tank 11. The sand discharge operation is simple and does not require shutting down the gravity separator, ensuring the normal production of the gas well.
[0041] Sand discharge pipe 1: One end of the sand discharge pipe 1 is connected to the liquid accumulation tank 11 at the bottom of the gravity separator through the first flange 2, and the other end is connected to a liquid storage tank for containing sewage.
[0042] First gate valve 3: The first gate valve 3 adopts a flat gate valve.
[0043] Throttle valve 4: The throttle valve 4 adopts a sleeve type throttle valve.
[0044] Furthermore, a second gate valve 5 is provided on the sand discharge pipe 1. The second gate valve 5 adopts a flat gate valve. The second gate valve 5 is arranged between the first gate valve 3 and the throttle valve 4. Both the first gate valve 3 and the second gate valve 5 can cut off the sand discharge pipe 1. When the first gate valve 3 or the second gate valve 5 fails, the other gate valve can still cut off the sand discharge pipe 1 to avoid leakage.
[0045] Embodiment 2
[0046] As Figure 1 shown, in this embodiment, the difference from Embodiment 1 is that a first pressure gauge 6 is provided on the sand discharge pipe 1, and the first pressure gauge 6 is arranged between the first gate valve 3 and the gravity separator.
[0047] In this embodiment, during the normal sand discharge process when the first gate valve 3, the second gate valve 5, and the throttle valve 4 are opened, the first pressure gauge 6 monitors the pressure at the front end of the sand discharge pipe 1 in real time. If the pressure data detected by the first pressure gauge 6 fluctuates significantly, it can be judged that there is a blockage in the pipeline of the sand discharge pipe 1, which is convenient for the operators to take pipe unclogging measures in time to ensure the rapid and effective progress of the sand discharge operation.
[0048] Furthermore, a second pressure gauge 7 is also provided on the sand discharge pipe 1. The second pressure gauge 7 is arranged on the side of the throttle valve 4 away from the first gate valve 3. The second pressure gauge 7 is arranged at the rear end of the sand discharge pipe 1 and monitors the pressures at both ends of the sand discharge pipe 1 simultaneously with the first pressure gauge 6, so that when a blockage occurs, the first pressure gauge 6 or the second pressure gauge 7 can respond in time, shortening the time for the operators to detect the failure and facilitating the rapid restoration of the normal sand discharge operation of the sand discharge pipe 1.
[0049] Further, an air charging pipe 8 is provided on the sand discharge pipe 1, and a ball valve 9 is connected to the air charging pipe 8. When the sand discharge pipe 1 is blocked, nitrogen can be filled into the interior of the sand discharge pipe 1 through the air charging pipe 8, and the nitrogen flushes the sediment inside the sand discharge pipe 1 to achieve the purpose of dredging the sand discharge pipe 1. Further still, the air charging pipe 8 is arranged between the second gate valve 5 and the throttle valve 4, so that the operation of inflating and unblocking can avoid the first gate valve 3 and the second gate valve 4, improving the efficiency of the unblocking operation.
[0050] Embodiment 3
[0051] As Figure 1 and Figure 2 shown, this embodiment provides a gravity separator, including a separator body 10. A liquid accumulation package 11 is provided at the bottom of the separator body 10, and a second flange 12 is connected to the bottom of the liquid accumulation package 11. It also includes a gravity separator sand discharge and blockage removal device as described in Embodiment 1 or Embodiment 2, and the first flange 2 is connected to the second flange 12.
[0052] During use, the sediment separated by the gravity separator accumulates in the liquid accumulation package 11. When a certain amount of sediment accumulates at the bottom of the liquid accumulation package 11, the first gate valve 3 on the sand discharge pipe 1 is opened, and the liquid discharge speed is regulated through the throttle valve 4 to discharge the sediment in the liquid accumulation package 11, avoiding blockage inside the liquid accumulation package 11. The sand discharge operation is simple and does not require shutting down the gravity separator, ensuring the normal production of the gas well.
[0053] Further, a liquid discharge pipe 13 is connected to the side of the liquid accumulation package 11. One end of the sand discharge pipe 1 away from the first flange 2 is communicated with the liquid discharge pipe 13. A third gate valve 14 and a first blowdown valve 15 are sequentially arranged on the liquid discharge pipe 13 along the liquid flow direction. The third gate valve 14 is a flat gate valve, and the first blowdown valve 15 is a valve sleeve type blowdown valve. A steam trap 16 is arranged between the third gate valve 14 and the first blowdown valve 15. After the third gate valve 14 and the first blowdown valve 15 are opened, the liquid flows through the steam trap 16. When the liquid level in the steam trap 16 exceeds a certain height, the float ball in the steam trap 16 drives the valve stem to move, making the steam trap 16 in an open state. When the liquid level is lower than a certain height, the float ball drives the valve stem to close the steam trap 16, thereby realizing the automatic discharge of the liquid in the liquid accumulation package 11 by the liquid discharge pipe 13.
[0054] Further, a spare pipe 17 is provided on the liquid discharge pipe 13. One end of the spare pipe 17 is connected between the third gate valve 14 and the liquid accumulation package 11, and the other end is connected between the first sewage discharge valve 15 and the liquid storage tank. A fourth gate valve 18 is provided between the spare pipe 17 and the liquid accumulation package 11. The fourth gate valve 18 adopts a flat gate valve. A fifth gate valve 19 and a second sewage discharge valve 20 are sequentially arranged on the spare pipe 17 along the liquid flow direction. The fifth gate valve 19 adopts a flat gate valve, and the second sewage discharge valve 20 adopts a valve sleeve type sewage discharge valve. When the liquid discharge pipe 13 fails or the steam trap 16 is overhauled, after the fifth gate valve 19 and the second sewage discharge valve 20 on the spare pipe 17 are opened, manual liquid discharge can be carried out by using the spare pipe 17.
[0055] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A gravity separator sand removal and plugging removal device, characterized in that: The invention comprises a sand discharge pipe (1), the end of which is connected to a first flange (2), the first flange (2) being connected to the bottom of a liquid accumulation bag (11) of a gravity separator, the sand discharge pipe (1) being provided with a first gate valve (3) and a throttle valve (4), the first gate valve (3) being arranged between the throttle valve (4) and the first flange (2).
2. A gravity separator sand removal and plugging removal device according to claim 1, characterized in that: The sand discharge pipe (1) is provided with a second gate valve (5), and the second gate valve (5) is arranged between the first gate valve (3) and the throttle valve (4).
3. A gravity separator sand removal and blockage removal device according to claim 2, characterized in that: The sand discharge pipe (1) is provided with a first pressure gauge (6), and the first pressure gauge (6) is arranged between the first gate valve (3) and the gravity separator.
4. A gravity separator sand removal and plugging removal device according to claim 3, characterized in that: The sand discharge pipe (1) is also provided with a second pressure gauge (7), and the second pressure gauge (7) is arranged on a side of the throttle valve (4) away from the first gate valve (3).
5. The device for removing sand and unblocking a gravity separator according to claim 2, characterized in that: The sand discharge pipe (1) is connected to an air filling pipe (8), and the air filling pipe (8) is connected to a ball valve (9).
6. A gravity separator sand removal and plugging removal device according to claim 5, characterized in that: The inflation pipe (8) is arranged between the second gate valve (5) and the throttle valve (4).
7. A gravity separator, comprising a separator body (10), wherein a liquid accumulation bag (11) is provided at the bottom of the separator body (10), characterized in that: The bottom of the liquid accumulation bag (11) is connected to a second flange (12), and further comprises a gravity separator sand removal and blockage removal device as claimed in any one of claims 1 to 6, wherein the first flange (2) is connected to the second flange (12).
8. A gravity separator according to claim 7, characterized in that: The side of the liquid accumulation bag (11) is connected to a liquid discharge pipe (13), and a third gate valve (14) and a first sewage discharge valve (15) are sequentially arranged on the liquid discharge pipe (13) along the liquid flow direction, and a drain valve (16) is arranged between the third gate valve (14) and the first sewage discharge valve (15).
9. A gravity separator according to claim 8, characterized in that: The liquid discharge pipe (13) is provided with a spare pipe (17), one end of the spare pipe (17) is connected between the third gate valve (14) and the liquid accumulation bag (11), and the other end is connected between the first sewage discharge valve (15) and the liquid storage tank, a fourth gate valve (18) is provided between the spare pipe (17) and the liquid accumulation bag (11), and a fifth gate valve (19) and a second sewage discharge valve (20) are provided in sequence on the spare pipe (17) along the liquid flow direction.
10. A gravity separator according to claim 8, characterized in that: One end of the sand discharge pipe (1) away from the first flange (2) is in communication with the liquid discharge pipe (13).