An oil and gas field storage tank venting system

Abstract

The utility model relates to oil and gas field safety production technical field, concretely relates to a kind of oil and gas field liquid storage tank venting system, including liquid storage tank, diffusion pipe and safety branch pipe, and the top of liquid storage tank is equipped with exhaust pipe mouth, diffusion pipe one end is communicated with exhaust pipe mouth, another end is equipped with discharge port, diffusion pipe is equipped with fire arrester, and safety branch pipe two ends are communicated with diffusion pipe respectively, and safety branch pipe is equipped with blasting mechanism, and fire arrester is located between the two ends of safety branch pipe. By connecting diffusion pipe on liquid storage tank, the orderly discharge of gas separated out in liquid storage tank is realized, the pollution to the environment around liquid storage tank can be reduced, the harm to staff is reduced, simultaneously, the parallel arrangement of fire arrester and blasting mechanism is realized by safety branch pipe, when the pressure of liquid storage tank is overpressure, it is released by bursting disc, the pressure balance of liquid storage tank can be further maintained, the overpressure of pipeline, the risk of pressure-retention explosion is reduced, simple structure, it can be easily improved and installed on existing oil and gas field liquid storage tank.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas field safety production technology, specifically to an oil and gas field liquid storage tank venting system. Background Technology

[0002] The mixed liquids produced during oil and gas field production are generally temporarily stored in storage tanks at well sites and need to be transported periodically. These mixed liquids continuously release VOC gases, affecting the pressure inside the storage tanks. Therefore, existing storage tanks are equipped with breather valves with flame arresters on top to release pressure when the pressure inside the tank exceeds a certain value, maintaining pressure balance. However, during production, it has been found that because oil and gas field production is a continuous process, mixed liquids continuously enter the storage tanks. The breather valves release flammable, explosive, and volatile organic compounds (VOCs) for extended periods, causing lipid-like substances to accumulate in the flame arresters, leading to blockages. Regular cleaning and maintenance are necessary to prevent the risk of pressure buildup and explosion. However, manual regular cleaning and maintenance cannot completely eliminate the risk of pressure buildup in the storage tanks, and manual cleaning is time-consuming and labor-intensive, increasing oil and gas field production costs. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the use of breather valves with flame arresters to maintain pressure balance in oil and gas field mixed liquid storage tanks, which are prone to clogging, time-consuming and labor-intensive to clean, increasing production risks and costs, and easily causing environmental pollution. This invention provides an oil and gas field storage tank venting system.

[0004] This utility model provides an oil and gas field liquid storage tank venting system, including: A liquid storage tank, wherein the top of the liquid storage tank is provided with an exhaust pipe port; A vent pipe, one end of which is connected to the exhaust pipe port and the other end of which is provided with a discharge port, and a flame arrester is provided on the vent pipe; A safety branch pipe, the two ends of which are respectively connected to the vent pipe, is equipped with a blasting mechanism on the safety branch pipe, and the flame arrester is located between the two ends of the safety branch pipe.

[0005] Preferably, a pressure detection mechanism is provided on the inlet side of the flame arrester or the inlet side of the blasting mechanism.

[0006] Preferably, the blasting mechanism includes a first connector and a second connector, the first connector and the second connector are detachably connected, and a blasting disc is embedded between the first connector and the second connector.

[0007] Preferably, the vent pipe includes a vertical pipe section, a horizontal pipe section, and an exhaust pipe section connected in sequence. The top of the vertical pipe section is detachably connected to the exhaust port. The flame arrester is installed in the horizontal pipe section. The exhaust pipe section is vertically arranged, and the exhaust port is located at the top of the exhaust pipe section.

[0008] Preferably, the safety branch pipe is arranged parallel to and coplanar with the horizontal pipe section, and the bottom of the safety branch pipe and the horizontal pipe section are provided with supports.

[0009] Preferably, the inlet side of the flame arrester is connected to a first cleaning branch pipe, and the first cleaning branch pipe is equipped with a first manual valve.

[0010] Preferably, an adapter is provided between the vertical pipe section and the horizontal pipe section, the adapter is connected to a second cleaning branch pipe, and the second cleaning branch pipe is connected to a second manual valve.

[0011] Preferably, it includes at least two storage tanks, each of which is connected to the vent pipe and the safety branch pipe, all of which are connected to a manifold section, and the manifold section is connected to the discharge pipe section.

[0012] Preferably, the manifold section is connected to an inclined pipe section, the inclined pipe section is connected to the discharge pipe section, a third cleaning branch pipe is provided between the manifold section and the inclined pipe section, and the third cleaning branch pipe is provided with a third manual valve.

[0013] Preferably, the vent pipe is connected to an exhaust gas collection branch pipe, one end of which is provided with a quick connector and the other end is coaxially connected to the horizontal pipe section. The exhaust gas collection branch pipe is provided with a control valve, and the quick connector can be connected to the tanker truck through a pipeline.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides an oil and gas field storage tank venting system. By connecting a vent pipe to the storage tank, the system enables the orderly discharge of gases released from the storage tank, thereby reducing pollution to the surrounding environment and minimizing harm to workers. 2. This utility model provides an oil and gas field storage tank venting system, which realizes the parallel setting of flame arrester and explosion mechanism through safety branch pipe. When the pressure of the storage tank is over-pressurized, it is released by the explosion disc, which can safely maintain the pressure balance of the storage tank, reduce the risk of pipeline over-pressure, pressure buildup and explosion. The structure is simple and can be easily improved and installed on existing oil and gas field storage tanks. Attached Figure Description

[0015] Figure 1 This is a top view of the combined state of the vent pipe and the safety branch pipe described in Example 1.

[0016] Figure 2 This is a front view of the combined state of the vent pipe and the safety branch pipe described in Example 1.

[0017] Figure 3This is a top view of the combined state of the vent pipe, the safety branch pipe, and the waste gas collection branch pipe described in Example 1.

[0018] Figure 4 This is a front view of the combined state of the vent pipe, the safety branch pipe, and the waste gas collection branch pipe described in Example 1.

[0019] Figure 5 This is a schematic diagram of the structure of an oil and gas field storage tank venting system, as shown in Example 1.

[0020] Figure 6 This is the usage state of an oil and gas field liquid storage tank venting system according to Example 1. Figure 1 .

[0021] Figure 7 This is the usage state of an oil and gas field liquid storage tank venting system according to Example 1. Figure 2 .

[0022] Marked in the image: 1-Storage tank, 11-Exhaust pipe, 2-Vent pipe, 21-Vertical pipe section, 22-Horizontal pipe section, 23-Discharge pipe section, 24-Discharge port, 25-Manifold section, 26-Inclined pipe section, 3-Flame arrester, 4-Safety branch pipe, 5-Explosion mechanism, 51-First connector, 52-Second connector, 53-Rupture disc, 6-Pressure detection mechanism, 7-Support, 8-First cleaning branch pipe, 81-First manual valve, 9-Adapter, 10-Second cleaning branch pipe, 101-Second manual valve, 20-Third cleaning branch pipe, 201-Third manual valve, 30-Waste gas collection branch pipe, 301-Quick connector, 302-Control valve, 40-Tank truck. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0024] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer" used in the description of specific embodiments of this utility model to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0026] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0027] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0028] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0029] Example 1 like Figures 1-5 As shown, an oil and gas field storage tank venting system includes a storage tank 1, a vent pipe 2, and a safety branch pipe 4. The top of the storage tank 1 is provided with an exhaust port 11. One end of the vent pipe 2 is connected to the exhaust port 11, and the other end is provided with a discharge port 24. A flame arrester 3 is provided on the vent pipe 2. Both ends of the safety branch pipe 4 are connected to the vent pipe 2, and a blasting mechanism 5 is provided on the safety branch pipe 4. The flame arrester 3 is located between the two ends of the safety branch pipe 4.

[0030] The storage tank 1 is a tank structure used to store the mixed liquid generated in oil and gas field production; the vent pipe 2 is a pipeline structure used to connect with the exhaust port 11 of the original breather valve installed on the storage tank 1 to realize the discharge of overpressure gas in the storage tank 1, so as to balance the internal and external pressure of the storage tank 1; the vent pipe 2 is equipped with a flame arrester 3, which is used to achieve the same flame arresting effect as the original breather valve flame arrester 3; the safety branch pipe 4 is used to connect in parallel on the vent pipe 2 to realize the parallel setting of the flame arrester 3 and the blasting mechanism 5.

[0031] This embodiment of an oil and gas field storage tank venting system releases pressure through the vent pipe 2 where the flame arrester 3 is located, reducing the risk of pipeline pressure buildup and explosion, and enabling the orderly discharge of gas released from the mixed liquid, thereby reducing the risk of fire and explosion around the storage tank 1. When the flame arrester 3 becomes blocked, the pressure inside the storage tank 1 can be released through the rupture mechanism 5, effectively avoiding the risk of pipeline pressure buildup and explosion.

[0032] In optional implementations, such as Figure 2 As shown, a pressure detection mechanism 6 is provided on the inlet side of the flame arrester 3 or the inlet side of the blasting mechanism 5. The pressure detection mechanism 6 allows the pressure inside the vent pipe 2 to be observed, enabling personnel to promptly detect any blockages in the flame arrester 3 and carry out timely cleaning and maintenance.

[0033] In an optional implementation, the pressure detection mechanism 6 may be a pressure gauge.

[0034] In an optional embodiment, the pressure detection mechanism 6 can be set between the connection point of the safety branch pipe 4 and the vent pipe 2 and the inlet side of the flame arrester 3, or it can be set between the connection point of the safety branch pipe 4 and the vent pipe 2 and the inlet side of the blasting mechanism 5, so as to realize the intuitive and accurate display of the pressure in the pipeline in front of the flame arrester 3.

[0035] In optional implementations, such as Figure 1 As shown, the blasting mechanism 5 may include a first connector 51 and a second connector 52, which are detachably connected, and a blasting disc 53 is embedded between the first connector 51 and the second connector 52.

[0036] In an optional embodiment, the first connector 51 and the second connector 52 may each be provided with a flange. The rupture disc 53 is embedded between the flanges of the first connector 51 and the second connector 52. The two flanges are bolted together after being connected, so as to realize the overpressure relief function of the venting system after the flame arrester 3 is blocked. The structure is simple and maintenance and replacement are convenient.

[0037] In optional implementations, such as Figure 2 As shown, the vent pipe 2 may include a vertical pipe section 21, a horizontal pipe section 22, and an exhaust pipe section 23 connected in sequence. The top of the vertical pipe section 21 is detachably connected to the exhaust port 11. A flame arrester 3 is installed in the horizontal pipe section 22. The exhaust pipe section 23 is vertically arranged, and the exhaust port 24 is located at the top of the exhaust pipe section 23. The vertical pipe section 21 receives the gas discharged from the top of the storage tank 1, allowing the gas to enter the vertical pipe section 21 after being output from the top of the storage tank 1, and then enter the vertically arranged exhaust pipe section 23, which is located near the oil and gas field production site, through the horizontal pipe section 22. The gas is then discharged from the exhaust port 24 at the top of the exhaust pipe section 23, ensuring smooth gas delivery. Through multiple turns, impurities in the gas adhere to the pipeline, reducing the pollution of the discharged gas to the environment and ensuring smooth gas delivery. This venting system simplifies the structure and can be easily modified and installed on the basis of the existing storage tank 1.

[0038] In an optional embodiment, the safety branch pipe 4 is arranged parallel to and coplanar with the horizontal pipe section 22, and the bottom of the safety branch pipe 4 and the horizontal pipe section 22 are provided with supports 7. The supports 7 provide stable support for the flame arrester 3 and the blasting mechanism 5, ensuring the stable use of the flame arrester 3 and the blasting mechanism 5.

[0039] In an optional embodiment, the support 7 can be a concrete block component, and the plane of the top surface of the support 7 provides a support surface for the flame arrester 3 and the blasting mechanism 5. The vent pipe 2 and the safety branch pipe 4 can be connected to the top surface of the support 7 through fasteners to improve the stability of the pipeline structure and avoid the impact of pipeline vibration on the blasting mechanism 5.

[0040] In optional implementations, such as Figure 2As shown, the inlet side of the flame arrester 3 is connected to a first cleaning branch pipe 8, which is equipped with a first manual valve 81. By opening the first manual valve 81, the vent pipe 2 can be connected to the external environment through the first cleaning branch pipe 8, facilitating the discharge of contaminants from the pipeline in front of the flame arrester 3 within the vent pipe 2. This reduces the risk of contaminants clogging the flame arrester 3, extends its service life, and reduces the frequency of maintenance and repair. Furthermore, it allows for emergency pressure release in the event of simultaneous malfunctions of the flame arrester 3 and the blasting mechanism 5, improving the safety of the venting system and preventing the risk of pressure buildup and explosion.

[0041] In an optional embodiment, the first cleaning branch pipe 8 can be vertically connected to the bottom of the vent pipe 2, so that after the first manual valve 81 is opened, the dirt in the pipeline can be automatically discharged under the action of gravity, which facilitates pipeline cleaning. When there is pressure in the vent pipe 2, it can also release pressure to the ground to avoid causing harm to the staff.

[0042] In one or more implementations, such as Figure 6 As shown, the system includes at least two storage tanks 1, each connected to a vent pipe 2 and a safety branch pipe 4. All vent pipes 2 are connected to a manifold section 25, which is connected to an outlet pipe section 23. This allows the venting systems of multiple storage tanks 1 to be integrated into a network, with discharge occurring through a single outlet pipe section 23. This reduces the number of outlet pipes required, improves the compactness of the oil and gas field production site structure, and lowers the cost of modification.

[0043] In optional implementations, such as Figure 2 As shown, the manifold section 25 is connected to the inclined section 26, which is connected to the discharge section 23. A third cleaning branch pipe 20 is provided between the manifold section 25 and the inclined section 26, and the third cleaning branch pipe 20 is equipped with a third manual valve 201. The inclined section 26 is used to connect the horizontal section 22 and the discharge section 23 of the vent pipe 2. The inclined pipe gives the horizontal section 22 to the discharge section 23 a certain gas climbing characteristic, which is conducive to the retention of impurities in the gas in the vent pipe 2, reducing pollutants in the discharged gas. By periodically removing impurities from the third cleaning branch pipe 20, it is beneficial to ensure the smooth long-term transportation of gas in the entire vent pipe 2 pipeline.

[0044] In one or more implementations, such as Figures 1-2 As shown, an adapter 9 can be installed between the vertical pipe section 21 and the horizontal pipe section 22. The adapter 9 is connected to a second cleaning branch pipe 10, which is connected to a second manual valve 101. The adapter 9 is used to achieve a 90-degree turn connection between the vertical pipe section 21 and the horizontal pipe section 22.

[0045] In an optional embodiment, the adapter 9 can be welded to the vertical pipe section 21 and the horizontal pipe section 22. A second cleaning branch pipe 10 can be provided on the adapter 9 and blocked by the second manual valve 101 to facilitate separate cleaning of the vertical pipe section 21 and the horizontal pipe section 22 by opening the second manual valve 101.

[0046] In an optional embodiment, the adapter 9 can also be connected to the vertical pipe section 21 and the horizontal pipe section 22 by flanges. The flange connection is beneficial for the installation, maintenance and repair of the adapter 9, and enables separate cleaning of the horizontal pipe section 22 and the vertical pipe section 21.

[0047] In one or more implementations, such as Figures 3-5 As shown, the vent pipe 2 is also connected to a waste gas collection branch pipe 30. One end of the waste gas collection branch pipe 30 is equipped with a quick connector 301, and the other end is coaxially connected to the horizontal pipe section 22. The waste gas collection branch pipe 30 is equipped with a regulating valve 302, and the quick connector 301 can be connected to the tank truck 40 through a pipeline. The waste gas collection branch pipe 30 is used to connect to the vent pipe 2, and one end of its quick connector 301 is connected to the tank truck 40 to realize the recovery and treatment of the gas precipitated in the mixed liquid in the tank truck 40, and to realize the safe loading, unloading and transportation of the mixed liquid in the oil and gas field storage tank 1. By coaxially connecting the waste gas collection branch pipe 30 to the horizontal pipe section 22, the gas input from the waste gas collection branch pipe 30 can directly enter the horizontal conveying pipe section for discharge, reducing the disturbance to the airflow in the vent pipe 2 and ensuring the smooth output and discharge of gas.

[0048] In an optional embodiment, the exhaust gas collection branch pipe 30 can be connected to the connector 9 to facilitate the connection of the pipeline through the internal channel of the connector 9.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An oil and gas field liquid storage tank venting system, characterized in that, include: A liquid storage tank (1) is provided with an exhaust port (11) on the top of the liquid storage tank (1); Vent pipe (2), one end of the vent pipe (2) is connected to the exhaust pipe port (11) and the other end is provided with a discharge port (24), and a flame arrester (3) is provided on the vent pipe (2); Safety branch pipe (4), the two ends of which are connected to the vent pipe (2), the safety branch pipe (4) is equipped with a blasting mechanism (5), and the flame arrester (3) is located between the two ends of the safety branch pipe (4).

2. The oil and gas field storage tank venting system according to claim 1, characterized in that, A pressure detection mechanism (6) is provided on the inlet side of the flame arrester (3) or the inlet side of the blasting mechanism (5).

3. The oil and gas field liquid storage tank venting system according to claim 1, characterized in that, The blasting mechanism (5) includes a first connector (51) and a second connector (52), which are detachably connected, and a blasting disc (53) is embedded between the first connector (51) and the second connector (52).

4. An oil and gas field liquid storage tank venting system according to any one of claims 1-3, characterized in that, The vent pipe (2) includes a vertical pipe section (21), a horizontal pipe section (22) and an exhaust pipe section (23) connected in sequence. The top of the vertical pipe section (21) is detachably connected to the exhaust port (11). The flame arrester (3) is installed in the horizontal pipe section (22). The exhaust pipe section (23) is vertically installed. The exhaust port (24) is installed at the top of the exhaust pipe section (23).

5. The oil and gas field liquid storage tank venting system according to claim 4, characterized in that, The safety branch pipe (4) is parallel to and coplanar with the horizontal pipe section (22), and the bottom of the safety branch pipe (4) and the horizontal pipe section (22) are provided with supports (7).

6. The oil and gas field liquid storage tank venting system according to claim 5, characterized in that, The inlet side of the flame arrester (3) is connected to a first cleaning branch pipe (8), and the first cleaning branch pipe (8) is equipped with a first manual valve (81).

7. The oil and gas field storage tank venting system according to claim 6, characterized in that, An adapter (9) is provided between the vertical pipe section (21) and the horizontal pipe section (22). The adapter (9) is connected to a second cleaning branch pipe (10), which is connected to a second manual valve (101).

8. The oil and gas field storage tank venting system according to claim 4, characterized in that, It includes at least two storage tanks (1), each of the storage tanks (1) is connected to the vent pipe (2) and the safety branch pipe (4), all the vent pipes (2) are connected to the manifold section (25), and the manifold section (25) is connected to the discharge section (23).

9. The oil and gas field storage tank venting system according to claim 8, characterized in that, The manifold section (25) is connected to an inclined section (26), which is connected to the discharge section (23). A third cleaning branch pipe (20) is provided between the manifold section (25) and the inclined section (26), and the third cleaning branch pipe (20) is provided with a third manual valve (201).

10. The oil and gas field storage tank venting system according to claim 4, characterized in that, The vent pipe (2) is connected to a waste gas collection branch pipe (30). One end of the waste gas collection branch pipe (30) is provided with a quick connector (301), and the other end is coaxially connected to the horizontal pipe section (22). The waste gas collection branch pipe (30) is provided with a control valve (302). The quick connector (301) can be connected to the tank truck (40) through a pipeline.

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