An oil and gas field mixed liquid loading and unloading system

Abstract

The utility model relates to oil and gas field mixed liquid haulage technical field, concretely relates to an oil and gas field mixed liquid loading and unloading system, including liquid storage tank and tank car, and the liquid storage tank is connected with the release pipe and the diffusion pipe, and the release pipe communicates the bottom of liquid storage tank, and the diffusion pipe communicates the top of liquid storage tank, and the diffusion pipe is connected with waste gas collection branch pipe and waste gas discharge branch pipe, and the tank car is equipped with loading and unloading liquid mouth and oil gas recovery joint, and the release pipe is detachably connected with loading and unloading liquid mouth, and waste gas collection branch pipe is detachably connected with oil gas recovery joint, and waste gas discharge branch pipe is equipped with the discharge port, and the centralized treatment after the recovery of the volatile gas of mixed liquid in liquid storage tank is carried out through diffusion pipe, and the centralized treatment after the recovery of the tank car exhaust gas in loading process is realized through waste gas collection branch pipe and tank car intercommunication, and the safe and orderly recovery treatment of liquid storage tank to itself and tank car side exhaust gas is realized, realizes the closed loading and unloading, realizes the internal circulation of volatile gas in mixed liquid storage and loading process, and is more environmental protection, healthy and safe.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas field mixed liquid transportation technology, specifically to an oil and gas field mixed liquid loading and unloading system. Background Technology

[0002] Currently, the mixed liquids produced during oil and gas field production are generally temporarily stored in storage tanks and need to be transported regularly by tank trucks. The tank trucks are equipped with loading and unloading ports at the rear. During the loading process, the loading and unloading ports are connected to the storage tanks through pipes that connect to the bottom of the storage tanks, allowing the mixed liquids in the storage tanks to flow into the tank trucks. In order to ensure that the mixed liquids can enter the tank trucks smoothly, the top cover of the tank trucks needs to be kept open during the loading process. However, the flammable, explosive, and volatile organic compounds in the mixed liquids will be directly and disorderly discharged into the surrounding environment from the top cover, causing environmental pollution, harming workers, and posing a risk of fire and explosion.

[0003] Existing tank trucks typically have loading / unloading ports and vapor recovery connectors side-by-side on the lower side of the vehicle body. The loading / unloading ports are used for loading and unloading the mixed liquid, while the vapor recovery connectors are used for venting vapors from the tank truck. If the vapor recovery connectors are opened while the top cover remains closed during the loading process, the gas released from the mixed liquid in the tank truck will be released through the vapor recovery connectors. However, the vapor recovery connectors and loading / unloading ports are located close to each other and are relatively low. Furthermore, existing oil and gas field storage tanks do not have vapor recovery pipelines, resulting in the gas released from the vapor recovery connectors being directly discharged into the work area of ​​the workers, causing significant harm to them. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the lack of oil and gas recovery pipelines in oil and gas field mixed liquid storage tanks, the direct emission of flammable, explosive, and volatile organic compounds released from the mixed liquid during the tanker loading process, which poses safety hazards and causes environmental pollution. This invention provides an oil and gas field mixed liquid loading and unloading system.

[0005] This utility model provides an oil and gas field mixed fluid loading and unloading system, including: A liquid storage tank is connected to a drain pipe and a vent pipe. The drain pipe is connected to the bottom of the liquid storage tank, and the vent pipe is connected to the top of the liquid storage tank. The vent pipe is connected to a waste gas collection branch pipe and a waste gas discharge branch pipe. The tanker truck is equipped with a loading / unloading port and an oil / gas recovery connector. The vent pipe is detachably connected to the loading / unloading port, the exhaust gas collection branch pipe is detachably connected to the oil / gas recovery connector, and the exhaust gas discharge branch pipe is equipped with an exhaust port.

[0006] Preferably, the liquid storage tank is equipped with a ladder, the vent pipe includes a vertical pipe section parallel to the ladder, the vertical pipe section is equipped with a flame arrester, the exhaust gas collection branch pipe is perpendicularly connected to the vertical pipe section, the connection point between the exhaust gas collection branch pipe and the vertical pipe section is located above the flame arrester, and the connection point between the exhaust gas discharge branch pipe and the vertical pipe section is located below the flame arrester.

[0007] Preferably, the bottom of the vertical pipe section is connected to a first horizontal pipe section, the exhaust gas collection branch pipe includes a connecting pipe parallel to the vertical pipe section, and the end of the connecting pipe away from the vertical pipe section is connected to a second horizontal pipe section, the first horizontal pipe section and the second horizontal pipe section are coaxially arranged.

[0008] Preferably, a cleaning and discharge branch pipe is provided between the connecting pipe and the second horizontal pipe section, and the cleaning and discharge branch pipe is equipped with a manual valve.

[0009] Preferably, the exhaust gas discharge branch pipe is vertically arranged, the exhaust gas discharge branch pipe is connected to the first horizontal pipe section, and the discharge port is located at the top of the exhaust gas discharge branch pipe.

[0010] Preferably, the vent pipe further includes a waste gas treatment branch pipe, which is connected to the first horizontal pipe section and connected to the sewage tank.

[0011] Preferably, the exhaust gas collection branch pipe includes an end pipe, which is horizontally arranged and has a height of not less than 1m.

[0012] Preferably, the end pipe is equipped with a regulating valve.

[0013] Preferably, the end of the end tube away from the liquid storage tank is detachably connected to a quick connector.

[0014] Preferably, the end of the terminal pipe away from the liquid storage tank is connected to a transition pipe via the quick connector, and the transition pipe is adapted to the oil and gas recovery connector. The transition pipe includes a PVC steel wire hose.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The present invention provides an oil and gas field mixed liquid loading and unloading system, which adds a vent pipe to the storage tank, and centrally treats the volatile gases released from the mixed liquid in the storage tank after recovery by the vent pipe, so as to avoid environmental pollution and harm to workers caused by the volatile gases released from the mixed liquid in the storage tank. 2. The oil and gas field mixed liquid loading and unloading system provided by this utility model, by connecting and installing a waste gas collection branch pipe on the vent pipe, and connecting the waste gas collection branch pipe to the tank truck, realizes the centralized treatment of the gas emitted by the tank truck during the loading process, so that the storage tank can safely and orderly recover and treat the waste gas emitted by itself and the side of the tank truck, realizes closed loading and unloading, realizes the internal circulation of volatile gases during mixed liquid storage and loading process, and is more environmentally friendly, healthy and safe. Attached Figure Description

[0016] Figure 1 This is a front view of an oil and gas field mixed liquid loading and unloading system according to Example 1.

[0017] Figure 2 This is a top view of an oil and gas field mixed liquid loading and unloading system according to Example 1.

[0018] Figure 3 This is a front view of the combination of the exhaust gas collection branch pipe and the exhaust gas discharge branch pipe described in Example 1.

[0019] Figure 4 This is a top view of the combination of the exhaust gas collection branch pipe and the exhaust gas discharge branch pipe described in Example 1.

[0020] Figure 5 This is a schematic diagram of the usage status of an oil and gas field mixed liquid loading and unloading system as described in Example 1.

[0021] Figure 6 This is a schematic diagram of the structure of an oil and gas field mixed liquid loading and unloading system as described in Example 1.

[0022] Figure 7 This is a schematic diagram of the structure of the combination of the waste gas collection branch pipe, the waste gas emission branch pipe and the waste gas treatment branch pipe in Example 1.

[0023] Marked in the image: 1-Storage tank, 11-Drain pipe, 12-Ladder, 2-Vent pipe, 21-Vertical pipe section, 22-First horizontal pipe section, 3-Waste gas collection branch pipe, 31-Connecting pipe, 32-Second horizontal pipe section, 33-Clean-up discharge branch pipe, 34-Manual valve, 4-Waste gas discharge branch pipe, 41-Discharge port, 5-Tank truck, 51-Loading / unloading port, 52-Oil and gas recovery connector, 6-Flame arrester, 7-Terminal pipe, 71-Control valve, 72-Quick connector, 8-Transition pipe, 9-Waste gas treatment branch pipe, 10-Sewage tank, 20-Dike. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Example 1 like Figures 1-7 As shown, an oil and gas field mixed liquid loading and unloading system includes a storage tank 1 and a tank truck 5. The storage tank 1 is connected to a drain pipe 11 and a vent pipe 2. The drain pipe 11 is connected to the bottom of the storage tank 1, and the vent pipe 2 is connected to the top of the storage tank 1. The vent pipe 2 is connected to an exhaust gas collection branch pipe 3 and an exhaust gas discharge branch pipe 4. The tank truck 5 is equipped with a loading and unloading port 51 and an oil and gas recovery connector 52. The drain pipe 11 is detachably connected to the loading and unloading port 51, the exhaust gas collection branch pipe 3 is detachably connected to the oil and gas recovery connector 52, and the exhaust gas discharge branch pipe 4 is equipped with a discharge port 41.

[0031] Storage tank 1 is a mixed liquid storage device in existing oil and gas stations. Tank truck 5 is used to periodically transport the mixed liquid stored in storage tank 1. The existing storage tank 1 is equipped with a breather valve on the top, which regulates the pressure when the pressure in storage tank 1 exceeds a certain value. This embodiment differs from the storage tank 1 of the prior art by using a vent pipe 2 connected to storage tank 1 to realize the collection, emission and centralized treatment of volatile gases in storage tank 1. On the basis of vent pipe 2, exhaust gas collection branch pipe 3 and exhaust gas emission branch pipe 4 are further added to realize the centralized collection and treatment of volatile gases released from storage tank 1 and tank truck 5.

[0032] In optional implementations, such as Figure 1 , Figure 2As shown, an operating platform is provided on the top of the liquid storage tank 1, and a ladder 12 is provided on the side wall. The vent pipe 2 may include a vertical pipe section 21 parallel to the ladder 12. A flame arrester 6 is provided on the vertical pipe section 21. The exhaust gas collection branch pipe 3 is perpendicular to the vertical pipe section 21. The connection position between the exhaust gas collection branch pipe 3 and the vertical pipe section 21 is located above the flame arrester 6. The connection position between the exhaust gas discharge branch pipe 4 and the vertical pipe section 21 is located below the flame arrester 6. By setting a vertical pipe section 21 parallel to the ladder 12, the flame arrester 6 is installed on the vertical pipe section 21, which facilitates maintenance and repair of the flame arrester 6 and the vertical pipe section 21 at the ladder 12 position. In use, the volatile gas released from the liquid storage tank 1 enters the vertical pipe section 21 along the vent pipe 2, passes through the flame arrester 6, and then enters the exhaust gas discharge branch pipe 4 for centralized discharge. The volatile gas released from the tank truck 5 enters the exhaust gas discharge branch pipe 4 for centralized discharge treatment along the exhaust gas collection branch pipe 3, passes through the flame arrester 6, and then enters the exhaust gas discharge branch pipe 4 for centralized discharge treatment, so as to achieve safe treatment of the volatile gas released from the liquid storage tank 1 and the tank truck 5.

[0033] In optional implementations, such as Figure 1 , Figure 2 As shown, the bottom of the vertical pipe section 21 is connected to the first horizontal pipe section 22. The exhaust gas collection branch pipe 3 includes a connecting pipe 31 parallel to the vertical pipe section 21. The end of the connecting pipe 31 away from the vertical pipe section 21 is connected to the second horizontal pipe section 32. The first horizontal pipe section 22 and the second horizontal pipe section 32 are coaxially arranged. The arrangement of the connecting pipe 31, the first horizontal pipe section 22, and the second horizontal pipe section 32 results in a smaller footprint, facilitating retrofitting of the existing liquid storage tank 1. This allows the gas in the second horizontal pipe section 32 to smoothly enter the vertical pipe section 21 and then exit from the first horizontal pipe section 22, reducing pollution to the surrounding environment of the liquid storage tank 1 during the loading process.

[0034] In optional implementations, such as Figure 6 As shown, the exhaust gas discharge branch pipe 4 can be installed vertically. The exhaust gas discharge branch pipe 4 is connected to the first horizontal pipe section 22, and the discharge port 41 is located at the top of the exhaust gas discharge branch pipe 4. By installing the exhaust gas discharge branch pipe 4 vertically, the volatile gases released from the liquid storage tank 1 and the tank truck 5 are guided to the high altitude for discharge, reducing pollution to the environment around the liquid storage tank 1.

[0035] In optional implementations, such as Figure 7 As shown, the vent pipe 2 may also include a waste gas treatment branch pipe 9, which is connected to the first horizontal pipe section 22 and to the sewage tank 10. By adding the waste gas treatment branch pipe 9 to the vent pipe 2, and having it work in conjunction with the waste gas emission branch pipe 4, the volatile gases released from the storage tank 1 and tank truck 5 can be discharged at high altitude according to actual conditions, or discharged into the sewage tank 10 for centralized treatment, minimizing environmental pollution.

[0036] In one or more implementations, such as Figure 3 , Figure 4 As shown, a cleaning and discharge branch pipe 33 can also be installed between the connecting pipe 31 and the second horizontal pipe section 32. The cleaning and discharge branch pipe 33 is equipped with a manual valve 34. By opening the manual valve 34, impurities in the exhaust gas collection branch pipe 3 can be cleaned and discharged, facilitating the maintenance of the exhaust gas collection branch pipe 3 and ensuring its safe use for a long time.

[0037] In an optional embodiment, the cleaning and discharge branch pipe 33 can be installed on the 90-degree elbow between the connecting pipe 31 and the second horizontal pipe section 32. The two ends of the elbow can be connected by flanges to facilitate the removal of the elbow for overall cleaning of the exhaust gas collection branch pipe 3.

[0038] In an optional embodiment, a filter mechanism can be embedded inside the elbow pipe to filter the gas, prevent pipe blockage after long-term use, and facilitate cleaning.

[0039] In one or more implementations, such as Figure 1 As shown, the exhaust gas collection branch pipe 3 includes an end pipe 7, which is horizontally arranged and has a height of not less than 1m. The end pipe 7 is used to raise the inlet height of the exhaust gas collection branch pipe 3 so that the exhaust gas collection branch pipe 3 can be easily connected to the oil and gas recovery connector 52 on the tank truck 5.

[0040] In an optional embodiment, the terminal pipe 7 is equipped with a regulating valve 71. The regulating valve 71 can control the conduction state of the terminal pipe 7, ensuring that the connection between the exhaust gas collection branch pipe 3 and the tank truck 5 is stable before conduction, thus ensuring pipeline safety during the loading and unloading of the mixed liquid and achieving environmental protection in the loading and unloading process of the mixed liquid.

[0041] In an optional embodiment, the end of the terminal pipe 7 furthest from the storage tank 1 is detachably connected to a quick connector 72. By equipping the terminal pipe 7 with a quick connector 72, it is possible to facilitate the quick assembly and connection between the tank truck 5 and the exhaust gas collection branch pipe 3.

[0042] In optional implementations, such as Figure 5 As shown, the end of the terminal pipe 7 furthest from the storage tank 1 is connected to the transition pipe 8 via a quick connector 72. The transition pipe 8 is adapted to the oil and gas recovery connector 52 and includes a PVC steel wire hose. The transition pipe 8 is used to connect the tank truck 5 and the exhaust gas collection branch pipe 3. The PVC steel wire hose transition pipe 8 is adaptable to the transportation of volatile gases from the mixed liquid in the oil and gas field and has a flexible feature, which can compensate for the positional difference between the fixed terminal pipe 7 and the tank truck 5 at different parking positions, so as to achieve smooth conduction and safe recovery and treatment of volatile gases released in the tank truck 5.

[0043] This embodiment describes an oil and gas field mixed fluid loading and unloading system, such as... Figures 1-7As shown, the storage tank 1 is located within the dike 20. Several supports are installed within the dike 20 to support the exhaust gas collection branch pipe 3 and the exhaust gas discharge branch pipe 4. During the loading process of the tank truck 5, the end pipe 7 is connected to the oil and gas recovery connector 52 of the tank truck 5 via a transition pipe 8. The exhaust gas discharge branch pipe 4 is connected to the discharge port 41 or the sewage tank 10, achieving centralized collection and discharge of volatile gases released from the tank truck 5 and the storage tank 1. After loading is completed, the transition pipe 8 is separated from the oil and gas recovery connector 52 of the tank truck 5. This mixed liquid loading and unloading system, through structural modification of the storage tank 1, enables the oil and gas field's storage tank 1 to simultaneously possess exhaust gas venting and collection functions, effectively mitigating pollution to the surrounding environment during the loading and unloading process.

[0044] 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. A mixed fluid loading and unloading system for oil and gas fields, characterized in that, include: A liquid storage tank (1) is connected to a drain pipe (11) and a vent pipe (2). The drain pipe (11) is connected to the bottom of the liquid storage tank (1), and the vent pipe (2) is connected to the top of the liquid storage tank (1). The vent pipe (2) is connected to a waste gas collection branch pipe (3) and a waste gas discharge branch pipe (4). Tank truck (5), the tank truck (5) is provided with a loading and unloading port (51) and an oil and gas recovery connector (52), the vent pipe (11) is detachably connected to the loading and unloading port (51), the exhaust gas collection branch pipe (3) is detachably connected to the oil and gas recovery connector (52), and the exhaust gas discharge branch pipe (4) is provided with a discharge port (41).

2. The oil and gas field mixed fluid loading and unloading system according to claim 1, characterized in that, The storage tank (1) is equipped with a ladder (12), and the vent pipe (2) includes a vertical pipe section (21) parallel to the ladder (12). The vertical pipe section (21) is equipped with a flame arrester (6). The exhaust gas collection branch pipe (3) is perpendicular to the vertical pipe section (21). The connection position between the exhaust gas collection branch pipe (3) and the vertical pipe section (21) is located above the flame arrester (6). The connection position between the exhaust gas discharge branch pipe (4) and the vertical pipe section (21) is located below the flame arrester (6).

3. The oil and gas field mixed fluid loading and unloading system according to claim 2, characterized in that, The bottom of the vertical pipe section (21) is connected to the first horizontal pipe section (22). The exhaust gas collection branch pipe (3) includes a connecting pipe (31) parallel to the vertical pipe section (21). The end of the connecting pipe (31) away from the vertical pipe section (21) is connected to the second horizontal pipe section (32). The first horizontal pipe section (22) and the second horizontal pipe section (32) are coaxially arranged.

4. The oil and gas field mixed fluid loading and unloading system according to claim 3, characterized in that, A cleaning and discharge branch pipe (33) is provided between the connecting pipe (31) and the second horizontal pipe section (32), and the cleaning and discharge branch pipe (33) is equipped with a manual valve (34).

5. The oil and gas field mixed fluid loading and unloading system according to claim 3, characterized in that, The exhaust gas discharge branch pipe (4) is connected to the first horizontal pipe section (22), the exhaust gas discharge branch pipe (4) is vertically arranged, and the discharge port (41) is located at the top of the exhaust gas discharge branch pipe (4).

6. The oil and gas field mixed fluid loading and unloading system according to claim 3, characterized in that, The vent pipe (2) also includes a waste gas treatment branch pipe (9), which is connected to the first horizontal pipe section (22) and is connected to the sewage tank (10).

7. An oil and gas field mixed fluid loading and unloading system according to any one of claims 1-6, characterized in that, The exhaust gas collection branch pipe (3) includes an end pipe (7), which is horizontally arranged and has a height of not less than 1m.

8. The oil and gas field mixed fluid loading and unloading system according to claim 7, characterized in that, The end pipe (7) is equipped with a regulating valve (71).

9. The oil and gas field mixed fluid loading and unloading system according to claim 8, characterized in that, The end of the end tube (7) away from the liquid storage tank (1) is detachably connected to a quick connector (72).

10. The oil and gas field mixed fluid loading and unloading system according to claim 9, characterized in that, The end of the terminal pipe (7) away from the liquid storage tank (1) is connected to the transition pipe (8) via the quick connector (72). The transition pipe (8) is adapted to the oil and gas recovery connector (52). The transition pipe (8) includes a PVC steel wire hose.

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