A device for recovering crude oil from a sludge tank

Abstract

This utility model discloses a device for recovering crude oil from sludge tanks, relating to the field of oilfield cluster well platform development and production technology. It includes multiple sludge tanks, each with an outlet valve installed at the center of its bottom. One end of the outlet valve is fixedly connected to a first connecting pipe. A power mechanism, including a gear pump, is located on one side of the first connecting pipe. One end of the gear pump is fixedly connected to an inlet pipe, which is connected to the first connecting pipe. The other end is fixedly connected to an outlet pipe, with a first control valve installed at one end. A medium flow direction mechanism is located on one side of the power mechanism, and a receiving mechanism is located on the other side. This utility model uses a newly constructed gear pump as the power source and, with the supporting construction of related processes, rationally utilizes existing processes to achieve safe, efficient, and low-cost recovery of crude oil from sludge tanks. It is labor-saving to operate and suitable for recovering crude oil from mixed liquids in sludge tanks to multi-functional tanks.

Description

Technical Field

[0001] This utility model relates to the field of oilfield cluster well platform development and production technology, specifically to a device for recovering crude oil from a sewage tank. Background Technology

[0002] In the oil extraction process, existing equipment typically consists of storage tanks, pumps, pipeline systems, and separation systems. Storage tanks are used to store the mixed liquid generated during wastewater discharge, pumps are used to extract the liquid, pipeline systems are responsible for transporting the liquid, and separation systems are used to separate crude oil from water and other impurities. When the liquid in the wastewater tank reaches a certain level, the pumps are activated through the control system to extract the liquid. The liquid is then transported through pipelines to the separation system. During the separation process, physical methods such as gravity or centrifugal force are used to separate crude oil from water and solid impurities. After separation, the crude oil is collected in a special container, while the water and impurities are discharged or further processed.

[0003] A secondary oil-water separation device, such as one disclosed in patent publication number CN222218700U, includes a separation tank with an inlet pipe on its side wall. The other end of the inlet pipe is connected to a crude oil storage tank. A level gauge is installed on the side wall of the separation tank. An oil drain pipe and a sewage drain pipe are respectively installed at the bottom of the separation tank. The oil drain pipe is connected to the crude oil storage tank, and the sewage drain pipe is connected to a wastewater tank. This device is used for secondary separation of the initially separated oil-water mixture in the crude oil storage tank. Through this secondary oil-water separation device, wastewater and crude oil are further separated. The crude oil content in the wastewater entering the wastewater tank through the sewage drain pipe is significantly reduced, allowing the crude oil to be recovered to the crude oil storage tank to the greatest extent possible. After multiple cycles, the crude oil in the storage tank has high purity, further ensuring the quality of the crude oil in the storage tank. This device reduces the difficulty of wastewater treatment without increasing the cost of crude oil treatment.

[0004] The aforementioned equipment and similar devices generally require one pump truck and two tank trucks. Operators first connect the pump truck and tank trucks, then climb onto the top of the sludge tank, extending the pump truck's inlet line to the bottom. After starting the pump truck, they closely observe the oil-water interface inside the sludge tank. Another operator climbs onto the top of the tank truck to observe the liquid discharge; if oil is detected in the pipeline, the pump truck is immediately stopped. The pump truck's outlet line is then connected to the other tank truck, and the pump truck is started to pump the crude oil from the sludge tank into the other tank truck. This process requires a total of two operators, two tank trucks, and one boiler truck, resulting in low operating efficiency and high production costs. Therefore, a new and practical crude oil recovery device for sludge tanks needs to be developed to safely, efficiently, and cost-effectively recover crude oil from sludge tanks. Utility Model Content

[0005] The purpose of this invention is to provide a device for recovering crude oil from a sewage tank, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for recovering crude oil from sewage tanks, comprising multiple sewage tanks, an outlet valve installed at the center of the bottom of each sewage tank, a first connecting pipe fixedly connected to one end of the outlet valve, a power mechanism provided on one side of the first connecting pipe, the power mechanism including a gear pump, an inlet pipe fixedly connected to one end of the gear pump, the inlet pipe and the first connecting pipe being connected, and an outlet pipe fixedly connected to the other end of the gear pump, a first control valve installed at one end of the outlet pipe, a medium flow direction mechanism provided on one side of the power mechanism for conveying sewage oil, and a receiving mechanism provided on one side of the medium flow direction mechanism for receiving sewage oil.

[0007] Furthermore, the medium flow mechanism includes a second connecting pipe, one end of which is equipped with a second control valve, which is connected to the discharge pipe.

[0008] Furthermore, an oil well body is installed on one side of the second connecting pipe, a vent head is fixedly connected to one side of the oil well body, and metering pipelines and gathering pipelines are fixedly connected to both sides of the oil well body.

[0009] Furthermore, the receiving mechanism includes a metering trunk line connected to a metering pipeline, and a first collection and transmission trunk line is provided on one side of the metering trunk line, which is connected to the collection and transmission pipeline.

[0010] Furthermore, a collection and transmission valve assembly is installed between the metering trunk line and the first collection and transmission trunk line.

[0011] Furthermore, a second collection and transmission line is fixedly connected to one side of the metering trunk line and the first collection and transmission trunk line, and a multi-functional tank is fixedly connected to one end of the second collection and transmission trunk line.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This device is used to recover crude oil from sewage tanks. It uses a newly built gear pump as a power source and is equipped with related process flows. It makes reasonable use of the original process flows to achieve safe, efficient and low-cost recovery of crude oil from sewage tanks. It is labor-saving to operate and is suitable for recovering crude oil from mixed liquids in sewage tanks to multi-functional tanks.

[0014] After the crude oil recovery unit was applied on-site, it solved the problem of needing two tank trucks and one pump truck to recover crude oil from the sewage tank, avoiding the use of pump trucks and tank trucks and saving on special vehicle costs. It also avoided the safety and environmental risks during tank truck transportation and reduced the labor intensity of employees. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] In the diagram: 1. Sludge tank; 2. Outlet valve; 3. First connecting pipe; 4. Feed pipe; 5. Gear pump; 6. Discharge pipe; 7. First control valve; 8. Second control valve; 9. Second connecting pipe; 10. Oil well body; 11. Vent head; 12. Metering pipeline; 13. Gathering and transmission pipeline; 14. Metering trunk line; 15. First gathering and transmission trunk line; 16. Gathering and transmission valve group; 17. Second gathering and transmission trunk line; 18. Multifunctional tank. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the process of oil extraction, recovery equipment is required. The recovery equipment provided by this utility model is specifically used for crude oil recovery operations in the oil extraction process. During the recovery operation, it is necessary to conduct a comprehensive inspection of the equipment regularly, including key components such as valves, pipelines, and pumps, to ensure their normal operation. Damaged or aging parts should be identified and replaced in a timely manner. During the operation of the equipment, the pipeline connections and valves should be checked regularly for leaks. If any abnormality is found, the machine should be stopped immediately to ensure environmental safety and the cleanliness of the surrounding environment to prevent debris from clogging the pipelines and affecting the transportation efficiency.

[0019] like Figure 1As shown, this utility model provides a technical solution: a device for recovering crude oil from sewage tanks, comprising multiple sludge tanks 1. An outlet valve 2 is installed at the center of the bottom of each sludge tank 1. One end of the outlet valve 2 is fixedly connected to a first connecting pipe 3. A power mechanism is provided on one side of the first connecting pipe 3, including a gear pump 5. One end of the gear pump 5 is fixedly connected to a feed pipe 4, which is connected to the first connecting pipe 3. The other end is fixedly connected to a discharge pipe 6, with a first control valve 7 installed at one end. A medium flow mechanism is provided on one side of the power mechanism for conveying sludge oil, and a receiving mechanism is provided on one side of the medium flow mechanism for receiving sludge oil. The medium flow mechanism includes a second connecting pipe 9, with a second control valve 7 installed at one end. The control valve 8 is connected to the discharge pipe 6. The oil well body 10 is installed on one side of the second connecting pipe 9. The vent head 11 is fixedly connected to one side of the oil well body 10. The metering pipeline 12 and the gathering pipeline 13 are fixedly connected to both sides of the oil well body 10. The receiving mechanism includes a metering trunk line 14, which is connected to the metering pipeline 12. A first gathering pipeline 15 is provided on one side of the metering trunk line 14. The first gathering pipeline 15 is connected to the gathering pipeline 13. A gathering valve group 16 is installed between the metering trunk line 14 and the first gathering pipeline 15. A second gathering pipeline 17 is fixedly connected to one side of the metering trunk line 14 and the first gathering pipeline 15. A multi-functional tank 18 is fixedly connected to one end of the second gathering pipeline 17.

[0020] It is important to note that the base of gear pump 5 should be placed perpendicular to the sludge tank 1. A filter device should be installed at the inlet of gear pump 5, and the discharge pipe 6 of gear pump 5 should be parallel to the ground. The relevant process flow consists of gear pump 5, inlet pipe 4, discharge pipe 6, outlet valve 2, and first connecting pipe 3. This device uses gear pump 5 as a power source and is equipped with related process flows. By rationally utilizing the existing process flow, it achieves safe, efficient, and low-cost recovery of crude oil from the sludge tank. Operation is labor-saving, and it is suitable for recovering crude oil from mixed liquids in sludge tanks. This multi-functional tank 18 industry solves the problem of needing two tank trucks and one pump truck for recovering crude oil from sludge tanks, avoiding the use of pump trucks and tank trucks and saving on special vehicle costs. It also avoids the safety and environmental risks during tank truck transportation and reduces the labor intensity of employees.

[0021] Example 1: Operation method for recovering crude oil from the sludge tank via the metering pipeline 12 of the well platform. 1. Open the metering valve on the gathering and transportation valve group 16, leading to the multi-functional tank 18; 2. Open the metering valve on the pumping well process of this well platform, and close the gathering and transportation valve; 3. Open the outlet valve 2 and the first control valve 7 of the gear pump 5; 4. Open the outlet valve 2 on all sludge tanks 1 and the first connecting pipe 3; 5. Rotate the gear pump; after the gear pump 5 is free from obstruction, start the gear pump 5; 6. Observe that the entire crude oil recovery device is operating normally, with no leakage, achieving the purpose of recovering crude oil from the sludge tank.

[0022] Example 2: Operation method for recovering crude oil from the sludge tank via the gathering and transportation pipeline 13 of this well platform. 1. Open the metering valve on the gathering and transportation valve group 16, leading to the multi-functional tank 18; 2. Open the metering valve on the pumping well process of this well platform, and close the gathering and transportation valve; 3. Open the outlet valve 2 and the first control valve 7 of the gear pump 5; 4. Open the outlet valve 2 on all sludge tanks 1 and the first connecting pipe 3; 5. Rotate the gear pump; after the gear pump 5 is free from obstruction, start the gear pump 5; 6. Observe that the entire crude oil recovery device is operating normally, with no leakage, achieving the purpose of recovering crude oil from the sludge tank.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A device for recovering crude oil from sludge tanks, comprising multiple sludge tanks (1), characterized in that: An outlet valve (2) is installed at the center of the bottom of the sludge tank (1). One end of the outlet valve (2) is fixedly connected to a first connecting pipe (3). A power mechanism is provided on one side of the first connecting pipe (3). The power mechanism includes a gear pump (5). One end of the gear pump (5) is fixedly connected to a feed pipe (4). The feed pipe (4) and the first connecting pipe (3) are connected. The other end is fixedly connected to a discharge pipe (6). A first control valve (7) is installed on one end of the discharge pipe (6). A medium flow direction mechanism is provided on one side of the power mechanism for conveying sludge. A receiving mechanism is provided on one side of the medium flow direction mechanism for receiving sludge.

2. The device for recovering crude oil from a sludge tank according to claim 1, characterized in that: The medium flow mechanism includes a second connecting pipe (9), one end of which is equipped with a second control valve (8), and the second control valve (8) is connected to the discharge pipe (6).

3. The device for recovering crude oil from a sludge tank according to claim 2, characterized in that: The oil well body (10) is installed on one side of the second connecting pipe (9), and a venting head (11) is fixedly connected to one side of the oil well body (10). Metering pipeline (12) and gathering pipeline (13) are fixedly connected to both sides of the oil well body (10).

4. The device for recovering crude oil from a sludge tank according to claim 1, characterized in that: The receiving mechanism includes a metering trunk line (14), which is connected to a metering pipeline (12). A first collection and transmission trunk line (15) is provided on one side of the metering trunk line (14), which is connected to a collection and transmission pipeline (13).

5. The device for recovering crude oil from a sludge tank according to claim 4, characterized in that: A collection valve assembly (16) is installed between the metering trunk line (14) and the first collection trunk line (15).

6. The device for recovering crude oil from a sludge tank according to claim 4, characterized in that: The metering trunk line (14) and the first collection and transmission trunk line (15) are fixedly connected to a second collection and transmission trunk line (17) on one side, and a multi-functional tank (18) is fixedly connected to one end of the second collection and transmission trunk line (17).

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