Oil unloading tank for transferring crude oil

Abstract

The utility model discloses an oil unloading tank for transferring crude oil, which comprises a tank body, two opposite ends of the tank body are respectively provided with an injection port and an output port, two layers of filter plates are fixedly connected inside the tank body, the inside of the tank body is divided into three parts by the filter plates, and the three parts are sequentially divided into a first cavity, a second cavity and a third cavity from the injection port to the output port. A sampling assembly is arranged on the outer wall, corresponding to the third cavity, of the box body, blow-down valves are arranged on the inner walls, corresponding to the first cavity and the second cavity, of the box body, and pressure assemblies are arranged on the outer walls of the first cavity and the third cavity. The pressure assembly is arranged in the oil unloading tank body, pressure distribution in the tank body can be changed, pressure difference is formed in the tank body, and crude oil is driven by pressure to penetrate through the filter screen, so that the filtering efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of oil and gas storage and transportation engineering technology, and relates to an unloading tank for crude oil transfer. Background Technology

[0002] In the crude oil collection and processing system of oilfield production, the unloading tank technology at the gathering and transfer station plays a crucial role. Its main function is to safely and efficiently transfer crude oil from a single well via tanker trucks to the storage facilities at the gathering and transfer station. However, during crude oil extraction, crude oil comes into contact with rocks, silt, and other materials in underground reservoirs, inevitably introducing solid particles such as sand and clay. Simultaneously, during pipeline transportation, friction and corrosion may introduce metallic impurities such as iron filings and rust. Subsequent processing of crude oil requires filtering out these impurities. Current technology incorporates filters within the unloading tank to remove impurities. However, due to the high viscosity of crude oil, the speed at which it passes through the filter using only the power of the oil pump is relatively low, resulting in decreased crude oil transfer efficiency. Therefore, there is an urgent need for an unloading tank that can improve filtration efficiency. Utility Model Content

[0003] The purpose of this invention is to provide an unloading tank for crude oil transfer, which solves the problem of low filtration efficiency in existing unloading tanks, leading to a decrease in crude oil transfer efficiency.

[0004] The technical solution adopted by this utility model includes a box body with an injection port and an output port at opposite ends. Two layers of filter plates are fixedly connected inside the box body. The box body is divided into three parts by the filter plates, which are divided into a first chamber, a second chamber, and a third chamber from the injection port to the output port. A sampling component is provided on the outer wall of the box body corresponding to the third chamber. Drain valves are provided on the inner walls of the box bodies corresponding to the first and second chambers. Pressure components are provided on the outer walls of the first and third chambers.

[0005] The features of this utility model also include:

[0006] The filter plate includes a partition fixed to the inner wall of the box, and a filter screen is installed on the side of the partition near the drain valve.

[0007] The filter screen is a nickel foam filter screen, and the pore size of the filter screen near the inlet is larger than that of the filter screen near the outlet.

[0008] The pressure assembly includes a pressure regulating pipe that connects the first chamber and the third chamber from the outer wall of the housing. A pressure regulating pump is fixedly connected to the pressure regulating pipe. The connection between the pressure regulating pipe and the inner wall of the housing is located on the side of the inner wall of the housing away from the drain valve.

[0009] The sampling assembly includes a sampling valve installed on the outer wall of the corresponding third chamber of the housing, and the sampling valve is threadedly connected to a sampling box.

[0010] The sampling valve consists of a threaded pipe exposed outside the housing and a valve body fixed inside the housing. A step is provided at the connection between the two. The valve body is barrel-shaped and its open end is connected to the threaded pipe. Several windows are opened on the outer wall of the valve body, and valve beads are contained inside the valve body.

[0011] The sampling box includes a connecting pipe connected to the sampling valve, a box body fixedly connected to the connecting pipe, a scale strip on the outer wall of the box body, and a sampling tube extending away from the box body fixedly connected inside the threaded pipe. Several windows are opened on the outer wall of the sampling tube.

[0012] Both the valve bead and the sampling tube at the end furthest from the box are magnetic, and the magnetic end of the sampling tube has an arc surface that mates with the valve bead.

[0013] The beneficial effects of this utility model are:

[0014] This invention filters crude oil by installing a double-layer filter plate inside the unloading tank. It also includes a pressure component that creates an uneven pressure environment within the unloading tank by redistributing the gas, thereby driving the crude oil through the filter screen and improving filtration efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the crude oil transfer unloading tank of this utility model;

[0016] Figure 2 This is a schematic diagram of the filter plate in this utility model;

[0017] Figure 3 This is a schematic diagram of the sampling valve in this utility model;

[0018] Figure 4 This is a schematic diagram of the sampling box in this utility model;

[0019] Figure 5 This is a schematic diagram showing the connection between the sampling valve and the sampling box in this utility model.

[0020] In the diagram: 1. Housing; 2. Inlet; 3. Outlet; 4. Filter plate; 5. First chamber; 6. Second chamber; 7. Third chamber; 8. Sampling assembly; 9. Drain valve; 10. Pressure assembly; 11. Filter screen; 12. Partition; 13. Pressure regulating pipe; 14. Pressure regulating pump; 15. Sampling valve; 16. Sampling box; 17. Threaded pipe; 18. Valve body; 19. Valve ball; 20. Connecting pipe; 21. Box body; 22. Scale bar; 23. Sampling tube. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] Example 1:

[0023] like Figure 1 As shown, the device includes a housing 1, with an inlet 2 and an outlet 3 at opposite ends. Two layers of filter plates 4 are fixedly connected inside the housing 1. The interior of the housing 1 is divided into three parts by the filter plates 4, which are a first chamber 5, a second chamber 6, and a third chamber 7 from the inlet 2 to the outlet 3. A sampling component 8 is provided on the outer wall of the housing 1 corresponding to the third chamber 7. Drain valves 9 are provided on the inner walls of the housing 1 corresponding to the first chamber 5 and the second chamber 6. Pressure components 10 are provided on the outer walls of the first chamber 5 and the third chamber 7.

[0024] When crude oil enters the tank from the injection port 2, the pressure in the two chambers can be adjusted by the pressure components on the outer walls of the first chamber 5 and the third chamber 7, creating a pressure difference between the two chambers. The crude oil is driven through the two filter plates 4 by the pressure difference, thereby improving the filtration efficiency of the crude oil.

[0025] After the crude oil transfer is completed, the impurities trapped by the filter plate 4 can be discharged through the drain valve 9 to avoid excessive accumulation of impurities that clog the filter plate 4.

[0026] During the transfer of crude oil, a portion of the crude oil can be extracted through sampling component 8 for testing of indicators such as water content and sulfur content.

[0027] Example 2:

[0028] like Figure 1 and Figure 2 As shown, the device includes a housing 1, with an inlet 2 and an outlet 3 at opposite ends. Two layers of filter plates 4 are fixedly connected inside the housing 1. The interior of the housing 1 is divided into three parts by the filter plates 4, which are a first chamber 5, a second chamber 6, and a third chamber 7 from the inlet 2 to the outlet 3. A sampling component 8 is provided on the outer wall of the housing 1 corresponding to the third chamber 7. Drain valves 9 are provided on the inner walls of the housing 1 corresponding to the first chamber 5 and the second chamber 6. Pressure components 10 are provided on the outer walls of the first chamber 5 and the third chamber 7.

[0029] The filter plate 4 includes a partition 12 fixed to the inner wall of the housing 1, and a filter screen 11 is provided on the side of the partition 12 near the drain valve 9.

[0030] The filter screen 11 is a nickel foam filter screen, and the pore size of the filter screen 11 near the inlet 2 is larger than the pore size of the filter screen 11 near the outlet 3.

[0031] The filter plate 4 consists of two parts: a filter screen 11 and a partition 12. The filter screen 11 separates impurities from crude oil, while the partition 12 forms a sealed space to prevent air from flowing between the chambers through the filter screen 11 when the pressure assembly 10 adjusts the pressure, thereby reducing the filtration speed.

[0032] The nickel foam filter screen has a high porosity and a three-dimensional through-pore structure, allowing more crude oil to pass through within the same filtration area and reducing fluid resistance, thus enabling crude oil to pass smoothly through the filter screen 11. Simultaneously, the nickel foam filter screen exhibits excellent resistance to rapid heating and cooling and good corrosion resistance, preventing deformation or damage due to temperature changes. It remains stable in corrosive media such as acidic and alkaline substances, making it suitable for filtration of viscous crude oil under varying temperature and pH conditions. This ensures the continuity and stability of the filtration process, extends the service life of the filter screen 11, and reduces maintenance costs.

[0033] Example 3:

[0034] like Figure 1 As shown, the device includes a housing 1, with an inlet 2 and an outlet 3 at opposite ends. Two layers of filter plates 4 are fixedly connected inside the housing 1. The interior of the housing 1 is divided into three parts by the filter plates 4, which are a first chamber 5, a second chamber 6, and a third chamber 7 from the inlet 2 to the outlet 3. A sampling component 8 is provided on the outer wall of the housing 1 corresponding to the third chamber 7. Drain valves 9 are provided on the inner walls of the housing 1 corresponding to the first chamber 5 and the second chamber 6. Pressure components 10 are provided on the outer walls of the first chamber 5 and the third chamber 7.

[0035] The pressure assembly 10 includes a pressure regulating pipe 13 that connects the first cavity 5 and the third cavity 7 from the outer wall of the housing 1. A pressure regulating pump 14 is fixedly connected to the pressure regulating pipe 13. The connection between the pressure regulating pipe 13 and the inner wall of the housing 1 is located on the side of the inner wall of the housing 1 away from the drain valve 9.

[0036] The pressure regulating pump 14 can transfer air from the third chamber 7 to the first chamber 5 through the pressure regulating pipe 13, thereby reducing the pressure in the third chamber 7 and increasing the pressure in the first chamber 5. Driven by the pressure, the flow rate of crude oil from the first chamber 5 to the third chamber 7 is increased, allowing it to pass through the filter screen 11 more quickly and improving the filtration efficiency.

[0037] Example 4:

[0038] like Figure 1 and Figure 5As shown, the device includes a housing 1, with an inlet 2 and an outlet 3 at opposite ends. Two layers of filter plates 4 are fixedly connected inside the housing 1. The interior of the housing 1 is divided into three parts by the filter plates 4, which are a first chamber 5, a second chamber 6, and a third chamber 7 from the inlet 2 to the outlet 3. A sampling component 8 is provided on the outer wall of the housing 1 corresponding to the third chamber 7. Drain valves 9 are provided on the inner walls of the housing 1 corresponding to the first chamber 5 and the second chamber 6. Pressure components 10 are provided on the outer walls of the first chamber 5 and the third chamber 7.

[0039] The sampling assembly 8 includes a sampling valve 15 disposed on the outer wall of the third cavity 7 corresponding to the housing 1, and the sampling valve 15 is threadedly connected to a sampling box 16.

[0040] The sampling valve 15 can promptly disconnect the tank 1 from the outside world after sampling is completed, preventing crude oil leakage and pollution.

[0041] Example 5:

[0042] like Figure 1 , Figure 3 and Figure 4 As shown, the device includes a housing 1, with an inlet 2 and an outlet 3 at opposite ends. Two layers of filter plates 4 are fixedly connected inside the housing 1. The interior of the housing 1 is divided into three parts by the filter plates 4, which are a first chamber 5, a second chamber 6, and a third chamber 7 from the inlet 2 to the outlet 3. A sampling component 8 is provided on the outer wall of the housing 1 corresponding to the third chamber 7. Drain valves 9 are provided on the inner walls of the housing 1 corresponding to the first chamber 5 and the second chamber 6. Pressure components 10 are provided on the outer walls of the first chamber 5 and the third chamber 7.

[0043] The sampling assembly 8 includes a sampling valve 15 disposed on the outer wall of the third cavity 7 corresponding to the housing 1, and the sampling valve 15 is threadedly connected to a sampling box 16.

[0044] The sampling valve 15 is divided into a threaded pipe 17 exposed outside the housing 1 and a valve body 18 fixed inside the housing 1. A step is provided at the connection between the two. The valve body 18 is barrel-shaped and its open end is connected to the threaded pipe 17. Several windows are opened on the outer wall of the valve body 18. The valve body 18 contains valve beads 19.

[0045] The sampling box 16 includes a connecting pipe 20 connected to the sampling valve 15. The connecting pipe 20 is fixedly connected to the box body 21. The outer wall of the box body 21 is provided with a scale strip 22. The threaded pipe 17 is fixedly connected to a sampling tube 23 extending away from the box body 21. The outer wall of the sampling tube 23 is provided with several windows.

[0046] The valve ball 19 can move inside the valve body 18. When the housing 1 is filled with crude oil, the valve ball 19 is pressed onto the step between the valve body and the threaded pipe 17 under the action of liquid pressure, blocking the threaded pipe 17 to prevent crude oil from leaking out.

[0047] When sampling is required, the connecting pipe 20 and the threaded pipe 17 are connected. As the connecting pipe 20 is screwed in, the sampling pipe 23 gradually pushes the valve bead 19 to the end of the valve body 18. At this time, crude oil can flow into the box 21 through the window on the surface of the sampling pipe 23 and the valve body 18 to collect crude oil samples.

[0048] After the sampling box 16 is removed from the sampling valve 15, the valve ball 19 re-seals the threaded pipe 17 under the pressure of crude oil to prevent crude oil leakage.

[0049] Example 6:

[0050] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the box body 1 has an inlet 2 and an outlet 3 at opposite ends. Two layers of filter plates 4 are fixedly connected inside the box body 1. The inside of the box body 1 is divided into three parts by the filter plates 4, which are divided into a first chamber 5, a second chamber 6 and a third chamber 7 from the inlet 2 to the outlet 3. A sampling component 8 is provided on the outer wall of the box body 1 corresponding to the third chamber 7. A drain valve 9 is provided on the inner wall of the box body 1 corresponding to the first chamber 5 and the second chamber 6. A pressure component 10 is provided on the outer wall of the first chamber 5 and the third chamber 7.

[0051] The sampling assembly 8 includes a sampling valve 15 disposed on the outer wall of the third cavity 7 corresponding to the housing 1, and the sampling valve 15 is threadedly connected to a sampling box 16.

[0052] The sampling valve 15 is divided into a threaded pipe 17 exposed outside the housing 1 and a valve body 18 fixed inside the housing 1. A step is provided at the connection between the two. The valve body 18 is barrel-shaped and its open end is connected to the threaded pipe 17. Several windows are opened on the outer wall of the valve body 18. The valve body 18 contains valve beads 19.

[0053] The sampling box 16 includes a connecting pipe 20 connected to the sampling valve 15. The connecting pipe 20 is fixedly connected to the box body 21. The outer wall of the box body 21 is provided with a scale strip 22. The threaded pipe 17 is fixedly connected to a sampling tube 23 extending away from the box body 21. The outer wall of the sampling tube 23 is provided with several windows.

[0054] Both the valve bead 19 and the sampling tube 23 have magnetic ends away from the box body, and the magnetic end of the sampling tube 23 is provided with an arc surface that cooperates with the valve bead 19.

[0055] The valve ball 19 and the sampling tube 23 are connected by magnetic force. When the sampling box 16 is taken out, the valve ball 19 moves accordingly to block the threaded tube 17, thus avoiding a small amount of crude oil leakage caused by the failure to block the threaded tube 17 in time.

[0056] This invention utilizes a pressure assembly to create a pressure difference within the oil tank 1, which drives crude oil through the filter screen 11, improving the filtration efficiency. A valve is also included for crude oil sampling; under normal conditions, the valve closes due to the crude oil pressure within the tank 1, and it closes quickly upon completion of sampling to prevent leakage.

[0057] Working principle:

[0058] During crude oil transfer, inlet 2 is connected to the tanker truck, and outlet 3 is connected to the oil storage facility. Crude oil enters tank 1 from the tanker truck through inlet 2. When the crude oil level is higher than filter screen 11, pressure regulating pump 14 is activated to send air from the second chamber 6 and the third chamber 7 into the first chamber 5, maintaining a high-pressure state in the first chamber 5 and a negative-pressure state in the second chamber 6 and the third chamber 7. Under the action of pressure, crude oil is forced to move from the first chamber 5 to the third chamber 7, improving the crude oil filtration efficiency.

[0059] After the crude oil transfer is completed, the filtered impurities can be discharged through the drain valve 9.

[0060] When crude oil needs to be sampled during the transfer of crude oil, the sampling box 16 can be fixed to the sampling valve 15 through the connecting pipe 20 and the threaded pipe 17. During the threaded connection of the connecting pipe 20 and the threaded pipe 17, the sampling pipe 23 gradually pushes open the valve ball 19, so that the crude oil enters the box 21 through the window on the surface of the valve body 18 and the sampling pipe 23 for sampling.

[0061] After sampling is completed, the connecting tube 20 is unscrewed. During this process, the sampling tube 23 drives the valve ball 19 to move through magnetic force, so that it re-seals the threaded tube 17.

Claims

1. An oil unloading tank for crude oil transfer, characterized in that, The box includes a housing (1), with an injection port (2) and an output port (3) respectively at opposite ends. Two layers of filter plates (4) are fixedly connected inside the housing (1). The housing (1) is divided into three parts by the filter plates (4), from the injection port (2) to the output port (3), namely a first cavity (5), a second cavity (6) and a third cavity (7). The outer wall of the housing (1) corresponding to the third cavity (7) is provided with a sampling component (8). The inner walls of the housing (1) corresponding to the first cavity (5) and the second cavity (6) are provided with drain valves (9). The outer walls of the first cavity (5) and the third cavity (7) are provided with pressure components (10).

2. The unloading tank for crude oil transfer according to claim 1, characterized in that, The filter plate (4) includes a partition (12) fixed to the inner wall of the box (1), and a filter screen (11) is provided on the side of the partition (12) near the drain valve (9).

3. The unloading tank for crude oil transfer according to claim 2, characterized in that, The filter screen (11) is a nickel foam filter screen, and the pore size of the filter screen (11) near the injection port (2) is larger than the pore size of the filter screen (11) near the output port (3).

4. The unloading tank for crude oil transfer according to claim 1, characterized in that, The pressure assembly (10) includes a pressure regulating pipe (13) that connects the first cavity (5) and the third cavity (7) from the outer wall of the housing (1). A pressure regulating pump (14) is fixedly connected to the pressure regulating pipe (13). The connection between the pressure regulating pipe (13) and the inner wall of the housing (1) is located on the side of the inner wall of the housing (1) away from the drain valve (9).

5. The unloading tank for crude oil transfer according to claim 1, characterized in that, The sampling assembly (8) includes a sampling valve (15) disposed on the outer wall of the box (1) corresponding to the third cavity (7), and the sampling valve (15) is threadedly connected to a sampling box (16).

6. The unloading tank for crude oil transfer according to claim 5, characterized in that, The sampling valve (15) is divided into a threaded pipe (17) exposed outside the box (1) and a valve body (18) fixed inside the box (1), and a step is provided at the connection between the two. The valve body (18) is barrel-shaped and its open end is connected to the threaded pipe (17). Several windows are opened on the outer wall of the valve body (18), and valve beads (19) are contained inside the valve body (18).

7. The unloading tank for crude oil transfer according to claim 6, characterized in that, The sampling box (16) includes a connecting pipe (20) connected to the sampling valve (15), the connecting pipe (20) is fixedly connected to a box body (21), the outer wall of the box body (21) is provided with a scale strip (22), the threaded pipe (17) is fixedly connected to a sampling tube (23) extending away from the box body (21), and the outer wall of the sampling tube (23) is provided with several windows.

8. The unloading tank for crude oil transfer according to claim 7, characterized in that, The valve bead (19) and the sampling tube (23) are both magnetic at the ends away from the box body. The magnetic end of the sampling tube (23) is provided with an arc surface that cooperates with the valve bead (19).

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