A rapid separation device for crude oil mixtures

Abstract

This utility model relates to the field of petroleum extraction technology, specifically to an oil-gas-water mixture separation device for petroleum extraction. A rapid crude oil mixture separation device includes a shell and an oil-gas-water separation tank nested within the shell. The oil-gas-water separation tank is equipped with an inlet pipe, an outlet pipe, a water outlet pipe, and an oil outlet pipe extending out of the shell. The water outlet pipe also has a branch oil discharge channel. The water outlet pipe is located at the bottom of the oil-gas-water separation tank, and the oil outlet pipe is located above 1 / 2 of the tank's length. A stirring device is also provided inside the oil-gas-water separation tank. One side wall of the oil-gas-water separation tank and the corresponding side wall of the shell are both made of transparent tempered glass. This invention has a clear technical concept and is simple to apply, providing an implementable separation method and device for achieving rapid and efficient separation of high-water-content crude oil mixtures.

Description

Technical Field

[0001] This utility model relates to the field of petroleum extraction technology, specifically to a petroleum extraction oil-gas-water mixture separation device. Background Technology

[0002] Oil-water separation units are key equipment in oil and gas production processes, primarily used to efficiently separate oil, water, and gas from produced crude oil mixtures (a mixture of oil, natural gas, water, and solid impurities) for subsequent processing. Traditional gravity sedimentation separation technology relies on natural stratification due to density differences, but this is inefficient, time-consuming, and difficult to rapidly separate crude oil mixtures. Currently used high-efficiency separation technologies include centrifugal separation, hydrocyclone separation, electro-dehydration / coalescing of emulsified oil, membrane separation, and magnetic separation, each with its own advantages and disadvantages depending on the application. With the advancement of water injection development in oilfields, entering a high-water-cut stage, higher demands are placed on crude oil mixture separation units. These units need to be intelligent and rapidly improve separation efficiency while reducing energy consumption and costs. Therefore, a multi-stage combination of gravity sedimentation, centrifugal separation, and hydrocyclone separation technologies can be used to balance separation efficiency and energy consumption. In practical applications, the selection or optimization of separation units must be based on specific oilfield conditions (oil properties, water cut, environmental requirements, etc.). Summary of the Invention

[0003] The present invention aims to provide a rapid separation device for crude oil mixtures to address the above-mentioned problems.

[0004] The technical solution of this utility model is as follows: a rapid separation device for crude oil mixture, including an outer shell and an oil-gas-water separation tank nested inside the outer shell; the oil-gas-water separation tank is provided with an inlet pipe, an outlet pipe, a water outlet pipe and an oil outlet pipe extending out of the outer shell, and the water outlet pipe is also provided with a branch oil discharge branch; wherein, the water outlet pipe is located at the bottom of the oil-gas-water separation tank, and the oil outlet pipe is located above 1 / 2 of the oil-gas-water separation tank; a stirring device is also provided inside the oil-gas-water separation tank; wherein, one side wall of the oil-gas-water separation tank and the corresponding side wall of the outer shell are both transparent tempered glass plates.

[0005] The stirring device includes a rotating impeller located at the bottom of the oil-gas-water separator, and an electric motor located outside the outer casing. The output shaft of the electric motor extends into the oil-gas-water separator and is connected to the rotating impeller.

[0006] The liquid inlet pipe is connected to an oil-gas-water mixture conveying device; the gas outlet pipe is connected to a gas storage tank; the water outlet pipe is connected to a water storage tank; and the oil outlet pipe is connected to an oil storage tank.

[0007] The inlet end of the branch oil drain line is connected to the water outlet pipe, and the outlet end is connected to the oil storage tank.

[0008] Valves are installed on the liquid inlet pipe, air outlet pipe, water outlet pipe, oil outlet pipe, and branch oil discharge line.

[0009] The inlet pipe is equipped with an inlet pipe valve, the outlet pipe is equipped with an outlet pipe valve, the water outlet pipe is equipped with an outlet pipe valve, the oil outlet pipe is equipped with an oil outlet pipe valve, and the branch oil discharge line is equipped with a branch oil discharge line valve.

[0010] The technical advantages of this utility model are as follows:

[0011] This invention offers a clear technical approach and simple application, providing a feasible separation method and apparatus for the rapid and efficient separation of high-water-content crude oil mixtures. This invention employs a combined centrifugal and gravity sedimentation separation technology. A stirring device drives the oil-gas-water mixture to rotate rapidly. Due to the density differences between oil, gas, and water, the centrifugal forces experienced by each component during rotation are different, accelerating the oil-gas-water separation speed. The least dense gas rises rapidly to the top of the oil-gas-water separation tank and is discharged through the gas outlet pipe. The less dense oil droplets rise rapidly, while the more dense water droplets fall rapidly, thus causing the oil-water mixture to separate into layers within the tank. The oil-water interface is observed through a tempered glass plate. By controlling the oil outlet pipe, water outlet pipe, and branch oil discharge lines, the oil and water are discharged separately for subsequent processing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a rapid crude oil mixture separation device according to the present invention.

[0013] Reference numerals in the attached diagram: 1. Outer casing; 2. Liquid inlet pipe; 3. Liquid inlet pipe valve; 4. Oil-gas-water separator; 5. Rotating impeller; 6. Tempered glass plate; 7. Gas outlet pipe; 8. Gas outlet pipe valve; 9. Gas storage tank; 10. Oil outlet pipe; 11. Oil outlet pipe valve; 12. Oil storage tank; 13. Electric motor; 14. Water outlet pipe; 15. Water outlet pipe valve; 16. Water storage tank; 17. Branch oil drain line; 18. Branch oil drain line valve. Detailed Implementation

[0014] Example 1

[0015] A rapid crude oil mixture separation device includes a shell 1 and an oil-gas-water separation tank 4 nested inside the shell 1. The oil-gas-water separation tank 4 is provided with an inlet pipe 2, an outlet pipe 7, a water outlet pipe 14, and an oil outlet pipe 10 extending out of the shell 1. The water outlet pipe 14 is also provided with a branch oil discharge channel 17. The water outlet pipe 14 is located at the bottom of the oil-gas-water separation tank 4, and the oil outlet pipe 10 is located above 1 / 2 of the oil-gas-water separation tank 4. The oil-gas-water separation tank 4 is also provided with a stirring device. One side wall of the oil-gas-water separation tank 4 and the corresponding side wall of the shell 1 are both transparent tempered glass plates 6.

[0016] The specific implementation process of this embodiment is as follows:

[0017] The inlet pipe 2 delivers the oil-gas-water mixture to the oil-gas-water separator 4. The liquid level of the oil-gas-water mixture in the oil-gas-water separator 4 can be observed through the transparent tempered glass plate 6. When the oil-gas-water mixture fills the oil-gas-water separator 4, the inlet of the oil-gas-water mixture is stopped.

[0018] The stirring device is turned on, causing the oil-gas-water mixture to rotate rapidly, accelerating the separation speed. Due to the density difference between oil, gas, and water, the centrifugal forces experienced by each component during rotation are different. The least dense gas rises rapidly to the top of the oil-gas-water separator 4 and is discharged through the gas outlet pipe 7; the less dense oil droplets rise rapidly, and the more dense water droplets fall rapidly, thus causing the oil-water mixture to separate into layers within the oil-gas-water separator 4. The position of the oil-water interface within the oil-gas-water separator 4 can be observed through the transparent tempered glass plate 6.

[0019] If the oil-water interface is above the oil outlet pipe 10, first lower the oil-water interface to the position of the oil outlet pipe 10 through the water outlet pipe 14, stop draining through the water outlet pipe 14, then drain all the oil through the oil outlet pipe 10, and then drain the remaining water through the water outlet pipe 14.

[0020] If the oil-water interface is below the oil outlet pipe 10, drain water directly through the water outlet pipe 14 to lower the oil-water interface to the position of the water outlet pipe 14 and then stop draining. Then, drain the remaining oil in the oil-gas-water separator 4 through the branch oil drain line 17.

[0021] Example 2

[0022] Based on Embodiment 1, the device further includes: a rotating impeller 5 located at the bottom of the oil-gas-water separator 4, and a motor 13 located outside the outer casing 1, wherein the output shaft of the motor 13 extends into the oil-gas-water separator 4 and is connected to the rotating impeller 5.

[0023] Example 3

[0024] Based on Embodiment 2, the following are also included: the liquid inlet pipe 2 is connected to an oil-gas-water mixture conveying device; the gas outlet pipe 7 is connected to a gas storage tank 9; the water outlet pipe 14 is connected to a water storage tank 16; the oil outlet pipe 10 is connected to an oil storage tank 12; the inlet end of the branch oil discharge branch 17 is connected to the water outlet pipe 14, and the outlet end is connected to the oil storage tank 12.

[0025] Example 4

[0026] Based on embodiment 3, it also includes: valves are provided on the liquid inlet pipe 2, the gas outlet pipe 7, the water outlet pipe 14, the oil outlet pipe 10 and the branch oil discharge branch 17.

[0027] The specific implementation process of this embodiment is as follows:

[0028] When in use, first open the inlet pipe valve 3, and the inlet pipe 2 will send the oil-gas-water mixture into the oil-gas-water separator 4. Observe the liquid level of the oil-gas-water mixture in the oil-gas-water separator 4 through the transparent tempered glass plate 6. When the oil-gas-water mixture fills the oil-gas-water separator 4, close the inlet pipe valve 3 and stop feeding the oil-gas-water mixture into the oil-gas-water separator 4.

[0029] Turn on the motor 13, which drives the rotating impeller 5 to rotate the oil-gas-water mixture rapidly in the oil-gas-water separator 4, thus accelerating the oil-gas-water separation speed. Due to the density difference between oil, gas, and water, the centrifugal forces experienced by the gas, oil, and water during the rotation are different, and the gas with the lowest density moves rapidly to the top of the oil-gas-water separator 4. Open the gas outlet valve 8 and discharge the gas into the gas storage tank 9 through the gas outlet pipe 7 for storage.

[0030] Oil droplets with lower density rise rapidly, while water droplets with higher density descend rapidly, causing the oil-water mixture to separate into layers within the oil-gas-water separator 4. The position of the oil-water interface within the oil-gas-water separator 4 can be observed through the transparent tempered glass plate 6.

[0031] If the oil-water interface is above the oil outlet pipe 10, first open the water outlet pipe valve 15, and discharge some water into the water storage tank 16 through the water outlet pipe 14 to lower the oil-water interface to the position of the oil outlet pipe 10. Then close the water outlet pipe valve 15 to stop the drainage through the water outlet pipe 14. Next, open the oil outlet pipe valve 11, and discharge all the oil into the oil storage tank 12 through the oil outlet pipe 10 for storage. The remaining water is discharged into the water storage tank 16 through the water outlet pipe 14 for storage.

[0032] If the oil-water interface is below the oil outlet pipe 10, directly open the water outlet pipe valve 15 and discharge water into the water storage tank 16 through the water outlet pipe 14. When the oil-water interface in the oil-gas-water separator 4 drops to the water outlet pipe 14, observe through the transparent tempered glass plate 6. Then close the water outlet pipe valve 15, open the branch oil discharge valve 18, and discharge the remaining oil in the oil-gas-water separator 4 into the oil storage tank 12 through the branch oil discharge line 17.

Claims

1. A crude oil mixture rapid separation device, characterized by, The system includes an outer shell (1) and an oil-gas-water separator (4) nested inside the outer shell (1). The oil-gas-water separator (4) is provided with an inlet pipe (2), an outlet pipe (7), a water outlet pipe (14), and an oil outlet pipe (10) extending out of the outer shell (1). The water outlet pipe (14) is also provided with a branch oil discharge branch (17). The water outlet pipe (14) is located at the bottom of the oil-gas-water separator (4), and the oil outlet pipe (10) is located above 1 / 2 of the oil-gas-water separator (4). The oil-gas-water separator (4) is also provided with a stirring device inside. One side wall of the oil-gas-water separator (4) and the corresponding side wall of the outer shell (1) are both transparent tempered glass plates (6).

2. The crude oil mixture rapid separation device according to claim 1, characterized in that, The stirring device includes a rotating impeller (5) located at the bottom of the oil-gas-water separator (4), and an electric motor (13) located outside the outer shell (1). The output shaft of the electric motor (13) extends into the oil-gas-water separator (4) and is connected to the rotating impeller (5).

3. The crude oil mixture rapid separation device according to claim 1, characterized in that, The liquid inlet pipe (2) is connected to an oil-gas-water mixture conveying device; the gas outlet pipe (7) is connected to a gas storage tank (9); the water outlet pipe (14) is connected to a water storage tank (16); and the oil outlet pipe (10) is connected to an oil storage tank (12).

4. The crude oil mixture rapid separation device according to claim 3, characterized in that, The inlet end of the branch oil drain line (17) is connected to the water outlet pipe (14), and the outlet end is connected to the oil storage tank (12).

5. The crude oil mixture rapid separation device according to claim 1, characterized in that, Valves are provided on the liquid inlet pipe (2), air outlet pipe (7), water outlet pipe (14), oil outlet pipe (10) and branch oil discharge line (17).

6. The rapid separation device for crude oil mixture according to claim 5, characterized in that, The inlet pipe (2) is equipped with an inlet pipe valve (3), the outlet pipe (7) is equipped with an outlet pipe valve (8), the outlet water pipe (14) is equipped with an outlet water pipe valve (15), the outlet oil pipe (10) is equipped with an outlet oil pipe valve (11), and the branch oil drain line (17) is equipped with a branch oil drain line valve (18).

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