Pilot test device for high-voltage electrostatic modification of crude oil

Abstract

The utility model relates to a pilot test device for high-voltage electrostatic modification of crude oil, which is characterized in that the pilot test device for high-voltage electrostatic modification of crude oil is skid-mounted and is arranged above a movable underframe; the utility model discloses a crude oil high-voltage electrostatic modification pilot test device which comprises a detection meter, a constant-temperature assembly, a stirring kettle, a delivery pump, a high-voltage processor, a high-voltage power supply, a crude oil collector, a control electric box and an electromagnetic valve, by using the skid-mounted crude oil high-pressure modification experimental device, in oil pipelines with different viscosities or contents, the three different forms of high-pressure processors also improve the variable condition of the test, the actual use effect of the high-pressure processors in various forms is analyzed, and the overall test efficiency of the experimental device is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of crude oil modification pilot test, and specifically relates to a pilot test device for high-voltage electrostatic modification of crude oil. Background Art

[0002] The production and transportation of high-viscosity heavy crude oil has great technical limitations. Due to the high content of paraffin, colloid and asphaltene in high-viscosity crude oil, its fluidity is poor. Generally, some physical or chemical methods are needed to modify or modify these oil products to reduce viscosity and improve fluidity. So far, the viscosity reduction methods used by various oil fields in the production and gathering process mainly include: heating transportation process, adding chemical agents to reduce viscosity transportation process, adding thin oil to reduce viscosity transportation process and modifying and reducing viscosity transportation process. In addition, there are some methods that are being developed and explored, such as microbial viscosity reduction, ultrasonic viscosity reduction, microwave viscosity reduction and electric field viscosity reduction.

[0003] In the prior art, the patent number of "Experimental Device for Testing the Performance of Carbon Dioxide Solubilizing and Viscosity Reducing Agent" is CN210293971U. The carbon dioxide cylinder is connected to the gas storage tank through a booster pump, and then connected to the high-pressure phase equilibrium kettle through the gas storage tank; the additive tank is connected to the high-pressure phase equilibrium kettle through a high-pressure infusion pump, and the crude oil tank is connected to the high-pressure phase equilibrium kettle through a pipeline; the upper output of the high-pressure phase equilibrium kettle is connected to the gas phase collecting bottle, and the lower output end is connected to the liquid phase collecting bottle. Carbon dioxide, heavy oil and chemicals are injected into the high-pressure phase equilibrium kettle, and the output end is connected to the gas phase collecting bottle and the liquid phase collecting bottle. The gas and liquid samples are collected respectively through two sample collecting bottles, and the volume of carbon dioxide in the sample is measured by a gas flow meter to obtain the mass of carbon dioxide, and the solubility is calculated based on this. After multiple tests, the viscosity and fluidity of the heavy oil are significantly improved, thereby achieving the purpose of improving the recovery rate.

[0004] Among the existing technologies, electric field modification and viscosity reduction is a relatively cutting-edge novel technology. Simply put, electric field modification is to apply a high-voltage electric field of a certain intensity to crude oil for a few seconds to reduce viscosity and yield stress. For some waxy crude oils, the viscosity near the pour point can be reduced by more than 80%, and the yield stress reduction rate can reach 90%, while its energy consumption is only 1% of the heating energy consumption when the same viscosity reduction rate is achieved. This method was first proposed by Tao et al. of Temple University in 2006, and has received support from many parties, and a small-scale field test has been carried out. Subsequently, many scholars have carried out research related to the electric field modification of crude oil.

[0005] Among them, QS Energy proposed a new type of oil viscosity reduction technology in 2019, which uses a high-voltage electric field to force hydrocarbons and other particles in crude oil to aggregate in chains along the flow direction, thereby significantly reducing viscosity. This can greatly reduce the use of diluents (an additive) in heavy crude oil, thereby increasing production.

[0006] In the 11th issue of Volume 40 of the monthly journal "Oil & Gas Storage and Transportation" in November 2021, the research progress of electric field modification technology for crude oil was proposed. Applying a high-voltage electric field (electric field strength greater than 0.2 kV / mm) to flowing or static crude oil for a few seconds can achieve significant immediate viscosity reduction effects, and the viscosity reduction rate can reach 90% near the solidification temperature; electric field treatment has a significant effect on weakening the gelling structure of waxy crude oil, which is beneficial to improving the safety of pipeline shutdown and restart; electric field treatment is efficient and energy-saving, and the energy consumption required for electric field treatment to achieve the same viscosity reduction effect is only 1% of that of the heating method; the composition of the modified crude oil remains unchanged, and does not affect subsequent refining and processing; the viscosity of the electric field modified crude oil gradually increases with the electric field treatment time, and the viscosity reduction effect can last about 1 day, while the modification effect of gelled crude oil lasts much longer; the modification effects and stability of different crude oils vary greatly, and the electric field modification technology is not yet mature enough, mainly because the modification effects of different crude oils vary greatly, and the stability of the modification effect needs to be further improved. Although the interface polarization theory can qualitatively explain the electrorheological behavior of crude oil that has been observed so far, it still cannot quantitatively explain the obvious differences in the electric field modification effects of different crude oils.

[0007] To this end, a pilot test device is needed that can be easily connected to various crude oil pipelines through skid mounting to test the overall process of electric field viscosity reduction one by one, so as to compare various different schemes and conduct further in-depth research on the electric field viscosity reduction technology. Summary of the invention

[0008] In order to solve the above problems, this paper proposes a pilot test device for high-voltage electrostatic modification of crude oil. The pilot test device for high-voltage electrostatic modification of crude oil is skid-mounted and is arranged above a mobile chassis. The pilot test device for high-voltage electrostatic modification of crude oil includes a detection meter, a constant temperature component, a stirring kettle, a delivery pump, a high-voltage processor, a high-voltage power supply, a crude oil collector, a control electrical box and a solenoid valve. The constant temperature component, the stirring kettle, the delivery pump, the high-voltage processor and the crude oil collector are connected in series in sequence. The constant temperature component includes a heater, a heat exchanger or a DC tube. The heater, the heat exchanger or the DC tube are connected in parallel with each other. The oil inlet and outlet of the constant temperature component, the outlet end of the stirring kettle, the outlet end of the delivery pump and the high-voltage processor are connected in series. The oil outlet of the processor is provided with a sampling port, the high-pressure processor includes a vertical processor, a horizontal processor and a cylindrical processor, the vertical processor, the horizontal processor and the cylindrical processor are connected in parallel with each other, and the outlet ends of the vertical processor, the horizontal processor and the cylindrical processor are provided with a sampling port. By using a skid-mounted crude oil high-pressure modification experimental device, it is convenient to connect crude oil to various oil pipelines with different viscosities or contents for modification experiments, so that various data under various conditions can be tested according to different experimental samples, which is convenient for the subsequent research and development of mass production equipment, and the three different forms of high-pressure processors also improve the variable conditions of the test, analyze the actual use effects of various forms of high-pressure processors, and improve the overall test efficiency of the test device.

[0009] The movable chassis at the bottom of the crude oil high-voltage electrostatic modification pilot test device is surrounded by cofferdams, an inlet is provided at one end of the crude oil high-voltage electrostatic modification pilot test device, and an outlet is provided at the other end of the crude oil high-voltage electrostatic modification pilot test device. Both the inlet and outlet are provided with skid-mounted ports, the inlet is skid-mounted and connected to the oil pipeline, the outlet is skid-mounted and connected to the crude oil collector or the oil pipeline, a detection gauge group is provided between the inlet and the constant temperature component, the constant temperature component includes a pressure gauge, a temperature gauge and a flow meter, a sampling port is provided between the constant temperature component and the detection gauge group, the crude oil is directly flushed out of the oil pipeline, the skid-mounted type is convenient for testing in crude oil in various situations, and the drawn crude oil can also be directly tested through the detection gauge group, so as to facilitate the determination of the subsequent test method, or directly lead it back to the oil pipeline to realize the modification of the crude oil return pipe.

[0010] The thermostatic component includes a heater, a heat exchanger and a direct current pipe, which are connected in parallel with each other. Solenoid valves are provided at both ends of the heater, the heat exchanger and the direct current pipe. The heater is an electric heater. The heat exchanger is cyclically connected with a refrigerator. A temperature gauge is provided at the oil outlet of the thermostatic component. A sampling port is provided between the temperature gauge at the oil outlet of the thermostatic component and the stirring kettle, so that the crude oil can maintain the constant temperature required for the test. Through three different heaters, heat exchangers or direct current pipes, the crude oil can be quickly led out to the required constant temperature, which is convenient for subsequent processing and also convenient for adjusting the temperature for the test.

[0011] The stirring kettle is a vertical circulation stirring kettle, an oil inlet is arranged on the outer side of the upper part of the stirring kettle, an oil outlet is arranged on the outer side of the lower part of the stirring kettle, a temperature gauge and a pressure gauge are arranged at the oil outlet of the stirring kettle in sequence, a sampling port is arranged between the pressure gauge at the oil outlet of the stirring kettle and the delivery pump, the crude oil stirred by the stirring kettle can make the impurities inside the crude oil and other excess substances be fully mixed, thereby improving the stability of the crude oil during subsequent high-pressure treatment.

[0012] The delivery pump is a booster delivery pump. The oil outlet of the delivery pump is provided with a pressure gauge, a temperature gauge and a flow meter in sequence. A sampling port is provided between the flow meter at the oil outlet of the delivery pump and the high-pressure processor. The delivery pump is used to re-pressurize and speed up the crude oil with a reduced flow rate after stirring, so that it can be quickly filled into the high-pressure processor to increase the overall reaction speed of the crude oil inside the high-pressure processor. Before entering the high-pressure processor, the crude oil is observed again to check the values ​​of the test meter group to ensure that the crude oil entering the high-pressure processor has the required parameters.

[0013] The vertical processor has a plurality of rectangular electric field guides arranged vertically inside, the horizontal processor has a plurality of circular electric field guides arranged horizontally inside, and the cylindrical processor has a plurality of nested cylindrical electric field guides arranged inside.

[0014] Solenoid valves are provided at both ends of the vertical processor, the horizontal processor and the cylindrical processor. Sampling ports are provided on the outside of the solenoid valves at the oil outlets of the vertical processor, the horizontal processor and the cylindrical processor. Solenoid valves are provided at the parallel connections of the vertical processor, the horizontal processor and the cylindrical processor. Pressure gauges and temperature gauges are provided at the total outlets of the vertical processor, the horizontal processor and the cylindrical processor in turn. The positive and negative electrodes of the vertical processor, the horizontal processor and the cylindrical processor are respectively connected to two sets of high-voltage power supplies, and can enter different forms of high-voltage processors at the same time, or only enter one high-voltage processor, which makes it convenient to make a variety of comparative tests, improve the variable range, and use a wide range of various adjustable high-pressure processing parameters to facilitate testing of crude oil effects of various parameters.

[0015] The control electrical box is connected to the test meter, solenoid valve, constant temperature component, stirring kettle, delivery pump and high-voltage processor through cables. The circuit connection and circuit control of the entire experimental device are carried out through the control electrical box, thereby realizing convenient test control.

[0016] Beneficial effects:

[0017] By using a skid-mounted crude oil high-pressure modification experimental device, it is convenient to connect crude oil to various oil pipelines with different viscosities or contents for modification experiments, so that various data under various conditions can be tested according to different experimental samples, which is convenient for the subsequent research and development of mass production equipment. The three different forms of high-pressure processors also increase the test variables, analyze the actual use effects of various forms of high-pressure processors, and improve the overall test efficiency of the test device.

[0018] The crude oil is directly flushed out of the oil pipeline. It is skid-mounted, which is convenient for testing crude oil in various situations. The crude oil can also be directly tested through the test table group, so as to determine the subsequent test method, or directly lead it back to the oil pipeline to realize the modified return pipe of the crude oil.

[0019] The crude oil is kept at the constant temperature required for the test. Through three different heaters, heat exchangers or direct current pipes, the crude oil can be quickly drawn to the required constant temperature, which is convenient for subsequent processing and also convenient for adjusting the test temperature.

[0020] The crude oil after stirring can allow the impurities and other excess substances inside the crude oil to be fully mixed, thereby improving the stability of the crude oil during subsequent high-pressure processing.

[0021] The crude oil with reduced flow rate after stirring is re-pressurized and re-speeded up through a delivery pump, so that it can be quickly filled into the high-pressure processor to increase the overall reaction speed of the crude oil inside the high-pressure processor. Before entering the high-pressure processor, the crude oil is observed again and the values ​​of the test table group are checked to ensure that the crude oil entering the high-pressure processor has the required parameters.

[0022] It is possible to enter different types of high-voltage processors at the same time, or to enter only one high-voltage processor, which makes it easy to conduct a variety of comparative tests and increase the range of variables.

[0023] Through a wide range of adjustable high pressure processing parameters, it is easy to test the effects of various parameters on crude oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic flow chart of a pilot test device for high voltage electrostatic modification of crude oil;

[0025] In the figure; 1. oil pipeline, 2. test meter, 3. sampling port, 4. heater, 5. heat exchanger, 6. refrigerator, 7. stirring kettle, 8. delivery pump, 9. vertical processor, 10. horizontal processor, 11. cylinder processor, 12. high voltage power supply, 13. crude oil collector, 14. control electrical box. DETAILED DESCRIPTION

[0026] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0027] Oil pipeline 1, test meter 2, sampling port 3, heater 4, heat exchanger 5, refrigerator 6, stirring tank 7, delivery pump 8, vertical processor 9, horizontal processor 10, cartridge processor 11, high voltage power supply 12, crude oil collector 13, control electrical box 14.

[0028] like Figure 1 As shown;

[0029] A pilot test device for high-voltage electrostatic modification of crude oil, the pilot test device for high-voltage electrostatic modification of crude oil is skid-mounted, and the pilot test device for high-voltage electrostatic modification of crude oil is arranged above a mobile chassis. The pilot test device for high-voltage electrostatic modification of crude oil includes a detection meter 2, a constant temperature component, a stirring kettle 7, a delivery pump 8, a high-voltage processor, a high-voltage power supply 12, a crude oil collector 13, a control electric box 14 and a solenoid valve. The constant temperature component, the stirring kettle 7, the delivery pump 8, the high-voltage processor and the crude oil collector 13 are connected in series in sequence. The constant temperature component includes a heater 4, a heat exchanger 5 or a DC tube, and the heater 4, the heat exchanger 5 or the DC tube are connected in parallel with each other. The oil inlet and oil outlet of the constant temperature component, the outlet end of the stirring kettle 7, the delivery pump 8, the high-voltage processor and the crude oil collector 13 are connected in series in sequence. The outlet end of the delivery pump 8 and the oil outlet of the high-pressure processor are both provided with a sampling port 3, the high-pressure processor comprises a vertical processor 9, a horizontal processor 10 and a cylindrical processor 11, the vertical processor 9, the horizontal processor 10 and the cylindrical processor 11 are connected in parallel with each other, and the outlet ends of the vertical processor 9, the horizontal processor 10 and the cylindrical processor 11 are all provided with a sampling port 3, a cofferdam is arranged around the mobile chassis at the bottom of the crude oil high-pressure electrostatic modification pilot test device, an inlet end is arranged at one end of the crude oil high-pressure electrostatic modification pilot test device, and an outlet end is arranged at the other end of the crude oil high-pressure electrostatic modification pilot test device, and the inlet end and the outlet end are both provided with a skid-mounted port, the inlet end skid-mounted is connected to the oil pipeline 1, and the outlet end skid-mounted is connected to the original The oil collector 13 is connected to the oil pipeline 1, and 2 groups of detection meters are arranged between the inlet end and the thermostatic component. The thermostatic component includes a pressure gauge, a temperature gauge and a flow meter. A sampling port 3 is arranged between the thermostatic component and the detection meter group. The thermostatic component includes a heater 4, a heat exchanger 5 and a DC pipe. The heater 4, the heat exchanger 5 and the DC pipe are connected in parallel with each other. Electromagnetic valves are arranged at both ends of the heater 4, the heat exchanger 5 and the DC pipe. The heater 4 is an electric heater 4. The heat exchanger 5 is circulated with a refrigerator 6. A temperature meter is arranged at the oil outlet of the thermostatic component. A sampling port 3 is arranged between the temperature meter at the oil outlet of the thermostatic component and the stirring tank 7. The stirring tank 7 is a vertical circulation type stirring tank 7. The upper outer side of the stirring tank 7 is provided with There is an oil inlet, an oil outlet is arranged on the outer side of the lower part of the stirring kettle 7, a temperature gauge and a pressure gauge are arranged at the oil outlet of the stirring kettle 7 in sequence, a sampling port 3 is arranged between the pressure gauge at the oil outlet of the stirring kettle 7 and the delivery pump 8, the delivery pump 8 is a booster delivery pump 8, a pressure gauge, a temperature gauge and a flow meter are arranged at the oil outlet of the delivery pump 8 in sequence, a sampling port 3 is arranged between the flow meter at the oil outlet of the delivery pump 8 and the high-pressure processor, a plurality of rectangular electric field guides are arranged vertically inside the vertical processor 9, a plurality of circular electric field guides are arranged horizontally inside the horizontal processor 10, a plurality of nested cylindrical electric field guides are arranged inside the cylindrical processor 11, and electromagnetic valves are arranged at both ends of the vertical processor 9, the horizontal processor 10 and the cylindrical processor 11,The outside of the oil outlet solenoid valve of the vertical processor 9, the horizontal processor 10 and the cartridge processor 11 is provided with a sampling port 3, and the parallel connection of the vertical processor 9, the horizontal processor 10 and the cartridge processor 11 is provided with a solenoid valve. The total outlet of the vertical processor 9, the horizontal processor 10 and the cartridge processor 11 is provided with a pressure gauge and a temperature gauge in turn. The positive and negative electrodes of the vertical processor 9, the horizontal processor 10 and the cartridge processor 11 are respectively connected to two groups of high-voltage power supplies 12, and the control electric box 14 is respectively connected to the detection meter 2, the solenoid valve, the constant temperature component, the stirring kettle 7, the delivery pump 8 and the high-voltage processor through cables.

[0030] Implementation examples;

[0031] a. The highly viscous crude oil first enters the detection table group 2 through the oil pipeline 1 to detect the parameters of the crude oil;

[0032] b. According to the tested crude oil parameters, the crude oil is flowed into the constant temperature group of the heater 4, the heat exchanger 5 or the direct current pipe to keep the crude oil at a constant temperature required for the test;

[0033] c. The crude oil at a constant temperature is input into the stirring kettle 7 for uniform stirring;

[0034] d. The fully stirred crude oil is again sent into the detection table 2 group 2 through the delivery pump 8 to detect the parameters of the stirred crude oil;

[0035] e. The crude oil according to the detected data is input into high pressure processors of different forms;

[0036] f. The crude oil enters the high-voltage processor, and the high-voltage processor discharges the crude oil through the high-voltage power supply 12 to modify the crude oil;

[0037] g. Adjust the modification parameters of the high-voltage processor, power supply voltage range: 50kv-100kv, field strength range of the high-voltage processor: 1000-3000V / mm, modification treatment time range: 3-15min;

[0038] h. The modified crude oil flows into the crude oil collector 13, and the modified crude oil is observed and tested.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pilot test device for high voltage electrostatic modification of crude oil, It is characterized in that The crude oil high-voltage electrostatic modification pilot test device is skid-mounted, and the crude oil high-voltage electrostatic modification pilot test device is arranged above the mobile chassis. The crude oil high-voltage electrostatic modification pilot test device includes a detection meter, a constant temperature component, a stirring kettle, a delivery pump, a high-voltage processor, a high-voltage power supply, a crude oil collector, a control electric box and a solenoid valve. The constant temperature component, the stirring kettle, the delivery pump, the high-voltage processor and the crude oil collector are connected in series in sequence. The constant temperature component includes a heater, a heat exchanger or a DC tube, and the heater, the heat exchanger or the DC tube are connected in parallel with each other. The oil inlet and oil outlet of the constant temperature component, the outlet end of the stirring kettle, the outlet end of the delivery pump and the oil outlet of the high-voltage processor are all provided with sampling ports. The high-voltage processor includes a vertical processor, a horizontal processor and a cylindrical processor. The vertical processor, the horizontal processor and the cylindrical processor are connected in parallel with each other, and the outlet ends of the vertical processor, the horizontal processor and the cylindrical processor are all provided with sampling ports.

2. A pilot test device for high voltage electrostatic modification of crude oil according to claim 1, It is characterized in that The movable chassis at the bottom of the crude oil high-voltage electrostatic modification pilot test device is provided with cofferdams around it, an inlet end is provided at one end of the crude oil high-voltage electrostatic modification pilot test device, and an outlet end is provided at the other end of the crude oil high-voltage electrostatic modification pilot test device. The inlet end and the outlet end are both provided with skid-mounted ports, the inlet end is skid-mounted and connected to the oil pipeline, and the outlet end is skid-mounted and connected to the crude oil collector or the oil pipeline.

3. A pilot test device for high voltage electrostatic modification of crude oil according to claim 2, It is characterized in that A detection meter group is arranged between the inlet end and the thermostatic component. The thermostatic component comprises a pressure gauge, a temperature gauge and a flow meter. A sampling port is arranged between the thermostatic component and the detection meter group.

4. A pilot test device for high voltage electrostatic modification of crude oil according to claim 1, It is characterized in that The thermostatic component includes a heater, a heat exchanger and a direct current tube. The heater, heat exchanger and direct current tube are connected in parallel with each other. Solenoid valves are provided at both ends of the heater, heat exchanger and direct current tube. The heater is an electric heater. The heat exchanger is cyclically connected to the refrigerator. A temperature gauge is provided at the oil outlet of the thermostatic component. A sampling port is provided between the temperature gauge at the oil outlet of the thermostatic component and the stirring kettle.

5. A pilot test device for high voltage electrostatic modification of crude oil according to claim 1, It is characterized in that The stirring kettle is a vertical circulation stirring kettle, an oil inlet is arranged on the outer side of the upper part of the stirring kettle, an oil outlet is arranged on the outer side of the lower part of the stirring kettle, a temperature gauge and a pressure gauge are arranged at the oil outlet of the stirring kettle in sequence, and a sampling port is arranged between the pressure gauge at the oil outlet of the stirring kettle and the delivery pump.

6. A pilot test device for high voltage electrostatic modification of crude oil according to claim 1, It is characterized in that The delivery pump is a booster delivery pump, the oil outlet of the delivery pump is provided with a pressure gauge, a temperature gauge and a flow meter in sequence, and a sampling port is provided between the flow meter at the oil outlet of the delivery pump and the high pressure processor.

7. A pilot test device for high voltage electrostatic modification of crude oil according to claim 1, It is characterized in that The vertical processor is provided with a plurality of rectangular electric field guides vertically, the horizontal processor is provided with a plurality of circular electric field guides horizontally, and the cylindrical processor is provided with a plurality of nested cylindrical electric field guides.

8. A pilot test device for high voltage electrostatic modification of crude oil according to claim 1, It is characterized in that Both ends of the vertical processor, horizontal processor and cylindrical processor are provided with solenoid valves, the outer sides of the solenoid valves of the oil outlets of the vertical processor, horizontal processor and cylindrical processor are provided with sampling ports, the parallel connections of the vertical processor, horizontal processor and cylindrical processor are provided with solenoid valves, and the total outlet ends of the vertical processor, horizontal processor and cylindrical processor are provided with pressure gauges and temperature gauges respectively.

9. A pilot test device for high voltage electrostatic modification of crude oil according to claim 1, It is characterized in that The positive and negative electrodes of the vertical processor, the horizontal processor and the cylindrical processor are respectively connected to two groups of high-voltage power supplies.

10. A pilot test device for high voltage electrostatic modification of crude oil according to claim 1, It is characterized in that The control electric box is connected to the detection meter, the electromagnetic valve, the constant temperature component, the stirring kettle, the delivery pump and the high-voltage processor respectively through cables.

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