Crude oil pour point testing device, testing system and testing method

Abstract

This invention belongs to the field of petroleum extraction technology and discloses a crude oil pour point testing device, testing system, and testing method. The crude oil pour point testing device includes a shell, a float assembly, a temperature control assembly, and an excitation output assembly. The shell has a sealed cavity configured to hold the oil sample to be tested. The float assembly includes a float body, an inertial sensing element, and a temperature sensing element. The inertial sensing element is integrated inside the float body, which is placed inside the cavity and floats on the surface of the oil sample. The inertial sensing element can detect the motion response of the float body in the oil sample. The temperature sensing element is connected to the float body and can extend into the oil sample to measure its temperature. The temperature control assembly is connected to the shell and can adjust the temperature of the oil sample inside the cavity. The excitation output assembly is connected to the shell and outputs rotational excitation to the shell. This crude oil pour point testing device has a simple structure, precise temperature control, high testing efficiency, and high detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of petroleum extraction technology, and in particular to a crude oil pour point testing device, testing system and testing method. Background Technology

[0002] In the oil extraction and transportation system, pipeline transportation is widely used for long-distance crude oil transportation due to its significant advantages such as large capacity, low energy consumption, low loss and high safety.

[0003] The pour point, a core physical characteristic parameter of crude oil, is defined as the highest temperature at which crude oil loses its fluidity. Its value directly determines the stability of crude oil transportation in pipelines. When the transportation temperature is below the pour point, wax crystals in the crude oil will quickly precipitate and adhere to the pipe wall to form a wax layer. This not only increases pipeline transportation resistance and transportation energy consumption, but in severe cases, it can also cause crude oil to solidify and block the pipeline (i.e., "pipeline blockage"), leading to transportation shutdowns and causing huge economic losses and safety risks.

[0004] Existing technologies include various crude oil pour point testing instruments based on different working principles, covering ultrasonic testing, microwave resonance, fiber optic sensing, and differential scanning calorimetry. However, these methods still fall short of meeting the stable operation requirements of industrial sites for the following reasons: First, insufficient testing accuracy: Due to the complex composition of crude oil, such as viscosity, sand content, and water content, some instruments are prone to data drift, failing to accurately match the true pour point value of crude oil under actual operating conditions. Second, high operating and maintenance costs: Some equipment has complex structures and cumbersome calibration procedures, requiring high levels of professional expertise from operators. Furthermore, core components are susceptible to wear or blockage by wax crystals and impurities in the crude oil, leading to frequent pipe blockage failures, resulting in significant subsequent maintenance workload and high costs for consumable replacement. Third, lack of real-time performance and stability: Although some instruments claim to have online testing capabilities, they suffer from delayed detection response and poor continuous operation stability, failing to achieve uninterrupted real-time data output throughout the day, making it difficult to support dynamic, continuous, and precise control of the transportation process.

[0005] Therefore, there is an urgent need for a crude oil pour point testing device, testing system, and testing method to solve the above problems. Summary of the Invention

[0006] According to one aspect of the present invention, a crude oil pour point testing device is provided, which has a simple structure, precise temperature control, high testing efficiency, and high detection accuracy.

[0007] To achieve this objective, the present invention adopts the following technical solution: The crude oil pour point testing device includes: The housing has a sealed cavity inside, which is configured to hold the oil sample to be tested. A float assembly includes a float body, an inertial sensing element, and a temperature sensing element. The inertial sensing element is integrated inside the float body. The float body is placed in the cavity and floats on the surface of the oil sample to be tested. The inertial sensing element can detect the motion response of the float body in the oil sample to be tested. The temperature sensing element is connected to the float body and can extend into the oil sample to measure the temperature of the oil sample to be tested. A temperature control component, connected to the housing, is capable of adjusting the temperature of the oil sample to be tested within the cavity; An excitation output component is connected to the housing and is used to output rotational excitation to the housing.

[0008] Optionally, the float assembly further includes anti-slip ribs, which are disposed at the bottom of the float body and can extend into the oil to be tested, and the temperature detection element is disposed at the bottom of the anti-slip ribs.

[0009] Optionally, the temperature regulating assembly includes a temperature regulating element connected to the housing for heating or cooling the oil sample to be tested inside the cavity.

[0010] Optionally, the temperature regulating component further includes a temperature control unit, which is communicatively connected to both the temperature regulating element and the temperature sensing element. The temperature control unit is capable of receiving temperature signals from the temperature sensing element and controlling the temperature and speed of the temperature regulating element during heating or cooling.

[0011] Optionally, the excitation output component includes a connecting gear and a driving member. The connecting gear is fixed to the housing, and the output end of the driving member is connected to the connecting gear in a transmission manner. The driving member can drive the connecting gear to drive the housing to reciprocate.

[0012] Optionally, the housing includes a bottom shell and a top cover, the top cover being fastened to the top opening of the bottom shell, forming a sealed cavity with the bottom shell, the cavity being filled with a protective gas before the oil to be tested is injected.

[0013] Optionally, the side wall of the bottom shell is provided with an oil inlet branch pipe communicating with the cavity, and the bottom of the side wall of the bottom shell opposite to the oil inlet branch pipe or the bottom wall of the bottom shell is provided with an oil outlet branch pipe communicating with the cavity. Both the oil inlet branch pipe and the oil outlet branch pipe are equipped with opening and closing valves.

[0014] Optionally, the crude oil pour point testing device further includes a control component and a display component. The control component is communicatively connected to the inertial sensor, the temperature sensor, the temperature regulating component, the excitation output component, and the display component. The control component can receive response signals from the inertial sensor and temperature signals from the temperature sensor. The control component can also control the heating or cooling of the temperature regulating component, the opening and closing of the excitation output component, and the motion parameters. The control component can also control the display component to display the response signal, the temperature signal, and the motion parameters.

[0015] According to another aspect of the present invention, a crude oil pour point testing system is provided, the crude oil pour point testing system comprising a crude oil pour point testing device as described in any of the preceding claims, wherein a plurality of the crude oil pour point testing devices are arranged in parallel, and the plurality of crude oil pour point testing devices are capable of simultaneously or separately performing pour point testing on the oil product to be tested.

[0016] According to another aspect of the present invention, a method for testing the pour point of crude oil is provided, wherein the method employs the crude oil pour point testing apparatus as described in any of the preceding claims to test the pour point of the oil product to be tested, comprising: S100. Place the float assembly into the cavity of the housing and seal the cavity; S200, Inject the oil to be tested into the cavity; S300: Control the temperature regulation component to cool the oil sample to be tested in the cavity, and control the excitation output component to output rotation excitation to the housing; S400. Determine the pour point of the oil to be tested based on the response signal of the inertial detection device.

[0017] The beneficial effects of this invention are: The crude oil pour point testing device provided by this invention uses a sealed cavity to hold the oil sample to be tested, preventing the loss of light components and improving measurement accuracy. A temperature sensing element connected to the float body can extend into the oil sample, directly contacting it and avoiding the lag and errors of indirect temperature measurement through the cavity wall in traditional devices. This allows for real-time and accurate temperature measurement of the oil sample. The device utilizes a temperature regulation component and an excitation output component. During the cooling process of the oil sample, a controllable slight rotational excitation is applied. An inertial sensor built into the float body captures the float body's motion response. Based on the dynamic relationship between the float body's response signal and the excitation, the device determines the transition of the oil sample from a fluid to a solid state, thus deriving the pour point. The device has a simple overall structure, precise temperature control, high testing efficiency, and high detection accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the crude oil pour point testing device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the float assembly provided in an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of the crude oil pour point testing system provided in an embodiment of the present invention; Figure 4 This is a top view of the crude oil pour point testing system provided in this embodiment of the invention; Figure 5 This is a flowchart of the crude oil pour point testing method provided in the embodiments of the present invention.

[0020] In the picture: 100. The oil product to be tested; 1. Shell; 11. Bottom shell; 12. Top cover; 13. Cavity; 14. Protective gas layer; 15. Oil inlet branch pipe; 16. Oil outlet branch pipe; 17. Opening and closing valve; 2. Float assembly; 21. Float body; 22. Inertia detection component; 23. Temperature detection component; 24. Anti-slip ribs; 3. Temperature control components; 4. Excitation output component; 41. Connecting gear; 42. Drive component; 43. Bracket; 5. Control components; 6. Display components; 10. Housing; 20. Oil inlet manifold; 30. Oil outlet manifold. Detailed Implementation

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0029] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] This embodiment provides a crude oil pour point testing device, which can accurately measure the pour point of crude oil, thereby effectively ensuring the stability and safety of long-distance crude oil transportation. Figure 1 and Figure 2 As shown, the crude oil pour point testing device includes a shell 1, a float assembly 2, a temperature regulating assembly 3, and an excitation output assembly 4.

[0031] The housing 1 contains a sealed cavity 13 configured to hold the oil sample 100 to be tested. The float assembly 2 includes a float body 21, an inertial sensing element 22, and a temperature sensing element 23. The inertial sensing element 22 is integrated inside the float body 21, which is placed within the cavity 13 and floats on the surface of the oil sample 100. The inertial sensing element 22 detects the motion response of the float body 21 within the oil sample 100. The temperature sensing element 23 is connected to the float body 21 and extends into the oil sample 100 to measure its temperature. The temperature regulating assembly 3 is connected to the housing 1 and regulates the temperature of the oil sample 100 within the cavity 13. The excitation output assembly 4 is connected to the housing 1 and outputs rotational excitation to the housing 1. Holding the oil sample 100 within the sealed cavity 13 prevents the loss of light components, thus improving measurement accuracy. The temperature detection element 23 is connected to the float body 21 and can extend into the oil sample 100 to be tested. The temperature detection element 23 directly contacts the oil sample 100 to be tested, avoiding the lag and error of the traditional device that measures temperature indirectly through the cavity wall. It can measure the temperature of the oil sample 100 to be tested in real time and accurately.

[0032] This crude oil pour point testing device utilizes a temperature control component 3 and an excitation output component 4. During the cooling process of the oil sample 100 to be tested, a controllable slight rotational excitation is applied to the oil sample 100. The motion response of the float body 21 is captured by an inertial detection element 22 built into the float body 21. Based on the change in the dynamic relationship between the response signal of the float body 21 and the excitation, the transition of the oil sample 100 from a fluid state to a solid state is determined, thereby obtaining the pour point of the oil sample 100. The device has a simple overall structure, precise temperature control, high testing efficiency, and high detection accuracy.

[0033] Optionally, such as Figure 2 As shown, the float body 21 of the float assembly 2 has a sheet-like structure. The float body 21 is made of polytetrafluoroethylene material wrapped around aluminum foam, with an overall density of 0.55 g / cm³. 3 It has a diameter of 20 mm and a length of 50 mm. The density of the float body 21 is lower than that of the oil sample 100 to be tested, so that it can float on the surface of the oil sample 100.

[0034] Specifically, the inertial sensing element 22 employs a MEMS (Micro-Electro-Mechanical Systems) accelerometer and / or gyroscope to measure the motion response of the float body 21 in real time. In this embodiment, the float body 21 internally embeds a ST LSM6DSV16X six-axis IMU (Inertial Measurement Unit) chip, measuring 2.5×3.0×0.83mm, and is packaged in a quad flat no-leads (QFN) package to facilitate real-time measurement of the angular velocity and linear acceleration of the float body 21 on the surface of the oil sample 100.

[0035] More specifically, the float assembly 2 also includes anti-slip ribs 24. The anti-slip ribs 24 are located at the bottom of the float body 21 and can extend into the oil sample 100 to be tested. In this embodiment, two anti-slip ribs 24 are specifically provided, symmetrically arranged at the bottom of the float body 21. The anti-slip ribs 24 can extend into the oil sample 100 to be tested, embedding a wax crystal network when the oil sample 100 solidifies, effectively preventing relative slippage between the float body 21 and the solidified oil sample, ensuring that the signal collected by the inertial detection element 22 accurately reflects the motion state of the oil sample 100 to be tested.

[0036] More specifically, the temperature sensing element 23 is disposed at the bottom of the anti-slip rib 24. In this embodiment, a PT100 temperature sensor is embedded in the bottom of the anti-slip rib 24. The temperature sensing element 23 is in direct contact with the oil sample 100 to be tested, and is used to accurately measure the real-time temperature of the oil sample 100 around the float body 21. This positional design ensures that the temperature sensing element 23 is always inside the oil sample 100 to be tested, avoiding temperature measurement lag caused by wax deposition.

[0037] Optionally, continue to refer to Figure 1 The housing 1 includes a bottom shell 11 and a top cover 12. The top cover 12 is fastened to the top opening of the bottom shell 11, forming a sealed cavity 13. The bottom shell 11 has a flat cubic structure with external dimensions of 100mm × 80mm × 40mm and a wall thickness of 3mm. The flat design helps to reduce the temperature gradient inside the oil sample 100 being tested, and the internal volume of the cavity 13 is designed to ensure that the oil sample 100 occupies approximately 3 / 4 of the space. The bottom shell 11 is specifically made of copper. Copper has excellent thermal conductivity, ensuring uniform temperature of the oil sample 100 within the cavity 13. The top cover 12 is a flange cover, detachably and sealingly connected to the bottom shell 11 using bolts, etc., to facilitate opening the housing 1 for cleaning and replacement of the float assembly 2.

[0038] Specifically, the inner surface of cavity 13 is coated with a thin layer of polytetrafluoroethylene, which helps to prevent wax crystals from sticking.

[0039] More specifically, the cavity 13 is filled with a protective gas before the oil sample 100 is injected. This protective gas can specifically be nitrogen. Nitrogen is pre-filled into the cavity 13 before the oil sample 100 is injected, and after the oil sample 100 is injected, a protective gas layer 14 is formed above it. Under the pressure of the oil sample 100, the nitrogen occupies approximately 1 / 4 of the internal space of the cavity 13, which can prevent the loss of light components from volatilization and improve the accuracy of pour point detection.

[0040] More specifically, the side wall of the bottom shell 11 is provided with an oil inlet branch pipe 15 communicating with the cavity 13, and the bottom of the side wall of the bottom shell 11 opposite to the oil inlet branch pipe 15 or the bottom wall of the bottom shell 11 is provided with an oil outlet branch pipe 16 communicating with the cavity 13. In this embodiment, the oil inlet branch pipe 15 is located in the middle of the narrow side of the cavity 13 and is located below the liquid surface of the oil to be tested 100, so as to inject the oil to be tested 100 into the cavity 13. The oil outlet branch pipe 16 is located at the bottom edge of the opposite side, so as to discharge the tested oil. Exemplarily, both the oil inlet branch pipe 15 and the oil outlet branch pipe 16 can be selected as high-pressure steel wire reinforced rubber hoses.

[0041] Furthermore, both the inlet branch pipe 15 and the outlet branch pipe 16 are equipped with on / off valves 17. The on / off valve 17 can be a solenoid valve as in the prior art, used to control the opening and closing of the inlet branch pipe 15 or the outlet branch pipe 16.

[0042] Continue to refer to Figure 1 The temperature regulating assembly 3 includes a temperature regulating element (not shown). The temperature regulating element is connected to the housing 1 and is used to heat or cool the oil sample 100 to be tested inside the cavity 13.

[0043] Specifically, the temperature regulating component is a thermoelectric cooler. The thermoelectric cooler is attached to the entire circumference and bottom of the outer surface of the base shell 11, and heats or cools the cavity 13 through the thermoelectric effect. Proactively supplying power to the thermoelectric cooler puts it into a cooling state, cooling the cavity 13 and performing a pour point test on the oil sample 100. Proactively supplying power to the thermoelectric cooler switches it from a cooling state to a heating state, restoring the fluidity of the oil sample 100 and performing a hot wash to prevent wax buildup inside the crude oil pour point testing device. For example, the power of the thermoelectric cooler is 200W.

[0044] More specifically, the temperature regulating component 3 also includes a temperature control unit (not shown). The temperature control unit is communicatively connected to both the temperature regulating element and the temperature detection element 23. The temperature control unit can receive temperature signals from the temperature detection element 23 and can also control the temperature and speed of the temperature regulating element during heating or cooling. In this embodiment, the temperature control unit can control the operating current and direction of the semiconductor cooling chip according to instructions from an external control system, achieving precise control of the temperature of the oil sample 100 to be tested within the cavity 13. For example, the temperature control unit has a programmed cooling function, which can cool the oil sample 100 at a set rate (e.g., 0.1~1.0℃ / min). The temperature control unit also has a programmed heating function, which can rapidly heat the oil sample 100 at a set rate (e.g., 5℃ / min) to restore its fluidity and achieve a hot washing function.

[0045] Continue to refer to Figure 1 The excitation output component 4 includes a connecting gear 41 and a driving member 42. The connecting gear 41 is fixedly connected to the housing 1, and the output end of the driving member 42 is connected to the connecting gear 41 for transmission. The driving member 42 can drive the connecting gear 41 to drive the housing 1 to reciprocate. In this embodiment, the connecting gear 41 is mounted on the bottom corner of the side wall of the housing 1 via a bracket 43, and the fixed end of the driving member 42 is mounted on a fixed position such as the ground. A transmission gear is coaxially arranged on the output shaft of the driving member 42, and the transmission gear meshes with the connecting gear 41. The driving member 42 can output power according to the program instructions of the external control system, and drive the connecting gear 41 and the housing 1 to reciprocate at a small angle through the transmission gear.

[0046] For example, the drive element 42 can be a servo motor from the prior art. The servo motor employs a motion curve with extremely small acceleration (e.g., <0.01g) to avoid violent movement that could damage the wax crystal network structure forming inside the oil sample 100. In this embodiment, the servo motor (50W power) works in conjunction with a reducer, outputting a torque of 5N·m, which drives the connecting gear 41 and the housing 1 to reciprocate at ±1° via a transmission gear, with a rotation cycle of 2 seconds.

[0047] Optionally, such as Figure 1 and Figure 4 As shown, the crude oil pour point testing device also includes a control component 5 and a display component 6. The control component 5 is communicatively connected to the inertial sensor 22, the temperature sensor 23, the temperature regulating component 3, the excitation output component 4, and the display component 6. The control component 5 can receive response signals from the inertial sensor 22 and temperature signals from the temperature sensor 23. The control component 5 can also control the heating or cooling of the temperature regulating component 3, the opening and closing of the excitation output component 4, and the motion parameters. The control component 5 can also control the display component 6 to display the response signals, temperature signals, and motion parameters.

[0048] Specifically, the control component 5 can be an industrial controller or an embedded system, such as a PLC (Programmable Logic Controller). The control component 5 is electrically connected to the temperature control unit, the drive unit 42, the opening and closing valve 17, the temperature sensor, and the inertial sensing unit 22, and is used to execute test programs, collect data, analyze and process data, output results, and remotely transmit data to the control center.

[0049] More specifically, the display component 6 can be a touch screen display. The display component 6 is electrically connected to the control component 5 and is used for parameter setting input and real-time display of the working status, temperature curve, motion response curve and final freezing point test results of each detection unit.

[0050] like Figure 3 and Figure 4 As shown, this embodiment also provides a crude oil pour point testing system, which includes the crude oil pour point testing device provided in this embodiment.

[0051] Specifically, the crude oil pour point testing system includes a housing 10, an inlet manifold 20, and an outlet manifold 30. Multiple crude oil pour point testing devices are connected in parallel within the housing 10, forming a multi-station parallel structure. In this embodiment, the housing 10 houses three of the aforementioned crude oil pour point testing devices, arranged parallel and spaced apart. The inlet manifold 20 is located near the inlet branch pipes 15 and connects to multiple inlet branch pipes 15. The inlet manifold 20 is also connected to an external oil pipeline, ensuring the incoming oil is under pressure to be smoothly delivered to each inlet branch pipe 15. The outlet manifold 30 is located near the outlet branch pipes 16, collecting the oil discharged from each outlet branch pipe 16 of the housing 1 and returning the collected oil to an external pipeline or collection device. This crude oil pour point testing system can be directly connected to an oil sampling pipeline, occupies a small area, and allows for on-demand discharge of tested oil without subsequent reinjection.

[0052] More specifically, multiple crude oil pour point testing devices can simultaneously or separately test the pour point of the oil sample 100. The following example illustrates this using multiple crude oil pour point testing devices testing the pour point of the oil sample 100 separately. Control component 5 controls the solenoid valves and testing procedures of each testing device according to a preset timing sequence, enabling N testing devices (N≥2) to operate simultaneously but with staggered testing phases. Using this timing control strategy, the pour point detection cycle can be shortened to 1 / N of a single device, significantly increasing the testing frequency. Simultaneously, each testing device can serve as a backup and mutually calibrate. For example, device 1 starts testing at time t0, device 2 starts testing at time t0+Δt, and device 3 starts testing at time t0+2Δt, where Δt is 1 / 3 of the device's testing cycle. The test results of each device are displayed in real time on display component 6, and the average value is output as the final pour point result.

[0053] like Figure 5 As shown, this embodiment also provides a crude oil pour point test method. This crude oil pour point test method can use the crude oil pour point test device or the crude oil pour point test system provided in this embodiment to test the pour point of the oil product 100 to be tested.

[0054] Next, we will take the crude oil pour point test method using the crude oil pour point test device provided in this embodiment to test the pour point of the oil product 100 as an example. The crude oil pour point test method includes: S100. Place the float assembly 2 into the cavity 13 of the housing 1 and seal the cavity 13. S200, Inject the oil to be tested 100 into the cavity 13; S300, temperature control component 3 cools the oil sample 100 to be tested in cavity 13, and excitation output component 4 outputs rotation excitation to housing 1. S400. Determine the pour point of the oil product 100 to be tested based on the response signal of the inertial detection element 22.

[0055] During testing, control component 5 first opens the inlet solenoid valve of the test device to be tested, using pipeline pressure to inject the test oil 100 into chamber 13. After filling, the inlet solenoid valve is closed. Then, the temperature control unit is activated to perform a cooling test according to the set program. After the test is completed, the outlet solenoid valve is opened, and the tested oil is flushed out using pipeline pressure, before the next test is performed.

[0056] When the crude oil pour point test method uses the crude oil pour point test system provided in this embodiment to test the pour point of the oil product 100, it is only necessary to control multiple crude oil pour point test devices through the control component 5. This embodiment will not be described in detail here.

[0057] The crude oil pour point testing device, testing system, and testing method provided in this embodiment can be widely used in: 1. Crude oil pipeline transportation: Real-time online monitoring of changes in the pour point of crude oil in pipelines to guide adjustments to heating temperature and throughput.

[0058] 2. Oil depot storage tank management: Conduct in-situ testing of crude oil at the bottom of the storage tank to prevent tank freezing accidents.

[0059] 3. Refining feed monitoring: Monitor the pour point fluctuations of crude oil entering the plant to provide a basis for adjusting refining processes.

[0060] 4. Evaluation of additive effects: Rapidly evaluate the effects of pour point depressants and flow improvers.

[0061] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A crude oil pour point testing device, characterized in that, include: The housing (1) has a sealed cavity (13) inside, which is configured to hold the oil sample (100) to be tested. The float assembly (2) includes a float body (21), an inertial detection element (22), and a temperature detection element (23). The inertial detection element (22) is integrated inside the float body (21). The float body (21) is placed inside the cavity (13) and floats on the surface of the oil sample (100) to be tested. The inertial detection element (22) can detect the motion response of the float body (21) in the oil sample (100) to be tested. The temperature detection element (23) is connected to the float body (21) and can extend into the oil sample (100) to measure the temperature of the oil sample (100). Temperature adjustment component (3), connected to the housing (1), is capable of adjusting the temperature of the oil sample (100) to be tested inside the cavity (13); The excitation output component (4) is connected to the housing (1) and is used to output rotational excitation to the housing (1).

2. The crude oil pour point testing device according to claim 1, characterized in that, The float assembly (2) also includes an anti-slip rib (24), which is located at the bottom of the float body (21) and can extend into the oil sample (100) to be tested. The temperature detection element (23) is located at the bottom of the anti-slip rib (24).

3. The crude oil pour point testing device according to claim 1, characterized in that, The temperature regulating component (3) includes a temperature regulating element connected to the housing (1) for heating or cooling the oil sample (100) to be tested in the cavity (13).

4. The crude oil pour point testing device according to claim 3, characterized in that, The temperature regulating component (3) also includes a temperature control unit, which is communicatively connected to the temperature regulating element and the temperature detection element (23). The temperature control unit can receive temperature signals from the temperature detection element (23) and can also control the temperature and speed of the temperature regulating element when it is heating or cooling.

5. The crude oil pour point testing device according to claim 1, characterized in that, The excitation output component (4) includes a connecting gear (41) and a driving member (42). The connecting gear (41) is fixed to the housing (1). The output end of the driving member (42) is connected to the connecting gear (41) in a transmission manner. The driving member (42) can drive the connecting gear (41) to drive the housing (1) to rotate back and forth.

6. The crude oil pour point testing apparatus according to any one of claims 1-5, characterized in that, The housing (1) includes a bottom shell (11) and a top cover (12). The top cover (12) is fastened to the top opening of the bottom shell (11) and together with the bottom shell (11) forms a sealed cavity (13). The cavity (13) is filled with protective gas before the oil to be tested (100) is injected.

7. The crude oil pour point testing device according to claim 6, characterized in that, The side wall of the bottom shell (11) is provided with an oil inlet branch pipe (15) communicating with the cavity (13). The bottom of the side wall of the bottom shell (11) opposite to the oil inlet branch pipe (15) or the bottom wall of the bottom shell (11) is provided with an oil outlet branch pipe (16) communicating with the cavity (13). Both the oil inlet branch pipe (15) and the oil outlet branch pipe (16) are equipped with opening and closing valves (17).

8. The crude oil pour point testing apparatus according to any one of claims 1-5, characterized in that, The crude oil pour point testing device further includes a control component (5) and a display component (6). The control component (5) is communicatively connected to the inertial sensor (22), the temperature sensor (23), the temperature regulating component (3), the excitation output component (4), and the display component (6). The control component (5) can receive the response signal from the inertial sensor (22) and the temperature signal from the temperature sensor (23). The control component (5) can also control the heating or cooling of the temperature regulating component (3). The control component (5) can also control the opening and closing of the excitation output component (4) and the motion parameters. The control component (5) can also control the display component (6) to display the response signal, the temperature signal, and the motion parameters.

9. A crude oil pour point testing system, characterized in that, Includes the crude oil pour point testing device as described in any one of claims 1-8, wherein multiple crude oil pour point testing devices are connected in parallel, and the multiple crude oil pour point testing devices are capable of simultaneously or separately performing pour point testing on the oil product (100) to be tested.

10. A method for testing the pour point of crude oil, characterized in that, The pour point test of the oil product (100) is performed using the crude oil pour point testing apparatus as described in any one of claims 1-8, comprising: S100. Place the float assembly (2) into the cavity (13) of the housing (1) and close the cavity (13). S200, Inject the oil to be tested (100) into the cavity (13); S300, control the temperature regulating component (3) to cool down the oil sample (100) to be tested in the cavity (13), and control the excitation output component (4) to output rotation excitation to the housing (1); S400. Determine the pour point of the oil to be tested (100) based on the response signal of the inertial detection device (22).

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