A temperature collection and evaluation device for simulating a wax deposition process of an oil well

Abstract

This invention relates to the field of oilfield production technology, and in particular to a temperature acquisition and evaluation device for simulating the wax deposition process in oil wells. It mainly addresses the problems of large errors in measuring wax deposition and inaccurate detection of the wax-preventing effect of existing wax deposition simulation devices. A back pressure valve (21) is installed at the inlet of the raw oil tank (1). The outlet of the raw oil tank (1) is connected to a power pump (5) via a pipeline (14). A wax deposition simulation cylinder (7) is connected to the pipeline (14) at the outlet of the power pump (5). The outlet of the wax deposition simulation cylinder (7) is connected to a valve group (12) via a pipeline (14), and a temperature sensor (11) is connected to the pipeline (14) at the outlet of the wax deposition simulation cylinder (7). The outlet of the valve group (12) is connected to the back pressure valve (21) via a pipeline (14). This device can simulate wax deposition in oil wells and detect wax removal and prevention tools and technologies, which is of great significance for energy saving and consumption reduction in mechanized wells and for defining the application scope of wax prevention tools and technologies.

Description

Technical Field

[0001] This invention relates to the field of oilfield production technology, specifically to a temperature acquisition and evaluation device for simulating the wax deposition process in oil wells. Background Technology

[0002] Currently, the problem of wax deposition in oil wells is severe, with wax content exceeding 20% ​​in most areas and surpassing 30% in some blocks. Significant manpower and resources are required annually for wax removal and prevention. Oil well wax deposition is mainly caused by internal and external factors. Internal factors primarily refer to the composition of the crude oil (e.g., wax, gum, and asphaltene); external factors refer to factors other than the crude oil composition, mainly including well conditions such as temperature, pressure, gas-oil ratio, deposition time, and flow rate. Other influencing factors include the smoothness and surface properties of the tubing wall, changes in crude oil conditions along the tubing path, and the energy release method of the pump providing power. The wax deposition process in oil wells is complex, with constantly changing conditions. Temperature is one of the most crucial factors throughout the process. The wax precipitation, deposition temperature, and the wax deposition patterns under specific temperature conditions provide guidance for on-site wax removal and prevention techniques. Currently, laboratory wax deposition simulation equipment is mostly miniaturized, using indirect methods to measure wax deposition and study deposition mechanisms. This results in large errors and cannot accurately detect and evaluate wax prevention tools and technologies. Summary of the Invention

[0003] To overcome the shortcomings of existing wax deposition simulation devices, such as large errors in measuring wax deposition and inability to accurately detect the wax-preventing effect of anti-wax tools, this invention provides a temperature acquisition and evaluation device for simulating the wax deposition process in oil wells. This device can simulate wax deposition in oil wells and detect wax removal and anti-wax tools and technologies. It is of great significance for energy conservation and consumption reduction in mechanized wells and for defining the application scope of anti-wax tools and technologies.

[0004] The technical solution of this invention is: a temperature acquisition and evaluation device for simulating the wax deposition process in oil wells, comprising a raw oil tank, a back pressure valve at the inlet of the raw oil tank, a bladder damper connected to the outlet of the raw oil tank via a pipeline, a power pump connected to the outlet of the bladder damper, a diaphragm damper connected to the outlet of the power pump, a wax deposition simulation cylinder connected to the outlet of the diaphragm damper, a thermocouple connected to the wax deposition simulation cylinder with the thermocouple end located inside the wax deposition simulation cylinder; a valve group connected to the outlet of the wax deposition simulation cylinder via a pipeline, and a temperature sensor connected to the pipeline at the outlet of the wax deposition simulation cylinder; and a back pressure valve connected to the outlet of the valve group via a pipeline.

[0005] Furthermore, the inlet end of the wax-forming simulation cylinder is connected to an anti-wax tool, and the inlet end of the anti-wax tool is connected to a pipeline via a metal flexible hose.

[0006] Furthermore, the outlet end of the wax-forming simulation cylinder is connected to a pipeline via a flexible metal hose.

[0007] Furthermore, a pressure sensor is connected to the pipeline at the outlet of the valve assembly.

[0008] Furthermore, the inlet pipeline of the power pump is equipped with a bladder damper and a diaphragm damper.

[0009] Furthermore, a filter is installed on the pipeline at the outlet of the raw oil tank.

[0010] Furthermore, a raw material oil tank heater is provided on the outside of the raw material oil tank.

[0011] Furthermore, a heating belt is provided outside the pipeline, which is used for segmented heating and has several temperature measurement points.

[0012] Furthermore, the bottom of the wax-forming simulation cylinder is connected to the simulation cylinder support, and the angle between the axis of the wax-forming simulation cylinder and the horizontal direction is 0-90°.

[0013] Furthermore, differential pressure sensors are installed on the pipelines at the inlet and outlet ends of the wax simulation cylinder, and the differential pressure sensors are connected to the pressure sensors.

[0014] The present invention has the following beneficial effects:

[0015] I. This device simulates the downhole environment of an oil well and is equipped with wax-containing feedstock. The simulated tubing can be replaced with different sizes according to test requirements, and the simulated tubing can rotate to meet the needs of different well inclination tests. The application of metal hoses allows for the addition of various anti-wax tools to the system for testing and evaluation. For the preparation of the wax-containing feedstock, after testing various schemes, a mixture of paraffin wax and white oil with a weight ratio of 20:80 was selected from the perspective of test safety and the requirements of wax formation simulation tests. Both components are crude oil components, and white oil is a mineral oil, which can better reflect the wax formation characteristics of crude oil while also taking into account safety requirements.

[0016] II. Regarding the operational safety and reliability of the unit, a damper is installed before and after the power pump, and a back pressure valve is installed at the return port of the raw oil storage tank to make the unit safer to operate.

[0017] III. Temperature and Other Parameter Acquisition. Temperature is the main influencing factor for wax deposition. Three types of temperature control are used: heating rods, heating belts, and constant temperature baths. For temperature control, multiple sections of heating belts are wrapped around the pipe for temperature control. The simulated tube is individually temperature-controlled using a constant temperature bath, and thermocouples are used inside the simulated tube to measure the radial temperature change of the wax deposition tube. Differential pressure sensors are added to both ends of the simulated tube to reflect the pressure difference changes caused by the wax deposition thickness. This correspondence allows for the inverse study of the relationship between pressure difference changes and wax deposition thickness. The system is configured with pressure, temperature, and flow control at multiple key points. Data acquisition contributes to the automatic control of the system and is the basis for testing and evaluation.

[0018] IV. The equipment is capable of testing and evaluating wax-prevention tools and technologies. The equipment simulates downhole environments to conduct wax deposition tests. Comparing the amount of wax deposited before and after installing wax-prevention tools allows for the evaluation of the effectiveness of the tools and technologies. Combined with wax performance testing equipment (such as DSC systems, microscopes, and advanced rheometers), the equipment assesses the wax prevention rate macroscopically and the wax crystal distribution and wax properties microscopically. Through comprehensive evaluation, the application effectiveness of various wax removal and prevention technologies is determined, providing guidance for field applications. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the wax deposition simulation cylinder after wax deposition.

[0021] Figure 3 This is a graph showing the relationship between pressure difference changes and temperature and wax thickness changes;

[0022] Figure 4 This is a thermal analysis diagram of an oil sample.

[0023] In the diagram: 1-Raw oil tank, 2-Level gauge, 3-Bladder damper, 4-Diaphragm damper, 5-Power pump, 6-Refrigerant inlet / outlet pipe, 7-Waxing simulation cylinder, 8-Metal hose, 9-Simulation cylinder support, 10-Thermocouple, 11-Temperature sensor, 12-Valve group, 13-Pressure sensor, 14-Pipeline, 15-Connecting flange, 16-Differential pressure sensor, 17-Flow meter, 18-Heating belt, 19-Filter, 20-Raw oil tank heater, 21-Back pressure valve, 22-Waxing prevention tool. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "inner," "outer," "top," and "bottom" are based on the orientations or positional relationships shown in the accompanying drawings. They are intended only to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the components 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 this invention.

[0026] Depend on Figure 1As shown, a temperature acquisition and evaluation device for simulating the wax deposition process in oil wells includes a raw oil tank 1. An external heater 20 is installed on the outside of the raw oil tank 1 to heat the internal oil, thereby testing the wax deposition state at different temperatures. Simultaneously, an agitator connected to a motor is installed inside the raw oil tank 1 to stir the liquid inside, ensuring uniform heating. A level gauge 2 is installed on the raw oil tank 1 to display the liquid level. A back pressure valve 21 is installed at the inlet of the raw oil tank 1, and a power pump 5 is connected to the outlet of the raw oil tank 1 via a pipeline 14. A filter 19 is installed on the pipeline 14 at the outlet of the raw oil tank 1, and the filter 19 can be connected in parallel to the pipeline 14, with the filter 19 being activated as needed. A heating belt 18 is installed outside the pipeline 14, which provides segmented heating and temperature control of the crude oil inside the pipeline. The heating belt 18 has several temperature measurement points for multi-point temperature control.

[0027] The inlet pipeline of the power pump 5 is equipped with a bladder damper 3 and a diaphragm damper 4. Due to the pulse energy of the plunger pump, a "water hammer" effect (referring to the oscillation of fluid flowing through a pipe due to pressure changes on valves and pipe walls) can easily occur in the system, posing a certain safety hazard. Here, the problem is effectively solved by installing a back pressure valve 21 at the inlet of the raw material tank 1 and a damper before and after the power pump 5.

[0028] The wax-forming simulation cylinder 7 is connected to the pipeline 14 at the outlet of the power pump 5, and a flow meter 17 is installed on this pipeline 14. When it is necessary to test the wax-preventing effect of the wax-preventing tool 22, the inlet end of the wax-forming simulation cylinder 7 is connected to the wax-preventing tool 22, and the inlet end of the wax-preventing tool 22 is connected to the pipeline 14 through a metal flexible hose 8; the outlet end of the wax-forming simulation cylinder 7 is also connected to the pipeline 14 through a metal flexible hose 8. The use of a metal flexible hose 8 facilitates the addition of various wax-preventing tools to the system for testing and evaluation.

[0029] The outlet of the wax deposition simulation cylinder 7 is connected to a valve assembly 12 via a pipeline 14. The valve assembly 12 includes a pressure reducing valve, a check valve, and a safety valve. A temperature sensor 11 is connected to the pipeline 14 between the outlet of the wax deposition simulation cylinder 7 and the valve assembly 12. The pipeline 14 at the outlet of the valve assembly 12 is connected to the raw oil storage tank 1, and a pressure sensor 13 is connected to the outlet of the valve assembly 12. Simultaneously, differential pressure sensors 16 are installed on the pipelines at the inlet and outlet ends of the wax deposition simulation cylinder 7 to measure the pressure difference caused by the wax deposition thickness. This correspondence allows for the reverse study of the relationship between pressure difference changes and wax deposition thickness.

[0030] The bottom of the wax deposition simulation cylinder 7 is connected to the simulation cylinder support 9, which is placed on the ground. A pivot is provided between the wax deposition simulation cylinder 7 and the simulation cylinder support 9, allowing the wax deposition simulation cylinder 7 to rotate and be fixed at any angle within the range of 0-90° on the simulation cylinder support 9 to simulate wax deposition conditions at different well inclinations. To accommodate the connection between the wax deposition simulation cylinder 7 and pipeline 14 at different angles, at least four connecting flanges 15 are pre-installed on the pipeline for connection at different angles. A thermocouple 10 is connected to the wax deposition simulation cylinder 7, with its end extending into the center of the cylinder. The radial position of the thermocouple 10 is adjustable, allowing for the measurement of the temperature at different locations inside the cylinder. A constant temperature bath is provided outside the wax deposition simulation cylinder 7, with refrigerant inlet and outlet pipes 6 connected to it. The temperature of the crude oil inside the wax deposition simulation cylinder 7 is adjusted by the refrigerant in the constant temperature bath, thereby simulating wax deposition conditions at different temperatures.

[0031] This temperature acquisition and evaluation device simulating the wax deposition process in oil wells also includes a data acquisition and control system. Data acquisition utilizes a PCI bus data acquisition board to monitor changes in flow rate, pressure, and temperature in real time. The pressure data acquisition frequency is no less than 100 data points / second, enabling real-time tracking of pressure changes. All main operations and controls are implemented on a computer and include interlocking alarm protection functions. Dedicated analysis software is used, enabling functions such as I / O processing, data acquisition, pressure control, and temperature control. The pressure signal acquisition frequency is 100Hz, acquiring 100 data points per second. The computer has system monitoring, data management, and system configuration functions. A display screen is mounted on the control panel, and the signal can be connected to the computer control system for screen display.

[0032] The following describes the operation steps of the temperature acquisition and evaluation device for simulating the wax deposition process in an oil well, using a mixture of white oil and paraffin (mass ratio 80:20) as an example. Since both white oil and paraffin are components of crude oil, they can objectively reflect the wax deposition characteristics of crude oil. The device is evaluated using a target comparison system with tubing, an electric pulse wax inhibitor, an acoustic wax inhibitor, and a strong magnetic wax inhibitor.

[0033] Step 1: Add raw materials to raw material tank 1.

[0034] Close the outlet and reflux valves of raw material oil tank 1 (150L capacity). Add the experimental white oil and paraffin wax to the raw material oil tank according to a certain weight ratio (white oil is added through the inlet using an electric hydraulic pump, and paraffin wax is added by cutting it into small pieces and adding it from the top port). Turn on the raw material oil tank heater 20 and the stirrer, set the temperature to melt the wax (e.g., 50℃), and set the stirring motor frequency to 20Hz. Observe that the reading of the raw material oil tank level gauge does not change for a long time. At this time, the paraffin wax has completely melted into the white oil. After opening the outlet and reflux valves, the next step can be carried out.

[0035] Step 2, Raw material recycling (including wax melting and recycling operations).

[0036] Close the outlet valve of crude oil tank 1, and open all pipeline switches between the outlet of the raw material tank and the return port of the raw material tank (fully open the return valve and back pressure valve). Turn on the heating belts 18 at each point, set the heating temperature to 40℃, start the water chiller, and set the outer wall temperature of the anti-wax device to 40℃ as well. After the temperature at each point stabilizes, open the outlet valve of the raw material tank, start the main motor pump, set the initial frequency to 20Hz, and the raw material begins to circulate in the system.

[0037] Step 3: Replenish fluids.

[0038] If the liquid level in raw material oil tank 1 is too low, close the outlet valve of the raw material oil tank and the main motor pump. Without any other operation, add supplementary raw material again. Observe that the reading of the liquid level gauge 2 in the raw material oil tank no longer changes. At this time, the paraffin has completely melted into the white oil, and the liquid level is appropriate. The following operations can then be performed.

[0039] Step 4: Parameter setting before the experiment begins.

[0040] Open the outlet valve of the raw material tank and the main motor pump, and set the frequency (e.g., 20Hz). After circulating for a period of time, adjust the raw material temperature in the raw material tank, the raw material temperature in the simulated tube (e.g., 40℃), and the outer wall temperature of the simulated tube to reach the required set temperature parameters (e.g., 38℃). Then, start the system back pressure (back pressure valve, e.g., 3.0MPa) and set the flow rate (e.g., 1m³ / h). After the back pressure is applied, observe that the liquid level in the raw material tank drops to a certain position and then stops dropping. Then, proceed with the following operations.

[0041] Step 5: Shutdown test.

[0042] Set the chiller temperature (e.g., 26℃) and stop all heating (control the opening and closing according to the temperature parameters). After testing according to the time parameters (e.g., 30 minutes), stop the main motor pump. Keep all previously set temperatures unchanged. Loosen the back pressure valve to release pressure to a slight positive pressure. Open the air valve outlet at the top of the anti-wax tool and discharge material at low liquid levels before and after the anti-wax tool. Disassemble the simulated tube and weigh it or measure the amount of wax deposited using other methods. The experiment is now complete.

[0043] Step 6: Change the test parameters and continue the test, repeating steps 4 and 5.

[0044] Step 7: After the experiment, close the inlet and outlet valves of the raw material oil tank, turn off all heating, turn off the stirring motor, and turn off the software and power switch.

[0045] The embodiments of the present invention employ the above-described experimental process to perform the following experiments:

[0046] I. Experiment on the relationship between differential pressure change of differential pressure sensor and wax thickness.

[0047] Test conditions:

[0048] 1) Pressure: Atmospheric pressure;

[0049] 2) Flow rate: 0.8m 3 / h;

[0050] 3) Evaluation of the time required for the temperature of the simulation cylinder to drop from 40℃ to 29℃ and the wax deposition effect;

[0051] 4) Time: More than 3 hours (to ensure the integrity of the reference test data).

[0052] Conclusion: The experiment lasted nearly 4 hours, and a very thick layer of wax was formed at the end. Figure 2 From the start of the set cooling process until the pressure differential stabilizes and the wax deposition thickness reaches its peak, the time taken is approximately one hour. (See attached image) Figure 3 .

[0053] Under conditions where the temperature is higher than that of this test, the test time can be set to be greater than or equal to 1 hour;

[0054] Under conditions lower than the temperature used in this test, the test duration was less than 1 hour.

[0055] II. Differential Scanning Calorimetry (DSC) Analysis.

[0056] Thermal analysis of simulated oil samples was performed using differential scanning calorimetry (DSC), such as... Figure 4 The wax precipitation of the oil sample began at 55.2℃, with the fastest precipitation occurring around 40℃. Through experimental simulation, the wax precipitation temperature was found to be higher than the wax deposition temperature, which was approximately 37.2℃. The specific parameters for this experiment, determined based on the wax precipitation and deposition temperatures, are shown in Table 1.

[0057] Radial temperature of the wax-coated tube was obtained. Radial temperature data was collected by adjusting the radial extension and retraction lengths of the upper and lower thermocouples in the wax-coated tube for later experimental analysis. In this experiment, the temperature difference between the center of the wax-coated tube and the inner wall of the tube was 3℃.

[0058] Table 1. Parameters for Wax Deposition Test of Testing Equipment

[0059] parameter Parameter value Pressure MPa 3±0.05 <![CDATA[Flow rate m 3 / h]]> 1.0±0.05 test time min 30±0.1 Simulated initial temperature of the tube (center) in °C 40±0.2 Simulated initial temperature of the outer wall of the tube (°C) 38±0.2 Refrigeration unit output temperature (temperature of wax deposition during refrigeration) in °C 29±0.2

[0060] Table 2 shows a comparison of the wax-preventing effects of wax preventers:

[0061] Table 2 Comparison of wax-preventing effects of wax inhibitors

[0062]

[0063] Experimental results:

[0064] (1) The wax-preventing effects of various wax-preventing devices under the test parameters are as follows, as shown in Table 2: No wax-preventing device < Electric pulse wax-preventing device < Acoustic wax-preventing device < Strong magnetic wax-preventing device;

[0065] (2) Factors influencing wax deposition patterns:

[0066] Temperature patterns of wax precipitation and wax formation: wax liquid first precipitates wax crystals and gradually cross-links, and then deposits wax on the pipe wall. The temperature at which wax precipitation begins is 55.2℃, and the fastest temperature is about 40℃, while the temperature at which wax deposition and formation are obvious is 37.2℃.

[0067] (3) Without wax inhibitor test, under the same parameters, the influence of travel distance and temperature:

[0068] Measurements were taken of the temperature control units at the top and bottom of the simulated tube. The wax solution loses heat over the travel distance, resulting in differences in wax formation. At a certain stage, the temperature rise causes the wax to change from loose to dense. Further heating will cause the wax to melt again. Differential pressure sensor tests show that the differential pressure increases with the wax thickness. After the wax thickness reaches a certain level, the differential pressure tends to stabilize.

[0069] This invention simulates the downhole environment of an oil well and uses wax-containing feedstock. In terms of hardware, a plunger pump is used as the power source. The simulated tubing can be replaced with different sizes according to experimental requirements and can rotate to meet different well inclination test needs. The application of metal hoses allows for the addition of various anti-wax tools for testing and evaluation. A damper is installed before and after the power pump, and a back pressure valve is installed at the return port of the feedstock storage tank to enhance the safety of the device's operation. Temperature control is achieved through a heater outside the feedstock storage tank, a constant temperature bath outside the wax-congealing simulation cylinder, and a heating belt outside the pipeline. Thermocouples are used inside the simulated tubing to measure the radial temperature change of the wax-congealing tube. Differential pressure sensors are installed at both ends of the simulated tubing to reflect the pressure difference caused by the wax thickness. This correspondence allows for the inverse study of the relationship between pressure difference change and wax thickness. The system is also equipped with pressure, temperature, and flow control at multiple key points. Data acquisition facilitates automatic system control and forms the basis for testing and evaluation. This device simulates the downhole environment to conduct wax deposition tests. By comparing the amount of wax deposition before and after installing anti-wax tools, the effectiveness of the anti-wax tools and technologies can be evaluated. Combined with wax performance testing equipment (such as DSC systems, microscopes, and advanced rheometers), the device can detect the wax deposition rate on a macroscopic level and detect the wax crystal distribution and wax properties on a microscopic level. Through comprehensive evaluation, the application effect of various wax removal and prevention technologies can be determined, providing guidance for field applications.

[0070] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A temperature acquisition and evaluation device for simulating the wax deposition process in oil wells, comprising a raw material oil tank (1), characterized in that: A back pressure valve (21) is provided at the inlet of the raw oil tank (1). The outlet of the raw oil tank (1) is connected to a bladder damper (3) via a pipeline (14). The outlet of the bladder damper (3) is connected to a power pump (5). The outlet of the power pump (5) is connected to a diaphragm damper (4). The outlet of the diaphragm damper (4) is connected to a wax deposition simulation cylinder (7). A thermocouple (10) is connected to the wax deposition simulation cylinder (7), and the end of the thermocouple (10) is located inside the wax deposition simulation cylinder (7). The outlet of the wax deposition simulation cylinder (7) is connected to a valve group (12) via a pipeline (14). A temperature sensor (11) is connected to the pipeline (14) at the outlet of the wax deposition simulation cylinder (7). The outlet of the valve group (12) is connected to the back pressure valve (21) via a pipeline (14).

2. The temperature acquisition and evaluation device for simulating the wax deposition process in oil wells according to claim 1, characterized in that: The wax-forming simulation cylinder (7) is connected to an anti-wax tool (22) at its inlet end, and the anti-wax tool (22) is connected to a pipeline (14) via a metal hose (8) at its inlet end.

3. The temperature acquisition and evaluation device for simulating the wax deposition process in oil wells according to claim 2, characterized in that: The outlet end of the wax simulation cylinder (7) is connected to the pipeline (14) via a metal flexible hose (8).

4. The temperature acquisition and evaluation device for simulating the wax deposition process in oil wells according to claim 1 or 2, characterized in that: A pressure sensor (13) is connected to the pipeline (14) at the outlet of the valve group (12).

5. The temperature acquisition and evaluation device for simulating the wax deposition process in oil wells according to claim 1 or 2, characterized in that: The power pump (5) is equipped with a bladder damper (3) and a diaphragm damper (4) on its inlet pipeline.

6. The temperature acquisition and evaluation device for simulating the wax deposition process in oil wells according to claim 1 or 2, characterized in that: A filter (19) is installed on the pipeline (14) at the outlet of the raw oil tank (1).

7. The temperature acquisition and evaluation device for simulating the wax deposition process in oil wells according to claim 6, characterized in that: The raw material oil tank (1) is equipped with a raw material oil tank heater (20) on its exterior.

8. The temperature acquisition and evaluation device for simulating the wax deposition process in oil wells according to claim 1 or 2, characterized in that: The pipeline (14) is provided with a heating belt (18) outside. The heating belt (18) is heated in sections, and there are several temperature measurement points on the heating belt (18).

9. The temperature acquisition and evaluation device for simulating the wax deposition process in oil wells according to claim 1 or 2, characterized in that: The bottom of the wax-forming simulation cylinder (7) is connected to the simulation cylinder support (9), and the angle between the axis of the wax-forming simulation cylinder (7) and the horizontal direction is 0-90°.

10. The temperature acquisition and evaluation device for simulating the wax deposition process in oil wells according to claim 9, characterized in that: Differential pressure sensors (16) are installed on the pipelines at the inlet and outlet ends of the wax simulation cylinder (7), and the differential pressure sensors (16) are connected to the pressure sensors (13).

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