High-temperature and high-pressure rotary shale oil thermal cracking core clamping experiment device and using method thereof

Abstract

The invention discloses a high-temperature and high-pressure rotary shale oil thermal cracking rock core clamping experiment device and a using method. The device comprises a heat preservation cylinder, a rock core clamping device, a rotary driving assembly and a heating assembly; the rock core clamping device is arranged in the heat preservation cylinder; the heating assembly is arranged between the rock core clamping device and the heat preservation cylinder; the rotary driving assembly is arranged above the heat preservation cylinder; and an output shaft of the rotary driving assembly is connected with the rock core clamping device. By optimizing the material and the structure of the clamping body, arranging the rotary heating device and adding the gas injection pipeline, the shale oil thermal cracking experiment can be carried out in an extreme high-temperature and high-pressure environment, and a reliable basis is provided for shale oil research.

Description

Technical Field

[0001] The present invention relates to the technical field of shale oil experimental devices, and specifically to a high-temperature and high-pressure rotating shale oil pyrolysis core holder experimental device and its usage method. Background Art

[0002] In fields such as geological exploration and oil development, the analysis of cores is one of the important means to obtain underground geological information. By collecting core samples from underground rocks, core flow experiments can be carried out for analysis in aspects such as physics, chemistry, and petrology to understand key information such as the properties of underground formations, the reserves and distribution of oil and gas resources.

[0003] Traditional core holder experimental devices have a series of problems in experiments. First, traditional core holder experimental devices use ordinary heaters for heating, with a slow and uneven heating rate. Since the pyrolysis of shale oil requires extremely high temperatures, if a traditional holder experimental device is used in the pyrolysis experiment of shale oil, the heating device of the ordinary holder experimental device has a low heating rate and cannot provide a high temperature. Even if a very high temperature can be reached, the high-temperature environment after heating will cause thermal expansion deformation and thermal fatigue of the holder sleeve, reducing the mechanical strength and service life of the holder, causing the holder body to lose its original clamping force, and at the same time making it impossible to stably fix the core sample. Secondly, due to the small porosity of shale cores, a large amount of fluid will accumulate in the shale pores after the experiment in ordinary holder experimental devices and cannot be displaced, thus affecting the accuracy of the experiment. Therefore, these problems existing in current ordinary holder experimental devices seriously affect the accuracy and reliability of core collection and analysis in high-temperature environments.

[0004] Therefore, a pyrolysis core holder for shale oil that can heat evenly, withstand high temperature and pressure, and efficiently displace shale oil is needed to solve the problems of traditional holders in high-temperature environments. This new type of shale oil pyrolysis core holder should have the following characteristics: First, the materials of this experimental device need to have excellent high-temperature resistance and be able to maintain a stable clamping force in a high-temperature environment. Second, the heating device of this experimental device can heat quickly and evenly. Finally, this experimental device can efficiently displace the remaining oil and gas in the core.

[0005] Publication (Announcement) Number: CN116498283A discloses an oil shale heating and pyrolysis simulation device. It includes a reaction kettle with a chamber formed inside for receiving a core containing optical fibers, and a first control valve and a second control valve are respectively arranged on the outer periphery of the reaction kettle and communicated with the chamber. A monitoring unit connected to the optical fiber. A storage unit communicated with the second control valve. An air injection unit with one end communicated with the storage unit and the other end communicated with the first control valve. Among them, the reaction kettle is configured to be able to pyrolyze the core containing optical fibers, and the monitoring unit is configured to be able to monitor the state of the optical fiber in real time, and then obtain the state of the core. The invention can perform pyrolysis tests on oil shale under various heating modes, thereby enhancing the accuracy and reliability of the comparison of in-situ conversion mining efficiency simulation results under different working conditions.

[0006] This prior art has the technical problem of uneven heating of the core.

[0007] Publication (Announcement) Number: CN113218989A discloses a hydrocarbon source rock thermal simulation hydrocarbon generation and expulsion experiment system and method, which can realize the pyrolysis of hydrocarbon source rock samples under high-pressure conditions (confining pressure + axial pressure), using high-temperature and high-pressure gas as the heating medium, and simultaneously using tracking heating tiles to heat and pyrolyze the hydrocarbon source rock. This experimental system can measure and record the temperature at each position of the sample in real time, record data such as the temperature, pressure, flow rate, and total amount of the fluid at the inlet and outlet of the holder, and collect and measure the produced oil and gas separately in a timely manner. In addition, this experimental system can measure the core permeability. There are several heating tiles in the core holder, and each heating tile is provided with several temperature sensors to monitor the surface temperature of the core.

[0008] This prior art has the technical problem of uneven heating of the core.

[0009] Publication (Announcement) Number: CN112326716A discloses an oil shale pyrolysis simulation test device and test system and its method. The oil shale pyrolysis simulation test device includes: a reaction tank upper cover and a reaction tank body, and a flue gas inlet is respectively arranged on the reaction tank upper cover; a reaction zone, an oil and gas outflow interlayer, and an oil and gas outlet are arranged in the reaction tank body; the flue gas inlet is connected to the upper part of the reaction zone through a hot air pipe; an oil and gas outflow interlayer is arranged between the reaction zone and the inside of the reaction tank body; the oil and gas outlet is arranged at the bottom of the reaction tank body. The oil shale pyrolysis simulation test system is connected in series in turn by an air compressor, a gas control cabinet, a combustion device, an oil shale pyrolysis simulation test reaction device, a cooling device, and a recovery device; through this invention, physical simulation tests of oil shale thermal pyrolysis under different temperatures, pressures, flow rates, and different carrier gas components are carried out, the heating and pyrolysis effect of oil shale is monitored, and the optimal process parameters are obtained by combining the yield, components, and physical and chemical properties analysis of the oil and gas products.

[0010] This prior art has the technical problem of uneven heating of the core.

[0011] In summary, the technical solutions, the technical problems to be solved, and the beneficial effects of the above-disclosed technologies are all different from those of the present invention. Regarding more technical features, the technical problems to be solved, and the beneficial effects of the present invention, there is no technical inspiration in the above-disclosed technical documents. Summary of the Invention

[0012] In view of the above-mentioned defects existing in the prior art, the object of the present invention is to provide a high-temperature and high-pressure rotary shale oil pyrolysis core clamping experimental device and its usage method, to solve the problems existing in the traditional clamping experimental device in the shale oil pyrolysis experiment, such as slow heating rate, low heating temperature, uneven heating, deformation, failure and damage of the clamp, and low accuracy of experimental oil displacement, etc., and to ensure the reliable clamping and high-quality analysis of the experimental device.

[0013] To achieve the above object, the present invention adopts the following technical solutions:

[0014] A high-temperature and high-pressure rotary shale oil pyrolysis core clamping experimental device, comprising a heat preservation cylinder, a core clamping device, a rotary drive assembly, and a heating assembly; the core clamping device is arranged inside the heat preservation cylinder; the heating assembly is arranged between the core clamping device and the heat preservation cylinder; the rotary drive assembly is arranged above the heat preservation cylinder; the output shaft of the rotary drive assembly is connected to the core clamping device.

[0015] Further, the core clamping device includes a sleeve, and a first detachable clamp cover plate is arranged at the upper end of the sleeve, and a second detachable clamp cover plate is arranged at the lower end of the sleeve.

[0016] Further, the first detachable clamp cover plate includes a first cover plate and a first clamping plate, and the first cover plate is arranged above the first clamping plate;

[0017] Specifically, the first cover plate and the first clamping plate are connected together by a connecting rod, the connecting rod is arranged on the axis of the first cover plate and the first clamping plate, and passes through the first cover plate;

[0018] Specifically, a liquid injection pipeline and a gas injection pipeline are further arranged between the first cover plate and the first clamping plate, and the liquid injection pipeline and the gas injection pipeline communicate the upper part of the first cover plate with the lower part of the first clamping plate;

[0019] Specifically, the first cover plate is arranged at the upper end of the sleeve, and the first clamping plate is inserted into the sleeve.

[0020] Further, the second detachable clamp cover plate includes a second cover plate and a second clamping plate, and the second cover plate is arranged below the second clamping plate;

[0021] Specifically, the second cover plate and the second clamping plate are connected by a fixing rod, the fixing rod is arranged on the axis of the second cover plate and the second clamping plate, and passes through the second cover plate;

[0022] Specifically, a liquid outlet pipe is further arranged between the second cover plate and the second clamping plate, and the liquid outlet pipe communicates the lower part of the second cover plate with the upper part of the second clamping plate;

[0023] Specifically, the second cover plate is arranged at the lower end of the sleeve, and the second clamping plate is inserted into the sleeve.

[0024] Further, the first clamping plate and the second clamping plate are respectively sealed with the sleeve.

[0025] Further, the distances between the gas injection pipe and the liquid outlet pipe and the axis of the sleeve are less than the radius of the core model, and the distance between the liquid injection pipe and the axis of the sleeve is greater than the radius of the core model.

[0026] Further, a first detachable cover plate is arranged at the upper end of the heat preservation cylinder, and a second detachable cover plate is arranged at the lower end.

[0027] Further, a transmission through hole is arranged at the center of the first detachable cover plate, a support rod is arranged at the center of the upper end face of the second detachable cover plate, and the fixing rod is connected with the support rod through a rotary joint.

[0028] Further, the rotary drive assembly includes a motor, and the output shaft of the motor passes through the transmission through hole and is fixedly connected with the connecting rod, or the connecting rod passes through the transmission through hole and is fixedly connected with the output shaft of the motor.

[0029] Further, the heating assembly is at least two heating rods.

[0030] Further, the total power of the heating assembly is greater than 2KW.

[0031] In an embodiment of the present invention, the materials of the sleeve, the first clamping plate, and the second clamping plate are HK40 alloy.

[0032] In order to achieve the above object, the present invention adopts the following technical solutions:

[0033] A use method of a high-temperature and high-pressure rotary shale oil pyrolysis core clamping experimental device includes the following steps,

[0034] S1. Assemble the device, install the second detachable clamping device cover plate at the lower end of the sleeve, connect the support rod of the second detachable cover plate and the fixing rod of the second detachable clamping device cover plate through a rotary connecting piece, and install the second detachable cover plate at the bottom of the heat preservation cylinder;

[0035] Place the core model into the sleeve, install the first detachable gripper cover plate at the upper end of the sleeve, and use the first clamping plate to clamp the core model tightly; install the first detachable cover plate at the upper end of the heat preservation cylinder;

[0036] Insert the output shaft of the motor into the transmission hole and insert it onto the fixed connecting piece at the upper end of the connecting rod, or let the connecting rod pass through the transmission hole, and use the fixed connecting piece to fixedly connect the output shaft of the motor and the connecting rod.

[0037] S2. Start the heating component to heat the core clamping device; turn on the motor to rotate the clamping device to ensure uniform heating, and stop heating when the temperature reaches the experimental temperature;

[0038] S3. Open the first detachable cover plate, open the liquid injection pipeline, use a pressure pump to inject oil into the liquid storage bin, continuously pressurize the experimental device, close the pressure pump and stop injecting oil when the pressure reaches the experimental pressure, and close the gas injection pipeline;

[0039] S4. Install the first detachable cover plate, reopen the temperature heating component, ensure that the temperature is constant at the experimental temperature and the pressure is constant at the experimental pressure, and continue for the required experimental time to fully react the thermal cracking of shale oil;

[0040] S5. After reaching the required experimental time, the thermal cracking reaction of shale oil is sufficient. Turn off the heating device, let the high-temperature and high-pressure rotating shale oil thermal cracking core clamping experimental device cool naturally. When the temperature drops to room temperature, open the gas injection pipeline, inject gas, and at the same time open the liquid outlet pipeline to collect the experimental products for analysis.

[0041] The present invention has the following beneficial effects compared with the prior art:

[0042] The high-temperature and high-pressure rotating shale oil thermal cracking core clamping experimental device of the present invention optimizes the material and structure of the clamping body, is equipped with a rotating heating device, and adds a gas injection pipeline, so as to ensure that the thermal cracking experiment of shale oil can be carried out in an extremely high-temperature and high-pressure environment, providing a reliable basis for the research of shale oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic structural diagram of a high-temperature and high-pressure rotating shale oil thermal cracking core clamping experimental device of the present invention;

[0044] In the figure: 1. Motor; 2. Output shaft; 3. First detachable cover plate; 4. Gas injection pipeline; 5. First heating rod; 6. Heat preservation cylinder; 7. First sleeve; 8. Liquid injection pipeline; 9. Liquid storage bin; 10. Second heating rod; 11. First detachable gripper cover plate; 12. Second detachable gripper cover plate; 13. Liquid outlet pipeline; 14. Core model; 15. Second detachable cover plate. DETAILED DESCRIPTION OF THE INVENTION

[0045] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0046] Embodiment 1:

[0047] Please refer to Figure 1 , a high-temperature and high-pressure rotary shale oil pyrolysis core clamping experimental device provided by the present invention includes a heat preservation cylinder 6, a core clamping device, a rotary drive assembly, and a heating assembly;

[0048] The core clamping device is arranged in the heat preservation cylinder 6, the heating assembly is arranged between the core clamping device and the heat preservation cylinder 6, and the rotary drive assembly is arranged above the heat preservation cylinder 6 for driving the core clamping device to rotate in the heat preservation cylinder 6.

[0049] The core clamping device includes a sleeve 7, a first detachable clamp cover plate 11 is arranged at the upper end of the sleeve 7, and a second detachable clamp cover plate 12 is arranged at the lower end;

[0050] The first detachable clamp cover plate 11 includes a first cover plate and a first clamping plate. The first cover plate is arranged above the first clamping plate. The first cover plate and the first clamping plate are connected together by a connecting rod. The connecting rod is arranged on the axis of the first cover plate and the first clamping plate and passes through the first cover plate. A liquid injection pipeline 8 and a gas injection pipeline 4 are also arranged between the first cover plate and the first clamping plate. The liquid injection pipeline 8 and the gas injection pipeline 4 communicate the upper part above the first cover plate with the lower part below the first clamping plate; the first cover plate is arranged at the upper end of the sleeve 7, and the first clamping plate is inserted into the sleeve 7;

[0051] The second detachable clamp cover plate 12 includes a second cover plate and a second clamping plate. The second cover plate is arranged below the second clamping plate. The second cover plate and the second clamping plate are connected by a fixing rod. The fixing rod is arranged on the axis of the second cover plate and the second clamping plate and passes through the second cover plate. A liquid outlet pipeline 13 is also arranged between the second cover plate and the second clamping plate. The liquid outlet pipeline 13 communicates the lower part below the second cover plate with the upper part above the second clamping plate; the second cover plate is arranged at the lower end of the sleeve 7, and the second clamping plate is inserted into the sleeve 7;

[0052] The first clamping plate and the second clamping plate are respectively sealed with the sleeve 7;

[0053] The distances from the gas injection pipeline 4 and the liquid outlet pipeline 13 to the axis of the sleeve 7 are less than the radius of the core model 14, and the distance from the liquid injection pipeline 8 to the axis of the sleeve 7 is greater than the radius of the core model 14.

[0054] A first detachable cover plate 3 is provided at the upper end of the heat preservation cylinder 6, and a second detachable cover plate 15 is provided at the lower end;

[0055] A transmission through hole is provided at the center of the first detachable cover plate 3, and a support rod is provided at the center of the upper end surface of the second detachable cover plate 15. The fixed rod and the support rod are connected through a rotary joint.

[0056] The rotary drive assembly includes a motor 1. The output shaft 2 of the motor 1 passes through the transmission through hole and is fixedly connected to the connecting rod. The connecting rod passes through the transmission through hole and is fixedly connected to the output shaft 2 of the motor 1, so that the motor 1 can drive the core clamping device to rotate.

[0057] The heating assembly is at least two heating rods. The total power of the heating assembly is greater than 2KW, and the experimental device is heated to a high temperature of 600°C. During heating, the entire core clamping device is rotated and heated by rotating the transmission shaft through the motor 1 to ensure uniform heating and make the thermal cracking of shale oil more sufficient. The heat preservation cylinder 6 outside the heating rod can effectively prevent the temperature from decreasing.

[0058] Example 2:

[0059] Specifically, based on Example 1, the usage method of the device is as follows:

[0060] S1. Assemble the device. Install the second detachable holder cover plate 12 at the lower end of the sleeve 7. Connect the support rod of the second detachable cover plate 15 and the fixed rod of the second detachable holder cover plate 12 through a rotary connector. Install the second detachable cover plate 15 at the bottom of the heat preservation cylinder 6. Place the core model 14 into the sleeve 7. Install the first detachable holder cover plate 11 at the upper end of the sleeve 7 so that the first clamping plate clamps the core model 14 tightly. Install the first detachable cover plate 3 at the upper end of the heat preservation cylinder 6. Insert the output shaft of the motor 1 into the transmission hole and insert it onto the fixed connector at the upper end of the connecting rod, or the connecting rod passes through the transmission hole, and use the fixed connector to fixedly connect the output shaft of the motor 1 and the connecting rod;

[0061] S2. Start the heating assembly to heat the core clamping device. Turn on the motor 1 to rotate the clamping device to ensure uniform heating. Stop heating when the temperature reaches 600°C;

[0062] S3. Open the first detachable cover plate 3, open the liquid injection pipeline 8, use a pressure pump to inject oil into the liquid storage bin 9, continuously pressurize the experimental device. When the pressure reaches 70 Mpa, turn off the pressure pump, stop injecting oil, and close the gas injection pipeline;

[0063] S4. Install the first detachable cover plate 3, reopen the temperature heating component, ensure that the temperature is constantly at 600 °C and the pressure is constantly at 70 Mpa for two hours to fully react the thermal cracking of shale oil.

[0064] S5. After two hours, when the thermal cracking reaction of shale oil is sufficient, turn off the heating device, let the high-temperature and high-pressure rotating shale oil thermal cracking core clamping experimental device cool naturally. When the temperature drops to room temperature, open the gas injection pipeline 4, inject gas, and at the same time open the liquid outlet pipeline 14 to collect the experimental products for analysis.

[0065] When in use, protection should be taken to avoid scalding.

[0066] It should be noted that the temperature sensor and the pressure sensor are both prior arts, and their usage methods and arrangement manners are also prior arts, so they are not drawn in the figure, and those skilled in the art are clear about this.

[0067] Example 3:

[0068] Based on Example 1, in order to enable the clamping device to withstand higher temperature and pressure, the sleeve of the clamping device is improved. The traditional sleeve device uses rubber material, which will undergo plastic deformation under high temperature and high pressure and lose its due clamping effect.

[0069] Now replace the materials of the first clamping plate, the second clamping plate, and the sleeve 7 with HK40 alloy, so that it can withstand high temperature and high pressure, ensure no deformation under high temperature and high pressure, and achieve the clamping effect under high temperature and high pressure. This material can withstand a high temperature of 1000 °C, and its chemical composition is calculated by weight percentage: C, 0.35 - 0.45, Si ≤ 1.75, Mn ≤ 1.50, S ≤ 0.040, P ≤ 0.040, Cr, 23.00 - 27.00, Ni, 19.00 - 22.00, Mo ≤ 0.50.

[0070] Preferably, the heating component is provided with two heating rods, namely the first heating rod 5 and the second heating rod 10.

[0071] In this application, all the components themselves that are not elaborated and the connection manners of the components in this application belong to the well-known technologies in the technical field. They can be directly applied and will not be elaborated further.

[0072] In the present invention, the term "a plurality of" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "coupled" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0074] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-temperature and high-pressure rotating shale oil pyrolysis core-holding experimental device, including a heat preservation cylinder, characterized in that, It also includes a core clamping device, a rotary drive assembly, and a heating assembly; The core clamping device is arranged inside the heat preservation cylinder; the heating assembly is arranged between the core clamping device and the heat preservation cylinder; the rotary drive assembly is arranged above the heat preservation cylinder; The output shaft of the rotary drive assembly is connected to the core clamping device.

2. The high-temperature and high-pressure rotary shale oil pyrolysis core clamping experimental device according to claim 1, wherein, The core clamping device includes a sleeve, a first detachable clamp cover is arranged at the upper end of the sleeve, and a second detachable clamp cover is arranged at the lower end of the sleeve.

3. The high-temperature and high-pressure rotary shale oil thermal cracking core clamping experimental device according to claim 2, wherein The first detachable clamp cover includes a first cover plate and a first clamping plate, and the first cover plate is arranged above the first clamping plate; The first cover plate and the first clamping plate are connected together by a connecting rod, the connecting rod is arranged on the axis of the first cover plate and the first clamping plate, and passes through the first cover plate; A liquid injection pipeline and a gas injection pipeline are also arranged between the first cover plate and the first clamping plate, and the liquid injection pipeline and the gas injection pipeline communicate the upper part above the first cover plate with the lower part below the first clamping plate; The first cover plate is arranged at the upper end of the sleeve, and the first clamping plate is inserted into the sleeve.

4. The high-temperature and high-pressure rotating shale oil pyrolysis core-holding experimental device according to claim 3, wherein The second detachable clamp cover includes a second cover plate and a second clamping plate, and the second cover plate is arranged below the second clamping plate; The second cover plate and the second clamping plate are connected by a fixing rod, the fixing rod is arranged on the axis of the second cover plate and the second clamping plate, and passes through the second cover plate; A liquid outlet pipeline is also arranged between the second cover plate and the second clamping plate, and the liquid outlet pipeline communicates the lower part below the second cover plate with the upper part above the second clamping plate; The second cover plate is arranged at the lower end of the sleeve, and the second clamping plate is inserted into the sleeve.

5. The high-temperature and high-pressure rotating shale oil pyrolysis core clamping experimental device according to claim 4, characterized in that, The first clamping plate and the second clamping plate are respectively sealed with the sleeve.

6. The high-temperature and high-pressure rotating shale oil thermal cracking core clamping experimental device according to claim 4, characterized in that, The distances between the gas injection pipeline and the liquid outlet pipeline and the axis of the sleeve are less than the radius of the core model, and the distance between the liquid injection pipeline and the axis of the sleeve is greater than the radius of the core model.

7. The high-temperature and high-pressure rotary shale oil pyrolysis core-holding experimental device according to claim 4, wherein, A first detachable cover is arranged at the upper end of the heat preservation cylinder, and a second detachable cover is arranged at the lower end of the heat preservation cylinder.

8. A high-temperature and high-pressure rotary shale oil thermal cracking core clamping experimental device according to claim 7, characterized in that, A transmission through hole is arranged at the center of the first detachable cover, a support rod is arranged at the center of the upper end surface of the second detachable cover, and the fixing rod is connected to the support rod through a rotary joint.

9. The high-temperature and high-pressure rotating shale oil thermal cracking core clamping experimental device according to claim 8, wherein, The rotary drive assembly includes a motor, the output shaft of the motor passes through the transmission through hole and is fixedly connected to the connecting rod, or the connecting rod passes through the transmission through hole and is fixedly connected to the output shaft of the motor.

10. A high-temperature and high-pressure rotating shale oil thermal cracking core clamping experimental device according to claim 1, characterized in that, The heating assembly is at least two heating rods.

11. The high-temperature and high-pressure rotary shale oil thermal cracking core clamping experimental device according to claim 1, characterized in that, The total power of the heating assembly is greater than 2KW.

12. A high-temperature and high-pressure rotating shale oil thermal cracking core clamping experimental device according to claim 4, characterized in that, The materials of the sleeve, the first clamping plate, and the second clamping plate are HK40 alloy.

13. A method for using an experimental device for core clamping of high-temperature and high-pressure rotary pyrolysis of shale oil, characterized in that, It includes the following steps S1. Assemble the device and place the core model into the sleeve; S2. Start the heating assembly to heat the core clamping device; Turn on the motor to rotate the clamping device to ensure uniform heating, and stop heating when the temperature reaches the experimental temperature; S3. Open the first detachable cover, open the liquid injection pipeline, use a pressure pump to inject oil into the liquid storage bin to continuously pressurize the experimental device, when the pressure reaches the experimental pressure, turn off the pressure pump, stop injecting oil, and close the gas injection pipeline; S4. Install the first detachable cover plate, reopen the temperature heating component, ensure that the temperature is constant at the experimental temperature and the pressure is constant at the experimental pressure, and continue the experiment for the required time to fully react the pyrolysis of shale oil. S5. After reaching the required experimental time, the pyrolysis reaction of shale oil is sufficient. Turn off the heating device and let the high-temperature and high-pressure rotary shale oil pyrolysis core holder experimental device cool naturally. When the temperature drops to room temperature, open the gas injection pipeline, inject gas, and at the same time open the liquid outlet pipeline to collect the experimental products for analysis.

14. The usage method of a high-temperature and high-pressure rotary shale oil pyrolysis core clamping experimental device according to claim 13, characterized in that, When assembling the device, Install the second detachable holder cover plate at the lower end of the sleeve, connect the support rod of the second detachable cover plate and the fixed rod of the second detachable holder cover plate through a rotary connector, and install the second detachable cover plate at the bottom of the heat preservation cylinder. Place the core model in the sleeve, install the first detachable holder cover plate at the upper end of the sleeve, and make the first clamping plate clamp the core model; install the first detachable cover plate at the upper end of the heat preservation cylinder. Insert the output shaft of the motor into the transmission hole and insert it onto the fixed connector at the upper end of the connecting rod, or let the connecting rod pass through the transmission hole, and use the fixed connector to fixedly connect the output shaft of the motor and the connecting rod.

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