Equipment for testing hydrate generation inhibition capability of magnetic nano material

Abstract

The invention discloses a device for testing hydrate generation inhibition capability of a magnetic nano material, which comprises a reaction kettle, a magnetic field generator, a gas supply device, a liquid supply device, a temperature control device and a pressure sensor, and is characterized in that the reaction kettle comprises an inner cavity and an outer cavity which are not communicated with each other, the outer cavity sleeves the periphery of the inner cavity, and the inner cavity is used for providing a reaction space; the magnetic field generator comprises a power supply part and an electromagnet, the power supply part is conductively connected with the electromagnet, the electromagnet is arranged in the outer cavity, and the magnetic field generator is used for generating an adjustable magnetic field in the inner cavity by adjusting the intensity and direction of input current; the gas supply device is communicated with the inner cavity through a gas conveying pipeline, and the gas supply device is used for introducing reaction gas containing natural gas hydrate into the inner cavity; the liquid supply device is communicated with the inner cavity through a drilling fluid pipeline and is used for introducing drilling fluid containing a magnetic nano material into the inner cavity; the temperature control device is used for controlling the temperature of the inner cavity, so that the temperature of the inner cavity meets the generation temperature of the hydrate; the pressure sensor is provided with a sensing end extending into the inner cavity and is used for detecting the pressure in the inner cavity so as to judge the generation condition of the hydrate.

Description

Technical Field

[0001] This invention relates to the field of natural gas hydrate drilling technology, and in particular to a testing device for the ability of magnetic nanomaterials to inhibit hydrate formation. Background Technology

[0002] Natural gas hydrates have attracted much attention as a clean energy source that can replace petroleum. During the extraction of natural gas hydrates, pressure and temperature changes can cause gaseous natural gas hydrates to form solid natural gas hydrates within pipelines, leading to transmission interruptions, pipeline pressure fluctuations, and accelerated corrosion, seriously threatening the safety of the pipeline system. Therefore, during the extraction process, it is necessary to inject inhibitors to suppress hydrate regeneration and ensure the safe operation of the pipeline.

[0003] Compared to traditional inhibitors, nanomaterials, with their unique size effect, large specific surface area, and high surface energy, exhibit significant advantages in inhibiting hydrate formation, including higher efficiency, longer duration of action, lower dosage, and environmental friendliness, providing a novel solution to the clogging problem during hydrate collection. Magnetic nanomaterials not only possess the properties of general nanomaterials but also allow for the recovery and reuse of nanoparticles through an external magnetic field, reducing costs, making them a highly promising inhibitor material. However, magnetic materials also exhibit a chain reaction of multi-dimensional changes under the influence of a magnetic field, including magnetocaloric, magneto-optical, and magnetostrictive effects. Therefore, the impact of a magnetic field on the inhibitory ability of magnetic nanomaterials as inhibitors warrants further investigation.

[0004] Existing evaluation equipment can only assess the ability of drilling fluid materials to inhibit hydrate formation in the absence of a magnetic field. It cannot determine the ability of drilling fluids containing magnetic nanomaterials to inhibit hydrate formation under specific magnetic field conditions. Summary of the Invention

[0005] The purpose of this invention is to provide a testing device for the ability of magnetic nanomaterials to inhibit hydrate formation, thereby solving the problem that existing testing devices cannot test the ability of drilling fluids containing magnetic nanomaterials to inhibit hydrate formation under certain magnetic field conditions.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A testing device for the ability of magnetic nanomaterials to inhibit hydrate formation includes: A reaction vessel includes an inner cavity and an outer cavity that are not interconnected. The outer cavity is fitted around the inner cavity, and the inner cavity is used to provide reaction space. A magnetic field generator includes a power supply component and an electromagnet, which are electrically connected. The electromagnet is located in the outer cavity. The magnetic field generator is used to generate an adjustable magnetic field in the inner cavity by adjusting the intensity and direction of the input current. A gas supply device is connected to the inner cavity through a gas delivery pipeline. The gas supply device is used to introduce reaction gas into the inner cavity. The fluid supply device is connected to the inner cavity through a drilling fluid pipeline. The fluid supply device is used to introduce drilling fluid containing magnetic nanomaterials into the inner cavity. Temperature control device: The temperature control device is used to control the temperature of the inner cavity so that the temperature of the inner cavity meets the hydrate formation temperature. A pressure sensor, having a sensing end extending into the inner cavity, is used to detect the pressure within the inner cavity to determine the formation of hydrates. Optionally, in the aforementioned testing device for the ability of magnetic nanomaterials to inhibit hydrate formation, the outer cavity includes an interconnected annular sandwich cavity and a bottom cavity. The annular sandwich cavity is coaxially sleeved around the side wall of the inner cavity, and the bottom cavity is located below the inner cavity and communicates with the annular sandwich cavity. An electromagnet is disposed in the outer cavity, and a power supply component is electrically connected to the electromagnet through the annular sandwich cavity.

[0007] Optionally, in the above-mentioned testing device for the ability of magnetic nanomaterials to inhibit hydrate formation, the electromagnet includes a first U-shaped electromagnet, which includes a first vertical arm, a first horizontal connecting arm, and a second vertical arm connected in sequence. The first horizontal connecting arm is horizontally disposed in the bottom cavity, and the first vertical arm and the second vertical arm extend vertically from both ends of the first horizontal connecting arm to the annular interlayer cavity, respectively.

[0008] Optionally, in the above-mentioned testing device for the ability of magnetic nanomaterials to inhibit hydrate formation, the electromagnet further includes a second U-shaped electromagnet. The second U-shaped electromagnet includes a first transverse arm, a second transverse connecting arm, and a second transverse arm connected in sequence. The second U-shaped electromagnet is disposed in an annular interlayer cavity, and the extension directions of the first transverse arm and the second transverse arm are perpendicular to the extension directions of the first vertical arm and the second vertical arm.

[0009] Optionally, in the above-mentioned testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation, the testing equipment further includes a stirring motor and a stirring component, the stirring component being connected to the drive end of the stirring motor, and one end of the stirring component extending into the reaction vessel.

[0010] Optionally, in the above-mentioned testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation, the temperature control device includes: The reactor is placed in a cooling water tank containing coolant. The refrigeration unit is connected to the cooling water tank via pipes and is used to supply coolant to the cooling water tank.

[0011] Optionally, in the above-mentioned testing device for the ability of magnetic nanomaterials to inhibit hydrate formation, a first through hole is formed on the bottom surface of the inner cavity, and a second through hole is formed on the bottom surface of the outer cavity. The testing device for the ability of magnetic nanomaterials to inhibit hydrate formation also includes a drilling fluid discharge pipe, which passes through the first through hole and communicates with the inner cavity through the second through hole. The temperature control device also includes: Frame; The lifting mechanism is fixedly installed on the frame. The lifting end of the lifting mechanism is fixedly connected to the cooling water tank. The lifting mechanism is used to drive the cooling water tank to move along the axis of the reactor.

[0012] Optionally, in the above-mentioned testing equipment for the ability of magnetic nanomaterials to suppress hydrate formation, the gas supply device includes: Gas storage tank, containing reactive gas; An air compressor, connected to an air tank, is used to pressurize the reaction gas and introduce the pressurized reaction gas into the inner cavity.

[0013] Optionally, in the above-mentioned testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation, the testing equipment further includes: A magnetic field strength sensor, which has a sensing end that extends into the inner cavity, is used to monitor the magnetic field strength in the inner cavity; And / or, a temperature sensor having a sensing end that extends into the cavity for detecting the temperature within the cavity.

[0014] Optionally, in the above-mentioned testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation, the testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation further includes a fixed frame, the fixed frame is provided with a fixed rod, and the reaction vessel is fixedly connected to the fixed rod.

[0015] Compared with existing technologies, the testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation provided in this application features a reaction vessel with a double-layer structure design consisting of an unconnected inner cavity and an outer cavity, with the outer cavity surrounding the inner cavity. This design provides an independent space for the hydrate formation reaction while integrating a magnetic field generator into the outer cavity. The electromagnet of the magnetic field generator generates a magnetic field with controllable direction and intensity in the inner cavity by adjusting the intensity and direction of the input current through a power supply component. A gas supply device and a liquid supply device respectively introduce reactive gas and drilling fluid containing magnetic nanomaterials into the inner cavity through gas delivery pipelines and drilling fluid pipelines. The drilling fluid contains water, and the reaction between water and reactive gas is a prerequisite for hydrate formation, simulating the real environment in the flow channel. A temperature control device maintains a low temperature in the inner cavity to meet the requirements for hydrate formation. A pressure sensor extends into the inner cavity to monitor pressure changes in real time to determine the hydrate formation state. During operation: The temperature control device first lowers the internal temperature to the low temperature required for hydrate formation. The gas supply device and liquid supply device inject reactive gas and drilling fluid containing magnetic nanomaterials into the reactor, respectively. The magnetic field generator generates a controllable magnetic field with a specific direction and intensity according to experimental requirements. The pressure sensor continuously monitors pressure changes. When the pressure decreases, it indicates that hydrates have begun to form. By comparing the rate and magnitude of pressure decrease under different magnetic field conditions, a greater rate and magnitude of pressure decrease indicates a stronger hydrate formation capacity. Under the same magnetic field conditions, the inhibition capacity of the magnetic nanomaterials is weaker. By changing the input current intensity and direction of the power supply component, different magnetic fields can be obtained, thus testing the inhibition performance of magnetic nanomaterials on hydrate formation under different magnetic field environments. This setup, by directly integrating the magnetic field generator into the outer cavity of the reactor, achieves flexible control of the magnetic field direction and intensity within a closed reaction space, overcoming the technical deficiency of traditional equipment that cannot simulate the magnetic field environment. At the same time, the combined multi-component collaboration of the temperature control device, gas supply device, liquid supply device, and pressure sensor allows for accurate simulation of the real working environment, enabling precise evaluation of the inhibition performance of magnetic nanomaterials under different magnetic field conditions. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 A schematic diagram of the overall process of a testing device for the ability of magnetic nanomaterials to inhibit hydrate formation, provided in an embodiment of the present invention; Figure 2 A schematic diagram of the overall structure of a testing device for the ability of magnetic nanomaterials to inhibit hydrate formation, provided in an embodiment of the present invention; Figure 3 A schematic top view of a reaction vessel for testing the ability of magnetic nanomaterials to inhibit hydrate formation, provided in an embodiment of the present invention; Figure 4 This is a schematic front view of the reaction vessel of a testing device for the ability of magnetic nanomaterials to inhibit hydrate formation, provided in an embodiment of the present invention.

[0017] Reference numerals: 100 is the reaction vessel, 110 is the inner cavity, 120 is the outer cavity, 121 is the annular jacketed cavity, 122 is the bottom cavity, 130 is the fixing rod, 200 is the first U-shaped electromagnet, 210 is the first vertical arm, 220 is the first horizontal connecting arm, 230 is the second vertical arm, 300 is the second U-shaped electromagnet, 310 is the first horizontal arm, 320 is the second horizontal connecting arm, 330 is the second horizontal arm, 400 is the gas supply device, 410 is the gas storage tank, 420 is the air compressor, 500 is the liquid supply device, 600 is the temperature control device, 610 is the cooling water tank, 620 is the refrigeration component, 700 is the pressure sensor, 710 is the magnetic field strength sensor, 720 is the temperature sensor, and 800 is the stirring motor. Detailed Implementation

[0018] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 this invention.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Please see Figure 1 This invention provides a testing device for the ability of magnetic nanomaterials to inhibit hydrate formation, comprising: a reaction vessel 100, a magnetic field generator, a gas supply device 400, a liquid supply device 500, a temperature control device 600, and a pressure sensor 700. The reaction vessel 100 includes an inner cavity 110 and an outer cavity 120 that are not interconnected. The outer cavity 120 is fitted around the inner cavity 110, which provides the reaction space. The magnetic field generator includes a power supply component and an electromagnet, which are electrically connected. The electromagnet is located in the outer cavity 120. The magnetic field generator is used to control the intensity and direction of the input current within the inner cavity. An adjustable magnetic field is generated within the cavity 110; a gas supply device 400 is connected to the cavity 110 via a gas delivery pipeline, and the gas supply device 400 is used to introduce reaction gas containing natural gas hydrate into the cavity 110; a liquid supply device 500 is connected to the cavity 110 via a drilling fluid pipeline, and the liquid supply device 500 is used to introduce drilling fluid containing magnetic nanomaterials into the cavity 110; a temperature control device 600 is used to control the temperature of the cavity 110 so that the temperature of the cavity 110 meets the hydrate formation temperature; a pressure sensor 700 has a sensing end that extends into the cavity 110, and is used to detect the pressure in the cavity 110 to determine the hydrate formation status.

[0024] In specific implementation: The reactor 100 has a double-layer structure design with an unconnected inner cavity 110 and an outer cavity 120, with the outer cavity 120 nested around the inner cavity 110. This provides an independent space for the hydrate formation reaction, while integrating the electromagnet of the magnetic field generator into the outer cavity 120. The electromagnet of the magnetic field generator generates a magnetic field with controllable direction and intensity in the inner cavity 110 by adjusting the intensity and direction of the input current through the power supply component. The gas supply device 400 and the liquid supply device 500 respectively introduce reaction gas containing natural gas hydrate and drilling fluid containing magnetic nanomaterials into the inner cavity 110 through gas delivery pipelines and drilling fluid pipelines. The drilling fluid contains water, and the reaction of water with the reaction gas is a prerequisite for the formation of hydrate, simulating the real environment in the flow channel. The temperature control device 600 maintains the low temperature condition of the inner cavity 110 to meet the requirements for hydrate formation. The pressure sensor 700 extends into the inner cavity 110 to monitor pressure changes in real time to determine the hydrate formation status. During operation: The temperature control device 600 first lowers the temperature of the inner cavity 110 to the low temperature required for hydrate formation. The gas supply device 400 and the liquid supply device 500 inject reactive gas and drilling fluid containing magnetic nanomaterials into the reaction vessel 100, respectively. The magnetic field generator generates a controllable magnetic field with a specific direction and intensity according to experimental requirements. The pressure sensor 700 continuously monitors pressure changes. When the pressure decreases, it indicates that hydrates begin to form. By comparing the rate and magnitude of pressure decrease under different magnetic field conditions, the greater the rate and magnitude of pressure decrease, the stronger the hydrate formation ability. Under the same magnetic field conditions, the inhibition ability of the magnetic nanomaterials is weaker. By changing the input current intensity and direction of the power supply component, different magnetic fields can be obtained, and the inhibition performance of magnetic nanomaterials on hydrate formation under different magnetic field environments can be tested. This configuration, by directly integrating the magnetic field generator into the outer cavity 120 of the reactor 100, enables flexible control of the direction and intensity of the magnetic field within the sealed reaction space, overcoming the technical shortcomings of traditional equipment that cannot simulate the magnetic field environment. At the same time, the combined use of multiple components, including the temperature control device 600, the gas supply device 400, the liquid supply device 500, and the pressure sensor 700, allows for accurate simulation of the real working environment, enabling precise evaluation of the suppression performance of magnetic nanomaterials under different magnetic field conditions.

[0025] It should be noted that the reactant gases mentioned above include not only common methane (the main component of natural gas hydrates), but also gases such as ethane and carbon dioxide, to simulate the actual hydrate composition. Compressing the reactant gases with an air compressor to provide gas pressure facilitates the formation of solid natural gas hydrates. It is understandable that only by ensuring the successful formation of solid natural gas hydrates can the inhibitory effect of magnetic nanomaterials on their formation be evaluated. If solid natural gas hydrates cannot form, the inhibitory effect cannot be assessed.

[0026] As one possible implementation, such as Figure 2As shown, the outer cavity 120 includes an annular interlayer cavity 121 and a bottom cavity 122 that are interconnected. The annular interlayer cavity 121 is coaxially sleeved around the side wall of the inner cavity 110. The bottom cavity 122 is located below the inner cavity 110 and is connected to the annular interlayer cavity 121. An electromagnet is disposed in the outer cavity 120. The power supply component is electrically connected to the electromagnet through the annular interlayer cavity 121.

[0027] Specifically, the outer cavity 120 adopts a connected structure of an annular interlayer cavity 121 and a bottom cavity 122. The annular interlayer cavity 121 is coaxially sleeved around the side wall of the inner cavity 110, and the bottom cavity 122 is located below the inner cavity 110 and is connected to the annular interlayer cavity 121. The electromagnet is fixedly installed inside the outer cavity 120. Specifically, the electromagnet can be directly placed in the bottom cavity 122 and generate a controllable magnetic field in the inner cavity 110 through the power supply component. Alternatively, a placement bracket can be fixedly installed in the annular interlayer cavity 121 or the bottom cavity 122, and the electromagnet can be placed on the placement bracket to form a relatively stable connection. The power supply component is electrically connected to the electromagnet through the annular interlayer cavity 121. During operation: The power supply component provides current to the electromagnet through the annular interlayer cavity 121 as a communication channel. After being energized, the electromagnet generates a magnetic field and also generates a magnetic field in the inner cavity 110. The connection design between the annular interlayer cavity 121 and the bottom cavity 122 provides a stable and reliable conductive connection path between the power supply component and the electromagnet, avoiding structural interference and safety risks caused by external wiring. On the other hand, integrating the electromagnet into the outer cavity 120 makes the electromagnet closer to the inner cavity 110, improving the efficiency and uniformity of magnetic field application. At the same time, the connection between the annular interlayer cavity 121 and the bottom cavity 122 enhances the compactness and functional integration of the overall structure, which is conducive to the miniaturization and convenience of the equipment.

[0028] As one possible implementation, such as Figure 4 As shown, the electromagnet includes a first U-shaped electromagnet 200. The first U-shaped electromagnet 200 includes a first vertical arm, a first horizontal connecting arm 220 and a second vertical arm 230 connected in sequence. The first horizontal connecting arm 220 is horizontally disposed in the bottom cavity 122. The first vertical arm and the second vertical arm 230 extend vertically from both ends of the first horizontal connecting arm 220 to the annular interlayer cavity 121.

[0029] Specifically, the electromagnet is a first U-shaped electromagnet 200, which is composed of a first vertical arm, a first horizontal connecting arm 220 and a second vertical arm 230 connected in sequence. The first horizontal connecting arm 220 is horizontally disposed in the bottom cavity 122, and the first vertical arm and the second vertical arm 230 extend vertically upward from both ends of the first horizontal connecting arm 220 and extend into the annular interlayer cavity 121. During operation: The power supply component delivers current to the first vertical arm and the second vertical arm 230 of the first U-shaped electromagnet 200 through the annular interlayer cavity 121, causing it to generate a concentrated and directional magnetic field. Since both the first vertical arm and the second vertical arm 230 extend into the annular interlayer cavity 121, the main magnetic field is generated at the U-shaped opening area, thereby enabling the magnetic field to act efficiently on the target object located in the inner cavity 110. At the same time, the use of a U-shaped electromagnet allows it to adapt to the layout of the outer cavity 120. The first lateral connecting arm 220 is set in the bottom cavity 122, making full use of the lateral space of the bottom cavity 122. The first vertical arm and the second vertical arm 230 are naturally embedded in the annular interlayer cavity 121, achieving an efficient and stable connection with the power supply component. With this configuration, the U-shaped electromagnet, due to its open structure, can generate a concentrated and highly directional magnetic field, making it more efficient at targeting the target area compared to other types of electromagnets. Its structural form is highly compatible with the U-shaped channel space formed by the annular interlayer cavity 121 and the bottom cavity 122, achieving appropriate utilization of the internal space of the equipment, avoiding additional space occupation, and enhancing the compactness and integration of the overall structure.

[0030] Furthermore, such as Figure 3 As shown, the electromagnet also includes a second U-shaped electromagnet 300. The second U-shaped electromagnet 300 includes a first transverse arm 310, a second transverse connecting arm 320 and a second transverse arm 330 connected in sequence. The second U-shaped electromagnet 300 is disposed in the annular interlayer cavity 121. The extension directions of the first transverse arm 310 and the second transverse arm 330 are perpendicular to the extension directions of the first vertical arm and the second vertical arm 230.

[0031] Specifically, the electromagnet assembly also includes a second U-shaped electromagnet 300, which is formed by sequentially connecting a first transverse arm 310, a second transverse connecting arm 320, and a second transverse arm 330. The second U-shaped electromagnet 300 is disposed inside the annular interlayer cavity 121, and the extension directions of its first transverse arm 310 and second transverse arm 330 are perpendicular to the extension directions of the first vertical arm and second vertical arm 230 of the first U-shaped electromagnet 200. During operation: the power supply component can selectively supply power to the first U-shaped electromagnet 200 and the second U-shaped electromagnet 300. That is, the power supply component can supply power to the first U-shaped electromagnet 200 alone, so that the first U-shaped electromagnet 200 generates its own magnetic field; the power supply component can supply power to the second U-shaped electromagnet 300 alone, so that the second U-shaped electromagnet 300 generates its own magnetic field; or the power supply component can supply power to the first U-shaped electromagnet 200 and the second U-shaped electromagnet 300 simultaneously, so that the first U-shaped electromagnet 200 and the second U-shaped electromagnet 300 generate magnetic fields with mutually perpendicular orientations. These two magnetic fields are superimposed and coupled in the target area of ​​the inner cavity 110, thereby forming a composite magnetic field, achieving a more complex and three-dimensional magnetic force on the target object; the two U-shaped electromagnets are nested in the spatial layout and do not interfere with each other. The first U-shaped electromagnet 200 mainly utilizes the vertical space of the bottom cavity 122 and the annular interlayer cavity 121, while the second U-shaped electromagnet 300 is completely integrated into the annular interlayer cavity 121, realizing full utilization of the space of the outer cavity 120. This configuration, by arranging two U-shaped electromagnets 200 and 300 with mutually perpendicular magnetic field directions, allows for the generation of three different magnetic fields using only the space of the outer cavity 120, through adjusting the power supply of the power supply components. This achieves full utilization of the space in the outer cavity 120, generating a composite magnetic field and providing evaluation results on the suppression effect on magnetic nanomaterials under various magnetic field conditions. The design highly integrates the two sets of electromagnets within the outer cavity 120, which is composed of an annular interlayer cavity 121 and a bottom cavity 122, without requiring additional expansion of the equipment volume, thus maximizing space utilization. The combined use of the first U-shaped electromagnet 200 and the second U-shaped electromagnet 300 provides an evaluation example for magnetic field control under complex operating conditions, enhancing the functionality of the equipment.

[0032] As one possible implementation, such as Figure 2 As shown, the testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation also includes a stirring motor 800 and a stirring component. The stirring component is connected to the drive end of the stirring motor 800, and one end of the stirring component extends into the reaction vessel 100.

[0033] Specifically, the stirring motor 800 is fixedly mounted on an external support and located at the top of the reactor 100. Its drive end is connected to the stirring component, one end of which extends downward into the reactor 100. During operation: the stirring motor 800 starts and drives the stirring component to rotate within the reactor 100, mechanically agitating the drilling fluid introduced into the reactor 100. The stirring component can be a stirring rod, which achieves basic homogenization; or the stirring component can be a stirring rod with blades added to its surface, which can enhance fluid turbulence and improve the mixing efficiency of the reactant gas and the drilling fluid containing magnetic nanomaterials and water molecules. This mechanical agitation allows the water molecules in the drilling fluid to fully contact and mix with the natural gas, providing the necessary mixing conditions for the formation of solid natural gas hydrates, thereby promoting the nucleation and growth of hydrate crystals. This setup, by introducing a mechanical stirring function, overcomes the defect of uneven reaction between liquid drilling fluid and gaseous natural gas hydrate, ensuring that water molecules and natural gas can fully contact each other, promoting the formation of solid natural gas hydrate, and providing the necessary prerequisite for subsequent evaluation of the inhibitory effect of magnetic nanomaterials on the formation of solid natural gas hydrate.

[0034] As one possible implementation, such as Figure 1 As shown, the temperature control device 600 includes a cooling water tank 610 and a refrigeration component 620; wherein, the reaction vessel 100 is disposed in the cooling water tank 610, and the cooling water tank 610 contains coolant; the refrigeration component 620 is connected to the cooling water tank 610 through a pipeline and is used to supply coolant to the cooling water tank 610.

[0035] In practice, after the refrigeration component 620 is activated, it generates a cryogenic coolant. This coolant is pumped into the cooling water tank 610 through pipelines, maintaining the coolant in the tank at a constant low temperature. The reactor 100, located within the cooling water tank 610 and immersed in the coolant, exchanges heat with the coolant through its walls, maintaining the temperature in its inner cavity 110 at a preset low temperature level. This configuration ensures that the temperature control device 600 provides the necessary low-temperature environment for the formation of solid natural gas hydrates within the reactor 100, guaranteeing the necessary conditions for testing. Furthermore, the indirect cooling method using a liquid medium more realistically simulates the ambient temperature in the drilling environment, making the evaluation results of the magnetic nanomaterial suppression effect more valuable and reliable.

[0036] In some embodiments, the temperature control device 600 can be an air bath cooling method, in which the reactor 100 is placed in a container containing cold air, and the temperature of the inner cavity 110 of the reactor 100 is controlled by adjusting the temperature of the air.

[0037] As one possible implementation, the bottom surface of the inner cavity 110 is provided with a first through hole, and the bottom surface of the outer cavity 120 is provided with a second through hole. The testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation also includes a drilling fluid discharge pipe, which passes through the first through hole and is connected to the inner cavity 110 through the second through hole. The temperature control device 600 also includes a frame and a lifting mechanism. The lifting mechanism is fixedly installed on the frame, and the lifting end of the lifting mechanism is fixedly connected to the cooling water tank 610. The lifting mechanism is used to drive the cooling water tank 610 to move along the axial direction of the reactor 100.

[0038] Specifically, the first through hole on the bottom surface of the inner cavity 110 corresponds to the second through hole on the bottom surface of the outer cavity 120. The drilling fluid discharge pipeline passes through the first through hole and connects to the inner cavity 110 through the second through hole, realizing the drilling fluid discharge path. A valve is installed on the drilling fluid discharge pipeline. When the reactor 100 is located in the cooling water tank 610, the valve is closed; when it is necessary to discharge the drilling fluid, the valve is opened. The temperature control device 600 includes a frame and a lifting mechanism. The lifting mechanism is fixedly installed on the frame, and the lifting end of the lifting mechanism is fixedly connected to the cooling water tank 610, which is used to drive the cooling water tank 610 to move along the axial direction of the reactor 100. During operation: After the test, the lifting mechanism drives the cooling water tank 610 to move away from the bottom of the reactor 100, exposing the first and second through holes and the drilling fluid discharge pipeline. At this time, the valve on the drilling fluid discharge pipeline is opened, and the drilling fluid is completely discharged from the inner cavity 110 through the drilling fluid discharge pipeline under the action of gravity. This design, through the design of the first and second through holes at the bottom and the coordinated operation of the lifting mechanism, ensures that the drilling fluid is completely discharged, avoiding residual reactants from affecting subsequent test results. This maintains the consistency and accuracy of multiple experimental results and improves the reliability and reusability of the testing equipment.

[0039] As one possible implementation, the gas supply device 400 includes a gas storage tank 410 and an air compressor 420; wherein the gas storage tank 410 contains a reaction gas; the air compressor 420 is connected to the gas storage tank 410 and is used to pressurize the reaction gas and introduce the pressurized reaction gas into the inner cavity 110.

[0040] In practice, the air compressor 420 continuously pressurizes the reaction gas in the gas storage tank 410. The air compressor 420 and the gas storage tank 410 are connected to form a pressurized delivery pipeline. The pressurized reaction gas is stably delivered to the inner cavity 110 through the connecting pipeline. This setup, through the coordinated operation of the air compressor 420 and the gas storage tank 410, ensures that the reaction gas maintains sufficient pressure when delivered to the inner cavity 110, providing the necessary high-pressure environment for the formation of solid natural gas hydrate in the reactor 100, thus ensuring the prerequisites for testing. At the same time, it can more realistically simulate the pressure conditions in the drilling environment, making the evaluation results of the suppression effect of magnetic nanomaterials more valuable and reliable.

[0041] In some embodiments, such as Figure 1 As shown, a pressure regulating knob is also installed on the connecting pipeline between the gas supply device 400 and the inner cavity 110. The pressure regulating knob changes the flow cross-sectional area of ​​the pipeline through its internal valve core structure. During operation, by rotating the pressure regulating knob, the flow rate and pressure of the reaction gas entering the inner cavity 110 from the gas supply device 400 can be adjusted. This allows the pressure in the inner cavity 110 to be stabilized at the specific pressure value required for the formation of solid natural gas hydrate, according to experimental needs. This configuration, by adding a pressure regulating knob, enables precise control of the pressure in the inner cavity 110, simulating drilling environments under different pressure conditions. It provides controllable experimental conditions for evaluating the suppression performance of magnetic nanomaterials under different pressure conditions, enhancing the accuracy and reliability of the test results.

[0042] As one possible implementation, such as Figure 2 As shown, the testing device for the ability of magnetic nanomaterials to inhibit hydrate formation also includes a magnetic field strength sensor 710, which has a sensing end extending into the inner cavity 110 for monitoring the magnetic field strength in the inner cavity 110; and / or, the testing device for the ability of magnetic nanomaterials to inhibit hydrate formation also includes a temperature sensor 720, which has a sensing end extending into the inner cavity 110 for detecting the temperature in the inner cavity 110. The magnetic field sensor monitors the change in magnetic field strength in the inner cavity 110 in real time through its sensing end extending into the inner cavity 110, and the temperature sensor 720 monitors the change in temperature in the inner cavity 110 in real time through its sensing end extending into the inner cavity 110. The sensing ends of the magnetic field strength sensor 710 and the temperature sensor 720 continuously collect environmental parameters of the inner cavity 110 and transmit the monitoring data to the external control system in real time, realizing synchronous monitoring and feedback of magnetic field strength and temperature during the testing process. This setup, through the coordinated monitoring of dual sensors, allows for the simultaneous acquisition of precise magnetic field and temperature parameters. This ensures accurate control and real-time recording of key environmental parameters and magnetic field strength during the testing process, providing reliable data support for studying the ability of magnetic nanomaterials to suppress hydrate formation under different magnetic field strengths and improving the accuracy of the test results.

[0043] As one possible implementation, the testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation also includes a fixed frame with a fixing rod 130, and the reaction vessel 100 is fixedly connected to the fixing rod 130. Specifically, the testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation also includes a fixed frame with a fixing rod 130. The fixed frame serves as an overall support structure, and the fixing rod 130 on it forms a rigid fixed connection with the reaction vessel 100, ensuring that the reaction vessel 100 maintains a stable position during operation. In specific implementation, the fixed connection between the fixing rod 130 and the reaction vessel 100 ensures that the reaction vessel 100 maintains a stable position when subjected to internal pressure changes or external operations, avoiding displacement deviations caused by equipment vibration or pressure fluctuations. Furthermore, suspending the reaction vessel 100 by the fixing rod 130 facilitates cooling by external equipment such as the aforementioned cooling water tank 610 located below the reaction vessel 100. This setup, through the coordinated support of the fixed frame and the fixed rod 130, ensures the stability of the reactor 100 during the test, which helps to improve the repeatability of the test and the accuracy of the test results.

[0044] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0045] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A testing device for the ability of magnetic nanomaterials to inhibit hydrate formation, characterized in that, include: A reaction vessel, comprising an inner cavity and an outer cavity that are not interconnected, wherein the outer cavity is fitted around the inner cavity, and the inner cavity is used to provide reaction space; A magnetic field generator includes a power supply component and an electromagnet, the power supply component and the electromagnet being electrically connected, the electromagnet being disposed in the outer cavity, and the magnetic field generator being used to generate an adjustable magnetic field in the inner cavity by adjusting the intensity and direction of the input current; A gas supply device, which is connected to the inner cavity via a gas delivery pipeline, is used to introduce a reaction gas containing natural gas hydrate into the inner cavity. A fluid supply device is connected to the inner cavity via a drilling fluid pipeline. The fluid supply device is used to introduce drilling fluid containing magnetic nanomaterials into the inner cavity. A temperature control device is used to control the temperature of the inner cavity so that the temperature of the inner cavity meets the hydrate formation temperature. A pressure sensor having a sensing end extending into the inner cavity for detecting the pressure in the inner cavity to determine the formation of the hydrate.

2. The testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation according to claim 1, characterized in that, The outer cavity includes an annular interlayer cavity and a bottom cavity that are interconnected. The annular interlayer cavity is coaxially sleeved around the side wall of the inner cavity. The bottom cavity is located below the inner cavity and communicates with the annular interlayer cavity. The electromagnet is disposed in the outer cavity. The power supply component is electrically connected to the electromagnet through the annular interlayer cavity.

3. The testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation according to claim 2, characterized in that, The electromagnet includes a first U-shaped electromagnet, which includes a first vertical arm, a first horizontal connecting arm, and a second vertical arm connected in sequence. The first horizontal connecting arm is horizontally disposed in the bottom cavity, and the first vertical arm and the second vertical arm extend vertically from both ends of the first horizontal connecting arm to the annular interlayer cavity.

4. The testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation according to claim 3, characterized in that, The electromagnet also includes a second U-shaped electromagnet, which includes a first transverse arm, a second transverse connecting arm, and a second transverse arm connected in sequence. The second U-shaped electromagnet is disposed in the annular interlayer cavity, and the extension directions of the first transverse arm and the second transverse arm are perpendicular to the extension directions of the first vertical arm and the second vertical arm.

5. The testing device for the ability of magnetic nanomaterials to inhibit hydrate formation according to claim 1, characterized in that, The testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation also includes a stirring motor and a stirring component. The stirring component is connected to the drive end of the stirring motor, and one end of the stirring component extends into the reaction vessel.

6. The testing device for the ability of magnetic nanomaterials to inhibit hydrate formation according to claim 1, characterized in that, The temperature control device includes: A cooling water tank is provided, and the reaction vessel is disposed in the cooling water tank, which contains coolant. A refrigeration component is connected to the cooling water tank via a pipeline and is used to supply coolant to the cooling water tank.

7. The testing device for the ability of magnetic nanomaterials to inhibit hydrate formation according to claim 6, characterized in that, The inner cavity has a first through hole on its bottom surface, and the outer cavity has a second through hole on its bottom surface. The testing device for the magnetic nanomaterial's ability to inhibit hydrate formation also includes a drilling fluid discharge pipe, which passes through the first through hole and communicates with the inner cavity through the second through hole. The temperature control device also includes: Frame; A lifting mechanism is fixedly mounted on the frame, and the lifting end of the lifting mechanism is fixedly connected to the cooling water tank. The lifting mechanism is used to drive the cooling water tank to move along the axial direction of the reactor.

8. The testing device for the ability of magnetic nanomaterials to inhibit hydrate formation according to claim 1, characterized in that, The gas supply device includes: A gas storage tank containing the reactant gas; An air compressor, which is connected to the air storage tank, is used to pressurize the reaction gas and introduce the pressurized reaction gas into the inner cavity.

9. The testing device for the ability of magnetic nanomaterials to inhibit hydrate formation according to claim 1, characterized in that, The testing equipment for the ability of the magnetic nanomaterials to inhibit hydrate formation also includes: A magnetic field strength sensor, wherein the magnetic field strength sensor has a sensing end that extends into the inner cavity for monitoring the magnetic field strength in the inner cavity; And / or, a temperature sensor having a sensing end extending into the cavity for detecting the temperature in the cavity.

10. The testing device for the ability of magnetic nanomaterials to inhibit hydrate formation according to claim 1, characterized in that, The testing equipment for the ability of magnetic nanomaterials to inhibit hydrate formation also includes a fixed frame, which is equipped with a fixed rod, and the reaction vessel is fixedly connected to the fixed rod.

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