A method of measuring the force of interaction of a hydrate with a particular medium

Abstract

The application provides a device and method for measuring the force of hydrate and specific medium, which comprises an execution module, a sample forming and testing module, a gas supply module, a cooling module and an index detection module, the execution module comprises a speed regulating motor, a quick connector, a hollow rotating rod and a first cooling cavity; the sample forming and testing module comprises a first testing module and a second testing module, and both are located in the first cooling cavity; the gas supply module is connected with the side end of the quick connector; the cooling module is enveloped outside the external space of the sample forming and testing module to cool the sample forming and testing module; the index detection module is used for measuring the video image, temperature, pressure and measurement display inside the first testing module and the second testing module. The test method and device in the application can test the influence of force on particle adhesion and friction in different action directions, can test the sample shear and tensile strength, and the test precision is more accurate and stable.

Description

Technical Field

[0001] This invention relates to the field of natural gas hydrate exploration and development technology, and in particular to an apparatus and method for measuring the interaction force between hydrates and a specific medium. Background Technology

[0002] With the increasing difficulty and environmental pollution caused by the extraction of conventional fossil fuels, countries around the world attach great importance to the exploration and development of new energy sources. Among them, natural gas hydrates have advantages such as huge reserves and cleanliness, but there are still many key scientific issues to be solved for their commercial extraction.

[0003] Interparticle forces directly affect issues such as sand production from hydrate reservoirs, hydrate blockage in pipelines, and formation stability. Studying the forces between hydrates and formation particles / other materials, and clarifying their interaction patterns, is of great significance for solving these problems. In addition, in conventional oil and gas gathering and transportation, accumulating hydrates can block gathering and transportation pipelines. Solving this problem also requires studying the forces between hydrate particles or between hydrates and metallic materials.

[0004] Existing testing devices for hydrate particles generally fall into two categories: one directly measures adhesion and friction using a high-precision displacement stage and force sensors; the other indirectly measures adhesion using a metal wire with a known elastic modulus, calculating it using Hooke's Law, but cannot measure friction. Furthermore, neither of these devices can measure interparticle forces when complex forces are present. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention provides an apparatus and method for measuring the interaction force between hydrates and a specific medium. This method and apparatus can measure the interaction force between particles, especially the effect of force in different directions on particle adhesion and friction. It can also test the shear and tensile strength of samples. Furthermore, by adjusting the torque and tilt angle, the test results are more accurate and stable.

[0006] To address the above problems, the present invention provides a device for measuring the interaction force between hydrates and a specific medium, comprising:

[0007] The execution module includes a speed-regulating motor, a quick connector connected to the output shaft of the speed-regulating motor, a hollow rotating rod sleeved on the top of the quick connector, and a first cooling cavity enclosing the hollow rotating rod, wherein the top of the quick connector passes through the bottom of the first cooling cavity, and the hollow rotating rod is horizontally symmetrical about the vertical central axis of the quick connector.

[0008] The sample formation and testing module includes a first testing module and a second testing module connected to both ends of the hollow rotating rod of the execution module. The first testing module and the second testing module are respectively connected to the middle hole of the corresponding hollow rotating rod and are both located in the first cooling cavity.

[0009] A gas supply module is connected to the side end of the quick connector. Gas from the gas supply module flows from the quick connector into the middle hole of the hollow rotating rod and into the interior of the first test module and the second test module, so as to form a test atmosphere for the samples in the first test module and the second test module.

[0010] A cooling module is enclosed in the external space of the sample formation and testing module to circulate cooling to the sample formation and testing module;

[0011] The indicator detection module is used to measure video images, temperature, pressure, and measurement displays inside the first test module and the second test module.

[0012] Furthermore, the first test module includes a first pressure vessel, a first pressure end cap with a sealing cover on the outer end of the first pressure vessel, a first slide rod sleeved on the end of the hollow rotating rod, and a first sample holder slidably connected to the first slide rod. The first slide rod and the first sample holder are located in the sealed space formed by the first pressure vessel and the first pressure end cap.

[0013] Furthermore, the second test module includes a second pressure vessel, a second pressure end cap with a sealing cover on the outer end of the second pressure vessel, a second slide rod sleeved on the end of the hollow rotating rod, and a second sample holder slidably connected to the second slide rod. The second slide rod and the second sample holder are located in the sealed space formed by the second pressure vessel and the second pressure end cap.

[0014] Furthermore, the gas supply module includes a gas source, a booster pump, and a needle valve connected in sequence, with the end of the needle valve connected to the side end of the quick connector.

[0015] Furthermore, the cooling module includes a cooling circulation bath, a second cooling chamber, and a connecting pipe. The second cooling chamber is sealed outside the second cooling chamber of the sample forming and testing module and the execution module. One side of the cooling circulation bath is connected to the top side of the second cooling chamber through the connecting pipe, and the other side of the cooling circulation bath is connected to the bottom side of the second cooling chamber through the connecting pipe, so as to form a cooling circulation loop.

[0016] Furthermore, the first sample holder includes a first square sample groove, a first square sample dish, a first circular sample dish, and a first fastening ring and a second fastening ring connected to both sides of the body of the first sample holder. The first square sample groove, the first square sample dish, and the first circular sample dish are disposed on the upper surface of the body of the first sample holder and are symmetrical about the hollow rotating rod. The first fastening ring and the second fastening ring are sealed and connected to both ends of the first slide rod.

[0017] Furthermore, the second sample holder includes a second square sample groove, a second square sample dish, a second circular sample dish, and a third and a fourth fastening ring connected to both sides of the body of the second sample holder. The second square sample groove, the second square sample dish, and the second circular sample dish are disposed on the upper surface of the body of the second sample holder and are symmetrical about the hollow rotating rod. The third and the fourth fastening rings are sealed to both ends of the second slide rod.

[0018] Furthermore, the sidewall of the first square sample slot is provided with a first sample protrusion, and the sidewall of the second square sample slot is provided with a second sample protrusion. The sidewall surfaces of the first sample protrusion and the second sample protrusion are suitable for applying hydrate samples.

[0019] Furthermore, the indicator detection module includes a first camera located on top of the first pressure vessel, a second camera located on top of the second pressure vessel, a first temperature sensor located in the second cooling chamber and close to the first test module, a second temperature sensor located in the second cooling chamber and close to the second test module, a pressure sensor connected between the quick connector and the needle valve, and a display device. The display device is electrically connected to the first camera, the second camera, the first temperature sensor, the second temperature sensor, the pressure sensor, and the speed-regulating motor, respectively.

[0020] The present invention also provides a method for measuring the interaction force between hydrates and a specific medium, using the aforementioned apparatus for measuring the interaction force between hydrates and a specific medium, comprising the following steps:

[0021] S1: Parameter settings:

[0022] Set the parameters for the indicator detection module, gas supply module, execution module, and cooling module;

[0023] S2: System precooling:

[0024] Turn on the cooling module to bring the sample formation and testing module to the experimental set temperature and maintain stability;

[0025] S3: Add sample:

[0026] Open the sample formation and testing module, take out the sample holder, add the hydrate sample, and adjust the position x of the sample holder on the slide bar and the horizontal tilt angle θ, then close the sample formation and testing module tightly;

[0027] S4: Inflation complete:

[0028] Turn on the gas supply module to allow gas to flow into the sample formation and testing module, adjust the inlet pressure and maintain it for a period of time, and observe the formation of hydrate samples through the index detection module;

[0029] S5: Sample Testing

[0030] Adjust the execution module, set a certain rotation speed to obtain different centrifugal forces, control different angular accelerations to obtain different tangential forces, and test the shear and tensile strength of the sample.

[0031] Compared with the prior art, the present invention has significant advantages and beneficial effects, specifically reflected in the following aspects:

[0032] 1. In this invention, gas is pumped into the sample formation and testing module through a gas supply module to create the required gas atmosphere; the execution module controls the motion of the sample formation and testing module by a speed-regulating motor, and supplies gas to the interior of the first and second testing modules through a hollow rotating rod to create a testing environment; the sample formation and testing module is used to form the sample particle testing state and test the effect of force on the adhesion and friction of sample particles under different directions of action; the cooling module is used to construct the hydrate formation temperature; and the index detection module 1 is used to measure the video image, temperature, pressure and measurement display of hydrate formation.

[0033] 2. Centrifugal force is used to test the interparticle forces of hydrates. During the test, only the rotation speed and torque need to be adjusted. Adhesion and friction can also be measured. When the test sample is a columnar sample, its shear strength or tensile strength can be tested.

[0034] 3. The parameters that need to be controlled in the experiment are relatively easy to obtain accurately, and the test results depend on the rotational speed and torque. The rotational speed varies widely, generally from tens to tens of thousands, which can be easily obtained. In other words, the range of test forces is wide and easy to control. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the device for measuring the interaction force between hydrates and a specific medium in an embodiment of the present invention;

[0036] Figure 2 This is a top view of the first cooling cavity and the second cooling cavity in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the sample formation and testing module in an embodiment of the present invention;

[0038] Figure 4 This is a top view of the first sample holder in an embodiment of the present invention;

[0039] Figure 5 This is a schematic cross-sectional view of the first sample holder in an embodiment of the present invention;

[0040] Figure 6 This is a top view of the second sample holder in an embodiment of the present invention;

[0041] Figure 7 This is a schematic cross-sectional view of the second sample holder in an embodiment of the present invention;

[0042] Figure 8 This is a detailed flowchart illustrating the method for measuring the interaction force between hydrates and a specific medium in an embodiment of the present invention.

[0043] Figure 9 This is a schematic diagram of the force analysis of the hydrate sample during testing when θ=0 in an embodiment of the present invention;

[0044] Figure 10 This is a schematic diagram of the force analysis of the hydrate sample in the square or round sample dish during the test when θ≠0 in an embodiment of the present invention.

[0045] Figure label:

[0046] 1-Indicator detection module;

[0047] 11-Display device; 12-First camera; 13-Second camera; 14-First temperature sensor; 15-Second temperature sensor; 16-Pressure sensor;

[0048] 2-Sample formation and testing module;

[0049] 21-First Test Module;

[0050] 211-First pressure vessel; 212-First pressure end cap; 213-First slide rod; 214-First sample holder; 2141-First square sample slot; 21411-First sample boss; 2142-First square sample dish; 2143-First round sample dish; 2144-First fastening ring; 2145-Second fastening ring;

[0051] 22-Second Test Module;

[0052] 221-Second pressure vessel; 222-Second pressure end cap; 223-Second slide bar; 224-Second sample holder; 2241-Second square sample slot; 22411-Second sample boss; 2242-Second square sample dish; 2243-Second round sample dish; 2244-Third fastening ring; 2245-Fourth fastening ring;

[0053] 3-Gas supply module;

[0054] 31-Air source; 32-Booster pump; 33-Needle valve;

[0055] 4-Execution module;

[0056] 41-Speed-regulating motor; 42-Quick connector; 43-Hollow rotating rod; 44-First cooling chamber;

[0057] 5-Cooling module;

[0058] 51-Cooling circulation bath; 52-Second cooling chamber; 53-Connecting pipe; Detailed Implementation

[0059] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0060] In the description of this invention, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "left," "right," "up," and "down" in the accompanying drawings are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] In the description of this invention, it should be noted that the terms "first," "second," "third," "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0062] Furthermore, 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 fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to wireless connections or wired connections. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0063] Please see Figure 1-7 As shown, this embodiment of the invention provides a device for measuring the interaction force between hydrates and a specific medium. The device includes an execution module 4, a sample formation and testing module 2, a gas supply module 3, a cooling module 5, and an index detection module 1, wherein:

[0064] The execution module 4 includes a speed-regulating motor 41, a quick connector 42, a hollow rotating rod 43, and a first cooling chamber 44. The quick connector 42 is connected to the output shaft of the speed-regulating motor 41. The hollow rotating rod 43 is horizontally sleeved on the top end of the quick connector 42. The hollow rotating rod 43 is sealed inside the first cooling chamber 44, and the top end of the quick connector 42 passes through the bottom of the first cooling chamber 44. The connection between the quick connector 42 and the first cooling chamber 44 is sealed to prevent air leakage and to make the hollow rotating rod 43 horizontally symmetrical about the vertical central axis of the quick connector 42.

[0065] The sample formation and testing module 2 includes a first testing module 21 and a second testing module 22. The first testing module 21 and the second testing module 22 are symmetrically connected to the two ends of the hollow rotating rod 43 of the execution module 4. The first testing module 21 and the second testing module 22 are respectively connected to the middle hole of the corresponding hollow rotating rod 43 and are both located in the first cooling chamber 44.

[0066] The gas supply module 3 is connected to the side of the quick connector 42, so that the gas supplied by the gas supply module 3 can enter the quick connector 42. The gas from the gas supply module 3 flows from the quick connector 42 into the middle hole of the hollow rotating rod 43, and then through the middle hole of the hollow rotating rod 43 to the interior of the first test module 21 and the second test module 22, so as to form a test atmosphere for the samples of the first test module 21 and the second test module 22.

[0067] The cooling module 5 encloses the external space of the sample formation and testing module 2 to circulate and cool the sample formation and testing module 2.

[0068] The indicator detection module 1 is used to measure video images, temperature, pressure, and measurement displays inside the first test module 21 and the second test module 22.

[0069] It should be noted that in this embodiment, the sample formation and testing module 2 can be configured as multiple modules, and the multiple sample formation and testing modules 2 are uniformly and symmetrically connected to the top of the hollow rotating rod 43 of the execution module 4.

[0070] Therefore, gas is pumped into the sample formation and testing module 2 through the gas supply module 3 to form the required gas atmosphere; the execution module 4 controls the motion of the sample formation and testing module 2 by the speed regulating motor 41, and supplies gas into the first testing module 21 and the second testing module 22 through the hollow rotating rod 43 to form the testing environment; the sample formation and testing module 2 is used to form the sample particle testing state and test the effect of force on the adhesion and friction of sample particles under different directions of action; the cooling module 5 is used to construct the hydrate formation temperature; and the index detection module 1 is used to measure the video image, temperature, pressure and measurement display of hydrate formation.

[0071] The device calculates centrifugal force and tangential force by controlling the rotational speed, angular acceleration, and torque of the speed-regulating motor 41, and establishes a relationship with adhesion force and friction force. This allows the device to test the effect of force on the adhesion and friction of sample particles under different directions of action. It can also design loads independently to examine the changes in friction force, and test the shear and tensile strength of the sample. Moreover, its test accuracy depends only on the measurement of rotational speed and torque, resulting in more accurate and stable test results.

[0072] Specifically, please refer to Figure 1 , 2 As shown, in an embodiment of the present invention, the first test module 21 includes a first pressure vessel 211, a first pressure end cap 212 sealingly covering the outer end of the first pressure vessel 211, a first slide rod 213 sleeved on the end of the hollow rotating rod 43, and a first sample holder 214 slidably connected to the first slide rod 213. The first slide rod 213 and the first sample holder 214 are located in the sealed space formed by the first pressure vessel 211 and the first pressure end cap 212.

[0073] Thus, the first pressure end cap 212 and the first pressure vessel 211 are used to construct the sealed space environment of the first test module 21, and the first sample holder 214 can slide on the hollow rotating rod 43 to form different frictional and adhesive forces on the sample particles.

[0074] Specifically, please refer to Figure 1 , 2 As shown, in an embodiment of the present invention, the second test module 22 includes a second pressure vessel 221, a second pressure end cap 222 sealingly covering the outer end of the second pressure vessel 221, a second slide rod 223 sleeved on the end of the hollow rotating rod 43, and a second sample holder 224 slidably connected to the second slide rod 223. The second slide rod 223 and the second sample holder 224 are located in the sealed space formed by the second pressure vessel 221 and the second pressure end cap 222.

[0075] In this embodiment, the liquid is mainly added by directly adding an appropriate amount to the first sample holder 214 or the second sample holder 224 via the first pressure end cap 212 or the second pressure end cap 222 using a micro-syringe.

[0076] Thus, the second pressure end cap 222 and the second pressure vessel 221 are used to construct the sealed space environment of the second test module 22, and the second sample holder 224 can slide on the hollow rotating rod 43 to form different frictional and adhesive forces on the sample particles.

[0077] Specifically, please refer to Figure 1 As shown, in an embodiment of the present invention, the gas supply module 3 includes a gas source 31, a booster pump 32 and a needle valve 33 connected in sequence, with the end of the needle valve 33 connected to the side end of the quick connector 42.

[0078] Therefore, by opening the gas source 31, adjusting the inlet pressure using the booster pump 32, and opening the needle valve 33 to allow gas to flow into the pressure vessel, different waiting times are set according to the different samples to wait for the formation of hydrate samples.

[0079] Specifically, please refer to Figure 1 As shown, in an embodiment of the present invention, the cooling module 5 includes a cooling circulation bath 51, a second cooling chamber 52, and a connecting pipe 53. The second cooling chamber 52 is sealed outside the first cooling chamber 44 of the sample forming and testing module 2 and the execution module 4. One side of the cooling circulation bath 51 is connected to the top side of the second cooling chamber 52 through the connecting pipe 53, and the other side of the cooling circulation bath 51 is connected to the bottom side of the second cooling chamber 52 through the connecting pipe 53, so as to form a cooling circulation loop.

[0080] Therefore, the cooling module 5 cools down the formation temperature of the hydrate through the cooling circulation bath 51.

[0081] Specifically, please refer to Figure 1 , 3 As shown in Figures 4 and 5, in an embodiment of the present invention, the first sample holder 214 includes a first square sample groove 2141, a first square sample dish 2142, a first circular sample dish 2143, and a first fastening ring 2144 and a second fastening ring 2145 connected to both sides of the body of the first sample holder 214. The first square sample groove 2141, the first square sample dish 2142, and the first circular sample dish 2143 are disposed on the upper surface of the body of the first sample holder 214 and are symmetrical about the hollow rotating rod 43. The first fastening ring 2144 and the second fastening ring 2145 are sealed and connected to both ends of the first slide rod 213.

[0082] The first sample holder 214 is fixed to the first slide rod 213 by the first fastening ring 2144 and the second fastening ring 2145, and can slide left and right on the first slide rod 213 by x (0-50cm) and tilt at an angle θ (0-360°) relative to the horizontal, thereby adjusting the rotation distance x and the tilt angle θ during rotation.

[0083] Thus, suitable samples can be adhered to the surfaces of the first square sample dish 2142 and the first circular sample dish 2143, and hydrates can then be formed on the samples. The sidewall surface of the first square sample groove 2141 is used to adhere suitable samples, so as to construct the effect of different test forces on particle adhesion and friction under different action directions.

[0084] Specifically, please refer to Figure 1 , 3 As shown in Figures 4 and 5, in an embodiment of the present invention, the second sample holder 224 includes a second square sample groove 2241, a second square sample dish 2242, a second circular sample dish 2243, and a third fastening ring 2244 and a fourth fastening ring 2245 connected to both sides of the body of the second sample holder 224. The second square sample groove 2241, the second square sample dish 2242, and the second circular sample dish 2243 are disposed on the upper surface of the body of the second sample holder 224 and are symmetrical about the hollow rotating rod 43. The third fastening ring 2244 and the fourth fastening ring 2245 are sealed and connected to both ends of the second slide rod 223.

[0085] The second sample holder 224 also has the following structure. The second sample holder 224 is fixed to the second slide rod 223 by the third fastening ring 2244 and the fourth fastening ring 2245. It can slide left and right on the second slide rod 223 by x (0-50cm) and tilt at an angle θ (0-360°) to the horizontal, thereby adjusting the rotation distance x and the tilt angle θ during rotation.

[0086] Similarly, suitable samples can be adhered to the surfaces of the second square sample dish 2242 and the second circular sample dish 2243, and hydrates can then be formed on the samples; the side wall surface of the second square sample groove 2241 is used to adhere suitable samples to construct the effect of different test forces on particle adhesion and friction under different directions of action.

[0087] Specifically, please refer to Figure 4 , 5 As shown in Figures 6 and 7, in an embodiment of the present invention, the side wall of the first square sample groove 2141 is provided with a first sample protrusion 21411, and the side wall of the second square sample groove 2241 is provided with a second sample protrusion 22411. The side wall surfaces of the first sample protrusion 21411 and the second sample protrusion 22411 are suitable for applying hydrate samples.

[0088] In this embodiment, hydrate samples are attached to the sidewall surfaces of the first sample protrusion 21411 and the second sample protrusion 22411 to construct a vertical particle adhesion force situation.

[0089] Specifically, please refer to Figure 1 As shown, in an embodiment of the present invention, the index detection module 1 includes a first camera 12 located on top of the first pressure vessel 211, a second camera 13 located on top of the second pressure vessel 221, a first temperature sensor 14 located in the second cooling chamber 52 and near the first test module 21, a second temperature sensor 15 located in the second cooling chamber 52 and near the second test module 22, a pressure sensor 16 connected between the quick connector 42 and the needle valve 33, and a display device 11. The display device 11 is electrically connected to the first camera 12, the second camera 13, the first temperature sensor 14, the second temperature sensor 15, the pressure sensor 16, and the speed regulating motor 41.

[0090] Therefore, the first sample holder 214 and the second sample holder 224 are used to form samples. The state of the samples mainly includes the formation, decomposition, destruction and adhesion of hydrates. The state of the samples is recorded by the first camera 12 and the second camera 13 and is displayed in real time on the display device 11.

[0091] The temperature of the cooling circulating bath 51 is monitored by the first temperature sensor 14 and the second temperature sensor 15, the pressure is controlled by the air source 31 and the booster pump 32, the pressure is monitored by the pressure sensor 16, and the temperature and pressure data are recorded and processed by the display device 11.

[0092] like Figure 8 , 9 As shown, embodiments of the present invention also provide a method for measuring the interaction force between hydrates and a specific medium, using the aforementioned apparatus for measuring the interaction force between hydrates and a specific medium, comprising the following steps:

[0093] S1: Parameter settings:

[0094] Set the parameters for the indicator detection module 1, gas supply module 3, execution module 4, and cooling module 5;

[0095] S2: System precooling:

[0096] Turn on the cooling module 5 to bring the sample formation and testing module 2 to the experimental set temperature and maintain it stable;

[0097] S3: Add sample:

[0098] Open the sample formation and testing module 2, take out the sample holder, add the hydrate sample, and adjust the position x of the sample holder on the slide bar and the horizontal tilt angle θ, then close the sample formation and testing module 2 tightly;

[0099] S4: Inflation complete:

[0100] Turn on the gas supply module 3 to allow gas to flow into the sample formation and testing module 2, adjust the inlet pressure and maintain it for a period of time, and observe the formation of hydrate samples through the index detection module 1;

[0101] S5: Sample Testing

[0102] Adjust the execution module 4, set a certain rotation speed to obtain different centrifugal forces, control different angular accelerations to obtain different tangential forces, and test the shear and tensile strength of the sample.

[0103] Please see Figure 9 , 10 As shown, turn on the speed-regulating motor 41, set an appropriate speed to obtain different centrifugal forces F1, and control different angular accelerations to obtain different tangential forces F2:

[0104] (1)

[0105] (2)

[0106] In the formula: m is the mass of the hydrate sample; ω is the angular velocity; r is the radius of the hollow rotating rod 43; x is the position of the sample on the slide rod; Angular acceleration;

[0107] Please see Figure 9 As shown, when θ=0, the forces acting on the first sample protrusion 21411, the first square sample dish 2142, and the first circular sample dish 2143 are respectively as follows: Figure 9 As shown in (a), 9(b), and 9(c):

[0108] against Figure 9 (a) In this case, the centripetal force F1 is provided by the adhesive force F, and the tangential force F2 is provided by the frictional force f. The adhesive force and the frictional force act simultaneously, which allows for the testing of the sample's shear and tensile strength, i.e.:

[0109] (3)

[0110] (4)

[0111] against Figure 9 Regarding (b) and 9(c), the centripetal force F1 is composed of the radial component of the frictional force f. Provided, the tangential force F2 is composed of the tangential component. Provided, the angle between f and the radial direction is β, only frictional force is involved, which can simulate shear strength testing, i.e.:

[0112] (5)

[0113] (6)

[0114] (7)

[0115] (8)

[0116] When θ≠0, the sample force on the first sample boss 21411 is as follows: Figure 9 As shown in (a), the forces acting on the samples in the first square sample dish 2142 and the first circular sample dish 2143 are as follows: Figure 10 As shown.

[0117] against Figure 10 In this regard, the centripetal force F1 is composed of the radial component of the frictional force f. Provided, the tangential force F2 is composed of the tangential component of the frictional force. Provided by the resultant force of normal stress, with f making an angle β with the radial direction, friction testing with normal stress can simulate shear strength testing under axial compression, i.e.:

[0118] (9)

[0119] (10)

[0120] (11)

[0121] (12)

[0122] (13)

[0123] This invention uses centrifugal force to test the interparticle forces of hydrates. During the test, only the rotation speed and torque need to be adjusted. It can also measure adhesion and friction. When the test sample is a columnar sample, its shear strength or tensile strength can be tested.

[0124] The parameters required for the experiment are relatively easy to obtain accurately, and the test results depend on the rotational speed and torque. The rotational speed varies widely, generally from tens to tens of thousands, which can be easily obtained. In other words, the range of test forces is wide and easy to control.

[0125] The experimental setup can test up to 6 samples at a time, which is highly efficient and provides strong control. It is easy to compare the differences between different samples in the same group of experiments, and has unique advantages for evaluating the effects of additives or different materials on adhesion and friction.

[0126] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A method for measuring the interaction force between hydrates and a specific medium, characterized in that, The device includes an apparatus for measuring the interaction force between hydrates and a specific medium, the apparatus comprising: The execution module (4) includes a speed-regulating motor (41), a quick connector (42) connected to the output shaft of the speed-regulating motor (41), a hollow rotating rod (43) sleeved on the top of the quick connector (42), and a first cooling cavity (44) enclosing the hollow rotating rod (43). The top of the quick connector (42) passes through the bottom of the first cooling cavity (44), and the hollow rotating rod (43) is horizontally symmetrical about the vertical central axis of the quick connector (42). The sample formation and testing module (2) includes a first testing module (21) and a second testing module (22) connected to both ends of the hollow rotating rod (43) of the execution module (4). The first testing module (21) and the second testing module (22) are respectively connected to the middle hole of the corresponding hollow rotating rod (43) and are both located in the first cooling cavity (44). The first test module (21) includes a first pressure vessel (211), a first pressure end cap (212) with a sealing cover on the outer end of the first pressure vessel (211), a first slide rod (213) sleeved on the end of the hollow rotating rod (43), and a first sample holder (214) slidably connected to the first slide rod (213). The first slide rod (213) and the first sample holder (214) are located in the sealed space formed by the first pressure vessel (211) and the first pressure end cap (212). The second test module (22) includes a second pressure vessel (221), a second pressure end cap (222) with a sealing cover on the outer end of the second pressure vessel (221), a second slide rod (223) sleeved on the end of the hollow rotating rod (43), and a second sample holder (224) slidably connected to the second slide rod (223). The second slide rod (223) and the second sample holder (224) are located in the sealed space formed by the second pressure vessel (221) and the second pressure end cap (222). Gas supply module (3), the gas supply module (3) is connected to the side end of the quick connector (42), the gas of the gas supply module (3) flows from the quick connector (42) into the middle hole of the hollow rotating rod (43) to the interior of the first test module (21) and the second test module (22) so as to form a test atmosphere for the samples of the first test module (21) and the second test module (22); The gas supply module (3) includes a gas source (31), a booster pump (32) and a needle valve (33) connected in sequence, with the end of the needle valve (33) connected to the side end of the quick connector (42); A cooling module (5) is enclosed in the external space of the sample forming and testing module (2) to circulate cooling of the sample forming and testing module (2); The cooling module (5) includes a cooling circulation bath (51), a second cooling chamber (52), and a connecting pipe (53). The second cooling chamber (52) is sealed outside the first cooling chamber (44) of the sample forming and testing module (2) and the execution module (4). One side of the cooling circulation bath (51) is connected to the top side of the second cooling chamber (52) through the connecting pipe (53), and the other side of the cooling circulation bath (51) is connected to the bottom side of the second cooling chamber (52) through the connecting pipe (53) to form a cooling circulation loop. The indicator detection module (1) is used to measure the video images, temperature, pressure and measurement display inside the first test module (21) and the second test module (22); The method includes the following steps: S1: Parameter settings: Set the parameters of the indicator detection module (1), gas supply module (3), execution module (4), and cooling module (5); S2: System precooling: Turn on the cooling module (5) to bring the sample formation and testing module (2) to the experimental set temperature and maintain it stable; S3: Add sample: Open the sample formation and testing module (2), take out the sample holder, add the hydrate sample, and adjust the position x of the sample holder on the slide bar and the horizontal tilt angle θ, and close the sample formation and testing module (2). S4: Inflation complete: Turn on the gas supply module (3) to allow gas to flow into the sample formation and testing module (2), adjust the inlet pressure and maintain it for a period of time, and observe the formation of hydrate samples through the index detection module (1); S5: Sample Testing Adjust the execution module (4), set a certain rotation speed to obtain different centrifugal forces, control different angular accelerations to obtain different tangential forces, and test the shear and tensile strength of the sample.

2. The method for measuring the interaction force between hydrates and a specific medium according to claim 1, characterized in that, The first sample holder (214) includes a first square sample groove (2141), a first square sample dish (2142), a first circular sample dish (2143), and a first fastening ring (2144) and a second fastening ring (2145) connected to both sides of the body of the first sample holder (214). The first square sample groove (2141), the first square sample dish (2142), and the first circular sample dish (2143) are disposed on the upper surface of the body of the first sample holder (214) and are symmetrical about the hollow rotating rod (43). The first fastening ring (2144) and the second fastening ring (2145) are sealed and connected to both ends of the first slide rod (213).

3. The method for measuring the interaction force between hydrates and a specific medium according to claim 2, characterized in that, The second sample holder (224) includes a second square sample groove (2241), a second square sample dish (2242), a second round sample dish (2243), and a third fastening ring (2244) and a fourth fastening ring (2245) connected to both sides of the body of the second sample holder (224). The second square sample groove (2241), the second square sample dish (2242), and the second round sample dish (2243) are disposed on the upper surface of the body of the second sample holder (224) and are symmetrical about the hollow rotating rod (43). The third fastening ring (2244) and the fourth fastening ring (2245) are sealed and connected to both ends of the second slide rod (223).

4. The method for measuring the interaction force between hydrates and a specific medium according to claim 3, characterized in that, The first square sample groove (2141) has a first sample protrusion (21411) on its side wall, and the second square sample groove (2241) has a second sample protrusion (22411) on its side wall. The side wall surfaces of the first sample protrusion (21411) and the second sample protrusion (22411) are suitable for applying hydrate samples.

5. The method for measuring the interaction force between hydrates and a specific medium according to claim 1, characterized in that, The index detection module (1) includes a first camera (12) located on the top of the first pressure vessel (211), a second camera (13) located on the top of the second pressure vessel (221), a first temperature sensor (14) located in the second cooling chamber (52) and close to the first test module (21), a second temperature sensor (15) located in the second cooling chamber (52) and close to the second test module (22), a pressure sensor (16) connected between the quick connector (42) and the needle valve (33), and a display device (11). The display device (11) is electrically connected to the first camera (12), the second camera (13), the first temperature sensor (14), the second temperature sensor (15), the pressure sensor (16), and the speed regulating motor (41).

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