Multi-phase flow erosion corrosion test device and method

Abstract

The invention provides a multiphase flow erosion corrosion test device and a multiphase flow erosion corrosion test method. In the multiphase flow erosion corrosion test device, a plurality of gas tanks are connected with a plurality of pressure regulating valves in a one-to-one correspondence manner, the pressure regulating valves are connected with a gas storage tank, the gas storage tank is connected with a pressure reducing valve, the pressure reducing valve is connected with an adjustable throttle valve, the adjustable throttle valve is connected with a first heater, and the first heater is connected with a first ball valve; the second ball valve is connected with a second heater, the second heater is connected with a slurry pump, and the slurry pump is connected with a solid-liquid mixing tank; the third ball valve is connected with a booster pump, the booster pump is connected with a third heater, the third heater is connected with a fourth ball valve and a fifth ball valve, and the fourth ball valve and the fifth ball valve are connected with the erosion cavity and the test pipeline in a one-to-one correspondence mode; the third ball valve is connected with the first ball valve and the second ball valve.

Description

Technical Field

[0001] The invention relates to the technical field of pipe erosion corrosion research, and in particular to a multiphase flow erosion corrosion test device and method. Background Art

[0002] Erosion corrosion refers to the phenomenon of the material surface falling off due to the erosion of solid particles or droplets at a certain angle and speed. This phenomenon is widely present in various industrial processes, such as aeroengine equipment in the aviation industry, crushing machinery in the mining industry, pipe systems and boilers in the energy and chemical industry, etc. Material erosion is the key cause of structural damage and failure. According to statistics, the annual losses caused by wear and tear are as high as hundreds of billions of US dollars, of which erosion causes losses of more than 10%. Focusing on the oil and gas industry, the erosion failure of pipes is the key factor leading to the destruction of oil pipes. In the process of oil and gas production, almost all oil pipes are inevitably eroded by solid particles or droplets in the fluid in the pipe. Under harsh working conditions, sensitive parts of pipe fittings, such as elbows, valves, tees, etc., are prone to perforation or even breakage, which can cause equipment failure and pipeline leakage, posing a serious threat to on-site operators and equipment, and causing damage to the surrounding environment.

[0003] Erosion corrosion is a complex phenomenon affected by different nonlinear factors, which is mainly related to factors such as fluid impact angle, fluid morphology, impact velocity, target material properties, particle properties, environmental pressure and temperature. In the oil and gas industry, many flow-through equipment suffers from erosion damage under harsh working conditions. For example, the downhole pipe string and surface manifold of the gas storage reservoir under the working conditions of "strong extraction and strong injection", the surface high-pressure manifold in the fracturing process of the "well factory", or the key downhole tools and wellbore in ultra-deep well drilling. The environmental conditions, flow parameters and flow media of these equipment are very different. The existing erosion test research often only focuses on the erosion behavior under specific multiphase flow (gas-solid or liquid-solid) conditions. It is difficult to reproduce the complex erosion phenomenon under harsh working conditions (such as high temperature, high pressure, gas-solid-liquid three-phase flow), and it is impossible to use a single device to cover various actual complex working conditions, so it is difficult to guide on-site safety prevention and control. In addition, most of the existing erosion test devices use jet erosion to conduct erosion tests on flat specimens. This test method cannot consider the influence of the geometric structure of the pipe on the erosion results. In view of this situation, although some scholars have proposed a loop-type erosion test device, the existing devices of this type still have the problem that it is difficult to further process the test results of the eroded pipes.

[0004] In view of the existing problems, it is urgent to propose a high-temperature and high-pressure multiphase flow erosion-corrosion test device and method that can reproduce different harsh working conditions, so as to truly simulate the erosion behavior of oil pipes under various complex working conditions. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a multiphase flow erosion corrosion test device and method in view of the deficiencies in the prior art.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a multiphase flow erosion corrosion test device, comprising: multiple gas tanks, multiple pressure regulating valves, a gas storage tank, a pressure reducing valve, an adjustable flow valve, a first heater, a first ball valve, a second ball valve, a second heater, a mud pump, a solid-liquid mixing tank, a third ball valve, a booster pump, a third heater, a fourth ball valve, a fifth ball valve, an erosion chamber, and a test pipeline. The multiple gas tanks are connected to the multiple pressure regulating valves through pipelines in a one-to-one correspondence, the multiple pressure regulating valves are connected to the gas storage tanks through pipelines, the gas storage tanks are connected to the pressure reducing valves through pipelines, the pressure reducing valves are connected to the adjustable flow valves through pipelines, and the adjustable flow valves are connected to the first A first heater is connected, the first heater is connected to the first ball valve through a pipeline; the second ball valve is connected to the second heater through a pipeline, the second heater is connected to the mud pump through a pipeline, and the mud pump is connected to the solid-liquid mixing tank through a pipeline; the third ball valve is connected to the booster pump through a pipeline, the booster pump is connected to the third heater through a pipeline, the third heater is connected to the fourth ball valve and the fifth ball valve through pipelines, respectively, the fourth ball valve and the fifth ball valve are connected to the erosion chamber and the test pipeline one by one; the third ball valve is connected to the first ball valve and the second ball valve through pipelines.

[0007] The beneficial effects of the technical solution of the present invention are: two erosion test modes are set, and the erosion medium can be used for erosion test through the combination of the erosion chamber and the test pipeline. It can cover erosion tests of different modes such as pure gas phase, liquid-solid two-phase, gas-liquid two-phase, gas-solid-liquid three-phase, etc., and can be carried out in complex high temperature and high pressure environments. It can reproduce the complex erosion phenomenon of petroleum pipe fittings under various harsh working conditions, provide technical support for on-site erosion prevention and control, and ensure the safe service of easily eroded petroleum pipe fittings in harsh environments.

[0008] Furthermore, the gas storage tank is connected to a cyclone separator, and the cyclone separator is respectively connected to the gas storage tank, the solid-liquid mixing tank, the erosion chamber and the test pipeline through pipelines.

[0009] The beneficial effect of adopting the above further technical solution is: the setting of the cyclone separator circulates the mixed gas into the gas storage tank, and circulates the sand-carrying liquid and liquid into the solid-liquid mixing tank, which is convenient for recycling the mixed gas, sand-carrying liquid and liquid, rationally utilizes resources and reduces costs.

[0010] Furthermore, the erosion chamber includes: a glass cover, a nozzle, a flat erosion sample, an adjustable angle erosion sample fixture, an erosion chamber outlet, and a camera. One end of the nozzle passes through the glass cover, one end of the nozzle and the camera are arranged corresponding to the flat erosion sample, the other end of the nozzle is connected to the fourth ball valve through a pipeline, the flat erosion sample is installed on the adjustable angle erosion sample fixture, the camera is located on the outside of the glass cover, and the erosion chamber outlet is connected to the glass cover.

[0011] The beneficial effects of adopting the above further technical solution are: the erosion medium is ejected from the nozzle, the flat erosion sample is mounted on the adjustable angle erosion sample fixture, the erosion process is visualized by using a high-pressure resistant aluminum silicon glass cover, and the erosion particle velocity can be measured by a camera. In the high-pressure erosion chamber, the erosion object is a flat erosion sample, and the impact angle can be adjusted, which is convenient for test personnel to construct an erosion mathematical model according to the test results.

[0012] Furthermore, a plurality of erosion measuring points are provided in the test pipeline, and the test pipeline includes: a straight pipe, an elbow, a manifold, a reducer, and a blind flange. The straight pipe is connected to the elbow through a flange, the elbow is connected to the first end of the manifold through a flange, the second end of the manifold is connected to the reducer through a flange, and the blind flange is installed at the third end of the manifold.

[0013] The beneficial effects of adopting the above further technical solution are: the test pipeline is composed of test elements such as straight pipes, elbows, manifolds, reducers, etc., covering the main vulnerable pipe geometry, different pipes are connected by flanges, one end of the manifold can be sealed with a blind flange to form a blind tee, and the entire test pipeline can change the shape of the pipe by removing the flange according to the test requirements. In the high-pressure pipeline, common petroleum pipe elements such as straight pipes, elbows, reducers, manifolds, etc. are set, which can be used to conduct physical tests on the erosion of pipes on site and obtain the erosion performance of pipes under actual working conditions on site.

[0014] Furthermore, the plurality of erosion measurement points are grooves, an erosion sample is arranged in the groove, and an ultrasonic probe is arranged outside the groove.

[0015] The beneficial effect of adopting the above further technical solution is that a large number of erosion measuring points are arranged in the test pipeline, at which the erosion samples are embedded in different test elements as erosion objects, and can be taken out after the test for post-processing analysis. An ultrasonic probe is fixedly installed outside the erosion measuring point, and the wall thickness change at the erosion measuring point position can be monitored online in situ during the erosion process.

[0016] Furthermore, the multiple gas tanks are carbon dioxide gas tanks, hydrogen sulfide gas tanks and methane gas tanks, the multiple pressure regulating valves are a first pressure regulating valve, a second pressure regulating valve and a third pressure regulating valve with built-in pressure gauges, the carbon dioxide gas tank is connected to the gas storage tank through the first pressure regulating valve, the hydrogen sulfide gas tank is connected to the gas storage tank through the second pressure regulating valve, the methane gas tank is connected to the gas storage tank through the third pressure regulating valve, the gas storage tank is equipped with a pressure gauge, and a water injection port and a sand injection port are provided on the solid-liquid mixing tank, and the water injection port and the sand injection port are both provided with needle valves.

[0017] The beneficial effects of adopting the above further technical solution are: the setting of carbon dioxide gas tanks, hydrogen sulfide gas tanks and methane gas tanks is convenient for covering erosion tests of different modes such as pure gas phase, liquid-solid two-phase, gas-liquid two-phase, gas-solid-liquid three-phase, etc., and is convenient for introducing different gases according to actual needs. The setting of the pressure regulating valve is convenient for adjusting the proportion of different gases introduced according to actual needs, and can reproduce the complex erosion phenomenon of oil pipe fittings under various harsh working conditions, provide technical support for on-site erosion prevention and control, and ensure the safe service of oil pipe fittings prone to erosion in harsh environments.

[0018] Furthermore, a first pressure gauge and a first flow meter are provided on the pipeline between the adjustable flow valve and the first heater, a second flow meter and a second pressure gauge are provided on the pipeline between the second heater and the mud pump, a third pressure gauge is provided on the pipeline between the booster pump and the third heater, a third flow meter is provided on the pipeline between the third heater and the fourth ball valve and the fifth ball valve, and the first heater, the second heater and the third heater all have their own thermometers.

[0019] The beneficial effects of adopting the above further technical solution are: the setting of pressure gauge, flow meter and thermometer is convenient for real-time monitoring of experimental pressure, flow and temperature, and convenient for adjusting pressure, flow and temperature according to actual needs, so as to improve the accuracy of experimental results. It can reproduce the complex erosion phenomenon of oil pipe fittings under various harsh working conditions, provide technical support for on-site erosion prevention and control, and ensure the safe service of erosion-prone oil pipe fittings in harsh environments.

[0020] Furthermore, the plurality of pressure regulating valves are connected to the gas storage tank via a first one-way valve, a second one-way valve is provided on the pipeline between the third ball valve and the first ball valve, and a third one-way valve is provided on the pipeline between the third ball valve and the second ball valve.

[0021] The beneficial effect of adopting the above further technical solution is: the setting of the one-way valve prevents the backflow of gas, liquid and sand-carrying liquid, and improves the stability and reliability of the experimental device.

[0022] In addition, the present invention also provides a multiphase flow erosion corrosion test method, based on any one of the multiphase flow erosion corrosion test devices described above, the multiphase flow erosion corrosion test method comprises:

[0023] Pure gas phase erosion corrosion test:

[0024] Close the second ball valve, and open the first ball valve, the third ball valve, the fourth ball valve, and the fifth ball valve;

[0025] Open multiple pressure regulating valves and fill the gas storage tank with mixed gas;

[0026] The mixed gas pressure is adjusted by a pressure reducing valve, and the mixed gas flow is adjusted by an adjustable flow valve;

[0027] Turning on the first heater to preheat the mixed gas;

[0028] Turn on the booster pump to pressurize the mixed gas;

[0029] Turning on the third heater to heat the mixed gas;

[0030] The mixed gas enters the erosion chamber and the test pipeline to carry out the erosion corrosion test;

[0031] Liquid-solid two-phase erosion corrosion test:

[0032] Close the first ball valve, and open the second ball valve, the third ball valve, the fourth ball valve, and the fifth ball valve;

[0033] Adding liquid and eroded solid particles into the solid-liquid mixing tank respectively to form a sand-carrying liquid;

[0034] Turn on the mud pump to suck out the sand-carrying liquid in the solid-liquid mixing tank;

[0035] Turn on the second heater to preheat the sand-carrying fluid;

[0036] Turn on the booster pump to pressurize the sand-carrying fluid;

[0037] Turn on the third heater to heat the sand-carrying liquid;

[0038] The sand-carrying liquid enters the erosion chamber and the test pipeline to carry out the erosion corrosion test;

[0039] Gas-liquid two-phase erosion corrosion test:

[0040] Open the first ball valve, the second ball valve, the third ball valve, the fourth ball valve and the fifth ball valve;

[0041] Adding liquid to the solid-liquid mixing tank;

[0042] Turn on the mud pump to suck out the liquid in the solid-liquid mixing tank;

[0043] Turning on the second heater to preheat the liquid;

[0044] Open multiple pressure regulating valves and fill the gas storage tank with mixed gas;

[0045] The mixed gas pressure is adjusted by a pressure reducing valve, and the mixed gas flow is adjusted by an adjustable flow valve;

[0046] Turning on the first heater to preheat the mixed gas;

[0047] Turn on the booster pump to pressurize the gas-liquid two-phase erosion medium;

[0048] Turning on the third heater to increase the temperature of the gas-liquid two-phase erosion medium;

[0049] The gas-liquid two-phase erosion medium enters the erosion chamber and the test pipeline to carry out the erosion corrosion test;

[0050] Gas-solid-liquid three-phase erosion-corrosion test:

[0051] Open the first ball valve, the second ball valve, the third ball valve, the fourth ball valve and the fifth ball valve;

[0052] Adding liquid and eroded solid particles into the solid-liquid mixing tank respectively to form a sand-carrying liquid;

[0053] Turn on the mud pump to suck out the sand-carrying liquid in the solid-liquid mixing tank;

[0054] Turn on the second heater to preheat the sand-carrying fluid;

[0055] Open multiple pressure regulating valves and fill the gas storage tank with mixed gas;

[0056] The mixed gas pressure is adjusted by a pressure reducing valve, and the mixed gas flow is adjusted by an adjustable flow valve;

[0057] Turning on the first heater to preheat the mixed gas;

[0058] Turn on the booster pump to pressurize the gas-liquid-solid three-phase erosion medium;

[0059] Turning on the third heater to increase the temperature of the gas-liquid-solid three-phase erosion medium;

[0060] The gas-liquid-solid three-phase erosion medium enters the erosion chamber and the test pipeline to carry out the erosion corrosion test.

[0061] The beneficial effects of the technical solution of the present invention are: two erosion test modes are set, and the erosion medium can be used for erosion test through the combination of the erosion chamber and the test pipeline. It can cover erosion tests of different modes such as pure gas phase, liquid-solid two-phase, gas-liquid two-phase, gas-solid-liquid three-phase, etc., and can be carried out in complex high temperature and high pressure environments. It can reproduce the complex erosion phenomenon of petroleum pipe fittings under various harsh working conditions, provide technical support for on-site erosion prevention and control, and ensure the safe service of easily eroded petroleum pipe fittings in harsh environments.

[0062] Furthermore, during the pure gas phase erosion corrosion test: the cyclone separator is opened, and the mixed gas is circulated into the gas storage tank;

[0063] During the liquid-solid two-phase erosion corrosion test: open the cyclone separator and circulate the sand-carrying liquid into the solid-liquid mixing tank;

[0064] During the gas-liquid two-phase erosion corrosion test: open the cyclone separator, circulate the mixed gas in the gas-liquid two-phase erosion medium into the gas storage tank, and circulate the liquid in the gas-liquid two-phase erosion medium into the solid-liquid mixing tank;

[0065] During the gas-solid-liquid three-phase erosion corrosion test: open the cyclone separator, circulate the mixed gas in the gas-liquid-solid three-phase erosion medium into the gas storage tank, and circulate the sand-carrying liquid in the gas-liquid two-phase erosion medium into the solid-liquid mixing tank.

[0066] The beneficial effect of adopting the above further technical scheme is: the mixed gas is circulated into the gas storage tank through the cyclone separator, and the sand-carrying liquid and liquid are circulated into the solid-liquid mixing tank through the cyclone separator, so as to facilitate the recycling of the mixed gas, sand-carrying liquid and liquid, rationally utilize resources and reduce costs.

[0067] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 A schematic structural diagram of a multiphase flow erosion-corrosion testing device provided in an embodiment of the present invention.

[0069] Figure 2 A schematic diagram of the structure of an erosion chamber provided in an embodiment of the present invention.

[0070] Figure 3 This is one of the structural schematic diagrams of the test pipeline provided in the embodiment of the present invention.

[0071] Figure 4 The second structural schematic diagram of the test pipeline provided in the embodiment of the present invention.

[0072] Description of the accompanying drawings: 1. Carbon dioxide gas tank; 2. Hydrogen sulfide gas tank; 3. Methane gas tank; 4. First pressure regulating valve; 5. Second pressure regulating valve; 6. Third pressure regulating valve; 7. First check valve; 8. Gas storage tank; 9. Pressure reducing valve; 10. Adjustable flow valve; 11. First pressure gauge; 12. First flow meter; 13. First heater; 14. First ball valve; 15. Second check valve; 16. Third check valve; 17. Second ball valve; 18. Second heater; 19. Second flow meter; 20. Second pressure gauge; 21. Mud pump; 22. Solid-liquid mixing tank; 23. Water injection port; 2 4. Sand injection port; 25. Third ball valve; 26. Booster pump; 27. Third pressure gauge; 28. Third heater; 29. ​​Third flow meter; 30. Fourth ball valve; 31. Fifth ball valve; 32. Erosion chamber; 33. Test pipeline; 34. Cyclone separator; 35. Glass cover; 36. Nozzle; 37. Flat erosion specimen; 38. Adjustable angle erosion specimen fixture; 39. Erosion chamber outlet; 40. Camera; 41. Straight pipe; 42. Elbow; 43. Manifold; 44. Reducer; 45. Flange; 46. Blind flange; 47. Erosion specimen; 48. Ultrasonic probe. DETAILED DESCRIPTION

[0073] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0074] like Figures 1 to 4As shown, an embodiment of the present invention provides a multiphase flow erosion corrosion test device, including: multiple gas tanks, multiple pressure regulating valves, a gas storage tank 8, a pressure reducing valve 9, an adjustable flow valve 10, a first heater 13, a first ball valve 14, a second ball valve 17, a second heater 18, a mud pump 21, a solid-liquid mixing tank 22, a third ball valve 25, a booster pump 26, a third heater 28, a fourth ball valve 30, a fifth ball valve 31, an erosion cavity 32, and a test pipeline 33. The multiple gas tanks are connected to the multiple pressure regulating valves through pipelines in a one-to-one correspondence, the multiple pressure regulating valves are connected to the gas storage tank 8 through pipelines, the gas storage tank 8 is connected to the pressure reducing valve 9 through pipelines, the pressure reducing valve 9 is connected to the adjustable flow valve 10 through pipelines, and the adjustable flow valve 10 is connected to the first heater 13 through pipelines. The first heater 13 is connected to the first ball valve 14 through a pipeline; the second ball valve 17 is connected to the second heater 18 through a pipeline, the second heater 18 is connected to the mud pump 21 through a pipeline, and the mud pump 21 is connected to the solid-liquid mixing tank 22 through a pipeline; the third ball valve 25 is connected to the booster pump 26 through a pipeline, the booster pump 26 is connected to the third heater 28 through a pipeline, the third heater 28 is connected to the fourth ball valve 30 and the fifth ball valve 31 through pipelines, respectively, the fourth ball valve 30 and the fifth ball valve 31 are connected to the erosion cavity 32 and the test pipeline 33 one by one; the third ball valve 25 is connected to the first ball valve 14 and the second ball valve 17 through pipelines.

[0075] The beneficial effects of the technical solution of the present invention are: two erosion test modes are set, and the erosion medium can be used for erosion test through the combination of the erosion chamber and the test pipeline. It can cover erosion tests of different modes such as pure gas phase, liquid-solid two-phase, gas-liquid two-phase, gas-solid-liquid three-phase, etc., and can be carried out in complex high temperature and high pressure environments. It can reproduce the complex erosion phenomenon of petroleum pipe fittings under various harsh working conditions, provide technical support for on-site erosion prevention and control, and ensure the safe service of easily eroded petroleum pipe fittings in harsh environments.

[0076] like Figures 1 to 4 As shown, further, the gas storage tank 8 is connected to a cyclone separator 34, and the cyclone separator 34 is respectively connected to the gas storage tank 8, the solid-liquid mixing tank 22, the erosion chamber 32 and the test pipeline 33 through pipelines.

[0077] The beneficial effect of adopting the above further technical solution is: the setting of the cyclone separator circulates the mixed gas into the gas storage tank, and circulates the sand-carrying liquid and liquid into the solid-liquid mixing tank, which is convenient for recycling the mixed gas, sand-carrying liquid and liquid, rationally utilizes resources and reduces costs.

[0078] like Figures 1 to 4As shown, further, the erosion chamber 32 includes: a glass cover 35, a nozzle 36, a flat erosion sample 37, an adjustable angle erosion sample fixture 38, an erosion chamber outlet 39, and a camera 40. One end of the nozzle 36 passes through the glass cover 35, one end of the nozzle 36 and the camera 40 are correspondingly arranged with the flat erosion sample 37, the other end of the nozzle 36 is connected to the fourth ball valve 30 through a pipeline, the flat erosion sample 37 is installed on the adjustable angle erosion sample fixture 38, the camera 40 is located on the outside of the glass cover 35, and the erosion chamber outlet 39 is connected with the glass cover 35.

[0079] The beneficial effects of adopting the above further technical solution are: the erosion medium is ejected from the nozzle, the flat erosion sample is mounted on the adjustable angle erosion sample fixture, the erosion process is visualized by using a high-pressure resistant aluminum silicon glass cover, and the erosion particle velocity can be measured by a camera. In the high-pressure erosion chamber, the erosion object is a flat erosion sample, and the impact angle can be adjusted, which is convenient for test personnel to construct an erosion mathematical model according to the test results.

[0080] like Figures 1 to 4 As shown, further, a plurality of erosion measuring points are provided in the test pipeline, and the test pipeline 33 includes: a straight pipe 41, an elbow 42, a manifold 43, a reducer 44, and a blind flange 46. The straight pipe 41 is connected to the elbow 42 through a flange 45, the elbow 42 is connected to a first end of the manifold 43 through a flange 45, the second end of the manifold 43 is connected to the reducer 44 through a flange 45, and the blind flange 46 is installed at the third end of the manifold 43.

[0081] The beneficial effects of adopting the above further technical solution are: the test pipeline is composed of test elements such as straight pipes, elbows, manifolds, reducers, etc., covering the main vulnerable pipe geometry, different pipes are connected by flanges, one end of the manifold can be sealed with a blind flange to form a blind tee, and the entire test pipeline can change the shape of the pipe by removing the flange according to the test requirements. In the high-pressure pipeline, common petroleum pipe elements such as straight pipes, elbows, reducers, manifolds, etc. are set, which can be used to conduct physical tests on the erosion of pipes on site and obtain the erosion performance of pipes under actual working conditions on site.

[0082] like Figures 1 to 4 As shown, further, the plurality of erosion measuring points are grooves, an erosion sample 47 is provided in the groove, and an ultrasonic probe 48 is provided on the outside of the groove.

[0083] The beneficial effect of adopting the above further technical solution is that a large number of erosion measuring points are arranged in the test pipeline, at which the erosion samples are embedded in different test elements as erosion objects, and can be taken out after the test for post-processing analysis. An ultrasonic probe is fixedly installed outside the erosion measuring point, and the wall thickness change at the erosion measuring point position can be monitored online in situ during the erosion process.

[0084] Among them, the ultrasonic probe arranged outside the erosion measuring point can be replaced by other damage-free inspection components, such as magnetic flux leakage probe, electromagnetic ultrasonic probe and magnetic memory probe.

[0085] like Figures 1 to 4 As shown, further, the multiple gas tanks are a carbon dioxide gas tank 1, a hydrogen sulfide gas tank 2 and a methane gas tank 3, and the multiple pressure regulating valves are a first pressure regulating valve 4, a second pressure regulating valve 5 and a third pressure regulating valve 6 with built-in pressure gauges. The carbon dioxide gas tank 1 is connected to the gas storage tank 8 through the first pressure regulating valve 4, the hydrogen sulfide gas tank 2 is connected to the gas storage tank 8 through the second pressure regulating valve 5, the methane gas tank 3 is connected to the gas storage tank 8 through the third pressure regulating valve 6, the gas storage tank 8 is equipped with a pressure gauge, and a water injection port 23 and a sand injection port 24 are provided on the solid-liquid mixing tank 22, and the water injection port 23 and the sand injection port 24 are both provided with needle valves.

[0086] The beneficial effects of adopting the above further technical solution are: the setting of carbon dioxide gas tanks, hydrogen sulfide gas tanks and methane gas tanks is convenient for covering erosion tests of different modes such as pure gas phase, liquid-solid two-phase, gas-liquid two-phase, gas-solid-liquid three-phase, etc., and is convenient for introducing different gases according to actual needs. The setting of the pressure regulating valve is convenient for adjusting the proportion of different gases introduced according to actual needs, and can reproduce the complex erosion phenomenon of oil pipe fittings under various harsh working conditions, provide technical support for on-site erosion prevention and control, and ensure the safe service of oil pipe fittings prone to erosion in harsh environments.

[0087] like Figures 1 to 4 As shown, further, a first pressure gauge 11 and a first flow meter 12 are provided on the pipeline between the adjustable flow valve 10 and the first heater 13, a second flow meter 19 and a second pressure gauge 20 are provided on the pipeline between the second heater 18 and the mud pump 21, a third pressure gauge 27 is provided on the pipeline between the booster pump 26 and the third heater 28, a third flow meter 29 is provided on the pipeline between the third heater 28 and the fourth ball valve 30 and the fifth ball valve 31, and the first heater 13, the second heater 18 and the third heater 28 are all equipped with thermometers.

[0088] The beneficial effects of adopting the above further technical solution are: the setting of pressure gauge, flow meter and thermometer is convenient for real-time monitoring of experimental pressure, flow and temperature, and convenient for adjusting pressure, flow and temperature according to actual needs, so as to improve the accuracy of experimental results. It can reproduce the complex erosion phenomenon of oil pipe fittings under various harsh working conditions, provide technical support for on-site erosion prevention and control, and ensure the safe service of erosion-prone oil pipe fittings in harsh environments.

[0089] like Figures 1 to 4 As shown, further, the multiple pressure regulating valves are connected to the gas storage tank 8 through the first one-way valve 7, a second one-way valve 15 is provided on the pipeline between the third ball valve 25 and the first ball valve 14, and a third one-way valve 16 is provided on the pipeline between the third ball valve 25 and the second ball valve 17.

[0090] The beneficial effect of adopting the above further technical solution is: the setting of the one-way valve prevents the backflow of gas, liquid and sand-carrying liquid, and improves the stability and reliability of the experimental device.

[0091] 1. A multiphase flow erosion corrosion test device provided by the present invention can be a high-temperature and high-pressure multiphase flow erosion corrosion test device, comprising: a CO2 gas tank (carbon dioxide gas tank 1), an H2S gas tank (hydrogen sulfide gas tank 2), a CH4 gas tank (methane gas tank 3), a pressure regulating valve 1 with a pressure gauge (a first pressure regulating valve 4), a pressure regulating valve 2 with a pressure gauge (a second pressure regulating valve 5), a pressure regulating valve 3 with a pressure gauge (a third pressure regulating valve 6), a check valve 1 (a first check valve 7), a high-pressure gas storage tank (gas storage tank 8) with a pressure gauge, a pressure reducing valve 9, an adjustable flow valve 10, a pressure gauge 1 (a first pressure gauge 11), a flow meter 1 (a first flow meter 12), a heater 1 with a thermometer (a first heater 13), a ball valve 1 (a first ball valve 14), a check valve 2 (a second check valve 15), a pressure regulating valve 3 (a third pressure regulating valve 6), a pressure regulating valve 1 (a first check valve 7), a high-pressure gas storage tank (gas storage tank 8) with a pressure gauge, a pressure reducing valve 9, an adjustable flow valve 10, a pressure gauge 1 (a first pressure gauge 11), a flow meter 1 (a first flow meter 12), a heater 1 with a thermometer (a first heater 13), a ball valve 1 (a first ball valve 14), a check valve 2 (a second check valve 1 5), one-way valve three (third one-way valve 16), ball valve two (second ball valve 17), heater two with thermometer (second heater 18), flow meter two (second flow meter 19), pressure gauge two (second pressure gauge 20), high-pressure mud pump (mud pump 21), high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22), water injection port 23 with high-pressure needle valve, sand injection port 24 with high-pressure needle valve, ball valve three (third ball valve 25), booster pump 26, pressure gauge three (third pressure gauge 27), heater three with thermometer (third heater 28), flow meter three (third flow meter 29), ball valve four (fourth ball valve 30), ball valve five (fifth ball valve 31), high-pressure erosion chamber (erosion chamber 32), high-pressure pipeline (test pipeline 33), cyclone separator 34.

[0092] 2. The present invention provides two erosion (erosion corrosion) test modes, and the erosion medium can be used to perform erosion tests through a combination of a high-pressure erosion chamber (erosion chamber 32) and a high-pressure pipeline (test pipeline 33).

[0093] 3. The high-pressure erosion chamber is composed of a high-pressure resistant aluminum-silicon glass cover (glass cover 35), a nozzle 36, a flat erosion sample 37, an adjustable angle erosion sample fixture 38, an erosion chamber outlet 39, and a high-speed camera (camera 40). The erosion medium is ejected from the nozzle 36, and the flat erosion sample 37 is mounted on the adjustable angle erosion sample fixture 38. The high-pressure resistant aluminum-silicon glass cover is used to visualize the erosion process, and the erosion particle velocity can be measured by the high-speed camera.

[0094] 4. The high-pressure pipeline (test pipeline 33) is composed of test elements such as straight pipes 41, elbows 42, manifolds 43, reducers 44, etc., covering the main geometric shapes of vulnerable pipes. Different pipes are connected by high-pressure flanges (flanges 45). One end of the manifold can be sealed with a blind flange 46 to form a blind tee. The shape of the entire high-pressure pipeline (test pipeline 33) can be changed by disassembling the flange according to test requirements.

[0095] 5. A large number of erosion measuring points are arranged in the high-pressure pipeline (test pipeline 33). At the erosion measuring points, erosion samples 47 are embedded in different test elements as erosion objects, which can be taken out after the test to facilitate post-processing analysis.

[0096] 6. An ultrasonic probe 48 is fixedly installed outside the erosion measuring point, which can perform online in-situ monitoring of the wall thickness change at the erosion measuring point during the erosion process.

[0097] In addition, the present invention also provides a multiphase flow erosion corrosion test method, based on any one of the multiphase flow erosion corrosion test devices described above, the multiphase flow erosion corrosion test method comprises:

[0098] Pure gas phase erosion corrosion test:

[0099] Close the second ball valve, and open the first ball valve, the third ball valve, the fourth ball valve, and the fifth ball valve;

[0100] Open multiple pressure regulating valves and fill the gas storage tank with mixed gas;

[0101] The mixed gas pressure is adjusted by a pressure reducing valve, and the mixed gas flow is adjusted by an adjustable flow valve;

[0102] Turning on the first heater to preheat the mixed gas;

[0103] Turn on the booster pump to pressurize the mixed gas;

[0104] Turning on the third heater to heat the mixed gas;

[0105] The mixed gas enters the erosion chamber and the test pipeline to carry out the erosion corrosion test;

[0106] Liquid-solid two-phase erosion corrosion test:

[0107] Close the first ball valve, and open the second ball valve, the third ball valve, the fourth ball valve, and the fifth ball valve;

[0108] Adding liquid and eroded solid particles into the solid-liquid mixing tank respectively to form a sand-carrying liquid;

[0109] Turn on the mud pump to suck out the sand-carrying liquid in the solid-liquid mixing tank;

[0110] Turn on the second heater to preheat the sand-carrying fluid;

[0111] Turn on the booster pump to pressurize the sand-carrying fluid;

[0112] Turn on the third heater to heat the sand-carrying liquid;

[0113] The sand-carrying liquid enters the erosion chamber and the test pipeline to carry out the erosion corrosion test;

[0114] Gas-liquid two-phase erosion corrosion test:

[0115] Open the first ball valve, the second ball valve, the third ball valve, the fourth ball valve and the fifth ball valve;

[0116] Adding liquid to the solid-liquid mixing tank;

[0117] Turn on the mud pump to suck out the liquid in the solid-liquid mixing tank;

[0118] Turning on the second heater to preheat the liquid;

[0119] Open multiple pressure regulating valves and fill the gas storage tank with mixed gas;

[0120] The mixed gas pressure is adjusted by a pressure reducing valve, and the mixed gas flow is adjusted by an adjustable flow valve;

[0121] Turning on the first heater to preheat the mixed gas;

[0122] Turn on the booster pump to pressurize the gas-liquid two-phase erosion medium;

[0123] Turning on the third heater to increase the temperature of the gas-liquid two-phase erosion medium;

[0124] The gas-liquid two-phase erosion medium enters the erosion chamber and the test pipeline to carry out the erosion corrosion test;

[0125] Gas-solid-liquid three-phase erosion-corrosion test:

[0126] Open the first ball valve, the second ball valve, the third ball valve, the fourth ball valve and the fifth ball valve;

[0127] Adding liquid and eroded solid particles into the solid-liquid mixing tank respectively to form a sand-carrying liquid;

[0128] Turn on the mud pump to suck out the sand-carrying liquid in the solid-liquid mixing tank;

[0129] Turn on the second heater to preheat the sand-carrying fluid;

[0130] Open multiple pressure regulating valves and fill the gas storage tank with mixed gas;

[0131] The mixed gas pressure is adjusted by a pressure reducing valve, and the mixed gas flow is adjusted by an adjustable flow valve;

[0132] Turning on the first heater to preheat the mixed gas;

[0133] Turn on the booster pump to pressurize the gas-liquid-solid three-phase erosion medium;

[0134] Turning on the third heater to increase the temperature of the gas-liquid-solid three-phase erosion medium;

[0135] The gas-liquid-solid three-phase erosion medium enters the erosion chamber and the test pipeline to carry out the erosion corrosion test.

[0136] The beneficial effects of the technical solution of the present invention are: two erosion test modes are set, and the erosion medium can be used for erosion test through the combination of the erosion chamber and the test pipeline. It can cover erosion tests of different modes such as pure gas phase, liquid-solid two-phase, gas-liquid two-phase, gas-solid-liquid three-phase, etc., and can be carried out in complex high temperature and high pressure environments. It can reproduce the complex erosion phenomenon of petroleum pipe fittings under various harsh working conditions, provide technical support for on-site erosion prevention and control, and ensure the safe service of easily eroded petroleum pipe fittings in harsh environments.

[0137] Furthermore, during the pure gas phase erosion corrosion test: the cyclone separator is opened, and the mixed gas is circulated into the gas storage tank;

[0138] During the liquid-solid two-phase erosion corrosion test: open the cyclone separator and circulate the sand-carrying liquid into the solid-liquid mixing tank;

[0139] During the gas-liquid two-phase erosion corrosion test: open the cyclone separator, circulate the mixed gas in the gas-liquid two-phase erosion medium into the gas storage tank, and circulate the liquid in the gas-liquid two-phase erosion medium into the solid-liquid mixing tank;

[0140] During the gas-solid-liquid three-phase erosion corrosion test: open the cyclone separator, circulate the mixed gas in the gas-liquid-solid three-phase erosion medium into the gas storage tank, and circulate the sand-carrying liquid in the gas-liquid two-phase erosion medium into the solid-liquid mixing tank.

[0141] The beneficial effect of adopting the above further technical scheme is: the mixed gas is circulated into the gas storage tank through the cyclone separator, and the sand-carrying liquid and liquid are circulated into the solid-liquid mixing tank through the cyclone separator, so as to facilitate the recycling of the mixed gas, sand-carrying liquid and liquid, rationally utilize resources and reduce costs.

[0142] The present invention can carry out erosion tests under various flow modes (pure gas phase, liquid-solid two-phase, gas-liquid two-phase, gas-liquid-solid three-phase, etc.) according to different service conditions of petroleum pipe fittings. The specific implementation steps of different modes are as follows:

[0143] a. Pure gas erosion:

[0144] 1) Close ball valve 2 (second ball valve 17), and open ball valve 1 (first ball valve 14), ball valve 3 (third ball valve 25), ball valve 4 (fourth ball valve 30), and ball valve 5 (fifth ball valve 31) respectively;

[0145] 2) Open the pressure regulating valve 1 (first pressure regulating valve 4), the pressure regulating valve 2 (second pressure regulating valve 5), and the pressure regulating valve 3 (third pressure regulating valve 6) respectively, and fill the mixed gas into the high-pressure gas storage tank (gas storage tank 8) according to the preset ratio;

[0146] 3) Open the pressure reducing valve 9 and adjust the adjustable flow valve 10. The gas pressure and flow information in the pipe can be obtained through the pressure gauge 1 (the first pressure gauge 11) and the flow gauge 1 (the first flow gauge 12);

[0147] 4) Turn on heater 1 (first heater 13) to preheat the gas in the tube;

[0148] 6) Turn on and adjust the booster pump 26 to pressurize the mixed gas, and the pressure is shown by the pressure gauge 3 (the third pressure gauge 27);

[0149] 7) Turn on the third heater (the third heater 28) to heat the mixed gas in the tube;

[0150] 8) The mixed gas enters the high-pressure erosion chamber (erosion chamber 32) and the high-pressure combination pipeline (test pipeline 33) respectively to perform an erosion test;

[0151] 9) After passing through the test area, the gas in the pipe passes through the cyclone separator 34 and enters the high-pressure gas storage tank (gas storage tank 8), forming a pipeline circulation.

[0152] b. Liquid-solid two-phase erosion:

[0153] 1) Close ball valve 1 (first ball valve 14), and open ball valve 2 (second ball valve 17), ball valve 3 (third ball valve 25), ball valve 4 (fourth ball valve 30), and ball valve 5 (fifth ball valve 31);

[0154] 2) Fill the high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22) with water through the water injection port 23;

[0155] 3) Add erosion solid particles into the high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22) through the sand injection port 24 according to the test proportion requirements and mix them thoroughly;

[0156] 4) Turn on the high-pressure mud pump (mud pump 21) to suck the sand-carrying liquid out of the high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22), and read its flow rate and pressure from the second flow meter (second flow meter 19) and the second pressure meter (second pressure meter 20) respectively;

[0157] 5) Turn on the second heater (second heater 18) to preheat the sand-carrying liquid in the pipe;

[0158] 6) Turn on and adjust the booster pump 26 to pressurize the sand-carrying liquid in the pipe, and the pressure is shown by the pressure gauge 3 (the third pressure gauge 27);

[0159] 7) Turn on the third heater (the third heater 28) to heat the sand-carrying liquid in the tube;

[0160] 8) The sand-carrying liquid enters the high-pressure erosion chamber (erosion chamber 32) and the high-pressure combined pipeline (test pipeline 33) respectively to carry out the erosion test;

[0161] 9) After the sand-carrying liquid passes through the test area, it passes through the cyclone separator 34 and enters the high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22) to form a pipeline circulation.

[0162] c. Gas-liquid two-phase erosion;

[0163] 1) Open ball valve 1 (first ball valve 14), ball valve 2 (second ball valve 17), ball valve 3 (third ball valve 25), ball valve 4 (fourth ball valve 30), and ball valve 5 (fifth ball valve 31) respectively;

[0164] 2) Fill the high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22) with water through the water injection port (23);

[0165] 3) Turn on the high-pressure mud pump (mud pump 21) to suck the liquid out of the high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22), and read the flow rate and pressure from the second flow meter (second flow meter 19) and the second pressure meter (second pressure meter 20) respectively;

[0166] 4) Turn on the second heater (second heater 18) to preheat the liquid in the tube;

[0167] 5) Open the pressure regulating valve 1 (first pressure regulating valve 4), the pressure regulating valve 2 (second pressure regulating valve 5), and the pressure regulating valve 3 (third pressure regulating valve 6) respectively, and fill the mixed gas into the high-pressure gas storage tank (gas storage tank 8);

[0168] 6) Open the pressure reducing valve 9 and adjust the adjustable flow valve 10. The gas pressure and flow information in the pipe can be obtained through the pressure gauge 1 (the first pressure gauge 11) and the flow gauge 1 (the first flow gauge 12);

[0169] 7) Turn on heater 1 (first heater 13) to preheat the gas in the tube;

[0170] 8) Turn on and adjust the booster pump 26 to pressurize the gas-liquid two-phase erosion medium in the pipe, and the pressure is shown by the pressure gauge 3 (the third pressure gauge 27);

[0171] 9) Turn on the third heater (the third heater 28) to heat the gas-liquid two-phase erosion medium in the tube;

[0172] 10) The gas-liquid two-phase erosion medium in the tube enters the high-pressure erosion chamber (erosion chamber 32) and the high-pressure combined pipeline (test pipeline 33) respectively to carry out the erosion test;

[0173] 11) After the gas-liquid two-phase erosion medium in the pipe passes through the test area, it passes through the cyclone separator 34, the gas enters the high-pressure gas storage tank (gas storage tank 8), and the liquid enters the high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22), forming a pipeline circulation.

[0174] d. Gas-solid-liquid three-phase erosion;

[0175] 1) Open ball valve 1 (first ball valve 14), ball valve 2 (second ball valve 17), ball valve 3 (third ball valve 25), ball valve 4 (fourth ball valve 30), and ball valve 5 (fifth ball valve 31) respectively;

[0176] 2) Fill the high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22) with water through the water injection port 23;

[0177] 3) Add erosion solid particles into the high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22) through the sand injection port 24 according to the test proportion requirements and mix them thoroughly;

[0178] 4) Turn on the high-pressure mud pump (mud pump 21) to suck the sand-carrying liquid out of the high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22), and read its flow rate and pressure from the second flow meter (second flow meter 19) and the second pressure meter (second pressure meter 20) respectively;

[0179] 5) Turn on the second heater (second heater 18) to preheat the sand-carrying liquid in the pipe;

[0180] 6) Open the pressure regulating valve 1 (first pressure regulating valve 4), the pressure regulating valve 2 (second pressure regulating valve 5), and the pressure regulating valve 3 (third pressure regulating valve 6) respectively, and fill the mixed gas into the high-pressure gas storage tank (gas storage tank 8);

[0181] 7) Open the pressure reducing valve 9 and adjust the adjustable flow valve 10. The gas pressure and flow information in the pipe can be obtained through the pressure gauge 1 (the first pressure gauge 11) and the flow gauge 1 (the first flow gauge 12);

[0182] 8) Turn on heater 1 (first heater 13) to preheat the gas in the tube;

[0183] 9) Turn on and adjust the booster pump 26 to pressurize the gas-liquid-solid three-phase erosion medium in the pipe, and the pressure is shown by the pressure gauge 3 (the third pressure gauge 27);

[0184] 10) Turn on the third heater (the third heater 28) to heat up the gas-liquid-solid three-phase erosion medium in the tube;

[0185] 11) The gas-liquid-solid three-phase erosion medium in the tube enters the high-pressure erosion chamber (erosion chamber 32) and the high-pressure combined pipeline (test pipeline 33) respectively to carry out the erosion test;

[0186] 12) After the gas-liquid-solid three-phase erosion medium in the pipe passes through the test area, it passes through the cyclone separator 34, the gas enters the high-pressure gas storage tank (gas storage tank 8), and the sand-carrying liquid enters the high-pressure solid-liquid mixing tank (solid-liquid mixing tank 22), forming a pipeline circulation.

[0187] The adjustable test parameters include: gas composition, gas flow rate, liquid flow rate, particle concentration, particle size, operating pressure, ambient temperature, impact angle, sample material, etc.

[0188] Existing erosion test devices can generally only carry out erosion tests under specific multiphase flow conditions, while the multiphase flow erosion corrosion test device provided by the present invention can carry out erosion tests of different modes such as pure gas phase, liquid-solid two-phase, gas-liquid two-phase, gas-solid-liquid three-phase, etc. by adopting different test processes; in addition, the present device can be used to carry out erosion tests under high temperature and high pressure complex environments to reproduce the actual severe working conditions on site; the present invention sets up two erosion test modes, and the erosion medium can be used to carry out erosion tests through a combination of a high-pressure erosion chamber (erosion chamber) and a high-pressure pipeline (test pipeline). In the high-pressure erosion chamber, the erosion object is a flat plate erosion specimen, and the impact angle can be adjusted, which is convenient for the test personnel to construct an erosion mathematical model according to the test results. In the high-pressure pipeline, common petroleum pipe components such as straight pipes, elbows, reducers, manifolds, etc. are provided, and the erosion conditions of the pipe fittings on site can be physically tested to obtain the erosion performance of the pipe fittings under actual working conditions on site.

[0189] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multiphase flow erosion corrosion test device, characterized in that: include: A plurality of gas tanks, a plurality of pressure regulating valves, a gas storage tank (8), a pressure reducing valve (9), an adjustable flow valve (10), a first heater (13), a first ball valve (14), a second ball valve (17), a second heater (18), a mud pump (21), a solid-liquid mixing tank (22), a third ball valve (25), a booster pump (26), a third heater (28), a fourth ball valve (30), a fifth ball valve (31), an erosion chamber (32), and a test pipeline (33); the plurality of gas tanks are connected to the plurality of pressure regulating valves in a one-to-one correspondence through pipelines; the plurality of pressure regulating valves are connected to the gas storage tank (8) through pipelines; the gas storage tank (8) is connected to the pressure reducing valve (9) through pipelines; the pressure reducing valve (9) is connected to the adjustable flow valve (10) through pipelines; the adjustable flow valve (10) is connected to the first heater (13) through pipelines; the first heater (13) is connected to the first heater (13) through pipelines; The first ball valve (14) is connected to the first ball valve (14) through a pipeline; the second ball valve (17) is connected to the second heater (18) through a pipeline, the second heater (18) is connected to the mud pump (21) through a pipeline, and the mud pump (21) is connected to the solid-liquid mixing tank (22) through a pipeline; the third ball valve (25) is connected to the booster pump (26) through a pipeline, the booster pump (26) is connected to the third heater (28) through a pipeline, the third heater (28) is connected to the fourth ball valve (30) and the fifth ball valve (31) through pipelines, respectively, the fourth ball valve (30) and the fifth ball valve (31) are connected to the erosion chamber (32) and the test pipeline (33) in a one-to-one correspondence; the third ball valve (25) is connected to the first ball valve (14) and the second ball valve (17) through pipelines, respectively.

2. A multiphase flow erosion corrosion test device according to claim 1, characterized in that: The gas storage tank (8) is connected to a cyclone separator (34), and the cyclone separator (34) is respectively connected to the gas storage tank (8), the solid-liquid mixing tank (22), the erosion chamber (32) and the test pipeline (33) through pipelines.

3. The multiphase flow erosion corrosion test device according to claim 1, characterized in that: The erosion chamber (32) comprises: a glass cover (35), a nozzle (36), a flat erosion sample (37), an adjustable angle erosion sample fixture (38), an erosion chamber outlet (39), and a camera (40); one end of the nozzle (36) passes through the glass cover (35); one end of the nozzle (36) and the camera (40) are arranged corresponding to the flat erosion sample (37); the other end of the nozzle (36) is connected to the fourth ball valve (30) through a pipeline; the flat erosion sample (37) is mounted on the adjustable angle erosion sample fixture (38); the camera (40) is located outside the glass cover (35); and the erosion chamber outlet (39) is connected to the glass cover (35).

4. The multiphase flow erosion corrosion test device according to claim 1, characterized in that: The test pipeline is provided with a plurality of erosion measuring points. The test pipeline (33) comprises: a straight pipe (41), an elbow (42), a manifold (43), a reducer (44), and a blind flange (46). The straight pipe is connected to the elbow (42) via a flange, the elbow (42) is connected to a first end of the manifold (43) via a flange, the second end of the manifold (43) is connected to the reducer (44) via a flange, and the blind flange (46) is installed at a third end of the manifold (43).

5. A multiphase flow erosion corrosion test device according to claim 4, characterized in that: The plurality of erosion measurement points are grooves, an erosion sample (47) is arranged in the groove, and an ultrasonic probe (48) is arranged outside the groove.

6. The multiphase flow erosion corrosion test device according to claim 1, characterized in that: The plurality of gas tanks are carbon dioxide gas tanks (1), hydrogen sulfide gas tanks (2) and methane gas tanks (3); the plurality of pressure regulating valves are a first pressure regulating valve (4), a second pressure regulating valve (5) and a third pressure regulating valve (6) with built-in pressure gauges; the carbon dioxide gas tank (1) is connected to the gas storage tank (8) via the first pressure regulating valve (4); the hydrogen sulfide gas tank (2) is connected to the gas storage tank (8) via the second pressure regulating valve (5); the methane gas tank (3) is connected to the gas storage tank (8) via the third pressure regulating valve (6); the gas storage tank (8) is built-in with a pressure gauge; the solid-liquid mixing tank (22) is provided with a water injection port (23) and a sand injection port (24); the water injection port (23) and the sand injection port (24) are both provided with needle valves.

7. The multiphase flow erosion corrosion test device according to claim 1, characterized in that: A first pressure gauge (11) and a first flow meter (12) are provided on the pipeline between the adjustable flow valve (10) and the first heater (13); a second flow meter (19) and a second pressure gauge (20) are provided on the pipeline between the second heater (18) and the mud pump (21); a third pressure gauge (27) is provided on the pipeline between the booster pump (26) and the third heater (28); a third flow meter (29) is provided on the pipeline between the third heater (28) and the fourth ball valve (30) and the fifth ball valve (31); the first heater (13), the second heater (18) and the third heater (28) are all provided with thermometers.

8. The multiphase flow erosion corrosion test device according to claim 1, characterized in that: The plurality of pressure regulating valves are connected to the gas storage tank (8) via a first one-way valve (7); a second one-way valve (15) is provided on the pipeline between the third ball valve (25) and the first ball valve (14); and a third one-way valve (16) is provided on the pipeline between the third ball valve (25) and the second ball valve (17).

9. A multiphase flow erosion corrosion test method, characterized in that: Based on a multiphase flow erosion corrosion test device according to any one of claims 1 to 8 above, a multiphase flow erosion corrosion test method comprises: Pure gas phase erosion corrosion test: Close the second ball valve, and open the first ball valve, the third ball valve, the fourth ball valve, and the fifth ball valve; Open multiple pressure regulating valves and fill the gas storage tank with mixed gas; The mixed gas pressure is adjusted by a pressure reducing valve, and the mixed gas flow is adjusted by an adjustable flow valve; Turning on the first heater to preheat the mixed gas; Turn on the booster pump to pressurize the mixed gas; Turning on the third heater to heat the mixed gas; The mixed gas enters the erosion chamber and the test pipeline to carry out the erosion corrosion test; Liquid-solid two-phase erosion corrosion test: Close the first ball valve, and open the second ball valve, the third ball valve, the fourth ball valve, and the fifth ball valve; Adding liquid and eroded solid particles into the solid-liquid mixing tank respectively to form a sand-carrying liquid; Turn on the mud pump to suck out the sand-carrying liquid in the solid-liquid mixing tank; Turn on the second heater to preheat the sand-carrying fluid; Turn on the booster pump to pressurize the sand-carrying fluid; Turn on the third heater to heat the sand-carrying liquid; The sand-carrying liquid enters the erosion chamber and the test pipeline to carry out the erosion corrosion test; Gas-liquid two-phase erosion corrosion test: Open the first ball valve, the second ball valve, the third ball valve, the fourth ball valve and the fifth ball valve; Adding liquid to the solid-liquid mixing tank; Turn on the mud pump to suck out the liquid in the solid-liquid mixing tank; Turning on the second heater to preheat the liquid; Open multiple pressure regulating valves and fill the gas storage tank with mixed gas; The mixed gas pressure is adjusted by a pressure reducing valve, and the mixed gas flow is adjusted by an adjustable flow valve; Turning on the first heater to preheat the mixed gas; Turn on the booster pump to pressurize the gas-liquid two-phase erosion medium; Turning on the third heater to increase the temperature of the gas-liquid two-phase erosion medium; The gas-liquid two-phase erosion medium enters the erosion chamber and the test pipeline to carry out the erosion corrosion test; Gas-solid-liquid three-phase erosion-corrosion test: Open the first ball valve, the second ball valve, the third ball valve, the fourth ball valve and the fifth ball valve; Adding liquid and eroded solid particles into the solid-liquid mixing tank respectively to form a sand-carrying liquid; Turn on the mud pump to suck out the sand-carrying liquid in the solid-liquid mixing tank; Turn on the second heater to preheat the sand-carrying fluid; Open multiple pressure regulating valves and fill the gas storage tank with mixed gas; The mixed gas pressure is adjusted by a pressure reducing valve, and the mixed gas flow is adjusted by an adjustable flow valve; Turning on the first heater to preheat the mixed gas; Turn on the booster pump to pressurize the gas-liquid-solid three-phase erosion medium; Turning on the third heater to increase the temperature of the gas-liquid-solid three-phase erosion medium; The gas-liquid-solid three-phase erosion medium enters the erosion chamber and the test pipeline to carry out the erosion corrosion test.

10. A multiphase flow erosion-corrosion test method according to claim 9, characterized in that: During the pure gas phase erosion corrosion test: open the cyclone separator and circulate the mixed gas into the gas storage tank; During the liquid-solid two-phase erosion corrosion test: open the cyclone separator and circulate the sand-carrying liquid into the solid-liquid mixing tank; During the gas-liquid two-phase erosion corrosion test: open the cyclone separator, circulate the mixed gas in the gas-liquid two-phase erosion medium into the gas storage tank, and circulate the liquid in the gas-liquid two-phase erosion medium into the solid-liquid mixing tank; During the gas-solid-liquid three-phase erosion corrosion test: open the cyclone separator, circulate the mixed gas in the gas-liquid-solid three-phase erosion medium into the gas storage tank, and circulate the sand-carrying liquid in the gas-liquid two-phase erosion medium into the solid-liquid mixing tank.

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