Simple pipeline erosion device

Abstract

The utility model discloses a simple pipeline erosion device, including liquid supply unit, gas supply unit, sand supply unit, the component of waiting for measuring and liquid recovery unit, the component of waiting for measuring is communicated with the confluence pipe line of liquid supply unit, gas supply unit, sand supply unit through main line, and the end of component of waiting for measuring is connected with liquid recovery unit, the liquid supply unit of setting in this scheme is the liquid phase medium for erosion, and the gas supply unit is the gas phase medium for erosion, and the sand supply unit is the solid phase medium for erosion, after the backflow of liquid supply unit, gas supply unit, sand supply unit, according to the erosion condition of need research is controlled, realizes for the component of gas phase, liquid phase, gas phase and solid phase under the predetermined speed, the combination of solid phase and liquid phase, and the component of gas phase, liquid phase and solid phase, five different conditions research, through simple structure, can low cost, efficient complete the influence test of different erosion conditions to the component of waiting for measuring, provides necessary condition for the efficient selection reasonable filter.

Description

Technical Field

[0001] This utility model relates to the field of pipeline erosion testing technology, and in particular to a simple pipeline erosion device. Background Technology

[0002] With the increasing demand for natural gas, shale gas extraction has developed rapidly. Hydraulic fracturing is a crucial step in shale gas extraction. Hydraulic fracturing involves injecting a large amount of liquid containing proppant (mainly sand or ceramic particles) into the shale formation under high pressure. The injected liquid, under high pressure, causes fractures in the shale formation, allowing the shale gas to flow smoothly into the wellbore. Simultaneously, the shale formation itself may contain a certain amount of natural sand particles. During extraction, when the wellbore penetrates the shale formation, these sand particles, originally present in the formation, are carried to the surface along with the shale gas, posing a threat to the gathering and transportation system. Current technologies typically employ multi-stage filtration equipment for filtration. Coarse filters can intercept larger sand particles, while fine filters further remove smaller sand particles, effectively reducing the amount of sand entering subsequent gathering and transportation pipelines and equipment. Cyclone desanders utilize centrifugal force to throw sand particles against the vessel wall in a swirling field and allow them to settle to the bottom, achieving separation of sand particles from the shale gas flow. These desanders have a large flow rate and can handle situations with high sand content to a certain extent. However, both filtration equipment and hydrocyclone sand separators are prone to clogging, reducing separation efficiency. Furthermore, the added equipment requires regular maintenance and replacement of filter media or internal cleaning; frequent maintenance increases production costs and equipment downtime, impacting the continuous extraction and transportation of shale gas. Existing technologies also use chemical sand control agents, which form a protective film on the surface of sand particles or bind the particles together, reducing their flowability. However, chemical sand control agents have a limited shelf life and require periodic injection, increasing operating costs. Moreover, the injected chemicals may cause environmental pollution, necessitating rigorous environmental assessments and remediation measures.

[0003] Filtered media will always contain fine particles due to limitations in filtration precision. The selection of filter components is often constrained by cost and available space. Finding the right balance between cost, filtration precision, pipeline erosion effectiveness, and installation method is a challenge for engineers. This is because while there is extensive research on pipeline erosion, focusing on erosion theory, simulation, and microscopic mechanisms, experimental erosion studies are relatively few. Conclusions require experimental verification. Current erosion experiments involve numerous procedures, complex conditions, and are predominantly single-phase and two-phase flow experiments. Furthermore, there is no mature theoretical formula to derive a three-phase erosion effect reflecting the gas-liquid-solid erosion process. Therefore, it is necessary to design a simple pipeline erosion device. Utility Model Content

[0004] The purpose of this invention is to provide a simple pipeline erosion device to address the above-mentioned shortcomings, thereby solving the problems of existing technologies where erosion experiments involve many steps, complex conditions, and mostly involve single-phase and two-phase flow experiments, making it difficult to conduct efficient testing of multiphase media in a simple and efficient manner.

[0005] This utility model is achieved through the following solution:

[0006] A simple pipeline erosion device includes a liquid supply unit, an air supply unit, a sand supply unit, a test component, and a liquid recovery unit; the test component is connected to the manifold of the liquid supply unit, the air supply unit, and the sand supply unit via a main pipeline, and the end of the test component is connected to the liquid recovery unit.

[0007] Based on the structure of the aforementioned simple pipeline erosion device, the liquid supply unit, gas supply unit, and sand supply unit are all equipped with a control unit for controlling the speed of the medium.

[0008] Based on the structure of the above-mentioned simple pipeline erosion device, the liquid supply unit includes a liquid storage section, a pump body structure, a liquid outlet pipe, and a flow meter; the pump body structure is located in the liquid storage section, the liquid outlet pipe is connected to the pump body structure, and the flow meter is installed on the liquid outlet pipe.

[0009] Based on the structure of the above-mentioned simple pipeline erosion device, a first shut-off valve is provided on the outlet pipe, and the first shut-off valve is located at the end of the outlet pipe away from the pump body structure.

[0010] Based on the structure of the above-mentioned simple pipeline erosion device, the air supply unit includes a fan, a speed measuring unit, a pressure measuring unit, and an air outlet pipe; the air outlet pipe is connected to the liquid outlet pipe through a first tee pipe, and a manifold is connected to the first tee pipe; the speed measuring unit and the pressure measuring unit are installed on the air outlet pipe, and the fan is installed at the initial position of the air outlet pipe.

[0011] Based on the structure of the aforementioned simple pipe erosion device, a second shut-off valve is provided on the air outlet pipe, and the second shut-off valve is located on the connecting pipe between the air outlet pipe and the tee pipe.

[0012] Based on the structure of the aforementioned simple pipeline erosion device, the pump body structure is specifically a variable frequency water pump, the speed measuring unit is an anemometer, and the pressure measuring unit is a pressure gauge.

[0013] Based on the structure of the above-mentioned simple pipeline erosion device, the sand supply unit includes a sand feeding device, a timing device, and a sand outlet pipe; the manifold, the sand outlet pipe, and the main pipeline are respectively connected through a second tee pipe; the switch of the sand feeding device is connected to the timing device.

[0014] Based on the structure of the aforementioned simple pipe erosion device, the component under test includes a horizontal 90° elbow, a vertical 90° elbow, a connecting flange, and a connecting pipe; the horizontal 90° elbow, the vertical 90° elbow, and the connecting pipe are combined according to the test requirements via the connecting flange.

[0015] Based on the structure of the aforementioned simple pipeline erosion device, the sand feeding device includes a cylindrical barrel and a funnel-shaped bottom, with a sand feeding switch installed at the bottom.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] 1. This scheme is equipped with an independent liquid supply unit to provide liquid medium for erosion, an independent gas supply unit to provide gaseous medium for erosion, and an independent sand supply unit to provide solid medium for erosion. After the liquid supply unit, gas supply unit, and sand supply unit are refluxed, they are controlled according to the erosion conditions to be studied. This enables the study of five different conditions at a predetermined velocity: gas phase, liquid phase, gas phase and solid phase components, solid phase and liquid phase combinations, and gas phase, liquid phase and solid phase components. Through a simple structure, the impact test of the components under test under different erosion conditions can be completed in a low-cost and efficient manner, providing the necessary conditions for the efficient selection of reasonable filters. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure Descriptions: 1. Liquid supply unit; 2. Gas supply unit; 3. Sand supply unit; 4. Component to be tested; 5. Liquid recovery unit; 6. Main pipeline; 7. Manifold; 11. Liquid storage section; 12. Pump body structure; 13. Liquid outlet pipe; 14. Flow meter; 15. First shut-off valve; 21. Fan; 22. Speed ​​measuring unit; 23. Pressure measuring unit; 24. Air outlet pipe; 25. Second shut-off valve; 31. Sand feeding equipment; 32. Timing device; 33. Sand outlet pipe; 41. Horizontal 90° elbow; 42. Vertical 90° elbow; 43. Connecting flange; 44. Connecting pipe; 61. First tee pipe; 62. Second tee pipe. Detailed Implementation

[0020] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0021] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0024] Example 1

[0025] like Figure 1 As shown, this utility model provides a technical solution:

[0026] A simple pipeline erosion device includes, but is not limited to, a liquid supply unit 1, an air supply unit 2, a sand supply unit 3, a test component 4, and a liquid recovery unit 5; the test component 4 is connected to the manifold 7 of the liquid supply unit 1, the air supply unit 2, and the sand supply unit 3 via a main pipeline 6, and the end of the test component 4 is connected to the liquid recovery unit 5.

[0027] Based on the above structure, this scheme includes an independent liquid supply unit 1 to provide liquid medium for erosion, an independent gas supply unit 2 to provide gas medium for erosion, and an independent sand supply unit 3 to provide solid medium for erosion. After the liquid supply unit 1, gas supply unit 2, and sand supply unit 3 are refluxed, the system is controlled according to the erosion conditions to be studied. This enables research under five different conditions: gas phase, liquid phase, gas phase and solid phase components, solid phase and liquid phase combinations, and gas phase, liquid phase and solid phase components at a predetermined velocity. Through a simple structure, the impact test of the component 4 under different erosion conditions can be completed at low cost and high efficiency, providing the necessary conditions for the efficient selection of a reasonable filter.

[0028] As an example, the liquid supply unit 1, the gas supply unit 2, and the sand supply unit 3 are all equipped with a control unit for controlling the speed of their media;

[0029] Based on the above structure, the control unit can be used to study the effects of different phase media on pipeline erosion at different speeds, making the application scenarios of this solution more extensive.

[0030] As an example, the liquid supply unit 1 may include a liquid storage section 11, a pump body structure 12, a liquid outlet pipe 13, and a flow meter 14; the pump body structure 12 is disposed in the liquid storage section 11, the liquid outlet pipe 13 is connected to the pump body structure 12, and the flow meter 14 is disposed on the liquid outlet pipe 13.

[0031] Based on the above structure, the liquid medium is stored in the liquid storage section 11, and the liquid medium is transported to the outlet pipe 13 through the pump body structure 12. The flow meter 14 is used to detect the liquid flow rate, and the pump body structure 12 controls the flow rate of different liquids by controlling the rotation speed.

[0032] As an example, a first shut-off valve 15 may be provided on the outlet pipe 13, and the first shut-off valve 15 is located at the end of the outlet pipe 13 away from the pump body structure 12.

[0033] Based on the above structure, by setting a first shut-off valve 15 on the liquid outlet pipe 13, the backflow of liquid medium and other mixed media can be avoided, so that liquid medium and other mixed media can only flow in a predetermined direction. In particular, the backflow of gas medium can be avoided when the pump body structure 12 is not turned on.

[0034] As an example, the air supply unit 2 may include a fan 21, a speed measuring unit 22, a pressure measuring unit 23, and an air outlet pipe 24; the air outlet pipe 24 is connected to the liquid outlet pipe 13 through a first three-way pipe 61, and a manifold 7 is connected to the first three-way pipe 61; the speed measuring unit and the pressure measuring unit 23 are arranged on the air outlet pipe 24, and the fan 21 is arranged at the initial position of the air outlet pipe 24.

[0035] Based on the above structure, the fan 21 provides high-pressure air to the outlet pipe 24, the speed measuring unit 22 measures the air supply speed, and the pressure measuring unit 23 can measure the pressure inside the outlet pipe 24, which facilitates subsequent adjustment. The fan 21 controls the air speed by changing its rotation speed, providing a precise gaseous medium for the experiment.

[0036] As an example, a second shut-off valve 25 may be installed on the air outlet duct 24, and the second shut-off valve 25 is installed on the connecting pipe 44 between the air outlet duct 24 and the three-way pipe.

[0037] Based on the above structure, the second shut-off valve 25 can prevent the liquid medium from flowing back to the air outlet pipe 24 when the fan 21 is turned off, thus protecting the fan 21 assembly.

[0038] As an example, the pump body structure 12 can be a variable frequency water pump, the speed measuring unit 22 can be an anemometer, and the pressure measuring unit 23 can be a pressure gauge.

[0039] As an example, the sand supply unit may include a sand feeding device 31, a timing device 32, and a sand outlet pipe 33; the manifold 7, the sand outlet pipe 33, and the main pipeline 6 are connected by a second tee pipe 62; the switch of the sand feeding device 31 is connected to the timing device 32, and the timing device 32 controls the opening time of the sand feeding device 31, thereby controlling the amount of solid medium fed in.

[0040] Based on the above structure, the sand feeding device 31 in this scheme consists of a cylindrical barrel and a funnel-shaped bottom. A sand feeding switch is installed at the bottom, and the size of the switch can be adjusted to achieve the purpose of adding sand. At the same time, an external timer device 32 is connected to control the on / off duration and frequency of the sand feeding switch to simulate the situation where the sand output frequency and output are not fixed on site, thus better reflecting the sand output situation on site. The sand outlet is connected to the sand output pipe 33, and the sand particles and the substances in the pipeline enter the test component 4 through the mutual fusion of a section of horizontal main pipeline 6.

[0041] As an example, the component under test 4 may include a horizontal 90° elbow 41, a vertical 90° elbow 42, a connecting flange 43, and a connecting pipe 44; the horizontal 90° elbow 41, the vertical 90° elbow 42, and the connecting pipe 44 are combined according to the test requirements via the connecting flange 43.

[0042] Based on the above structure, in ground-based gathering and transmission pipelines, the erosion is most severe in horizontal 90° bends, mainly distributed from the bend corner to the outer side of the bend outlet. The erosion of vertical 90° bends is relatively weaker, while the erosion wear rate in straight sections is very small. The erosion wear rate increases with increasing gas volume and sand particle diameter. Combining horizontal and vertical 90° bends reveals different erosion patterns under upward, downward, and horizontal gas transmission conditions, aiming to find the optimal bend installation method for preventing bend erosion. The addition of sand and the subsequent treatment of exhaust gas and waste sand remain key areas of focus for future research.

[0043] As an example, the liquid storage section 11 can be a water storage tank, and the liquid recovery unit 5 can be a recovery pool.

[0044] In this design, a water storage tank provides the necessary water for testing. The tank itself can hold 100L of water. The variable frequency pump is located within the tank and can pump water for testing. The water enters the infusion pipeline, which is equipped with a liquid flow meter 14 and a first check valve. The other end of the gas infusion pipeline is connected to a tee on the gas infusion pipeline. The amount of water used for testing is controlled by adjusting the speed of the variable frequency pump, and the flow rate is measured using the liquid flow meter 14. The first check valve is located after the liquid flow meter 14 and acts as a shut-off valve in case of malfunction or other operational errors. The water storage tank, variable frequency pump, liquid flow meter 14, infusion pipeline, and first check valve constitute the liquid supply unit. A variable frequency fan 21 is connected to the tee on the gas infusion pipeline, and an anemometer and pressure gauge are installed on the connected pipeline. The variable frequency fan 21 draws air into the gas infusion pipeline, and the flow rate and pressure are measured using the anemometer and pressure gauge. A second check valve is installed on the gas pipeline to prevent backflow of liquid and sand. The gas supply unit consists of a variable frequency fan 21, an anemometer, a pressure gauge, the gas pipeline, and the second check valve. The liquid supply unit 1 and the gas supply unit 2 are connected via a tee, and the resulting gas-liquid mixture flows within the gas pipeline. By switching the variable frequency water pump, the variable frequency fan 21, and the sand-adding equipment, different erosion conditions (gas, liquid, gas-solid, solid-liquid, gas-liquid-solid) can be created. Combined with any combination of test pipe fittings, the effects of different erosion conditions on different bend structures can be tested.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A simple pipe erosion device, characterized in that: It includes a liquid supply unit (1), an air supply unit (2), a sand supply unit (3), a test component (4), and a liquid recovery unit (5); the test component (4) is connected to the manifold (7) of the liquid supply unit (1), the air supply unit (2), and the sand supply unit (3) through the main pipeline (6), and the end of the test component (4) is connected to the liquid recovery unit (5).

2. The simple pipeline erosion device as described in claim 1, characterized in that: Each of the liquid supply unit (1), gas supply unit (2), and sand supply unit (3) is equipped with a control unit for controlling the speed of its medium.

3. The simple pipeline erosion device as described in claim 2, characterized in that: The liquid supply unit (1) includes a liquid storage section (11), a pump body structure (12), a liquid outlet pipe (13), and a flow meter (14); the pump body structure (12) is located in the liquid storage section (11), the liquid outlet pipe (13) is connected to the pump body structure (12), and the flow meter (14) is located on the liquid outlet pipe (13).

4. A simple pipe erosion device as described in claim 3, characterized in that: A first shut-off valve (15) is provided on the outlet pipe (13), and the first shut-off valve (15) is located at the end of the outlet pipe (13) away from the pump body structure (12).

5. A simple pipe erosion device as described in claim 4, characterized in that: The air supply unit (2) includes a fan (21), a speed measuring unit (22), a pressure measuring unit (23), and an air outlet pipe (24); the air outlet pipe (24) is connected to the liquid outlet pipe (13) through a first three-way pipe (61), and a manifold pipe (7) is connected to the first three-way pipe (61); the speed measuring unit and the pressure measuring unit (23) are installed on the air outlet pipe (24), and the fan (21) is installed at the initial position of the air outlet pipe (24).

6. A simple pipe erosion device as described in claim 5, characterized in that: A second shut-off valve (25) is provided on the air outlet pipe (24), and the second shut-off valve (25) is located on the connecting pipe (44) between the air outlet pipe (24) and the three-way pipe.

7. A simple pipe erosion device as described in claim 6, characterized in that: The pump body structure (12) is specifically a variable frequency water pump, the speed measuring unit (22) is an anemometer, and the pressure measuring unit (23) is a pressure gauge.

8. A simple pipe erosion device as described in claim 7, characterized in that: The sand supply unit includes a sand feeding device (31), a timing device (32), and a sand outlet pipe (33); the manifold (7), the sand outlet pipe (33), and the main pipeline (6) are connected by a second tee pipe (62); the switch of the sand feeding device (31) is connected to the timing device (32).

9. A simple pipe erosion device as described in claim 8, characterized in that: The component under test (4) includes a horizontal 90° elbow (41), a vertical 90° elbow (42), a connecting flange (43), and a connecting pipe (44); the horizontal 90° elbow (41), the vertical 90° elbow (42), and the connecting pipe (44) are combined according to the test requirements through the connecting flange (43).

10. A simple pipe erosion device as described in claim 9, characterized in that: The sand feeding device (31) includes a cylindrical barrel and a funnel-shaped bottom, with a sand feeding switch at the bottom.

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