Multi-phase flow erosion corrosion test device

Abstract

The invention provides a multiphase flow erosion corrosion test device, which comprises a corrosion test unit, the corrosion test unit comprises a plurality of corrosion test pipe sections, the corrosion test unit enables a test fluid to sequentially flow through each corrosion test pipe section and to simultaneously flow through each corrosion test pipe section, and if the test fluid sequentially flows through each corrosion test pipe section, the corrosion test unit is connected with the corresponding corrosion test pipe section. Test parameters configured for each corrosion test pipe section are the same; if the test fluid flows through each corrosion test pipe section at the same time, the test parameters configured for each corrosion test pipe section are different. According to the invention, the influence rule of different test parameters on erosion corrosion can be studied, and the erosion corrosion resistance of different materials can be studied and evaluated.

Description

Technical Field

[0001] The present invention relates to the technical field of rock gas gathering and transportation, and in particular to a multiphase flow erosion corrosion test device. Background Art

[0002] Fracturing is a key step in shale gas development. During the fracturing process, large amounts of fracturing fluid and fracturing sand are required, resulting in large amounts of sand and fluid in shale gas wells. After the well is drilled and enters the production stage, a large amount of sediment is still deposited in the horizontal section. During the production process, a large amount of sand is entrained in the airflow to form a gas, water, and sand multiphase flow fluid, resulting in severe erosion and corrosion, which has become a problem plaguing shale gas development and production. The erosion and corrosion of gas, water, and sand multiphase flow is affected by many factors, and the corrosion process is complex and changeable. Therefore, it is necessary to establish a multiphase flow erosion and corrosion simulation test device to study the erosion and corrosion of gas, water, and sand multiphase flow.

[0003] Through the multiphase flow erosion corrosion test device, it is necessary to be able to study the influence of different test parameters on erosion corrosion and the erosion corrosion resistance of different materials. Existing multiphase flow erosion corrosion test devices often find it difficult to achieve both at the same time. Summary of the Invention

[0004] One purpose of the present invention is to provide a multiphase flow erosion corrosion test device, which can not only study the influence of different test parameters on erosion corrosion, but also study and evaluate the erosion corrosion resistance of different materials.

[0005] According to the present invention, a multiphase flow erosion corrosion test device includes a corrosion test unit, which includes multiple corrosion test pipe sections. The corrosion test unit allows the test fluid to flow through each of the corrosion test pipe sections in sequence and simultaneously. If the test fluid flows through each of the corrosion test pipe sections in sequence, each of the corrosion test pipe sections is configured with the same test parameters; if the test fluid flows through each of the corrosion test pipe sections simultaneously, each of the corrosion test pipe sections is configured with different test parameters.

[0006] In a preferred embodiment, the corrosion test unit further includes a first main pipeline and a second main pipeline arranged at both ends of each corrosion test pipe section, and a plurality of main pipeline valves are respectively provided on the first main pipeline and the second main pipeline, and each main pipeline valve can be connected to each corrosion test pipe section by opening.

[0007] In a preferred embodiment, it also includes a first connecting pipe, which is connected to the first main pipe, and a first main pipe valve and a second main pipe valve are respectively provided on both sides of the connection position between the first connecting pipe and the first main pipe, wherein the first main pipe valve is connected to a first corrosion test pipe section through which the test fluid can pass first, and the second main pipe valve is connected to a second corrosion test pipe section that can pass through the first corrosion test pipe section, and the second corrosion test pipe section can be connected to the third main pipe valves on the first main pipe and the second main pipe.

[0008] In a preferred embodiment, the test parameters include but are not limited to one or more of temperature, pressure, and flow rate.

[0009] In a preferred embodiment, the test fluid further comprises a sand control unit disposed upstream of the corrosion test unit, wherein the sand control unit is used to control the particle size and amount of sand in the test fluid.

[0010] In a preferred embodiment, the sand control unit includes a plurality of filters, each of the filters has a different filter mesh number, and the filter mesh numbers of the filters through which the test fluid passes gradually increase.

[0011] In a preferred embodiment, the test fluid can pass through any one of the filters alone, or through any combination of two or more of the filters.

[0012] In a preferred embodiment, a multiphase flow meter is further provided between the corrosion test unit and the sand control unit for measuring the contents of gas, water and sand in the test fluid.

[0013] In a preferred embodiment, it further includes a transparent pipe arranged on the pipe between the corrosion test unit and the sand control unit.

[0014] In a preferred embodiment, the corrosion test pipe section has a corrosion test pipe portion, and the corrosion test pipe portion is provided with an ultrasonic detection probe for ultrasonically detecting the corrosion of the corrosion test pipe portion caused by the test fluid. The corrosion test device also includes a control unit, which is electrically connected to the ultrasonic detection probe and is used to control the ultrasonic detection probe and record corresponding data.

[0015] In a preferred embodiment, it further comprises an electric regulating valve disposed upstream of the sand control unit, wherein the electric regulating valve is used to adjust the flow rate of the test fluid.

[0016] In a preferred embodiment, the upstream pipeline of the electric regulating valve is connected to the actual on-site production process through a bypass pipeline.

[0017] The present invention comprises a plurality of corrosion test pipe sections through a corrosion test unit, and the test fluid can flow through each corrosion test pipe section in sequence or simultaneously. If the test fluid flows through each corrosion test pipe section in sequence, since each corrosion test pipe section is configured with the same test parameters, the corrosion protection effects of the corrosion test pipe sections of different materials can be compared and evaluated by selecting corrosion test pipe sections of different materials; if the test fluid flows through each corrosion test pipe section at the same time, different test parameters can be configured for each corrosion test pipe section to compare and analyze the effects of different test parameter changes on the erosion corrosion of gas, water and sand multiphase flows.

[0018] The test fluid can pass through any one of the filters alone or through any combination of two or more filters, thereby obtaining a variety of sand particle sizes and further analyzing the effects of various sand particle sizes on erosion corrosion of the corrosion test pipe section.

[0019] The present invention detects the corrosion of the corrosion test pipe caused by the test fluid through an ultrasonic detection probe, and the ultrasonic detection probe is electrically connected to a control unit, thereby being able to achieve online continuous monitoring of corrosion data with the help of online monitoring means, and rapid feedback of test data.

[0020] The upstream pipeline of the electric control valve is connected to the actual on-site production process through a bypass pipeline, which can realize switching or parallelization between the test process and the production process, realistically simulating the test environment while ensuring normal production on site. The test fluid comes from the actual on-site production process, and there is no need for manual preparation of test media or heavy test links such as on-site sampling. With the help of the conditions of the production site, the test parameters such as flow, flow velocity and pressure can be highly simulated, ensuring the consistency of test parameters and on-site parameters, which can greatly improve the conformity of data with actual on-site conditions.

[0021] The present invention adjusts the flow rate of the test fluid through the electric regulating valve, and can examine the influence of the fluid flow rate on the erosion corrosion of the gas, water and sand multiphase flow.

[0022] The present invention improves the efficiency of filtering sand particles by virtue of the sand particle control unit comprising a plurality of filters, each filter having a different filter mesh number, and the filter mesh numbers of the filters through which the test fluid passes gradually increasing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure schematically shows the overall structure of the multiphase flow erosion corrosion test device according to the present invention.

[0024] In this application, all drawings are schematic drawings, which are only used to illustrate the principles of the present invention and are not drawn to scale. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "upstream," "upstream," "near," and the like, indicating positions or locations, are based on the positions or locations shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. In the present invention, "plurality" refers to two or more.

[0027] In the present invention, unless otherwise expressly specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, integration or communication; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0028] like Figure 1 As shown, the multiphase flow erosion corrosion test device 100 of the present invention includes a corrosion test unit 1, which includes multiple corrosion test pipe sections 11. The corrosion test unit 1 allows the test fluid to flow through each corrosion test pipe section 11 either sequentially or simultaneously. If the test fluid flows through each corrosion test pipe section 11 sequentially, the test parameters configured for each corrosion test pipe section 11 are the same. If the test fluid flows through each corrosion test pipe section 11 simultaneously, the test parameters configured for each corrosion test pipe section 11 are different. The test fluid refers to a multiphase flow fluid composed of gas, water, and sand with different flow rates.

[0029] Specifically, the corrosion test unit 1 also includes a first main pipeline a and a second main pipeline b, and the first main pipeline a and the second main pipeline b are respectively provided with a main pipeline valve group 22. The main pipeline valve group 22 includes a plurality of main pipeline valves that can be connected to each other. Except for the first corrosion test pipe section 11-1 that the test fluid can pass through first and the last corrosion test pipe section 11-n (n is an integer greater than or equal to 2) that the test fluid can pass through last, each corrosion test pipe section 11 is respectively provided with a test pipe section valve 2 near the first main pipeline a and the second main pipeline b, and each main pipeline valve 22 can be connected to each corrosion test pipe section 11 by opening.

[0030] The multiphase flow erosion corrosion test device described in the present invention also includes a first connecting pipe c, which is connected to the first main pipe a, and the test fluid enters the first main pipe a through the first connecting pipe c. A first main pipe valve 221 and a second main pipe valve 222 are respectively provided on both sides of the connection position between the first connecting pipe c and the first main pipe a, wherein the first main pipe valve 221 is connected to the first corrosion test pipe section 11-1 through which the test fluid can pass first, and the second main pipe valve 222 is connected to the second corrosion test pipe section 11-2 that can pass through the test pipe section valve 2 and the first corrosion test pipe section 11-1, and the second corrosion test pipe section 11-2 can be connected to the third main pipe valve 223 on the first main pipe a and the second main pipe b through the test pipe section valve 2.

[0031] The third main pipeline valve 223 on the first main pipeline a and the second main pipeline b can be connected to the third corrosion test pipe section 11-3 through the test pipe section valve 2 on the third corrosion test pipe section 11-3, and so on to the last corrosion test pipe section 11-n. The nth main pipeline valve 22n on the first main pipeline a and the second main pipeline b is connected to the last corrosion test pipe section 11-n.

[0032] The multiphase flow erosion corrosion test apparatus of the present invention further includes a second connecting pipe d and a third connecting pipe e. The second connecting pipe d is connected in series with the final corrosion test pipe segment 11-n. The third connecting pipe e is configured as a bypass pipe for the final corrosion test pipe segment 11-n, for converging and outputting the fluid. The second connecting pipe d and the third connecting pipe e are respectively provided with a first connecting pipe valve D and a second connecting pipe valve E. The second connecting pipe d is connected to the second connecting pipe valve E via the first connecting pipe valve D. The second connecting pipe d is connected to the second main pipe b via the nth main pipe valve 22n on the second main pipe b. The third connecting pipe e is connected to the first main pipe a via the nth main pipe valve 22n on the first main pipe a. Taking the corrosion test unit 1 including four corrosion test pipe segments 11 as an example, this article will illustrate how the test fluid can flow through each corrosion test pipe segment 11 both sequentially and simultaneously.

[0033] Close the second main pipeline valve 222 and open the first main pipeline valve 221. Close the third main pipeline valve 223 on the second main pipeline b and open the third main pipeline valve 223 on the first main pipeline a. Close the fourth main pipeline valve 224 on the first main pipeline a and open the fourth main pipeline valve 224 on the second main pipeline b. Open all the test pipe segment valves 2. The test fluid first enters the first main pipeline a through the first connecting pipeline c and can sequentially pass through the first corrosion test pipe segment 11-1, the second corrosion test pipe segment 11-2, the third corrosion test pipe segment 11-3, and the final corrosion test pipe segment 11-4. Close the first connecting pipeline valve D and open the second connecting pipeline valve E. Simultaneously, open all valves on the first and second main pipelines a and all test pipe segment valves 2. Close the second connecting pipeline valve E and open the first connecting pipeline valve D. The test fluid first enters the first main pipeline a through the first connecting pipeline c, and then flows through the first main pipeline valve 221 to the first corrosion test pipe segment 11-1. It is then diverted to the second corrosion test pipe segment 11-2, the second corrosion test pipe segment 11-3, and the final corrosion test pipe segment 11-4 through the second main pipeline valve 222. By adjusting the opening of the test pipe segment valve 2, the flow rate and pressure flowing through each corrosion test pipe segment can be adjusted, thereby configuring different test parameters for each corrosion test pipe segment. The present invention includes a plurality of corrosion test pipe segments 11 through the corrosion test unit 1, and the test fluid can flow through each corrosion test pipe segment 11 either sequentially or simultaneously. If the test fluid flows through each corrosion test pipe section 11 in sequence, since each corrosion test pipe section 11 is configured with the same test parameters, the corrosion test pipe sections 11 made of different materials can be selected to compare and evaluate the anti-corrosion effects of the corrosion test pipe sections 11 made of different materials; if the test fluid flows through each corrosion test pipe section 11 at the same time, different test parameters can be configured for each corrosion test pipe section 11 to compare and analyze the effects of different test parameter changes on the erosion corrosion of gas, water and sand multiphase flows.

[0034] In one or more embodiments, the test parameters include but are not limited to one or more of temperature, pressure, and flow rate.

[0035] In one or more embodiments, the multiphase flow erosion corrosion test device 100 of the present invention further includes a sand control unit 3 disposed upstream of the corrosion test unit 1, and the sand control unit 3 is used to control the particle size and amount of sand in the test fluid.

[0036] The present invention provides a sand control unit 3 upstream of the corrosion test unit 1 and the sand control unit 3 is used to control the particle size of sand in the test fluid, thereby being able to analyze the effects of the particle size and amount of sand on the erosion corrosion of the corrosion test pipe section 11.

[0037] In one or more embodiments, the sand control unit 3 includes a plurality of filters 31 , each filter 31 having a different filter mesh number, and the filter mesh numbers of the filters 31 through which the test fluid passes gradually increase.

[0038] The present invention improves the efficiency of filtering sand particles by virtue of the sand control unit 3 comprising a plurality of filters 31 , each filter 31 having a different filter mesh number, and the filter mesh numbers of the filters 31 through which the test fluid passes gradually increasing.

[0039] In one or more embodiments, the test fluid can pass through any one of the filters 31 alone, or through any combination of two or more of the filters 31, so as to obtain a variety of sand particle sizes, and then analyze the effects of the various sand particle sizes on the erosion corrosion of the corrosion test pipe section 11.

[0040] Specifically, valves t are installed on the pipes on both sides of each filter 31. The pipes containing the filters 31 are connected in sequence. Each filter 31 is also provided with a bypass line, each of which is equipped with a valve t. The bypass lines of the filters 31 are connected in sequence. When the test fluid needs to flow through a particular filter 31, the valve t on the bypass line of that filter 31 is closed, and the valves t installed on the pipes on both sides of the filter 31 are opened.

[0041] In one or more embodiments, the multiphase flow erosion-corrosion testing apparatus 100 of the present invention further includes an electric control valve 4 disposed upstream of the sand control unit 3. Electric control valve 4 is configured to adjust the flow rate of the test fluid. By regulating the flow rate of the test fluid through electric control valve 4, the present invention can examine the effect of fluid flow rate on erosion-corrosion caused by multiphase flow of gas, water, and sand.

[0042] In one or more embodiments, the multiphase flow erosion corrosion test device 100 of the present invention further includes a multiphase flow meter 41 disposed between the corrosion test unit 1 and the sand control unit 3 for measuring the content of gas, water, and sand in the test fluid.

[0043] In one or more embodiments, the multiphase flow erosion corrosion test device 100 described in the present invention also includes a transparent pipe 5 arranged on the pipe between the corrosion test unit 1 and the sand control unit 3. Optionally, the transparent pipe 5 is arranged between the multiphase flow meter 41 and the corrosion test unit 1.

[0044] The present invention uses a transparent pipe 5 between the corrosion test unit 1 and the sand control unit 3, so that the flow pattern and flow state of the test fluid can be observed through the transparent pipe 5 and recorded by a high-speed camera.

[0045] In one or more embodiments, each corrosion test pipe section 11 includes a corrosion test pipe portion 111. A temperature sensor 6, a pressure sensor 7, and a flow meter 12 are installed on a pipe located on one side of the corrosion test pipe portion 111. The temperature sensor 6, the pressure sensor 7, and the flow meter 12 are respectively used to detect the temperature, pressure, and flow rate of the corrosion test pipe section 11. Optionally, the temperature sensor 6 and the pressure sensor 7 are installed on the corrosion test pipe section 11 via a valve.

[0046] In one or more embodiments, an ultrasonic detection probe 9 is provided on each corrosion test pipe portion 111 for ultrasonically detecting the corrosion of the corrosion test pipe portion 111 caused by the test fluid. The multiphase flow erosion corrosion test device 100 described in the present invention also includes a control unit 13, which is electrically connected to the ultrasonic detection probe 9 and is used to control the ultrasonic detection probe 9 and record corresponding data.

[0047] The present invention detects the corrosion of the test fluid on the corrosion test pipe 111 by the ultrasonic detection probe 9, and the ultrasonic detection probe 9 is electrically connected to the control unit 13, so that the online continuous monitoring of corrosion data can be achieved with the help of online monitoring means, and the test data feedback is fast.

[0048] In one or more embodiments, a resistance probe 8 and / or a corrosion coupon 14 are further provided on the pipeline located on one side of the corrosion test pipe section 111. The resistance probe 8 and the corrosion coupon 14 are used to monitor corrosion caused by the test fluid on the corrosion test pipe section 111. The multiphase flow erosion corrosion test apparatus 100 of the present invention also includes a control unit 13, which is electrically connected to the resistance probe 8 and is configured to display and record corresponding data. Optionally, the resistance probe 8 and the corrosion coupon 14 are mounted on the corrosion test pipe section 11 via a valve.

[0049] In one or more embodiments, the control unit 13 is further electrically connected to the temperature sensor 6 , the pressure sensor 7 , and the flow meter 12 , respectively, for displaying and recording corresponding data.

[0050] In one or more embodiments, the upstream pipeline of the electric control valve 4 is connected to the actual on-site production process through a bypass pipeline, which can realize switching or parallel operation between the test process and the production process, realistically simulating the on-site environment while ensuring normal production on site. The test fluid comes from the actual on-site production process, and there is no need for manual preparation of test media or heavy test steps of on-site sampling. With the help of the conditions of the production site, the test parameters such as flow rate, flow velocity and pressure can be highly simulated, ensuring the consistency of the test parameters and the on-site parameters, and can greatly improve the conformity of the data with the actual on-site conditions.

[0051] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A multiphase flow erosion corrosion test device, comprising a corrosion test unit comprising a plurality of corrosion test pipe sections, wherein the corrosion test unit allows the test fluid to flow through each of the corrosion test pipe sections either sequentially or simultaneously, wherein: If the test fluid flows through each corrosion test pipe section in sequence, each corrosion test pipe section is configured with the same test parameters; if the test fluid flows through each corrosion test pipe section at the same time, each corrosion test pipe section is configured with different test parameters.

2. The multiphase flow erosion corrosion testing device according to claim 1, characterized in that: The corrosion test unit also includes a first main pipeline and a second main pipeline arranged at both ends of each corrosion test pipe section. The first main pipeline and the second main pipeline are respectively provided with a plurality of main pipeline valves, and each main pipeline valve can be connected to each corrosion test pipe section by opening.

3. The multiphase flow erosion corrosion testing device according to claim 2, characterized in that: It also includes a first connecting pipe, which is connected to the first main pipe. A first main pipe valve and a second main pipe valve are respectively provided on both sides of the connection position between the first connecting pipe and the first main pipe, wherein the first main pipe valve is connected to a first corrosion test pipe section through which the test fluid can pass first, and the second main pipe valve is connected to a second corrosion test pipe section that can pass through the first corrosion test pipe section, and the second corrosion test pipe section can be connected to the third main pipe valves on the first main pipe and the second main pipe.

4. The multiphase flow erosion corrosion testing device according to claim 1, characterized in that: The test parameters include but are not limited to one or more of temperature, pressure, and flow rate.

5. The multiphase flow erosion corrosion testing device according to claim 1, characterized in that: The test fluid also includes a sand control unit disposed upstream of the corrosion test unit, and the sand control unit is used to control the particle size and amount of sand in the test fluid.

6. The multiphase flow erosion corrosion testing device according to claim 5, characterized in that: The sand control unit includes a plurality of filters, each of which has a different filter mesh number, and the filter mesh numbers of the filters through which the test fluid passes gradually increase.

7. The multiphase flow erosion corrosion testing device according to claim 6, characterized in that: The test fluid can pass through any one of the filters alone, or through any combination of two or more of the filters.

8. The multiphase flow erosion corrosion testing device according to claim 5, characterized in that: It also includes a multiphase flow meter arranged between the corrosion test unit and the sand particle control unit, which is used to measure the content of gas, water and sand in the test fluid.

9. The multiphase flow erosion corrosion testing device according to claim 5, characterized in that: It also includes a transparent pipe arranged on the pipe between the corrosion test unit and the sand control unit.

10. The multiphase flow erosion corrosion testing device according to claim 6, characterized in that: The corrosion test pipe section has a corrosion test pipe portion, and the corrosion test pipe portion is provided with an ultrasonic detection probe for ultrasonically detecting the corrosion of the corrosion test pipe portion caused by the test fluid. The corrosion test device also includes a control unit, which is electrically connected to the ultrasonic detection probe and is used to control the ultrasonic detection probe and record corresponding data.

11. The multiphase flow erosion corrosion testing device according to claim 5, characterized in that: It also includes an electric regulating valve arranged upstream of the sand control unit, and the electric regulating valve is used to adjust the flow rate of the test fluid.

12. The multiphase flow erosion corrosion testing device according to claim 11, characterized in that: The upstream pipeline of the electric regulating valve is connected to the actual on-site production process through a bypass pipeline.

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