A kind of liquid accumulation pipeline internal corrosion real-time monitoring system and method

Abstract

The application provides a liquid-accumulation pipeline corrosion real-time monitoring system and method, which comprises a monitoring pipeline, a corrosion monitoring subsystem and a corrosion data determining mechanism; the monitoring pipeline is connected with a to-be-tested pipeline section with monitoring requirements, and comprises a basin-type pipeline and a parallel pipeline; liquid accumulation in the pipeline is stored through the basin-type pipeline, so as to restore the corrosion environment of the pipeline; a test piece is placed in the basin-type pipeline; the corrosion monitoring subsystem is arranged on the basin-type pipeline and comprises a detection device, a detection driving track plate and a micro-control detection driver, which are used for non-contact monitoring of thickness data of the test piece at different positions in the basin-type pipeline based on a set line of the track plate; the test piece thickness data detected by the corrosion monitoring subsystem is received by the corrosion data determining mechanism, and corresponding corrosion data results are analyzed according to the test piece thickness data and are output. The system can effectively overcome the problems of complex operation and limited monitoring scene in the prior art, and conveniently realizes efficient and reliable pipeline corrosion monitoring.

Description

Technical Field

[0001] This invention relates to the field of corrosion monitoring technology for liquid accumulation pipelines, and in particular to a real-time monitoring system and method for corrosion inside liquid accumulation pipelines. Background Technology

[0002] During oil and gas field production and transportation, in-service equipment and pipelines are essentially always operating in harsh environments. These environments present numerous challenges, including external factors such as high temperature, high pressure, and high flow rates, and internal factors such as free water, acidic components (e.g., carbon dioxide, hydrogen sulfide), salts, atmospheric oxygen levels, and bacteria. The combined effects of these internal and external environments easily lead to internal corrosion in oil and gas pipelines. The presence of accumulated liquid further accelerates pipeline corrosion. As crucial equipment in oil and gas production facilities, the safe operation of oil and gas pipelines is of paramount importance, making pipeline corrosion monitoring technology a widely studied and researched area.

[0003] Current main methods for monitoring corrosion in pipelines include physical strip methods, electrochemical methods, and ultrasonic methods. Each method has its own advantages but also certain limitations: the strip method is economical, simple, and widely used, but suffers from cumbersome operation, long monitoring cycles, and the tendency for monitoring results to be averaged; the electrochemical method allows for continuous monitoring, and the electrochemical noise method can obtain localized corrosion monitoring results, but this method has high requirements for the corrosive medium and the sample, and the circuit may affect the original corrosion morphology inside the pipeline; currently, the ultrasonic method is the most commonly used non-destructive monitoring method, with a wide monitoring range and convenient operation, but it is currently mainly used for timed and fixed-point monitoring of pipeline wall thickness, has high labor costs, and cannot achieve real-time monitoring. Therefore, existing monitoring measures mainly target CO2 corrosion and Cl- corrosion. - Uniform corrosion is not very effective against heterogeneous corrosion such as bacteria or biofilms, limiting its application and making it complex and costly to operate. In addition, some simulation devices used for corrosion monitoring lack high-precision reproduction of corrosion factors and environment, which cannot guarantee the reliability of simulation monitoring results.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a real-time monitoring system for corrosion in sludge-filled pipes. This system effectively overcomes the limitations of existing technologies, such as complex operation and restricted monitoring scenarios, and conveniently achieves efficient and reliable monitoring of pipe corrosion. The system involves parallel connection of the monitoring pipe and the pipe section to be monitored within the operating pipe. A basin-type pipe is used to store sludge, recreating the pipe's corrosive environment. A test piece is placed within the basin-type pipe. A corrosion monitoring subsystem, mounted on the basin-type pipe, includes a detection device, a detection drive track, and a micro-controlled detection driver. This subsystem performs non-contact monitoring of the thickness data of the test piece at different locations within the basin-type pipe, based on a predetermined path on the track. A corrosion data determination mechanism receives the test piece thickness data detected by the corrosion monitoring subsystem and analyzes the corresponding corrosion data based on this thickness data. Preferably, in one embodiment, the system includes:

[0006] Monitoring pipelines, corrosion monitoring subsystems, and corrosion data determination mechanisms;

[0007] The monitoring pipeline is connected at both ends to the pipe sections to be monitored in the working pipeline. The monitoring pipeline includes a basin-type pipeline and a parallel pipeline arranged parallel to the basin-type pipeline. A test piece is placed in the basin-type pipeline.

[0008] The parallel pipeline is used to replace the pipe section to be tested for conveying operations; the basin-type pipeline is used to store the accumulated liquid in the pipeline to restore the corrosive environment of the pipeline for the test piece.

[0009] The corrosion monitoring subsystem is installed in the basin-type pipe section and includes a detection device, a detection drive track plate, and a micro-controlled detection driver. It is used to monitor the thickness data of the test piece at different positions in the basin-type pipe without contact based on the set line of the track plate.

[0010] The corrosion data determination mechanism is connected to the corrosion monitoring subsystem and is used to receive the specimen thickness data detected by the corrosion monitoring subsystem, analyze the corresponding corrosion data results based on the specimen thickness data, and output them.

[0011] Furthermore, in one embodiment, the monitoring pipeline is connected to the pipe section to be tested via a flange, a valve is installed on the parallel pipeline, and valves are respectively installed at the input and output ends of the basin-type pipeline.

[0012] Alternatively, in one embodiment, the basin-shaped pipe is made of a non-conductive pipe material so that the detector signal passes through without being tested during monitoring.

[0013] In a preferred embodiment, the basin-type pipe is connected to the parallel pipe in a detachable manner to allow for flexible assembly and disassembly of the basin-type pipe and the corrosion monitoring subsystem.

[0014] Furthermore, in an optional embodiment, the basin-type pipe includes a connecting pipe section and a basin structure. The basin structure includes a basin edge and a basin bottom. The basin bottom with the basin structure is connected to the basin edge through matching flanges, which facilitates flexible disassembly for sample replacement.

[0015] In one embodiment, the material of the test piece is determined according to the material of the pipeline to be tested, and is used to simulate the internal corrosion state of the pipeline in service.

[0016] In a preferred embodiment, the detection device of the corrosion monitoring subsystem is a miniature electromagnetic ultrasonic detection device connected to a micro-controlled detection driver. Based on the set detection instructions of the micro-controlled detection driver, the device detects different positions of the test piece using ultrasonic signals and converts them into corresponding thickness data. The set detection instructions include the detection cycle and the moving speed. The micro-controlled detection driver is a microcontroller or a built-in chip.

[0017] Specifically, in one optional embodiment, the detection device includes an integrated ultrasonic detector and a signal acquisition unit. The ultrasonic detector emits ultrasonic signals that penetrate the wall of the basin-type pipe and the air between the pipe wall and the test piece in a non-contact, liftable detection mode to test the thickness data of the test piece at the corresponding position. The signal acquisition unit is used to receive the returned ultrasonic signals and convert them into corresponding thickness data.

[0018] In one embodiment, the detection drive track plate of the corrosion monitoring subsystem is the same size as the test piece, and the track rows are set according to the size to form a detection line.

[0019] Optionally, in one embodiment, the bottom of the detection device is provided with a chuck structure, which works in conjunction with the track of the track plate to realize the movement of the detection device.

[0020] Furthermore, in one embodiment, the corrosion data results analyzed based on the specimen thickness data include corrosion data at local detection locations and total corrosion data for the entire specimen; the total corrosion data for the entire specimen is calculated according to the following logic: uniform corrosion = total wall thickness loss / original total wall thickness.

[0021] On the other hand, based on the application aspects of the system described in any one or more of the above embodiments, the present invention also provides a method for real-time monitoring of corrosion inside liquid accumulation pipes. This method is applied to the system described in any one or more of the above embodiments, and the method includes:

[0022] Monitoring pipelines, including basin-type pipelines and parallel pipelines, are pre-installed on the pipeline sections to be monitored, where monitoring is required. These pipelines are used to store accumulated liquid and recreate the corrosive environment of the pipeline. Test pieces are placed in the basin-type pipelines.

[0023] The thickness data of test pieces at different locations in a basin-type pipeline were monitored non-contactly using the detection device of the corrosion monitoring subsystem;

[0024] The corrosion data determination agency receives the specimen thickness data detected by the corrosion monitoring subsystem, analyzes the corresponding corrosion data results based on the specimen thickness data, and outputs them.

[0025] Compared with the closest prior art, the present invention also has the following beneficial effects:

[0026] This invention provides a real-time monitoring system and method for corrosion inside a liquid-accumulating pipeline. The system connects to a monitoring pipeline and sets up a basin-type pipeline in parallel to store the liquid in the pipeline and recreate the corrosion environment of the pipeline. A test piece is placed in the basin-type pipeline. The basin-type pipeline can accurately reflect the in-service working environment of the pipeline under test, which fundamentally ensures the authenticity of the monitoring conditions and is conducive to achieving high-precision detection.

[0027] The corrosion monitoring subsystem is installed in the basin-type pipeline and includes a detection device, a detection drive track plate, and a micro-controlled detection driver. It is used to monitor the thickness data of the test piece at different positions in the basin-type pipeline without contact based on the set line of the track plate. It adopts non-contact monitoring to achieve non-destructive testing, avoids the influence of detection factors on the monitoring results, and is easy to operate. It improves the accuracy of monitoring while ensuring the timeliness of operation and controlling manpower and equipment costs.

[0028] The corrosion data determination agency receives the test piece thickness data detected by the corrosion monitoring subsystem, analyzes the corresponding corrosion data based on the test piece thickness data, and outputs the results. The corrosion data is displayed to the user in a clear and real-time manner, allowing the user to understand the dynamic corrosion situation in a timely manner.

[0029] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of a real-time monitoring system for corrosion inside a liquid accumulation pipe provided in an embodiment of the present invention;

[0032] Figure 2 This is a flowchart illustrating a method for real-time monitoring of corrosion inside a liquid-accumulating pipe, provided in another embodiment of the present invention. Detailed Implementation

[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples. Those skilled in the art will then fully understand how the present invention uses technical means to solve technical problems and achieve technical effects, and will be able to implement the present invention specifically based on the above-described implementation process. It should be noted that, as long as there is no conflict, the various embodiments and features of the present invention can be combined with each other, and the resulting technical solutions are all within the protection scope of the present invention.

[0034] Although the flowchart describes the operations as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. The order of the operations can be rearranged. A process can terminate when its operation is complete, but it may also have additional steps not included in the diagram. A process can correspond to a method, function, procedure, subroutine, subroutine, etc.

[0035] Computer equipment includes user equipment and network equipment. User equipment or clients include, but are not limited to, computers, smartphones, and PDAs (Personal Digital Assistants); network equipment includes, but is not limited to, a single network server, a server group consisting of multiple network servers, or a cloud based on cloud computing consisting of a large number of computers or network servers. Computer equipment can operate independently to implement this invention, or it can connect to a network and implement this invention through interaction with other computer devices within the network. The network in which the computer equipment resides includes, but is not limited to, the Internet, wide area networks (WANs), metropolitan area networks (MANs), local area networks (LANs), and VPN networks.

[0036] The terms “first,” “second,” etc., may be used herein to describe various units, but these units should not be limited by these terms; they are used merely to distinguish one unit from another. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items. When a unit is referred to as “connected” or “coupled” to another unit, it may be directly connected or coupled to said other unit, or there may be intermediate units present.

[0037] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms “a” and “an” as used herein are also intended to include the plural. It should also be understood that the terms “comprising” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, without excluding the presence or addition of one or more other features, integers, steps, operations, units, components, and / or combinations thereof.

[0038] During oil and gas field production and transportation, in-service equipment and pipelines are essentially always operating in harsh environments. These environments present multiple challenges, including external factors such as high temperature, high pressure, and high flow rate, and internal factors such as free water, acidic components (e.g., carbon dioxide, hydrogen sulfide), salts, atmospheric oxygen, and bacteria. The combined effects of these internal and external environments can easily cause internal corrosion in oil and gas pipelines. Furthermore, the presence of accumulated fluids can further accelerate pipeline corrosion.

[0039] As crucial equipment in oil and gas production facilities, the safe operation of oil and gas pipelines is of paramount importance, making pipeline corrosion monitoring technology a widely studied research area. Current main methods for pipeline corrosion monitoring include physical strip methods, electrochemical methods, and ultrasonic methods. Each method has its advantages but also limitations: the strip method is economical, simple, and widely used, but suffers from cumbersome operation, long monitoring cycles, and the tendency for monitoring results to be averaged; the electrochemical method allows for continuous monitoring, with the electrochemical noise method providing localized corrosion monitoring results, but this method has high requirements for the corrosive medium and the sample, and the circuitry may affect the original corrosion morphology within the pipeline; currently, the ultrasonic method is the most commonly used non-destructive monitoring method, offering a wide monitoring range and convenient operation, but it is currently mainly used for timed and fixed-point monitoring of pipeline wall thickness, incurring high labor costs and unable to achieve real-time monitoring.

[0040] Overall, existing monitoring measures mainly target CO2 corrosion and Cl-. - Uniform corrosion is not very effective against heterogeneous corrosion such as bacteria or biofilms, limiting its application. Furthermore, it is complex and costly to operate. In addition, some simulation devices used for corrosion monitoring lack a 100% accurate representation of corrosion factors and the environment.

[0041] To address the aforementioned problems, this invention provides a real-time monitoring system and method for internal corrosion in liquid-accumulating pipelines, forming an online monitoring system for internal corrosion in pipelines with characteristics such as "in-situ non-destructive online monitoring, no need for frequent disassembly and assembly, wide applicability to a wide range of media, ability to provide information on uniform and localized corrosion, and real-time detection."

[0042] The structural components, connection methods, and functional principles of the system according to embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Although the logical order of each operation is shown in the description of the system's structural operation, in some cases, the operations shown or described may be performed in a different order than that shown here.

[0043] Example 1

[0044] Figure 1 This diagram illustrates a real-time monitoring system for corrosion inside a liquid-accumulating pipe according to Embodiment 1 of the present invention. (Refer to...) Figure 1 It can be seen that the system includes:

[0045] Pipeline monitoring, corrosion monitoring subsystem, and corrosion data determination mechanism;

[0046] The monitoring pipeline is connected at both ends to the pipe sections to be monitored in the working pipeline, including basin-type pipelines and parallel pipelines arranged parallel to basin-type pipelines.

[0047] The parallel pipeline is used for backup transport operations; the basin-type pipeline is used to store accumulated liquid in the pipeline, and to simulate the pipeline corrosion environment for monitoring test pieces.

[0048] The corrosion monitoring subsystem is installed in the basin-type pipe section and includes a detection device, a micro-controlled detection driver, and a detection drive track plate. It is used for non-contact monitoring of the thickness data of the test piece at different positions in the basin-type pipe. The approximate running trajectory of the piezoelectric displacement driver can be referenced from the dotted line path in the track plate.

[0049] The corrosion data determination mechanism is connected to the corrosion monitoring subsystem and is used to receive the specimen thickness data detected by the corrosion monitoring subsystem, analyze the corresponding corrosion data results in conjunction with the set thickness change parameters and corrosion data association library, and output the results.

[0050] The monitoring pipeline is connected to the section of the working pipeline that requires monitoring via a flange; this facilitates the simple installation of the real-time monitoring system for internal corrosion of liquid accumulation in pipelines provided in this embodiment of the invention, ensuring that monitoring does not interfere with normal oil and gas operations after installation. Figure 1 As shown, the system can be installed at the station and the required monitoring points of the external pipeline. The two ends of the monitoring pipeline are connected to the pipe section to be monitored through flanges [2-1] and [2-6], respectively. The fluid direction is: [2-1. flange] is the inlet and [2-6. flange] is the outlet.

[0051] Valves are installed on the parallel pipeline, such as Figure 1 As shown, valve [1-1] is installed on the parallel pipeline; valves are respectively installed at the inlet and outlet ends of the basin-type pipeline, such as... Figure 1As shown, valve [1-2] is installed at the input end of the basin-type pipeline, and valve [1-3] is installed at the output end. When the corrosion monitoring subsystem of this embodiment needs to be operated, valve [1-1] in the parallel pipeline is closed, and valves [1-2] and [1-3] in the basin-type pipeline are opened to allow gas to be transported through the basin-type pipeline. In practical applications, the parallel pipeline serves as a backup gas transmission pipeline. The purpose of valve [1-1] on it is to allow for the replacement of test pieces and maintenance of the monitoring box without interrupting production, which plays an important role in the production process, especially for high-yield gas wells, where corrosion is often more severe. Maintenance and replacement can be carried out without interrupting production, ensuring the high-yield and stable operation of the gas well. However, high-yield gas wells often do not require valve 1-1 to be closed during monitoring, so that the gas volume and flow rate in the basin-type pipeline are consistent with those of the normal production pipeline. When disassembling the basin-type structure, valve 1-3 is also closed to prevent leakage caused by gas coming from the parallel pipeline.

[0052] The basin-shaped pipe is connected to the parallel pipe at both ends via flange structures, facilitating flexible disassembly of the basin-shaped pipe; for example Figure 1 As shown, the two ends of the basin-type pipe are connected to the parallel pipe via flanges [2-2] and [2-5] respectively through valves. In actual application, when the pipe section to be monitored does not meet the monitoring requirements, valve [1-1] can be opened and valves [1-2] and [1-3] can be closed, allowing the basin-type pipe and the associated corrosion monitoring subsystem to be flexibly disassembled. When monitoring is required again, it is also convenient to reinstall the basin-type pipe and the associated corrosion monitoring subsystem via flanges [2-2] and [2-5].

[0053] Specifically, in an optional embodiment, to facilitate selective disassembly of the basin-type pipe when replacing test pieces, the basin-type pipe is provided to include a connecting pipe section and a basin structure. The basin structure includes a basin edge and a basin bottom, wherein the basin edge is the connecting part where the connecting pipe section evolves into the basin structure, and has a certain curvature, such as... Figure 1 In [3-1] and [3-3], the bottom of the basin has a flat rectangular structure, and the overall basin structure belongs to the shape of a lucky bag, such as Figure 1 [3-2]; The dimensions of the bottom of the basin-type structure are determined based on the dimensions of the test piece and the dimensions of the detection drive track plate.

[0054] In a preferred embodiment, the bottom of the basin with the basin structure is connected to the edge of the basin via matching flanges. Based on this, when there is a need to replace the test piece, the basin bottom structure of the basin pipe can be disassembled and disassembled in a targeted manner after opening valve [1-1] and closing valves [1-2] and [1-3], so as to conveniently replace the test piece.

[0055] In a preferred embodiment, the basin-shaped pipe is made of a non-conductive material. This non-conductive basin-shaped pipe effectively stores accumulated liquid, minimizing the corrosive environment. Furthermore, the pipe material is specially customized to meet the non-conductive property, allowing the detector signal to pass through without being detected during monitoring.

[0056] In this embodiment of the invention, the test piece used for the basin-type pipeline is a large test piece. The material of the test piece is determined according to the material of the pipeline to be tested, and it is used to simulate the internal wall corrosion state of the in-service pipeline. The distance between the test piece and the basin-type pipeline is less than 2mm, which allows for convenient monitoring by an ultrasonic detector. In addition, the periodic removal and replacement cycle of the test piece needs to be set according to the monitoring data to ensure that the monitoring samples at each monitoring location are brand new and uncontaminated.

[0057] In practice, the monitoring of corrosion test pieces (coated pieces) essentially involves monitoring the continuous "corrosion" over a period of time. By measuring the weight loss of the test piece, the corrosion rate is calculated. When a set corrosion rate condition is reached, it is determined that the test piece needs to be replaced. For example, it is generally required that the test piece be replaced when the corrosion rate is less than or equal to 0.0076 mm / a. Of course, this standard can be customized according to the needs of different users. For example, if our probe is measuring wall thickness, it can be set according to the wall thinning rate.

[0058] The detection device of the corrosion monitoring subsystem adopts a miniature electromagnetic ultrasonic detection device, which is connected to a micro-controlled detection driver. According to the detection command set by the micro-controlled detection driver, it detects different positions of the test piece based on ultrasonic signals and converts them into corresponding thickness data. The detection command set includes the detection cycle and the moving speed. The micro-controlled detection driver adopts a microcontroller or a built-in chip.

[0059] The miniature electromagnetic ultrasonic detector used in this embodiment of the invention has the characteristics of non-contact and removable testing. The emitted signal can penetrate the non-conductive basin-shaped pipe 3-1 and the air between the pipe and the test piece, thereby directly and effectively testing the thickness of each position of the large test piece. The test can be performed through the protective layer without scraping open the outer layer of the pipe, and the operation is simple.

[0060] The detection device includes an integrated ultrasonic detector and a signal acquisition unit. The ultrasonic detector emits ultrasonic signals that penetrate the wall of the basin-type pipe and the air between the pipe wall and the test piece in a non-contact, liftable detection mode to test the thickness data of the test piece at the corresponding position.

[0061] The signal acquisition device is used to receive the returned ultrasonic signals and convert them into corresponding thickness data.

[0062] The detection drive track plate of the corrosion monitoring subsystem is fixedly installed below the bottom of the basin-type pipe by a matching bracket; the detection drive track plate adopts a piezoelectric displacement actuator track plate.

[0063] The bottom of the micro-controlled detection driver is equipped with a chuck structure. The chuck structure works in conjunction with the track plate to move the detection device. Specifically, the micro-controlled detection driver controls the movement along the track plate at a constant speed according to the set detection command via piezoelectric drive. An example of the approximate displacement trajectory can be seen in the dotted line part of the track plate in the attached figure. Based on this, large monitoring test pieces can be detected in sections, ultimately achieving the purpose of localized section monitoring.

[0064] The signal acquisition unit of the detection device is used to collect the signals collected by [5. Miniature electromagnetic ultrasonic detector]. After being transmitted to the corrosion data determination mechanism, the corrosion data determination mechanism analyzes the corresponding corrosion data information based on the collected thickness signals. The corrosion data information can include corrosion data at local detection locations and overall corrosion data of the specimen; that is: ① data can be processed according to the moving route to understand the local corrosion of the specimen through the thickness at each point; ② the data can also be summarized to understand the uniform corrosion of the specimen. The signal from the acquisition unit can be transmitted back in real time, thereby achieving the purpose of real-time monitoring. The uniform corrosion data is calculated according to the following logic: Uniform corrosion = Total wall thickness loss / Original total wall thickness.

[0065] On the other hand, in the preferred embodiment, in order to save computing time and output results in a timely manner during actual detection applications, the corresponding corrosion data results can be analyzed and output by combining the set thickness change parameters with the corrosion data association library.

[0066] The thickness variation parameter-corrosion data association library is established based on the historical corrosion records of the pipeline corresponding to the test piece material.

[0067] In the real-time monitoring system for corrosion inside pipes with accumulated liquid provided in this embodiment of the invention, each module or unit structure can operate independently or in combination according to the actual device connection requirements and signal processing requirements to achieve the corresponding technical effects.

[0068] Example 2

[0069] The above-described embodiments of the present invention have provided a detailed description of the system. Based on other aspects of the system described in any one or more of the above embodiments, the present invention also provides a method for real-time monitoring of corrosion inside liquid-accumulating pipes. This method is applied to the real-time monitoring system for corrosion inside liquid-accumulating pipes described in any one or more of the above embodiments. Specific embodiments are given below for detailed description.

[0070] Specifically, Figure 2The diagram shows a flowchart of the real-time monitoring method for corrosion inside a liquid accumulation pipe provided in an embodiment of the present invention. Figure 2 As shown, the method includes:

[0071] A monitoring pipeline, including a basin-type pipeline and a parallel pipeline, is pre-installed on the pipe section to be tested where monitoring is required. This is used to store the accumulated liquid in the pipeline and recreate the corrosion environment of the pipeline. A test piece is placed in the basin-type pipeline.

[0072] The thickness data of test pieces at different locations in a basin-type pipeline were monitored non-contactly using the detection device of the corrosion monitoring subsystem;

[0073] The corrosion data determination agency receives the specimen thickness data detected by the corrosion monitoring subsystem, analyzes the corresponding corrosion data results based on the specimen thickness data, and outputs them.

[0074] The method described in this embodiment is implemented based on the real-time corrosion monitoring system inside the liquid accumulation pipeline, which includes:

[0075] Monitoring pipelines, corrosion monitoring subsystems, and corrosion data determination mechanisms;

[0076] The monitoring pipeline is connected at both ends to the pipe sections to be monitored in the working pipeline. The monitoring pipeline includes a basin-type pipeline and a parallel pipeline arranged parallel to the basin-type pipeline. A test piece is placed in the basin-type pipeline.

[0077] The parallel pipeline is used to replace the pipe section to be tested for conveying operations; the basin-type pipeline is used to store the accumulated liquid in the pipeline to restore the corrosive environment of the pipeline for the test piece.

[0078] The corrosion monitoring subsystem is installed in the basin-type pipe section and includes a detection device, a detection drive track plate, and a micro-controlled detection driver. It is used to monitor the thickness data of the test piece at different positions in the basin-type pipe without contact based on the set line of the track plate.

[0079] The corrosion data determination mechanism is connected to the corrosion monitoring subsystem and is used to receive the specimen thickness data detected by the corrosion monitoring subsystem, analyze the corresponding corrosion data results based on the specimen thickness data, and output them.

[0080] Furthermore, the monitoring pipeline is connected to the section of the working pipeline that requires monitoring via a flange; this facilitates the installation of the real-time monitoring system for internal corrosion of liquid accumulation in pipelines provided in this embodiment of the invention based on simple operation, and after installation, monitoring does not affect normal oil and gas operations; the fluid direction in the pipeline is: [2-1. flange] is the inlet, and [2-6. flange] is the outlet.

[0081] In one embodiment, the monitoring pipeline is connected to the pipe section to be tested via a flange. Valves are installed on the parallel pipeline, and valves are installed at the input and output ends of the basin-type pipeline. When the corrosion monitoring subsystem of this embodiment needs to be operated, valve [1-1.] on the parallel pipeline is closed, and valves [1-2.] and [1-3.] on the basin-type pipeline are opened to allow gas to be transported via the basin-type pipeline. The parallel pipeline serves as a backup gas transmission pipeline. Valve [1-1.] on it is installed to allow for the replacement of test pieces and maintenance of the monitoring box without interrupting production. This plays a crucial role in the production process, especially for high-yield gas wells, where corrosion is often more severe. Uninterrupted maintenance and replacement ensure the high-yield and stable operation of the gas well. However, in high-yield gas wells, valve [1-1.] is not closed during monitoring to maintain the gas volume and flow rate in the basin-type pipeline consistent with the normal production pipeline. When disassembling the basin-type structure, valve [1-3.] is also closed to prevent leakage caused by gas from the parallel pipeline.

[0082] Alternatively, in one embodiment, the basin-shaped pipe is made of a non-conductive pipe material so that the detector signal passes through without being tested during monitoring.

[0083] In a preferred embodiment, the basin-type pipe is connected to the parallel pipe via a detachable connection, allowing for flexible assembly and disassembly of the basin-type pipe and the corrosion monitoring subsystem. Both ends of the basin-type pipe are connected to the parallel pipe via flange structures, facilitating easy disassembly of the basin-type pipe. The basin-type pipe is connected to the parallel pipe via flanges [2-2] and [2-5] respectively, through valves. In practical applications, when the section to be monitored is not required for monitoring, valve [1-1] can be opened, and valves [1-2] and [1-3] can be closed, allowing for flexible disassembly of the basin-type pipe and the associated corrosion monitoring subsystem. When re-monitoring is required, the basin-type pipe and the associated corrosion monitoring subsystem can also be easily reinstalled via flanges [2-2] and [2-5].

[0084] Furthermore, in an optional embodiment, the basin-type pipe includes a connecting pipe section and a basin structure. The basin structure includes a basin edge and a basin bottom. The basin bottom with the basin structure is connected to the basin edge through matching flanges, which facilitates flexible disassembly for sample replacement.

[0085] The basin-type pipeline includes connecting pipe sections and a basin structure. The basin structure includes a basin edge and a basin bottom. The basin edge [3-1] and [3-3] are the connecting parts that evolve from the connecting pipe section into the basin structure and have a certain curvature. The basin bottom [3-2] is a rectangular flat structure. The overall basin structure is a lucky bag-like shape. The size of the basin bottom of the basin structure is determined according to the size of the test piece and the size of the detection drive track plate.

[0086] In one embodiment, the material of the test piece is determined according to the material of the pipeline to be tested, and is used to simulate the internal corrosion state of the pipeline in service.

[0087] In a preferred embodiment, the detection device of the corrosion monitoring subsystem is a miniature electromagnetic ultrasonic detection device connected to a micro-controlled detection driver. Based on the set detection instructions of the micro-controlled detection driver, the device detects different positions of the test piece using ultrasonic signals and converts them into corresponding thickness data. The set detection instructions include the detection cycle and the moving speed. The micro-controlled detection driver is a microcontroller or a built-in chip.

[0088] Specifically, in one optional embodiment, the detection device includes an integrated ultrasonic detector and a signal acquisition unit. The ultrasonic detector emits ultrasonic signals that penetrate the wall of the basin-type pipe and the air between the pipe wall and the test piece in a non-contact, liftable detection mode to test the thickness data of the test piece at the corresponding position. The signal acquisition unit is used to receive the returned ultrasonic signals and convert them into corresponding thickness data.

[0089] In one embodiment, the detection drive track plate of the corrosion monitoring subsystem is the same size as the test piece, and the track rows are set according to the size to form a detection line.

[0090] Optionally, in one embodiment, the bottom of the detection device is provided with a chuck structure, which works in conjunction with the track of the track plate to realize the movement of the detection device.

[0091] Furthermore, in one embodiment, the corrosion data results analyzed based on the specimen thickness data include corrosion data at local detection locations and total corrosion data for the entire specimen; the total corrosion data for the entire specimen is calculated according to the following logic: uniform corrosion = total wall thickness loss / original total wall thickness.

[0092] For the foregoing method embodiments, in order to simplify the description, they are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0093] It should be noted that in other embodiments of the present invention, the method can also be combined with one or more of the above embodiments to obtain a new method for real-time monitoring of corrosion inside liquid accumulation pipes, so as to realize real-time dynamic monitoring of pipe corrosion.

[0094] Example 3

[0095] It should be noted that, based on the methods in any one or more embodiments of the present invention described above, the present invention also provides a storage medium storing program code that can implement the methods described in any one or more embodiments. When the program code is executed by the operating system, it can implement the real-time monitoring method for corrosion inside liquid accumulation pipes as described above.

[0096] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0097] The phrase "an embodiment" in the specification means that a specific feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0098] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A real-time monitoring system for corrosion inside a liquid-accumulating pipe, characterized in that, The system includes: a monitoring pipeline, a corrosion monitoring subsystem, and a corrosion data determination mechanism; The monitoring pipeline is connected at both ends to the pipe sections to be monitored in the working pipeline. The monitoring pipeline includes a basin-type pipeline and a parallel pipeline arranged parallel to the basin-type pipeline. A test piece is placed in the basin-type pipeline. The parallel pipeline is used to replace the pipe section to be tested for conveying operations; the basin-type pipeline is used to store the accumulated liquid in the pipeline to restore the corrosive environment of the pipeline for the test piece. The corrosion monitoring subsystem is installed in the basin-type pipe section and includes a detection device, a detection drive track plate, and a micro-controlled detection driver. It is used to monitor the thickness data of the test piece at different positions in the basin-type pipe without contact based on the set line of the track plate. The corrosion data determination mechanism is connected to the corrosion monitoring subsystem and is used to receive the specimen thickness data detected by the corrosion monitoring subsystem, analyze the corresponding corrosion data results based on the specimen thickness data, and output them.

2. The system according to claim 1, characterized in that, The monitoring pipeline is connected to the pipe section to be tested via a flange. A valve is installed on the parallel pipeline, and valves are installed at the input and output ends of the basin-type pipeline, respectively.

3. The system according to claim 2, characterized in that, The basin-shaped pipe is made of non-conductive material so that the detector signal can pass through without being tested during monitoring.

4. The system according to claim 3, characterized in that, The basin-type pipe is connected to the parallel pipe in a detachable manner to allow for flexible assembly and disassembly of the basin-type pipe and the corrosion monitoring subsystem.

5. The system according to claim 1 or 3, characterized in that, The basin-type pipe includes connecting pipe sections and a basin structure. The basin structure includes a basin edge and a basin bottom. The basin bottom with the basin structure is connected to the basin edge through matching flanges, which facilitates flexible disassembly for test piece replacement.

6. The system according to claim 1, characterized in that, The material of the test piece is determined according to the material of the pipeline to be tested, and is used to simulate the internal corrosion state of the pipeline in service.

7. The system according to claim 1, characterized in that, The detection device of the corrosion monitoring subsystem adopts a miniature electromagnetic ultrasonic detection device, which is connected to a micro-controlled detection driver. According to the detection command set by the micro-controlled detection driver, it detects different positions of the test piece based on ultrasonic signals and converts them into corresponding thickness data. The detection command set includes the detection cycle and the moving speed. The micro-controlled detection driver adopts a microcontroller or a built-in chip.

8. The system according to claim 1, characterized in that, The detection device includes an integrated ultrasonic detector and a signal acquisition unit. The ultrasonic detector emits ultrasonic signals that penetrate the wall of the basin-shaped pipe and the air between the pipe wall and the test piece in a non-contact, liftable detection mode to test the thickness data of the test piece at the corresponding position. The signal acquisition unit is used to receive the returned ultrasonic signals and convert them into corresponding thickness data.

9. The system according to claim 1, characterized in that, The detection drive track plate of the corrosion monitoring subsystem is the same size as the test piece, and the track rows are set according to the size to form a detection line.

10. The system according to claim 1, characterized in that, The bottom of the detection device is equipped with a chuck structure, which works in conjunction with the track plate to enable the movement of the detection device.

11. The system according to claim 1, characterized in that, The corrosion data results analyzed based on the specimen thickness data include corrosion data at local detection locations and overall corrosion data of the specimen; the overall corrosion data of the specimen is calculated according to the following logic: uniform corrosion = total wall thickness loss / original total wall thickness.

12. A method for real-time monitoring of corrosion inside a liquid-accumulating pipe, characterized in that, The method is applied to the system according to any one of claims 1 to 11, and the method comprises: Monitoring pipelines, including basin-type pipelines and parallel pipelines, are pre-installed on the pipeline sections to be monitored, where monitoring is required. These pipelines are used to store accumulated liquid and recreate the corrosive environment of the pipeline. Test pieces are placed in the basin-type pipelines. The thickness data of test pieces at different locations in a basin-type pipeline were monitored non-contactly using the detection device of the corrosion monitoring subsystem; The corrosion data determination agency receives the specimen thickness data detected by the corrosion monitoring subsystem, analyzes the corresponding corrosion data results based on the specimen thickness data, and outputs them.

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