CN213600558U - Multi-channel self-checking type electrochemical noise corrosion monitoring probe - Google Patents
Multi-channel self-checking type electrochemical noise corrosion monitoring probe Download PDFInfo
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- CN213600558U CN213600558U CN202022117843.3U CN202022117843U CN213600558U CN 213600558 U CN213600558 U CN 213600558U CN 202022117843 U CN202022117843 U CN 202022117843U CN 213600558 U CN213600558 U CN 213600558U
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Abstract
The utility model provides a multichannel self-checking formula electrochemistry noise corrosion monitoring probe. The corrosion monitoring probe includes: the corrosion simulation module, the change-over switch and the data measurement module are connected in sequence; the corrosion simulation module comprises a corrosion piece for simulating the corrosion state of the monitored object and a corrosion piece for calibration; the change-over switch is used for controlling the data communication relation between the data measurement module and the corrosion piece; the data measurement module is used for carrying out electrochemical noise test and self-inspection. The corrosion monitoring probe has accurate and reliable test result and is a local corrosion monitoring device which can be recycled for a long time.
Description
Technical Field
The utility model relates to a corrosion monitoring probe of electrochemistry noise especially relates to a multichannel self-checking formula electrochemistry noise corrosion monitoring probe.
Background
In recent years, with the deep development of oil and gas resources, the water injection technology is widely applied to various large oil and gas fields, and a remarkable yield increasing effect is achieved. Meanwhile, the failure of the well bore of the water injection well is frequently found, mainly because the injected water has high mineralization and is easy to scale, and the injected water contains corrosion influence factors such as dissolved oxygen, bacteria and the like. Conventional corrosion monitoring technologies, such as inductance probes, resistance probes, and the like, can only monitor general corrosion through corrosion weight loss, and cannot monitor local corrosion. Although the coupon monitoring technology can monitor general corrosion and local corrosion simultaneously, the coupon monitoring technology has a long period and is poor in timeliness. In contrast, electrochemical noise has a better monitoring effect on localized corrosion. However, the current patents related to the electrochemical noise corrosion monitoring probe are few, and are mostly used for monitoring the corrosion of the surface pipeline, and are not suitable for monitoring the corrosion environment in the well. In addition, the monitoring probe is interfered more in complicated changeable operating mode environment in the pit, and monitoring signal is various, and long-term work's measurement system measuring result can take place the skew, leads to the monitoring result distortion.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model aims to provide a multichannel self-checking formula electrochemistry noise corrosion monitoring probe. The corrosion monitoring probe monitors the corrosion condition by using the electrochemical noise, has accurate and reliable monitoring result, and is a local corrosion monitoring device capable of being recycled for a long time.
In order to achieve the above object, the utility model provides a multichannel self-checking formula electrochemistry noise corrosion monitoring probe, the corrosion monitoring probe includes: the corrosion simulation module, the change-over switch and the data measurement module are connected in sequence; the corrosion simulation module comprises a corrosion piece for simulating the corrosion state of the monitored object and a corrosion piece for calibration; the change-over switch is used for controlling the data communication relation between the data measurement module and the corrosion piece; the data measurement module is used for carrying out electrochemical noise test and self-inspection.
In the corrosion monitoring probe, the data measurement module obtains the corrosion rate and the local corrosion index by measuring an electrochemical noise signal of a metal material in a certain corrosion environment and calculating a noise resistance. Through the peak type analysis of noise current and potential, the method can be used for researching the behaviors of pitting germination and growth processes in the metal service process and the spectrum characteristics of nucleation rate, amplitude, recovery rate and the like of noise peaks at different corrosion stages.
According to a specific embodiment of the present invention, the data measurement module generally comprises an electrochemical noise test module; the electrochemical noise test module generally comprises a logic operation unit, a control unit and a storage unit, wherein the logic operation unit is used for receiving and calculating an electrochemical signal transmitted by a corrosion piece, the control unit is used for detecting signal control, and the storage unit is used for storing an operation result of the logic operation unit.
According to the utility model discloses a concrete implementation scheme, the material that is used for simulating the corrosion strip of monitoring object's corrosion state is general the same with monitoring object's material, for example this corrosion strip can adopt stainless steel, carbon steel etc. the same with tubular column material in the pit. And during testing, the corrosion piece is placed in a testing environment and is fully contacted with a corrosion medium, so that the corrosion piece generates corrosion with the same degree as the monitored object, and the corrosion condition of the monitored object in the same environment can be equivalently obtained by testing the corrosion condition of the corrosion piece. In some embodiments, the corrosion slices used for simulating the corrosion state of the monitored object are more than two groups, and the thickness of each group can be different, so that the corrosion slices with the proper thickness can be selected according to the specific requirements of the monitoring period and the service life.
According to a specific embodiment of the present invention, the material of the corrosion plate for calibration is generally a corrosion-resistant conductive material, such as corrosion-resistant alloy, and corrosion does not occur in the test environment. Before or during the corrosion test, the data measurement module can use the corrosion piece as a sample to carry out calibration and self-inspection, so that the excessive data drift is avoided, and the test accuracy is improved.
In a specific embodiment of the present invention, the simulated corrosion module may include three corrosion sheets, wherein the two corrosion sheets have different thicknesses but the same material, and are both materials of the monitoring object; the other group of corrosion sheets is made of corrosion-resistant alloy.
In accordance with a particular embodiment of the present invention, the corrosion monitoring probe generally includes a data storage device for storing data generated by the data measurement module. In some embodiments, the data store is generally connected to the data measurement module, for example, via a communication line.
According to a specific embodiment of the present invention, the corrosion monitoring probe may further comprise a power source for supplying power to the data measurement module and the data storage. In some embodiments, the power source is generally located between the data measurement module and the data storage, and the power source may be connected to the data measurement module and the data storage, respectively.
In accordance with a particular embodiment of the present invention, the corrosion monitoring probe generally includes a housing for housing components of the corrosion monitoring probe other than the corrosion coupon. The housing is typically made of a corrosion resistant material, such as stainless steel.
According to the utility model discloses a specific embodiment, the inside of above-mentioned shell is generally filled the withstand voltage non-metallic material of temperature resistance, like the highly compressed resin of high temperature resistance, this withstand voltage non-metallic material of temperature resistance can the fixed corrosion piece, improves simultaneously the compressive property of corrosion monitoring probe.
According to a specific embodiment of the present invention, the corrosion monitoring probe generally further comprises a corrosion plate protective cover for isolating the corrosion plate from impurities and suspended solids and preventing damage to the corrosion plate during the installation process. The corrosion plate protective cover is generally arranged on the periphery of the simulated corrosion module.
The beneficial effects of the utility model reside in that: the utility model provides a multichannel self-checking formula electrochemistry noise corrosion monitoring probe can utilize electrochemistry noise to carry out the local corrosion monitoring in the pit, measures accurate, sensitivity is high, but cyclic utilization, has the significance to developing oil gas field tubular column local corrosion monitoring work in the pit.
Drawings
Fig. 1 is a schematic structural diagram of a multi-channel self-test electrochemical noise corrosion monitoring probe in embodiment 1.
FIG. 2 is a schematic diagram showing the positional relationship among three corrosion sheets a, b and c in example 1.
Description of the symbols
The system comprises a corrosion sheet protection cover 1, a corrosion sheet simulation module 2, a shell 3, an intelligent change-over switch 4, a switch contact 5, a connecting line 6, a contact 7, a data measurement module 8, a connecting line 9, a connecting line 10, a connecting line 14 and a connecting line 15, a communication line 11, a power supply 12, high-temperature and high-pressure resistant resin 13, a data storage 16 and an aerial plug 17.
Detailed Description
In order to clearly understand the technical features, objects and advantages of the present invention, the following detailed description is given to the technical solution of the present invention, but the technical solution of the present invention is not limited to the limit of the implementable range of the present invention.
Example 1
The embodiment provides a multi-channel self-detection type electrochemical noise corrosion monitoring probe, and fig. 1 is a schematic structural diagram of the corrosion monitoring probe. As shown in fig. 1, the corrosion monitoring probe includes: corrosion piece safety cover 1, shell 3, simulation corrosion module 2, intelligent change over switch 4, data measurement module 8, power 12 and data memory 16. Wherein, the corrosion simulation module 2 is positioned inside the corrosion piece protective cover 1, and the intelligent transfer switch 4, the data measurement module 8, the power supply 12 and the data storage 16 are positioned inside the shell 3.
The corrosion protection sheet 1 is connected with the shell 3 through threads. The interior of the case 3 is filled with a resin 13 resistant to high temperature and high pressure. The outer diameters of the corrosion piece protection cover 1 and the shell 3 are both 30mm, and the material is 316L stainless steel.
The simulated corrosion module 2 comprises three groups of corrosion pieces a, b and c. One end of each of the three corrosion sheets is connected with the intelligent change-over switch 4 and fixed by high-temperature and high-pressure resistant resin 13. Fig. 2 is a schematic diagram of the positional relationship among three corrosion sheets a, b, and c, and as shown in fig. 2, the three corrosion sheets are arranged in a delta shape.
The group a corrosion slice consists of three corrosion slices a1, a2 and a3, the material is L80, and the material is the same as that of the underground pipe column. The a1, a2 and a3 corrosion pieces are 3mm long and 0.5mm thick and are arranged in a delta shape, and the distance between the corrosion pieces is 0.1 mm.
The group b corrosion slice consists of three corrosion slices b1, b2 and b3, is made of L80 and is made of the same material as the underground pipe column. The length of the b1, the b2 and the b3 corrosion pieces is 3mm, the thickness of the corrosion pieces is 1mm, the corrosion pieces are arranged in a delta shape, and the distance between the corrosion pieces is 0.5 mm. The thickness and the interval of the group b corrosion pieces are larger than those of the group a corrosion pieces, the service life is longer, and the device is suitable for long-term monitoring.
The group c corrosion pieces are composed of three corrosion pieces c1, c2 and c3, and the material is corrosion-resistant alloy. The length of each corrosion piece of c1, c2 and c3 is 3mm, the thickness of each corrosion piece is 0.5mm, the corrosion pieces are arranged in a delta shape, and the distance between the corrosion pieces is 0.1 mm.
The intelligent change-over switch 4 is positioned between the corrosion simulation module 2 and the data measurement module 8. And one end of the intelligent change-over switch 4 close to the data measurement module 8 is provided with three switch contacts 5 corresponding to three groups of corrosion sheets a, b and c. The data measurement module 8 is provided with three contacts 7 near the intelligent transfer switch 4, and the three contacts are independently connected with the three switch contacts 5 of the intelligent transfer switch 4 through connecting wires 6. The intelligent change-over switch 4 can transmit electrochemical signals detected by each group of corrosion sheets to the data measurement module 8 for electrochemical noise test or self-detection by switching the switch contact 5 connected with the data measurement module 8.
The intelligent change-over switch 4 is provided with three gears, and the corresponding relation with the three groups of corrosion pieces a, b and c is as follows: the intelligent change-over switch 4 is adjusted to the first gear, and the data measurement module 8 is connected with a1-a3 corrosion plate for testing; the intelligent change-over switch 4 is adjusted to the second gear, and the data measurement module 8 is connected with the b1-b3 corrosion plate for testing; the intelligent change-over switch 4 is adjusted to the third gear, and the data measurement module 8 is connected with the c1-c3 corrosion piece for testing.
The data measuring module 8 is an electrochemical noise testing module, which is an execution unit for information processing and program operation, and executes the program after receiving the instruction, tests and stores the operation result. Specifically, the electrochemical noise test module is composed of a logic operation unit, a control unit and a storage unit, wherein the control unit is respectively connected with the logic operation unit and the storage unit, the logic operation unit is connected with the storage unit, the storage capacity of the storage unit is limited, and a large amount of data generated by long-term monitoring can be automatically copied into the data storage 16.
The data memory 16 is connected to the data measuring module 8 via a communication line 11. One end of the data memory 16 is provided with an aviation plug 17 for exporting data.
The power supply 12 is used to supply power to and between the data measurement module 8 and the data store 16. The power source 12 is connected with the data measuring module 8 through a connecting line 9 of the anode of the power source 12 and a connecting line 10 of the cathode of the power source 12, and the power source 12 is connected with the data storage 16 through a connecting line 14 of the anode of the power source 12 and a connecting line 15 of the cathode of the power source 12.
When the corrosion monitoring probe is used, firstly, the group c corrosion pieces are connected with the data measurement module 8 by the intelligent change-over switch 4, initial checking test is carried out, and then the connection is disconnected; and selecting one group from the group a of corrosion pieces and the group b of corrosion pieces to be connected with the data measuring module 8 according to the environmental condition and the monitoring duration to carry out corrosion test. After a period of corrosion test, the c groups of corrosion pieces can be connected with the data measurement module 8 again for data calibration, so that the test accuracy is improved, and the error is reduced.
Claims (10)
1. A multi-channel self-test electrochemical noise corrosion monitoring probe, comprising: the corrosion simulation module, the change-over switch and the data measurement module are connected in sequence;
the corrosion simulation module comprises a corrosion piece for simulating the corrosion state of the monitored object and a corrosion piece for calibration;
the change-over switch is used for controlling the data communication relation between the data measurement module and the corrosion piece;
the data measurement module is used for carrying out electrochemical noise test and self-inspection.
2. The corrosion monitoring probe of claim 1, wherein said data measurement module comprises an electrochemical noise test module; the electrochemical noise test module comprises a logic operation unit, a control unit and a storage unit, wherein the logic operation unit is used for receiving and calculating an electrochemical signal transmitted by the corrosion piece, the control unit is used for detecting signal control, and the storage unit is used for storing an operation result of the logic operation unit.
3. The corrosion monitoring probe according to claim 1, wherein the corrosion pieces for simulating the corrosion state of the monitoring object are two or more groups, and the thicknesses of the corrosion pieces in each group are different.
4. The corrosion monitoring probe of claim 1 further comprising a data storage device for storing data generated by said data measurement module.
5. The corrosion monitoring probe of claim 4, wherein said data storage device is connected to said data measurement module.
6. The corrosion monitoring probe of claim 4 further comprising a power supply for supplying power to said data measurement module and data storage.
7. The corrosion monitoring probe of claim 6, wherein said power source is located between said data measurement module and said data storage device, said power source being connected to said data measurement module and said data storage device, respectively.
8. The corrosion monitoring probe of claim 1 further comprising a housing for housing components of the corrosion monitoring probe other than corrosion pads.
9. The corrosion monitoring probe of claim 8, wherein the interior of said housing is filled with a temperature and pressure resistant non-metallic material.
10. The corrosion monitoring probe of claim 1, further comprising a corrosion plate protective cover disposed about a periphery of said simulated corrosion module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022117843.3U CN213600558U (en) | 2020-09-24 | 2020-09-24 | Multi-channel self-checking type electrochemical noise corrosion monitoring probe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022117843.3U CN213600558U (en) | 2020-09-24 | 2020-09-24 | Multi-channel self-checking type electrochemical noise corrosion monitoring probe |
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| CN213600558U true CN213600558U (en) | 2021-07-02 |
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