Geothermal well corrosion measurement system and method

Abstract

The invention provides a geothermal well corrosion measurement system and method, and belongs to the technical field of corrosion measurement. Comprising a well liquid level corrosion measuring mechanism which is arranged on a height adjusting mechanism, in the measuring process, part of the well liquid level corrosion measuring mechanism is located above the well liquid level, part of the well liquid level corrosion measuring mechanism is located below the well liquid level, and well liquid level corrosion data of the geothermal well is represented through weight variation; the underground corrosion measuring mechanism is arranged below the well liquid level of the geothermal well and is used for measuring in-well corrosion data of the geothermal well; the wellhead corrosion measuring mechanism is arranged on the geothermal well and used for measuring wellhead corrosion data of the geothermal well; and the processing device is used for receiving and storing the in-well corrosion data and the wellhead corrosion data, controlling the height adjusting mechanism to adjust the position height of the well liquid level corrosion measuring mechanism in the well according to an external control instruction, and generating and storing well liquid level corrosion data based on an external input signal. The system is simple in structure, and corrosion data of the geothermal well can be comprehensively and accurately measured.

Description

Technical Field

[0001] The present invention relates to the technical field of corrosion measurement, and in particular to a geothermal well corrosion measurement system and a geothermal well corrosion measurement method. Background Art

[0002] Geothermal energy is gaining more and more attention due to its unique advantages such as stability, high efficiency, pollution-free and cogeneration of heat and power. The scale of the geothermal energy industry is growing rapidly and geothermal energy is in a relatively rapid development period. However, the serious problem that is common in geothermal systems - the corrosion caused by the contact between the materials of the equipment in the geothermal system and the various corrosive components such as Cl-, O2, H2S contained in geothermal water has a very adverse impact on the normal operation and economy of the geothermal system. Statistics show that the parts of the pipes and sewage pipelines that are corroded and perforated include elbows, horizontal pipes, risers, welds, etc. The parts of the pipes are diversified and the distribution of the perforation points is very wide. After the scaling of the pipeline, the water output and heat transfer efficiency decrease, and the corrosion is aggravated. The annual loss of geothermal wells due to corrosion accounts for about 11%, and the thermal efficiency of the heat exchange pipe is reduced by 5% for every 1mm of scaling. At present, the anti-corrosion and anti-scaling measures have achieved certain results, but have not completely solved the problem, which has seriously affected the subsequent development of geothermal wells.

[0003] In the process of geothermal development, if it is a newly developed block and the new area is not familiar, it is necessary to conduct a pilot test first to test the corrosion data of the block to provide parameter basis for the subsequent large-scale development. Therefore, in the pilot test of geothermal wells, it is necessary to test and analyze the corrosion rate. At present, the main method used in the pilot test of geothermal wells is to collect geothermal water during the pumping test and analyze it indoors. At the same time, the test parameters on site are added for indoor circulation simulation to analyze the corrosiveness of the water samples. The disadvantage of this analysis method is that the parameters added in the indoor test are not the real parameters of the geothermal water on site. There is a deviation between the results of the indoor simulation and the actual results on site, resulting in inaccurate test results and unable to guide the subsequent large-scale development of geothermal. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a geothermal well corrosion measurement system and method to solve the problem that the parameters added during the indoor test are not the real parameters of the geothermal water on site, and there is a deviation between the results simulated indoors and the actual results on site, resulting in inaccurate test results and inability to guide subsequent large-scale geothermal development.

[0005] In order to achieve the above object, an embodiment of the present invention provides a geothermal well corrosion measurement system, the system comprising: A well liquid surface corrosion measuring mechanism is arranged on the height adjustment mechanism, and the height adjustment mechanism is used to adjust the position height of the well liquid surface corrosion measuring mechanism in the geothermal well, so that during the measurement process, the well liquid surface corrosion measuring mechanism is partially located above the well liquid surface and partially located below the well liquid surface, and the well liquid surface corrosion measuring mechanism is used to characterize the well liquid surface corrosion data of the geothermal well through the weight change; A downhole corrosion measuring mechanism is arranged below the well liquid level of the geothermal well and is located below the well liquid level corrosion measuring mechanism, and is used to measure the well corrosion data of the geothermal well; A wellhead corrosion measuring mechanism is arranged on the wellhead weir box of the geothermal well and is used to measure the wellhead corrosion data of the geothermal well; A processing device is connected to the downhole corrosion measuring mechanism, the wellhead corrosion measuring mechanism and the height adjustment mechanism, and the processing device is used to: receive and store the in-hole corrosion data and the wellhead corrosion data; and control the height adjustment mechanism to adjust the position height of the well liquid surface corrosion measuring mechanism in the well according to external control instructions; and generate and store the well liquid surface corrosion data based on an external input signal; wherein the external input signal is determined by the weight change.

[0006] Optionally, the well liquid surface corrosion measurement mechanism includes: A support column, wherein a plurality of corrosion hanging sheets are sequentially arranged at intervals from top to bottom on the outer wall of the support column.

[0007] Optionally, the height adjustment mechanism includes: A winding motor, the winding end of which is connected to the well liquid surface corrosion measuring mechanism via a retractable cable; or The height adjustment mechanism comprises: A water testing pipe string, on which the well liquid surface corrosion measuring mechanism is arranged; The lifting and lowering adjustment mechanism is connected to the water testing pipe string and is used to adjust the depth of the water testing pipe string entering the well.

[0008] Optionally, the downhole corrosion measurement mechanism includes: An outer shell body with a hollow interior, a measuring end of the outer shell body is provided with a probe measuring test piece and a probe compensating test piece through a sealing mechanism, a sealing plug is provided at the sealing end of the outer shell body, and a thermos bottle is provided inside the outer shell body; A power supply, arranged in the thermos bottle, connected to the probe measurement test strip and the probe compensation test strip, and used to supply power to the probe measurement test strip and the probe compensation test strip; A data acquisition mechanism is arranged in the thermos bottle, connected to the probe measurement test piece and the probe compensation test piece, and is used to collect corrosion data in the well; The protective cover has an internal accommodating space. The protective cover is arranged at the measuring end of the outer shell. The probe measuring test piece and the probe compensating test piece are located in the internal accommodating space of the protective cover.

[0009] Optionally, an accommodating groove is provided on the outer wall of the protective cover; The downhole corrosion measurement mechanism also includes: A plurality of corrosion hanging sheets are arranged in the accommodating groove of the protective cover through an isolation ring.

[0010] Optionally, the wellhead corrosion measurement mechanism includes: An inductive sensor head is used to collect the inductive electrical signal from the wellhead of the geothermal well; A collector is connected to the inductive sensor head through a data transfer mechanism, and the collector is used to obtain wellhead corrosion data of the geothermal well based on the induced electrical signal.

[0011] Optionally, the inductive sensor head comprises: A probe mounting rod, wherein the measuring end of the probe mounting rod is sealed with a measuring test piece tube with a hollow interior, the measuring end of the probe mounting rod is also provided with a reference resistor and a plurality of inductance probes, the plurality of inductance probes and the reference resistor are located in the measuring test piece tube, and the joint end of the probe mounting rod is provided with a first joint, the first joint is connected to the data transfer mechanism; A plurality of inductive probes and the reference resistor are connected to the first connector via a wire, and the inductive probes are used to collect induced electrical signals.

[0012] Optionally, the collector includes: A hollow accommodating shell, wherein a bottom plate is disposed at an open end of the accommodating shell so that a sealed accommodating cavity is formed inside the accommodating shell, and a data transmission socket is disposed on the bottom plate; The circuit board is arranged in the accommodating cavity of the accommodating shell and is connected to the data transfer mechanism through a data transmission socket, and is used to obtain the wellhead corrosion data of the geothermal well based on the induced electrical signal transmitted by the data transfer mechanism.

[0013] Optionally, the data transmission socket is provided with an external thread, and the data transfer mechanism includes: A supporting transmission rod with a hollow interior, wherein a first socket and a second socket are respectively disposed at two ends of the supporting transmission rod, wherein the first socket and the second socket are connected to each other through a wire, and an external thread is disposed on the outside of the first socket; A transfer plug, wherein the two ends of the transfer plug are rotatably provided with a first locking nut and a second locking nut, the first locking nut is connected to the data transmission socket, and the second locking nut is connected to the first socket supporting the transmission rod.

[0014] Optionally, a first connecting piece is provided on the first joint; A second connecting piece is provided on the second socket supporting the transmission rod; The first connecting piece and the second connecting piece are connected to each other by at least two bolts.

[0015] On the other hand, the present invention also provides a geothermal well corrosion measurement method, which is applied to the above-mentioned geothermal well corrosion measurement system, and the method comprises: Confirm that the geothermal well flushing is completed; Install the downhole corrosion measurement mechanism on the water pump of the water test pipe column, and lower the water pump to a preset depth position in the geothermal well; Obtaining the initial weight of the well liquid surface corrosion measuring mechanism, and adjusting the height of the well liquid surface corrosion measuring mechanism in the geothermal well by means of the height adjusting mechanism, so that during the measurement process, the well liquid surface corrosion measuring mechanism is partially located above the well liquid surface and partially located below the well liquid surface; The wellhead corrosion measuring mechanism is arranged on the wellhead weir box of the geothermal well; Start geothermal well corrosion measurement, and after a preset time, obtain the actual weight of the well liquid surface corrosion measuring mechanism, obtain the well liquid surface corrosion data based on the initial weight and actual weight of the well liquid surface corrosion measuring mechanism, and read the wellbore corrosion data of the downhole corrosion measuring mechanism and the wellhead corrosion data of the wellhead corrosion measuring mechanism.

[0016] Optionally, the height adjustment mechanism includes: a winding motor, the winding end of the winding motor is connected to the well liquid surface corrosion measuring mechanism through a retractable cable; or includes a water test pipe column and a lifting and lowering adjustment mechanism, and the well liquid surface corrosion measuring mechanism is arranged on the water test pipe column; The height of the well liquid surface corrosion measuring mechanism in the geothermal well is adjusted by the height adjustment mechanism, including: If the geothermal well is in an open state, the well liquid surface corrosion measuring mechanism is connected to the reeling end of the reeling motor through the reeling cable, and the position height of the well liquid surface corrosion measuring mechanism in the geothermal well is adjusted by retracting and extending the reeling motor; If the geothermal well is not opened, the well liquid surface corrosion measuring mechanism is set on the water test pipe column, and the lowering depth of the water test pipe column is adjusted by the lifting and lowering adjustment mechanism to adjust the position height of the well liquid surface corrosion measuring mechanism in the geothermal well.

[0017] This technical solution forms a geothermal well corrosion measurement system through a well liquid surface corrosion measurement mechanism, a downhole corrosion measurement mechanism and a wellhead corrosion measurement mechanism, thereby realizing the measurement of the well liquid surface corrosion data, the wellbore corrosion data and the wellhead corrosion data of the geothermal well. The system structure is simple and can realize comprehensive and accurate corrosion detection, thereby providing data basis for block development.

[0018] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a first geothermal well corrosion measurement system provided by the present invention; Figure 2 It is a structural schematic diagram of a second geothermal well corrosion measurement system provided by the present invention; Figure 3 It is a structural schematic diagram of the downhole corrosion measurement mechanism provided by the present invention; Figure 4 It is a structural schematic diagram of the wellhead corrosion measurement mechanism provided by the present invention; Figure 5 It is a structural schematic diagram of the inductive sensor head provided by the present invention; Figure 6 It is a structural schematic diagram of a collector provided by the present invention; Figure 7 It is a structural schematic diagram of the data transfer mechanism provided by the present invention; Figure 8 is a flow chart of a first geothermal well corrosion measurement method provided by the present invention; Fig. 9 It is a flow chart of the second geothermal well corrosion measurement method provided by the present invention.

[0020] Description of Reference Numerals 1- Well liquid surface corrosion measurement mechanism; 2- Height adjustment mechanism; 3- Downhole corrosion measurement mechanism; 4-wellhead corrosion measurement mechanism; 5-processing device; 11-support column; 12-corrosion hanging piece; 21-reeling motor; 22-water test column; 23-lifting and lowering adjustment mechanism; 31-outer shell; 32-sealing mechanism; 33-probe measurement test piece; 34-probe compensation test piece; 35-sealing plug; 36-power supply; 37-data acquisition mechanism; 38-protective cover; 41- inductive sensor head; 42- collector; 43- data transfer mechanism; 61-first connecting piece; 62-second connecting piece; 63-bolt; 311-thermospheric bottle; 381-accommodating groove; 411-probe mounting rod; 412-measuring test piece tube; 413-inductance probe; 414-reference resistor; 415 - first joint; 421 - housing; 422 - bottom plate; 423-data transmission socket; 424-circuit board; 431-transfer plug; 432-support transmission rod; 433-first socket; 434-first locking nut; 435 - second locking nut; 436 - second socket. DETAILED DESCRIPTION

[0021] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0022] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, left, right" generally refer to the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the inventive product is usually placed when in use.

[0023] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0024] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0025] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In addition, the terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute precision, but can have certain deviations. For example, "roughly equal" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Figure 1 It is a structural schematic diagram of a first geothermal well corrosion measurement system provided by the present invention; Figure 2 It is a structural schematic diagram of a second geothermal well corrosion measurement system provided by the present invention; Figure 3 It is a structural schematic diagram of the downhole corrosion measurement mechanism provided by the present invention; Figure 4 It is a structural schematic diagram of the wellhead corrosion measurement mechanism provided by the present invention; Figure 5 It is a structural schematic diagram of the inductive sensor head provided by the present invention; Figure 6 It is a structural schematic diagram of a collector provided by the present invention; Figure 7 It is a structural schematic diagram of the data transfer mechanism provided by the present invention; Figure 8 is a flow chart of a first geothermal well corrosion measurement method provided by the present invention; Fig. 9 It is a flow chart of the second geothermal well corrosion measurement method provided by the present invention.

[0029] like Figure 1-2 As shown, this embodiment provides a geothermal well corrosion measurement system, the system comprising: A well liquid surface corrosion measuring mechanism 1 is arranged on a height adjustment mechanism 2, and the height adjustment mechanism 2 is used to adjust the position height of the well liquid surface corrosion measuring mechanism 1 in the geothermal well, so that during the measurement process, the well liquid surface corrosion measuring mechanism 1 is partially located above the well liquid surface and partially located below the well liquid surface. The well liquid surface corrosion measuring mechanism 1 is used to characterize the well liquid surface corrosion data of the geothermal well through the weight change; A downhole corrosion measuring mechanism 3 is arranged below the well liquid level of the geothermal well and below the well liquid level corrosion measuring mechanism 1, and is used to measure the well corrosion data of the geothermal well; A wellhead corrosion measuring mechanism 4 is arranged on the wellhead weir box of the geothermal well and is used to measure the wellhead corrosion data of the geothermal well; The processing device 5 is connected to the downhole corrosion measuring mechanism 3, the wellhead corrosion measuring mechanism 4 and the height adjustment mechanism 2, and the processing device 5 is used to: receive and store the in-well corrosion data and the wellhead corrosion data; and control the height adjustment mechanism 2 to adjust the position height of the well liquid surface corrosion measuring mechanism 1 in the well according to the external control instruction; and generate and store the well liquid surface corrosion data based on the external input signal; wherein the external input signal is determined by the weight change.

[0030] Specifically, in this embodiment, a geothermal well corrosion measurement system is formed by setting a well liquid surface corrosion measurement mechanism 1 at the well liquid surface, setting a downhole corrosion measurement mechanism 3 at a preset depth of the well, and setting a wellhead corrosion measurement mechanism 4 at the wellhead, thereby realizing the measurement of well liquid surface corrosion data, well corrosion data, and wellhead corrosion data of the geothermal well. The system structure is simple and can realize comprehensive and accurate corrosion detection, thereby providing data basis for block development. Specifically, the wellhead corrosion measurement mechanism 4 is set on the wellhead weir box of the geothermal well and is connected to the pipeline, thereby realizing corrosion detection of the fluid (liquid, gas) transported in the pipeline. In addition, a processing device 5 is provided, which is connected to the downhole corrosion measuring mechanism 3, the wellhead corrosion measuring mechanism 4 and the height adjustment mechanism 2, so as to realize reading and storing the wellbore corrosion data from the downhole corrosion measuring mechanism 3, and realizing reading and storing the wellhead corrosion data from the wellhead corrosion measuring mechanism 4; in addition, when it is necessary to adjust the height of the well liquid surface corrosion measuring mechanism 1, the height adjustment mechanism 2 is controlled according to the received external control instruction to adjust the position of the well liquid surface corrosion measuring mechanism 1. After the measurement is completed, the operator obtains the weight change of the well liquid surface corrosion measuring mechanism 1, and inputs the external input signal containing the weight change into the processing device 5. The processing device 5 generates and stores the well liquid surface corrosion data based on the external input signal. Inputting the external control instruction and the external input signal to the processing device 5 can be realized by a remote control, a button, a touch screen, etc.

[0031] Furthermore, if Figure 1-2 As shown, the well liquid surface corrosion measurement mechanism 1 includes: A support column 11, on the outer wall of which a plurality of corrosion hanging sheets 12 are sequentially arranged from top to bottom.

[0032] In this embodiment, a plurality of corrosion hanging plates 12 are arranged on the outer wall of the support column 11 in sequence from top to bottom, and during the measurement process, part of the corrosion hanging plates 12 on the support column 11 are located above the well liquid level and part of them are located below the well liquid level to achieve a comparison of corrosion rates.

[0033] Specifically, if five corrosion hangers 12 are set on the outer wall of the support column 11, and the corrosion hangers 12 are spaced 30 mm apart, during the actual measurement process, the top two corrosion hangers 12 are adjusted to be above the well liquid level, and the bottom two corrosion hangers 12 are adjusted to be below the well liquid level, and the corrosion hanger 12 in the middle position is at the junction of the well liquid level.

[0034] Furthermore, if Figure 1-2 As shown, the height adjustment mechanism 2 includes: A winding motor 21, wherein the winding end of the winding motor 21 is connected to the well liquid surface corrosion measuring mechanism 1 via a retractable cable; or The height adjustment mechanism 2 comprises: A water testing pipe string 22, on which the well liquid surface corrosion measuring mechanism 1 is arranged; The lifting and lowering adjustment mechanism 23 is connected to the water testing pipe string 22 and is used to adjust the depth of the water testing pipe string 22 entering the well.

[0035] Specifically, in this embodiment, the height adjustment mechanism 2 is set to include two different implementation methods, which have been selected in actual use to improve the convenience of use and the scope of application. For example, when the wellhead of the geothermal well is in an open state, the winding motor 21 is used to connect the well liquid surface corrosion measuring mechanism 1 through the retractable cable to achieve the adjustment of the well liquid surface corrosion measuring mechanism 1; when the wellhead of the geothermal well is not in an open state, the well liquid surface corrosion measuring mechanism 1 is set on the water test column 22, and the depth of the water test column 22 is adjusted by the lifting and adjusting mechanism 23, so that the well liquid surface corrosion measuring mechanism 1 is adjusted along with the water test column 22. More specifically, the water test column 22 is set to include: an anti-corrosion hard pipe and an anti-corrosion hose, and the anti-corrosion hard pipe is placed in the well, the top of the anti-corrosion hard pipe is located above the wellhead of the geothermal well, and the anti-corrosion hose is connected; the water test column 22 is made of anti-corrosion material, which can ensure the service life; in addition, the lifting and adjusting mechanism 23 can be set as a hydraulic lifting mechanism, etc., connected to the anti-corrosion hard pipe to achieve the height adjustment of the anti-corrosion hard pipe.

[0036] Furthermore, if Figure 3 As shown, the downhole corrosion measurement mechanism 3 includes: An outer shell 31 is hollow inside, a measuring end of the outer shell 31 is provided with a probe measuring test piece 33 and a probe compensating test piece 34 through a sealing mechanism 32, a sealing plug 35 is provided at the sealing end of the outer shell 31, and a thermos bottle 311 is provided inside the outer shell 31; A power supply 36 is disposed in the thermos bottle 311 and connected to the probe measurement test strip 33 and the probe compensation test strip 34 to supply power to the probe measurement test strip 33 and the probe compensation test strip 34; A data acquisition mechanism 37 is disposed in the thermos bottle 311 and connected to the probe measurement test piece 33 and the probe compensation test piece 34 to collect corrosion data in the well; The protective cover 38 has an internal accommodating space. The protective cover 38 is disposed at the measuring end of the outer shell 31 . The probe measuring test piece 33 and the probe compensating test piece 34 are located in the internal accommodating space of the protective cover 38 .

[0037] Specifically, since the pressure in the geothermal well is relatively high, the outer shell 31 is provided with a certain structural strength and can bear a certain pressure, thereby protecting the various components inside. In addition, since the temperature of the geothermal well is relatively high, the various components will be damaged if they operate in a high temperature environment for a long time, and the measurement results will be affected. Therefore, a thermos bottle 311 is provided inside the outer shell 31 to ensure that the internal temperature is stable at a low value (on this basis, an insulating layer can also be applied on the inner wall of the outer shell 31 to achieve temperature isolation); the measuring end of the outer shell 31 is provided with a probe measurement test piece 33 and a probe compensation test piece 34 through a sealing mechanism 32, which is in contact with the geothermal water and receives the corrosion changes of the geothermal water. The corrosion in the well can be measured through the probe measurement test piece 33 The probe compensation test piece 34 compensates the measured data according to the change amount, thereby improving the accuracy of the result; in addition, a power supply 36 and a data acquisition mechanism 37 are arranged in the thermos flask 311, and the power supply 36 and the data acquisition mechanism 37 are connected by wires, and are also connected to the probe measurement test piece 33 and the probe compensation test piece 34 by high-temperature resistant wires to realize signal transmission; the probe measurement test piece 33 and the probe compensation test piece 34 are arranged in the accommodation space formed between the protective cover 38 and the outer shell 31, which can realize the protection of the probe measurement test piece 33 and the probe compensation test piece 34, and avoid the probe measurement test piece 33 and the probe compensation test piece 34 from being scratched and affecting the measurement result, and at the same time, it will not affect the measurement result of the probe measurement test piece 33 and the probe compensation test piece 34. The sealing plug 35 can be sealed and disassembled by threaded connection.

[0038] More specifically, a high-temperature resistant O-type fluororubber seal is arranged between the sealing mechanism 32 and the outer shell 31 to achieve sealing, thereby ensuring that the high-temperature geothermal water underground does not enter the interior of the instrument and protecting the circuit parts inside; in addition, a corresponding connection structure (clamping structure) is arranged in the thermos bottle 311 to fix the power supply 36 and the data acquisition mechanism 37. The data acquisition mechanism 37 can be set as a chip, a single-chip microcomputer or a circuit board, etc.

[0039] More specifically, a wireless communication module can be provided in the thermos flask 311, and the wireless communication module is connected to the data acquisition mechanism 37 and the processing device 5, so as to realize the real-time transmission of the measurement data. In addition, a memory can also be provided in the thermos flask 311 to realize the storage of the measurement data.

[0040] Furthermore, if Figure 3 As shown, a receiving groove 381 is provided on the outer wall of the protective cover 38; The downhole corrosion measurement mechanism 3 also includes: A plurality of corrosion hanging sheets 12 are arranged in the receiving groove 381 of the protection cover 38 via an isolation ring.

[0041] Specifically, since underground electronic instruments may fail accidentally, in order to prevent the probe measurement test piece 33 and the probe compensation test piece 34 from not working, resulting in measurement failure, a receiving groove 381 is provided on the outer wall of the protective cover 38, and multiple corrosion hanging pieces 12 are arranged in the receiving groove 381 of the protective cover 38 using an isolation ring, so as to realize reliable backup for underground corrosion measurement and ensure accurate measurement of underground corrosion. The corrosion hanging piece 12 adopts a double-hole strip corrosion hanging piece, which is fixed to the front section of the instrument with an isolation ring. At the same time, this part of the corrosion hanging piece is also used as a control group to compare the corrosion rate with the corrosion rate measured by the instrument, so as to more accurately verify the accuracy of the corrosion test. At the same time, the hanging piece can more easily determine whether there is corrosion perforation in the geothermal water.

[0042] Furthermore, if Figure 4 As shown, the wellhead corrosion measurement mechanism 4 includes: An inductive sensor head 41 is used to collect an inductive electrical signal from a wellhead of a geothermal well; The collector 42 is connected to the inductive sensor head 41 via a data transfer mechanism 43. The collector 42 is used to obtain the wellhead corrosion data of the geothermal well based on the induced electrical signal.

[0043] Specifically, in this embodiment, in order to measure the fluid corrosion above the wellhead of the geothermal well, a wellhead corrosion measuring mechanism 4 is arranged on the wellhead weir box, and the inductive sensor head 41 of the wellhead corrosion measuring mechanism 4 is extended into the conveying pipeline to contact the fluid, thereby collecting the induced electrical signal, and the collected induced electrical signal is transmitted to the collector 42 through the data transfer mechanism 43, so as to analyze and obtain the wellhead corrosion data of the geothermal well; wherein the data transfer mechanism 43 not only plays the role of data transmission to avoid the influence of electromagnetic signals from the external environment, but also has a certain structural strength to play a supporting and protective role.

[0044] Furthermore, if Figure 5 As shown, the inductive sensor head 41 includes: A probe mounting rod 411, wherein the measuring end of the probe mounting rod 411 is sealed with a measuring test piece tube 412 having a hollow interior, and the measuring end of the probe mounting rod 411 is also provided with a reference resistor 414 and a plurality of inductance probes 413, wherein the plurality of inductance probes 413 and the reference resistor 414 are located in the measuring test piece tube 412, and a first connector 415 is provided at the connector end of the probe mounting rod 411, wherein the first connector 415 is connected to the data transfer mechanism 43; A plurality of inductance probes 413 and the reference resistor 414 are connected to the first connector 415 via wires, and the inductance probes 413 are used to collect induced electrical signals.

[0045] Specifically, in this embodiment, the interior of the probe mounting rod 411 is hollow and is provided with a high temperature resistant wire. The measuring end of the probe mounting rod 411 is provided with a measuring test piece tube 412 with a hollow interior, and is connected in a sealed manner (such as by a thread + rubber sealing ring, so as to achieve detachable replacement). The measuring end of the probe mounting rod 411 is provided with a plurality of inductance probes 413 and a reference resistor 414, and is located in the internal accommodation space of the measuring test piece tube 412. The measuring test piece tube 412 can not only protect the plurality of inductance probes 413 and the reference resistor 414 inside, but also be corroded during the movement of the fluid, so that its thickness changes, and then the induced electrical signal generated by the inductance probe 413 changes. Among them, the thinner the thickness of the measuring test piece tube 412, the larger the induced electrical signal generated by the inductance probe 413. The function of the reference resistor 414 is to filter out interference factors such as temperature and pressure to ensure the accuracy of the corrosion test.

[0046] More specifically, the inductance probe 413 is an inductance probe measurement test piece, and its main function is to provide a test piece that is consistent with the measured pipe column, through which the corrosion rate can be measured instead of the measured pipe column. The principle adopted is that twelve high-temperature wires have their own coils to realize the electromagnetic induction principle. This method is different from the conventional tool that uses one coil to realize electromagnetic induction. The electromagnetic induction of twelve high-temperature wires has its own coils, which significantly increases the speed and accuracy of electromagnetic induction, improves the anti-interference ability and the accuracy of instrument testing. A ceramic tube is set between the first joint 415 and the wire. Its main functions are high temperature resistance, corrosion resistance, and pressure resistance. It is a transition component connecting the high-temperature resistant wire and the first joint 415 (using a twelve-core aviation plug), which can isolate the high temperature and high pressure inside the inductive probe from the outside and will not enter the inductance probe rod, ensuring that the instrument is resistant to high temperature and high pressure.

[0047] Furthermore, if Figure 6 As shown, the collector 42 includes: A hollow accommodating shell 421, an open end of which is provided with a bottom plate 422, so that a sealed accommodating cavity is formed in the accommodating shell 421, and a data transmission socket 423 is provided on the bottom plate 422; The circuit board 424 is disposed in the accommodating cavity of the accommodating shell 421 and is connected to the data transfer mechanism 43 via a data transmission socket 423 , and is used to obtain the wellhead corrosion data of the geothermal well based on the induced electrical signal transmitted by the data transfer mechanism 43 .

[0048] Specifically, in this embodiment, the collector 42 includes: a accommodating shell 421 and a base plate 422 that are connected to each other. A sealing strip is provided on the contact surface of the accommodating shell 421 and the base plate 422, and is fixed by screws or the like, so that an internally sealed structure is formed inside, which not only protects the internal structure, but also enables quick disassembly and convenient maintenance; in addition, a data transmission socket 423 is provided on the base plate 422 to realize the transmission of induced electrical signals and the transmission of electrical energy; a circuit board 424 is fixed on the base plate 422 and is located inside the accommodating shell 421, and is used to receive the induced electrical signals from the data transfer mechanism 43, and based on the change in the induced electrical signals, the wellhead corrosion rate can be determined as wellhead corrosion data.

[0049] More specifically, a wireless communication module may be provided on the circuit board 424, and the wireless communication module is connected to the circuit board 424 and the processing device 5, so as to realize real-time transmission of measurement data. In addition, a memory may be provided on the circuit board 424 to realize storage of measurement data.

[0050] Furthermore, a data processing chip is provided on the circuit board 424. In the process of processing the induced electrical signal by the data processing chip, in order to ensure the accuracy of the data, the error itself needs to be corrected: that is, a series of measuring test pieces with different ranges (outer diameter 8.0mm~9.5mm) are manufactured by high-precision processing technology, and the accuracy is higher than 1%; these measuring test pieces are processed into analog probes, and the actual resistance values ​​of the analog probes are measured by high-precision instruments respectively, and the actual resistance values ​​and the theoretical thinning depths of the analog probes are summarized and analyzed, and a mathematical model is studied and formulated:

[0051] in, is the measured resistivity; L is the length; L is the outer diameter; L is the inner diameter; is the measured thickness; To compensate for resistivity; is the fitting coefficient;

[0052] in, is the theoretical thickness; The actual measured thickness.

[0053] Furthermore, if Figure 7 As shown, the data transmission socket 423 is provided with an external thread, and the data transfer mechanism 43 includes: A support transmission rod 432 with a hollow interior, wherein a first socket 433 and a second socket 436 are respectively disposed at two ends of the support transmission rod 432, wherein the first socket 433 and the second socket 436 are interconnected through a wire, and an external thread is disposed on the outside of the first socket 433; The transfer plug 431 has a first locking nut 434 and a second locking nut 435 rotatably disposed at both ends thereof, wherein the first locking nut 434 is connected to the data transmission socket 423 , and the second locking nut 435 is connected to the first socket 433 supporting the transmission rod 432 .

[0054] Specifically, in this embodiment, by providing a transfer plug 431 and a support transmission rod 432, data transmission is achieved and installation, disassembly and carrying are convenient. In addition, in order to ensure the stability of data transmission and reduce interference from external signals, the support transmission rod 432 is made of metal, and a first locking nut 434 and a second locking nut 435 are rotatably provided at the two ends of the transfer plug 431. At the same time, external threads are provided on the data transmission socket 423 connected to the two ends of the transfer plug 431 and the first socket 433 of the support transmission rod 432. When the plugs at both ends of the transfer plug 431 are respectively inserted into the data transmission socket 423 and the first socket 433 of the support transmission rod 432, the first locking nut 434 is rotated so that the first locking nut 434 is tightly connected to the data transmission socket 423 through threads, and the second locking nut 435 is tightly connected to the first socket 433 through threads, thereby ensuring the stability of the connection structure, achieving stable data transmission, and improving the service life of the plug-in part.

[0055] More specifically, in order to ensure the service life of the plug and the socket, an aviation plug and an aviation socket may be used.

[0056] Furthermore, if Figure 7 As shown, the first connector 415 is provided with a first connecting piece 61; The second socket 436 supporting the transmission rod 432 is provided with a second connecting piece 62; The first connecting piece 61 and the second connecting piece 62 are connected to each other by at least two bolts 63 .

[0057] Specifically, in this embodiment, a first connecting piece 61 is provided on the first joint 415, and a second connecting piece 62 is provided on the second socket 436 supporting the transmission rod 432, and the first connecting piece 61 and the second connecting piece 62 are connected to each other by at least two bolts 63, which can ensure the stability of the connection structure, realize stable data transmission, and improve the service life of the plug-in part. Preferably, the number of bolts 63 is set to four, which are distributed in a square structure to ensure the stability of the connection part.

[0058] This embodiment also provides a geothermal well corrosion measurement method, which is applied to the above-mentioned geothermal well corrosion measurement system. Figure 8-9 As shown, the method includes: Confirm that the geothermal well flushing is completed; Install the downhole corrosion measurement mechanism on the water pump of the water test pipe column, and lower the water pump to a preset depth position in the geothermal well; Obtaining the initial weight of the well liquid surface corrosion measuring mechanism, and adjusting the height of the well liquid surface corrosion measuring mechanism in the geothermal well by means of the height adjusting mechanism, so that during the measurement process, the well liquid surface corrosion measuring mechanism is partially located above the well liquid surface and partially located below the well liquid surface; The wellhead corrosion measuring mechanism is arranged on the wellhead weir box of the geothermal well; Start geothermal well corrosion measurement, and after a preset time, obtain the actual weight of the well liquid surface corrosion measuring mechanism, obtain the well liquid surface corrosion data based on the initial weight and actual weight of the well liquid surface corrosion measuring mechanism, and read the wellbore corrosion data of the downhole corrosion measuring mechanism and the wellhead corrosion data of the wellhead corrosion measuring mechanism.

[0059] Further, the height adjustment mechanism includes: a winding motor, the winding end of the winding motor is connected to the well liquid surface corrosion measuring mechanism through a retractable cable; or includes a water test pipe column and a lifting and lowering adjustment mechanism, and the well liquid surface corrosion measuring mechanism is arranged on the water test pipe column; According to the different states of the wellhead of the geothermal well, different height adjustment mechanisms are used for height adjustment. Therefore, the height of the well liquid surface corrosion measurement mechanism in the geothermal well is adjusted by the height adjustment mechanism, including: If the geothermal well is in an open state, the well liquid surface corrosion measuring mechanism is connected to the reeling end of the reeling motor through the reeling cable, and the position height of the well liquid surface corrosion measuring mechanism in the geothermal well is adjusted by retracting and extending the reeling motor; If the geothermal well is not opened, the well liquid surface corrosion measuring mechanism is set on the water test pipe column, and the lowering depth of the water test pipe column is adjusted by the lifting and lowering adjustment mechanism to adjust the position height of the well liquid surface corrosion measuring mechanism in the geothermal well.

[0060] In a specific embodiment, the downhole corrosion measuring mechanism is installed below the pump at the lowest end of the water test string to test the downhole corrosion rate. The wellhead corrosion measuring mechanism is installed on the wellhead weir box to test the corrosion rate of the ground pipe. The well liquid surface corrosion measuring mechanism is installed on the coupling of the water test string, or a retractable cable is lowered into a position near the dynamic liquid surface. After completing the water test task, the corrosion monitoring instrument is removed to read the wellhead and downhole corrosion rates. At the same time, the corrosion rate is calculated based on the corrosion hanging piece weighing results, and compared and analyzed with the data of the test instrument to finally determine the corrosion rate of the geothermal well.

[0061] During the development of a geothermal area in Kaifeng, it is impossible to predict the corrosion situation of the area in advance, so an accurate corrosion rate test is required. The specific implementation example of the corrosion rate test of the geothermal well is as follows: 1) Installation of downhole corrosion measurement mechanism: Due to the small borehole in a certain geothermal area in Kaifeng, conventional geothermal corrosion monitoring tools cannot be used. It is necessary to install downhole corrosion monitoring instruments under the water pump. Since the pump is an old pump, it is impossible to weld a threaded short section, so it is directly welded under the pump for lowering.

[0062] 2) Lower the test pipe string: After installing the downhole corrosion monitoring instrument, lower the pipe string to the appropriate position.

[0063] 3) Well liquid surface corrosion measurement mechanism (liquid surface hanging piece lowering): Since the well adopts an open wellhead, it is relatively easy to lower the hanging piece. Therefore, the corrosion hanging piece is bundled on the measuring rope and lowered. Five groups of hanging pieces are adopted in the upper and lower parts, with an interval of 30mm. The third position is near the dynamic liquid surface, the first and second are above the dynamic liquid surface, and the fourth and fifth are below the dynamic liquid surface.

[0064] 4) Connect the wellhead water pumping pipeline: After the downhole tubing is lowered, the wellhead water test pipeline needs to be connected. The outlet of the wellhead water test pipeline is at the weir box.

[0065] 5) Install the wellhead corrosion measurement mechanism: Install the wellhead corrosion measurement mechanism at the weir box position. The instrument probe material is the material of the ground manifold, which is used to simulate the corrosion rate of the ground manifold.

[0066] 6) Pumping test: After all tools are installed, start the pumping test.

[0067] 7) Reading data: After the pumping test is completed, the instrument is taken out to read the corrosion data of the test and calculate the corrosion rate at the same time.

[0068] Through the above scheme, the present invention can achieve the following technical effects: (1) By designing a new geothermal water testing method, using downhole corrosion measurement devices, well liquid surface corrosion measurement devices, and wellhead corrosion measurement devices, different forms of corrosion monitoring are used at three different locations to accurately test the corrosion rate of geothermal water, providing accurate data basis for subsequent block development, and solving the technical problem of being unable to accurately test the corrosion rate of formation water during the current geothermal well pilot test; (2) By designing a small-sized corrosion monitoring instrument, the problem that the corrosion monitoring instrument is difficult to be lowered into a small wellbore and cannot monitor the corrosion rate of the small wellbore is solved. The problem that the current downhole corrosion monitoring instrument can only be used in large annular wellbores and there is not enough space to lower it into a small wellbore is solved. By designing a water pump-driven downhole corrosion measurement mechanism, sufficient space can be provided for the downhole corrosion monitoring instrument to ensure that corrosion data can be tested in the small wellbore. (3) By designing a wellhead corrosion measurement mechanism, the problem that geothermal water corrosion can only test the corrosion of water quality but cannot test the corrosion rate of ground pipes after well construction can be solved. By designing a wellhead corrosion monitoring instrument, the corrosion rate of ground pipes after the geothermal well is built can be accurately tested on site, providing accurate parameters for geothermal well development.

[0069] (4) By designing two types of corrosion monitoring well liquid surface corrosion measurement mechanisms (downhole hanging plate installation methods), the problem that the corrosion rate of the dynamic liquid surface position cannot be simulated during the corrosion rate testing of geothermal wells is solved. By installing corrosion hanging plates between the dynamic liquid surface and the static liquid surface, the corrosion rate of the dynamic liquid surface can be accurately tested.

[0070] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0071] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a single-chip microcomputer, a chip or a processor (processor) perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0072] The optional embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the technical concept of the embodiments of the present invention, the technical scheme of the embodiments of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner when there is no contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations. In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims

1. A geothermal well corrosion measurement system, characterized in that: The system comprises: A well liquid surface corrosion measuring mechanism (1) is arranged on a height adjustment mechanism (2), the height adjustment mechanism (2) being used to adjust the height of the well liquid surface corrosion measuring mechanism (1) in the geothermal well, so that during the measurement process, the well liquid surface corrosion measuring mechanism (1) is partially located above the well liquid surface and partially located below the well liquid surface, the well liquid surface corrosion measuring mechanism (1) being used to characterize well liquid surface corrosion data of the geothermal well through a weight change; A downhole corrosion measuring mechanism (3) is arranged below the well fluid level of the geothermal well and below the well fluid level corrosion measuring mechanism (1), and is used to measure the well corrosion data of the geothermal well; A wellhead corrosion measuring mechanism (4) is arranged on the wellhead weir box of the geothermal well and is used to measure the wellhead corrosion data of the geothermal well; A processing device (5) is connected to the downhole corrosion measuring mechanism (3), the wellhead corrosion measuring mechanism (4) and the height adjustment mechanism (2), and is used to: receive and store the wellbore corrosion data and the wellhead corrosion data; control the height adjustment mechanism (2) to adjust the position height of the wellbore liquid surface corrosion measuring mechanism (1) in the well according to an external control instruction; and generate and store the wellbore liquid surface corrosion data based on an external input signal; wherein the external input signal is determined by the weight change amount.

2. The geothermal well corrosion measurement system according to claim 1, characterized in that: The well liquid surface corrosion measuring mechanism (1) comprises: A support column (11), wherein a plurality of corrosion hanging sheets (12) are sequentially arranged at intervals from top to bottom on the outer wall of the support column (11).

3. The geothermal well corrosion measurement system according to claim 1, characterized in that: The height adjustment mechanism (2) comprises: A winding motor (21), wherein the winding end of the winding motor (21) is connected to the well liquid surface corrosion measuring mechanism (1) via a winding and releasing cable; or The height adjustment mechanism (2) comprises: A water testing pipe string (22), wherein the well liquid surface corrosion measuring mechanism (1) is arranged on the water testing pipe string (22). The lifting and lowering adjustment mechanism (23) is connected to the water testing pipe string (22) and is used to adjust the depth of the water testing pipe string (22) entering the well.

4. The geothermal well corrosion measurement system according to claim 1, characterized in that: The downhole corrosion measurement mechanism (3) comprises: An outer shell (31) having a hollow interior, a measuring end of the outer shell (31) being provided with a probe measuring test piece (33) and a probe compensating test piece (34) via a sealing mechanism (32), a sealing plug (35) being provided at the sealing end of the outer shell (31), and a thermos bottle (311) being provided inside the outer shell (31); a power supply (36), arranged in the thermos bottle (311), connected to the probe measurement test strip (33) and the probe compensation test strip (34), and used to supply power to the probe measurement test strip (33) and the probe compensation test strip (34); A data collection mechanism (37) is disposed in the thermos bottle (311), connected to the probe measurement test piece (33) and the probe compensation test piece (34), and is used to collect corrosion data in the well; A protective cover (38) has an internal accommodating space. The protective cover (38) is arranged at the measuring end of the outer shell (31). The probe measuring test piece (33) and the probe compensating test piece (34) are located in the internal accommodating space of the protective cover (38).

5. The geothermal well corrosion measurement system according to claim 4, characterized in that: An accommodating groove (381) is provided on the outer wall of the protective cover (38); The downhole corrosion measurement mechanism (3) further comprises: A plurality of corrosion hanging sheets (12) are arranged in the receiving groove (381) of the protective cover (38) via an isolation ring.

6. The geothermal well corrosion measurement system according to claim 1, characterized in that: The wellhead corrosion measurement mechanism (4) comprises: An inductive sensor head (41) for collecting an inductive electrical signal from a wellhead of a geothermal well; A collector (42) is connected to the inductive sensor head (41) via a data transfer mechanism (43), and the collector (42) is used to obtain wellhead corrosion data of the geothermal well based on the induced electrical signal.

7. The geothermal well corrosion measurement system according to claim 6, characterized in that: The inductive sensor head (41) comprises: A probe mounting rod (411), wherein the measuring end of the probe mounting rod (411) is sealed with an internally hollow measuring specimen tube (412), and the measuring end of the probe mounting rod (411) is also provided with a reference resistor (414) and a plurality of inductance probes (413), wherein the plurality of inductance probes (413) and the reference resistor (414) are located inside the measuring specimen tube (412), and a first connector (415) is provided at the connector end of the probe mounting rod (411), wherein the first connector (415) is connected to the data transfer mechanism (43); A plurality of inductance probes (413) and the reference resistor (414) are connected to the first connector (415) via a wire, and the inductance probes (413) are used to collect induced electrical signals.

8. The geothermal well corrosion measurement system according to claim 7, characterized in that: The collector (42) comprises: An internally hollow accommodating shell (421), wherein a bottom plate (422) is provided at an open end of the accommodating shell (421), so that a sealed accommodating cavity is formed inside the accommodating shell (421), and a data transmission socket (423) is provided on the bottom plate (422); A circuit board (424) is arranged in the accommodating cavity of the accommodating shell (421), connected to the data transfer mechanism (43) via a data transmission socket (423), and is used to obtain wellhead corrosion data of the geothermal well based on the induced electrical signal transmitted by the data transfer mechanism (43).

9. The geothermal well corrosion measurement system according to claim 8, characterized in that: The data transmission socket (423) is provided with an external thread, and the data transfer mechanism (43) comprises: A supporting transmission rod (432) having a hollow interior, wherein a first socket (433) and a second socket (436) are respectively disposed at two ends of the supporting transmission rod (432), wherein the first socket (433) and the second socket (436) are connected to each other via a wire, and an external thread is disposed on the outside of the first socket (433); A transfer plug (431), wherein the two ends of the transfer plug (431) are rotatably provided with a first locking nut (434) and a second locking nut (435), the first locking nut (434) is connected to the data transmission socket (423), and the second locking nut (435) is connected to the first socket (433) supporting the transmission rod (432).

10. The geothermal well corrosion measurement system according to claim 9, characterized in that: The first joint (415) is provided with a first connecting piece (61); A second connecting piece (62) is provided on the second socket (436) of the supporting transmission rod (432); The first connecting piece (61) and the second connecting piece (62) are connected to each other via at least two bolts (63).

11. A geothermal well corrosion measurement method, applied to the geothermal well corrosion measurement system according to any one of claims 1 to 10, characterized in that: The method comprises: Confirm that the geothermal well flushing is completed; Install the downhole corrosion measurement mechanism on the water pump of the water test pipe column, and lower the water pump to a preset depth position in the geothermal well; Obtaining the initial weight of the well liquid surface corrosion measuring mechanism, and adjusting the height of the well liquid surface corrosion measuring mechanism in the geothermal well by means of the height adjusting mechanism, so that during the measurement process, the well liquid surface corrosion measuring mechanism is partially located above the well liquid surface and partially located below the well liquid surface; The wellhead corrosion measuring mechanism is arranged on the wellhead weir box of the geothermal well; Start geothermal well corrosion measurement, and after a preset time, obtain the actual weight of the well liquid surface corrosion measuring mechanism, obtain the well liquid surface corrosion data based on the initial weight and actual weight of the well liquid surface corrosion measuring mechanism, and read the wellbore corrosion data of the downhole corrosion measuring mechanism and the wellhead corrosion data of the wellhead corrosion measuring mechanism.

12. The geothermal well corrosion measurement method according to claim 11, characterized in that: The height adjustment mechanism includes: a winding motor, the winding end of which is connected to the well liquid surface corrosion measuring mechanism through a retractable cable; or includes a water testing pipe column and a lifting and lowering adjustment mechanism, and the well liquid surface corrosion measuring mechanism is arranged on the water testing pipe column; The height of the well liquid surface corrosion measuring mechanism in the geothermal well is adjusted by the height adjustment mechanism, including: If the geothermal well is in an open state, the well liquid surface corrosion measuring mechanism is connected to the reeling end of the reeling motor through the reeling cable, and the position height of the well liquid surface corrosion measuring mechanism in the geothermal well is adjusted by retracting and extending the reeling motor; If the geothermal well is not opened, the well liquid surface corrosion measuring mechanism is set on the water test pipe column, and the lowering depth of the water test pipe column is adjusted by the lifting and lowering adjustment mechanism to adjust the position height of the well liquid surface corrosion measuring mechanism in the geothermal well.

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