Shallow well circulation sampling monitoring system
By using solar-powered photosensitive and thermal-sensitive control devices, automated downhole sampling is achieved, solving the problems of deep well safety and power shortage in remote areas, and improving the representativeness of samples and the accuracy of monitoring data.
Patent Information
- Application Number
- CN202511322974.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-16
- Publication Date
- 2026-01-27
AI Technical Summary
Existing downhole sampling technologies are difficult to guarantee in deep wells and high-risk environments, and the lack of power infrastructure in remote areas leads to low reliability of electrically driven sampling devices, affecting the representativeness of samples and the accuracy of monitoring data.
Photosensitive and thermally sensitive control components powered by solar power generation devices replace manual operation. They utilize changes in light and temperature to trigger the sampling state, achieving automated sampling and avoiding manual intervention and dependence on electricity.
It improves the rationality of sampling timing, enhances sample representativeness and the accuracy of monitoring data, reduces security threats and labor costs, and is suitable for remote areas.
Smart Images
Figure CN121407943A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of shallow well water sample monitoring technology, and more specifically, to a shallow well circulating sampling monitoring system. Background Technology
[0002] Downhole sampling technology mainly relies on two driving methods: one is manual intervention, which requires operators to control the opening and closing of sampling components through mechanical devices (such as sampling ropes and push rods). However, in deep wells (depths exceeding 500m) and high-risk environments (such as toxic gas leaks and well wall collapses), sampling safety is difficult to guarantee. At the same time, the randomness of manual operation can easily lead to sampling time deviations, affecting the representativeness of the samples. The other is electric drive, which uses batteries deployed downhole or external cables to power components such as sampling valves and pumps. Although it can achieve automated sampling, it has obvious limitations, namely, the lack of power infrastructure in remote areas (such as desert oil fields and mountain mines), high battery replacement and maintenance costs, and the long-term humid and high-temperature environment downhole can easily lead to circuit failures, reducing the reliability of the device. Summary of the Invention
[0003] The present invention aims to at least partially solve one of the technical problems in the related art.
[0004] Therefore, embodiments of the present invention propose a shallow well circulation sampling and monitoring system, which has the advantages of convenient sampling and strong sustainability.
[0005] The shallow well circulation sampling monitoring system according to an embodiment of the present invention includes: A power supply component, the power supply component including a solar power generation device, the solar power generation device being arranged at the wellhead; A first sampling assembly includes a photosensitive control element and a first sampling element. The photosensitive control element is connected to the solar power generation element, and the first sampling element is connected to the photosensitive control element. At least a portion of the first sampling element is placed in a shallow well for sampling liquid in the shallow well. The solar power generation element is used to provide the required electrical energy to the first sampling assembly, and the photosensitive control element is used to control the sampling state of the first sampling element according to the illumination status. A second sampling assembly includes a thermistor and a second sampling element. The thermistor is connected to the solar power generator, and the second sampling element is also connected to the thermistor. At least a portion of the second sampling element is placed within a shallow well for sampling liquid within the well. The solar power generator provides the necessary electrical energy to the second sampling assembly, and the thermistor controls the sampling state of the second sampling element based on temperature changes. One of the first sampling component and the second sampling component is in a sampling state, and the other of the first sampling component and the second sampling component is in a non-sampling state.
[0006] The shallow well circulation sampling and monitoring system of this invention replaces manual operation with photosensitive and thermally sensitive control components, eliminating safety threats (such as toxic gases and well wall collapse) in deep wells and high-risk environments, while reducing labor costs. The triggering mechanism based on environmental parameters (light intensity and temperature) improves the rationality of sampling timing, enhances the representativeness of samples, and improves the accuracy of monitoring data.
[0007] In some embodiments, the first sampling member includes a first sampling section, the first sampling section having a first sampling cavity, a first inlet and a first sampling port, the first sampling port and the first inlet are both connected to the first sampling cavity, and the first sampling port is connected to the photosensitive control member, the photosensitive control member being used to control the opening and closing of the first sampling port.
[0008] In some embodiments, the first sampling port and the first inlet port are arranged at a distance from each other in the height direction of the first sampling section, and the first sampling port is located below the first inlet port.
[0009] In some embodiments, the first sampling member further includes a first filter and a first baffle. The first filter is disposed in the first inlet, and the first baffle is connected to the first sampling part and placed in the first sampling cavity. The first baffle is used to block the first sampling port. In a plane orthogonal to the extension direction of the first inlet, the projected area of the first baffle is larger than the projected area of the first sampling port.
[0010] In some embodiments, the shallow well circulation sampling monitoring system of the present invention further includes a pressurizing component, which includes a pressurizing section and a pressurizing pipeline. A first end of the pressurizing pipeline is connected to the pressurizing section, and a second end of the pressurizing pipeline is connected to the first sampling section. The pressurizing section is electrically connected to the power supply component, which provides electrical energy to the pressurizing section. The pressurizing section is used to introduce pressurized gas into the first sampling section.
[0011] In some embodiments, the first sampling member further includes a detection unit, which is connected to the first sampling unit and placed inside the first sampling chamber, and the detection unit is used to detect the liquid level height inside the first sampling chamber.
[0012] In some embodiments, the power supply component further includes a heat-absorbing element, the second sampling element includes a second sampling section, the second sampling section has a second sampling chamber, a second inlet and a second sampling port, the second inlet and the second sampling port are both connected to the second sampling chamber, the thermal control element is connected to the second sampling section and placed in the second sampling chamber, the thermal control element is connected to the heat-absorbing element through a heat transfer tube, the thermal control element expands and connects the second inlet to the second sampling chamber when the temperature of the heat-absorbing element rises to a preset temperature.
[0013] In some embodiments, the second sampling member further includes a second filter section, the second inlet is located at the bottom of the second sampling section, and the second filter section is connected to the second inlet.
[0014] In some embodiments, the second sampling element further includes a one-way valve connected between the second filter section and the second sampling section, and the flow path of the one-way valve is from the second filter section to the second sampling section.
[0015] In some embodiments, the second sampling unit further has a pressure relief port, which is connected to the second sampling chamber and located at the top of the second sampling unit. A control valve is provided in the pressure relief port to make the pressure in the second sampling chamber reach a preset pressure value, and the control valve is in the open state. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the layout of the shallow well circulation sampling monitoring system (the installation of the structure and functional components of the first sampling component) according to an embodiment of the present invention.
[0017] Figure 2 This is a schematic diagram of the structure of the first sampling component of the shallow well circulation sampling and monitoring system according to an embodiment of the present invention.
[0018] Figure 3 This is a schematic diagram of the layout of the shallow well circulation sampling monitoring system (structure of the second sampling component) according to an embodiment of the present invention.
[0019] Figure label: 100. Shallow well; 200. Extraction pump. 1. Power supply components; 11. Solar power generation components. 2. First sampling component; 21. Photosensitive control component; 22. First sampling component; 221. First sampling chamber; 222. First inlet; 223. First sampling port; 23. First filter section; 24. First baffle; 25. Detection section. 3. Second sampling assembly; 31. Thermistor control component; 32. Second sampling component; 321. Second sampling chamber; 322. Second inlet; 323. Second sampling port; 33. Second filter section; 34. One-way valve; 35. Pressure relief port; 36. Heat absorption component; 37. Heat transfer tube. 4. Pressurizing components; 41. Pressurizing section; 42. Pressurizing pipeline. Detailed Implementation
[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0021] like Figures 1-3 As shown, the shallow well circulation sampling monitoring system of this invention includes: a power supply component 1, a first sampling component 2, and a second sampling component 3.
[0022] The power supply assembly 1 includes a solar power generator 11, which is arranged at the wellhead. The first sampling assembly 2 includes a photosensitive control element 21 and a first sampling element 22. The photosensitive control element 21 is connected to the solar power generator 11, and the first sampling element 22 is connected to the photosensitive control element 21. At least a portion of the first sampling element 22 is placed within the shallow well 100 for sampling liquid within the shallow well 100. The solar power generator 11 provides the necessary electrical energy to the first sampling assembly 2, and the photosensitive control element 21 controls the sampling state of the first sampling element 22 according to the illumination status. The second sampling assembly 3 includes a thermal control element 31 and a second sampling element 32. The control unit 31 is connected to the solar power generation unit 11, and the second sampling unit 32 is connected to the thermal control unit 31. At least a portion of the second sampling unit 32 is placed in the shallow well 100 for sampling the liquid in the shallow well 100. The solar power generation unit 11 is used to provide the required electrical energy to the second sampling unit 3. The thermal control unit 31 is used to control the sampling state of the second sampling unit 32 according to the temperature change. One of the first sampling unit 2 and the second sampling unit 3 is in the sampling state, and the other of the first sampling unit 2 and the second sampling unit 3 is in the non-sampling state.
[0023] Specifically, such as Figure 1 and Figure 2As shown, the power supply component 1 includes a solar power generator 11, which is arranged at the wellhead. The solar power generator 11 is connected to the photosensitive control element 21 of the first sampling component 2 and the thermal control element 31 of the second sampling component 3 via wires, providing power to both. The photosensitive control element 21 is directly connected to the solar power generator 11 to receive power; it is also connected to the first sampling component 22 (such as a sampling pump or valve) to control its operation. Part of the first sampling component 22 is placed inside the shallow well 100, or the entire first sampling component 22 is placed inside the shallow well 100 for liquid sampling operations, and its operation is driven by the photosensitive control element 21.
[0024] The thermal control unit 31 is connected to the solar power generation unit 11 to receive electrical energy; it is also connected to the second sampling unit 32 to control its operation. The second sampling unit 32 is partially placed in the shallow well 100 or entirely placed in the shallow well 100 for liquid sampling operations, and its operation is driven by the thermal control unit 31.
[0025] Understandably, the solar power generation unit 11 utilizes natural sunlight at the wellhead to generate electricity, eliminating the need for external power infrastructure (such as the power grid or batteries). This makes it particularly suitable for remote areas (desert oil fields, mountain mines, etc.), solving the problem of power shortages. The photosensitive control unit 21 controls the sampling status based on the lighting conditions (e.g., day / night). For example, sampling is initiated during the day when there is sufficient sunlight and stopped at night, achieving automated operation without human intervention. Sampling is triggered by ambient light signals, avoiding time deviations caused by manual operation, ensuring consistency in sampling time, and improving sample representativeness. Furthermore, the high efficiency of solar power generation during the day, combined with simultaneous sampling operations, optimizes energy utilization efficiency.
[0026] The thermal control unit 31 controls the sampling status based on downhole temperature changes (such as daily average temperature difference), for example, initiating sampling during specific periods of low or high temperature to supplement the sampling cycle of the first component. Temperature changes are often related to the chemical properties of liquids (such as solubility and gas release), and thermal control allows for more scientific selection of sampling timing, enhancing the analytical value of samples. In addition, the second sampling unit 32 serves as a backup for the first component, and can still trigger sampling by temperature in cases of insufficient light (such as cloudy or rainy days), preventing system failure due to a single malfunction.
[0027] It should be noted that the sampling pump 200 can be used to collect the sample liquid stored in the first sampling unit 22 and the second sampling unit 32 separately, so that the collected sample liquid can be tested separately to ensure the accuracy of the test.
[0028] Therefore, the shallow well circulation sampling monitoring system of this invention replaces manual operation with photosensitive and thermally sensitive control components 31, eliminating safety threats (such as toxic gases and well wall collapse) in deep wells and high-risk environments, while reducing labor costs. The triggering mechanism based on environmental parameters (light intensity and temperature) improves the rationality of sampling timing, enhances the representativeness of samples, and improves the accuracy of monitoring data.
[0029] In some embodiments, the first sampling member 22 includes a first sampling section, which has a first sampling cavity 221, a first inlet 222 and a first sampling port 223. The first sampling port 223 and the first inlet 222 are both connected to the first sampling cavity 221, and the first sampling port 223 is connected to a photosensitive control member 21. The photosensitive control member 21 is used to control the opening and closing of the first sampling port 223.
[0030] Specifically, such as Figure 1 and Figure 2 As shown, the first sampling chamber 221 serves as a container for temporarily storing the collected liquid samples. The liquid sample from the shallow well 100 enters the first sampling chamber 221 through the first inlet 222 of the shallow well 100. The photosensitive control element 21 can control the opening and closing of the first sampling space according to different settings, that is, the first sampling element 22 can perform sampling and sample extraction in separate steps.
[0031] Understandably, when solar radiation is strong during the day, the photosensitive switch is in the off state, preventing the external pump from extracting the sample liquid inside the sampler. At this time, the first sampling section can collect the sample liquid first. When solar radiation is low at night, the photosensitive switch is in the on state, the first sampling port 223 is connected, and the external pump starts to work, thereby extracting the sample liquid stored in the sampling device.
[0032] It should be noted that the function of the photosensitive control element 21 is specified from "controlling the sampling state" to directly controlling the physical "on / off" of the first sampling port 223. It is essentially an electrically controlled valve (such as a solenoid valve) triggered by a light signal.
[0033] In some embodiments, the first sampling port 223 and the first inlet port 222 are arranged at intervals in the height direction of the first sampling section, and the first sampling port 223 is located below the first inlet port 222.
[0034] It is understandable that, such as Figure 1 and Figure 2As shown, the first sampling port 223 is located below the first inlet port 222. When the first sampling element 22 is submerged below the liquid surface of the shallow well 100, the pressure inside and outside the first sampling element 22 allows the liquid in the shallow well 100 to enter the first sampling chamber 221 through the first inlet port 222. The first sampling port 223 is connected to the extraction pump 200 via the photosensitive control element 21. When the photosensitive control element 21 is working, the extraction pump 200 can extract the liquid in the first sampling chamber 221 through the first sampling port 223.
[0035] In other words, the spaced arrangement of the first sampling port 223 and the first inlet port 222 allows the liquid to flow out from top to bottom, leaving almost no residue in the cavity and effectively preventing contamination of the next sample by the previous one (cross-contamination). Furthermore, the entire sampling process is driven entirely by differential pressure, eliminating the need for any pumps or other active liquid extraction devices. This further reduces system energy consumption and the demand for solar power generation.
[0036] In some embodiments, the first sampling member 22 further includes a first filter section 23 and a first baffle 24. The first filter section 23 is disposed in the first inlet 222, and the first baffle 24 is connected to the first sampling section and placed in the first sampling cavity 221. The first baffle 24 is used to block the first sampling port 223. In a plane orthogonal to the extension direction of the first inlet 222, the projected area of the first baffle 24 is larger than the projected area of the first sampling port 223.
[0037] It is understandable that, such as Figure 1 and Figure 2 As shown, the well fluid flows in through the first inlet 222. The first filter section 23 is used to filter out impurities such as suspended particles, silt, algae, and small insects that may be present in the fluid, preventing them from entering the first sampling chamber 221. The filtered clean fluid enters the sampling chamber and fills the entire space.
[0038] The first baffle 24 is used to block the first sampling port 223 and is placed inside the first sampling chamber 221. During the sampling process, under the action of pressure difference, the liquid in the shallow well 100 can break through the obstruction of the first baffle 24 and enter the first sampling chamber 221. When the first sampling chamber 221 is filled with liquid, the liquid pressure inside the first sampling chamber 221 can prevent the liquid from flowing out of the first sampling chamber 221.
[0039] In other words, the first filter section 23 can filter out some impurities in the sample solution. In addition, the first baffle 24 forms a structure similar to a one-way valve 34 in the first sampling chamber 221, which can prevent the sample solution entering the first sampling chamber 221 from mixing with the sample solution outside the first sampling chamber 221, thereby avoiding cross-contamination of the sample solution.
[0040] In some embodiments, the shallow well circulation sampling monitoring system of the present invention further includes a pressurizing component 4, which includes a pressurizing part 41 and a pressurizing pipeline 42. The first end of the pressurizing pipeline 42 is connected to the pressurizing part 41, and the second end of the pressurizing pipeline 42 is connected to the first sampling part. The pressurizing part 41 is electrically connected to the power supply component 1, which is used to provide electrical energy to the pressurizing part 41. The pressurizing part 41 is used to introduce pressurized gas into the first sampling part.
[0041] Understandably, the pressurization unit 41 is a power source, which can be an air pump or compressor, used to generate compressed gas (usually air). The pressurization unit 41 is electrically connected to the power supply component 1 (solar power generation component 11) to obtain the electrical energy required for operation. The pressurization unit 41 outputs the generated pressurized gas through the pressurization pipeline 42. The first end of the pressurization pipeline 42 is connected to the output port of the pressurization unit 41. The second end of the pressurization pipeline 42 is connected to the cavity of the first sampling unit, so that the pressurized gas generated by the pressurization unit 41 can be delivered to the first sampling chamber 221 through the pressurization pipeline 42.
[0042] In other words, when extracting the sample liquid from the first sampling chamber 221, a certain pressure of gas is introduced into the first sampling chamber 221 using the pressurizing unit 41, which increases the internal pressure of the first sampling chamber 221, thereby facilitating the discharge of the sample liquid from the first extraction port. In addition, under the action of gas pressure, the sealing between the first baffle 24 and the first inlet 222 can be improved, further reducing the possibility of the sample liquid being interfered with by other liquids.
[0043] In some embodiments, the first sampling member 22 further includes a detection unit 25, which is connected to the first sampling member and placed in the first sampling chamber 221. The detection unit 25 is used to detect the liquid level height in the first sampling chamber 221.
[0044] It is understandable that, such as Figure 1 and Figure 2 As shown, the detection unit 25 is used to detect the liquid level height in the first sampling chamber 221 in real time. Optionally, the detection unit 25 can be an optical liquid level sensor, a capacitive liquid level sensor, etc.
[0045] In other words, when the detection unit 25 detects that the liquid level has reached the preset "full liquid level" height (indicating that the sampling chamber is completely filled and the air has been expelled), it sends a "chamber full" signal to the photosensitive control unit 21. Only then will the photosensitive control unit 21 determine whether another triggering condition (such as whether it is daytime) is met. If met, the next sampling operation is executed. If not met, it continues to wait, maintaining the full state, until the triggering condition is met. This ensures that the sampling time is the optimal moment when the chamber is full and there is sufficient light.
[0046] Therefore, the detection unit 25 is designed to ensure that the cavity is 100% full during each sampling operation. This completely avoids the problem of insufficient sampling volume caused by incomplete filling (such as residual air bubbles or slow water inflow), providing double insurance for "constant volume sampling" and ensuring extremely high data accuracy.
[0047] Optionally, the first baffle 24 can also be an electric baffle, and the first baffle 24 is electrically connected to the detection unit 25. When the detection unit 25 detects that the sample liquid has filled the first sampling chamber 221, it can control the first baffle 24 to close.
[0048] Preferably, multiple detection units 25 can be provided, such as... Figure 1 and Figure 2 As shown, multiple detection units 25 are respectively arranged on the bottom plate and near the top plate of the first sampling chamber 221 to more accurately detect the liquid level information in the first sampling chamber 221.
[0049] In some embodiments, the power supply component 1 further includes a heat absorber 36, and the second sampling component 32 includes a second sampling section having a second sampling cavity 321, a second inlet 322 and a second sampling port 323. The second inlet 322 and the second sampling port 323 are both connected to the second sampling cavity 321. The thermal control component 31 is connected to the second sampling section and placed in the second sampling cavity 321. The thermal control component 31 is connected to the heat absorber 36 through a heat transfer tube 37. When the temperature of the heat absorber 36 rises to a preset temperature, the thermal control component 31 expands and connects the second inlet 322 to the second sampling cavity 321.
[0050] Specifically, such as Figure 3 As shown, the heat absorber 36 is arranged at the wellhead of the shallow well 100, and the heat absorber 36 can be set as an umbrella-shaped structure, which can not only increase the heat absorption area of the heat absorber 36, but also block the wellhead of the shallow well 100 to prevent external impurities from entering the shallow well 100 through the orifice and affecting the test results of the water sample.
[0051] Understandably, the heat absorber 36 is a heat collection device, typically made of a material with high thermal conductivity and high heat capacity (such as a metal block), and its surface may be coated with a dark heat-absorbing coating. Its core function is to efficiently absorb and store solar energy. Thermosensitive control element 31 is connected to the heat absorber 36 via heat transfer pipe 37.
[0052] Preferably, the thermal control element 31 is a heat-sensitive high-expansion shape memory alloy (such as nickel-titanium alloy), which has excellent shape memory effect and superelasticity. That is, during the day, when solar radiation shines on the top heat absorber 36, the heat absorber 36 rapidly absorbs heat (heating rate of about 2-3℃ / min) and transfers the heat to the thermal control element 31 through the heat transfer pipe 37. The temperature of the thermal control element 31 gradually increases (up to 60-80℃, depending on the ambient solar radiation intensity). As the temperature of the inner layer 4 of the thermal tube increases, it undergoes thermal expansion, its diameter increases, and its overall volume increases (maximum is the internal volume of the shell of the second sampling element 32).
[0053] As a result, the increased volume of the thermal control component 31 leads to a decrease in pressure within the second sampling chamber 321, creating a negative pressure (the pressure inside the chamber is 0.02-0.05 MPa lower than the external pressure). At this time, samples from the downhole environment (such as groundwater and soil gas) enter the second sampling chamber 321 through the second inlet 322 under the influence of the pressure difference, thereby enabling the sampling operation of the second sampling component 32.
[0054] Once the liquid is full, sampling is complete. When sunlight weakens (e.g., in the evening), the temperature of the heat absorber 36 and the thermosensitive control element 31 decreases, and the thermosensitive material shrinks. Under the action of its own structure, the thermosensitive control element 31 resets, re-closing the second inlet port 322 and sealing the sample inside the cavity. The sample can then be removed from the second sampling port 323 by extraction using the extraction pump 200.
[0055] In some embodiments, the second sampling member 32 further includes a second filter section 33, and a second inlet 322 is located at the bottom of the second sampling member, with the second filter section 33 connected to the second inlet 322.
[0056] It is understandable that, such as Figure 3 As shown, the second filter section 33 is directly connected to the second sample inlet 322. It can be understood as a component of the sample inlet or an accessory covering the sample inlet. When the thermal control element 31 is not triggered, the second sample inlet 322 is closed (e.g., mechanically blocked by the thermal control element 31), and the second sampling chamber 321 is empty or isolated from the outside.
[0057] The thermal control element 31 expands upon heating, opening the second inlet 322. Since the second inlet 322 is located at the bottom of the sampling section, the liquid in the well flows upwards through the second filter section 33 under hydrostatic pressure. The liquid is first filtered to remove particles such as mud and sand, and then the clean liquid enters from the bottom and fills the second sampling chamber 321. As the liquid continues to flow in, air inside the chamber is expelled from the bottom upwards through any available vent holes (or through the sampling port). Once the chamber is full, the thermal control element 31 cools and contracts, closing the second inlet 322 at the bottom and sealing the sample inside the chamber.
[0058] In some embodiments, the second sampling member 32 further includes a one-way valve 34, which is connected between the second filter section 33 and the second sampling section, and the flow path of the one-way valve 34 is from the second filter section 33 to the second sampling section.
[0059] It is understandable that, such as Figure 3 As shown, when the thermal control component 31 opens the inlet, and the static pressure of the liquid in the well is greater than the pressure in the sampling chamber, the liquid pushes open the valve disc of the one-way valve 34 (or overcomes its opening pressure) and flows smoothly into the second sampling chamber 321.
[0060] Once the sampling chamber is full, the thermal control element 31 cools and closes the second inlet 322, making the entire chamber a closed system. At this point, if the sample liquid inside the chamber expands due to temperature changes or other reasons, it will cause the pressure inside the chamber to rise. This increased pressure will act on the one-way valve 34, attempting to push the liquid back into the well. The one-way valve 34 will immediately respond and close tightly, forming a reliable sealing barrier that completely prevents any backflow, locking the sample inside the sampling chamber.
[0061] In other words, the one-way valve 34 provides a more reliable mechanical seal, completely eliminating backflow, leakage or evaporation loss of the sample due to pressure changes during storage, and ensuring the integrity of the sample volume.
[0062] In some embodiments, the second sampling unit further has a pressure relief port 35, which is connected to the second sampling chamber 321 and located at the top of the second sampling unit. A control valve is provided in the pressure relief port 35 so that the pressure in the second sampling chamber 321 reaches a preset pressure value and the control valve is in the open state.
[0063] It is understandable that, such as Figure 3 As shown, the pressure relief port 35 is located at the top of the second sampling section. The pressure relief port 35 is a dedicated outlet communicating with the second sampling chamber 321; the pressure relief port is used to release pressure or discharge gas. A control valve is located inside the pressure relief port 35, controlling the opening and closing of this passage. The opening state of the pressure relief valve is determined by a preset pressure value. When the pressure inside the chamber exceeds this preset value, the pressure overcomes the spring force or other preload force, opening the valve.
[0064] In other words, when the thermal control element 31 opens the second inlet 322 at the bottom, liquid begins to fill the second sampling chamber 321 from the bottom. Air inside the chamber is forced upwards by the liquid, causing the air pressure inside the second sampling chamber 321 to increase. This pressure is then slowly released through the venting design of the pressure relief valve, ensuring that the chamber is successfully filled with liquid. Once the sample is filled, the inlet is closed, and the sampling chamber becomes a closed system. If the ambient temperature rises significantly (e.g., from low nighttime temperatures to intense daytime sunlight), causing the liquid or residual gas inside the chamber to expand due to heat, the pressure inside the chamber will rise sharply.
[0065] When the pressure rises to the preset opening pressure of the control valve (e.g., 1.5 times atmospheric pressure), the valve is automatically opened. Excess gas and excessive pressure are quickly released to the external environment through the pressure relief port 35, protecting the sampling chamber, connecting pipelines, and seals from damage or leakage due to overpressure.
[0066] Furthermore, it should be noted that multiple first sampling elements 22 and second sampling elements 32 can be arranged, and depending on the liquid conditions inside the shallow well 100, they can be arranged at different depths to collect more samples from different depths, enrich the test results, and allow multiple test results to corroborate each other, thereby enabling a more accurate judgment of changes inside the well and further ensuring the accuracy of the test results.
[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0069] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0070] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0071] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A shallow well circulation sampling monitoring system, characterized in that, include: A power supply component, the power supply component including a solar power generation device, the solar power generation device being arranged at the wellhead; A first sampling assembly includes a photosensitive control element and a first sampling element. The photosensitive control element is connected to the solar power generation element, and the first sampling element is connected to the photosensitive control element. At least a portion of the first sampling element is placed in a shallow well for sampling liquid in the shallow well. The solar power generation element is used to provide the required electrical energy to the first sampling assembly, and the photosensitive control element is used to control the sampling state of the first sampling element according to the illumination status. A second sampling assembly includes a thermistor and a second sampling element. The thermistor is connected to the solar power generator, and the second sampling element is also connected to the thermistor. At least a portion of the second sampling element is placed within a shallow well for sampling liquid within the well. The solar power generator provides the necessary electrical energy to the second sampling assembly, and the thermistor controls the sampling state of the second sampling element based on temperature changes. One of the first sampling component and the second sampling component is in a sampling state, and the other of the first sampling component and the second sampling component is in a non-sampling state.
2. The shallow well circulation sampling monitoring system according to claim 1, characterized in that, The first sampling element includes a first sampling section, which has a first sampling cavity, a first inlet, and a first sampling port. The first sampling port and the first inlet are both connected to the first sampling cavity, and the first sampling port is connected to the photosensitive control element, which is used to control the opening and closing of the first sampling port.
3. The shallow well circulation sampling monitoring system according to claim 2, characterized in that, The first sampling port and the first inlet are arranged at intervals in the height direction of the first sampling section, and the first sampling port is located below the first inlet.
4. The shallow well circulation sampling monitoring system according to claim 3, characterized in that, The first sampling device further includes a first filter section and a first baffle. The first filter section is disposed inside the first inlet, and the first baffle is connected to the first sampling section and placed inside the first sampling cavity. The first baffle is used to block the first sampling port. In a plane orthogonal to the extension direction of the first inlet, the projected area of the first baffle is larger than the projected area of the first sampling port.
5. The shallow well circulation sampling monitoring system according to claim 4, characterized in that, It also includes a pressurizing component, which includes a pressurizing section and a pressurizing pipeline. A first end of the pressurizing pipeline is connected to the pressurizing section, and a second end of the pressurizing pipeline is connected to the first sampling section. The pressurizing section is electrically connected to the power supply component, which is used to provide electrical energy to the pressurizing section. The pressurizing section is used to introduce pressurized gas into the first sampling section.
6. The shallow well circulation sampling monitoring system according to claim 5, characterized in that, The first sampling element further includes a detection unit, which is connected to the first sampling unit and placed inside the first sampling chamber. The detection unit is used to detect the liquid level height inside the first sampling chamber.
7. The shallow well circulation sampling monitoring system according to any one of claims 1-6, characterized in that, The power supply component further includes a heat-absorbing element. The second sampling element includes a second sampling section, which has a second sampling chamber, a second inlet, and a second sampling port. Both the second inlet and the second sampling port are connected to the second sampling chamber. The thermal control element is connected to the second sampling section and placed inside the second sampling chamber. The thermal control element is connected to the heat-absorbing element through a heat transfer tube. When the temperature of the heat-absorbing element rises to a preset temperature, the thermal control element expands and connects the second inlet to the second sampling chamber.
8. The shallow well circulation sampling monitoring system according to claim 7, characterized in that, The second sampling element further includes a second filter section, the second inlet is located at the bottom of the second sampling section, and the second filter section is connected to the second inlet.
9. The shallow well circulation sampling monitoring system according to claim 8, characterized in that, The second sampling component further includes a one-way valve, which is connected between the second filter section and the second sampling section, and the flow path of the one-way valve is from the second filter section to the second sampling section.
10. The shallow well circulation sampling monitoring system according to claim 9, characterized in that, The second sampling section also has a pressure relief port, which is connected to the second sampling chamber and located at the top of the second sampling section. A control valve is provided in the pressure relief port to make the pressure in the second sampling chamber reach a preset pressure value, and the control valve is in the open state.