Automatic efficient well washing device for deep well dewatering and using method of automatic efficient well washing device

Abstract

The invention discloses an automatic efficient well washing device for deep well dewatering and a using method thereof, and relates to the technical field of well washing devices, the automatic efficient well washing device comprises a clay surface and a well casing, and the well casing is located in the clay surface. The air inlet pipe is externally connected with an air compressor to generate airflow, positive and negative pressure change and alternation are carried out in the well pipe in cooperation with a third valve switch, the positive pressure breaks down mud cakes of a filter pipe, the negative pressure rapidly sucks water in a stratum into a well, and mud in the well is discharged; mud cakes attached to a filter pipe and mud deposited in a well can be quickly and fully damaged and removed; two modes of automatic well washing or manual well washing are achieved by automatically controlling or manually controlling opening and closing of all valves, pressure changes in a well casing are monitored in real time through a pressure gauge (sensor), pressure abnormity is found in time according to data of the sensor and fed back to an automatic control platform, and the automatic control system automatically relieves pressure. And safety accidents such as well pipe fracture and stratum collapse caused by misoperation are avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of well-washing devices, and in particular relates to an automated and efficient well-washing device for deep well dewatering and a method for using the device. Background Art

[0002] During the construction process, foundation pits are often excavated underground. Outer pipes and inner pipes need to be built inside the excavated foundation pits, and a concrete layer is poured between the outer pipes and the inner pipes to provide stable structural support for subsequent concrete pouring and installation of structures such as formwork and steel bars. However, during the excavation of the foundation pit, groundwater often seeps into the tunnel. The penetration of groundwater can easily interfere with the concrete pouring and installation of structures such as formwork and steel bars, threatening construction safety and structural stability. Therefore, a well washing device is needed to lower the groundwater level and provide a stable environment for subsequent construction.

[0003] At present, a commonly used well washing method in well washing devices is the water pump well washing method, which mainly relies on suction force and high-pressure water flow to remove sediment at the bottom of the well and part of the mud skin on the well wall. However, in the process of using the water pump well washing method for well washing, the high-pressure water flow mainly acts on the bottom of the well, and the impact force on the well wall is weak, making it difficult to completely destroy the mud skin with strong adhesion, resulting in limited ability to remove the mud skin on the well wall. For this reason, the present invention proposes an automated and efficient well washing device for deep well dewatering and a method for using the same. Summary of the Invention

[0004] The present invention provides an automated and efficient well-washing device for deep well dewatering and a method for using the device. An air flow is generated by connecting an air inlet pipe to the output end of an air compressor. The device is controlled by switching a third valve to perform positive and negative pressure changes and alternations in the well pipe. The positive pressure can penetrate the mud skin of the filter pipe, while the negative pressure can quickly draw water from the formation into the well and discharge the mud in the well. Subsequently, the device cooperates with the suction action of a water pump and a water outlet pipe to quickly and fully destroy and remove the mud skin attached to the filter pipe and the mud deposited in the well. The device is closed and opened by an automated platform, which is convenient and fast and reduces delays. In extreme cases such as power failures, the valves can be closed and opened manually, realizing both automatic and manual well washing. The pressure changes inside the well pipe are monitored in real time by a pressure gauge (sensor). Pressure anomalies are detected in a timely manner based on the sensor data and fed back to the automated control platform. The automated control system automatically releases the pressure to avoid safety accidents such as well pipe rupture and formation collapse caused by operational errors. In summary, the problems in the background technology are solved.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention provides an automated and efficient well-washing device for deep well dewatering and a method of using the device, which includes a clay surface and a well pipe. The well pipe is located in the clay surface, and the bottom end of the well pipe is fixedly connected to a filter pipe. The well pipe is respectively provided with an air intake pipe, a drain pipe, an exhaust pipe, a vacuum pipe and a water pipe outlet pipe. The outer wall of the air intake pipe is respectively fixedly connected to a pressure reducing valve and a first valve, the outer wall of the drain pipe is fixedly connected to a second valve, the outer wall of the exhaust pipe is fixedly connected to a third valve, the outer wall of the vacuum pipe is fixedly connected to a fourth valve, and the outer wall of the water pipe outlet pipe is fixedly connected to a fifth valve. The bottom ends of the drain pipe and the water pipe outlet pipe both pass through the well pipe and extend into the filter pipe, and the bottom end of the water pipe outlet pipe is fixedly connected to a water pump.

[0007] Furthermore, a pressure gauge is fixedly connected to the top of the well pipe, and a safety valve is fixedly connected to the bottom pipeline of the pressure gauge.

[0008] Furthermore, a spare pipe is fixedly connected to the top of the well pipe, and a sixth valve is fixedly connected to the outer wall of the spare pipe.

[0009] Furthermore, the outer wall of the well pipe is filled with a plurality of clay balls, and the clay balls are located at the bottom of the clay surface.

[0010] Furthermore, a filter material is provided at the bottom end of the clay ball, and the filter material is filled on the outside of the well pipe and the filter pipe.

[0011] A method for using an automated and efficient well-washing device for deep well dewatering, comprising the following steps:

[0012] S1. Connect the air inlet pipe to the output end of the air compressor to generate airflow into the well through the first valve, and open the third valve to use the airflow to directly blow out the loose mud accumulated in the well pipe or near the wellhead. At this time, the other valves are closed;

[0013] S2, then open the first valve to add air, close the remaining valves, and seal the compressed air in the well pipe to form a closed space, then open the third valve, release the pressure quickly, repeat the opening and closing operation of the third valve, causing pressure to form in the well pipe and penetrate the filter tube mud;

[0014] S3. The air compressor injects compressed air into the well through the air inlet pipe and the first valve, increasing the pressure in the well pipe. The high-pressure gas pushes the water level in the well pipe down and pushes some mud upwards.

[0015] During the pressurization process, the water level in the well pipe drops, forming a pressure difference, which causes the water in the formation to seep out through the filter pipe. Then, the third valve is quickly opened, and the compressed air in the well is quickly released, causing the pressure in the well pipe to drop sharply, forming a negative pressure. The water in the formation will quickly flow through the filter pipe into the well.

[0016] S5. Repeat the above steps to achieve rapid well washing through the alternating positive and negative pressures generated by multiple cycles.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This technical solution connects the air inlet pipe to the output end of the air compressor, cooperates with the first valve to inject compressed air into the well to form airflow power, and then cooperates with the switch control of the third valve to perform positive and negative pressure changes and alternations in the well pipe. Positive pressure can break through the mud skin of the filter tube, and negative pressure can quickly suck water in the formation into the well, and at the same time discharge the mud in the well. Then, cooperate with the suction action of the water pump and the water outlet pipe to quickly and fully destroy and remove the mud skin attached to the filter tube and the mud deposited in the well. The entire process can be controlled by the automated platform to accurately close and open all valves, which is convenient and fast, reduces delays, and improves the efficiency and effect of well washing. In extreme cases such as power failures, the valves can be closed and opened manually, realizing two methods of automatic well washing or manual well washing.

[0019] 2. This technical solution uses a pressure gauge (sensor) to monitor the pressure changes inside the well pipe in real time. Based on the sensor data, it promptly detects pressure anomalies and feeds them back to the automated control platform. The automated control system will automatically release pressure to avoid safety accidents such as well pipe rupture and formation collapse caused by operational errors.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of an automated and efficient well-washing device for deep well dewatering and a method of using the same according to the present invention;

[0023] Figure 2 This is a partial structural diagram of an automated and efficient well-washing device for deep well dewatering and a method of using the same according to the present invention;

[0024] Figure 3 This is a partial top view of the structure of an automated and efficient well-washing device for deep well dewatering and a method of using the same according to the present invention;

[0025] Figure 4 This is a schematic diagram of the operating interface of the automatic control valve in the present invention.

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] 1. Clay surface; 2. Well pipe; 3. Filter tube; 4. Air inlet pipe; 5. Pressure reducing valve; 6. First valve; 7. Drain pipe; 8. Second valve; 9. Exhaust pipe; 10. Third valve; 11. Vacuum tube; 12. Fourth valve; 13. Water outlet pipe; 14. Fifth valve; 15. Water pump; 16. Pressure gauge; 17. Spare pipe; 18. Sixth valve; 19. Clay ball; 20. Filter material; 21. Safety valve. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that terms such as "relative", "one end", "inside", "lateral", "end", "two ends", "both sides", "front", "one end face", "the other end face" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. Specific embodiments

[0030] See also Figure 1-Figure 4 As shown, an automated and efficient well washing device for deep well dewatering of the present invention and a method of using the same include a clay surface 1 and a well pipe 2, the well pipe 2 being located in the clay surface 1, the bottom end of the well pipe 2 being fixedly connected to a filter pipe 3, an air intake pipe 4, a drain pipe 7, an exhaust pipe 9, a vacuum pipe 11 and a water pipe outlet pipe 13 being respectively provided on the well pipe 2, the outer wall of the air intake pipe 4 being fixedly connected to a pressure reducing valve 5 and a first valve 6, respectively, the outer wall of the drain pipe 7 being fixedly connected to a second valve 8, the outer wall of the exhaust pipe 9 being fixedly connected to a third valve 10, the outer wall of the vacuum pipe 11 being fixedly connected to a fourth valve 12, the outer wall of the water pipe outlet pipe 13 being fixedly connected to a fifth valve 14, the bottom ends of the drain pipe 7 and the water pipe outlet pipe 13 both pass through the well pipe 2 and extend into the filter pipe 3, and the bottom end of the water pipe outlet pipe 13 being fixedly connected to a water pump 15.

[0031] In the specific implementation process, first operate the air inlet pipe 4 to connect with the output end of the air compressor, first enter the well through the air compressor from the first valve 6, open the third valve 10 to use the air flow to directly blow out the mud accumulated in the well pipe 2, which is relatively loose or close to the wellhead. At this time, the other valves are in the closed state, and then add air through the first valve 6. The pressure reducing valve 5 is used to adjust and control the pressure of the compressed air entering the well pipe 2. The pressure range is 0.1-0.2MPa. All valves are closed, and the compressed air is sealed in the well pipe 2 to form a closed space. Then open the third valve 10. Since the compressed air accumulates in the well pipe 2, the pressure will be released quickly after the third valve 10 is opened. Repeat the opening and closing operation of the third valve 10, resulting in the well pipe 2 being closed. Pressure is formed in the well to break through the mud skin of the filter tube 3, thereby achieving the maximum water output of a single well, and the air compressor injects compressed air into the well through the air inlet pipe 4 and the first valve 6, so that the pressure in the well pipe 2 increases. The high-pressure gas pushes the water level in the well pipe 2 down, and at the same time pushes some mud upward. In the process of pressurization, the water level in the well pipe 2 drops, forming a pressure difference, which prompts the water in the formation to seep out from the filter tube 3. Then, the third valve 10 is quickly opened, and the compressed air in the well is quickly released, causing the pressure in the well pipe 2 to drop sharply, forming a negative pressure, and the water in the formation will quickly flow into the well through the filter tube 3. The positive and negative pressures generated by multiple cycles can achieve the effect of rapid well washing, and the entire process can be controlled by the automation platform to accurately close and open all valves. Figure 4 The operation interface diagram shows that all valves can be opened or closed at the same time, or the independent control mode can be switched to control each valve to open or close individually, which is convenient and fast, reduces delays, and improves the efficiency and effect of well washing. In extreme cases such as power failures, the valves can be closed and opened manually, realizing automatic well washing or manual well washing.

[0032] The top of the well pipe 2 is fixedly connected to a pressure gauge 16 , and the bottom pipeline of the pressure gauge 16 is fixedly connected to a safety valve 21 .

[0033] The pressure gauge (sensor) monitors the internal pressure changes of the well pipe in real time. According to the sensor data, the pressure anomaly is detected in time and fed back to the automatic control platform. The automatic control system will automatically release the pressure to avoid safety accidents such as well pipe rupture and formation collapse caused by operational errors. When the air is pressed in, if the pressure exceeds the safety limit, the safety valve 21 will automatically open, thus ensuring the safety of the well pipe.

[0034] The top of the well pipe 2 is fixedly connected to a spare pipe 17 , and the outer wall of the spare pipe 17 is fixedly connected to a sixth valve 18 .

[0035] The backup pipe 17 serves as a backup channel and can be used in conjunction with the sixth valve 18 to temporarily replace the main pipelines such as the air intake pipe 4 and the drain pipe 7 when a failure occurs.

[0036] The outer wall of the well pipe 2 is filled with a plurality of clay balls 19 , and the clay balls 19 are located at the bottom of the clay surface 1 .

[0037] The clay balls 19 can temporarily seal the space below the wellhead to prevent mud or surface water from directly entering the well pipe 2 , and at the same time play a certain protective role on the filter tube 3 and the filter material 20 to prevent coarse particles from directly impacting the filter tube 3 .

[0038] The bottom end of the clay ball 19 is provided with a filter material 20 , and the filter material 20 is filled on the outside of the well pipe 2 and the filter pipe 3 .

[0039] The filter material 20 can support the filter tube 3 and prevent the surrounding stratum from collapsing, while forming a buffer and filter layer to further prevent fine sand particles in the stratum from entering the filter tube 3 while allowing water to pass through.

[0040] A method for using an automated and efficient well-washing device for deep well dewatering, comprising the following steps:

[0041] S1. Operate the air inlet pipe 4 to connect it to the output end of the air compressor, generating airflow through the first valve 6 into the well, and open the third valve 10 to use the airflow to directly blow out the loose mud accumulated in the well pipe 2 or the mud near the wellhead. At this time, the other valves are closed.

[0042] S2, then open the first valve 6 to add air, close the remaining valves, and seal the compressed air in the well pipe 2 to form a closed space, then open the third valve 10, the pressure is quickly released, and the opening and closing operations of the third valve 10 are repeated, causing pressure to form in the well pipe 2 and penetrate the mud skin of the filter tube 3;

[0043] S3, the air compressor injects compressed air into the well through the air inlet pipe 4 and the first valve 6, increasing the pressure in the well pipe 2. The high-pressure gas pushes the water level in the well pipe 2 down and pushes some mud upwards;

[0044] During the pressurization process, the water level in the well pipe 2 drops, forming a pressure difference, which causes the water in the formation to seep outward from the filter pipe 3. Then, the third valve 10 is quickly opened, and the compressed air in the well is quickly released, causing the pressure in the well pipe 2 to drop sharply, forming a negative pressure. The water in the formation will quickly flow into the well through the filter pipe 3;

[0045] S5. Repeat the above steps to achieve rapid well washing through the alternating positive and negative pressures generated by multiple cycles.

[0046] The circuits, electronic components and chip modules involved in the present invention are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0047] The standard parts used in the application documents can all be purchased on the market. All components in this application document can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology. The electrical components appearing in this document are all electrically connected to the external main controller and power supply, and the main controller is a conventional known device that can play a control role.

[0048] The working principle of the present invention is:

[0049] When the present invention is in use, under the control of the automation platform, the air inlet pipe 4 is first operated to connect with the output end of the air compressor, and the air first enters the well through the first valve 6 through the air compressor, and the third valve 10 is opened to use the air flow to directly blow out the mud accumulated in the well pipe 2, which is relatively loose or close to the wellhead. At this time, the other valves are in the closed state, and then air is added through the first valve 6. The pressure range is 0.1-0.2MPa. All valves are closed, and the compressed air is enclosed in the well pipe 2 to form a closed space. Then the third valve 10 is opened. Since the compressed air accumulates in the well pipe 2, the pressure will be quickly released after the third valve 10 is opened, and the opening and closing operations of the third valve 10 are repeated. The operation causes pressure to form in the well pipe 2 so as to penetrate the mud skin of the filter tube 3, thereby achieving the maximum water output of a single well. The air compressor injects compressed air into the well through the air inlet pipe 4 and the first valve 6, which increases the pressure in the well pipe 2. The high-pressure gas pushes the water level in the well pipe 2 to drop, and at the same time pushes part of the mud upward. In the process of pressurization, the water level in the well pipe 2 drops, forming a pressure difference, which prompts the water in the formation to seep out from the filter tube 3. Then, the third valve 10 is quickly opened, and the compressed air in the well is quickly released, causing the pressure in the well pipe 2 to drop sharply, forming a negative pressure. The water in the formation will quickly flow into the well through the filter tube 3. The positive and negative pressures generated by multiple cycles can achieve the effect of rapid well washing.

[0050] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automated and efficient well-washing device for deep well dewatering and a method for using the same, comprising a clay surface (1) and a well pipe (2), characterized in that: The well pipe (2) is located in the clay surface (1). The bottom end of the well pipe (2) is fixedly connected to a filter pipe (3). An air inlet pipe (4), a drain pipe (7), an exhaust pipe (9), a vacuum pipe (11) and a water outlet pipe (13) are respectively provided on the well pipe (2). The outer wall of the air inlet pipe (4) is fixedly connected to a pressure reducing valve (5) and a first valve (6). The outer wall of the drain pipe (7) is fixedly connected to a second valve (8). The outer wall of the exhaust pipe (9) is fixedly connected to a third valve (10). The outer wall of the vacuum pipe (11) is fixedly connected to a fourth valve (12). The outer wall of the water outlet pipe (13) is fixedly connected to a fifth valve (14). The bottom ends of the drain pipe (7) and the water outlet pipe (13) both pass through the well pipe (2) and extend into the filter pipe (3). The bottom end of the water outlet pipe (13) is fixedly connected to a water pump (15).

2. The automated and efficient well-washing device for deep well dewatering and its use method according to claim 1, characterized in that: The top of the well pipe (2) is fixedly connected to a pressure gauge (16), and the bottom pipeline of the pressure gauge (16) is fixedly connected to a safety valve (21).

3. The automated and efficient well-washing device for deep well dewatering and the method for using the same according to claim 1, characterized in that: The top of the well pipe (2) is fixedly connected to a spare pipe (17), and the outer wall of the spare pipe (17) is fixedly connected to a sixth valve (18).

4. The automated and efficient well-washing device for deep well dewatering and the method for using the same according to claim 1, characterized in that: The outer wall of the well pipe (2) is filled with a plurality of clay balls (19), and the clay balls (19) are located at the bottom of the clay surface (1).

5. The automated and efficient well-washing device for deep well dewatering and the method for using the same according to claim 4, characterized in that: The bottom end of the clay ball (19) is provided with a filter material (20), and the filter material (20) is filled on the outside of the well pipe (2) and the filter pipe (3).

6. A method for using an automated and efficient well-washing device for deep well dewatering according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Operate the air inlet pipe (4) to connect with the output end of the air compressor, generate airflow through the first valve (6) into the well, and open the third valve (10) to use the airflow to directly blow out the mud accumulated in the well pipe (2), which is relatively loose or close to the wellhead. At this time, the other valves are in the closed state; S2, then open the first valve (6) to add air, close the remaining valves, and seal the compressed air in the well pipe (2) to form a closed space, then open the third valve (10) to quickly release the pressure, repeat the opening and closing operation of the third valve (10), causing pressure to form in the well pipe (2) and penetrate the mud skin of the filter tube (3); S3, the air compressor injects compressed air into the well through the air inlet pipe (4) and the first valve (6), so that the pressure in the well pipe (2) increases, and the high-pressure gas pushes the water level in the well pipe (2) down, while pushing part of the mud upward; S4. During the pressurization process, the water level in the well pipe (2) drops, forming a pressure difference, which causes the water in the formation to seep outward from the filter pipe (3). Then, the third valve (10) is quickly opened, and the compressed air in the well is quickly released, causing the pressure in the well pipe (2) to drop sharply, forming a negative pressure, and the water in the formation will quickly flow into the well through the filter pipe (3); S5. Repeat the above steps to achieve rapid well washing through the alternating positive and negative pressures generated by multiple cycles.

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