Water well repairing device and method based on visual information

Abstract

The invention discloses a water well repairing device and method based on visual information, and aims to solve the technical problems that an existing well repairing method enables the inner diameter of a water well to be reduced, follow-up repairing operation is tedious, efficiency is low, and the water well may be scrapped. The telescopic umbrella-shaped supporting frame body capable of adaptively shrinking according to the pipe diameter of the water well, the tubular water swelling flexible water stop pad opened and closed along with the umbrella-shaped supporting frame body and the wall attaching steel plate are adopted, the high-definition underground television is used for shooting the underground high-definition image for information guidance, and on the premise that the original pipe diameter of the water well is not changed, the water swelling flexible water stop pad can expand when meeting water. And the damaged part of the water well is accurately repaired. According to the method, the construction cost and the construction period of single-time well repair can be saved, the adverse effect on the original structure of the water well in the well repair process can be greatly reduced, the method is suitable for water supply wells and recharge wells of various pipes, the informatization degree is high, and good economic benefits and social benefits can be created.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water supply and drainage, in particular to a water well repairing device and method based on visual information. BACKGROUND

[0002] Water well is one of the common and essential infrastructures in production and life, and is a key facility for extracting underground water or recharging surplus water into underground aquifer. Due to water flow, metal corrosion, external force collision and other reasons, the well pipe (including the inner wall of the well and the filter layer) may be damaged, causing the filter material, soil and sand outside the pipe to flow into the well, affecting the normal use of the well. Since the construction cost of water well, especially deep water well, is high, and the approval procedures for building a new water well are complicated, the damaged part of the well is usually repaired directly. The existing well repairing method is to add a section of casing with a diameter smaller than the inner diameter of the well pipe to the damaged well section, so as to isolate and seal the damaged part of the well pipe. Since the diameter of the repairing casing must be smaller than the diameter of the original well pipe, the inner diameter of the well will be reduced after the first repair, which is equivalent to an obstacle in the well repair section, affecting the pump or the implementation of repairing the well pipe below.

[0003] In addition, due to the unpredictability and randomness of the damage of the water well in the daily operation process, the well pipe of other layers may be damaged after the well pipe of one layer is repaired. The traditional well pipe repairing method requires that all the well repairing casings in the well be removed one by one, and then installed from bottom to top one by one. This method requires a large amount of repetitive operations, which not only wastes a lot of manpower, material resources and well repairing time, but also causes adverse effects on the well pipe during the repeated installation and removal of the casing, affecting the overall service life of the well. When the well pipe below the existing well repairing casing is damaged and cannot be removed, the well cannot be repaired, resulting in the abandonment of the well.

[0004] The information disclosed in this section of the background art is only used to deepen the understanding of the background art of the present disclosure, and should not be regarded as acknowledging or implying in any form that this information constitutes prior art known to those skilled in the art. SUMMARY

[0005] In view of at least one of the above technical problems, the present application discloses a water well repairing device and method based on visual information, which aims to solve the technical problems of the existing well repairing method, i.e. the reduction of the inner diameter of the well, the complicated and inefficient subsequent repair operation, and the possible abandonment of the well.

[0006] According to one aspect of the present disclosure, a water well repair device based on visual information comprises a central rod shaft, umbrella-shaped support frames hinged at corresponding height positions of the central rod shaft, a plurality of wall-attached steel plates hinged at the umbrella rims of the umbrella-shaped support frames, tubular water-swelling flexible water-stopping pads fitted outside each wall-attached steel plate and matched with the inner wall diameter of the water well, grouting openings provided in at least one wall-attached steel plate and the corresponding tubular water-swelling flexible water-stopping pad, a grouting pipe having one end connected to the grouting opening and the other end connected to a ground grouting pump, and a downhole television for determining the damage location and extent of the water well.

[0007] In some embodiments of the present disclosure, the umbrella-shaped support frames comprise a plurality of support rods arranged in a circumferential array with the central rod shaft as the center, and the plurality of wall-attached steel plates are hinged at corresponding end heads of the support rods.

[0008] In some embodiments of the present disclosure, the central rod shaft is provided with mounting rings at corresponding height positions, and each of the support rods is hinged to the mounting rings; the umbrella-shaped support frames further comprise traction ropes fixed to one side of the support rods away from the central rod shaft.

[0009] In some embodiments of the present disclosure, the central rod shaft is provided with at least two groups of umbrella-shaped support frames, and the support rods of each group of umbrella-shaped support frames are correspondingly arranged up and down, and each of the up and down corresponding support rods is hingedly connected to the same wall-attached steel plate.

[0010] According to another aspect of the present disclosure, a construction method based on the above-mentioned water well repair device based on visual information is provided, comprising the following steps: S1: determining the damage location and extent of the water well by using the downhole television, and estimating the required material volume for repair; S2: synchronously lowering the downhole television and the water well repair device into the repair well section, and using the downhole television to accurately position the water well repair device and the water well damage; fixing the central rod shaft of the water well repair device, and pulling the traction ropes to expand the umbrella-shaped support frames so that the wall-attached steel plates press the tubular water-swelling flexible water-stopping pads against the inner wall of the water well; S3: grouting the water well damage through the grouting pipe, and when the grouting volume reaches at least 1.2 times the estimated volume, changing to pressurized injection of clean water; S4: after the solidified body reaches a certain strength, releasing the traction ropes to naturally sag the support rods, and using the downhole television to check and evaluate the repair condition of the water well damage.

[0011] The one or more technical solutions provided in the embodiments of the present application have at least the following any technical effects or advantages: The umbrella-shaped support frame body can be adaptively opened and closed according to the diameter of the water well, the tubular water-swelling flexible water-stopping pad is closed to the inner wall of the water well, the grouting pipe and the grouting pump are used to fill the damaged part of the water well, and the high-definition downhole television is used to shoot the high-definition image of the water well to guide the information, so that the damaged part of the water well is accurately repaired without changing the original pipe diameter of the water well. The umbrella-shaped structure of the umbrella-shaped support frame body can adapt to the diameter of the water well, ensure that the wall-attached steel plate and the tubular water-swelling flexible water-stopping pad are tightly closed to the inner wall of the water well and completely cover the damaged area of the water well, and the grouting technology is used to fill the damaged part of the water well, so that the inner wall of the water well, the filter layer of the water well and the repair slurry are integrated. The technical scheme of the application significantly reduces the disturbance to the well structure during the repair process, avoids the risk of scrapping the water well, greatly saves the repair cost and period, and finally realizes the permanent and same-diameter repair of the damaged part of the water well under the condition of maintaining the original diameter of the well. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the water well repair device based on visual information in an embodiment of the application.

[0013] Figure 2 It is a top view of the water well repair device based on visual information in an embodiment of the application.

[0014] Figure 3 It is an expanded view of the tubular water-swelling flexible water-stopping pad and the wall-attached steel plate in an embodiment of the application.

[0015] Figure 4 It is a schematic view of the downhole television inspecting the water well in an embodiment of the application.

[0016] Figure 5 It is an effect view of the water well repair in an embodiment of the application.

[0017] Figure 6 It is a cross-sectional view of the water well repair in an embodiment of the application.

[0018] In the above figures, 1 is a center rod shaft, 2 is an umbrella-shaped support frame body, 3 is a mounting ring, 4 is a support rod, 5 is a tubular water-swelling flexible water-stopping pad, 6 is a wall-attached steel plate, 7 is a traction rope, 8 is a grouting pipe, 9 is a grouting port, 10 is a grouting pump, 11 is a damaged part of a water well, 12 is an inner wall of a water well, 13 is a filter layer, 14 is a solidified body, 15 is a downhole television, and 16 is a downhole television cable. DETAILED DESCRIPTION

[0019] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The present application relates to "connection", "coupling", unless otherwise specified, including direct and indirect connection (coupling).

[0020] The units, components, structures, mechanisms or sensors involved in the following embodiments are all conventional commercially available products unless otherwise specified.

[0021] In order to better understand the technical solutions of the present application, the above technical solutions will be described in detail below in combination with the drawings and specific embodiments of the specification.

[0022] In order to keep the original pipe diameter of the water well unchanged after repair, and not to affect the subsequent repair of other parts of the water well, save the repair cost and construction period of the water well, and reduce the situation of water well scrapping, the present example discloses a water well repair device based on visual information, as shown in Figure 1 The center rod shaft 1 is fixed at the lower end of the drill pipe of the drilling machine or winch in a screw connection manner, and the umbrella-shaped support frame body 2 is lowered to the designated position in the water well under the driving of the drilling machine or winch. In order to realize the opening and closing of the umbrella-shaped support frame body 2, a convenient installation ring 3 is fixed at the corresponding height of the center rod shaft, and the umbrella-shaped support frame body 2 includes six support rods 4 which are circumferentially arrayed and hinged to the installation ring 3 with the axis of the center rod shaft 1 as the center. A fixed knot is welded on the side of each support rod 4 away from the center rod shaft, and a traction rope 7 is tied on the fixed knot. Under the lifting of the traction rope 7, the support rods 4 open outward with the center rod shaft 1 as the center and match the diameter of the water well.

[0023] In order to cut off the connection between the damaged part 11 of the water well and the inside of the well, six wall-adhering steel plates 6 and tubular water-swelling flexible water-stopping pads 5 are hinged to the corresponding ends of each support rod 4. The six wall-adhering steel plates 6 are arc-shaped steel plates with the same curvature as the tubular water-swelling flexible water-stopping pads 5. The arc-shaped steel plates are arranged at a certain distance on the inside of the tubular water-swelling flexible water-stopping pads 5. Under the action of the opening of the corresponding support rods 4, the tubular water-swelling flexible water-stopping pads 5 are pushed to fit tightly against the inner wall 12 of the water well. The tubular water-swelling flexible water-stopping pads 5 expand to 2 to 3 times their original size when exposed to water, thereby sealing the damaged part 11 of the water well and preventing the subsequent grouting slurry or other repair materials from flowing into the well. Preferably, in order to enable the support rod 4 to stably drive the wall-attached steel plate 6 to open outward, three groups of umbrella-shaped support frames 2 are provided on the central rod axis 1, and the support rods 4 of each group of umbrella-shaped support frames 2 correspond to each other up and down, and the corresponding support rods 4 up and down are respectively hinged to the same wall-attached steel plate 6.

[0024] In order to fill the void at the damaged part 11 of the water well, the water well repair device also includes a grouting port 9 opened at at least one of the wall-attached steel plates 6 and the corresponding tubular water-expandable flexible water-stop pad 5, and a grouting pipe 8 with one end connected to the grouting port 9 and the other end connected to the ground grouting pump 10 through a high-pressure pipe. Grouting is used to solidify the inner wall 12 of the water well, the filter layer 13 of the water well pipe, and the grouting slurry into one, thereby achieving the same-diameter repair of the water well pipe and significantly reducing the adverse effects on the original structure of the water well during the well repair process. At the same time, in order to determine the location and degree of damage to the water well, the grouting port 9 can be accurately positioned at the damaged part 11 of the water well, and a high-definition downhole television 15 is equipped to follow the water well repair device based on visual information downhole construction. Preferably, the downhole television 15 uses a downhole television cable 16 to perform a photographic inspection of the water well.

[0025] In order to save water well repair costs and construction period and achieve accurate water well repair, this embodiment also discloses a construction method of a water well repair device based on visualization information, which specifically includes the following steps: S1: If Figure 4 As shown, a high-definition downhole television 15 is used to photograph and inspect the water well that needs to be repaired, and to record the image data of all the water well pipes to find out the overall quality of the water well, the exact location of the damaged part 11 of the water well, the damaged area and other basic conditions. According to the overall damage condition of the water well, the area of ​​each part that needs to be repaired and the volume of materials required for repair are determined and calculated, and the tubular water-swelling flexible water-stopping pad 5 and the wall-adhering steel plate 6 of the water well repair device are processed according to the repair requirements: the tubular water-swelling flexible water-stopping pad 5 and the wall-adhering steel plate 6 are matched with the inner wall 12 of the water well and the height should be greater than the height of the damaged part 11 of the water well by 0.6m. If the part that needs to be repaired is too large, more than two grouting pipes can be installed to ensure that the damaged part 11 of the water well can be completely filled with grouting.

[0026] S2: The downhole television 15 and the water well repairing device are synchronously lowered to the corresponding well section needing to be repaired, the high-definition image information of the downhole television 15 is used to guide the center of the grouting hole 9 opened on the adhering steel plate 6 and the corresponding tubular water-swelling flexible water-stopping pad 5 to the center of the water well damage 11, and the upper and lower edges of the adhering steel plate 6 and the tubular water-swelling flexible water-stopping pad 5 are greater than 0.3m of the repairing position, so as to achieve the effect of completely covering the water well damage 11. Then the central rod shaft 1 of the water well repairing device is fixed, the traction rope 7 on the supporting rod 4 is lifted to make the adhering steel plate 6 push the tubular water-swelling flexible water-stopping pad 5 to be close to the inner wall 12 of the water well and to be closed to the water well damage 11, so as to completely cut off the connection between the water well damage 11 and the well.

[0027] S3: The cement, water and accelerator are mixed according to a certain proportion to prepare the quick-acting repairing cement slurry, the volume of the prepared repairing cement slurry is 1.2-1.5 times of the calculated plugging amount, and the setting time of the slurry is controlled to be 10-20 minutes. The prepared repairing cement slurry is pressed and injected to the water well damage position through the grouting pipe 8 by the ground grouting pump 10. When the volume of the pressed slurry reaches 1.2 times of the calculated volume, clean water is pressed and injected, so that the clean water maintains a water column with a height of 5-10m in the vertical grouting pipe, the cement slurry column in the grouting pipe 8 is moved downward by the water head pressure formed by the water column, until the cement slurry is pressed and injected to the water well damage 11, so that the cement slurry is filled in the water well damage 11 and is solidified with the filter layer 13 of the water well and the inner wall 12 of the water well into a solidified body 14. The solidified body 14 is durable and does not cause environmental pollution.

[0028] S4: After the solidified body reaches a certain strength, the traction rope 7 and the supporting rod 4 are lowered, the tubular water-swelling flexible water-stopping pad 5 is folded with the adhering steel plate 6 to the central rod shaft 1, the water well repairing device is disassembled, and the downhole television 15 is used to check the repairing condition of the water well damage 11. If there is a quality defect, the repairing can be implemented again. After the repaired well pipe is checked and no quality problem and quality defect are found, the well repairing work is ended, the water well maintains the original well diameter and returns to the normal operation function. Figure 5 、 6 As shown in the figure, the water well damage 11 is permanently solidified and repaired together with the filter layer 13 of the water well and the cement slurry.

[0029] Although some preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all the preferred embodiments and all the changes and modifications falling within the scope of the present application.

[0030] It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed embodiments without departing from the spirit or scope of the disclosure. Thus, it is intended that the present disclosure cover the modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalents.

Claims

1. A water well repair device based on visual information, characterized in that: It includes a central rod shaft, an umbrella-shaped support frame hinged at a corresponding height position of the central rod shaft and used to open and match the diameter of the water well to be repaired, a plurality of wall-adhering steel plates hinged at the umbrella edge of the umbrella-shaped support frame, a tubular water-swelling flexible water-stop pad sleeved on the outside of each of the wall-adhering steel plates and matching the inner wall diameter of the water well, a grouting port opened at at least one of the wall-adhering steel plates and the corresponding tubular water-swelling flexible water-stop pad, a grouting pipe with one end connected to the grouting port and the other end connected to a ground grouting pump, and an underground television for determining the location and degree of damage to the water well.

2. The water well repair device according to claim 1, characterized in that: The umbrella-shaped support frame includes a plurality of support rods arranged in a circular array with the axis of the central rod shaft as the center, and the plurality of wall-attached steel plates are hinged to the corresponding ends of the support rods.

3. The water well repair device according to claim 2, characterized in that: A mounting ring is provided at a height position corresponding to the central rod axis, and each of the support rods is hinged to the mounting ring respectively; the umbrella-shaped support frame also includes a traction rope fixed to the side of the support rod away from the central rod axis.

4. The water well repairing device according to claim 3, characterized in that: At least two groups of umbrella-shaped support frames are provided on the central rod shaft, and the support rods of each group of umbrella-shaped support frames correspond to each other up and down, and the corresponding support rods up and down are respectively hinged to the same wall-attached steel plate.

5. A construction method of a water well repair device based on visual information according to claim 4, characterized in that: The steps include: S1: Use downhole television to determine the location and damage of the well and estimate the volume of materials required for repair; S2: Synchronously lowering the downhole television and the water well repair device into the repair section, and using the downhole television to accurately locate the water well repair device and the damaged part of the well; fixing the central shaft of the water well repair device, pulling the traction rope to open the umbrella-shaped support frame so that the wall-adhering steel plate presses the tubular water-expandable flexible water-stop pad against the inner wall of the well; S3: Grouting is carried out into the damaged part of the well through the grouting pipe until the volume of the grouting liquid reaches at least 1.2 times the estimated volume, and then the pressure injection of clean water is switched; S4: After the solidified body reaches a certain strength, release the traction rope until the support rod hangs naturally, and use downhole television to inspect and evaluate the repair status of the damaged part of the well.

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