Borehole television imaging probe
By designing a filter structure and a water inlet structure in the borehole television imaging probe, impurities inside the borehole are filtered in real time, solving the problem of turbid borehole water affecting imaging and improving imaging quality and work efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- AVIC GEOTECHN ENG INST
- Filing Date
- 2025-08-11
- Publication Date
- 2026-05-22
AI Technical Summary
The turbid water inside the borehole reduces imaging quality and affects the accurate assessment of the borehole's internal conditions. Existing water purification measures are inefficient and ineffective.
Design a borehole television imaging probe, comprising a probe body, a filter structure, and a water inlet structure. The filter structure is connected to the probe body and is arranged along the length direction. It has a connecting hole. The water inlet structure is connected to the filter structure. The water inlet end is in sealed contact with the inner wall of the borehole. Turbid water enters the filter structure through the water inlet end. After being filtered by multiple layers of filter screens and activated carbon, impurities are collected on the back side of the probe, and clean water flows back into the borehole.
It enables real-time filtering of impurities during the imaging process, improves water clarity, reduces settling time, increases work efficiency, and meets the requirements of borehole television imaging.
Smart Images
Figure CN224266474U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of borehole television imaging technology, and more particularly to a borehole television imaging probe. Background Technology
[0002] Currently, borehole television imaging technology operates based on optical imaging principles. In practice, a 360° omnidirectional camera is lowered into the borehole to record real-time images of the borehole walls. The acquired images are then stitched and unfolded using relevant software to generate a 3D histogram or a planar unfolded diagram. Based on the obtained images, borehole defects are then described and annotated in detail. During borehole television imaging testing, ensuring the clarity and accuracy of the images requires that the water inside the borehole be clear.
[0003] However, during the drilling stage, the flushing fluids used (such as mud, plant glue, water, etc.) mix with rock and soil debris, resulting in the water in the borehole often containing a large amount of impurities such as mud, sand, and suspended matter. These impurities will seriously interfere with the quality of borehole television imaging, making the image blurry and the details difficult to identify, thus affecting the accurate judgment of the actual situation inside the borehole.
[0004] While some water purification measures exist in related technologies, such as the most common method of adding alum to the borehole to remove impurities from the water, these methods require approximately 24 hours of settling before imaging tests can be performed. This excessive settling time significantly impacts work efficiency, and the water still contains a large amount of non-precipitating flocculent suspended matter after settling. Consequently, the treated water quality still fails to meet the requirements for borehole television imaging tests. Utility Model Content
[0005] This application provides a borehole television imaging probe that can solve the technical problem that the water quality in the borehole is turbid and cannot meet the imaging test requirements.
[0006] In a first aspect, embodiments of this application provide a borehole television imaging probe, characterized in that it is used to extend into a borehole for imaging detection, the borehole television imaging probe comprising:
[0007] The main body of the probe includes the camera;
[0008] A filter structure is connected to the probe body and arranged along the length of the probe body with the camera. The filter structure includes multiple connecting holes for communicating with the outside.
[0009] The water inlet structure is located on the side of the filter structure facing away from the camera and is connected to the filter structure. The water inlet structure has a water inlet channel that communicates with the filter structure. The end of the water inlet channel facing away from the filter structure is the water inlet end, which is used to make a sealing contact with the inner wall surface of the borehole.
[0010] In some embodiments, a sealing ring is fitted around the outer periphery of the water inlet end, the sealing ring being used to form a sealing contact with the inner wall surface of the borehole.
[0011] In some embodiments, the diameter of the sealing ring gradually decreases along the direction from the water inlet structure toward the filter structure.
[0012] In some embodiments, the end of the water inlet channel that is connected to the filter structure is the water outlet end, and the radial dimension of the water outlet end is smaller than the radial dimension of the water inlet end.
[0013] In some embodiments, the radial dimension of the water inlet channel gradually decreases along the direction from the water inlet end toward the water outlet end.
[0014] In some embodiments, the filtering structure includes:
[0015] The filter tube has one end connected to the probe body and the other end connected and connected to the water inlet structure. The filter tube has multiple connecting holes on its peripheral side.
[0016] A first filter screen is disposed inside the filter tube and connected to the filter tube, and the first filter screen is closer to the water inlet structure than the plurality of connecting holes.
[0017] In some embodiments, the filter structure further includes a second filter screen disposed inside the filter tube and connected to the filter tube. The second filter screen is located between the first filter screen and the plurality of communicating holes. The diameter of the filter holes of the second filter screen is r2, and the diameter of the filter holes of the first filter screen is r1. r2 and r1 satisfy: r2 < r1.
[0018] In some embodiments, the filtration structure further includes a filter element disposed inside the filter tube and located on the side of the first filter screen facing away from the water inlet structure.
[0019] In some embodiments, the borehole television imaging probe further includes a connector that is connected to the probe body and is detachably connected to the filter structure.
[0020] In some embodiments, the probe body includes a viewfinder connected to the filter structure, and the camera is disposed within the viewfinder.
[0021] The borehole television imaging probe based on the embodiments of this application has at least the following beneficial effects:
[0022] By connecting the filter structure to the probe body, and arranging the filter structure and camera along the length of the probe body, the filter structure has multiple connecting holes to achieve communication with the outside world. The water inlet structure is assembled on the side of the filter structure facing away from the camera, and the water inlet structure has a water inlet channel communicating with the filter structure. The end of the water inlet channel facing away from the filter structure is the water inlet end. When performing borehole imaging detection, the probe body is first moved towards the bottom of the borehole along the depth direction of the borehole. During this process, the water inlet end can form a sealing structure with the inner wall of the borehole, allowing the turbid water in the borehole to flow into the water inlet channel from the water inlet end, and then into the filter structure. After the turbid water is filtered to remove impurities, it can flow back into the borehole through the connecting holes. The filter structure can collect the impurities in the turbid water on the side of the filter structure facing away from the camera, thereby reducing the impurity content in the water on the side of the filter structure facing the camera, making the water near the camera clearer, thus meeting the requirements of borehole television imaging test. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the structure of a borehole television imaging probe provided in an embodiment of this application;
[0025] Figure 2 A cross-sectional structural diagram of the borehole television imaging probe provided in an embodiment of this application;
[0026] Figure 3 This is a schematic diagram of the probe body located at the borehole, as provided in an embodiment of this application.
[0027] Figure 4 This is a schematic diagram of the structure of the probe body inserted into the borehole according to an embodiment of this application;
[0028] Figure 5 This is a schematic diagram of the structure of the probe body inserted into the bottom of the borehole according to an embodiment of this application.
[0029] 100. Drilling television imaging probe; 10. Probe body; 1. Camera; 20. Filter structure; 201. Connecting hole; 21. Filter tube; 22. First filter screen; 23. Second filter screen; 24. Filter element; 30. Water inlet structure; 301. Water inlet channel; 31. Water inlet end; 32. Sealing ring; 33. Water outlet end; 40. Connector; 50. Viewfinder;
[0030] 200. Drilling. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0032] Please see Figure 1 and Figure 2 This application provides a borehole television imaging probe 100, which is used to extend into a borehole 200 for imaging detection. The borehole television imaging probe 100 includes a probe body 10, a filter structure 20, and a water inlet structure 30. The probe body 10 includes a camera 1. The filter structure 20 is connected to the probe body 10 and the filter structure 20 and the camera 1 are arranged along the length of the probe body 10. The filter structure 20 includes a plurality of connecting holes 201, which are connected to the outside. The water inlet structure 30 is located on the side of the filter structure 20 facing away from the camera 1 and is connected to the filter structure 20. The water inlet structure 30 has a water inlet channel 301 that communicates with the filter structure 20. The end of the water inlet channel 301 facing away from the filter structure 20 is a water inlet end 31, which is used to make a sealing contact with the inner wall surface of the borehole 200.
[0033] Optionally, the probe body 10 is cylindrical in shape, and the camera 1 is a 360° all-angle camera 1. Before drilling 200 imaging detection, the filter structure 20 is connected to the probe body 10, so that the filter structure 20 and the camera 1 are arranged along the length of the probe body 10. The filter structure 20 includes multiple connecting holes 201, and the filter structure 20 can communicate with the outside through the multiple connecting holes 201. Then, the water inlet structure 30 is assembled on the side of the filter structure 20 facing away from the camera 1, and the water inlet structure 30 has a water inlet channel 301 communicating with the filter structure 20. The end of the water inlet channel 301 facing away from the filter structure 20 is the water inlet end 31.
[0034] Combination Figures 3 to 5When performing imaging detection on borehole 200, the probe body 10 is first inserted into borehole 200. At this time, the water inlet structure 30 is located on the side of the filter structure 20 facing the bottom of borehole 200. Then, the probe body 10 is moved towards the bottom of borehole 200 along the depth direction of borehole 200. During this process, the water inlet end 31 can form a sealing structure with the inner wall of borehole 200, so that the turbid water in borehole 200 can flow into water inlet channel 301 from water inlet end 31 and then into filter structure 20. After the turbid water is filtered to remove impurities by filter structure 20, it can flow back into borehole 200 through connecting hole 201. Filter structure 20 can gather impurities in turbid water on the side of filter structure 20 away from camera 1, thereby reducing the impurity content in the water on the side of filter structure 20 facing camera 1, making the water near camera 1 clearer, so as to meet the requirements of borehole 200 television imaging test.
[0035] In addition, as the probe body 10 gradually penetrates to the bottom of the borehole 200, the filter structure 20 can collect impurities in the turbid water at the bottom of the borehole 200. Thus, the process of filtering impurities is completed simultaneously with the insertion of the probe body 10 into the borehole 200, which can save the operation time of letting the water in the borehole 200 stand still and improve work efficiency.
[0036] Please see Figure 1 and Figure 3 In some embodiments, a sealing ring 32 is fitted around the outer periphery of the water inlet end 31, and the sealing ring 32 is used to form a sealing contact with the inner wall surface of the borehole 200.
[0037] Optionally, a sealing ring 32 with an appropriate diameter can be selected according to the diameter of the borehole 200. For example, the diameter of the sealing ring 32 can be slightly larger than the diameter of the borehole 200. When imaging inspection is performed on the borehole 200, since the diameter of the sealing ring 32 is slightly larger than the diameter of the borehole 200, the sealing ring 32 can contact the inner wall surface of the borehole 200 and form a seal. This allows the turbid water in the borehole 200 to flow into the water inlet channel 301 from the water inlet end 31 and then into the filter structure 20, which facilitates the filter structure 20 to filter impurities in the turbid water.
[0038] Please see Figure 1 and Figure 2 In some embodiments, the diameter of the sealing ring 32 gradually decreases along the direction from the water inlet structure 30 toward the filter structure 20.
[0039] Optionally, the diameter of the sealing ring 32 gradually decreases along the direction from the water inlet structure 30 toward the filter structure 20, making the shape of the sealing ring 32 resemble a horn. The sealing ring 32 can have a first open end and a second open end. The diameter of the first open end is smaller than the diameter of the second open end. The first open end is fitted around the outer periphery of the water inlet end 31, and the second open end is used to contact the inner wall surface of the borehole 200 and form a seal, which can better guide turbid water from the water inlet end 31 into the water inlet channel 301.
[0040] Please see Figure 1 In some embodiments, the end of the water inlet channel 301 that is connected to the filter structure 20 is the water outlet 33, and the radial dimension of the water outlet 33 is smaller than the radial dimension of the water inlet 31.
[0041] Optionally, the water inlet channel 301 can extend along the length of the probe body 10, and the end of the water inlet channel 301 that is connected to the filter structure 20 is the water outlet 33. The radial dimension of the water outlet 33 is smaller than the radial dimension of the water inlet 31, so that the water inlet 31 can accommodate more turbid water flowing into the water inlet channel 301, and the turbid water in the water inlet channel 301 can slowly flow into the filter structure 20, so that the filter structure 20 can fully filter out the impurities in the turbid water.
[0042] Please see Figure 1 and Figure 2 In some embodiments, the radial dimension of the water inlet channel 301 gradually decreases along the direction from the water inlet end 31 toward the water outlet end 33.
[0043] Optionally, the water inlet channel 301 is shaped like a horn. When water flows into the water inlet channel 301 from the water inlet end 31, the channel continuously reduces in size in the direction perpendicular to the water flow axis as it flows toward the water outlet end 33. This increases the water flow velocity at the water outlet end 33, allowing the water to pass through the filter structure 20 more smoothly. The filter structure 20 can also better filter out impurities in the turbid water.
[0044] Please see Figure 1 and Figure 2 In some embodiments, the filter structure 20 includes a filter tube 21 and a first filter screen 22. One end of the filter tube 21 is connected to the probe body 10, and the other end of the filter tube 21 is connected to and communicates with the water inlet structure 30. The peripheral side of the filter tube 21 is provided with a plurality of communicating holes 201. The first filter screen 22 is disposed inside the filter tube 21 and connected to the filter tube 21. The first filter screen 22 is closer to the water inlet structure 30 than the plurality of communicating holes 201.
[0045] Optionally, the filter tube 21 is a long straight tube. The first end of the filter tube 21 is connected to the probe body 10, and the second end of the filter tube 21 is connected to and communicates with the water inlet structure 30. The first end and the second end of the filter tube 21 are opposite ends. The part of the filter tube 21 near the probe body 10 is provided with multiple communicating holes 201. The first filter screen 22 is disposed inside the filter tube 21, and the first filter screen 22 is located in the part of the filter tube 21 near the water inlet structure 30, so that the first filter screen 22 is closer to the water inlet structure 30 than the multiple communicating holes 201.
[0046] When the probe body 10 moves towards the bottom of the borehole 200 along the depth direction of the borehole 200, turbid water flows into the filter tube 21 from the water inlet channel 301. After the turbid water is filtered by the first filter screen 22, the first filter screen 22 can block the impurities in the turbid water on the side of the first filter screen 22 facing the water inlet channel 301. The water with the impurities removed can flow back into the borehole 200 through the connecting hole 201, so that the water near the camera 1 can become clearer.
[0047] Please see Figure 2 In some embodiments, the filter structure 20 further includes a second filter screen 23, which is disposed inside the filter tube 21 and connected to the filter tube 21. The second filter screen 23 is located between the first filter screen 22 and the plurality of connecting holes 201. The diameter of the filter holes of the second filter screen 23 is r2, and the diameter of the filter holes of the first filter screen 22 is r1. r2 and r1 satisfy: r2 < r1.
[0048] Optionally, the filter tube 21 has a double-layer filter structure inside, that is, the first filter 22 and the second filter 23 are double-layer filter structures. The first filter 22 and the second filter 23 are arranged at intervals along the axial direction of the filter tube 21, so that a filter space can be formed between the first filter 22 and the second filter 23. The second filter 23 is located between the first filter 22 and the multiple connecting holes 201. The second filter 23 is a fine filter and the first filter 22 is a coarse filter, that is, r2 and r1 satisfy: r2 < r1.
[0049] As the probe body 10 moves towards the bottom of the borehole 200 along the depth direction of the borehole 200, turbid water flows into the filter pipe 21 from the water inlet channel 301. After being filtered by the first filter screen 22 and the second filter screen 23 in sequence, the turbid water flows back into the borehole 200 through the connecting hole 201. In this process, the first filter screen 22 can filter out larger particles in the water, while the second filter screen 23 can filter out fine silt and suspended matter in the water, thus filtering out impurities in the turbid water more thoroughly.
[0050] Please see Figure 1 and Figure 2In some embodiments, the filter structure 20 further includes a filter element 24 disposed inside the filter tube 21 and located on the side of the first filter screen 22 facing away from the water inlet structure 30.
[0051] Optionally, the filter element 24, the second filter screen 23, and the first filter screen 22 can be arranged sequentially along the length of the probe body. The filter element 24 can be activated carbon, which has an extremely rich microporous structure. By utilizing the adsorption effect of activated carbon, it can remove organic impurities such as oil film in turbid water, thereby preventing organic impurities from covering the camera 1 and affecting the test work.
[0052] Please see Figure 1 In some embodiments, the borehole television imaging probe 100 further includes a connector 40, which is connected to the probe body 10 and is detachably connected to the filter structure 20.
[0053] It should be noted that most of the particulate matter in the turbid water in the borehole 200 is blocked below the first filter screen 22. As the particulate matter gradually accumulates below the first filter screen 22, it sinks to the bottom of the borehole 200 due to gravity. The remaining small part of the fine particles in the turbid water is blocked below the second filter screen 23. Tiny organic impurities are located in the activated carbon. After completing the test of one borehole 200 and removing the probe body 10 from the borehole 200, the filter structure 20 needs to be removed to replace the activated carbon, and the first filter screen 22 and the second filter screen 23 need to be cleaned.
[0054] In this embodiment, the filter structure 20 is connected to the probe body 10 via the connector 40. The connector 40 is detachably connected to the filter structure 20, which allows the filter structure 20 to be easily disassembled, the activated carbon to be easily replaced, and the first filter screen 22 and the second filter screen 23 to be cleaned.
[0055] Please see Figure 1 and Figure 2 In some embodiments, the probe body 10 includes a viewfinder 50, which is connected to the filter structure 20, and the camera 1 is disposed within the viewfinder 50.
[0056] Optionally, the viewfinder 50 is made of transparent glass and extends around the probe body 10 along its axis. The camera 1 is located inside the viewfinder 50. The viewfinder 50 can prevent water in the drill hole 200 from contacting the camera 1, and the viewfinder 50 does not affect the normal use of the camera 1.
[0057] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0058] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A borehole television imaging probe, characterized in that, The borehole television imaging probe is used for imaging detection when inserted into the borehole. It includes: The main body of the probe includes the camera; A filter structure is connected to the probe body and arranged along the length of the probe body with the camera. The filter structure includes multiple connecting holes for communicating with the outside. The water inlet structure is located on the side of the filter structure facing away from the camera and is connected to the filter structure. The water inlet structure has a water inlet channel that communicates with the filter structure. The end of the water inlet channel facing away from the filter structure is the water inlet end, which is used to make a sealing contact with the inner wall surface of the borehole.
2. The borehole television imaging probe according to claim 1, characterized in that, A sealing ring is fitted around the outer periphery of the water inlet end, and the sealing ring is used to form a sealing contact with the inner wall surface of the borehole.
3. The borehole television imaging probe according to claim 2, characterized in that, The diameter of the sealing ring gradually decreases along the direction from the water inlet structure toward the filter structure.
4. The borehole television imaging probe according to claim 1, characterized in that, The end of the water inlet channel that is connected to the filter structure is the water outlet, and the radial dimension of the water outlet is smaller than the radial dimension of the water inlet.
5. The borehole television imaging probe according to claim 4, characterized in that, The radial dimension of the water inlet channel gradually decreases along the direction from the water inlet end toward the water outlet end.
6. The borehole television imaging probe according to claim 1, characterized in that, The filtering structure includes: The filter tube has one end connected to the probe body and the other end connected and connected to the water inlet structure. The filter tube has multiple connecting holes on its peripheral side. A first filter screen is disposed inside the filter tube and connected to the filter tube, and the first filter screen is closer to the water inlet structure than the plurality of connecting holes.
7. The borehole television imaging probe according to claim 6, characterized in that, The filter structure further includes a second filter screen, which is disposed inside the filter tube and connected to the filter tube. The second filter screen is located between the first filter screen and the plurality of communicating holes. The diameter of the filter holes of the second filter screen is r2, and the diameter of the filter holes of the first filter screen is r1. r2 and r1 satisfy: r2 < r1.
8. The borehole television imaging probe according to claim 6, characterized in that, The filtration structure further includes a filter element disposed inside the filter tube, and the filter element is located on the side of the first filter screen facing away from the water inlet structure.
9. The borehole television imaging probe according to claim 1, characterized in that, The borehole television imaging probe also includes a connector, which is connected to the probe body and is detachably connected to the filter structure.
10. The borehole television imaging probe according to claim 1, characterized in that, The probe body includes a viewfinder, which is connected to the filter structure, and the camera is disposed within the viewfinder.