Correction drilling television video orientation device and its use method

Abstract

The present invention discloses a device for correcting drilling television video orientation. It comprises a coaxial double-wire wheel, an orientation line, an orientation device bracket, a handle and an orientation lug; one end of the orientation line is wound around the coaxial double-wire wheel, and the other end is connected to the orientation lug; the coaxial double-wire wheel is located on the orientation device bracket; the handle is connected to the coaxial double-wire wheel. The present invention overcomes the disadvantage that the direction error calibrated by the compass in the prior art is large, which has seriously affected the quality of geological survey results; it has the advantages of economically, accurately and efficiently correcting drilling television video. The present invention also discloses a method for using the device for correcting drilling television video orientation.

Description

Technical Field

[0001] The present invention relates to the field of engineering drilling technology, and more specifically to a device for correcting the orientation of drilling television video recordings. The present invention also relates to a method for using the device for correcting the orientation of drilling television video recordings. Background Art

[0002] At present, all borehole video recording devices are equipped with directional compasses to achieve the purpose of clearly identifying the inclination of strata, fissures, and faults in the borehole. In actual work, the direction error marked by this compass is very large. Two video recording tests on the same borehole and the same fissure show that the inclination of the same fissure differs by about 40 to 100 degrees (some of the same fissures even differ by 140 degrees), which has seriously affected the quality of geological survey results. In engineering areas where faults are particularly developed, this error causes the faults of multiple boreholes to be unable to be extended; in sedimentary rock areas, the inability to correctly determine the occurrence of rock strata is a major hidden danger to the safety of underground engineering construction.

[0003] Therefore, there is an urgent need to develop an economical, accurate and efficient borehole television recording direction calibration method. Summary of the invention

[0004] The first purpose of the present invention is to provide a device for correcting the orientation of drilling television recordings, which uses a directional lump at the bottom of the borehole to connect the borehole mouth and calibrate the direction inside the borehole, so as to achieve the purpose of correcting the inclination of the drilling television recordings, cracks, and faults, and economically, accurately, and efficiently correct the drilling television recordings, realize the accurate determination of the orientation of the drilling television recordings, improve the quality and accuracy of engineering geological survey results, and ensure the safety and smooth construction of underground projects.

[0005] The second object of the present invention is to provide a method for using a drilling television video orientation correction device.

[0006] In order to achieve the first object of the present invention, the technical solution of the present invention is: a device for correcting the orientation of drilling television recording, characterized in that it includes a coaxial double-wire wheel, an orientation wire, an orientation device bracket, a handle and an orientation lump;

[0007] One end of the directional line is wound on the coaxial double-wire wheel, and the other end is connected to the directional ball;

[0008] The coaxial double-wire wheel is located on the orientation device bracket; the handle is connected with the coaxial double-wire wheel.

[0009] In the above technical solution, a groove is arranged on the top of the directional device bracket; and the coaxial double-wire wheel is installed in the groove along the north-south direction.

[0010] In the above technical solution, a first wire wheel and a second wire wheel are arranged on the coaxial double wire wheel;

[0011] The orientation line includes a first orientation line and a second orientation line;

[0012] A connection hole is arranged on the upper part of the directional lump; the connection hole comprises a first connection hole and a second connection hole;

[0013] The upper end of the first directional wire is wound around the first wire wheel, and the lower end is connected to the first connecting hole;

[0014] The upper end of the second directional wire is wound around the second wire wheel, and the lower end is connected to the second connecting hole.

[0015] In the above technical solution, the first orientation line is a blue line;

[0016] The second orientation line is the purple line.

[0017] In the above technical solution, the oriented lump has a sheet-like structure.

[0018] In the above technical solution, the directional lump is in a T-shaped structure;

[0019] The upper part of the directional lump is 5-6 cm wide, the lower part is 3-4 cm wide, 2-3 cm thick, and 10-15 cm high;

[0020] The oriented lump is a metal oriented lump, weighing 3 to 5 kg.

[0021] In order to achieve the second object of the present invention, the technical solution of the present invention is: the method for using the drilling TV video orientation correction device is characterized by comprising the following steps:

[0022] Step 1: Use a compass to determine the south direction, arrange the directional device bracket along the north-south diameter direction of the borehole, and fix the directional device bracket on the north and south sides of the borehole;

[0023] Use a level to calibrate so that the heights of both sides of the directional device bracket are consistent, and the center line of the grooves of the two brackets points to due south and due north;

[0024] Step 2: Place the axles of the coaxial double-wire wheels wound with the directional wires in the grooves on the brackets on both sides of the borehole, and connect the first directional wire and the second directional wire to the connection holes on both sides of the upper part of the directional lump;

[0025] Step 3: Place the directional ball in the drill hole, shake the handle, and slowly place the directional ball at the bottom of the drill hole through the directional line;

[0026] The handle is fixed to limit the rotation of the coaxial double-wire wheel; then the drilling video recording device is used to perform the drilling video recording.

[0027] In the above technical solution, the first orientation line is located on the south side wall of the borehole; the second orientation line is located on the north side wall of the borehole.

[0028] The present invention has the following advantages:

[0029] (1) The present invention solves the problem of inaccurate orientation of drilling television recordings, improves the quality and accuracy of survey results, eliminates the hidden dangers of underground engineering safety caused by errors in the orientation of strata, cracks, and faults, and provides accurate basic data for the safe and smooth construction of underground engineering.

[0030] (2) The device of the present invention is low-cost, with a single set costing less than RMB 300, and can be used repeatedly.

[0031] (3) The device of the present invention is exquisite, simple and easy to manufacture; the method of use is simple, easy to use, easy to learn and master, and is conducive to wide promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention.

[0033] Figure 2 It is a schematic diagram of the structure of the directional lump in the present invention.

[0034] Figure 3 It is a schematic structural diagram of the orienting device support in the present invention.

[0035] Figure 4 It is a schematic diagram of the connection structure between the coaxial double-wire wheel and the handle in the present invention.

[0036] Figure 5 It is a schematic diagram of the working structure of the present invention.

[0037] Figure 6 It is a drilling video image of the prior art.

[0038] Figure 7 This is the first video recording of the fracture occurrence at a depth of 26.4m in borehole No. 26 using a borehole video recording device in the verification test of the present invention.

[0039] Figure 8 This is the second video recording of the fracture occurrence at a depth of 26.4m in borehole No. 26 using a borehole video recording device in the verification test of the present invention.

[0040] Fig. 9 This is the first video recording of the fracture occurrence at a depth of 76.3m in borehole No. 26 using a borehole video recording device in the verification test of the present invention.

[0041] Fig.10 This is the second video recording of the fracture occurrence at a depth of 76.3m in borehole No. 26 using a borehole video recording device in the verification test of the present invention.

[0042] Fig.11 This is the first television video recording of the fracture occurrence at a depth of 49.6m in borehole No. 34 after the present invention was adopted.

[0043] Fig.12 This is the second television video recording of the fracture occurrence at a depth of 49.6m in borehole No. 34 after the present invention was adopted.

[0044] Fig.13 This is the first television video recording of the fracture occurrence at a depth of 86.7m in borehole No. 34 after the present invention was adopted.

[0045] Fig.14 This is the second television video recording of the fracture occurrence at a depth of 86.7m in borehole No. 34 after the present invention was adopted.

[0046] Fig.10 In the figure, A represents the fracture in the fracture occurrence diagram.

[0047] Figure 8 , Fig. 9 , Fig.13 The N, E, S, W, and N at the top represent the four directions of north, south, east, and west respectively.

[0048] Figure 7 This is a fissure occurrence diagram showing the first TV recording of the No. 26 borehole at a depth of 26.4m; Figure 7 It can be seen that the depth of crack A1 is 26.408 meters, the dip is 41.32° south-west, the inclination is 76.05°, and the crack width is 0.0 mm.

[0049] Figure 8 The fracture occurrence diagram of the second TV video recording at the depth of 26.4m in borehole No. 26; Figure 8 It can be seen that the depth of crack A2 is 26.486 meters, the dip is 1.86° south-west, the inclination is 76.05°, and the crack width is 0.0 mm.

[0050] Fig. 9 The fissure occurrence map shows the first TV recording at the depth of 76.3m in borehole No. 26; Fig. 9 It can be seen that the depth of crack B1 is 76.327 meters, the dip is 73.68° south-east, the inclination is 74.16°, and the crack width is 0.0 mm.

[0051] Fig.10 The fracture occurrence diagram of the second TV video recording at the depth of 76.3m in borehole No. 26; Fig.10 It can be seen that the depth of crack B2 is 76.631 meters, the dip is 22.33° south-west, the inclination is 75.01°, and the crack width is 0.0 mm.

[0052] Fig.11 The fissure occurrence map shows the first TV recording of the No. 34 borehole at a depth of 49.6m; Fig.11It can be seen that the depth of crack C1 is 49.591 meters, the dip is 68.72° south-east, the inclination is 58.20°, and the crack width is 0.0 mm.

[0053] Fig.12 The fracture occurrence map shows the second TV video recording at the depth of 49.6m in borehole No. 34; Fig.12 It can be seen that the depth of crack C2 is 49.790 meters, the dip is 70.94° south-west, the inclination is 59.26°, and the crack width is 0.0 mm.

[0054] Fig.13 The fissure occurrence map shows the first TV recording of the No. 34 borehole at a depth of 86.7m; Fig.13 It can be seen that the depth of crack D1 is 86.375 meters, the dip is 24.57° south-west, the inclination is 76.79°, and the crack width is 0.0 mm.

[0055] Fig.14 The fracture occurrence map shows the second TV video recording at the depth of 86.7m in borehole No. 34; Fig.14 It can be seen that the depth of crack D2 is 86.743 meters, the dip is 1.46° south-east, the inclination is 77.90°, and the crack width is 0.0 mm.

[0056] In the figure, 1-coaxial double wire wheel, 1.1-first wire wheel, 1.2-second wire wheel, 2-directional wire, 2.1-first directional wire, 2.2-second directional wire, 3-directional device bracket, 3.1-groove, 4-handle, 5-directional lug, 5.1-connecting hole, 5.11-first connecting hole, 5.12-second connecting hole, 6-drilling video bracket, 7-drilling video cable, 8-drilling video display and recording instrument, 9-drilling video camera, 10-stratum, 11-drilling. DETAILED DESCRIPTION

[0057] The following is a detailed description of the implementation of the present invention in conjunction with the accompanying drawings, but they do not constitute a limitation of the present invention and are only given as examples. At the same time, the advantages of the present invention are made clearer and easier to understand through the description.

[0058] The invention places an orientation ball at the bottom of a borehole, and orientation lines on both sides thereof limit its two ends to point to the south and north respectively; lines are connected from the south and north directions of the bottom of the borehole to the south and north directions of the hole mouth to calibrate the direction of the television video in the borehole, so as to achieve the purpose of verifying the inclination of the strata, cracks and faults in the borehole video.

[0059] Referring to the attached drawings, it can be seen that the drilling TV video orientation device comprises a coaxial double-wire wheel 1, an orientation wire 2, an orientation device bracket 3, a handle 4 and an orientation lump 5;

[0060] One end of the directional wire 2 is wound on the coaxial double-wire wheel 1, and the other end is connected to the directional lump 5;

[0061] The coaxial double-wire wheel 1 is located on the directional device bracket 3; the handle 4 is connected to one end of the coaxial double-wire wheel 1; the device described in the present invention is simple to manufacture, simple to use, takes a short time to descend from the hole mouth to the bottom of the hole, has obvious correction effect and high efficiency.

[0062] Furthermore, a groove 3.1 is provided at the top of the directional device bracket 3; the coaxial double-wire wheel 1 is installed in the groove 3.1 along the north-south direction; there are two brackets, each bracket has a groove provided at the upper end, and both ends of a coaxial double-wire wheel 1 are respectively located in the two grooves 3.1.

[0063] Furthermore, a first wire wheel 1.1 and a second wire wheel 1.2 are arranged on the coaxial double wire wheel 1;

[0064] The orientation line 2 comprises a first orientation line 2.1 and a second orientation line 2.2;

[0065] A connection hole 5.1 is arranged on the upper part of the directional lump 5; the connection hole 5.1 includes a first connection hole 5.11 and a second connection hole 5.12;

[0066] The upper end of the first directional wire 2.1 is wound around the first wire wheel 1.1, and the lower end is connected to the first connecting hole 5.11;

[0067] The upper end of the second orientation wire 2.2 is wound around the second wire wheel 1.2, and the lower end is connected to the second connection hole 5.12.

[0068] Furthermore, the first orientation line 2.1 is a blue line;

[0069] Considering that purple and blue minerals are rare in most rocks, in order to form a sharp contrast with the color of the rock in the video, the second orientation line 2.2 uses purple line, and the first orientation line 2.1 and the second orientation line 2.2 can also use other color lines according to actual conditions.

[0070] Furthermore, the directional ball 5 has a sheet-like structure. The directional ball in the device described in the present invention is sheet-like. If it rotates in the borehole, it will be subject to great resistance from groundwater and the probability of rotation is low. The directional ball is controlled by two directional lines, which are tied at the upper two ends to limit the rotation of the directional ball. At the same time, the upper winding adopts a coaxial double-wire wheel to ensure that the two ends of the directional ball are synchronously downward, and the length of the directional lines at the two ends is always kept consistent to avoid flipping due to inconsistent line lengths. Therefore, the present invention has high accuracy in calibrating the direction of drilling television recording.

[0071] Furthermore, the oriented lump 5 is in a T-shaped structure;

[0072] The upper width of the directional lump 5 is 5 to 6 cm, the lower width is 3 to 4 cm, the thickness is 2 to 3 cm, and the height is 10 to 15 cm;

[0073] The oriented lump 5 is a metal (such as iron, copper, lead, etc.) oriented lump, weighing 3 to 5 kg;

[0074] The diameters of the first connecting hole 5.11 and the second connecting hole 5.12 are both 5 mm.

[0075] Referring to the attached drawings, it can be seen that the method for using the drilling TV video orientation correction device comprises the following steps:

[0076] Step 1: Use a compass to determine the south direction, arrange the orientation device bracket 3 along the north-south diameter direction of the borehole 11, and fix the orientation device bracket 3 on the north and south sides of the borehole 11;

[0077] The height of the orienting device bracket 3 is about 1.5m. Use a level ruler to calibrate so that the heights of both sides of the orienting device bracket 3 are consistent and the center line of the grooves of the two brackets points to the south and the north.

[0078] Step 2: Place the axles of the coaxial double-wire wheel 1 wound with the directional wire 2 in the grooves 3.1 on the brackets on both sides of the borehole, and connect the first directional wire 2.1 and the second directional wire 2.2 to the connecting holes 5.1 on both sides of the upper part of the directional lump 5;

[0079] Step 3: Place the directional lump 5 in the borehole 11, shake the handle 4 outside the coaxial double-wire wheel 1, and slowly place the directional lump 5 at the bottom of the borehole 11 through the directional wire 2;

[0080] The handle 4 on the outside of the coaxial double-wire wheel 1 is fixed to restrict the rotation of the coaxial double-wire wheel 1; then the drilling video recording device is used to perform normal drilling video recording.

[0081] Furthermore, the first orientation line 2.1 is located at the south wall of the borehole 11; and the second orientation line 2.2 is located at the north wall of the borehole 11.

[0082] Example

[0083] The present invention is now described in detail by taking the application of the present invention to the television recording of a certain engineering borehole as an example, which also has a guiding role in the application of the present invention to the television recording of other boreholes.

[0084] The device for correcting the drilling television video orientation described in this embodiment adopts an orientation lump, an orientation line, a bracket, a wire wheel, and a compass to determine the in-hole orientation, so as to connect the orientation lump at the bottom of the borehole with the borehole mouth and calibrate the direction in the borehole.

[0085] The drilling video recording device in this embodiment includes a drilling video recording bracket 6, a drilling video recording cable 7, a drilling video display and recording instrument 8, and a drilling video camera 9; the drilling video display and recording instrument 8 is connected to the drilling video camera 9 through the drilling video recording bracket 6 and the drilling video cable 7; the drilling video recording bracket 6 is located above the borehole 11, and the drilling video display and recording instrument 8 is located on the ground; when working, the drilling video camera 9 is located in the borehole 11; the directional lump 5 has a sheet structure and a T-shaped structure, the upper part of the directional lump 5 is 5 cm wide, the lower part is 3 cm wide, the thickness is 2 cm, and the height is 10 cm; the directional lump 5 is a copper directional lump and weighs about 3 kg; (the directional lump 5 can also be selected from other sizes and materials according to actual use needs).

[0086] The method for using the device for calibrating the drilling video orientation described in this embodiment includes the following steps:

[0087] Step 1: Use a compass to determine the south direction, fix the directional device bracket 3 to the north and south sides of the borehole 11 of the stratum 10, and the height of the directional device bracket 3 is about 1.5m. Use a level ruler to calibrate the heights of the brackets on both sides to make them consistent, and the center line of the grooves of the two directional device brackets 3 points to the south and north;

[0088] Step 2: Use two directional wires of different colors (the first directional wire 2.1 is blue and the second directional wire 2.2 is purple) to connect to the holes on both sides of the upper part of the directional lump, and the upper ends of the two directional wires are wound in two coaxial wire wheels. Place the coaxial double-wire wheel 1 wound with the directional wires in the north-south direction in the grooves on the top of the directional device bracket 3 on both sides of the borehole 11 (one end of the coaxial double-wire wheel 1 axle faces south and the other end faces north);

[0089] Step 3: Place the directional ball in the borehole, shake the handle outside the wire wheel, slowly place the directional ball in the borehole to the bottom of the borehole, fix the handle 4 outside the coaxial double wire wheel 1 to limit the rotation of the coaxial double wire wheel 1; at this time, there is a vertical blue line on the south side of the borehole wall, and a vertical purple line on the north side to clearly mark the direction into the borehole;

[0090] Then, according to the normal borehole television procedure, the geological conditions in the hole are recorded using the borehole television recording device, and the recording results are corrected according to the positions of the blue and purple lines in the well.

[0091] Conclusion: In this embodiment, the orientation markings (i.e., the first orientation line 2.1 and the second orientation line 2.2) on the wall of the borehole 11 are displayed in the video recording results of the drilling television recording device, indicating the accurate direction in the video; after correction using the correction drilling television recording orientation device and the use method thereof described in the present invention, the error rate of the television recording is significantly reduced, the accuracy rate is greatly improved, and the operation is simple and the construction efficiency is high.

[0092] Verification instructions:

[0093] Taking borehole No. 26 of a certain project as an example, the fracture occurrence at the depths of 26.4m and 76.3m of borehole No. 26 was compared, and the results are as follows:

[0094] (1) The data obtained from the first recording of the fracture at 26.4 m using a borehole television recording device are as follows: the dip is 41.32° south-west, i.e. 221.32° (e.g. Figure 7 shown);

[0095] The data obtained from the second recording of the fracture at 26.4m using the borehole TV recording device are: the dip is 1.86° south-west, that is, 181.86° (such as Figure 8 shown);

[0096] The data obtained by the secondary recording using the borehole television recording device differed by 39.46°.

[0097] (2) The data obtained from the first recording of the fissure at 76.3 m using a borehole television recording device are as follows: the dip is 73.68° south by east, i.e. 106.32° (e.g. Fig. 9 shown);

[0098] The data obtained from the second recording of the fracture at 76.3m using the borehole TV recording device are: the dip is 22.33° south-west, that is, 202.33° (such as Fig.10 shown);

[0099] The data obtained by the secondary recording using the borehole television recording device differed by 96.01°.

[0100] However, the prior art generally believes that the inclination direction determined by the compass of the drilling video is accurate and no correction is made.

[0101] After verifying that the inclination of the same crack in two videos of drilling hole No. 26 of a certain project was quite different, the applicant used the device described in the present invention to correct the error of the crack inclination of subsequent drilling holes.

[0102] After adopting the device and method described in the present invention, the drilling hole No. 34 of a certain project was recorded. The device described in the present invention left a marking line of due south (i.e., the second orientation line 2.2) and a marking line of due north (i.e., the first orientation line 2.1) on the wall of the drilling hole (the blue marking line is due north, and the purple marking line is due south). After the drilling hole is recorded, it is displayed in the video.

[0103] Now, the same fissure at the depth of 49.6m and 86.7m of borehole No. 34 of a certain project is recorded twice (Note: the same borehole is recorded twice, and the borehole depth error is about 20cm), and the fissure tendency data are shown in Table 1; the first television recording of the fissure occurrence at the depth of 49.6m of borehole No. 34 after correction by the present invention is shown in Fig.11The second video recording of the fracture occurrence at the depth of 49.6m in borehole No. 34 after correction by the present invention is shown in Fig.12 The first video recording of the fracture occurrence at the depth of 86.7m in borehole No. 34 after correction by the present invention is shown in Fig.13 The second video recording of the fracture occurrence at the depth of 86.7m in borehole No. 34 after correction by the present invention is shown in Fig.14 .

[0104] Table 1 Two video recordings of the same crack at the depth of 49.6m and 86.7m of borehole No. 34 in a certain project

[0105]

[0106] In Table 1, when the first orientation line 2.1 (blue line) is on the left, it means that the orientation system of the borehole video is deflected in the clockwise direction, and the crack inclination = the reading before correction - the azimuth deviation; when the second orientation line 2.2 (purple line) is on the left, it means that the orientation system of the borehole video is deflected in the counterclockwise direction, and the crack inclination = the reading before correction + the azimuth deviation. The azimuth deviation can be read in the borehole video interpretation software, and the estimated reading accuracy is 1 degree.

[0107] From Table 1 above and Figure 11-Figure 14 It can be seen that compared with the inclination and azimuth determined by the compass of the existing borehole video, after correction by the correction borehole TV video orientation device and the use method thereof described in the present invention, the error rate of the TV video is significantly reduced, the accuracy is greatly improved, and the operation is simple, which improves the quality and accuracy of the survey results, eliminates the safety hazards of underground projects caused by the inclination and azimuth errors of strata, cracks and faults, and provides accurate basic data for the safe and smooth construction of underground projects.

[0108] Other parts not described belong to the prior art.

Claims

1. Calibrate the drilling TV video orientation device, Features: It comprises a coaxial double-wire wheel (1), an orientation wire (2), an orientation device bracket (3), a handle (4) and an orientation lump (5); One end of the directional wire (2) is wound on the coaxial double-wire wheel (1), and the other end is connected to the directional lump (5); The coaxial double-wire wheel (1) is located on the orientation device bracket (3); the handle (4) is connected to the coaxial double-wire wheel (1); A groove (3.1) is provided on the top of the directional device bracket (3); the coaxial double-wire wheel (1) is installed in the groove (3.1) along the north-south direction; A first wire wheel (1.1) and a second wire wheel (1.2) are arranged on the coaxial double wire wheel (1); The orientation line (2) comprises a first orientation line (2.1) and a second orientation line (2.2); A connection hole (5.1) is provided on the upper part of the directional lump (5); the connection hole (5.1) comprises a first connection hole (5.11) and a second connection hole (5.12); The upper end of the first directional wire (2.1) is wound on the first wire wheel (1.1), and the lower end is connected to the first connecting hole (5.11); The upper end of the second directional wire (2.2) is wound on the second wire wheel (1.2), and the lower end is connected to the second connecting hole (5.12); The drilling video recording device comprises a drilling video recording bracket (6), a drilling video recording cable (7), a drilling video recording display and recording instrument (8), and a drilling video recording camera (9); the drilling video recording display and recording instrument (8) is connected to the drilling video recording camera (9) through the drilling video recording bracket (6) and the drilling video recording cable (7); the drilling video recording bracket (6) is located above the drilling hole (11), and the drilling video recording display and recording instrument (8) is located on the ground; the drilling video recording camera (9) is located in the drilling hole (11); The first orientation line (2.1) is located on the south side wall of the borehole (11); the second orientation line (2.2) is located on the north side wall of the borehole (11); The first orientation line (2.1) and the second orientation line (2.2) are displayed in the video recording result of the drilling television recording device, indicating the correct direction in the video recording.

2. The device for correcting the drilling television video orientation according to claim 1, Features: The first orientation line (2.1) is the blue line; The second orientation line (2.2) is the purple line.

3. The device for correcting the drilling television video orientation according to claim 2, Features: The oriented lump (5) has a flake structure.

4. The device for correcting the drilling television video orientation according to claim 3, Features: The oriented lump (5) has a T-shaped structure; The directional lump (5) has an upper width of 5 to 6 cm, a lower width of 3 to 4 cm, a thickness of 2 to 3 cm, and a height of 10 to 15 cm; The oriented lump (5) is a metal oriented lump, weighing 3 to 5 kg.

5. A method for using the device for correcting the drilling television video orientation according to any one of claims 1 to 4, Features: The following steps are included: Step 1: Use a compass to determine the south direction, arrange the orientation device bracket (3) along the north-south diameter direction of the borehole (11), and fix the orientation device bracket (3) on the north and south sides of the borehole (11); Use a level to calibrate so that the two sides of the orientation device bracket (3) are at the same height and the center line of the grooves of the two brackets points to due south and due north; Step 2: placing the axles of the coaxial double-wire wheel (1) wound with the directional wire (2) in the grooves (3.1) on the brackets on both sides of the borehole, and connecting the first directional wire (2.1) and the second directional wire (2.2) to the connecting holes (5.1) on both sides of the upper part of the directional lump (5); Step 3: Place the directional lump (5) in the drill hole (11), shake the handle (4), and slowly place the directional lump (5) at the bottom of the drill hole (11) through the directional line (2); The handle (4) is fixed to limit the rotation of the coaxial double-wire wheel (1); and then a drilling video recording device is used to perform drilling video recording.

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