A coal mine downhole measurement directional drilling system and method

Abstract

The application discloses a coal mine underground while-drilling measurement directional drilling system and method and belongs to the technical field of drilling. The coal mine underground while-drilling measurement directional drilling system comprises a drill bit, a drill rod is installed on the drill bit, a while-drilling movement gas measurement mechanism is installed at the lower part of the drill rod, and a controller is installed at the top end of the drill rod through an electric wire. When a flexible sensor on a sealing sleeve detects the position of a hole wall collapse position, the third rotating cylinder, the slide rail, the moving seat and the multi-section telescopic rod can drive the extrusion ball to move. When the extrusion ball moves to the hole wall collapse position, the multi-section telescopic rod can push the extrusion ball to extrude the sealing sleeve. The extrusion ball can extrude the sealing sleeve into the inside of the hole wall collapse position to seal, so that the hole wall collapse position can be effectively sealed, and the sealing effect of the hole is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drilling technology, in particular to a coal mine underground measurement while drilling directional drilling system and method. BACKGROUND

[0002] In the field of coal mining, directional drilling technology belongs to the drilling and drilling technology system, and is a key technical means for realizing underground gas control, geological anomaly detection and coalbed methane development. Through accurate control of the drilling trajectory, a gas extraction channel can be constructed or coal seam geological parameters can be obtained to support safe and efficient mining of coal mines. Measurement while drilling (MWD) technology, as the core component of the directional drilling system, can collect real-time drilling parameters and drilling trajectory data at the bottom of the well, breaking through the limitations of traditional post-measurement, and ensuring the accuracy of directional drilling. At the same time, the gas concentration in the coal mine underground is a key indicator affecting the safety of mining, and real-time acquisition of gas parameters during drilling is crucial for predicting gas enrichment areas and optimizing extraction schemes.

[0003] The authorized announcement number CN111677495B discloses a coal mine underground directional drilling while drilling gas measurement device, drilling tool and measurement method, relates to the field of bent pipe processing, the while drilling gas measurement device, including a gas measurement unit and a sealing unit for sealing the gap between the gas measurement unit and the borehole wall; the gas measurement unit includes a first outer pipe and a probe pipe arranged in the first outer pipe, and a gap for the flow of high-pressure medium is arranged between the probe pipe and the first outer pipe; a sealing cavity for storing gas is arranged between the outer wall of the probe pipe and the inner wall of the first outer pipe, and a gas inlet hole is arranged on the wall of the first outer pipe and communicates with the sealing cavity; a first control valve is arranged in the gas inlet hole; a gas pressure sensor, a gas concentration sensor and an exhaust fan are arranged in the sealing cavity. The device and the drilling tool are inserted into the borehole together, can measure gas parameters in real time, have timeliness and ensure the accuracy and reliability of the measurement data, but there is a certain space between the borehole wall and the drill pipe when the drill bit is drilling, so that the inner wall of the borehole is easy to collapse when the drill bit is drilling, and the rubber cylinder cannot be effectively sealed when it is in contact with the collapsed place when it expands, and accurate gas concentration data cannot be obtained. SUMMARY

[0004] The purpose of the present application is to provide a coal mine underground measurement while drilling directional drilling system and method, which can push the extrusion ball to move horizontally through the cooperation of multiple telescopic rods, and the extrusion ball can extrude the sealing sleeve into the inside of the collapsed part of the inner wall of the borehole to seal it, so that the inner wall of the borehole can be effectively sealed when it collapses, and the sealing effect of the borehole is improved.

[0005] In order to achieve the above object, the present application provides the following technical scheme: a coal mine underground drilling measurement directional drilling system, comprising: a drill bit, a drill rod is installed on the drill bit, a drilling gas measurement mechanism is installed at the lower part of the drill rod, a controller is installed at the top end of the drill rod through a wire, the drilling gas measurement mechanism comprises an installation pipe, a connecting pipe, a detection assembly, a sealing assembly, an exhaust assembly, a driving assembly and a sealing assembly;

[0006] The lower part of the drill rod is provided with an installation pipe, the installation pipe is provided with a connecting pipe at the axial center of the inner part of the drill rod, and the lower middle and upper parts of the connecting pipe are respectively provided with a detection assembly, an exhaust assembly and a sealing assembly;

[0007] The detection assembly comprises a detection seat, a gas detection module and an air inlet hole, the lower part of the connecting pipe is sleeved with the detection seat, the detection seat is connected with the installation pipe through a bearing, at least two gas detection modules are symmetrically arranged in the inner part of the detection seat, and an air inlet hole is formed in the surface of the installation pipe;

[0008] The sealing assembly comprises a mounting seat and a sealing sleeve, two mounting seats are installed on the upper part of the installation pipe, the two mounting seats are connected with the sealing sleeve, a flexible sensor is arranged in the sealing sleeve, the flexible sensor can detect the collapse part in the drill hole, and the sealing sleeve can be inflated by injecting gas through the air pump to seal the drill hole;

[0009] The exhaust assembly comprises a support seat, an exhaust hole, an exhaust electromagnetic valve and an exhaust passage, the middle part of the connecting pipe is sleeved with the support seat, the support seat is connected with the installation pipe through a bearing, an exhaust hole is formed in the outer surface of the installation pipe close to the support seat, the support seat is internally provided with an exhaust electromagnetic valve, the connecting pipe is internally provided with an exhaust passage in communication with the exhaust electromagnetic valve and the gas detection module, and the top end of the exhaust passage is connected with the air pump.

[0010] Preferably, the detection assembly further comprises an installation groove, the outer surface of the detection seat is symmetrically provided with an installation groove for installing the gas detection module, and the installation groove is in communication with the connecting pipe.

[0011] Preferably, the sealing assembly further comprises a sliding rail, a plurality of telescopic rods, a squeezing ball and a moving seat, the sliding rail is arranged between the mounting seats, the moving seat is movably installed on the sliding rail, the moving seat can move vertically on the sliding rail through a driving member, the plurality of telescopic rods are installed on the moving seat, and the output end of the plurality of telescopic rods is provided with the squeezing ball.

[0012] Preferably, the driving assembly comprises a connecting cylinder and a support rod, the outer surface of the connecting pipe is sleeved with the connecting cylinder, the two ends of the connecting cylinder are rotationally connected to the top of the detection seat and the bottom of the support seat respectively, and the outer surface of the connecting cylinder is fixedly installed with at least three support rods in an annular array, and the other end of the support rod is fixedly installed on the inner wall of the mounting pipe.

[0013] Preferably, the driving assembly further comprises a first rotating cylinder, a second rotating cylinder and a third rotating cylinder, the top end of the detection seat is fixedly installed with the first rotating cylinder at the axial center, the two mounting seats are rotationally installed with the third rotating cylinder at the axial center, the outer surface of the third rotating cylinder is installed with a sliding rail, the inner side of the third rotating cylinder is sleeved with the connecting pipe, the outer surface of the third rotating cylinder is sleeved with the second rotating cylinder, the outer surface of the second rotating cylinder is connected to the axial center of the support seat, and the outer surfaces of the second rotating cylinder and the third rotating cylinder are provided with a channel communicated with the exhaust electromagnetic valve and the exhaust channel.

[0014] Preferably, the driving assembly further comprises a gear ring, a first telescopic rod, a driving motor and a gear, the top end of the first rotating cylinder and the bottom end of the second rotating cylinder and the third rotating cylinder are all installed with the gear ring, the inner side of the connecting cylinder is installed with the first telescopic rod, the output end of the first telescopic rod is installed with the driving motor, and the output end of the driving motor is installed with the gear matched with the gear ring.

[0015] Preferably, the sealing assembly comprises a second telescopic rod, a wedge block, a moving block, an inclined groove and a sealing column, the outer surfaces of the detection seat and the support seat are both fixedly installed with the second telescopic rod through the assembly groove, the output end of the second telescopic rod is fixedly installed with the wedge block with an upward inclined surface, the top of the assembly groove is movably connected with the moving block, the bottom of the moving block is provided with the inclined groove slidably matched with the wedge block, and the side surface of the moving block is fixedly installed with the sealing column matched with the air inlet hole and the exhaust hole.

[0016] Another technical scheme provided by the application is to provide a coal mine underground while-drilling measurement directional drilling method, which comprises the following steps:

[0017] S1: When the drill bit drills to a specified position, the sealing assembly works to inject gas into the cavity between the sealing sleeve and the third rotating cylinder through the air pump, and the sealing sleeve expands and seals with the drill hole after the gas is injected;

[0018] S2: The flexible sensor on the sealing sleeve will also be attached to the borehole, and the flexible sensor will send the attachment result to the controller, which analyzes the attachment data. When the controller detects a large collapse in the inner wall of the borehole, it will send a work instruction to the first telescopic rod. If no collapse is detected in the inner wall of the borehole, no instruction will be sent to the first telescopic rod. When the first telescopic rod is working, it will drive the driving motor and the gear to move vertically. When the gear moves to the side surface of the tooth ring at the end of the third rotating cylinder, it can be meshed and connected with the tooth ring. At this time, the driving motor can drive the tooth ring and the third rotating cylinder to rotate through the gear. When the third rotating cylinder rotates, it will rotate the extrusion ball to the same vertical surface as the collapse in the borehole;

[0019] At this time, the moving seat can move vertically on the slide rail through the driving part. The vertical movement of the moving seat will drive the multi-section telescopic rod and the extrusion ball to move to the corresponding position of the collapse in the borehole. The multi-section telescopic rod can move the extrusion ball horizontally. The horizontal movement of the extrusion ball can extrude the sealing sleeve into the inside of the collapse in the borehole to seal it;

[0020] S3: When the borehole is sealed, the controller sends a work instruction to the second telescopic rod and the first telescopic rod. When the second telescopic rod is working, it can push the wedge to move vertically. When the wedge moves vertically, it can drive the moving block and the sealing column to move horizontally through the cooperation of its own inclined surface and the inclined groove. When the sealing column moves horizontally, it will open the air inlet hole. At the same time, the first telescopic rod can move the gear to the side surface of the tooth ring at the top of the first rotating cylinder for meshing connection.

[0021] S4: When the air inlet hole is opened and the gear is moved to the specified position, the driving motor can drive the first rotating cylinder and the detection seat to rotate through the gear. When the detection seat rotates, it can rotate the installation groove to the side of the air inlet hole. At this time, gas can enter the installation groove. After the gas enters the installation groove, the gas detection module can detect the gas concentration. The gas detection result will be sent to the controller, and the controller will analyze the gas detection data.

[0022] S5: When the controller detects that the gas concentration exceeds the standard, it will send a work instruction to the second telescopic rod and the first telescopic rod. The second telescopic rod can open the exhaust hole through the cooperation of parts. The first telescopic rod can drive the gear to move to the side surface of the tooth ring at the end of the second rotating cylinder for meshing connection. At this time, the driving motor can drive the second rotating cylinder to rotate through the gear. When the second rotating cylinder rotates, it can drive the support seat and the exhaust electromagnetic valve to rotate. When the exhaust electromagnetic valve rotates to the side of the exhaust hole, the exhaust electromagnetic valve is opened. Gas can be transported to the exhaust passage through the exhaust electromagnetic valve, and then discharged by the air pump, thereby reducing the gas concentration in the borehole.

[0023] S6: When the gas detection module detects that the gas concentration is lower than the specified value, the controller sends a work instruction to the gas measuring mechanism, so that the gas measuring mechanism returns to the initial state, and the drill bit continues to drill downward.

[0024] Compared with the prior art, the coal mine drilling measurement directional drilling system and method have the beneficial effects that the coal mine drilling measurement directional drilling system and method.

[0025] 1. When the flexible sensor on the sealing sleeve detects the position of the collapsed inner wall of the drill hole, the third rotating cylinder, the sliding rail, the moving seat and the multi-section telescopic rod cooperate to drive the extrusion ball to move, and when the extrusion ball moves to the collapsed inner wall of the drill hole, the multi-section telescopic rod works to push the extrusion ball to extrude the sealing sleeve, so that the sealing sleeve is extruded into the inside of the collapsed inner wall of the drill hole to be sealed, thereby facilitating effective sealing when the inner wall of the drill hole collapses and improving the sealing effect of the drill hole.

[0026] 2. The second telescopic rod works to push the wedge to move vertically, the inclined surface of the wedge can slide in the inclined groove when the wedge moves vertically, the inclined surface of the inclined groove can be extruded when the wedge vertically slides, the moving block can be horizontally moved when the inclined groove is extruded, the sealing column can be moved when the moving block horizontally moves, and the sealing column can slide in the air inlet hole or the air outlet hole when the sealing column moves, so that the air inlet hole or the air outlet hole can be opened or closed when the sealing column moves out or inserts, thereby facilitating the drill bit and the drill rod to effectively avoid the debris from entering the air inlet hole and the air outlet hole to cause blockage when drilling.

[0027] 3. The support seat rotates to drive the exhaust electromagnetic valve to rotate, the exhaust electromagnetic valve is connected with the air outlet hole when the exhaust electromagnetic valve rotates to the specified position, at this time, the exhaust electromagnetic valve can be opened, the gas can enter the inside of the exhaust electromagnetic valve through the air outlet hole after the exhaust electromagnetic valve is opened, the exhaust electromagnetic valve can deliver the gas to the inside of the exhaust passage, and the gas pump works to discharge the gas after the gas enters the inside of the exhaust passage, thereby facilitating effective reduction of the gas concentration inside the drill hole and improvement of the safety of drilling. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a construction structure schematic view of the present application;

[0029] Figure 2 is a local perspective one solid structure schematic view of the gas measuring mechanism of the present application;

[0030] Figure 3 is a local perspective two solid structure schematic view of the gas measuring mechanism of the present application;

[0031] Figure 4 is a solid sectional structure schematic view of the gas measuring mechanism of the present application from perspective one;

[0032] Figure 5 is the perspective two-stereoscopic sectional structure schematic view of the gas measurement mechanism of the present application;

[0033] Figure 6 is the perspective two-stereoscopic sectional structure schematic view of the gas measurement mechanism of the present application; Figure 4 is the enlarged structure schematic view of part A;

[0034] Figure 7 is the perspective two-stereoscopic sectional structure schematic view of the gas measurement mechanism of the present application; Figure 4 is the enlarged structure schematic view of part B;

[0035] Figure 8 is the gas measurement process structure schematic view of the present application.

[0036] In the figure: 100, drill bit;

[0037] 200, drill rod;

[0038] 300, gas measurement mechanism;

[0039] 310, mounting pipe;

[0040] 320, connecting pipe;

[0041] 330, detection assembly; 331, detection seat; 332, mounting groove; 333, gas detection module; 334, air inlet hole;

[0042] 340, sealing assembly; 341, mounting seat; 342, sealing sleeve; 343, sliding rail; 344, multi-section telescopic rod; 345, extrusion ball; 346, moving seat;

[0043] 350, exhaust assembly; 351, support seat; 352, exhaust hole; 353, exhaust electromagnetic valve; 354, exhaust passage;

[0044] 360, driving assembly; 361, connecting cylinder; 362, support rod; 363, first rotating cylinder; 364, second rotating cylinder; 365, third rotating cylinder; 366, gear ring; 367, first telescopic rod; 368, driving motor; 369, gear;

[0045] 370, sealing assembly; 371, second telescopic rod; 372, wedge block; 373, moving block; 374, inclined groove; 375, sealing column;

[0046] 400, controller. DETAILED DESCRIPTION

[0047] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should fall within the scope of protection of the present application.

[0048] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or vehicle comprising a series of steps or units does not necessarily limit to those clearly listed steps or units, but can include other steps or units not clearly listed or inherent to these processes, methods, products or vehicles.

[0049] In addition, the terms "mount", "set", "provided with", "connected", "connected", "sleeved" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] Please refer to Figures 1-5 The present application provides an embodiment: a coal mine underground measurement while drilling directional drilling system, comprising: drill bit 100, the drill bit 100 is installed with drill pipe 200, the lower part of the drill pipe 200 is installed with gas measurement mechanism 300 moving while drilling, the top end of the drill pipe 200 is installed with controller 400 through wire, the gas measurement mechanism 300 comprises installation pipe 310, connecting pipe 320, detection assembly 330, sealing assembly 340, exhaust assembly 350, drive assembly 360 and closed assembly 370;

[0051] It should be noted that the drill bit 100 in the coal mine drilling will drive the drill pipe 200 and the gas measuring mechanism 300 to follow, and the gas measuring mechanism 300 will move to the corresponding position when following the drill pipe 200, and the controller 400 can be operated to make the gas measuring mechanism 300 work when the drill bit 100 drills to the specified position. The sealing assembly 340 can seal the drill hole first when the gas measuring mechanism 300 works, and the detection assembly 330 can detect the gas after the drill hole is sealed. When the gas concentration is high, the exhaust assembly 350 works to exhaust the gas in the drill hole.

[0052] As shown in Figures 1-5 , the lower part of the drill pipe 200 is provided with a mounting pipe 310, and the inside of the drill pipe 200 is provided with a connecting pipe 320 which is connected to the inside of the drill pipe 200, and the lower part of the connecting pipe 320 is provided with a detection assembly 330, an exhaust assembly 350 and a sealing assembly 340;

[0053] It is conceivable that the mounting pipe 310 is installed on the lower part of the drill pipe 200 close to the drill bit 100, so that the detection assembly 330 can detect the gas more accurately, and the connecting pipe 320 is provided with an optical fiber cable inside, so as to provide power and signals for the related equipment of the gas measuring mechanism 300.

[0054] As shown in Figures 1-5 , Figure 7 , the detection assembly 330 includes a detection seat 331, a gas detection module 333 and an air inlet hole 334, the lower part of the connecting pipe 320 is sleeved with the detection seat 331, the detection seat 331 and the mounting pipe 310 are connected through a bearing, at least two gas detection modules 333 are arranged inside the detection seat 331 in axial symmetry, the surface of the mounting pipe 310 is provided with an air inlet hole 334, the air inlet hole 334 can transport the gas to the gas detection module 333 for detection, the detection assembly 330 further includes a mounting groove 332, the outer surface of the detection seat 331 is provided with a mounting groove 332 for mounting the gas detection module 333 in axial symmetry, and the mounting groove 332 is connected with the connecting pipe 320;

[0055] It is worth noting that the detection seat 331 rotates to drive the mounting groove 332 and the gas detection module 333 to rotate, and when the mounting groove 332 rotates to the specified position, it is connected with the air inlet hole 334. After the mounting groove 332 and the air inlet hole 334 are connected, the gas can enter the mounting groove 332 through the air inlet hole 334, and at this time the gas detection module 333 can detect the gas concentration in the mounting groove 332. When the gas concentration detection is completed, the gas can enter the exhaust passage 354 through the valve of the mounting groove 332 and be exhausted.

[0056] AsFigures 1-6 As shown in the figure, the sealing assembly 340 comprises a mounting seat 341 and a sealing sleeve 342, two mounting seats 341 are mounted on the upper part of the mounting pipe 310, and the two mounting seats 341 are connected with the sealing sleeve 342, the flexible sensor is arranged in the sealing sleeve 342, the sealing sleeve 342 can detect the collapse in the drill hole, and the sealing sleeve 342 can be inflated by the air pump to inject gas into the drill hole;

[0057] It should be understood that when the drill bit 100 moves to the specified position, the air pump works to deliver external gas into the cavity between the sealing sleeve 342 and the third rotating cylinder 365, the gas entering the cavity causes the sealing sleeve 342 to continuously expand, the sealing sleeve 342 expands to contact the inner wall of the drill hole, the sealing sleeve 342 contacts the inner wall of the drill hole to seal the drill hole, and the sealing sleeve 342 contacts the inner wall of the drill hole to drive the flexible sensor to contact the inner wall of the drill hole, and the flexible sensor detects the position of the collapse of the inner wall of the drill hole when the flexible sensor contacts the inner wall of the drill hole.

[0058] As shown in the figure, Figures 2-6 The sealing assembly 340 further comprises a sliding rail 343, a multi-section telescopic rod 344, a pressing ball 345 and a moving seat 346, the sliding rail 343 is arranged between the mounting seats 341, the moving seat 346 is movably mounted on the sliding rail 343, the moving seat 346 can move vertically on the sliding rail 343 by the driving member, the multi-section telescopic rod 344 is mounted on the moving seat 346, and the output end of the multi-section telescopic rod 344 is provided with the pressing ball 345.

[0059] It should be noted that the third rotating cylinder 365 can rotate in the mounting seat 341, the third rotating cylinder 365 can drive the sliding rail 343 to rotate, the sliding rail 343 can drive the moving seat 346, the multi-section telescopic rod 344 and the pressing ball 345 to rotate, when the pressing ball 345 rotates to the same vertical position of the collapse of the inner wall of the drill hole, the driving member on the moving seat 346 works to drive the moving seat 346 to move vertically on the sliding rail 343, the moving seat 346 can drive the multi-section telescopic rod 344 and the pressing ball 345 to move vertically, when the pressing ball 345 moves to the collapse of the inner wall of the drill hole, the multi-section telescopic rod 344 can work, the multi-section telescopic rod 344 can drive the pressing ball 345 to move horizontally when working, the pressing ball 345 can first contact the sealing sleeve 342 when moving horizontally, and the pressing ball 345 can extrude the sealing sleeve 342 into the inside of the collapse of the inner wall of the drill hole to seal when contacting the sealing sleeve 342.

[0060] As shown in the figure, Figures 2-5As shown, the exhaust assembly 350 includes a support seat 351, an exhaust hole 352, an exhaust electromagnetic valve 353, and an exhaust channel 354, the middle part of the connecting pipe 320 is sleeved with the support seat 351, the support seat 351 is connected with the mounting pipe 310 through a bearing, the outer surface of the mounting pipe 310 near the support seat 351 is provided with the exhaust hole 352, the support seat 351 is internally provided with the exhaust electromagnetic valve 353, the inside of the connecting pipe 320 is provided with the exhaust channel 354 which is in communication with the exhaust electromagnetic valve 353 and the gas detection module 333, and the top end of the exhaust channel 354 is connected with the air pump;

[0061] It is conceivable that the support seat 351 can drive the exhaust electromagnetic valve 353 to rotate when rotating, and the exhaust electromagnetic valve 353 can be connected with the exhaust hole 352 when rotating to a specified position, at which time the exhaust electromagnetic valve 353 can be opened, and after the exhaust electromagnetic valve 353 is opened, the gas can enter the inside of the exhaust electromagnetic valve 353 through the exhaust hole 352, and the exhaust electromagnetic valve 353 can deliver the gas to the inside of the exhaust channel 354, and after the gas enters the inside of the exhaust channel 354, the air pump can work to discharge the gas.

[0062] As shown in the figure, Figures 2-6 The driving assembly 360 includes a connecting cylinder 361 and a support rod 362, the outer surface of the connecting pipe 320 is sleeved with the connecting cylinder 361, both ends of the connecting cylinder 361 are rotatably connected at the top of the detection seat 331 and the bottom of the support seat 351, and the outer surface of the connecting cylinder 361 is fixedly installed with at least three support rods 362 in an annular array, and the other end of the support rod 362 is fixedly installed on the inner wall of the mounting pipe 310;

[0063] It is worth noting that the support rod 362 can fix the connecting cylinder 361 on the inner wall of the mounting pipe 310, so that the detection seat 331 and the support seat 351 can rotate with both ends of the connecting cylinder 361 when rotating, and the connecting cylinder 361 provides a relatively sealed space and a mounting position for the first rotating cylinder 363, the second rotating cylinder 364, and the third rotating cylinder 365 and other components when working.

[0064] As shown in the figure, Figures 2-7As shown in the drawings, the driving assembly 360 further comprises a first rotating cylinder 363, a second rotating cylinder 364 and a third rotating cylinder 365, the first rotating cylinder 363 is fixedly installed at the axial center of the top end of the detection seat 331, the third rotating cylinder 365 is rotatably installed at the axial center of the two mounting seats 341, the outer surface of the third rotating cylinder 365 is installed with a sliding rail 343, the inner side of the third rotating cylinder 365 is sleeved with the side of the connecting pipe 320, the outer surface of the third rotating cylinder 365 is sleeved with the second rotating cylinder 364, the outer surface of the second rotating cylinder 364 is connected at the axial center of the supporting seat 351, and the second rotating cylinder 364 is provided with a channel communicated with the exhaust electromagnetic valve 353 and the exhaust channel 354 on the outer surface thereof;

[0065] It can be understood that the first rotating cylinder 363 can drive the detection seat 331 to rotate when rotating, and the detection seat 331 can make the mounting groove 332 and the air inlet hole 334 butt joint when rotating, so that the gas can enter the mounting groove 332 through the air inlet hole 334 to detect the gas concentration;

[0066] The second rotating cylinder 364 can drive the supporting seat 351 to rotate when rotating, and the supporting seat 351 can drive the exhaust electromagnetic valve 353 and the exhaust hole 352 to butt joint when rotating, so that the gas can enter the exhaust channel 354 through the exhaust hole 352 and the exhaust electromagnetic valve 353 after the exhaust electromagnetic valve 353 and the exhaust hole 352 butt joint;

[0067] The third rotating cylinder 365 can rotate in the mounting seat 341 when rotating, and the third rotating cylinder 365 can drive the sliding rail 343, the multi-section telescopic rod 344, the extrusion ball 345 and the moving seat 346 to rotate when rotating, and the sealing sleeve 342 can be extruded when the extrusion ball 345 moves to the specified position.

[0068] As shown in the drawings, Figure 2 , Figures 4-6 The driving assembly 360 further comprises a gear ring 366, a first telescopic rod 367, a driving motor 368 and a gear 369, the top end of the first rotating cylinder 363 and the bottom end of the second rotating cylinder 364 and the third rotating cylinder 365 are all installed with the gear ring 366, the inner side of the connecting cylinder 361 is installed with the first telescopic rod 367, the output end of the first telescopic rod 367 is installed with the driving motor 368, and the output end of the driving motor 368 is installed with the gear 369 matched with the gear ring 366;

[0069] It is conceived that the first telescopic rod 367 can push the driving motor 368 and the gear 369 to move vertically when working, the gear 369 can switch between the toothed rings 366 on the first rotating cylinder 363, the second rotating cylinder 364 and the third rotating cylinder 365 when moving vertically, and the driving motor 368 can drive the gear 369 to rotate when the gear 369 is connected with the corresponding toothed ring 366, the gear 369 can drive the toothed ring 366 to rotate when rotating, and the toothed ring 366 can drive the first rotating cylinder 363, the second rotating cylinder 364 or the third rotating cylinder 365 to rotate when rotating.

[0070] As shown in Figures 2-4 , Figure 7 The sealing assembly 370 includes a second telescopic rod 371, a wedge block 372, a moving block 373, an inclined groove 374 and a sealing column 375, the second telescopic rod 371 is fixedly installed on the outer surfaces of the detection seat 331 and the support seat 351 through the assembly groove, the output end of the second telescopic rod 371 is fixedly installed with the wedge block 372 with an upward inclined surface, the top of the assembly groove is movably connected with the moving block 373, the bottom of the moving block 373 is provided with the inclined groove 374 which is slidably connected with the wedge block 372, and the side surface of the moving block 373 is fixedly installed with the sealing column 375 which is matched with the air inlet hole 334 and the air outlet hole 352.

[0071] It should be noted that the second telescopic rod 371 can push the wedge block 372 to move vertically when working, the inclined surface of the wedge block 372 can slide in the inclined groove 374 when moving vertically, the wedge block 372 can extrude the inclined surface of the inclined groove 374 when vertically sliding, the inclined groove 374 can drive the moving block 373 to move horizontally when being extruded, the moving block 373 can drive the sealing column 375 to move when moving horizontally, and the sealing column 375 can slide in the air inlet hole 334 or the air outlet hole 352 when moving, the air inlet hole 334 or the air outlet hole 352 can be opened or closed when the sealing column 375 moves out or inserts, and the air inlet hole 334 and the air outlet hole 352 can be prevented from being blocked after being closed.

[0072] In order to further better explain the above-mentioned embodiments of the present application, the present application further provides an embodiment of a coal mine downhole measurement directional drilling method, which comprises the following steps:

[0073] S1: When the drill bit 100 drills to a specified position, the sealing assembly 340 works to inject gas into the cavity between the sealing sleeve 342 and the third rotating cylinder 365 through the air pump, and the sealing sleeve 342 is expanded and sealed with the borehole after the gas is injected;

[0074] S2: The flexible sensor on the sealing sleeve 342 will also be attached to the borehole, and the flexible sensor will send the attachment result to the controller 400, which analyzes the attachment data. When the controller 400 detects a large collapse in the inner wall of the borehole, it will send a work instruction to the first telescopic rod 367. If no collapse is detected in the inner wall of the borehole, no instruction will be sent to the first telescopic rod 367. When the first telescopic rod 367 is working, it will drive the driving motor 368 and the gear 369 to move vertically. When the gear 369 moves to the side surface of the tooth ring 366 at the end of the third rotating cylinder 365, it can be meshed and connected with the tooth ring 366. At this time, the driving motor 368 can drive the tooth ring 366 and the third rotating cylinder 365 to rotate through the gear 369. When the third rotating cylinder 365 rotates, it will rotate the extrusion ball 345 to the same vertical surface as the collapse of the borehole;

[0075] At this time, the moving seat 346 can move vertically on the slide rail 343 through the driving part. The vertical movement of the moving seat 346 will drive the multi-section telescopic rod 344 and the extrusion ball 345 to move to the corresponding position of the borehole collapse. The multi-section telescopic rod 344 can drive the extrusion ball 345 to move horizontally. The horizontal movement of the extrusion ball 345 can extrude the sealing sleeve 342 into the inside of the borehole collapse to seal it;

[0076] S3: When the borehole is sealed, the controller 400 sends a work instruction to the second telescopic rod 371 and the first telescopic rod 367. When the second telescopic rod 371 is working, it can drive the wedge 372 to move vertically. When the wedge 372 moves vertically, it can drive the moving block 373 and the sealing column 375 to move horizontally through the cooperation of its inclined surface and the inclined groove 374. When the sealing column 375 moves horizontally, it will open the air inlet hole 334. At the same time, the first telescopic rod 367 can move the gear 369 to the side surface of the tooth ring 366 at the top of the first rotating cylinder 363 to mesh and connect;

[0077] S4: When the air inlet hole 334 is opened and the gear 369 is moved to the specified position, the driving motor 368 can drive the first rotating cylinder 363 and the detection seat 331 to rotate through the gear 369. When the detection seat 331 rotates, it can rotate the installation groove 332 to the side surface of the air inlet hole 334. At this time, gas can enter the installation groove 332. After the gas enters the installation groove 332, the gas detection module 333 can detect the gas concentration. The gas detection result will be sent to the controller 400, and the controller 400 will analyze the gas detection data;

[0078] S5: When the controller 400 detects that the gas concentration exceeds the standard, it sends a work instruction to the second telescopic rod 371 and the first telescopic rod 367. The second telescopic rod 371 can open the exhaust hole 352 through the cooperation of parts. The first telescopic rod 367 can drive the gear 369 to move to the side surface of the gear ring 366 at the end of the second rotating cylinder 364 to engage and connect. At this time, the driving motor 368 can drive the second rotating cylinder 364 to rotate through the gear 369. When the second rotating cylinder 364 rotates, it can drive the support seat 351 and the exhaust electromagnetic valve 353 to rotate. When the exhaust electromagnetic valve 353 rotates to the side surface of the exhaust hole 352, the exhaust electromagnetic valve 353 is opened. The gas can be transported into the exhaust passage 354 through the exhaust electromagnetic valve 353 and discharged by the air pump, thereby reducing the gas concentration in the drill hole.

[0079] S6: When the gas detection module 333 detects that the gas concentration is lower than the specified value, the controller 400 sends a work instruction to the gas measuring mechanism 300, so that the gas measuring mechanism 300 returns to the initial state. When the gas measuring mechanism 300 returns to the initial state, the drill bit 100 will continue to drill downward.

[0080] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes within the technical range disclosed by the present application according to the technical solution and the inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A coal mine underground measurement-while-drilling directional drilling system, comprising: A drill bit, wherein a drill rod is mounted on the drill bit, a gas measuring mechanism that moves with the drill is mounted on the lower part of the drill rod, and a controller is mounted on the top of the drill rod via an electric wire, wherein the gas measuring mechanism comprises an installation pipe, a connecting pipe, a detection component, a sealing component, an exhaust component, a drive component, and a sealing component; The lower part of the drill pipe is equipped with an installation pipe, and a connecting pipe is installed through the installation pipe and the inner axial center of the drill pipe. The lower middle and upper parts of the connecting pipe are respectively equipped with a detection component, an exhaust component and a sealing component. The detection assembly includes a detection seat, a gas detection module, and an air inlet. The lower part of the connecting pipe is fitted with the detection seat, and the detection seat is connected to the mounting pipe through a bearing. At least two gas detection modules are symmetrically arranged around the axis inside the detection seat. An air inlet is opened through the surface of the mounting pipe, which can deliver gas to the gas detection module for detection. The sealing assembly includes a mounting base and a sealing sleeve. Two mounting bases are installed on the upper part of the mounting tube, and the two mounting bases are connected to the sealing sleeve. A flexible sensor is provided inside the sealing sleeve. The flexible sensor can detect the collapsed part in the borehole. The sealing sleeve can be expanded by injecting gas through an air pump to seal the borehole. The sealing assembly also includes a slide rail, a multi-section telescopic rod, a compression ball, and a movable seat. The slide rail is provided between the mounting seats, and the movable seat is movably mounted on the slide rail. The movable seat can move vertically on the slide rail by a driving component. The multi-section telescopic rod is mounted on the movable seat, and the compression ball is mounted on the output end of the multi-section telescopic rod. The drive assembly includes a connecting cylinder and a support rod. The connecting cylinder is sleeved on the outer surface of the connecting tube. The two ends of the connecting cylinder are rotatably connected to the top of the detection seat and the bottom of the support seat, respectively. At least three support rods are fixedly installed on the outer surface of the connecting cylinder in a ring array. The other end of the support rod is fixedly installed on the inner wall of the mounting tube. The drive assembly further includes a first rotating cylinder, a second rotating cylinder, and a third rotating cylinder. The first rotating cylinder is fixedly installed at the axial center of the top of the detection seat. The third rotating cylinder is rotatably installed through the axial centers of the two mounting seats. A slide rail is installed on the outer surface of the third rotating cylinder. The inner side of the third rotating cylinder is sleeved on the side of the connecting pipe. The second rotating cylinder is sleeved on the outer surface of the third rotating cylinder. The outer surface of the second rotating cylinder is connected to the axial center of the support seat. A channel for an exhaust solenoid valve and an exhaust passage is opened through the outer surfaces of the second rotating cylinder and the third rotating cylinder. The drive assembly also includes a gear ring, a first telescopic rod, a drive motor, and a gear. Gear rings are installed at the top of the first rotating cylinder and at the bottom of the second and third rotating cylinders. A first telescopic rod is installed on the inner side of the connecting cylinder. A drive motor is installed at the output end of the first telescopic rod. A gear that cooperates with the gear ring is installed at the output end of the drive motor. The exhaust assembly includes a support base, an exhaust port, an exhaust solenoid valve, and an exhaust channel. The support base is sleeved in the middle of the connecting pipe. The support base and the mounting pipe are connected by a bearing. An exhaust port is opened through the outer surface of the mounting pipe near the support base. An exhaust solenoid valve is installed inside the support base. An exhaust channel is opened inside the connecting pipe, which communicates with the exhaust solenoid valve and the gas detection module. The top of the exhaust channel is connected to an air pump.

2. The directional drilling system for underground measurement while drilling in coal mines according to claim 1, characterized in that: The detection assembly also includes a mounting slot. The outer surface of the detection base is symmetrically provided with mounting slots for installing a gas detection module. The mounting slots are connected to a connecting pipe.

3. The directional drilling system for underground measurement while drilling in coal mines according to claim 1, characterized in that: The sealing assembly includes a second telescopic rod, a wedge, a movable block, an inclined groove, and a sealing column. The outer surfaces of the detection seat and the support seat are both fixedly mounted with the second telescopic rod through the assembly groove. The output end of the second telescopic rod is fixedly mounted with a wedge facing upward. The top of the assembly groove is movably connected to the movable block. The bottom of the movable block has an inclined groove that slides with the wedge. The side of the movable block is fixedly mounted with a sealing column that matches the air inlet and exhaust port.

4. A method for directional drilling with measurement while drilling in coal mines, characterized in that, The coal mine underground measurement-while-drilling directional drilling system according to claim 3 includes the following steps: S1: When the drill bit reaches the designated position, the sealing assembly works by injecting gas into the cavity between the sealing sleeve and the third rotating cylinder through the air pump. After the gas is injected, the sealing sleeve expands and fits and seals the drill hole. S2: The flexible sensor on the sealing sleeve will also fit with the borehole. The flexible sensor will send the fitting result to the controller. The controller will analyze the fitting data. When the controller detects a large collapse on the inner wall of the borehole, it will send a working command to the first telescopic rod. If no collapse is detected on the inner wall of the borehole, no command will be sent to the first telescopic rod. When the first telescopic rod works, it will drive the drive motor and gear to move vertically. When the gear moves to the side of the toothed ring at the end of the third rotating cylinder, it can mesh with the toothed ring. At this time, the drive motor works and can drive the toothed ring and the third rotating cylinder to rotate through the gear. When the third rotating cylinder rotates, it will rotate the extrusion ball to the same vertical plane as the borehole collapse. At this time, the moving seat can move vertically along the slide rail via the drive component. The vertical movement of the moving seat will drive the multi-section telescopic rod and the extrusion ball to move to the corresponding position of the borehole collapse. The operation of the multi-section telescopic rod can enable the extrusion ball to move horizontally. The horizontal movement of the extrusion ball can squeeze the sealing sleeve into the interior of the borehole collapse for sealing.

5. The method for directional drilling with measurement while drilling in coal mines according to claim 4, characterized in that, Includes the following steps: S3: After the borehole is sealed, the controller sends a working command to the second telescopic rod and the first telescopic rod. When the second telescopic rod is working, it can push the wedge to move vertically. When the wedge moves vertically, it can drive the moving block and the sealing column to move horizontally through the cooperation of its own inclined surface and the inclined groove. When the sealing column moves horizontally, it will open the air inlet. At the same time, when the first telescopic rod is working, it can move the gear to the side of the gear ring at the top of the first rotating cylinder for meshing connection. S4: When the air inlet is open and the gear moves to the designated position, the drive motor works and drives the first rotating cylinder and the detection seat to rotate through the gear. When the detection seat rotates, it can rotate the mounting slot to the side of the air inlet. At this time, gas can enter the mounting slot. After the gas enters the mounting slot, the gas detection module can detect the gas concentration. The gas detection result will be sent to the controller, and the controller will analyze the gas detection data.

6. The method for directional drilling with measurement while drilling in coal mines according to claim 5, characterized in that, Includes the following steps: S5: When the controller detects that the gas concentration exceeds the standard, it will send a working command to the second telescopic rod and the first telescopic rod. The second telescopic rod can open the exhaust port through the cooperation of the parts. The first telescopic rod can drive the gear to move to the side of the gear ring at the end of the second rotating cylinder for meshing. At this time, the drive motor can drive the second rotating cylinder to rotate through the gear. When the second rotating cylinder rotates, it can drive the support base and the exhaust solenoid valve to rotate. When the exhaust solenoid valve rotates to the side of the exhaust port, the exhaust solenoid valve opens. The gas can be transported to the exhaust channel through the exhaust solenoid valve and discharged by the air pump, thereby reducing the gas concentration in the borehole. S6: When the gas detection module detects that the gas concentration is lower than the specified value, the controller will send a working instruction to the gas measuring mechanism to restore the gas measuring mechanism to the initial state. When the gas measuring mechanism is restored to the initial state, the drill bit will continue to drill downward.

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