Energy-saving drilling device and method for coal mine water prevention and control
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUATING COAL GRP CO LTD
- Filing Date
- 2026-06-15
- Publication Date
- 2026-08-07
AI Technical Summary
[0003]在对不稳定地层进行钻井时，钻出的井会有坍塌风险，若井壁坍塌后，钻井便无法正常使用，需要重新进行钻井，重复作业导致工作时间和能源消耗增加，现有的解决方式为在钻井完成后下入套管，从而对井壁进行支撑，但此种方式的作业时间长，并且在下入套管的过程中亦会发生坍塌的情况，这时仍需要重新进行钻井，严重影响工作效率
本发明通过在进行钻井的同时，使支撑管随钻头一同进入钻井中，并利用支撑管对孔壁进行支撑，从而防止钻井坍塌，保证钻井的正常使用。
Smart Images
Figure CN122522981A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of energy-saving mining drilling equipment technology, specifically to an energy-saving drilling device and method for water control in coal mines. Background Technology
[0002] Energy-saving drilling tools refer to a class of drilling tools and equipment that significantly reduce energy consumption, water use, or improve operational efficiency while ensuring drilling performance through innovative structural design, drive methods, or process flows. Based on different energy-saving principles and application scenarios, current energy-saving drilling tools mainly include the following categories: bottom-hole power drive, where the drill pipe does not rotate and only the drill bit rotates, greatly reducing friction and energy loss; water recycling systems, which perform solid-liquid separation and deep purification of drilling wastewater to achieve closed-loop utilization of water resources; and direct electric power replacement, which uses electric motors to directly drive diesel engines, improving energy efficiency from the source and achieving zero emissions.
[0003] When drilling in unstable formations, there is a risk of well collapse. If the well wall collapses, the well cannot be used normally and drilling needs to be restarted. Repeated work increases working time and energy consumption. The existing solution is to run casing after drilling to support the well wall. However, this method takes a long time and collapses can also occur during the casing running process, requiring drilling to be restarted again, which seriously affects work efficiency. Summary of the Invention
[0004] The purpose of this invention is to provide an energy-saving drilling device and method for water control in coal mines, aiming to overcome or partially overcome the problems mentioned in the background art.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An energy-saving drilling device for water control in coal mines includes a frame with a feed device and an output shaft. It also includes a fixed frame fixed to the feed device. A drill rod is threadedly connected to the output shaft. A rotating ring is rotatably connected to the fixed frame. A support pipe is provided on one side of the rotating ring to support the well wall. A drill bit is provided on the drill rod. The support pipe has circumferentially spaced connectors. The rotating ring has circumferentially spaced connecting holes. Connectors are inserted into corresponding connecting holes to limit the rotation ring's position. The support pipe has circumferentially spaced connecting grooves. The number of connecting holes, connecting grooves, and connectors is equal.
[0006] Furthermore, the support tube includes first connecting plates that are circumferentially spaced at equal intervals. The number of first connecting plates is equal to the number of connecting members. The first connecting plates are fixed to the corresponding connecting members. The connecting groove is located on the corresponding first connecting plate. Second connecting plates and third connecting plates are respectively hinged to both sides of the first connecting plates. The second connecting plate is hinged to the adjacent third connecting plate.
[0007] Furthermore, a baffle is fixedly connected to the connecting groove, and the baffle is used to ensure the connection between the connector and the connecting groove.
[0008] Furthermore, the drill bit includes a connector, which is threaded to the drill rod. The connector is slidably connected to a sliding head, which is provided with an eccentric drill element. A tension spring is provided between the sliding head and the connector, and the sliding head is provided with a water outlet.
[0009] Furthermore, the drilling area of the eccentric drill bit during operation is greater than the coverage area of the support pipe.
[0010] Furthermore, the second connecting plate and the third connecting plate are both fixedly connected to a first limiting member on the side near the adjacent first connecting plate, and the first limiting member is pressed against the adjacent first connecting plate.
[0011] Furthermore, the first connecting plate is slidably connected to a second limiting member, and the third connecting plate is provided with a limiting groove. The second limiting member is inserted into the adjacent limiting groove to limit the third connecting plate.
[0012] Furthermore, the first connecting plate is slidably connected to a sliding member, the sliding member is slidably connected to an adjacent second limiting member, the sliding member is hinged to a support rod, the support rod is used to support the drill rod, and a torsion spring is provided between the support rod and the adjacent sliding member.
[0013] Furthermore, the support rod is fixedly connected to a third limiting member, which presses against the sliding member.
[0014] A method for drilling to control water in coal mines, using the aforementioned energy-saving drilling device for water control in coal mines, the method comprising the following steps: S1. Place this device and put the drill rod and support tube together, then insert the connector into the connecting hole and lock the rotating ring to complete the connection. Connect the drill rod to the output shaft and the connector respectively. S2. Start the feed device. The output shaft of the feed device drives the drill bit to rotate and move through the drill rod, so that the drill bit can drill. At the same time, the fixed frame rotates together with the ring to drive the support pipe to move, so that the support pipe enters the well drilled by the drill bit. S3. During the drilling process, water enters the sliding head. The water pressure pushes the sliding head to move and stretches the tension spring. Then, the water in the sliding head is discharged from the water outlet. The sliding head returns to its original position under the action of the tension spring. The above process is repeated, causing the sliding head to drive the eccentric drill bit to vibrate back and forth. S4. When the feed device can no longer move, stop moving, then release the limiting of the rotating ring by the connecting part, then separate the output shaft from the drill pipe, then move the feed device back to its original position, and install a new drill pipe and support pipe, and then continue drilling. S5. After drilling is completed, it can be decided whether to remove the support pipe as needed. If the support pipe is not removed, rotate the rotating ring to release the limit of the connecting part adjacent to the feed device. Then the feed device will move the drill pipe and drill bit out of the well. When removing the support pipe, do not release the limit of the connecting part, so that the feed device will pull the support pipe out together. S6. When removing the support tube left inside, push the support rod adjacent to the feeding device to separate the second limiting member of the support rod transmission from the limiting groove; S7. Once all the second limiting components have separated from the limiting groove, the support pipe can be retracted and removed from the well. Then, the support pipe is opened up, and the second limiting components are reinserted into the limiting groove, ready for the next use.
[0015] Compared with the prior art, the energy-saving drilling device and method for water control in coal mines of the present invention have achieved the following significant technical effects: This invention prevents well collapse and ensures normal drilling operations by inserting a support pipe into the well along with the drill bit during drilling and using the support pipe to support the borehole wall.
[0016] The eccentric drill bit vibrates by driving the sliding head, thereby improving the efficiency of the eccentric drill bit during drilling, increasing the drilling speed, and expanding the drilling diameter by using the eccentric drill bit so that the drilling diameter can accommodate the support pipe.
[0017] By making the support pipe consist of several first connecting plates, second connecting plates and third connecting plates, when the support pipe is difficult to remove from the well, the second connecting plates and third connecting plates can be rotated to retract the support pipe so that it can be removed from the well. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the output shaft and drill rod of the present invention; Figure 3 This is a three-dimensional structural diagram of the rotating ring and connecting hole of the present invention; Figure 4 This is an exploded view of the drill pipe and connector of the present invention; Figure 5 This is a three-dimensional structural diagram of the sliding element and support rod of the present invention; Figure 6 This is a schematic diagram of the planar structure of the support tube of the present invention when it is open; Figure 7 This is a schematic diagram of the planar structure of the support tube of the present invention when it is retracted; Figure 8 for Figure 5 Enlarged view of point A in the middle; In the picture, 1: Frame, 2: Feeding device, 201: Output shaft, 3: Fixed frame, 301: Rotating ring, 302: Connecting hole, 4: Drill rod, 5: Support pipe, 501: First connecting plate, 5011: Connecting groove, 5012: Baffle, 502: Second connecting plate, 503: Third connecting plate, 5031: Limiting groove, 6: Drill bit, 601: Connecting head, 602: Sliding head, 6021: Water outlet, 603: Eccentric drill piece, 604: Tension spring, 7: Connecting piece, 8: First limiting piece, 9: Second limiting piece, 10: Sliding piece, 11: Support rod, 12: Torsion spring, 13: Third limiting piece. Detailed Implementation
[0019] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. Certain embodiments of the invention will be described more fully below with reference to the accompanying drawings, and some, but not all, of these embodiments will be shown. In fact, various embodiments of the invention can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to enable the invention to meet applicable legal requirements.
[0020] In the description of this invention, it should be noted that the terms "inner," "outer," "upper," "lower," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for 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, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] Example 1: An energy-saving drilling device for water control in coal mines, please refer to... Figures 1-5The system includes a frame 1, which is equipped with a feed device 2. Both the frame 1 and the feed device 2 are existing devices. The frame 1 can adjust the drilling angle. The feed device 2 can drive the drill rod 4 and the drill bit 6 to rotate and move. It can also supply water to the drill rod 4 and the drill bit 6 to flush out the debris in the well and cool the drill bit 6. The movement of the feed device 2 and the rotation of the output shaft 201 are powered by an electric motor, which has lower energy consumption than a diesel engine. The feed device 2 is equipped with an output shaft 201, which is hollow and connected to a water supply device to supply water to the drill rod 4 and the drill bit 6. A fixed frame 3 is fixedly connected to the left side of the feed device 2. The drill rod 4 is threadedly connected to the left side of the output shaft 201. A rotating ring 301 is rotatably connected to the fixed frame 3. A support pipe 5 is provided on the left side of the rotating ring 301 to support the well wall. The drill rod 4 is equipped with the drill bit 6 and the support... Three L-shaped connectors 7 are circumferentially spaced on the right side of the pipe 5. The rotating ring 301 has three circumferentially spaced connecting holes 302. The connectors 7 are inserted into the corresponding connecting holes 302 to limit the rotation ring 301, thereby achieving the connection between the support pipe 5 and the rotating ring 301. In this way, when the feed device 2 pushes the drill bit 6 to drill, the support pipe 5 can enter the well together to provide support for the well wall and prevent it from collapsing. Three L-shaped connecting grooves 5011 are circumferentially spaced on the left side of the support pipe 5. The connecting grooves 5011 limit each other with the connectors 7 on the other support pipe 5. The maximum width of the connector 7 is equal to the minimum width of the connecting groove 5011, thereby completing the connection between the two support pipes 5. The number of connecting holes 302, connecting grooves 5011 and connectors 7 are all equal.
[0022] When using this device for drilling operations, first place the device at the work site, then put the drill pipe 4 and the support pipe 5 together, then insert the connector 7 into the corresponding connection hole 302, and rotate the support pipe 5 so that the connector 7 locks the rotating ring 301 to complete the connection. Then align the drill bit 6 with the drilling direction, and then start the feed device 2. The output shaft 201 of the feed device 2 drives the drill pipe 4 to rotate, and the drill pipe 4 drives the drill bit 6 to rotate. At the same time, the feed device 2 moves to the left, and the drill bit 6 moves through the drill pipe 4 to drill. At the same time, the feed device 2 drives the fixed frame 3 to move, the fixed frame 3 drives the rotating ring 301 to move, and the rotating ring 301 drives the support pipe 5 to move, so that the support pipe 5 enters the well drilled by the drill bit 6, thereby supporting the well wall.
[0023] When the feed device 2 moves to the left side of the frame 1, it stops working. Then, rotate the rotating ring 301 to release the limiting position of the connecting piece 7 on the rotating ring 301. After that, separate the output shaft 201 from the drill rod 4. After separation, move the feed device 2 to the right side, and then take a new drill rod 4 and a support tube 5. First, connect the two drill rods 4, and then connect the two support tubes 5. The two drill rods 4 are connected by threads. When connecting the two support tubes 5, align the connecting groove 5011 on the new support tube 5 with the connecting piece 7 on the old support tube 5. Then, insert the connecting piece 7 into the connecting groove 5011 and rotate it to complete the connection of the two support tubes 5. After connecting, connect the new drill rod 4 and support pipe 5 to the output shaft 201 and rotating ring 301 respectively, and then continue drilling. After drilling is completed, rotate the rotating ring 301 to release the limit of the rightmost connecting piece 7. Then the feed device 2 moves to the right to remove the drill rod 4 and drill bit 6 from the well. Then turn off the feed device 2. At this time, you can decide whether to remove the support pipe 5 as needed. When the support pipe 5 is not removed, the support pipe 5 can continuously provide support for the well wall. When removing the support pipe 5, simply do not release the limit of the connecting piece 7 when the feed device 2 moves to the right, and pull out the support pipe 5 at the same time.
[0024] Example 2: Based on Example 1, please refer to Figures 3-7 The support pipe 5 includes three circumferentially spaced first connecting plates 501, the number of which is equal to the number of connecting pieces 7. Each first connecting plate 501 is fixed to its corresponding connecting piece 7. A connecting groove 5011 is located on the left side of the corresponding first connecting plate 501. A second connecting plate 502 and a third connecting plate 503 are hinged to both sides of each first connecting plate 501. The second connecting plate 502 is hinged to the adjacent third connecting plate 503. By folding the second connecting plate 502 and the third connecting plate 503 inwards, the coverage area of the support pipe 5 can be reduced, facilitating its removal from the well. A baffle 5012 is fixed to the connecting groove 5011, ensuring the connection between the connecting piece 7 and the connecting groove 5011 and preventing the connecting piece 7 from detaching from the connecting groove 5011.
[0025] Please refer to Figure 4The drill bit 6 includes a connector 601, which is threaded to the left side of the drill rod 4. A sliding head 602 is slidably connected to the left side of the connector 601. An eccentric drill element 603 is located on the left side of the sliding head 602. The eccentric drill element 603 is an existing device that can increase the drilling diameter by rotation. A tension spring 604 is provided between the sliding head 602 and the connector 601. When the water inside the sliding head 602 increases, it pushes the sliding head 602 to move. After the water is discharged, it is pulled back to its original position by the tension spring 604, thereby realizing the vibration of the sliding head 602. The sliding head 602 is provided with a water outlet 6021, which is used to allow water to flow out and flush away the gravel. The drilling area of the eccentric drill element 603 when it is working is larger than the coverage area of the support pipe 5.
[0026] Please refer to Figure 6 and Figure 7 The second connecting plate 502 and the third connecting plate 503 are both fixedly connected to the side of the adjacent first connecting plate 501. The first limiting member 8 is pressed against the adjacent first connecting plate 501, thereby limiting the angle between the second connecting plate 502 and the third connecting plate 503.
[0027] Please refer to Figures 5-7 The first connecting plate 501 is slidably connected to the second limiting member 9, and the third connecting plate 503 is provided with a limiting groove 5031. The second limiting member 9 is inserted into the adjacent limiting groove 5031 to limit the third connecting plate 503, so that the support pipe 5 can support the well wall. When the second limiting member 9 is separated from the limiting groove 5031, the limiting of the third connecting plate 503 is released, and the support pipe 5 can be retracted so that the support pipe 5 can be taken out from the well.
[0028] Please refer to Figures 5-7 The first connecting plate 501 is slidably connected to a sliding member 10. The length of the sliding member 10 is equal to the length of the support tube 5. After the two support tubes 5 are connected, the two sliding members 10 are in contact with each other. The sliding member 10 is slidably connected to the adjacent second limiting member 9. The sliding member 10 is hinged to a support rod 11, which is used to support the drill rod 4. When multiple drill rods 4 are connected, the middle part is prone to swinging during rotation. The support rod 11 can support the drill rod 4, reduce the swing of the drill rod 4, and ensure drilling efficiency. A torsion spring 12 is provided between the support rod 11 and the adjacent sliding member 10. When drilling is completed and the drill rod 4 is pulled to the right, it moves relative to the support rod 11, and the drill bit 6 will drive the support rod 11 to rotate and cause the torsion spring 12 to store force. After the drill bit 6 separates from the support rod 11, the torsion spring 12 can reset the support rod 11. The support rod 11 is provided with ball bearings to reduce friction when the drill rod 4 rotates.
[0029] Please refer to Figure 5 and Figure 8The support rod 11 is fixedly connected to a third limiting member 13, which presses against the sliding member 10. The third limiting member 13 restricts the rotation direction of the support rod 11. When the support tube 5 needs to be removed, the right support rod 11 can be pushed to move, thereby retracting the support tube 5, which can then be removed. The connecting member 7 is located on the side of the first connecting plate 501 closer to the feeding device 2, and the connecting groove 5011 is located on the side of the first connecting plate 501 away from the feeding device 2. When the right support rod 11 moves, it drives the adjacent sliding member 10 to move, and the sliding member 10 pushes the other sliding members 10 to move synchronously, causing all the support tubes 5 to retract at the same time, thus facilitating drilling and removal from the support tube 5.
[0030] Before using this device, connect the drill rod 4 to the output shaft 201 and the connector 601 respectively. During drilling, the drill rod 4 drives the connector 601 to rotate, which in turn drives the sliding head 602 to rotate. The sliding head 602 then drives the eccentric drill bit 603 to rotate. When the eccentric drill bit 603 rotates clockwise, it swings out, increasing the drilling radius and making the cross-sectional area of the drilled well larger than the coverage area of the support pipe 5, facilitating the entry of the support pipe 5 into the well. Simultaneously, water from the output shaft 201 flows through the drill rod 4 into the connector 601 and then into the sliding head 602. The increased pressure within the sliding head 602 pushes... The sliding head 602 moves to the left relative to the connecting head 601, stretching the tension spring 604. When the sliding head 602 moves to the point where the water outlet 6021 passes the left side of the connecting head 601, the water in the sliding head 602 is discharged from the water outlet 6021, reducing the pressure inside the sliding head 602. Under the action of the tension spring 604, the sliding head 602 moves to the right relative to the connecting head 601, closing the water outlet 6021. Then, the opening process is repeated. The above process is repeated, causing the sliding head 602 to drive the eccentric drill 603 to vibrate back and forth, enhancing the drilling effect of the eccentric drill 603.
[0031] After drilling is completed, the output shaft 201 drives the eccentric drill 603 to rotate, causing the eccentric drill 603 to retract. Then, the feed device 2 drives the eccentric drill 603 to move to the right, disengaging it from the well. If the well wall collapses, causing excessive pressure on the support pipe 5, making it difficult to remove, the rightmost support rod 11 can be pushed to move it to the left. The support rod 11 drives the adjacent sliding member 10 to move, and the sliding member 10 drives the other sliding members 10 to move. All the sliding members 10 press the second limiting member 9 to move, causing the second limiting member 9 to separate from the limiting groove 5031. After all the second limiting members 9 are separated from the limiting groove 5031, the support pipe 5 can be retracted, making it easier to remove the support pipe 5 from the well. Then, the support pipe 5 is opened up, and the second limiting member 9 is reinserted into the limiting groove 5031, ready for the next use.
[0032] Example 3: A method for preventing water drilling in coal mines, based on Example 2, such as... Figures 1-8 As shown, the method using the above-mentioned energy-saving drilling device for coal mine water control includes the following steps: S1. Place this device and put the drill rod 4 and the support tube 5 together. Then insert the connector 7 into the connection hole 302 and lock the rotating ring 301 to complete the connection. The drill rod 4 is connected to the output shaft 201 and the connector 601 respectively. S2. Start the feed device 2. The output shaft 201 of the feed device 2 drives the drill bit 6 to rotate and move through the drill rod 4, so that the drill bit 6 can drill. At the same time, the fixed frame 3 rotates the ring 301 together to drive the support pipe 5 to move, so that the support pipe 5 enters the well drilled by the drill bit 6. S3. During the drilling process, water enters the sliding head 602. The water pressure pushes the sliding head 602 to move and stretches the tension spring 604. Then, the water in the sliding head 602 is discharged from the water outlet 6021. The sliding head 602 returns to its original position under the action of the tension spring 604. The above process is repeated, causing the sliding head 602 to drive the eccentric drill 603 to vibrate back and forth. S4. When the feed device 2 can no longer move, stop moving, then release the limit of the connecting piece 7 on the rotating ring 301, then separate the output shaft 201 from the drill pipe 4, then the feed device 2 moves back to its original position, and installs a new drill pipe 4 and support pipe 5, and then can continue to drill deeper. S5. After drilling is completed, it can be decided whether to remove the support pipe 5 as needed. If the support pipe 5 is not removed, rotate the rotating ring 301 to release the limit of the connecting piece 7 adjacent to the feed device 2. Then the feed device 2 will move the drill pipe 4 and drill bit 6 out of the well. When removing the support pipe 5, the limit of the connecting piece 7 is not released, so that the feed device 2 pulls the support pipe 5 out together. S6. When removing the support tube 5 left inside, push the support rod 11 adjacent to the feeding device 2 to separate the support rod 11 from the second limiting member 9 and the limiting groove 5031. S7. After all the second limiting members 9 have separated from the limiting groove 5031, the support pipe 5 can be retracted and taken out of the well. Then, the support pipe 5 is opened up and the second limiting members 9 are reinserted into the limiting groove 5031, and it can be waited for the next use.
[0033] The present invention has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the energy-saving drilling device and method for water control in coal mines of the present invention. Of course, the specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. An energy-saving drilling device for water control in coal mines, comprising a frame, wherein the frame is equipped with a feed device, and the feed device is equipped with an output shaft; characterized in that, It also includes a fixing frame, which is fixed to the feed device. The output shaft is threadedly connected to a drill rod. The fixing frame is rotatably connected to a rotating ring. A support tube is provided on one side of the rotating ring. The support tube is used to support the well wall. The drill rod is provided with a drill bit. The support tube is provided with circumferentially equally spaced connectors. The rotating ring is provided with circumferentially equally spaced connecting holes. The connectors are inserted into the corresponding connecting holes to limit the rotation ring. The support tube is provided with circumferentially equally spaced connecting grooves. The number of connecting holes, connecting grooves and connectors are all equal.
2. The energy-saving drilling device for water control in coal mines according to claim 1, characterized in that, The support tube includes first connecting plates that are evenly spaced around the circumference. The number of first connecting plates is equal to the number of connecting members. The first connecting plates are fixed to the corresponding connecting members. The connecting groove is located on the corresponding first connecting plate. Second connecting plates and third connecting plates are respectively hinged to both sides of the first connecting plates. The second connecting plate is hinged to the adjacent third connecting plate.
3. The energy-saving drilling device for water control in coal mines according to claim 2, characterized in that, A baffle is fixedly connected to the connecting groove, and the baffle is used to ensure the connection between the connector and the connecting groove.
4. The energy-saving drilling device for water control in coal mines according to claim 3, characterized in that, The drill bit includes a connector, which is threaded to the drill rod. The connector is slidably connected to a sliding head, which is provided with an eccentric drill element. A tension spring is provided between the sliding head and the connector, and the sliding head is provided with a water outlet.
5. The energy-saving drilling device for water control in coal mines according to claim 4, characterized in that, The drilling area of the eccentric drill bit is larger than the coverage area of the support pipe when it is working.
6. The energy-saving drilling device for water control in coal mines according to claim 5, characterized in that, Both the second connecting plate and the third connecting plate are fixedly connected to a first limiting member on the side near the adjacent first connecting plate, and the first limiting member is pressed against the adjacent first connecting plate.
7. An energy-saving drilling device for water control in coal mines according to claim 6, characterized in that, The first connecting plate is slidably connected to a second limiting member, and the third connecting plate is provided with a limiting groove. The second limiting member is inserted into the adjacent limiting groove to limit the third connecting plate.
8. An energy-saving drilling device for water control in coal mines according to claim 7, characterized in that, The first connecting plate is slidably connected to a sliding member, the sliding member is slidably connected to an adjacent second limiting member, the sliding member is hinged to a support rod, the support rod is used to support the drill rod, and a torsion spring is provided between the support rod and the adjacent sliding member.
9. An energy-saving drilling device for water control in coal mines according to claim 8, characterized in that, The support rod is fixedly connected to a third limiting member, and the third limiting member and the sliding member are pressed against each other.
10. A method for drilling to control water in coal mines, using the energy-saving drilling device for water control in coal mines as described in claim 9, characterized in that... The method includes the following steps: S1. Place this device and put the drill rod and support tube together, then insert the connector into the connecting hole and lock the rotating ring to complete the connection. Connect the drill rod to the output shaft and the connector respectively. S2. Start the feed device. The output shaft of the feed device drives the drill bit to rotate and move through the drill rod, so that the drill bit can drill. At the same time, the fixed frame rotates together with the ring to drive the support pipe to move, so that the support pipe enters the well drilled by the drill bit. S3. During the drilling process, water enters the sliding head. The water pressure pushes the sliding head to move and stretches the tension spring. Then, the water in the sliding head is discharged from the water outlet. The sliding head returns to its original position under the action of the tension spring. The above process is repeated, causing the sliding head to drive the eccentric drill bit to vibrate back and forth. S4. When the feed device can no longer move, stop moving, then release the limiting of the rotating ring by the connecting part, then separate the output shaft from the drill pipe, then move the feed device back to its original position, and install a new drill pipe and support pipe, and then continue drilling. S5. After drilling is completed, it can be decided whether to remove the support pipe as needed. If the support pipe is not removed, rotate the rotating ring to release the limit of the connecting part adjacent to the feed device. Then the feed device will move the drill pipe and drill bit out of the well. When removing the support pipe, do not release the limit of the connecting part, so that the feed device will pull the support pipe out together. S6. When removing the support tube left inside, push the support rod adjacent to the feeding device to separate the second limiting member of the support rod transmission from the limiting groove; S7. Once all the second limiting components have separated from the limiting groove, the support pipe can be retracted and removed from the well. Then, the support pipe is opened up, and the second limiting components are reinserted into the limiting groove, ready for the next use.