Drill monitoring bit and method of installation thereof

Abstract

The present invention discloses a drilling monitoring drill bit, comprising: a drill bit body, which includes a drill bit and a hollow long rod, one end of the hollow long rod is connected to the drill bit and the other end is provided with an external thread connected to the drill rod, the inner cavity of the hollow long rod is connected to the water flow channel in the drill bit; a monitoring component, which is arranged in the drill bit body, and includes a monitoring tube body for monitoring and a pair of end caps sealed with both ends of the monitoring tube body; wherein the outer wall of the monitoring tube body is provided with multiple groups of male threads forming an annular structure, the inner wall of the hollow long rod is provided with multiple groups of female threads matching the multiple groups of male threads, along the extension direction of the hollow long rod toward the drill bit, the outer diameter gradient of the annular structure formed by the male threads decreases, and the thread length of the male threads is the same. The present invention can not only accurately control the characteristics of underground rock formations and provide rich and accurate data, thereby improving monitoring efficiency, but also can be quickly put into place, is easy to install, and exhibits good adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mining strata geological monitoring instruments. More specifically, the present application relates to a drilling monitoring drill bit and a method for installing the same. BACKGROUND

[0002] In the field of modern mining engineering, the strata geological foundation conditions are like a cornerstone, firmly controlling the safety of the mining operation. Mining operation involves large-scale underground rock mass excavation and resource extraction, and the complex and variable strata conditions conceal a series of high-risk hidden dangers such as collapse, water inrush, gas leakage, etc. From the engineering preparation to the whole mining process, accurate control of the strata geological foundation conditions and accurate acquisition of the relevant lithology physical and mechanical parameters of the underground strata are the key to the safety of mining work.

[0003] Traditional measurement methods, such as ground geological survey, aerial geological survey, drilling core measurement, etc., not only have a long process and low efficiency, but also have poor measurement accuracy, which cannot meet the strict requirements of current efficient and accurate mining. The monitoring equipment used in traditional measurement methods has a large volume and is bulky. In the narrow roadway of the coal mine, first of all, if there is any carelessness, the collision between the large monitoring equipment and the roadway wall may cause damage to the internal precision components. Secondly, the installation of the large monitoring equipment to the specified drilling position requires the use of large auxiliary lifting equipment, which greatly increases the difficulty coefficient of construction. Finally, the existing monitoring equipment has a long debugging time, which seriously affects the work efficiency.

[0004] Another problem faced by the existing monitoring equipment is high cost. The cost of monitoring equipment integrated with high-precision and complex functions is high. Many small mining enterprises are unable to update equipment due to limited funds, which affects the improvement of advanced monitoring technology. At the same time, the operation and maintenance cost of large and complex monitoring equipment is also a bottomless pit. Once the equipment is running, the replacement frequency of the vulnerable parts is high, the maintenance cost is high, and the regular calibration and maintenance cost is also very objective, which weakens the motivation of enterprises to improve technical equipment.

[0005] The poor adaptability and adjustability of large monitoring equipment is also a major defect. Most of the existing monitoring equipment is designed and manufactured based on fixed specifications and preset scenarios. In the face of complex and variable geological environment and mining layout in the mine, the adaptability and adjustability are poor. For example, in some irregular drilling sites or areas where the monitoring position needs to be frequently changed, the existing detection equipment is difficult to quickly position, which causes the key detection data to be unable to be obtained in time, delays the optimization and adjustment of the subsequent mining plan, and seriously limits the improvement of the overall efficiency of the mining industry.

[0006] In summary, it is urgent to update the existing monitoring equipment. SUMMARY

[0007] An object of the present application is to solve at least the above problems and provide at least the advantages to be described later.

[0008] Another object of the present application is to provide a drilling monitoring drill bit which not only can accurately control the characteristics of underground rock strata to provide rich and accurate data and improve monitoring efficiency, but also can be quickly positioned and installed conveniently, and has good adaptability.

[0009] To achieve these objects and other advantages according to the present application, a drilling monitoring drill bit is provided, comprising:

[0010] A drill bit body comprising a drill bit and a hollow long rod, one end of the hollow long rod being connected to the drill bit and the other end being provided with an external thread connected to a drill rod, and an inner cavity of the hollow long rod being in communication with a water flow passage in the drill bit;

[0011] A monitoring assembly arranged in the drill bit body, comprising a monitoring pipe body for monitoring and a pair of end covers sealingly connected to both ends of the monitoring pipe body;

[0012] The outer side wall of the monitoring pipe body is provided with a plurality of male thread fastenings forming an annular structure, the inner wall of the hollow long rod is provided with a plurality of female thread fastenings matched with the plurality of male thread fastenings, the outer diameter of the annular structure formed by the male thread fastenings decreases in the extension direction of the hollow long rod towards the drill bit, and the thread length of the male thread fastenings is the same.

[0013] Preferably, one end of the monitoring pipe body is provided with a communication interface, the communication interface is arranged close to the drill bit, and the monitoring pipe body is provided with independent power supply compartments, monitoring compartments and control compartments for respectively installing lithium batteries, sensor groups and control boards, the communication interface, the lithium batteries and the sensor groups are electrically connected to the control board.

[0014] Preferably, the sensor group comprises a three-axis vibration acceleration sensor, a temperature sensor and an angular velocity sensor.

[0015] Preferably, an aviation plug extending outwardly is arranged on the control board, and an aviation socket corresponding to the aviation plug is arranged on the monitoring compartment.

[0016] Preferably, the monitoring pipe body comprises a monitoring inner pipe and a monitoring outer pipe sleeved together, any end portion of the monitoring inner pipe is telescopic to the corresponding end portion of the monitoring outer pipe, one end of the monitoring inner pipe is provided with the communication interface, the other end of the monitoring inner pipe is closed, the two end portions of the monitoring inner pipe are provided with external threads matched with the internal threads of the end covers, the connection part of the monitoring outer pipe and the end cover is provided with the same diameter, and an O-ring is arranged between the end portion of the monitoring outer pipe and the end cover.

[0017] Preferably, the monitoring inner tube is provided with a through hole for the temperature sensor sensing section to pass through, the monitoring outer tube is provided with an inner groove opposite to the through hole, and the monitoring outer tube is provided with a pair of grooves connected to the inner groove to form a water passage.

[0018] Preferably, the end cap provided at the closed end of the monitoring inner tube is provided with a connecting part, and the connecting part comprises:

[0019] A connecting sleeve, which comprises a connecting inner tube sleeved on the end cap and a connecting outer tube connected to the connecting inner tube through a reinforcing rib;

[0020] An operating ring, which is arranged away from the connecting sleeve, and a plurality of supporting rods are arranged between the operating ring and the connecting inner tube;

[0021] Preferably, the connecting outer tube is provided with a male thread matched with a female thread on the inner wall of the hollow long rod, the outer diameter of the annular structure formed by a group of male threads on the connecting outer tube is greater than the outer diameter of the annular structure formed by an adjacent group of male threads, and the length of the threads of the male threads on the connecting outer tube is the same as the length of the threads of the male threads on the monitoring outer tube.

[0022] Preferably, the monitoring outer tube and the monitoring inner tube are both non-magnetic pressure-bearing steel pipes.

[0023] Preferably, the drill bit body is cut and broken by PDC polycrystalline diamond compacts.

[0024] The present application further claims protection of a method for installing the drilling monitoring drill bit, and the drill bit body and the monitoring assembly are connected through threads.

[0025] The present application at least has the following beneficial effects:

[0026] One, the drilling monitoring drill bit provided by the present application comprises a drill bit body and a monitoring assembly, the monitoring assembly is integrally arranged in the drill bit body, the defects of large volume and complex installation of the traditional monitoring equipment are overcome, the assembly process of the specified drilling position is no longer dependent on large auxiliary hoisting equipment, the portability and installation convenience of the drilling monitoring equipment are greatly improved, the monitoring assembly is arranged in the drill bit body through a thread structure, the drilling monitoring equipment can be quickly positioned for monitoring and timely feedback of address information, the drilling operation can be adjusted in real time according to the data, the waste of the project caused by information lag is reduced, and the efficient promotion of the mining operation is effectively ensured; the drill bit and the drilling monitoring equipment are combined in the present application, the built-in monitoring means can monitor the drill bit wear and temperature state in real time, once the drill bit is found to be excessively worn or the temperature is too high, rapid warning can be performed, the operator can replace or adjust the drill bit in time, sudden damage of the drill bit is avoided, long-time shutdown maintenance is avoided, the drilling operation continuity is maintained, and the overall efficiency is improved; the monitoring assembly is closely connected with the drill bit, and the wear degree of the drill bit cutting edge can be accurately tracked; according to the wear rate, the operator dynamically controls the drilling pressure, wear is avoided due to excessively large drilling pressure, drilling efficiency is prevented from being affected due to excessively small drilling pressure, the durability of the drill bit is scientifically prolonged, and the cost and time for frequent replacement of the drill bit are saved.

[0027] Secondly, the drilling monitoring drill bit provided by the present application is provided with a communication interface at one end of a monitoring pipe body and close to a drill bit end, is matched with independent power supply bins, monitoring bins and control bins, and guarantees the timeliness of data transmission and the stability of equipment operation, so that the measurement-while-drilling technology can smoothly provide real-time geological information, the resistance drilling operation is accurately optimized, the construction time can be significantly shortened, the drilling efficiency is improved, and meanwhile, the stable operation environment is helpful for long-term stable monitoring and timely capture of the drill bit state, laying a foundation for subsequent optimization of the drill bit performance and prolongation of the drill bit service life.

[0028] Thirdly, the drilling monitoring drill bit provided by the present application is provided with a sensor group of a three-axis vibration acceleration sensor, a temperature sensor and an angular velocity sensor, and has strong multidimensional data acquisition capability. On one hand, the vibration, temperature and rotation data acquired in real time can be used as a basis for geological condition evaluation, the rock physical and mechanical properties are accurately mastered, and the subsequent mining plan and resource evaluation are served. On the other hand, the drill bit abnormality can be sensed in time according to the data, the drilling pressure parameters are adjusted, excessive wear is avoided, the drill bit life is prolonged, the drilling is continuously and efficiently carried out, and the overall operation efficiency is improved.

[0029] Fourthly, the drilling monitoring drill bit provided by the drilling monitoring drill bit is connected with the aviation socket of the monitoring bin through the aviation plug on the control panel, and the aviation plug is convenient to plug and pull, the connection is stable, the aviation plug is convenient to quickly overhaul or replace parts in the while-drilling monitoring process, the equipment debugging time is shortened, the downtime is reduced, the drilling efficiency is improved, the equipment can operate more stably, accurate data can be continuously output, the geological conditions can be accurately evaluated, the drill bit performance can be continuously optimized, the operation safety and efficiency are indirectly guaranteed;

[0030] Fifthly, in the drilling monitoring drill bit, the monitoring inner tube and the monitoring outer tube are sleeved, precise thread connection and O-ring sealing are used, the flexibility and stability of the equipment are enhanced, the flexible structure is helpful to quickly adjust the monitoring position in complex working conditions, different geological conditions are adapted to, the continuity of the while-drilling measurement is guaranteed, real-time geological information is continuously recorded, the drilling efficiency is improved, the stable sealing and connection protect the internal precise components, the equipment performance is maintained, the geological conditions are accurately evaluated, and the safety risk caused by equipment failure is reduced.

[0031] Sixthly, in the drilling monitoring drill bit, the through hole of the monitoring inner tube and the water flow passage of the monitoring outer tube are designed, so that the temperature sensor can accurately acquire data, and too much water flow can be prevented from forming a large water pressure outside the monitoring bin, so that water seepage in the monitoring bin is avoided and the monitoring effect is affected.

[0032] Seventhly, the non-magnetic pressure-bearing steel pipe is used as the pipe material of the drilling monitoring drill bit, the non-magnetic characteristic avoids interference with other downhole geomagnetic related operations, and the overall mining environment is stable; the strong pressure-bearing capacity maintains the integrity of the pipe body and protects the internal monitoring components. The stable operation of the equipment can continuously output accurate geological data, help to accurately adjust the drilling operation, improve the drilling efficiency, and lay a solid hardware foundation for accurately evaluating the geological conditions and reducing the safety risk.

[0033] Eighthly, the drilling monitoring drill bit can be installed only by screw connection, the simple and reliable installation method greatly simplifies the installation process, the operator can quickly start, quickly completes assembly when frequently changing the monitoring site, reduces the drilling delay caused by slow installation, improves the drilling efficiency, the equipment in place starts real-time monitoring in time, and key data can be transmitted in time for optimizing the drill bit performance, evaluating the geological conditions, reducing the safety risk.

[0034] Other advantages, objects and characteristics of the present application will be embodied partly through the following description, and partly will be understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a structural schematic view of the drilling monitoring drill bit described in one technical solution of the present application.

[0036] Figure 2Structure diagram of the monitoring assembly in another technical solution of the present application;

[0037] Figure 3 Structure diagram of the monitoring assembly in another technical solution of the present application;

[0038] Figure 4 Structure diagram of the connecting part in another technical solution of the present application;

[0039] Figure 5 Installation diagram of the temperature sensor in another technical solution of the present application;

[0040] Figure 6 Structure diagram of the water passage in another technical solution of the present application;

[0041] Wherein, 100, drill bit; 200, hollow long rod; 1, operating ring; 2, supporting rod; 3, connecting part; 4, monitoring inner tube; 5, monitoring outer tube; 6, male thread; 7, O-ring; 8, communication interface; 9, end cover; 10, temperature sensor; 11, control bin; 12, monitoring bin; 13, power bin; 31, connecting outer tube; 32, connecting inner tube; 33, reinforcing rib; 51, slot. DETAILED DESCRIPTION

[0042] The present application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement the present application according to the description and drawings.

[0043] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0044] As Figures 1-6 shown, the present application provides a drilling monitoring drill bit, comprising:

[0045] A drill bit body comprising a drill bit 100 and a hollow long rod 200, one end of the hollow long rod 200 is connected to the drill bit 100, and the other end is provided with an external thread connected to a drill rod, and the inner cavity of the hollow long rod 200 is in communication with a water passage in the drill bit;

[0046] A monitoring assembly arranged in the drill bit body, comprising a monitoring tube body for monitoring and a pair of end covers 9 sealingly connected to both ends of the monitoring tube body;

[0047] Wherein, the outer side wall of the monitoring tube body is provided with a plurality of groups of male threads 6 forming an annular structure, the inner wall of the hollow long rod 200 is provided with a plurality of groups of female threads matched with the plurality of groups of male threads 6, along the extension direction of the hollow long rod 200 towards the drill bit, the outer diameter of the annular structure formed by the plurality of groups of male threads 6 is gradually reduced, and the thread length of the plurality of groups of male threads 6 is the same.

[0048] In the technical scheme, the drilling monitoring drill bit comprises a drill bit body and a monitoring assembly, the monitoring assembly is arranged in the drill bit body through a thread structure, wherein, as shown in the drawings, the drill bit body comprises a drill bit 100 and a hollow long rod 200, one end of the hollow long rod is connected to the drill bit 100, the other end is connectable to a drill rod, the drill bit 100 has high-quality hard alloy cutting edges, so that the drill bit 100 has excellent wear resistance and cutting performance and can cope with various hard rock layers, an end of the hollow long rod 200 connected to the drill rod is provided with external threads matched with internal threads of an inner wall of the drill rod, and an inner cavity of the hollow long rod 200 is in communication with an inner cavity of the drill bit to form a smooth water passage, thereby providing a guarantee for subsequent deslagging and cooling during drilling. Figure 1 The monitoring assembly comprises a monitoring pipe body and end covers 9 arranged at two ends of the monitoring pipe body. The monitoring pipe body is made of a material resistant to high pressure and corrosion to adapt to a complex and harsh environment in a well. A pair of specially-made end covers 9 are accurately installed at two ends of the monitoring pipe body. The end covers 9 are in sealing connection with the monitoring pipe body. In one implementation, a sealing ring is arranged between the end covers 9 and the monitoring pipe body to ensure that the sealing is tight and to prevent water and dust in the well from entering the inside of the pipe body and affecting the normal work of the monitoring elements. A plurality of male threads 6 are processed on the outer side wall of the monitoring pipe body. Any one of the plurality of male threads 6 is arranged in a ring structure, that is, any one of the plurality of male threads 6 is arrayed on the circumference of the monitoring pipe body. The outer diameter of the ring structure formed by the plurality of male threads 6 gradually decreases in the extension direction of the hollow long rod to the drill bit. However, the thread length of each male thread 6 remains the same. The thread length refers to the length of the male thread 6 in the extension direction of the hollow long rod to the drill bit. The inner wall of the hollow long rod is provided with a plurality of female threads matched with the plurality of male threads 6. The rotation directions of the plurality of female threads are consistent.

[0049] In the technical scheme, when the drilling monitoring drill bit is installed, the inner wall of the hollow long rod 200 and the outer wall of the monitoring pipe body are first cleaned to remove possible attached sundries and ensure the smoothness of the thread connection. After the end covers 9 are sealingly connected with the monitoring pipe body, the sealing property is checked. The integrated monitoring assembly is inserted into the hollow long rod 200 until the frontmost male thread 6 is aligned with the corresponding female thread on the inner wall of the hollow long rod 200. After the initial engagement of the threads is felt, a light special-purpose downhole wrench is used to clamp the reserved force application part on the monitoring assembly. Then, the monitoring assembly is slowly and uniformly rotated. Since the male threads 6 and the female threads are designed precisely, the operator can gradually rotate the monitoring assembly along the hollow long rod 200 to the drill bit 100 according to the thread direction. Finally, the drilling monitoring drill bit is assembled.

[0050] In the technical scheme, the drilling monitoring drill bit has at least the following beneficial effects:

[0051] 1. The monitoring component is connected to the drill bit body through threads. This connection method abandons the traditional complex installation method. In the narrow space underground, no large auxiliary lifting equipment is required. Operators can quickly complete the assembly of the monitoring component and the drill bit body with the help of simple tools and following the guidance of the threads. Compared with the previous cumbersome installation process of bulky equipment, this greatly shortens the installation time, reduces the investment of manpower and material costs, and improves the overall operation efficiency.

[0052] 2. The threaded connection provides reliable mechanical connection. During the drilling process, the drill bit is subjected to huge axial forces, torque, and irregular impacts from the rock formation. The stable threaded engagement ensures that the monitoring component is firmly fixed to the drill bit body without loosening or displacement. This ensures stable and accurate monitoring data acquisition, laying a solid foundation for subsequent accurate assessment of geological conditions and adjustment of drilling strategies.

[0053] 3. The monitoring pipe body is sealed and connected to the end cap 9, and is equipped with a rubber sealing ring, which can effectively block the harsh environmental media rich in moisture and dust in the well. During long-term drilling operations, it avoids problems such as short circuits caused by moisture and malfunction of the precision monitoring components in the pipe body due to contamination by dust, thereby extending the service life of the monitoring components, reducing downtime caused by frequent equipment replacement and maintenance, and continuously outputting reliable data for mining operations;

[0054] 4. From the beginning of drilling, the monitoring component installed in the drill bit body can instantly capture various key data. Compared with traditional post-measurement, the real-time vibration and temperature data allows operators to quickly know the working status of the drill bit and the characteristics of the rock formation, and adjust the drilling speed, drilling pressure and other parameters in time to avoid ineffective drilling, optimize the entire mining process, and ensure safe and efficient mining.

[0055] like Figure 2 As shown, in one of the technical solutions, a communication interface 8 is provided at one end of the monitoring tube body, and the communication interface 8 is arranged close to the drill bit. An independent power supply compartment 13, a monitoring compartment 12 and a control compartment 11 are provided in the monitoring tube body to respectively install a lithium battery, a sensor group and a control board. The communication interface 8, the lithium battery and the sensor group are all electrically connected to the control board.

[0056] In the above technical scheme, the monitoring pipe body is provided with independent power supply compartment 13, monitoring compartment 12 and control compartment 11, the power supply compartment 13, monitoring compartment 12 and control compartment 11 are respectively used for installing lithium battery, sensor group and control panel, one end of the monitoring pipe body is provided with communication interface 8, the communication interface 8, the lithium battery, the sensor group are electrically connected with the control panel. Specifically, the monitoring pipe body should select high-strength, corrosion-resistant material to withstand the harsh environment in the well, the communication interface 8 at one end of the monitoring pipe body should ensure firm installation, and the specification and protocol of the communication interface 8 should match the subsequent data transmission system. The monitoring compartment 12 is provided with a sensor group, which includes multiple types, such as a high-sensitivity three-axis vibration acceleration sensor, the range and accuracy of which are selected according to the expected vibration range and measurement accuracy requirements in the well to accurately measure the vibration of the drill bit during drilling, a high-precision temperature sensor 10, the working range of which covers the extreme temperature that may occur in the well to ensure accurate measurement of the downhole environment temperature, and a reliable angular velocity sensor to monitor the rotation speed of the drill bit. The control compartment 11 is provided with a control panel, which should have corresponding interfaces to receive data from the sensor group and have the ability to process and convert data, while transmitting data externally through the communication interface 8. The performance of the control panel should be able to meet the needs of real-time data processing in the well to avoid data congestion or processing delay.

[0057] In the above technical scheme, the installation method of the monitoring pipe body is as follows: install the lithium battery in the power supply compartment 13 of the monitoring pipe body to ensure firm connection and avoid battery loosening caused by vibration in the well, resulting in poor contact, and accurately connect the positive and negative poles of the battery to prevent short circuit. Install the sensor group in the monitoring compartment 12, fix the three-axis vibration acceleration sensor, temperature sensor 10 and angular velocity sensor according to the designed position to ensure that their sensing parts can effectively sense the corresponding physical quantities, for example, the sensing part of the temperature sensor 10 is exposed at the appropriate position to accurately measure the temperature; the vibration sensor is installed at a position that can accurately sense the vibration, and good shock and impact protection is done to avoid damage to the sensor due to strong vibration in the well. Install the control panel in the control compartment 11 to ensure firm and reliable electrical connection between the control panel and the sensor group, lithium battery, connect using insulated wires to avoid short circuit risk, and properly route the wires to prevent mechanical damage or breakage due to friction in the complex environment in the well. Connect the output line of the sensor group to the corresponding input port of the control panel to ensure stable signal transmission, connect the output end of the lithium battery to the power input end of the control panel to ensure stable power supply for the control panel, and connect the communication interface 8 with the communication port of the control panel to enable the control panel to transmit processed data to the outside in time.

[0058] In the above technical solution, the communication interface 8, the lithium battery, the sensor group and the control board are integrated in the monitoring tube, forming a compact system, which avoids the problems of complex wiring and easy interference caused by the dispersion of components in traditional monitoring systems, making the whole monitoring system more compact and easier to deploy in narrow space underground, reducing installation difficulty and installation time; the communication interface 8 is arranged close to the drill bit, which can minimize the delay of data transmission, so that the data collected from the sensor can be quickly and accurately transmitted to the control board for processing, and the processed data can be sent out in time, which helps to realize real-time monitoring and enables the operator to make drilling decisions quickly based on the latest data information, avoiding decision-making errors caused by data delay and improving drilling efficiency and safety; the independent power supply compartment 13 provides a dedicated power storage and supply space for the system, ensuring that the lithium battery can work stably in the underground environment, and stable energy supply ensures the continuous operation of the sensor group and the control board, so that the monitoring will not be interrupted due to energy problems, and the underground monitoring can be carried out continuously for a long time, providing reliable data support for long-term drilling operation; the control board in the independent control compartment 11 can centrally process and analyze the data collected by the sensor group, and can flexibly adjust the data processing logic according to different geological conditions and drilling conditions underground, for example, in different rock layers, the control board can adjust the sampling frequency of the sensor, filter or correct abnormal data, to ensure that the most valuable and accurate data is provided to the operator; the sensor group equipped with multiple sensors can monitor the underground environment and drill bit state from multiple dimensions, including vibration, temperature and angular velocity, etc., providing rich and comprehensive information for the operator, which helps to better understand the underground geological conditions and drill bit working state, and provides strong support for optimizing drilling technology, prolonging drill bit life and improving drilling efficiency; the independent compartment design makes it more convenient to maintain and replace each component, when a component fails or needs to be upgraded, for example, the lithium battery needs to be replaced due to power attenuation, or the control board needs to update the software version, the operation can be directly performed in the corresponding compartment, without the need to disassemble the whole monitoring system, reducing maintenance cost and maintenance time.

[0059] As shown in Figure 3 In one of the technical solutions, the sensor group includes a three-axis vibration acceleration sensor, a temperature sensor 10 and an angular velocity sensor.

[0060] In the above technical solution, for the three-axis vibration acceleration sensor, according to the expected vibration range and the required measurement accuracy of the drilling operation, an acceleration sensor with a range of ±50g and an accuracy of ±0.1g is selected. This sensor should have good impact resistance and anti-interference ability to adapt to the complex vibration environment in the well. Before installation, it should be calibrated to ensure that its measurement axis is aligned with the axial, radial and tangential directions of the drill bit to accurately measure the vibration acceleration of the drill bit in three directions. The temperature sensor 10 selects a high-precision thermocouple sensor that can measure a range of -20°C to 100°C. The sensor should have fast response characteristics to quickly feedback information when the temperature changes in the well. It is installed near the cutting edge of the drill bit, but attention should be paid to protection to avoid damage due to rock impact during drilling. The angular velocity sensor selects a gyroscope with an accuracy of ±0.5° / s, which can accurately measure the rotational speed and direction of the drill bit. When installed, ensure that its axis coincides with the rotational axis of the drill bit to accurately measure the angular velocity of the drill bit.

[0061] In the above technical solution, the three-axis vibration acceleration sensor can accurately measure the vibration of the drill bit in three axial directions during drilling, providing detailed information on the stress state of the drill bit to the operator. Based on this information, it can be determined whether the drill bit is subjected to excessive impact force or lateral force, so that the drilling pressure and drilling speed can be adjusted in time to avoid damage to the drill bit due to excessive vibration, prolong the service life of the drill bit, and improve the overall operation efficiency. For example, when the axial vibration acceleration exceeds the set threshold, it indicates that the drilling pressure may be too high, and the drilling pressure can be appropriately reduced. The wear condition of the drill bit can also be determined based on the vibration of the three axial directions, so that the operator can adjust the drilling pressure parameters in time to avoid excessive wear and prolong the service life of the drill bit.

[0062] In the above technical solution, the temperature sensor 10 can monitor the environmental temperature in the well in real time, which helps to understand the thermal characteristics of the formation. In some areas with abundant geothermal resources or hot water layers, temperature data can help determine the formation structure and geological conditions, providing a basis for subsequent resource evaluation and exploitation planning. At the same time, excessive temperature may affect the performance of the equipment. By monitoring the temperature, measures such as cooling or replacing heat-resistant equipment can be taken in advance to ensure the safety and stability of the drilling operation.

[0063] In the above technical solution, the angular velocity sensor can reflect the rotation state of the drill bit in real time, including the rotational speed and direction. If the angular velocity suddenly drops or becomes unstable during drilling, it may indicate that the drill bit has encountered hard rock, stuck drill or other abnormal conditions. The operator can adjust the drilling parameters accordingly, such as increasing the torque or pausing the drilling for inspection, to prevent equipment damage and improve drilling efficiency.

[0064] In the above technical solution, the data of the three sensors are integrated, and the operator can more comprehensively master the geological conditions and the working state of the drill bit in the well, for example, in soft rock stratum, it can be observed that the vibration acceleration is small, the temperature is relatively low, and the angular velocity is relatively stable, and the drilling speed can be appropriately increased; in hard rock stratum, the corresponding data will have different characteristics, and parameters such as drilling pressure, drilling speed and torque can be adjusted according to these information to realize adaptive drilling in different geological conditions, improve drilling efficiency and reduce drilling cost. Through continuous monitoring of sensor data, abnormal conditions in the drilling process can be found in advance, for example, abnormal fluctuations in vibration acceleration may indicate that the drill bit is wearing out or the geological conditions are suddenly changing; abnormal changes in angular velocity may mean that the drill bit is stuck or the transmission system is malfunctioning; abnormal temperature rise may indicate that the equipment is overheating or approaching a high-temperature stratum. These early warning signals can help operators take appropriate preventive measures to avoid more serious failures and safety accidents.

[0065] In one of the technical solutions, the control board is provided with an outwardly extending aviation plug, and the monitoring bin 12 is provided with an aviation socket corresponding to the aviation plug. The aviation plug has the characteristics of easy plugging and unplugging, and in the downhole environment, the operator can quickly complete the connection operation of the control board and the monitoring bin 12. Compared with the traditional connection method, it does not need to use complex tools or go through tedious wiring steps, greatly saving the installation and maintenance time. A special connection structure is adopted between the aviation plug and the aviation socket, which has a reliable locking mechanism and can ensure that the connection is firm during drilling, even under the influence of complex downhole working conditions such as strong vibration, impact and rotation. It can prevent data transmission interruption or signal interference problems caused by loose connection and ensure stable transmission of monitoring data, providing reliable hardware connection guarantee for continuous drilling monitoring. The aviation plug and the aviation socket are usually made of high-quality conductive materials and have good conductivity, which can reduce the loss of signals in the transmission process and ensure high signal quality of data transmission between the control board and the monitoring bin 12. This is crucial for accurate sensor data transmission, avoiding data errors caused by poor connection, improving data accuracy and reliability, and enabling operators to make more scientific drilling decisions based on accurate monitoring data. There are various electromagnetic interference sources in the downhole environment, such as motors, power transmission lines, etc. The shielding design of the aviation plug and the aviation socket can effectively reduce the influence of electromagnetic interference on signal transmission, reduce signal crosstalk and noise, and enable the data collected from the sensor group to be transmitted to the control board with higher quality, ensuring the stability and integrity of signal transmission and providing a clean and accurate data basis for subsequent data analysis and processing.

[0066] In the above technical solution, the connection mode of the aviation plug and the aviation socket makes the disassembly and replacement of the components easier, and this design helps to realize the modular maintenance of the monitoring system. Different modules (such as the control panel and the monitoring bin 12) can be maintained as independent units, which makes the maintenance work more targeted and efficient, and reduces the skill requirements for professional maintenance personnel, because the maintenance personnel do not need to be familiar with the complex connection of the entire system, but only need to focus on the connection and function of a single module, thereby improving the convenience and operability of equipment maintenance.

[0067] As shown in Figure 2 , Figure 3 and Figure 5 , in one of the technical solutions, the monitoring pipe body includes a sleeved monitoring inner pipe 4 and a monitoring outer pipe 5, the monitoring inner pipe 4 is telescopic at either end of the monitoring outer pipe 5, and the monitoring inner pipe 4 is provided with the communication interface 8 at one end, the other end of the monitoring inner pipe is closed, both ends of the monitoring inner pipe 4 are provided with external threads matched with the internal threads of the end cap 9, the connection part between the monitoring outer pipe 5 and the end cap 9 is of equal diameter, and an O-ring 7 is arranged between the end of the monitoring outer pipe 5 and the end cap 9.

[0068] In the above technical solution, the monitoring pipe body is arranged in the structure of an inner and outer sleeve, which on the one hand increases the pressure-bearing capacity of the monitoring pipe body, and the sleeved structure of the monitoring inner pipe 4 and the monitoring outer pipe 5 provides double-layer protection for the internal precision components. The monitoring outer pipe 5 as the outer protection layer can withstand a certain degree of external impact, preventing the internal monitoring inner pipe 4 and the components contained therein from being damaged by the complex downhole environment. The monitoring inner pipe 4 provides a relatively closed internal environment for the internal sensor group, control panel, power supply and the like, further ensuring the safe and stable operation of these components in harsh environments and reducing the risk of equipment failure caused by external environmental factors. On the other hand, the flow path for the temperature sensor 10 monitoring can be better arranged, reducing the damage to the internal components of the monitoring inner pipe 4 caused by the water pressure of the flow path. In addition, the O-ring 7 arranged between the end of the monitoring outer pipe 5 and the end cap 9 enhances the sealing performance of the entire monitoring pipe body. In the harsh downhole environment, there may be water, mud, dust and other impurities. The presence of the O-ring 7 can effectively prevent these impurities from entering the inside of the monitoring pipe body, avoid damaging the internal precision components such as sensors, control panels and power supplies, ensure the normal operation of the equipment, prolong the service life of the equipment, and also ensure the accuracy and reliability of the monitoring data.

[0069] As shown in Figure 6As shown, in one of the technical solutions, the monitoring inner tube 4 is provided with a through hole for the temperature sensor 10 sensing section to pass through, and the monitoring outer tube 5 is provided with an inner groove opposite to the through hole, and the monitoring outer tube 5 is provided with a pair of grooves 51 connected to the inner groove to form a water passage. The monitoring inner tube 4 is provided with a through hole for the temperature sensor 10 sensing section to pass through, and the monitoring outer tube 5 is provided with a water passage connected to the through hole, so that the temperature sensor 10 can be in contact with the downhole environment, ensuring that the temperature sensor 10 is in the best position, thereby realizing accurate measurement of the downhole environment temperature. Compared with installing the temperature sensor 10 in other positions, this design not only can more truly reflect the temperature of the surrounding environment, avoid temperature measurement errors caused by indirect measurement or heat insulation effect of other components, provide more accurate temperature information for the operator, so as to better understand the thermal conditions of the formation, provide reliable basis for subsequent drilling and production decisions, but also can avoid the adverse effects of water infiltration in the monitoring chamber 12 caused by high water pressure.

[0070] As shown in the drawings, Figure 4 In one of the technical solutions, the end cap 9 provided at the closed end of the monitoring inner tube 4 is provided with a connecting part 3, which comprises:

[0071] A connecting sleeve, which comprises a connecting inner tube 32 sleeved on the end cap 9, and a connecting outer tube 31 connected with the connecting inner tube 32 through a reinforcing rib 33;

[0072] An operating ring 1 is provided away from the connecting sleeve, and a plurality of support rods 2 are provided between the operating ring 1 and the connecting inner tube 32;

[0073] Wherein, the connecting outer tube 31 is provided with a male thread 6 matched with a female thread on the inner wall of the hollow long rod, and the outer diameter of the annular structure formed by a group of male threads 6 on the connecting outer tube 31 is greater than the outer diameter of the annular structure formed by an adjacent group of male threads 6, and the thread length of the male threads 6 on the connecting outer tube 31 is the same as that of the male threads 6 on the monitoring outer tube 5.

[0074] In the above technical solution, the connecting part 3 is arranged close to the inlet of the hollow long rod, comprising a connecting sleeve and an operating ring 1, wherein the connecting sleeve comprises a connecting inner tube 32 and a connecting outer tube 31, the connecting inner tube 32 is used to connect with the end cover 9, the connecting outer tube 31 serves as a bottom support so that the outer diameter of the annular structure formed by the group of male thread 6 arranged thereon is larger than the outer diameter of the annular structure formed by the adjacent group of male thread 6, the connecting outer tube 31 and the connecting inner tube 32 are connected through a reinforcing rib 33, which ensures the strength of the connecting part 3, so that it can withstand greater axial force, torque and various external forces in complex downhole environment, in the drilling process, the drill bit and the monitoring assembly will be subjected to strong forces, such as the rotating torque and axial pressure transmitted by the drill pipe, the reinforcing structure of the connecting part 3 can ensure firm connection and prevent loosening or damage due to excessive force, ensuring the stable connection of the monitoring assembly and the hollow long rod, and providing a solid structural foundation for the stable operation of the monitoring system.

[0075] In the above technical solution, the operating ring 1 is arranged away from the connecting sleeve through a plurality of support rods 2, and the side of the operating ring 1 away from the connecting sleeve is provided with a texture convenient for wrench operation, so as to facilitate the installation of the monitoring assembly. The operating ring 1 provides a convenient operating point for the installation and removal process, and the operating personnel can apply a rotating force through the operating ring 1 when installing or removing the monitoring assembly in the downhole, so as to conveniently perform the screwing or separating operation of the thread. The plurality of support rods 2 connect the operating ring 1 and the connecting inner tube 32, so that the operating ring 1 can uniformly transmit force when bearing a large torque, avoiding connection failure or damage due to uneven force, improving the reliability and efficiency of operation. At the same time, since the operating ring 1 is away from the connecting sleeve, the operating personnel have a wider operating space when operating, reducing the difficulty of operating in the narrow downhole space. The design of the connecting part 3 cooperates with other connecting parts on the monitoring pipe body (such as the connection of the male thread 6 of the monitoring outer tube 5) to form a complete and reliable connection system, ensuring that the monitoring assembly will not loosen, leak or data transmission interruption due to connection problems during long-term drilling operation, providing protection for the long-term stable operation of the monitoring system, reducing equipment maintenance and downtime due to connection failure, and improving the efficiency of mine drilling operation.

[0076] In one of the technical solutions, the monitoring outer tube 5 and the monitoring inner tube 4 are both non-magnetic pressure-bearing steel pipes. Non-magnetic pressure-bearing steel pipes have excellent pressure-bearing capacity. During downhole drilling, they will face huge pressure from deep strata, especially in deep mines, where the pressure can have a serious impact on monitoring equipment. Using non-magnetic pressure-bearing steel pipes as monitoring outer tube 5 and monitoring inner tube 4 can effectively withstand the high pressure of the strata, ensuring that the pipe structure does not deform or rupture, protecting the internal monitoring components such as sensor groups, control boards, power supplies, etc. from pressure damage, ensuring the integrity and stability of the monitoring equipment, so that it can work normally in a high-pressure environment. Various electromagnetic equipment may be used in the downhole environment, such as electromagnetic detection instruments, downhole communication equipment, etc. The magnetic field generated by these devices can interfere with the pipe body made of traditional magnetic materials. The non-magnetic pressure-bearing steel pipe can avoid such magnetic field interference, prevent adverse effects on the sensors and signal transmission lines inside the monitoring equipment, and ensure the accuracy and reliability of the monitoring data. For example, for high-precision measuring instruments in the sensor group, such as triaxial vibration acceleration sensors, angular velocity sensors, etc., avoiding magnetic field interference can make them function normally, accurately measure the physical parameters of the downhole environment, and thus provide accurate monitoring data for drilling operations.

[0077] In one of the technical solutions, the drill bit body uses PDC polycrystalline diamond compact to cut and break rock. If the compact is worn out and broken, it can be replaced by heat melting, improving the efficiency of drilling operations.

[0078] The present application further claims protection for the installation method of the drilling monitoring drill bit, wherein the drill bit body and the monitoring assembly are connected through a thread.

[0079] In the above technical scheme, when installing the drilling monitoring probe, first check whether the drill bit body has damage signs, whether the external thread on the hollow long rod is deformed, and at the same time confirm that each part of the monitoring assembly is intact, especially the male thread 6 on the outer side wall of the monitoring tube body, which should be clear and complete without foreign matter blocking the thread. The operator holds the monitoring assembly, aligns the hollow long rod inlet of the drill bit body, and slowly extends the monitoring assembly into the hollow long rod due to the need for precise alignment of the thread connection. With the limited illumination underground, the male thread 6 on the outer side wall of the monitoring tube body initially contacts the female thread on the inner wall of the hollow long rod. This process requires smooth movements to prevent incorrect thread connection. After confirming the initial alignment, use professional underground tools, such as a suitable wrench, to hold the part (operation ring 1) on the monitoring assembly that is easy to apply force, and start rotating the monitoring assembly to gradually rotate the male thread 6 with the female thread, rotating into the extension direction of the hollow long rod towards the drill bit. Since the outer diameter of the annular structure formed by the male thread 6 decreases, attention should be paid to uniform effort during the rotation process to ensure that each group of threads is tightly engaged. Continue rotating until the monitoring assembly is completely installed in place. At this time, the monitoring assembly is stably connected with the drill bit body, forming a complete drilling monitoring drill bit. After installation is complete, the operator checks the connection part 3 again, gently shakes the monitoring assembly, and checks for signs of looseness. Check the thread connection near the inlet for gaps. If abnormalities are found, adjust and reinforce in time to ensure the structural stability of the entire drilling monitoring drill bit and lay a foundation for accurate monitoring in subsequent drilling operations.

[0080] In the above technical scheme, the monitoring assembly and the drill bit body are connected by thread connection. Compared with the complex installation interface and process of traditional monitoring equipment, the operation is more simple and direct. The underground working environment is harsh and the space is limited. Simple thread connection does not require long-term debugging by professional technicians. Ordinary operators can operate after simple training, greatly shortening the installation time, reducing the delay in mining caused by the installation process, and improving the overall mining efficiency. Thread connection can provide sufficient mechanical engagement force. During drilling, the drill bit bears a large axial force, torque, and vibration impact. Stable thread connection ensures that the monitoring assembly and the drill bit body do not easily come loose, maintains the relative position of the two, and ensures that the monitoring data is not disturbed by loose connection, always accurate and reliable, providing stable data support for subsequent mining decisions. The outer diameter of the annular structure of the male thread 6 gradually decreases in the extension direction of the hollow long rod towards the drill bit. This design allows the monitoring assembly to smoothly rotate into the drill bit body. Simple thread connection reduces the dependence on large auxiliary installation equipment, reduces additional equipment investment costs, and fast installation means reducing downtime waiting time, improving equipment utilization, and indirectly saving expenses for mining enterprises. It is especially suitable for small mining enterprises and helps to promote the wider application of advanced monitoring technology.

[0081] The number of devices and the scale of the processes described herein are intended to illustrate the application and should not be construed as limiting. Applications, modifications, and variations of the drilling monitoring bit and its method of installation will be apparent to those skilled in the art without departing from the general concept of the application.

[0082] While the embodiments of the application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, but can be applied to various fields suitable for the application, and additional modifications can be easily made by those skilled in the art, and thus the application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. Drilling monitoring drill bit, characterized in that, include: The drill body comprises a drill bit and a hollow long rod, one end of the hollow long rod is connected to the drill bit and the other end is provided with an external thread connected to the drill rod, and the inner cavity of the hollow long rod is connected to the water flow channel in the drill bit; A monitoring assembly is disposed in the drill bit body and includes a monitoring tube body for monitoring and a pair of end caps sealedly connected to both ends of the monitoring tube body; The outer wall of the monitoring tube body is provided with multiple groups of male threads forming an annular structure, and the inner wall of the hollow long rod is provided with multiple groups of female threads cooperating with the multiple groups of male threads. Along the extension direction of the hollow long rod toward the drill bit, the outer diameter of the annular structure formed by the male threads gradually decreases, and the thread length of the male threads is the same; A communication interface is provided at one end of the monitoring tube body, and the communication interface is arranged near the drill bit. The monitoring tube body is provided with independent power supply compartment, monitoring compartment and control compartment for installing lithium batteries, sensor groups and control boards respectively. The communication interface, the lithium batteries and the sensor groups are all electrically connected to the control board. The sensor group includes a three-axis vibration acceleration sensor, a temperature sensor and an angular velocity sensor; The monitoring tube body includes a sheathed monitoring inner tube and a monitoring outer tube, wherein either end of the monitoring inner tube is telescopically connected to the corresponding end of the monitoring outer tube, and one end of the monitoring inner tube is provided with the communication interface, and the other end of the monitoring inner tube is closed, and both ends of the monitoring inner tube are provided with external threads that are adapted to the internal threads of the end cap, and the connection between the monitoring outer tube and the end cap is of equal diameter, and an O-ring is provided between the end of the monitoring outer tube and the end cap; The monitoring inner tube is provided with a through hole for the temperature sensor sensing section to pass through, the monitoring outer tube is provided with an inner groove facing the through hole, and the monitoring outer tube is provided with a pair of slots connected to the inner groove to form a water flow passage.

2. The drilling monitoring drill bit according to claim 1, characterized in that: The control panel is provided with an outwardly extending aviation plug, and the monitoring compartment is provided with an aviation socket corresponding to the aviation plug.

3. The drilling monitoring drill bit according to claim 2, characterized in that: A connecting portion is provided on the end cap disposed at the closed end of the monitoring inner tube, and the connecting portion includes: A connecting sleeve, comprising a connecting inner tube sleeved on the end cover and a connecting outer tube connected to the connecting inner tube via reinforcing ribs; An operating ring is arranged away from the connecting sleeve, and a plurality of support rods are provided between the operating ring and the connecting inner tube; In which, the connecting outer tube is provided with a male thread that cooperates with the female thread on the inner wall of the hollow long rod, and the outer diameter of the annular structure formed by a group of male threads on the connecting outer tube is larger than the outer diameter of the annular structure formed by an adjacent group of male threads, and the male thread on the connecting outer tube has the same thread length as the male thread on the monitoring outer tube.

4. The drilling monitoring drill bit according to claim 3, characterized in that: The monitoring outer tube and the monitoring inner tube are both non-magnetic pressure-bearing steel tubes.

5. The drilling monitoring drill bit according to claim 4, characterized in that: The drill bit body uses PDC polycrystalline diamond composite sheets to cut and break rocks.

6. The method for installing a drilling monitoring drill bit according to any one of claims 1 to 5, wherein: The drill bit body and the monitoring component are connected via threads.

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