A drill bit with parameter measurement function

Abstract

The application discloses a drill bit with a parameter measurement function, comprising a parameter measurement module, a drill bit body and a joint short section connected with each other, and a sleeve arranged outside the drill bit body and the joint short section; the parameter measurement module and a data acquisition system are fixed after the manufacture of the drill bit body is completed, so that the damage of electronic components such as the parameter measurement module and the data acquisition system caused by high-temperature operations such as brazing PDC cutting teeth is avoided, and after the drill bit is taken out of a well, the devices are convenient to disassemble and assemble, and related operations such as data reading and maintenance are facilitated; in addition, the parameter measurement module and the data acquisition system are tightly connected with the drill bit body, so that the data error caused by relative movement is avoided; and the signal transmission path between the parameter measurement module and the data acquisition system is strictly controlled, so that the possibility of external interference on the signal in the transmission process is reduced, and the technical problem that the parameter measurement system on the drill bit is far away from the drill bit in the prior art and the measured data is inaccurate is solved.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas and geological drilling, and relates to drill bits, specifically a drill bit with parameter measurement function. Background Technology

[0002] The current development of oil and gas geological drilling technology is characterized by informatization, intelligence, and visualization. Drill bits, as direct rock-breaking tools in oil, gas, and geological drilling, are a crucial component of intelligent drilling systems. Developing drill bits with parameter measurement capabilities—equipping them with "eyes"—allows them to perceive the wellbore environment and their own working status in real time. This guides adjustments to drill bit morphology and drilling parameters, achieving optimal drilling efficiency and drill bit lifespan. This has become a hot topic of research in recent years.

[0003] Currently, near-bit engineering parameter measurements are primarily achieved using measurement subs. The sensors are located within the measurement sub, at a certain distance from the drill bit, resulting in significant deviations and lags between the measured parameters and the actual operating state of the drill bit. Furthermore, the sensor placement significantly impacts the accuracy and reliability of the measurement results. Near-bit measurement systems require a rational sensor placement to get as close to the drill bit as possible and minimize measurement errors. However, in practical applications, sensor placement is limited by various factors, such as drill string structure and space constraints. Therefore, how to achieve near-bit installation of the measurement device, more accurately reflect the actual interaction between the drill bit and the formation, and reduce errors and delays in data transmission remains a key technical challenge. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a drill bit with parameter measurement function, so as to solve the technical problem that the parameter measurement system on the drill bit is far away from the drill bit, resulting in inaccurate measurement data.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A drill bit with parameter measurement function includes a parameter measurement module and a connected drill bit body and a connector short section. A sleeve is fitted around the drill bit body and the connector short section. A groove is provided in the axial center of the sleeve. An annular sealed chamber is formed between the drill bit body, the connector short section and the sleeve. The parameter measurement module includes a triaxial piezoelectric accelerometer, a resistance strain gauge sensor and a temperature sensor.

[0007] A first central blind cavity is provided in the middle of the axial rear end of the drill bit body. The first central blind cavity includes a first section and a second section with successively increasing diameters. A plurality of cutter wings are provided on the axial front end face of the drill bit body. A flow channel is formed between adjacent cutter wings. A water eye is provided on each flow channel, which connects the first central blind cavity to the outside of the drill bit body. 4 to 6 keyways are uniformly provided circumferentially on the inner sidewall of the second section of the first central blind cavity. The triaxial piezoelectric accelerometer is installed in the keyways.

[0008] The inner wall of the second section of the first central blind cavity is provided with an annular groove, which is connected to the keyway, and a retaining spring is provided in the annular groove; 3 to 5 first axial blind holes are provided on the axial rear side of the drill body on the radial outer side of the first central blind cavity, and 3 to 5 first inner wall blind holes are provided on the inner wall of the first section of the first central blind cavity, and the first inner wall blind holes and the first axial blind holes correspond to each other and are connected.

[0009] An axial through hole parallel to the first central blind cavity is formed on the drill body on the radially outer side of the first central blind cavity; the temperature sensor is installed in the axial through hole; the axial front end of the axial through hole is located on the cutter wing of the drill body.

[0010] The axial front end of the connector section is provided with 4 to 6 first protrusions, which are engaged in the keyway of the drill bit body. The connector section includes a first segment and a second segment with successively decreasing diameters. The axial front end of the first segment is provided with a fan-shaped groove, and a second radial through hole is provided radially inward in the fan-shaped groove. Four rectangular mounting slots are evenly provided circumferentially on the side wall of the axial front side of the first segment of the connector section. Two rectangular mounting slots spaced 180° apart circumferentially are arranged in the same direction and parallel to the axial direction of the connector section. The other two rectangular mounting slots are arranged in the same direction and perpendicular to the axial direction of the connector section. The resistance strain gauge sensor is installed in the rectangular mounting slot. Wiring slots distributed circumferentially are provided between adjacent rectangular mounting slots.

[0011] A second central blind cavity is provided at the middle of the axial front end of the connector short section. The second central blind cavity is connected to the second radial through hole. A female thread is provided on the inner side wall of the axial rear side of the second central blind cavity. 3 to 5 second axial blind holes are evenly provided circumferentially on the connector short section on the radial outer side of the second central blind cavity. A data acquisition system is provided in the second central blind cavity. The data acquisition system is electrically connected to the triaxial piezoelectric accelerometer, the resistance strain gauge sensor, and the temperature sensor, respectively.

[0012] A third central blind cavity is provided in the middle of the axial rear end of the joint short section. Three to five second inner wall blind holes are provided on the inner wall of the third central blind cavity along the circumferential direction. The second inner wall blind holes correspond one-to-one with the second axial blind holes and are connected.

[0013] The outer wall of the axial rear end of the drill bit body is provided with a male thread; the axial rear end of the first section of the connector short section is provided with a male thread, and the axial rear end of the second section of the connector short section is provided with a male thread; both ends of the sleeve are provided with female threads, the female thread at the axial front end of the sleeve engages with the male thread at the axial rear end of the drill bit body, and the female thread at the axial rear end of the sleeve engages with the male thread at the axial rear end of the first section of the connector short section.

[0014] The mounting groove has a depth of 2-3 mm, a length of 30-35 mm, and a width of 16-18 mm.

[0015] The distance between the center of the four rectangular mounting slots and the axial front end face of the connector section is 10~15cm.

[0016] The drill bit body has 4 to 6 sets of first radial through holes on its axial rear end circumferential surface. The axial position of the first radial through holes is located on the axial rear side of the male thread of the drill bit body. The keyway communicates with the first radial through holes.

[0017] Multiple PDC cutting teeth are brazed onto the blade wing, and the axial front end of the axial through hole is close to the PDC cutting teeth.

[0018] Each of the first protrusions is provided with radially distributed outer wall blind holes; the outer wall blind holes correspond one-to-one with the first radial through holes of the drill bit body; countersunk screws are provided in both the first radial through holes and the outer wall blind holes.

[0019] The triaxial piezoelectric accelerometer includes a diamond-shaped body and a housing disposed at the axial rear end of the diamond-shaped body. A radially distributed central mounting through hole is provided at the axial center of the diamond-shaped body, and a pair of mounting blind holes are symmetrically provided at the axial front end of the diamond-shaped body.

[0020] The outer casing includes an outer casing body and 4-6 sets of second protrusions evenly arranged in the circumferential direction of the outer casing body. The second protrusions are engaged in the keyway of the drill bit body. A fourth central blind cavity is opened in the middle of the axial rear end of the outer casing body. The shape of the fourth central blind cavity is the same as that of the triaxial piezoelectric accelerometer. A first through hole is opened on the side wall of the outer casing body. A second through hole and a third through hole are opened on the axial front end face of the outer casing body. The first through hole corresponds to the central mounting through hole. The second through hole and the third through hole correspond one-to-one with the two mounting blind holes of the triaxial piezoelectric accelerometer and are fixed by screws respectively.

[0021] The wires of the triaxial piezoelectric accelerometer are led out through the axial rear end face and electrically connected to the data acquisition system via wires.

[0022] The resistance strain gauge is a foil resistance strain gauge, which is respectively pasted in the mounting groove. Adjacent resistance strain gauges are connected by wires. The wires are set in the wiring groove of the connector section. The wires of the resistance strain gauge pass through the second radial through hole of the connector section and are electrically connected to the data acquisition system.

[0023] The axial rear end face of the temperature sensor extends out of the axial rear end face of the drill bit body and is located in the fan-shaped groove of the connector short section; a mounting plate is provided at the rear end of the temperature sensor, and the mounting plate is fixed to the axial rear end face of the drill bit body by screws; the wire led out from the axial rear end of the temperature sensor passes through the second radial through hole of the connector short section and is electrically connected to the data acquisition system.

[0024] The data acquisition system has a tubular structure, and a male thread is machined on the outer wall of the axial rear end of the data acquisition system. The data acquisition system is located in the second central blind cavity of the connector short section and meshes with the female thread in the second central blind cavity of the connector short section.

[0025] The data acquisition system includes a power supply battery, a power conversion module, and a signal conditioning module, an A / D conversion module, a control and calculation module, and a data storage module connected in sequence. The power supply battery is connected to the power conversion module, and the power conversion module is connected to the parameter measurement module, the power conversion module, the signal conditioning module, the A / D conversion module, the control and calculation module, and the data storage module, respectively.

[0026] The power conversion module is used to convert the voltage provided by the power supply battery to obtain the voltage required for the normal operation of the parameter measurement module and each module of the data acquisition system.

[0027] The signal conditioning module is used to amplify the output voltage of the parameter measurement module;

[0028] The A / D conversion module is used to convert the analog signal amplified by the signal conditioning module into a digital signal.

[0029] The control and operation module is used to acquire and process the digital signal obtained after processing by the A / D conversion module, and to control the operation of peripheral devices;

[0030] The data storage module is used to store the data collected and processed by the control and operation module.

[0031] Compared with the prior art, the beneficial technical effects of this invention are:

[0032] (I) In this invention, the parameter measurement module and data acquisition system are installed and fixed after the drill bit body is manufactured, which avoids damage to electronic components such as the parameter measurement module and data acquisition system caused by high-temperature operations such as brazing PDC cutting teeth. Furthermore, the devices are easy to disassemble and assemble after the drill bit exits the well, facilitating data reading or maintenance. In addition, the parameter measurement module and data acquisition system are tightly connected to the drill bit body, with no relative movement. Due to the sleeve design, data errors caused by relative movement are avoided. Moreover, the signal transmission path between the parameter measurement module and the data acquisition system is strictly controlled, reducing the possibility of external interference during signal transmission. The signal attenuation is small, improving the stability and accuracy of the signal. This solves the technical problem in the prior art where the parameter measurement system on the drill bit is far from the drill bit, resulting in inaccurate measurement data.

[0033] (II) During the drilling process, drilling tools such as drill pipes may generate vibration and electromagnetic noise. In this invention, the measuring sensor is placed inside the drill bit body, forming a physical isolation between it and other drilling tools. This can effectively reduce the direct impact of electromagnetic, vibration and other interference sources on the sensor signal, thereby more accurately reflecting the actual drilling conditions of the drill bit.

[0034] (III) In this invention, the drilling fluid passes sequentially through the third central blind cavity, the second inner wall blind hole, the second axial blind hole, the first axial blind hole, the first inner wall blind hole and the water eye, cooling the PDC cutting teeth and carrying rock powder. The drilling fluid is completely isolated from the parameter measurement module and the data acquisition system 5, thus avoiding damage to electronic components by the fluid. Attached Figure Description

[0035] Figure 1 This is a cross-sectional view (AA) of the overall structure of the present invention;

[0036] Figure 2 This is a cross-sectional view of the overall mechanism of the present invention (BB).

[0037] Figure 3 This is a three-dimensional view of the overall mechanism of the present invention;

[0038] Figure 4 This is a cross-sectional view AA of the drill bit body of the present invention;

[0039] Figure 5 This is a cross-sectional view of the drill bit body BB of the present invention;

[0040] Figure 6 This is a cross-sectional view of the connector section AA of the present invention;

[0041] Figure 7 This is a cross-sectional view of the connector short section BB of the present invention;

[0042] Figure 8 This is a structural view of the accelerometer sensor of the present invention;

[0043] Figure 9 This is a structural view of the accelerometer housing of the present invention;

[0044] Figure 10 This is a schematic diagram of the data acquisition system of the present invention.

[0045] The meanings of the labels in the diagram are as follows: 1. Drill bit body, 2. Connector section, 3. Sleeve, 4. Parameter measurement module, 5. Data acquisition system, 6. PDC cutting teeth, 7. Sealing chamber, 8. Snap ring, 9. Countersunk screw;

[0046] Blade 101, flow channel 102, water eye 103, first central blind cavity 104, first radial through hole 105, keyway 106, slot 107, first axial blind hole 108, first inner wall blind hole 109, axial through hole 110.

[0047] First protrusion 201, outer wall blind hole 202, sector groove 203, second radial through hole 204, mounting groove 205, wiring groove 206, second central blind cavity 207, third central blind cavity 208, second inner wall blind hole 209, second axial blind hole 210.

[0048] Triaxial piezoelectric accelerometer 401, resistive strain gauge sensor 402, temperature sensor 403;

[0049] Mounting through hole 40101, mounting blind hole 40102, housing 40103, resistance strain gauge sensor 402, mounting plate 40301;

[0050] Second protrusion 4010301, fourth central blind cavity 4010302, first through hole 4010303, second through hole 4010304, third through hole 4010305.

[0051] The specific content of the present invention will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0052] It should be noted that, unless otherwise specified, all components in this invention are those known in the art.

[0053] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0054] This invention provides a drill bit with parameter measurement function, including a parameter measurement module 4 and a connected drill bit body 1 and a connector short section 2. A sleeve 3 is sleeved on the outside of the drill bit body 1 and the connector short section 2. A groove is provided in the axial center of the sleeve 3. An annular sealed chamber 7 is formed between the drill bit body 1, the connector short section 2 and the sleeve 3. The parameter measurement module 4 includes a triaxial piezoelectric accelerometer 401, a resistance strain gauge sensor 402 and a temperature sensor 403.

[0055] A first central blind cavity 104 is provided in the middle of the axial rear end of the drill bit body 1. The first central blind cavity 104 includes a first section and a second section with successively increasing diameters. A plurality of cutter wings 101 are provided on the axial front end face of the drill bit body 1. A flow channel 102 is formed between adjacent cutter wings 101. A water eye 103 is provided on each flow channel 102, which connects the first central blind cavity 104 and the outside of the drill bit body 1. Four to six keyways 106 are uniformly provided circumferentially on the inner sidewall of the second section of the first central blind cavity 104. A triaxial piezoelectric accelerometer 401 is provided in the keyway 106.

[0056] The inner wall of the second section of the first central blind cavity 104 is provided with an annular groove 107, which is connected to the keyway 106. A retaining spring 8 is provided in the annular groove 107. The drill body 1 on the radially outer side of the first central blind cavity 104 is provided with 3 to 5 first axial blind holes 108 evenly distributed in the circumferential direction. The inner wall of the first section of the first central blind cavity 104 is provided with 3 to 5 first inner wall blind holes 109. The first inner wall blind holes 109 and the first axial blind holes 108 correspond to each other and are connected.

[0057] An axial through hole 110 parallel to the first central blind cavity 104 is provided on the drill body 1 on the radially outer side of the first central blind cavity 104; a temperature sensor 403 is installed in the axial through hole 110; the axial front end of the axial through hole 110 is located on the cutter wing 101 of the drill body 1.

[0058] The axial front end of the connector section 2 is provided with 4 to 6 first protrusions 201, which are engaged in the keyway 106 of the drill bit body 1. The connector section 2 includes a first section and a second section with successively decreasing diameters. The axial front end of the first section is provided with a fan-shaped groove 203, and a second radial through hole 204 is provided radially inward in the fan-shaped groove 203. Four rectangular mounting grooves 205 are evenly provided circumferentially on the side wall of the axial front side of the first section of the connector section 2. Two rectangular mounting grooves 205 are arranged in the same direction and parallel to the axial direction of the connector section 2, while the other two rectangular mounting grooves 205 are arranged in the same direction and perpendicular to the axial direction of the connector section 2. A resistance strain gauge sensor 402 is provided in the rectangular mounting groove 205. A wiring groove 206 distributed circumferentially is provided between adjacent rectangular mounting grooves 205.

[0059] A second central blind cavity 207 is provided in the middle of the axial front end of the connector short section 2. The second central blind cavity 207 is connected to the second radial through hole 204. A female thread is provided on the inner side wall of the axial rear side of the second central blind cavity 207. 3 to 5 second axial blind holes 210 are evenly provided circumferentially on the connector short section 2 on the radial outer side of the second central blind cavity 207. A data acquisition system 5 is provided in the second central blind cavity 207. The data acquisition system 5 is electrically connected to the triaxial piezoelectric accelerometer 401, the resistance strain gauge sensor 402, and the temperature sensor 403, respectively.

[0060] A third central blind cavity 208 is provided in the middle of the axial rear end of the joint short section 2. Three to five second inner wall blind holes 209 are provided on the inner wall of the third central blind cavity 208 along the circumferential direction. The second inner wall blind holes 209 correspond one-to-one with the second axial blind holes 210 and are connected.

[0061] In the above technical solution, the parameter measurement module 4 and the data acquisition system 5 are installed and fixed after the drill bit body 1 is manufactured. This avoids damage to electronic components such as the parameter measurement module 4 and the data acquisition system 5 caused by high-temperature operations such as brazing the PDC cutting teeth. Furthermore, the devices are easy to disassemble and assemble after the drill bit exits the well, facilitating data reading or maintenance. In addition, the parameter measurement module 4 and the data acquisition system 5 are tightly connected to the drill bit body 1, eliminating relative movement. The design of the sleeve 3 also avoids data errors caused by relative movement. Moreover, the signal transmission path between the parameter measurement module 4 and the data acquisition system 5 is strictly controlled, reducing the possibility of external interference during signal transmission. This results in less signal attenuation, improving signal stability and accuracy, and solving the technical problem in the prior art where the parameter measurement system on the drill bit is far from the drill bit, leading to inaccurate measurement data.

[0062] Once the drill bit begins drilling, the triaxial piezoelectric accelerometer 401, the resistance strain gauge 402, and the temperature sensor 403 in the parameter measurement module 4 begin signal acquisition after being powered on. The data acquisition system 5 processes the signals transmitted by the parameter measurement module 4.

[0063] During drilling, drilling tools such as drill pipes may generate vibration and electromagnetic noise. In this solution, the measuring sensor is placed inside the drill bit body, forming a physical isolation between it and other drilling tools. This can effectively reduce the direct impact of electromagnetic, vibration and other interference sources on the sensor signal, thereby more accurately reflecting the actual drilling conditions of the drill bit.

[0064] In addition, the drilling fluid passes sequentially through the third central blind cavity 208, the second inner wall blind hole 209, the second axial blind hole 210, the first axial blind hole 108, the first inner wall blind hole 109, and the water eye 103, cooling the PDC cutting teeth and carrying rock powder. The drilling fluid is completely isolated from the parameter measurement module 4 and the data acquisition system 5, avoiding damage to electronic components by the fluid and thus avoiding affecting the accuracy of the measurement.

[0065] Specifically, the outer wall of the axial rear end of the drill bit body 1 is provided with a male thread; the axial rear end of the first section of the connector stub 2 is provided with a male thread, and the axial rear end of the second section of the connector stub 2 is provided with a male thread; both ends of the sleeve 3 are provided with female threads, the female thread at the axial front end of the sleeve 3 engages with the male thread at the axial rear end of the drill bit body 1, and the female thread at the axial rear end of the sleeve 3 engages with the male thread at the axial rear end of the first section of the connector stub 2.

[0066] Specifically, the groove 205 has a depth of 2~3mm, a length of 30~35mm, and a width of 16~18mm.

[0067] Specifically, the distance between the center of the four rectangular mounting slots 205 and the axial front end face of the connector short section 2 is 10~15cm.

[0068] Specifically, 4 to 6 sets of first radial through holes 105 are provided on the axial rear end circumferential surface of the drill bit body 1. The axial position of the first radial through holes 105 is located on the axial rear side of the male thread of the drill bit body 1. The keyway 106 is connected to the first radial through holes 105.

[0069] Specifically, multiple PDC cutting teeth 6 are brazed on the blade 101, and the axial front end of the axial through hole 110 is close to the PDC cutting teeth 6.

[0070] Specifically, each of the first protrusions 201 is provided with radially distributed outer wall blind holes 202; the outer wall blind holes 202 correspond one-to-one with the first radial through holes 105 of the drill bit body 1; countersunk screws 9 are provided in both the first radial through holes 105 and the outer wall blind holes 202.

[0071] In the above technical solution, the drill bit body 1 and the connector section 2 are tightened and fixedly connected; all countersunk screws 9 are located at the same axial height to ensure uniform force on the data acquisition system 5.

[0072] Specifically, the triaxial piezoelectric accelerometer 401 includes a diamond-shaped body and a housing 40103 disposed at the axial rear end of the diamond-shaped body. A radially distributed central mounting through hole 40101 is provided at the axial center of the diamond-shaped body, and a pair of mounting blind holes 40102 are symmetrically disposed at the axial front end of the diamond-shaped body.

[0073] The outer casing 40103 includes an outer casing body and 4 to 6 sets of second protrusions 4010301 evenly arranged in the circumferential direction of the outer casing body. The second protrusions 4010301 are engaged in the keyway 106 of the drill bit body 1. A fourth central blind cavity 4010302 is opened in the middle of the axial rear end of the outer casing body. The shape of the fourth central blind cavity 4010302 is the same as that of the triaxial piezoelectric accelerometer 401. A first through hole 4010303 is opened on the side wall of the outer casing body. A second through hole 4010304 and a third through hole 4010305 are opened on the axial front end face of the outer casing body. The first through hole 4010303 corresponds to the central mounting through hole 40101. The second through hole 4010304 and the third through hole 4010305 correspond one-to-one with the two mounting blind holes 40102 of the triaxial piezoelectric accelerometer 401 and are fixed by screws respectively.

[0074] The wires of the triaxial piezoelectric accelerometer 401 are led out through the axial rear end face and electrically connected to the data acquisition system 5 via wires.

[0075] Preferably, the retaining ring 8 is located at the axial rear of the housing 40103 to limit the axial displacement of the triaxial piezoelectric accelerometer 401.

[0076] In the above technical solution, the triaxial piezoelectric accelerometer 401 can effectively identify high-frequency vibrations with small displacements. The triaxial piezoelectric accelerometer 401 has an approximately diamond shape and occupies less than 60*45*25mm of space.

[0077] The triaxial piezoelectric accelerometer 401 features a built-in low-noise, high-gain circuit, excellent sealing performance, strong anti-interference capability, and omnidirectional mounting. The technical parameters of the triaxial piezoelectric accelerometer 401 are as follows: constant current source voltage 18-30VDC, operating constant current 2-20mA, DC bias voltage 10±2 VDC, output signal (peak) >5VP, output impedance <100Ω, measuring range 50g, frequency range 0.5-5000Hz, axial sensitivity 45mV / g, maximum lateral sensitivity <5%, operating temperature -40-120℃, and impact limit (without power supply) 1500g.

[0078] The resistance strain gauge 402 is a foil resistance strain gauge, which is attached to the mounting groove 205. Adjacent resistance strain gauges 402 are connected by wires. The wires are set in the wiring groove 206 of the connector stub 2. The wires of the resistance strain gauge 402 pass through the second radial through hole 204 of the connector stub 2 and are electrically connected to the data acquisition system 5.

[0079] In the above technical solution, the resistance strain gauge sensors 402 are distributed at 90° intervals on the outer circumferential surface of the joint section 2. Since the strain generated by drilling pressure is greatest in the axial direction, a patch measurement method is adopted along the axial direction. The bonding direction of the resistance strain gauge sensors 402 is consistent with the slotting direction of the mounting groove 205, thereby eliminating the influence of temperature and bending moment on the measurement results. Adjacent resistance strain gauge sensors 402 are connected by wires to form a full-bridge Wheatstone circuit, further eliminating the influence of bending moment and temperature on the measurement.

[0080] The measuring substrate of the resistance strain gauge sensor 402 is made of glass fiber reinforced phenolic resin. The measuring grid wire is made of nickel-chromium alloy uniaxial strain gauge. The grid wire is 6mm long, the rated resistance is 350Ω, and the temperature range is -50-200℃.

[0081] The specific steps for attaching the resistance strain gauge sensor 402 are as follows: First, use sandpaper to polish the mounting groove 205 of the connector short section 2, and soak a cleaning cloth in acetone to repeatedly clean the polished surface in one direction; drip special adhesive onto the back of the resistance strain gauge sensor 402 to begin attaching the strain gauge, and press it against the polyethylene sheet for 1 minute to squeeze out air bubbles or excess adhesive; finally, apply a protective layer to the resistance strain gauge sensor 402.

[0082] The axial rear end face of the temperature sensor 403 extends out of the axial rear end face of the drill bit body 1 and is located in the fan-shaped groove 203 of the connector short section 2; a mounting plate 40301 is provided at the rear end of the temperature sensor 403, and the mounting plate 40301 is fixed to the axial rear end face of the drill bit body 1 by screws; the wire led out from the axial rear end of the temperature sensor 403 passes through the second radial through hole 204 of the connector short section 2 and is electrically connected to the data acquisition system 5.

[0083] Preferably, the distance between the axial front end face of the temperature sensor 403 and the end face of the cutter wing 101 of the drill bit body 1 is less than 3cm, and it is sealed in the axial through hole 110 with encapsulating glue.

[0084] Temperature sensor 403 is a type K armored thermocouple made of nickel-chromium-nickel-silicon. The space occupied by temperature sensor 403 is less than Φ4×300mm, and the temperature measurement range is 0-850℃. It is suitable for use in oxidizing and inert atmospheres.

[0085] The mounting plate 40301 of the resistance strain gauge sensor 402 and the temperature sensor 403, as well as all connecting wires and countersunk screws 9 of the resistance strain gauge sensor 402 and the temperature sensor 403, are located inside the sealed chamber 7 to achieve isolation from the drilling fluid.

[0086] The data acquisition system 5 has a tubular structure. Male threads are machined on the outer wall of the axial rear end of the data acquisition system 5. The data acquisition system 5 is located in the second central blind cavity 207 of the connector stub 2 and meshes with the female thread in the second central blind cavity 207 of the connector stub 2.

[0087] Preferably, the diameter of the data acquisition system 5 is no greater than 50mm and the length is no greater than 300mm.

[0088] The present invention also provides a data acquisition system, including a power supply battery, a power conversion module, and a signal conditioning module, an A / D conversion module, a control and calculation module, and a data storage module connected in sequence; the power supply battery is connected to the power conversion module, and the power conversion module is connected to the parameter measurement module, the power conversion module, the signal conditioning module, the A / D conversion module, the control and calculation module, and the data storage module respectively;

[0089] The power conversion module is used to convert the voltage provided by the power supply battery to obtain the voltage required for the normal operation of the parameter measurement module 4 and each module of the data acquisition system;

[0090] The signal conditioning module is used to amplify the output voltage of parameter measurement module 4;

[0091] The A / D conversion module is used to convert the analog signal amplified by the signal conditioning module into a digital signal;

[0092] The control and processing module is used to acquire and process the digital signals obtained after processing by the A / D conversion module, and to control the operation of peripheral devices;

[0093] The data storage module is used to store the data collected and processed by the control and arithmetic module.

[0094] In the above technical solution, the data acquisition system uses the STM32F103 series microcontroller as its core, employing an ARM 32-bit Cortex-M3 core with a maximum operating frequency of 72MHz. It boasts high performance and low power consumption, greatly simplifying the complexity of program writing. The data acquisition system has 5 channels: 3 for acceleration, 1 for temperature, and 1 for drilling pressure. The acceleration channel has a sampling rate of 20kHz, while the other channels have a sampling rate of 1Hz. The data storage capacity of the data acquisition system is 32GB, with a continuous operating time of 100 hours at the highest sampling rate. It has an IP67 waterproof rating, a common-mode rejection ratio of not less than 100dB, and bridge voltages of 5V, 10V, and 24V, with a total power consumption of 2W.

[0095] Two sets of eight 9-12VDC rechargeable high-temperature lithium batteries connected in parallel power the parameter measurement module 4 and the data acquisition system 5.

[0096] The power conversion module uses a TPS62110HPWP synchronous buck converter to convert the voltage supplied to the lithium battery pack, providing the voltage required for normal operation to each sub-module of the parameter measurement module 4 and the data acquisition system 5. The power supply voltage is 3.1-17V, the adjustable output voltage is 1.2-16V, the operating temperature is -55-175℃, and it has an internal integrated overheat protection and current limiting circuit.

[0097] The signal conditioning module is connected to parameter measurement module 4 and uses an amplifier circuit to amplify the sensor's output voltage to meet the input requirements of the A / D conversion module. The signal conditioning module uses a dual-channel high-temperature operational amplifier AD8634, with an operating temperature of -40-175℃, supports rail-to-rail output, can be powered by a 3-30V power supply, and features low power consumption and low noise.

[0098] The A / D conversion module converts the amplified analog output signal from parameter measurement module 4 into a digital signal for communication with the microcontroller. The A / D conversion module uses the 16-bit high-temperature resistant precision analog-to-digital converter chip AD7981, with a maximum sampling frequency of 600kSPS, an operating temperature of -55-175℃, a logic interface voltage of 1.8-5V, 10 channels of high-precision analog-to-digital conversion, low power consumption, and high accuracy.

[0099] The control and arithmetic module uses an STM32F103RBT6 microcontroller to acquire and process data from the parameter measurement module 4 and control the operation of peripheral devices. The STM32F103RBT6 employs a high-performance ARM Cortex-M3 32-bit RISC core, operating at 72 MHz. It features single-cycle hardware multipliers and dividers, integrated 128k FLASH memory and 20kb SRAM memory, operates from 2.0-3.6 V, has an operating temperature range of -40-105°C, a 7-channel DMA controller, up to 80 fast I / O ports, 7 timers, and 9 communication interfaces. Its built-in crystal oscillator ensures a more stable operating clock.

[0100] The data storage module uses the Nand-type K9WAG08U1A flash memory chip. The K9WAG08U1A is designed for large-scale non-volatile memory applications, with a supply voltage of 2.7-3.6V, an operating temperature of -40-125℃, and a capacity of 32GB. A program operation on a (2K+64) byte page takes 200µs, and an erase operation on a (128K+4K) byte block takes 1.5ms. The I / O pins serve as ports for address and data input / output, as well as command input. The on-chip write controller automatically executes all program and erase functions.

Claims

1. A drill bit with parameter measurement function, characterized in that, The device includes a parameter measurement module (4) and a connected drill bit body (1) and a connector short section (2). A sleeve (3) is fitted around the drill bit body (1) and the connector short section (2). A groove is provided in the axial middle part of the sleeve (3). An annular sealed chamber (7) is formed between the drill bit body (1), the connector short section (2) and the sleeve (3). The parameter measurement module (4) includes a triaxial piezoelectric accelerometer (401), a resistance strain gauge sensor (402) and a temperature sensor (403). A first central blind cavity (104) is provided in the middle of the axial rear end of the drill bit body (1). The first central blind cavity (104) includes a first section and a second section with successively increasing diameters. A plurality of cutter wings (101) are provided on the axial front end face of the drill bit body (1). A flow channel (102) is formed between adjacent cutter wings (101). A water eye (103) is provided on each flow channel (102) that penetrates the drill bit body (1). The water eye (103) connects the first central blind cavity (104) and the outside of the drill bit body (1). 4 to 6 keyways (106) are uniformly provided circumferentially on the inner sidewall of the second section of the first central blind cavity (104). The triaxial piezoelectric accelerometer (401) is provided in the keyway (106). The inner wall of the second section of the first central blind cavity (104) is provided with an annular groove (107), which is connected to the keyway (106), and a retaining spring (8) is provided in the annular groove (107); 3 to 5 first axial blind holes (108) are provided on the axial rear side of the drill body (1) on the radial outer side of the first central blind cavity (104), and 3 to 5 first inner wall blind holes (109) are provided on the inner wall of the first section of the first central blind cavity (104), and the first inner wall blind holes (109) and the first axial blind holes (108) correspond to each other and are connected; An axial through hole (110) parallel to the first central blind cavity (104) is provided on the drill body (1) on the radially outer side of the first central blind cavity (104); the temperature sensor (403) is installed in the axial through hole (110); the axial front end of the axial through hole (110) is located on the cutter wing (101) of the drill body (1). The axial front end of the connector short section (2) is provided with 4 to 6 first protrusions (201), which are engaged in the keyway (106) of the drill bit body (1); the connector short section (2) includes a first section and a second section with successively decreasing diameters, the axial front end of the first section is provided with a fan-shaped groove (203), and the fan-shaped groove (203) is provided with a second radial through hole (204) in the radial direction; four protrusions are evenly provided in the circumferential direction on the side wall of the axial front side of the first section of the connector short section (2). Two rectangular mounting slots (205) are arranged in the same direction and parallel to the axial direction of the connector short section (2) at 180° intervals along the circumference; the other two rectangular mounting slots (205) are arranged in the same direction and perpendicular to the axial direction of the connector short section (2); the resistance strain gauge sensor (402) is installed in the rectangular mounting slot (205); and wiring slots (206) distributed along the circumference are opened between adjacent rectangular mounting slots (205). The joint short section (2) has a second central blind cavity (207) at the middle of its axial front end. The second central blind cavity (207) is connected to the second radial through hole (204). The inner wall of the axial rear side of the second central blind cavity (207) is provided with a female thread. The joint short section (2) on the radial outer side of the second central blind cavity (207) has 3 to 5 second axial blind holes (210) evenly opened in the circumferential direction. A data acquisition system (5) is provided in the second central blind cavity (207). The data acquisition system (5) is electrically connected to the triaxial piezoelectric accelerometer (401), the resistance strain gauge sensor (402), and the temperature sensor (403), respectively. The joint short section (2) has a third central blind cavity (208) at the middle of its axial rear end. The inner wall of the third central blind cavity (208) has 3 to 5 second inner wall blind holes (209) along the circumferential direction. The second inner wall blind holes (209) correspond one-to-one with the second axial blind holes (210) and are connected. The triaxial piezoelectric accelerometer (401) includes a diamond-shaped body and a housing (40103) disposed at the axial rear end of the diamond-shaped body. A radially distributed central mounting through hole (40101) is provided at the axial center of the diamond-shaped body, and a pair of mounting blind holes (40102) are symmetrically provided at the axial front end of the diamond-shaped body. The outer casing (40103) includes an outer casing body and 4-6 sets of second protrusions (4010301) evenly arranged in the circumferential direction of the outer casing body. The second protrusions (4010301) are engaged in the keyway (106) of the drill bit body (1). A fourth central blind cavity (4010302) is opened in the middle of the axial rear end of the outer casing body. The shape of the fourth central blind cavity (4010302) is the same as that of the triaxial piezoelectric accelerometer (401). The sidewalls of the outer casing body A first through hole (4010303) is provided on the upper part of the housing body, and a second through hole (4010304) and a third through hole (4010305) are provided on the axial front end face of the housing body. The first through hole (4010303) corresponds to the central mounting through hole (40101), and the second through hole (4010304) and the third through hole (4010305) correspond one-to-one with the two mounting blind holes (40102) of the triaxial piezoelectric accelerometer (401), and are respectively fixed by screws. The wires of the triaxial piezoelectric accelerometer (401) are led out through the axial rear end face and electrically connected to the data acquisition system (5) through the wires; The resistance strain gauge (402) is a foil resistance strain gauge, which is respectively pasted in the mounting groove (205). Adjacent resistance strain gauges (402) are connected by wires. The wires are set in the wiring groove (206) of the connector section (2). The wires of the resistance strain gauge (402) pass through the second radial through hole (204) of the connector section (2) and are electrically connected to the data acquisition system (5). The axial rear end face of the temperature sensor (403) extends out of the axial rear end face of the drill bit body (1) and is located in the fan-shaped groove (203) of the connector short section (2); the rear end of the temperature sensor (403) is provided with a mounting plate (40301), which is fixed to the axial rear end face of the drill bit body (1) by screws; the wire led out from the axial rear end of the temperature sensor (403) passes through the second radial through hole (204) of the connector short section (2) and is electrically connected to the data acquisition system (5).

2. The drill bit with parameter measurement function as described in claim 1, characterized in that, The outer wall of the axial rear end of the drill bit body (1) is provided with a male thread; the axial rear end of the first section of the connector short section (2) is provided with a male thread, and the axial rear end of the second section of the connector short section (2) is provided with a male thread; both ends of the sleeve (3) are provided with female threads, the female thread at the axial front end of the sleeve (3) engages with the male thread at the axial rear end of the drill bit body (1), and the female thread at the axial rear end of the sleeve (3) engages with the male thread at the axial rear end of the first section of the connector short section (2).

3. The drill bit with parameter measurement function as described in claim 1, characterized in that, The mounting groove (205) has a depth of 2~3mm, a length of 30~35mm, and a width of 16~18mm.

4. The drill bit with parameter measurement function as described in claim 1, characterized in that, The distance between the center of the four rectangular mounting slots (205) and the axial front end face of the connector short section (2) is 10~15cm.

5. The drill bit with parameter measurement function as described in claim 1, characterized in that, The drill bit body (1) has 4 to 6 sets of first radial through holes (105) on its axial rear end circumferential surface. The axial position of the first radial through holes (105) is located on the axial rear side of the male thread of the drill bit body (1). The keyway (106) is connected to the first radial through holes (105).

6. The drill bit with parameter measurement function as described in claim 1, characterized in that, Multiple PDC cutting teeth (6) are brazed on the blade (101), and the axial front end of the axial through hole (110) is close to the PDC cutting teeth (6).

7. The drill bit with parameter measurement function as described in claim 1, characterized in that, Each of the first protrusions (201) is provided with a radially distributed outer wall blind hole (202); the outer wall blind hole (202) corresponds one-to-one with the first radial through hole (105) of the drill bit body (1); countersunk screws (9) are provided in both the first radial through hole (105) and the outer wall blind hole (202).

8. The drill bit with parameter measurement function as described in claim 2, characterized in that, The data acquisition system (5) has a tubular structure. Male threads are machined on the outer wall of the axial rear end of the data acquisition system (5). The data acquisition system (5) is located in the second central blind cavity (207) of the connector short section (2) and meshes with the female thread in the second central blind cavity (207) of the connector short section (2).

9. The drill bit with parameter measurement function as described in claim 1, characterized in that, The data acquisition system (5) includes a power supply battery, a power conversion module, and a signal conditioning module, an A / D conversion module, a control and calculation module, and a data storage module connected in sequence; the power supply battery is connected to the power conversion module, and the power conversion module is connected to the parameter measurement module, the power conversion module, the signal conditioning module, the A / D conversion module, the control and calculation module, and the data storage module respectively; The power conversion module is used to convert the voltage provided by the power supply battery to obtain the voltage required for the normal operation of the parameter measurement module (4) and each module of the data acquisition system; The signal conditioning module is used to amplify the output voltage of the parameter measurement module (4); The A / D conversion module is used to convert the analog signal amplified by the signal conditioning module into a digital signal. The control and operation module is used to acquire and process the digital signal obtained after processing by the A / D conversion module, and to control the operation of peripheral devices; The data storage module is used to store the data collected and processed by the control and operation module.

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