A drill bit engineering parameter measurement system, a measurement method and a drill bit

Abstract

This invention relates to the field of drill bit engineering measurement technology, and discloses a drill bit engineering parameter measurement system, measurement method, and a drill bit. The system includes a central processing unit, a sensor unit, a battery, and an external memory connected to the central processing unit. The central processing unit is used to control the system to start according to the set drill bit start mode, and to set different power consumption operating states according to the working conditions after the drill bit starts normally. Based on the power consumption operating states, it controls the sensor unit to collect vibration and / or rotation speed signals of different levels at different sampling frequencies to obtain drill bit engineering parameters. Simultaneously, it stores the collected drill bit engineering parameters in the corresponding storage area of ​​the memory. The drill bit engineering parameter measurement system disclosed in this application solves the problems of low accuracy and incomplete measurement information for weak signals by sensors installed at the drill bit measurement position, enabling high-precision measurement of drill bit engineering parameters.

Description

Technical Field

[0001] This invention relates to the field of drill bit engineering parameter measurement technology, and particularly to a drill bit engineering parameter measurement system, measurement method, and a drill bit. Background Technology

[0002] As oil and gas exploration and development deepen, the geological structures drilled become increasingly complex, characterized by ultra-deep formations, ultra-high temperatures, and ultra-high pressures. This leads to increased wear on drill bits during rock breaking, frequently resulting in stuck drill bits, broken cones, and drill string breakage. These accidents are closely related to drill bit engineering parameters. Obtaining these parameters allows for analysis of vibration, torsion, and tension during drilling, enabling effective measures to improve drilling processes and prevent complex downhole accidents. Furthermore, optimizing drill bit structures based on downhole conditions can reduce drilling risks and accident rates.

[0003] Currently, near-bit engineering parameter measurement technologies have emerged both domestically and internationally. These technologies involve installing sensors close to the drill bit to monitor its impact, vibration, and rotation. Compared to measurement-while-drilling (MWD) tools (located further from the drill bit), these technologies provide a more accurate reflection of the drill bit's actual operating condition and offer higher data quality. However, because the sensors are positioned close to the drill bit, the vibration amplitude and rotation speed at the measurement point are significant, and the sensor's measurement range is wide. As a result, while the sensors exhibit high measurement accuracy for strong vibrations, high drilling speeds, and high drilling pressure signals, they have lower accuracy for weak vibrations and low rotation speeds. This makes it difficult to accurately measure weak signals, leading to incomplete drill bit engineering parameter measurement information. Summary of the Invention

[0004] The purpose of this invention is to provide at least one drill bit engineering parameter measurement system, measurement method, and drill bit, which can at least solve the problems of low measurement accuracy and incomplete measurement information of current drill bit measurement position sensor installations for weak signals, and at least achieve the effect of accurate measurement.

[0005] To address the aforementioned technical problems, at least one embodiment of this application provides a drill bit engineering parameter measurement system, comprising: a central processing unit, a sensor unit, and a battery, as well as a memory external to the central processing unit. The central processing unit, the sensor unit, and the battery are respectively disposed in several mounting slots on the outer wall of the drill bit sub. The sensor unit is used to collect vibration and / or rotation speed signals of different levels corresponding to the drill bit engineering parameters. The central processing unit is used to control the system to start according to the set drill bit start mode, and to set different power consumption operating states according to the working conditions after the drill bit starts normally. Based on the power consumption operating states, the central processing unit controls the sensor unit to collect vibration and / or rotation speed signals of different levels at different sampling frequencies to obtain the drill bit engineering parameters, and simultaneously stores the collected drill bit engineering parameters in the corresponding storage area of ​​the memory.

[0006] At least one embodiment of this application also provides a method for measuring drill bit engineering parameters, applicable to the aforementioned drill bit engineering parameter measurement system. The method includes: controlling the system to start according to the set drill bit start mode; setting different power consumption working states according to the working conditions after the drill bit starts normally; controlling the sensor unit to collect vibration and / or rotation speed signals of different levels at different sampling frequencies according to the power consumption working states to obtain drill bit engineering parameters; and storing the collected drill bit engineering parameters into the corresponding storage area in the memory.

[0007] At least one embodiment of this application also provides a drill bit, including a drill bit body and a drill bit subsection, wherein a plurality of mounting grooves are provided on the outer wall of the drill bit subsection; and the aforementioned drill bit engineering parameter measurement system is disposed in the plurality of mounting grooves.

[0008] The embodiments of this application provide a drill bit engineering parameter measurement system, measurement method, and a drill bit. The measurement system is activated by a central processing unit located on the outer wall of the drill bit sub, based on the drill bit's start-up mode. Different power consumption operating states are set according to the working conditions after normal drill bit startup. Based on these power consumption operating states, sensor units on the outer wall of the drill bit sub are controlled to collect vibration and / or rotational speed signals of different levels at different sampling frequencies to obtain drill bit engineering parameters. Simultaneously, the collected drill bit engineering parameters are stored in the corresponding storage area of ​​a memory external to the central processing unit. The technical solution of this application uses sensors with different ranges to measure signals of different intensity levels, and the central processing unit switches measurement modes in real time, achieving accurate measurement of weak signals and complete recording of drill bit information.

[0009] In some optional embodiments, the system further includes: a drill bit start-up mode setting unit connected to the central processing unit, which has start-up modes for drill bit timing, drill bit strong vibration, and drill bit high rotation speed; each start-up mode corresponds to a drill bit having a corresponding level of vibration and / or rotation speed signal after normal start-up; during system start-up, the sensor unit collects vibration and / or rotation speed signals of different levels at different sampling frequencies for each corresponding level of vibration and / or rotation speed signal that the drill bit should have after normal start-up. This embodiment, by setting different system start-up modes, can realize that the drill bit enters a normal working state after normal start-up.

[0010] In some optional embodiments, the drill bit timing start-up mode includes: a preset fixed time for the drill bit to reach the bottom position, and the central processing unit starts the system into a low-power state after the fixed time is reached to control the system to start normally. This embodiment achieves normal system startup and entry into normal working state by setting the time of the drill bit timing start-up mode.

[0011] In some optional embodiments, the drill bit strong vibration and high speed start-up mode includes: a preset system start-up time period; the central processing unit starts the system into a high-power state within the time period; and determines whether the drill bit vibration intensity and / or speed in the high-power state reaches the corresponding level of vibration intensity and / or speed required for normal drill bit start-up, so as to control the system to start normally. This embodiment achieves normal system start-up and entry into normal working state by setting the time of the drill bit strong vibration and high speed start-up mode and judging the working condition of the drill bit.

[0012] In some optional embodiments, setting different power consumption operating states according to the working conditions after the drill bit starts normally includes: a power consumption operating state machine connected to the central processing unit, which has low power consumption, medium power consumption, and high power consumption state control mechanisms; the central processing unit determines a control mechanism based on the drill bit vibration intensity and / or rotational speed, and each control mechanism corresponds to controlling the sensor unit to collect vibration and / or rotational speed signals of different levels at different sampling frequencies. This embodiment realizes the normal operation of the drill bit by enabling the sensor unit to collect signals of different levels at different sampling frequencies through different power consumption state control mechanisms.

[0013] In some optional embodiments, the control sensor unit includes three measurement ranges, namely, a small range, a medium range, and a large range;

[0014] When the power consumption working state machine is currently in a low power consumption state, the sensor unit measures the drill bit engineering parameters at a corresponding small range;

[0015] When the power consumption working state machine is currently in the medium power consumption state, the sensor unit measures the drill bit engineering parameters at the corresponding medium range;

[0016] When the power consumption operating state machine is currently in a high power consumption state, the sensor unit measures the drill bit engineering parameters at a corresponding large range.

[0017] This embodiment enables the sensor unit to select the corresponding measurement range by using different power consumption states, thereby realizing the measurement of drill bit engineering parameters.

[0018] In some optional embodiments, controlling the sensor unit to acquire vibration and / or rotation speed signals of different levels at different sampling frequencies according to the power consumption operating state to obtain drill bit engineering parameters, and simultaneously storing the acquired drill bit engineering parameters into the corresponding storage area in the memory, includes:

[0019] When the power consumption working state machine is currently in a low power consumption state, the central processing unit enables the sensor unit to use a small range and collects low-intensity vibration and / or rotation speed signals at a first sampling frequency to obtain the drill bit engineering parameters in the low power consumption state, and simultaneously stores the collected drill bit engineering parameters in the low power consumption state into the first storage area of ​​the memory.

[0020] When the power consumption working state machine is currently in the medium power consumption state, the central processing unit enables the medium range of the sensor unit and collects vibration and / or rotation speed signals of medium intensity level at a second sampling frequency higher than the first sampling frequency to obtain the drill bit engineering parameters in the medium power consumption state. At the same time, the collected drill bit engineering parameters in the medium power consumption state are stored in the second storage area of ​​the memory.

[0021] When the power consumption working state machine is currently in a high power consumption state, the central processing unit enables the large range of the sensor unit and acquires high-intensity vibration and / or rotation speed signals at a third sampling frequency higher than the second sampling frequency. At the same time, the acquired drill bit engineering parameters in the high power consumption state are stored in the third storage area of ​​the memory.

[0022] This embodiment uses a central processing unit to acquire and store signals of corresponding frequencies and levels from the ranges of the selected sensor units under different power consumption states, thereby achieving accurate measurement of weak signals and complete recording of drill bit information.

[0023] In some optional embodiments, the battery includes a plurality of battery cells; the outer diameter and length of the battery cells are 20 mm and 102 mm, respectively; the battery has a capacity of 8.5 Ah and an output voltage of 7.2 V, which provides power for system startup and normal operation. This embodiment defines specific battery parameters to match the power required for system startup and normal operation. Attached Figure Description

[0024] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, and these illustrative descriptions do not constitute a limitation on the embodiments.

[0025] Figure 1 This is a structural block diagram of a drill bit engineering parameter measurement system provided in one embodiment of this application;

[0026] Figure 2 This is a circuit block diagram of a drill bit engineering parameter measurement system provided in one embodiment of this application;

[0027] Figure 3 This is a flowchart of a drill bit engineering parameter measurement method provided in another embodiment of this application;

[0028] Figure 4 This is a drill bit structure diagram provided in another embodiment of this application. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this application to help readers better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0030] To facilitate understanding of the embodiments of this application, the relevant content of the technical concept of the solution of this application will be introduced first.

[0031] This invention provides a drill bit engineering parameter measurement system, including a central processing unit (CPU), sensors with different ranges, and a battery. The CPU handles startup mode settings, sensor switching, control circuit power consumption, data acquisition, and data storage. The system is mounted on the outer wall of a drill bit sub. The sub has mounting slots for the CPU, sensors, and battery, which respectively house the CPU, sensors, and battery. The system features a timed startup mode, a strong vibration startup mode, and a high-speed startup mode. After the drill bit is lowered into the well, the system enters a low-power operating state after the timed interval, and the small-range sensor switch is activated. The small-range sensor detects vibration signals (or speed signals), and the system acquires these signals using a lower sampling frequency. When downhole conditions change and drill bit vibration intensifies, the signal output from the small-range sensor is limited, and the circuit enters a medium-power operating state. The small-range sensor switch is deactivated, and the medium-range sensor switch is activated. The medium-range sensor detects vibration signals, and the system acquires these signals using a higher sampling frequency. When downhole conditions continue to change and drill bit vibration becomes severe, the signal output from the medium-range sensor is also limited, and the system enters a high-power operating state. The medium-range sensor switch is disconnected, while the large-range sensor switch is activated. The large-range sensor detects the vibration signal, and the system acquires this signal using a very high sampling frequency. Throughout the measurement process, the system automatically adjusts its operating state according to downhole conditions, using sensors with different ranges to acquire vibration signals of different intensity levels and storing them in memory in real time. This system not only provides high-accuracy measurement data and complete drill bit information, but also features low power consumption, long downhole operating time, and the ability to comprehensively evaluate the drill bit's operating status, thus preventing complex downhole accidents in a timely manner.

[0032] To address the aforementioned technical problems of low accuracy and incomplete measurement information for weak signals when using sensors installed at drill bit measurement positions, and based on the technical concept of the above-mentioned solutions, this invention proposes a drill bit engineering parameter measurement system, a measurement method, and a drill bit. The implementation details of the drill bit engineering parameter measurement system in this embodiment are described below. The following content is only for ease of understanding and is not necessary for implementing this solution.

[0033] Example 1:

[0034] The structural block diagram of the drill bit engineering parameter measurement system in this embodiment can be shown as follows: Figure 1 As shown, it includes a central processing unit 101, a sensor unit 102, and a battery 103, as well as a memory 104 external to the central processing unit 101. The central processing unit 101, the sensor unit 102, and the battery 103 are respectively disposed in several mounting slots on the outer wall of the drill bit sub.

[0035] The sensor unit 102 includes sensors with different ranges. The outer wall of the drill bit section is provided with a central processing unit mounting slot, a sensor mounting slot and a battery mounting slot, which respectively house the central processing unit 101, the sensors with different ranges and the battery 103. The central processing unit 101 is connected to an external memory 104.

[0036] The sensor unit 102 is used to collect vibration and / or rotation speed signals of different levels corresponding to the engineering parameters of the drill bit;

[0037] Specifically, sensors with different measurement ranges are categorized into small-range, medium-range, and large-range sensors. Drill bit engineering parameters are divided into different intensity levels, and vibration signals (or rotational speed signals) are classified into three levels: low-intensity vibration, medium-intensity vibration, and high-intensity vibration. Small-range, medium-range, and large-range sensors are used for data acquisition, respectively. Small-range sensors offer high sampling accuracy and sensitivity for weak signals, but they saturate and limit the signal amplitude for strong signals. Large-range sensors offer high sampling accuracy for strong signals but have low resolution for weak signals. Medium-range sensors offer sampling accuracy between those of small-range and large-range sensors.

[0038] The central processing unit 101 is used to control the system to start according to the set start mode of the drill bit, and to set different power consumption working states according to the working conditions after the drill bit starts normally. It also controls the sensor unit 102 to collect vibration and / or speed signals of different levels at different sampling frequencies according to the power consumption working states in order to obtain the drill bit engineering parameters. At the same time, it stores the collected drill bit engineering parameters into the corresponding storage area in the memory 104.

[0039] In other words, the central processing unit 101 accepts startup mode settings, switches sensor and control circuit power consumption, and collects and stores data. The power consumption operating states are divided into low-power, medium-power, and high-power states, corresponding to: low-range sensor operation (lower central processing unit sampling frequency, smaller data storage); medium-range sensor operation (higher central processing unit sampling frequency, larger data storage); and large-range sensor operation (very high central processing unit sampling frequency, very large data storage). The memory is divided into three storage areas (I, II, and III) according to vibration intensity levels. The central processing unit collects vibration signals sensed by sensors of different ranges and stores them in the corresponding storage areas, adding a time stamp. Vibration signals collected by small-range sensors are stored in area I, those collected by medium-range sensors in area II, and those collected by large-range sensors in area III.

[0040] It should be noted that for the above-mentioned rock breaking signal acquisition by the drill bit, the acquired data is stored in Zones I, II, and III. For fracture acoustic emission detection, signal acquisition is performed with the drill bit stationary at the bottom of the well, and the acquired data is stored in Zone I; for impactor vibration, signal acquisition is performed with the drill bit moving with the impactor, and the acquired data is stored in Zone III.

[0041] This embodiment uses sensors with different ranges to measure the engineering parameters of drill bits of different strength levels. It automatically adjusts the operating mode according to downhole conditions, enabling a comprehensive evaluation of the system's working status and timely prevention of complex downhole accidents. Furthermore, it collects and stores data according to strength levels, demonstrating good application results in fields such as fracture acoustic emission detection and impactor vibration measurement. In other words, by using sensors with different ranges to measure signals of different strength levels and switching measurement modes in real time through a central processing unit, complete recording of drill bit information is achieved.

[0042] In some embodiments, such as Figure 2 The circuit block diagram of the drill bit engineering parameter measurement system shown includes: a drill bit start-up mode setting unit 211 connected to the central processing unit, which has start-up modes of drill bit timing 201, drill bit strong vibration 202, and drill bit high speed 203; each start-up mode corresponds to a drill bit having a corresponding level of vibration and / or speed signal after normal start-up; during the start-up process, the sensor unit collects vibration and / or speed signals of different levels at different sampling frequencies corresponding to the vibration and / or speed signals after normal start-up of the drill bit.

[0043] Among them, such as Figure 2 As shown, the central processing unit 101 is connected to the drill bit start mode setting unit 211. The central processing unit 101 sets the start time 201, strong vibration start 202 and high speed start 203 through the start mode setting unit 211.

[0044] Specifically, the timer start-up time 201 is approximately equal to the time it takes for drill bit 40 to descend to the bottom of the well. Before drill bit 40 reaches the bottom of the well, the system is in a dormant state; after drill bit 40 reaches the bottom of the well, the system enters a low-power operating state.

[0045] Strong vibration start 202 Within a time period, the system briefly enters the high power consumption working state directly from the sleep state 209 to collect vibration signals. If the vibration signal reaches the high intensity vibration level, the system enters the normal working mode; otherwise, the system enters the sleep state.

[0046] High-speed start 203 Within a time period, the system briefly enters the high-power working state directly from the sleep state 209 by collecting the speed signal. If the speed signal reaches the high-intensity speed level, the system enters the normal working mode; otherwise, the system enters the sleep state.

[0047] In some embodiments, the drill bit timing start-up mode includes: a preset fixed time for the drill bit to reach the bottom position, and the central processing unit starts the system into a low-power state after the fixed time is reached to control the system to start normally.

[0048] Specifically, the start-up time of the timed start-up is approximately equal to the time it takes for the drill bit to descend to the bottom of the well. Before the drill bit reaches the bottom of the well, the system is in a dormant state; after the drill bit reaches the bottom of the well, the system enters a low-power operating state.

[0049] In some embodiments, the start-up mode of strong drill bit vibration and high drill bit rotation speed includes: a preset system start-up time period, during which the central processing unit starts the system into a high power consumption state, and determines whether the drill bit vibration intensity and / or rotation speed in the high power consumption state reaches the corresponding level of vibration intensity and / or rotation speed that the drill bit possesses after normal start-up, so as to control the system to start normally.

[0050] Specifically, the system performs the following start-up procedures: **High-Vibration Start-up:** Within a given time period, the system briefly transitions from sleep mode to high-power operation to acquire vibration signals. If the vibration signal reaches a high-intensity vibration level, the system enters normal operation mode; otherwise, it enters sleep mode. **High-Speed ​​Start-up:** Within a given time period, the system briefly transitions from sleep mode to high-power operation to acquire speed signals. If the speed signal reaches a high-intensity speed level, the system enters normal operation mode; otherwise, it enters sleep mode.

[0051] In some embodiments, setting different power consumption operating states according to the working conditions after the drill bit starts normally includes:

[0052] like Figure 2 As shown, the power consumption working state machine 213 connected to the central processing unit 101 has low power consumption, medium power consumption, and high power consumption state control mechanisms; the central processing unit 101 determines a control mechanism based on the drill bit vibration intensity and / or rotation speed, and each control mechanism corresponds to the control sensor unit 212 to collect vibration and / or rotation speed signals of different levels at different sampling frequencies.

[0053] Among them, such as Figure 2As shown, the central processing unit 101 is connected to the control sensor unit 212 and the power consumption state machine 213. The central processing unit 101 switches between low-power operating state 207, medium-power operating state 208, and high-power operating state 209 via the power consumption state machine 213. Low-power operating state 207 corresponds to the operation of the small-range sensor 204, with a low sampling frequency indicated by the central processing unit 101 and a small data storage size. Medium-power operating state 208 corresponds to the operation of the medium-range sensor 205, with a high sampling frequency indicated by the central processing unit 101 and a large data storage size. High-power operating state 209 corresponds to the operation of the large-range sensor 206, with a very high sampling frequency indicated by the central processing unit 101 and a very large data storage size.

[0054] In some embodiments, the control sensor unit 212 includes three measurement ranges, namely, small range, medium range, and large range;

[0055] When the power consumption working state machine is currently in a low power consumption state, the sensor unit measures the drill bit engineering parameters at a corresponding small range;

[0056] When the power consumption working state machine is currently in the medium power consumption state, the sensor unit measures the drill bit engineering parameters at the corresponding medium range;

[0057] When the power consumption operating state machine is currently in a high power consumption state, the sensor unit measures the drill bit engineering parameters at a corresponding large range.

[0058] Among them, such as Figure 2 As shown, the central processing unit 101 controls the sensor unit 212 to switch between a small-range sensor 204, a medium-range sensor 205, and a large-range sensor 206. The small-range sensor 204 senses vibration signals in the range of 0–20g, the medium-range sensor 205 senses vibration signals in the range of 20–200g, and the large-range sensor 206 senses vibration signals in the range of 200–500g.

[0059] In some embodiments, controlling the sensor unit to acquire vibration and / or rotation speed signals of different levels at different sampling frequencies according to the power consumption operating state to obtain drill bit engineering parameters, and simultaneously storing the acquired drill bit engineering parameters into the corresponding storage area in the memory, includes:

[0060] When the power consumption working state machine is currently in a low power consumption state, the central processing unit enables the sensor unit to use a small range and collects low-intensity vibration and / or rotation speed signals at a first sampling frequency to obtain the drill bit engineering parameters in the low power consumption state, and simultaneously stores the collected drill bit engineering parameters in the low power consumption state into the first storage area of ​​the memory.

[0061] When the power consumption working state machine is currently in the medium power consumption state, the central processing unit enables the medium range of the sensor unit and collects vibration and / or rotation speed signals of medium intensity level at a second sampling frequency higher than the first sampling frequency to obtain the drill bit engineering parameters in the medium power consumption state. At the same time, the collected drill bit engineering parameters in the medium power consumption state are stored in the second storage area of ​​the memory.

[0062] When the power consumption working state machine is currently in a high power consumption state, the central processing unit enables the large range of the sensor unit and acquires high-intensity vibration and / or rotation speed signals at a third sampling frequency higher than the second sampling frequency. At the same time, the acquired drill bit engineering parameters in the high power consumption state are stored in the third storage area of ​​the memory.

[0063] The memory 104 has a storage capacity of 8Gb and is divided into three storage areas: Zone I, Zone II, and Zone III, according to the vibration (or rotational speed) intensity level. The central processing unit 101 collects the vibration signals (or rotational speed signals) sensed by sensors with different ranges and stores them in the corresponding storage areas, adding time tags. The vibration signals (or rotational speed signals) collected by the small-range sensor 204 are stored in Zone I, the vibration signals (or rotational speed signals) collected by the medium-range sensor 205 are stored in Zone II, and the vibration signals (or rotational speed signals) collected by the large-range sensor 206 are stored in Zone III.

[0064] It should be noted that the system can acquire signals while the drill bit 40 is breaking rock, and the acquired data is stored in zones I, II, and III; it can also acquire signals while the drill bit 40 is stationary at the bottom of the well during fracture acoustic emission; and it can acquire signals while the drill bit 40 moves with the impactor during vibration. Specifically, data acquired during fracture acoustic emission is stored in zone I of memory 210, and data acquired during impactor vibration is stored in zone III of memory 210. This partitioned storage provides efficient data management capabilities for different application scenarios.

[0065] Specifically, combined Figure 2 The specific steps of the drill bit engineering parameter measurement workflow are as follows:

[0066] Step S1: Based on the drilling time of the drill bit 40 times to reach the bottom, set this time as the circuit timer start time 201.

[0067] Step S2: After the drill bit 40 is lowered to the bottom of the well, the system enters the low-power working state 207 after the timed period expires, and the small-range sensor 204 is switched on. The small-range sensor 204 senses the vibration signal (or speed signal), and the system uses a lower sampling frequency to collect the vibration signal (or speed signal).

[0068] Step S3: When the downhole conditions change and the drill bit 40 vibrates more strongly, the signal output of the small-range sensor 204 is limited, and the system enters a medium-power operating state 208. The small-range sensor 204 is disconnected, and the medium-range sensor 205 is simultaneously connected. The medium-range sensor 205 senses the vibration signal (or rotation speed signal), and the system uses a higher sampling frequency to acquire this vibration signal (or rotation speed signal). When the downhole conditions continue to change and the drill bit vibrates violently (or the rotation speed increases), the signal output of the medium-range sensor 205 is also limited, and the system enters a high-power operating state 209. The medium-range sensor 205 is disconnected, and the large-range sensor 206 is simultaneously connected. The large-range sensor 206 senses the vibration signal (or rotation speed signal), and the system uses a very high sampling frequency to acquire this vibration signal (or rotation speed signal).

[0069] Step S4: The system selects different power consumption operating states.

[0070] Step S5: The system uses sensors with different measurement ranges.

[0071] Step S6: The system collects vibration data (or rotational speed data).

[0072] Step S7: The system stores the collected data in partitions according to the vibration intensity (or rotational speed) level.

[0073] In some embodiments, combined with Figure 4 The battery 408 includes a plurality of battery cells; the outer diameter and length of the battery cells are 20mm and 102mm, respectively; the battery has a capacity of 8.5Ah and an output voltage of 7.2V, which provides power for system startup and normal operation.

[0074] Battery 408 powers the entire system with an output voltage of 7.2V and a capacity of 8.5Ah. It consists of two battery cells with an outer diameter of 20mm and a length of 102mm. In this embodiment, the battery powers the entire system; it is small in size, has a large capacity, is heat-resistant, and offers a long battery life.

[0075] Example 2:

[0076] The drill bit engineering parameter measurement method of this embodiment is applicable to the drill bit engineering parameter measurement system according to any one of claims 1-8, and its specific process can be as follows: Figure 3 As shown, it includes:

[0077] Step 301: Start the control system according to the set drill bit start mode.

[0078] Specifically, combined Figure 2The central processing unit 101 is connected to the startup mode setting unit 211. The central processing unit 101 sets three startup modes through the startup mode setting unit 211: timed startup 201, strong vibration startup 202, and high-speed startup 203. The timed startup 201 lasts approximately the same time as the drill bit 40 descends to the bottom of the well. Before the drill bit 40 reaches the bottom of the well, the system is in a dormant state; after the drill bit 40 reaches the bottom of the well, the system enters a low-power operating state. During the strong vibration startup 202, the system briefly transitions from a dormant state to a high-power operating state 209 to collect vibration signals within a certain time period. If the vibration signal reaches a high-intensity vibration level, the system enters a normal operating mode; otherwise, the system enters a dormant state.

[0079] High-speed start 203 Within a time period, the system briefly enters the high-power working state directly from the sleep state 209. The speed signal is collected. If the speed signal reaches the high-intensity speed level, the system enters the normal working mode; otherwise, the circuit enters the sleep state.

[0080] Step 302: Set different power consumption operating states according to the working conditions after the drill bit starts normally.

[0081] Specifically, combined Figure 2 The central processing unit 101 is connected to the control sensor unit 212 and the power consumption state machine 213. The central processing unit 101 switches between low-power operating state 207, medium-power operating state 208, and high-power operating state 209 via the power consumption state machine 213. Low-power operating state 207 corresponds to the operation of the small-range sensor 204, with a lower sampling frequency indicated by the central processing unit 101 and a smaller data storage size. Medium-power operating state 208 corresponds to the operation of the medium-range sensor 205, with a higher sampling frequency indicated by the central processing unit 101 and a larger data storage size. High-power operating state 209 corresponds to the operation of the large-range sensor 206, with a very high sampling frequency indicated by the central processing unit 101 and a very large data storage size.

[0082] Step 303: Based on the power consumption and operating status, control the sensor unit to collect vibration and / or rotation speed signals of different levels at different sampling frequencies to obtain drill bit engineering parameters.

[0083] Specifically, combined Figure 2The central processing unit 101 controls the sensor unit 212 to switch between small-range sensor 204, medium-range sensor 205, and large-range sensor 206. Drill bit engineering parameters are divided into different intensity levels, and vibration signals (or rotational speed signals) are divided into three levels: low-intensity vibration, medium-intensity vibration, and high-intensity vibration. Data acquisition is performed using the small-range sensor 204, medium-range sensor 205, and large-range sensor 206, respectively. The small-range sensor 204 has high sampling accuracy and sensitivity for weak signals, but it enters the saturation region and experiences signal limiting for strong signals. The large-range sensor 206 has high sampling accuracy for strong signals, but low resolution for weak signals. The medium-range sensor 205 has sampling accuracy between that of the small-range sensor 204 and the large-range sensor 206.

[0084] Step 304: Store the collected drill bit engineering parameters into the corresponding storage area in the memory.

[0085] Specifically, combined Figure 2 The memory 104 is divided into three storage areas: Zone I, Zone II, and Zone III, according to the vibration (or rotational speed) intensity level. The central processing unit 101 collects the vibration signals (or rotational speed signals) sensed by sensors with different ranges and stores them in the corresponding storage areas, adding time tags. The vibration signals (or rotational speed signals) collected by the small-range sensor 204 are stored in Zone I, the vibration signals (or rotational speed signals) collected by the medium-range sensor 205 are stored in Zone II, and the vibration signals (or rotational speed signals) collected by the large-range sensor 206 are stored in Zone III.

[0086] A specific embodiment, using a drill bit timed start-up mode, illustrates the system startup process and its operating mode after normal startup. The specific steps are as follows:

[0087] Step 1: Based on the time it takes for the drill bit to reach the bottom, set that time as the circuit's timer start time.

[0088] Step 2: After the drill bit is lowered to the bottom of the well, the system enters a low-power operating state after the timed period expires, and the small-range sensor switch is turned on. The small-range sensor senses the vibration signal (or speed signal), and the system uses a lower sampling frequency to collect the vibration signal (or speed signal).

[0089] Step 3: When the downhole working conditions change and the drill bit vibration (or rotation speed) becomes stronger, the signal output of the small range sensor is limited, and the system enters a medium power consumption working state. The small range sensor switch is turned off, and the medium range sensor switch is turned on at the same time. The medium range sensor senses the vibration signal (or rotation speed signal), and the system uses a higher sampling frequency to collect the vibration signal (or rotation speed signal).

[0090] Step 4: When the downhole conditions continue to change and the drill bit vibrates violently (or the rotation speed increases), the signal output by the medium-range sensor is also limited, and the system enters a high-power operation state. The medium-range sensor switch is turned off, and the large-range sensor switch is turned on at the same time. The large-range sensor senses the vibration signal (or rotation speed signal), and the system uses a very high sampling frequency to collect the vibration signal (or rotation speed signal).

[0091] Step 5: When the downhole working conditions continue to change, such as changes in drill bit vibration or rotation speed, the system selects different power consumption operating modes, uses sensors with different ranges to collect data, and stores the data in partitions according to vibration intensity levels.

[0092] Example 3:

[0093] Another embodiment of this application relates to a drill bit. The implementation details of this drill bit are described below. The following details are for ease of understanding and are not essential for implementing this solution. The structural diagram of the drill bit in this embodiment can be as follows: Figure 4 As shown, the drill bit 40 includes a drill bit body 401 and a drill bit sub 402. The outer wall of the drill bit sub 402 is provided with a plurality of mounting grooves. The drill bit engineering parameter measurement system as described above is provided in the plurality of mounting grooves.

[0094] For example Figure 4 As shown, a sensor mounting slot 403, a central processing unit mounting slot 404, and a battery mounting slot 405 are installed on the outer wall of the drill bit section 402, and a central processing unit 407, a sensor unit 406, and a battery 408 are respectively placed therein. The sensor unit 406 includes sensors with different ranges.

[0095] The drill bit provided in this embodiment has a drill bit engineering parameter measurement system that can use sensors with different ranges to measure the engineering parameters of drill bits of different strength grades. It can automatically adjust the working mode according to the downhole working conditions, comprehensively evaluate the working status of the drill bit, and prevent the occurrence of complex downhole accidents in a timely manner. At the same time, it can collect and store data according to the strength grade, and has good application effects in fields such as crack acoustic emission detection and impactor vibration measurement.

[0096] It is worth mentioning that all modules involved in this embodiment are logical modules. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. Furthermore, to highlight the innovative aspects of this application, this embodiment does not introduce units that are not closely related to solving the technical problems proposed in this application; however, this does not mean that other units are absent in this embodiment.

[0097] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing this application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of this application.

Claims

1. A drill bit engineering parameter measurement system, comprising: A central processing unit, a sensor unit, and a battery, as well as a memory external to the central processing unit, characterized in that the central processing unit, the sensor unit, and the battery are respectively disposed in several mounting slots on the outer wall of the drill bit sub. The sensor unit is used to collect vibration and / or rotation speed signals of different levels corresponding to the drill bit engineering parameters; The central processing unit is used to control the system to start according to the set drill bit start mode, and to set different power consumption working states according to the working conditions after the drill bit starts normally. It also controls the sensor unit to collect vibration and / or rotation speed signals of different levels at different sampling frequencies according to the power consumption working states to obtain drill bit engineering parameters, and stores the collected drill bit engineering parameters into the corresponding storage area in the memory.

2. The drill bit engineering parameter measurement system according to claim 1, characterized in that, The system also includes: The drill bit start-up mode setting unit connected to the central processing unit has start-up modes of drill bit timing, drill bit strong vibration, and drill bit high speed; after the drill bit starts normally, it has a corresponding level of vibration and / or speed signal. During system startup, the sensor unit collects vibration and / or rotation speed signals of different levels at different sampling frequencies, based on the corresponding levels of vibration and / or rotation speed signals that the drill bit should have after normal startup.

3. The drill bit engineering parameter measurement system according to claim 2, characterized in that, The drill bit timing start modes include: A fixed time is preset for the drill bit to reach the bottom position. After the fixed time is reached, the central processing unit starts the system into a low-power state to control the system to start normally.

4. The drill bit engineering parameter measurement system according to claim 2, characterized in that, The starting modes for strong drill bit vibration and high drill bit rotation speed include: The system startup time period is preset. During the preset time period, the central processing unit starts the system into a high power consumption state and determines whether the drill bit vibration intensity and / or rotation speed in the high power consumption state reaches the corresponding level of vibration intensity and / or rotation speed that the drill bit has after normal startup, so as to control the system to start normally.

5. The drill bit engineering parameter measurement system according to claim 1, characterized in that, The method of setting different power consumption operating states according to the working conditions after the drill bit starts normally includes: The power consumption working state machine connected to the central processing unit has low power consumption, medium power consumption, and high power consumption state control mechanisms; the central processing unit determines a control mechanism based on the drill bit vibration intensity and / or rotation speed, and each control mechanism corresponds to a control sensor unit that collects vibration and / or rotation speed signals of different levels at different sampling frequencies.

6. The drill bit engineering parameter measurement system according to claim 5, characterized in that, The control sensor unit includes three measurement ranges, namely, small range, medium range, and large range. When the power consumption working state machine is currently in a low power consumption state, the sensor unit measures the drill bit engineering parameters at a corresponding small range; When the power consumption working state machine is currently in the medium power consumption state, the sensor unit measures the drill bit engineering parameters at the corresponding medium range; When the power consumption operating state machine is currently in a high power consumption state, the sensor unit measures the drill bit engineering parameters at a corresponding large range.

7. The drill bit engineering parameter measurement system according to any one of claims 1-6, characterized in that, The step of controlling the sensor unit to acquire vibration and / or rotation speed signals of different levels at different sampling frequencies according to the power consumption operating state to obtain drill bit engineering parameters, and simultaneously storing the acquired drill bit engineering parameters into the corresponding storage area in the memory, includes: When the power consumption working state machine is currently in a low power consumption state, the central processing unit enables the sensor unit to use a small range and collects low-intensity vibration and / or rotation speed signals at a first sampling frequency to obtain the drill bit engineering parameters in the low power consumption state, and simultaneously stores the collected drill bit engineering parameters in the low power consumption state into the first storage area of ​​the memory. When the power consumption working state machine is currently in the medium power consumption state, the central processing unit enables the medium range of the sensor unit and collects vibration and / or rotation speed signals of medium intensity level at a second sampling frequency higher than the first sampling frequency to obtain the drill bit engineering parameters in the medium power consumption state. At the same time, the collected drill bit engineering parameters in the medium power consumption state are stored in the second storage area of ​​the memory. When the power consumption working state machine is currently in a high power consumption state, the central processing unit enables the large range of the sensor unit and acquires high-intensity vibration and / or rotation speed signals at a third sampling frequency higher than the second sampling frequency. At the same time, the acquired drill bit engineering parameters in the high power consumption state are stored in the third storage area of ​​the memory.

8. The drill bit engineering parameter measurement system according to claim 1, characterized in that, The battery comprises several battery cells; the outer diameter and length of the battery cells are 20mm and 102mm, respectively; the battery has a capacity of 8.5Ah and an output voltage of 7.2V, which provides power for system startup and normal operation.

9. A method for measuring engineering parameters of a drill bit, characterized in that, The method applicable to the drill bit engineering parameter measurement system according to any one of claims 1-8 includes: The system is activated according to the set drill bit activation mode; Different power consumption operating states are set according to the working conditions after the drill bit starts normally; Based on the power consumption and operating status, the sensor unit is controlled to collect vibration and / or rotation speed signals of different levels at different sampling frequencies to obtain drill bit engineering parameters; The collected drill bit engineering parameters are stored in the corresponding storage area of ​​the memory.

10. A drill bit, comprising a drill bit body and a drill bit sub, characterized in that, The outer wall of the drill bit sub section is provided with a plurality of mounting slots; the plurality of mounting slots are provided with a drill bit engineering parameter measurement system as described in any one of claims 1-8.

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