Integrated measurement-while-drilling data acquisition system and method suitable for complex drilling working conditions

Abstract

The invention discloses an integrated measurement-while-drilling data acquisition system and method suitable for complex drilling working conditions, and relates to the technical field of measurement, and the method comprises a sensor detection module which is used for acquiring underground parameters and outputting sensor signals; the signal acquisition module is used for acquiring the sensor signal output by the sensor detection module and transmitting the sensor signal to the main control module; the main control module is used for processing the sensor signal and transmitting the processed sensor signal to the excitation output module; the excitation output module is used for receiving and controlling the processed sensor signal and determining a control signal; and the upper computer monitoring module is used for monitoring and analyzing the control signals and completing acquisition, processing and transmission of underground parameters, and the accuracy and the stability of data acquisition are improved.

Description

Technical Field

[0001] The present application relates to the field of measurement technology, and in particular to an integrated measurement while drilling data acquisition system and method suitable for complex drilling conditions. Background Art

[0002] With the continuous development of oil and gas exploration technology, measurement while drilling (MWD) technology has been widely used in the drilling process of deep wells, offshore and unconventional oil and gas resources. This technology provides instant feedback for drilling operations by collecting key parameters such as temperature, pressure, speed and torque in real time, helping engineers to adjust drilling parameters in time and optimize the operation process, thereby improving operation efficiency and reducing potential risks. However, existing measurement while drilling systems face many technical challenges in their application.

[0003] First, the underground environment is usually very complex, especially in deep well and high temperature and high pressure drilling operations. Existing sensors and data acquisition equipment often find it difficult to adapt to extreme working conditions, resulting in equipment failure or inaccurate data.

[0004] Secondly, the current downhole data transmission technology often cannot ensure the stability and real-time transmission of data under the environment of electromagnetic interference and long-distance transmission, which in turn affects the timeliness and safety of operational decisions. In addition, the existing system can only collect limited downhole parameters, and the accuracy between different sensors is often inconsistent, making it difficult to provide comprehensive and accurate real-time data support. Furthermore, the power management of the existing system also faces problems. Downhole operations place high demands on batteries and power modules, but the existing system is difficult to provide a stable power supply during long-term downhole operations, resulting in equipment downtime or data loss. Finally, the signal processing capabilities of the existing measurement while drilling system are limited, and it is impossible to effectively filter, amplify and convert multi-channel, high-speed signals, affecting the accuracy and real-time performance of the data.

[0005] Existing measurement while drilling systems usually use multiple independent sensors and data acquisition modules, which have problems such as low integration, poor stability and high maintenance costs. Due to the different interfaces, connection methods and power consumption requirements between modules, the system is easily affected by signal interference and failures, resulting in unstable data acquisition and increasing the maintenance workload and cost of the equipment. Summary of the invention

[0006] The purpose of this application is to provide an integrated measurement while drilling data acquisition system and method suitable for complex drilling conditions, which solves the problem of inaccurate and unstable collected data.

[0007] To achieve the above objectives, this application provides the following solutions:

[0008] In a first aspect, the present application provides an integrated measurement while drilling data acquisition system suitable for complex drilling conditions, comprising:

[0009] A sensor detection module, used to collect downhole parameters and output sensor signals; the downhole parameters include temperature, pressure, rotation speed and torsion;

[0010] A signal acquisition module, used to acquire the sensor signal output by the sensor detection module and transmit the sensor signal to the main control module;

[0011] A main control module, used for processing the sensor signal and transmitting the processed sensor signal to the excitation output module; the main control module includes an STM32 single chip microcomputer;

[0012] An excitation output module, used to receive and control the processed sensor signal and determine a control signal;

[0013] The host computer monitoring module is used to monitor and analyze the control signal and complete the collection, processing and transmission of downhole parameters.

[0014] Optionally, the output ends of the pressure sensor, the torsion sensor and the rotation speed sensor are connected to the signal conditioning circuit; the pressure sensor, the torsion sensor and the rotation speed sensor output analog signals through the signal conditioning circuit;

[0015] The signal conditioning circuit is connected to the A / D converter; the output end of the A / D converter is connected to the GPIO pin of the STM32 microcontroller;

[0016] The temperature sensor and the STM32 microcontroller are connected to the 2 C bus interface; the temperature sensor is used to 2 C bus output digital signal; the STM32 single chip microcomputer is used for the A / D converter or I 2 The C bus receives the analog signal and the digital signal, and processes and stores the analog signal and the digital signal; the sensor signal includes the analog signal and the digital signal.

[0017] Optionally, the signal conditioning circuit is used to process the analog signal and convert the processed analog signal into a digital signal according to the A / D converter; the processing includes amplification processing and filtering processing.

[0018] Optionally, the conversion module is connected to the A / D converter and is used to convert the downhole parameter into a voltage signal; the A / D converter is used to convert the voltage signal into a digital signal.

[0019] Optionally, the integrated measurement while drilling data acquisition system suitable for complex drilling conditions includes multiple acquisition channels; the acquisition channels support bidirectional I 2 C bus communication, used to exchange information with the sensor modules and components; the acquisition channel can automatically detect the connection status of the sensor and identify the sensor signal; the sensor data includes type, serial number, calibration data and calibration date;

[0020] The information collection module is implemented by I 2 C bus access to the STM32 MCU, each connected to the I 2 The sensors on the C bus have unique addresses, and the data of the sensors are transmitted to the STM32 microcontroller to identify the signal type of the sensors.

[0021] Optionally, the excitation output module is also used to power strain gauges, external signal conditioning equipment, and pressure control equipment, and is pre-programmed;

[0022] The adjustable voltage output terminal of the excitation output module is connected to the power input terminal of the strain gauge to provide a power supply voltage for the strain gauge;

[0023] The adjustable current output terminal of the excitation output module is connected to the power input terminal of the external signal conditioning device, and is used to provide a stable current source for the external signal conditioning device;

[0024] The adjustable voltage output terminal of the excitation output module is connected to the power input terminal of the pressure control device to provide a working voltage for the pressure control device.

[0025] Optionally, the power supply and conversion module is used to provide stable power supply for each module; each module includes the sensor detection module, the signal acquisition module, the main control module, the excitation output module and the host computer monitoring module.

[0026] Optionally, the host computer monitoring module is also used to set data storage frequency, correct test data, display curves in real time and output Excel reports.

[0027] Optionally, the STM32 single-chip microcomputer serves as the main control module of the integrated measurement while drilling data acquisition system suitable for complex drilling conditions, as the control core; the operating temperature range of the STM32 single-chip microcomputer is -40°C-+80°C.

[0028] In a second aspect, the present application provides an integrated measurement while drilling data acquisition method applicable to complex drilling conditions, comprising:

[0029] Using the sensor detection module to collect downhole parameters and determine sensor signals; the downhole parameters include temperature, pressure, rotation speed and torsion;

[0030] Acquire the sensor signal of the sensor detection module, and transmit the sensor signal to the main control module;

[0031] The main control module is used to process the sensor signal, and the processed sensor signal is transmitted to the excitation output module; the main control module includes an STM32 single chip microcomputer;

[0032] Using the excitation output module to receive and control the processed sensor signal and determine a control signal;

[0033] The control signal is monitored and analyzed by the host computer monitoring module to complete the acquisition, processing and transmission of downhole parameters.

[0034] According to the specific embodiments provided in this application, this application has the following technical effects:

[0035] The present application provides an integrated measurement while drilling data acquisition system and method suitable for complex drilling conditions. The system acquires downhole parameters and sensor signals, obtains the sensor signals output by the sensor detection module, and the signals output by the sensor detection module are usually weak and may contain noise. The signals are amplified and filtered by the signal conditioning circuit to improve the signal-to-noise ratio of the signals and are transmitted to the main control module. The signals are processed and transmitted to the excitation output module. The excitation output module should accurately output control signals according to the instructions of the main control module to ensure control accuracy, receive and control the processed signals, determine the control signals, monitor and analyze the control signals, complete the acquisition, processing and transmission of downhole parameters, and improve the accuracy and stability of the acquired data. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 This is a structural schematic diagram of an integrated measurement while drilling data acquisition system suitable for complex drilling conditions in one embodiment of the present application.

[0038] Figure 2 An overall design schematic diagram of an integrated measurement while drilling data acquisition system suitable for complex drilling conditions is provided in one embodiment of the present application.

[0039] Figure 3 A schematic diagram of a prototype main control scheme of an integrated measurement while drilling data acquisition system suitable for complex drilling conditions provided in one embodiment of the present application.

[0040] Figure 4 A schematic diagram of a multi-parameter signal acquisition and automatic recognition structure provided in one embodiment of the present application.

[0041] Figure 5 A schematic diagram of a power supply and conversion module design scheme provided in one embodiment of the present application.

[0042] Figure 6 A schematic diagram of a voltage conversion circuit and a voltage stabilization circuit provided in one embodiment of the present application.

[0043] Figure 7 A flowchart of an integrated measurement while drilling data acquisition method suitable for complex drilling conditions is provided in accordance with an embodiment of the present application. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0046] An existing implementation scheme similar to the present application is based on the LabVIEW platform, designed and applied to real-time signal processing in the measurement while drilling system. The main steps of the scheme include: first, design a data acquisition module, drive a common A / D data acquisition card through a code interface node (Code Interface Node, CIN) icon to complete signal acquisition; then, use a finite impulse response (Finite Impulse Response, FIR) digital filter to suppress noise and smooth the collected signal, and use the filter module provided by LabVIEW to achieve efficient digital filtering; then, design a virtual oscilloscope module for real-time display of waveforms in the time domain and frequency domain, support multi-waveform display, and perform data analysis; then, develop a demodulation and decoding function, process the collected signal in real time, and display and analyze it; finally, according to the requirements of the field application, the user can choose different working modes and transmission frequencies, and perform parameter monitoring, data storage and real-time adjustment through a graphical interface. The scheme has been verified in many practical applications, showing strong real-time signal processing capabilities, good user experience and stable performance.

[0047] Existing measurement while drilling systems usually use multiple independent sensors and data acquisition modules, which have problems such as low integration, poor stability and high maintenance costs. Due to the different interfaces, connection methods and power consumption requirements between modules, the system is easily affected by signal interference and failures, resulting in unstable data acquisition and increasing the maintenance workload and cost of the equipment. Therefore, the present application proposes an integrated measurement while drilling data acquisition system suitable for complex drilling conditions. By integrating multiple sensors and data acquisition units into one platform, the system's integration and stability are improved, the risk of equipment failure is reduced, and the maintenance cost is reduced, making it more suitable for complex drilling environments.

[0048] The present application relates to measurement technology, in particular to a data acquisition platform for a measurement while drilling system, specifically a data acquisition platform capable of real-time acquisition, storage and transmission of key parameters during downhole drilling, such as temperature, pressure, rotation speed and torque. The acquisition platform of the present application can adapt to harsh downhole environments and realize multi-channel signal acquisition, automatic identification and efficient data transmission.

[0049] like Figure 1 As shown, an embodiment of the present application provides an integrated measurement while drilling data acquisition system suitable for complex drilling conditions, and the measurement while drilling data acquisition system includes the following modules.

[0050] S1: sensor detection module, used to collect downhole parameters and output sensor signals; the downhole parameters include temperature, pressure, rotation speed and torsion.

[0051] S2: A signal acquisition module, used for acquiring the sensor signal output by the sensor detection module and transmitting the sensor signal to the main control module.

[0052] S3: a main control module, used for processing the sensor signal and transmitting the processed sensor signal to the excitation output module; the main control module includes an STM32 single chip microcomputer.

[0053] S4: an excitation output module, used to receive and control the processed sensor signal and determine the control signal.

[0054] S5: A host computer monitoring module is used to monitor and analyze the control signal and complete the acquisition, processing and transmission of downhole parameters.

[0055] The present application provides an integrated downhole measurement data acquisition system suitable for complex drilling conditions, and its system architecture includes a power supply and conversion module, an STM32 main control module, a sensor detection module, a signal acquisition module, an excitation output module and a host computer monitoring software. The platform can collect downhole temperature, pressure, speed, and torque parameters in real time, and ensure the accuracy and real-time nature of the data through efficient signal processing, storage and transmission systems. The downhole measurement data acquisition platform solves a major technical problem: the existing downhole measurement system cannot simultaneously meet the needs of high-precision, multi-parameter real-time acquisition, processing and transmission, especially the reliability and stability issues in extreme downhole environments. The overall system design is as follows: Figure 2 As shown in the figure, the system framework of a measurement while drilling data acquisition platform is presented. The system includes a power supply and conversion module, which provides power support for each module; a sensor detection module, which is used to collect key downhole parameters such as temperature, pressure, speed and torque; a signal acquisition module, which is responsible for obtaining the signal output by the sensor and transmitting it to the main control unit; the STM32 microcontroller is used as the main control unit to process the collected data and realize signal control through the excitation output module; finally, the data is transmitted to the PC host computer through electromagnetic wave transmission for real-time monitoring and analysis. This design realizes the efficient collection, processing and transmission of downhole parameters, meeting the monitoring needs of complex drilling environments.

[0056] Further, in an exemplary embodiment, the output ends of the pressure sensor, the torsion sensor and the rotational speed sensor are connected to the signal conditioning circuit; the pressure sensor, the torsion sensor and the rotational speed sensor output analog signals through the signal conditioning circuit.

[0057] The pressure, torque and speed sensors output analog signals through conditioning circuits.

[0058] The signal conditioning circuit is connected to the A / D converter; the output end of the A / D converter is connected to the GPIO pin of the STM32 single-chip microcomputer.

[0059] All signals are sampled by AD or I 2 The data is transmitted to the STM32 microcontroller via the C interface for processing and storage. The storage media include EMMC storage, DDR3 memory and SD card external storage, and supports the expansion of data transmission function through the USB2.0 interface.

[0060] The temperature sensor and the STM32 microcontroller are connected to the 2 The temperature sensor is connected to the interface of the I 2 C bus output digital signal; the STM32 single chip microcomputer is used for the A / D converter or I 2 The C bus receives the analog signal and the digital signal, and processes and stores the analog signal and the digital signal; the sensor signal includes the analog signal and the digital signal.

[0061] The overall design of the measurement while drilling data acquisition system includes the following modules.

[0062] (1) Power supply and conversion module: The power supply and conversion module is used to provide stable power supply for each module. The power supply voltage of the sensor detection module is 24V, and the main control module is powered by 3.3V. This module includes voltage conversion and voltage stabilization circuits to ensure that each module of the system can obtain stable power supply.

[0063] (2) STM32 main control module: The main control module uses the STM32 microcontroller as the control core of the prototype, which is responsible for data reception, reading and storage, driving and control, and communicating with the host computer. The STM32 microcontroller has low power consumption, high performance, and a wide operating temperature range of -40℃ to +85℃, which meets the needs of the complex underground environment.

[0064] (3) Signal acquisition module: The signal acquisition module is responsible for collecting, filtering, A / D conversion and other processing of the sensor output signals. The processed data is further stored and communicated through the STM32 microcontroller. This module can support the acquisition of multiple signal types, including signals from temperature, pressure, speed and torque sensors.

[0065] (4) Excitation output module: The excitation output module is designed to drive strain gauges, external signal conditioning equipment, and pressure control equipment. The module can output adjustable voltage and current to meet the power supply requirements of downhole sensors and control equipment. The excitation output module can also be pre-programmed to respond to changes in input signals and output control signals.

[0066] (5) Host computer monitoring software: The host computer monitoring software communicates with the prototype through electromagnetic wave transmission, collects, displays and stores sensor data in real time, and has data playback function. The software supports data storage frequency setting, test data correction, real-time curve display, and Excel report output.

[0067] The platform uses STM32 as the main controller. The STM32 series microcontroller uses a 32-bit processor core, with an operating voltage range of 2.6V to 3.6V, low power consumption, and is suitable for long-term operation. The STM32 microcontroller can meet all functional requirements of the measurement while drilling platform. Figure 3 As shown in the figure, the framework design of a measurement while drilling data acquisition system is shown. The system includes a sensor detection module, a signal processing and acquisition module, a data storage and transmission module, and a host computer module. The pressure, torque and speed sensors output analog signals through the conditioning circuit, and the temperature sensor directly outputs digital signals through the I2C bus. All signals are transmitted to the STM32 microcontroller for processing and storage through AD sampling or I2C interface. The storage media includes EMMC storage, DDR3 memory and SD card external memory, and supports the expansion of data transmission function through the USB2.0 interface. The communication module realizes wireless data transmission from the underground to the ground through electromagnetic wave transmission and reception, and transmits the data to the PC host computer for monitoring and analysis. The power management module provides stable power support for the entire system to ensure the continuous operation of the equipment in the complex environment of the underground. The system integrates data acquisition, storage and transmission functions, and is suitable for multi-parameter monitoring and real-time data processing requirements in underground operations.

[0068] Furthermore, in an exemplary embodiment, the signal conditioning circuit is used to process the analog signal and convert the processed analog signal into a digital signal according to the A / D converter; the processing includes amplification processing and filtering processing.

[0069] The measurement while drilling sensor measures the original signal, and the output analog signals are all standard voltage or current signals. The signal conditioning circuit amplifies and filters the standard signal, and then passes through the A / D converter. Since it is required to be plug-in compatible, that is, whether the port is connected to the voltage or current being measured, the prototype can recognize and read the data. Consider designing ① ±10V and ±24V differential signal acquisition circuit; ②200mA AC / DC and encoder pulse signal acquisition circuit; ③sensor information communication circuit; ④bidirectional communication acquisition circuit. According to the sensor signal type identified by the single-chip bus, the logic controls the switch of the corresponding acquisition circuit of the sensor signal, and the acquired signal is converted and input into the single-chip microcomputer for A / D conversion and data storage.

[0070] Further, in an exemplary embodiment, the conversion module is connected to the A / D converter and is used to convert the downhole parameter into a voltage signal; the A / D converter is used to convert the voltage signal into a digital signal.

[0071] In an exemplary embodiment, the integrated measurement while drilling data acquisition system suitable for complex drilling conditions includes multiple acquisition channels; the acquisition channels support bidirectional I 2 C bus communication is used to exchange information with the sensor modules and components; the acquisition channel can automatically detect the connection status of the sensor and identify the sensor signal; the sensor data includes type, serial number, calibration data and calibration date.

[0072] The signal acquisition module is responsible for receiving the signal output by the sensor and filtering, amplifying and A / D converting it. Each acquisition channel has a 16-pin interface and supports bidirectional I 2 C communication is used to exchange information with external sensors and other components. 2 C bus, each connected sensor has a unique address and can transmit data in real time. The module supports automatic detection of sensor connection status, identification of sensor type, serial number, calibration data and calibration date to ensure data accuracy. Signal conditioning circuit: For the analog signal (such as voltage, current) output by the sensor, the signal conditioning circuit is responsible for amplifying and filtering the signal, and then converting it through the A / D converter to obtain a digital signal for processing by the main control microcontroller. ±10V and ±24V differential signal acquisition circuits, as well as 200mA AC / DC signal and encoder pulse signal acquisition circuits are designed to process different sensor output signals. Each acquisition channel is equipped with a switch for switching between different sensor signals to ensure the correct acquisition of different types of signals.

[0073] Design of multi-channel high-speed AC and DC voltage signal acquisition module. The prototype has multiple acquisition channels, each channel port is 16 pins and supports bidirectional I 2 C communication is used to exchange information with external sensors and components. The acquisition channel can automatically detect the connection status of the sensor and identify the sensor type, serial number, calibration data, and calibration date. 2 C bus is connected to the STM32 microcontroller. Each sensor connected to the bus has a unique address and can transmit data to the microcontroller to identify the sensor signal type.

[0074] The information collection module is implemented by I 2 C bus access to the STM32 MCU, each connected to the I 2The sensors on the C bus have unique addresses, and the data of the sensors are transmitted to the STM32 microcontroller to identify the signal type of the sensors.

[0075] Further, in an exemplary embodiment, the excitation output module is also used to power the strain gauge, the external signal conditioning device and the pressure control device, and is pre-programmed.

[0076] The adjustable voltage output terminal of the excitation output module is connected to the power input terminal of the strain gauge to provide a power supply voltage for the strain gauge.

[0077] Design of multi-channel high-speed AC / DC current signal acquisition software and hardware module. Each port of the prototype's acquisition channel provides an output excitation control voltage, and the excitation output has multiple functions as a constant voltage output or a constant current output. The signal can be a fixed, user-defined, or a predefined waveform pattern. Typically, this output is used to power strain gauges, external signal conditioning equipment, and pressure control equipment. The excitation output can also be pre-programmed as a control signal to respond to any input signal changes on any port. According to the requirements, the following circuits are designed: ① Maximum 24V / 55mA voltage / current excitation output adjustable circuit design; ② Frequency adjustable circuit design; ③ Constant voltage / constant current excitation output circuit design; ④ Programmable constant voltage / constant current excitation output module software implementation. Multi-parameter signal acquisition and automatic identification such as Figure 4 As shown in the figure, the framework structure of a multi-channel parameter measurement and automatic identification system is shown. The system collects various key parameters in the well through temperature, pressure, torque and speed sensors. After these signals pass through parameter and range multi-way switches, they are converted into voltage signals through corresponding conversion modules (such as R / V conversion, V / V conversion, I / V conversion, etc.). The converted signal is converted into a digital signal through the AD conversion module and transmitted to the microcontroller unit (MCU) for processing. The MCU integrates a power supply and management module, and is connected to external devices through a wired or wireless communication module to achieve data transmission and real-time monitoring. The system can support multi-channel signal cyclic measurement and automatic identification of parameter ranges. It is suitable for multi-parameter monitoring needs under complex working conditions and provides efficient and accurate data support for drilling operations.

[0078] The adjustable current output terminal of the excitation output module is connected to the power input terminal of the external signal conditioning device, and is used to provide a stable current source for the external signal conditioning device.

[0079] The adjustable voltage output terminal of the excitation output module is connected to the power input terminal of the pressure control device to provide a working voltage for the pressure control device.

[0080] The excitation output module is used to provide power for strain gauges, external signal conditioning equipment, and pressure control equipment. According to different working requirements; each acquisition channel provides an output excitation voltage to support constant voltage or constant current output. Fixed voltage, user-defined voltage, or predefined waveform output can be set as needed. Adjustable circuit design: The module is designed with a maximum 24V / 55mA voltage / current excitation output circuit, which can meet the different power supply requirements of downhole sensors. Frequency adjustable circuit design: According to working requirements, a frequency adjustable circuit is designed to allow the output frequency to be adjusted according to different working environments and sensor requirements. Programming control: The excitation output also supports automatic response to changes in the input signal through pre-programming, providing control signals to meet application requirements under different operating conditions.

[0081] Furthermore, in an exemplary embodiment, the power supply and conversion module is used to provide stable power supply for each module; each module includes the sensor detection module, the signal acquisition module, the main control module, the excitation output module and the host computer monitoring module.

[0082] The power management module provides stable power support for the entire system, ensuring the continuous operation of the equipment in the complex environment underground.

[0083] Power supply management functional module and electromagnetic compatibility design. In order to meet the convenient portability of the prototype, the prototype must be movable and rechargeable, and must be able to power each module. From the overall design plan of the system, it can be seen that the prototype contains many modules, and each module has different power requirements. The sensor power supply voltage is required to be 24V or 12V, and the microcontroller power supply voltage is 3.3V. Two 24V DC regulated rechargeable power supplies are selected to cooperate with the DC / DC step-down module to power each module of the system. A 24V lithium battery is selected as the charging and discharging power supply. In order to make the system have excellent electromagnetic compatibility, consider using a shell assembly that can improve electromagnetic compatibility, and use shielded cables for communication lines. Design the following circuits: ① Voltage conversion circuit (DC / DC) and voltage stabilization circuit; ② Battery switching circuit; ③ Battery charge and discharge management circuit. Such as Figure 5 As shown in the figure, the power supply and conversion module design is shown. The voltage conversion circuit and voltage stabilization circuit are shown in Figure 6 As shown in the figure, the system is powered by a 220V AC power supply and supports charging of two lithium batteries, providing backup power to achieve stable output of 24V DC power. The DC power supply converts the 24V voltage into different voltages such as 12V, 5V and 15V through multiple DC / DC conversion modules to provide power support for sensor modules, main control modules and other modules. This design can meet the diverse voltage requirements of different modules, and at the same time has a backup power supply function to ensure the stable operation of the system in the event of power outages, and provide reliable power supply guarantee for multi-module equipment in complex environments.

[0084] The power supply voltage of the sensor detection module is 24V, and an efficient voltage stabilizing circuit is used for voltage conversion. In order to ensure the stable operation of the sensor, a low-power, high-efficiency DC-DC buck converter is designed to adapt to different voltage and current requirements. The STM32 main control module is powered by 3.3V, and the operating voltage range is 2.6V to 3.6V. Considering the complexity of the underground environment, a low-power, high-efficiency STM32 microcontroller was selected, which can operate stably in the temperature range of -40℃ to +85℃. The power module is designed with overload protection and battery power monitoring functions to ensure that the system can continue to provide stable power during long-term operation and avoid system shutdown or data loss due to power problems.

[0085] Battery switching and charging management: The battery design supports automatic switching. When one battery is low on power, the system automatically switches to another battery to ensure that the system is powered on. The battery charge and discharge management circuit design ensures the long life and stability of the battery. Electromagnetic compatibility: In order to ensure the stable operation of the system in the complex electromagnetic environment underground, the platform shell is made of high-quality anti-interference materials and uses shielded wires for communication to reduce the impact of electromagnetic interference.

[0086] Furthermore, in an exemplary embodiment, the host computer monitoring module is also used to set data storage frequency, correct test data, display curves in real time, and output Excel reports.

[0087] The communication module realizes wireless data transmission from underground to the ground through electromagnetic wave transmission and reception, and transmits the data to the PC host computer for monitoring and analysis.

[0088] The host computer monitoring software is the control center of the entire system, responsible for the real-time display, storage, analysis and playback of data; Real-time data acquisition and display: connected to the main control module through electromagnetic wave transmission, real-time sensor data is collected, and the changes of various parameters are displayed in a graphical interface. Data storage and playback: The software can store real-time data locally or in the cloud, and supports the playback and analysis of historical data. Users can set the data storage frequency and view historical data for any time period. Real-time curve and report output: The software supports real-time curve display function, and users can view the changing trends of different parameters at any time. The system also supports exporting measurement data as Excel reports for later analysis and report generation.

[0089] Furthermore, in an exemplary embodiment, the STM32 single-chip microcomputer serves as the main control module of the integrated measurement while drilling data acquisition system suitable for complex drilling conditions, and serves as the control core; the operating temperature range of the STM32 single-chip microcomputer is -40°C-+80°C.

[0090] The platform uses STM32 as the main controller. The STM32 series microcontroller uses a 32-bit processor core, with an operating voltage range of 2.6V to 3.6V, low power consumption, and is suitable for long-term operation. The STM32 microcontroller can meet all functional requirements of the measurement while drilling platform.

[0091] The STM32 microcontroller uses a 32-bit processor core, has strong data processing capabilities and low power consumption, and supports multiple acquisition channels working simultaneously. The main control module has a rich I / O interface, supports a variety of sensor interfaces (including analog and digital signals), can receive real-time processing data from the signal acquisition module, and store the results in the built-in memory or external SD card. The communication with the host computer uses electromagnetic wave transmission communication to ensure real-time data transmission and remote monitoring. The communication protocol design ensures that the data can be seamlessly uploaded to the ground control system for analysis and monitoring.

[0092] With respect to the technical solution of this application, there is currently no other alternative solution that can simultaneously achieve the goals of high integration, multi-parameter real-time acquisition and processing, stable data transmission, and efficient power management proposed in this application in a complex underground environment. Although existing distributed acquisition, single module design, or low-integration solutions can partially achieve similar functions in some aspects, they cannot meet the overall technical level and application requirements of this application in terms of system integration, environmental adaptability, real-time, and stability.

[0093] like Figure 7 As shown, an embodiment of the present application provides an integrated measurement while drilling data acquisition method applicable to complex drilling conditions. The integrated measurement while drilling data acquisition method applicable to complex drilling conditions is as follows.

[0094] Step 101: using a sensor detection module to collect downhole parameters and determine sensor signals; the downhole parameters include temperature, pressure, rotation speed and torsion.

[0095] Step 102: Acquire the sensor signal of the sensor detection module, and transmit the sensor signal to the main control module.

[0096] Step 103: Utilize the main control module to process the sensor signal, and transmit the processed sensor signal to the excitation output module; the main control module includes an STM32 single chip microcomputer.

[0097] Step 104: Utilize the excitation output module to receive and control the processed sensor signal and determine a control signal.

[0098] Step 105: Use the host computer monitoring module to monitor and analyze the control signal to complete the collection, processing and transmission of downhole parameters.

[0099] The innovation of this application is the modular multi-voltage power supply system design, which provides a combination of 220V AC power supply and dual lithium battery power supply, and uses DC / DC conversion module to output multiple voltages (12V, 5V, 15V, etc.) to achieve accurate power supply to different modules and ensure continuous power supply capability in the event of power outage. Multi-channel parameter measurement and automatic identification technology integrates multiple sensors (temperature, pressure, speed, torque, etc.), and uniformly processes sensor signals through parameter and range multi-way switches and signal conversion modules (R / V, V / V, I / V, etc.), realizing automatic identification and real-time measurement of multiple signals. Highly integrated data processing and transmission platform, with STM32 as the core control unit, integrates AD conversion module, data storage module (EMMC, DDR3, SD card), wireless communication module, etc., to achieve efficient data acquisition, processing and real-time transmission, and support remote monitoring and data management under complex working conditions underground. The scalability of modular design, the system has good scalability, can easily access different types of sensors, meet the needs of different application scenarios, and can flexibly adjust the working mode and monitoring parameters through the host computer.

[0100] Based on the above innovations, the integrated measurement while drilling data acquisition system for complex drilling conditions of the present application has the following advantages: the data acquisition platform of the present application can simultaneously collect multiple key parameters such as temperature, pressure, speed, torque, etc., ensure the high accuracy and synchronization of data, and provide comprehensive monitoring for drilling operations. This multi-parameter synchronous acquisition can better reflect the overall status of downhole operations. The data acquisition platform of the present application is equipped with a large-capacity storage module to support long-term data storage, which is convenient for later data playback, analysis and optimization. The playback and trend analysis of historical data can help drilling engineers discover potential equipment problems and operation bottlenecks, and optimize drilling operation plans. The data acquisition platform of the present application adopts a low-power design, equipped with a rechargeable battery and an efficient power management system to ensure long-term stable operation in downhole operations and reduce the risk of equipment downtime due to battery exhaustion. Efficient power management improves the reliability and service life of the platform. The data acquisition platform of the present application adopts a special electromagnetic compatibility design and high-quality shielding materials to ensure the stability of the platform in the complex electromagnetic environment of the well, avoid signal interference affecting data acquisition and transmission, and ensure the reliable operation of the system. The system integration design of the entire measurement while drilling data acquisition platform ensures the orderly coordination and stable operation of each module, and ensures the accuracy, reliability and real-time performance of the data. All modules are reasonably configured according to functional requirements and interconnected through data buses to ensure that the system can operate stably and long-term in the complex environment of the well.

[0101] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. An integrated measurement while drilling data acquisition system suitable for complex drilling conditions, characterized in that: The integrated measurement while drilling data acquisition system suitable for complex drilling conditions includes: A sensor detection module, used to collect downhole parameters and output sensor signals; the downhole parameters include temperature, pressure, rotation speed and torsion; A signal acquisition module, used to acquire the sensor signal output by the sensor detection module and transmit the sensor signal to the main control module; A main control module, used for processing the sensor signal and transmitting the processed sensor signal to the excitation output module; the main control module includes an STM32 single chip microcomputer; An excitation output module, used to receive and control the processed sensor signal and determine a control signal; The host computer monitoring module is used to monitor and analyze the control signal and complete the collection, processing and transmission of downhole parameters.

2. The integrated measurement while drilling data acquisition system suitable for complex drilling conditions according to claim 1, characterized in that: Sensor detection module, specifically including: pressure sensor, torsion sensor, speed sensor, signal conditioning circuit, A / D converter and temperature sensor; The output ends of the pressure sensor, the torsion sensor and the rotation speed sensor are connected to the signal conditioning circuit; the pressure sensor, the torsion sensor and the rotation speed sensor output analog signals through the signal conditioning circuit; The signal conditioning circuit is connected to the A / D converter; the output end of the A / D converter is connected to the GPIO pin of the STM32 microcontroller; The temperature sensor and the STM32 microcontroller are connected to the 2 C bus interface; the temperature sensor is used to 2 C bus output digital signal; the STM32 single chip microcomputer is used for the A / D converter or I 2 The C bus receives the analog signal and the digital signal, and processes and stores the analog signal and the digital signal; the sensor signal includes the analog signal and the digital signal.

3. The integrated measurement while drilling data acquisition system suitable for complex drilling conditions according to claim 2, characterized in that: The signal conditioning circuit is used to process the analog signal and convert the processed analog signal into a digital signal according to the A / D converter; the processing includes amplification processing and filtering processing.

4. The integrated measurement while drilling data acquisition system applicable to complex drilling conditions according to claim 2, characterized in that: The integrated measurement while drilling data acquisition system suitable for complex drilling conditions also includes: a conversion module; The conversion module is connected to the A / D converter and is used to convert the downhole parameter into a voltage signal; the A / D converter is used to convert the voltage signal into a digital signal.

5. The integrated measurement while drilling data acquisition system applicable to complex drilling conditions according to claim 2, characterized in that: The signal acquisition module specifically includes: The integrated measurement while drilling data acquisition system suitable for complex drilling conditions includes multiple acquisition channels; the acquisition channels support bidirectional I 2 C bus communication, used to exchange information with the sensor modules and components; the acquisition channel can automatically detect the connection status of the sensor and identify the sensor signal; the sensor data includes type, serial number, calibration data and calibration date; The information collection module is implemented by I 2 C bus access to the STM32 MCU, each connected to the I 2 The sensors on the C bus have unique addresses, and the data of the sensors are transmitted to the STM32 microcontroller to identify the signal type of the sensors.

6. The integrated measurement while drilling data acquisition system applicable to complex drilling conditions according to claim 1, characterized in that: The excitation output module is also used to power strain gauges, external signal conditioning equipment, and pressure control equipment and is pre-programmed; The adjustable voltage output terminal of the excitation output module is connected to the power input terminal of the strain gauge to provide a power supply voltage for the strain gauge; The adjustable current output terminal of the excitation output module is connected to the power input terminal of the external signal conditioning device, and is used to provide a stable current source for the external signal conditioning device; The adjustable voltage output terminal of the excitation output module is connected to the power input terminal of the pressure control device to provide a working voltage for the pressure control device.

7. The integrated measurement while drilling data acquisition system applicable to complex drilling conditions according to claim 1, characterized in that: The integrated measurement while drilling data acquisition system suitable for complex drilling conditions also includes a power supply and conversion module; The power supply and conversion module is used to provide stable power supply for each module; each module includes the sensor detection module, the signal acquisition module, the main control module, the excitation output module and the host computer monitoring module.

8. The integrated measurement while drilling data acquisition system applicable to complex drilling conditions according to claim 1, characterized in that: The host computer monitoring module is also used to set data storage frequency, correct test data, display curves in real time and output Excel reports.

9. The integrated measurement while drilling data acquisition system applicable to complex drilling conditions according to claim 2, characterized in that: The STM32 single-chip microcomputer serves as the main control module of the integrated measurement while drilling data acquisition system suitable for complex drilling conditions and as the control core; the operating temperature range of the STM32 single-chip microcomputer is -40°C to +80°C.

10. An integrated measurement while drilling data acquisition method suitable for complex drilling conditions, characterized in that: The integrated measurement while drilling data acquisition method applicable to complex drilling conditions applies the integrated measurement while drilling data acquisition system applicable to complex drilling conditions described in claims 1-9, and the integrated measurement while drilling data acquisition method applicable to complex drilling conditions includes: Using the sensor detection module to collect downhole parameters and determine sensor signals; the downhole parameters include temperature, pressure, rotation speed and torsion; Acquire the sensor signal of the sensor detection module, and transmit the sensor signal to the main control module; The main control module is used to process the sensor signal, and the processed sensor signal is transmitted to the excitation output module; the main control module includes an STM32 single chip microcomputer; Using the excitation output module to receive and control the processed sensor signal and determine a control signal; The control signal is monitored and analyzed by the host computer monitoring module to complete the acquisition, processing and transmission of downhole parameters.

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