190 results about "Measurement while drilling" patented technology

The invention relates to the technical field of unconventional oil-gas exploration, and discloses a well-seismic integrated horizontal well geosteering risk evaluation method, which comprises the following steps: S1, acquiring three-dimensional seismic data, measurement while drilling data and geological logging data through a well-seismic integrated data acquisition platform; s2, constructing a horizontal well geosteering dynamic model based on multi-source heterogeneous data, and integrating a seismic inversion result and real-time drilling parameters; by establishing a well-seismic data dynamic fusion mechanism and a multi-source risk quantification model, the problem of space-time dislocation of seismic inversion and measurement-while-drilling data is solved, the recognition precision of a fault boundary, a lithologic interface and a pressure abnormal zone is ensured to be matched with drilling position changes in real time, risk misjudgment caused by model updating lag in a traditional method is eliminated, and the accuracy of the method is improved. The accuracy and timeliness of geosteering decision making of the complex structure area are improved; by monitoring well track deviation and geological model prediction deviation in real time, the risks of well wall instability and target deviation are avoided, and the operation safety of the horizontal well in the full life cycle is guaranteed.

The invention relates to the technical field of coal mine gas disaster prediction, in particular to a while-drilling sensing coal face gas danger area division method which comprises the following steps: S1, in a detection drill hole drilling process of a coal face, detecting the gas danger area of the coal face; the method comprises the following steps: synchronously acquiring three types of parameters: direct gas parameters, drilling kinetic parameters and hole wall geophysical parameters through a measurement-while-drilling system; the measurement while drilling system comprises a sensor array arranged on a drilling tool and a data transmission module communicating with a ground data processing system. S2, performing space-time alignment and fusion analysis on the multi-source parameters acquired in the step S1, and adopting a mode recognition method based on mutation point detection and multi-parameter association; through multi-source information fusion and dynamic coupling modeling, accurate identification and graded early warning of a gas dangerous area are realized, the detection precision and early warning timeliness are improved, and a closed-loop prevention and control system integrating perception, evaluation and management and control is formed.

A while-drilling acoustic auto-tracking wellbore tool and a method for using same. The tool comprises: a power generation and communication system (100), which comprises a power generation system and a communication system, wherein the communication system is used for bidirectional transfer of measurement data and a control instruction; a power and measurement and control system (200), which comprises a measurement while drilling system, wherein the measurement while drilling system is used for measuring inclination and azimuth data of a newly drilled borehole, and transmitting the data to the communication system; and an acoustic measurement and guidance system (300), which comprises an acoustic emission and measurement and control system, wherein the acoustic emission and measurement and control system is used for emitting an acoustic signal in the newly drilled borehole, receiving a return signal and transmitting the return signal to the communication system. The solution solves the difficult problems of communicating a newly drilled well and an old borehole, determining the distance between a drill bit and the old borehole in real time, etc. The acoustic emission and measurement and control system emits the acoustic signal in the newly drilled borehole, receives the return signal and transmits the return signal to the communication system, and the position of a wellbore is dynamically scanned and monitored in an acoustic while-drilling manner, thereby achieving the aim of performing measurement while drilling.

The invention provides a regulation and control method and system for hole wall instability of a horizontal drill hole in a high ground stress environment, and belongs to the technical field of horizontal drilling. The method comprises the steps that a high ground stress hole wall instability model based on elastic-plastic damage mechanics is established, and a high ground stress correction coefficient, a dynamic damage variable and a multi-field coupling equation are introduced into the model; model parameters are corrected in real time based on measurement while drilling data, and the hole wall stability is dynamically predicted; according to the prediction result, the model prediction error can be greatly reduced through the method, the progressive damage process of the rock mass in the high ground stress environment can be accurately described, and the technical problem of inaccurate prediction of a traditional static model is solved. By correcting model parameters in real time and dynamically adjusting a wall protection strategy, the hole wall instability accident rate is reduced, and the drilling operation safety is remarkably improved.

The invention provides an underground drilling working condition identification method and device based on data driving. The method comprises the following steps: before underground drilling, introducing contribution values to quantify the importance of different working condition characteristics, and carrying out interpretability analysis on the output of a working condition classifier of each working condition; a judgment matrix of each working condition is constructed according to contribution values of different working condition characteristics to each working condition, so that a weight vector of each working condition is obtained, and a data-driven objective weight distribution method is established; during underground drilling, underground measurement while drilling data are collected, and underground drilling parameter data can be directly obtained; according to the weight vector of each working condition and the working condition index value of each working condition, the working condition of each window is decided through multi-classifier fusion; and when a preset number of different working conditions are accumulatively output every time, updating the feature vector of each window and the working condition index threshold value of each working condition, and establishing a dual dynamic updating strategy pair to adapt to a complex and changeable drilling environment. According to the method, the accuracy and the real-time performance of working condition identification are improved.

The invention relates to an underground multi-mode overflow monitoring system and method, and belongs to the technical field of well drilling monitoring, the system is arranged in an axial through hole of a drill collar body, and the system comprises a central fluid channel assembly comprising a Venturi tube section communicated with the through hole; the annular sensor array assembly comprises a barrel which is arranged on the outer side of the Venturi tube section in a sleeving mode and attached to the inner wall of the drill collar body, an annular flow channel is formed in the position, corresponding to a high-pressure area of the Venturi tube section, in the barrel, one end of the annular flow channel is closed, and the other end of the annular flow channel is a Venturi drainage ejector communicated to the high-pressure area of the Venturi tube section; the annular flow channel is provided with a plurality of drainage channels, and the annular flow channel is provided with a multi-mode sensor along the circumferential inner wall of the annular flow channel; a plurality of sampling holes communicated with the drainage channel are formed in the drill collar body; the system further comprises a processor, all the sensors are connected with the processor, and the processor communicates with the measurement-while-drilling system. The method and the device have the effect of improving the stability of monitoring work in a complex drilling environment.

The invention discloses a real-time guiding control system and method for a borehole track of a wireless measurement-while-drilling instrument, and belongs to the technical field of drilling engineering.The real-time guiding control method comprises the steps that the wireless measurement-while-drilling instrument collects borehole attitude data and environmental factor data, and fusion data is generated; based on the fusion data and the historical guiding effect data, generating adaptive control parameters through an adaptive learning mechanism; performing channel adaptation processing and dynamic compensation on the adaptive control parameter to generate a compensation control signal; the compensation control signal is used for controlling the operation posture of the guiding tool, the deviation between the actual well track data and preset target well track data is calculated, and track deviation data is generated; and learning parameters of the adaptive learning mechanism are updated based on the trajectory deviation data. Multi-source data fusion perception, intelligent decision based on a self-adaptive learning mechanism, dynamic compensation communication of channel adaptation and closed-loop feedback updating based on trajectory deviation are adopted, and real-time guiding control over the well trajectory can be achieved.

The invention discloses a digital twinning-based intelligent control system and method for butt-joint drilling of a horizontal well penetrating through a goaf coal pillar, and relates to the technical field of drilling and coal mine safety. The system comprises a data acquisition and transmission module for acquiring and transmitting multi-source heterogeneous data of a to-be-drilled goaf; the digital twinning module constructs a digital twinning model; the while-drilling perception and dynamic risk assessment module is used for acquiring and processing while-drilling measurement data and fusing the data with digital twinborn model data to generate a visual dynamic risk field; the intelligent decision and control module is used for generating a safe drilling path and a drilling parameter control instruction; the execution and well control module executes the control instruction and regulates and controls drilling equipment and a well control device; and the man-machine interaction module is used for displaying the risk information and realizing man-machine According to the method, the conversion of drilling safety from passive response to active prediction and intelligent control is realized, and the safety and the success rate of drilling operation penetrating through the goaf coal pillar are improved.

The invention relates to the technical field of underground measurement-while-drilling data transmission, in particular to an electromagnetic wave mode-while-drilling conversion relay transmission method and system. The method comprises the following steps: acquiring measurement data and transmitting a signal through a double-insulation controlled dipole transmitting structure; receiving the measurement data signal through a repeater arranged along the drill string; determining an equivalent emission impedance characteristic by outputting a detection signal to an external medium and collecting an output end voltage and a current effective value; receiving a propagable guidance response formed by the measurement data signal; judging the type of the current well section based on the equivalent emission impedance characteristic and the propagable guide response; switching to a casing guide injection path or an open hole coupling injection path is selected according to the type of the well section; and carrying out relay forwarding on the signal based on the corresponding emission parameter group. Intelligent identification and conversion of signal modes are achieved, the relay transmission success rate and stability of cased well measurement data signals are improved, the link building distance is shortened, and power consumption and risks caused by working condition uncertainty are reduced.

In one embodiment, a method is disclosed for using a trained machine learning model to classify mud pulse signals. The method may include receiving a mud pulse signal from a measurement while drilling (MVWD) tool, wherein the mud pulse signal includes data. The method may also include decoding, using the trained machine learning model, the data to determine a value of the data, and providing a user interface comprising the value of the data for presentation on a computing device of a user.

The present application belongs to the technical field of oil and gas drilling equipment, and particularly relates to a double-period QPSK continuous wave signal detection method, aiming at solving the problem that the prior art cannot accurately detect and identify drilling fluid pulse signals. The method comprises: collecting a drilling fluid continuous pressure wave QPSK output signal as a measurement-while-drilling signal; wavelet-decomposing the measurement-while-drilling signal to obtain a noisy drilling fluid pulse signal and a noise signal; combining the noise signal, and filtering the noisy drilling fluid pulse signal through a pre-constructed RBF neural network nonlinear adaptive filter to obtain a noise-filtered drilling fluid pulse signal. The present application realizes accurate detection and identification of drilling fluid pulse signals.

The application discloses a measurement-while-drilling device, which is connected between an upper drill collar and a lower drill collar of a drilling device, and comprises a directional sub, a circulation sleeve and a pulse signal generator. A first flow channel is formed in the upper drill collar, a second flow channel is formed in the directional sub, and a third flow channel is formed in the lower drill collar; the first flow channel, the second flow channel and the third flow channel are sequentially communicated. The circulation sleeve is arranged in the second flow channel, and a displacement adjusting channel is formed in the circulation sleeve along the length direction of the second flow channel; a flow limiting ring for circulating drilling fluid is arranged in the displacement adjusting channel. The pulse signal generator comprises a sleeve and a pressure regulating rod assembly movably arranged in the sleeve. The sleeve is partially arranged in the first flow channel, and one end of the sleeve is fixed in the displacement adjusting channel. The end of the pressure regulating rod assembly can extend into the displacement adjusting channel along the length direction of the sleeve. The application realizes the adjustment of the circulating area of the drilling fluid, so that the device can be applied to the working condition with larger displacement of the drilling fluid.

A directional drilling tool for establishing and verifying the high-side orientation of downhole motors relative to measurement-while-drilling (MWD) systems. The tool comprises a fluorescent, lightweight, drillable plastic bracket with an arcuate body that snaps onto tubular components such as downhole motors and drill collars. A radially extending rod provides accurate visual alignment of the motor high side. The tool's flexible, non-hazardous material maintains attachment under rig-floor impacts while enhancing safety for personnel and downhole equipment. It is suitable for whipstock operations and other directional drilling procedures requiring reliable high-side reference.

The application discloses a kind of mine roadway surrounding rock fissure rock mass bearing capacity detection equipment with drilling, and the application relates to the technical field of coal mine drilling survey, including drill rod, one end of the drill rod is provided with comprehensive drilling bit, water inlet pipe is arranged in the drill rod, and the water inlet pipe is used to supply water to the inside of comprehensive drilling bit, the inside of the drill rod is also provided with detection mechanism, the detection mechanism includes: pressure storage tank, one side of the pressure storage tank is fixedly connected with first connecting pipe, the first connecting pipe is fixedly connected with the output end of water pump at the end away from the pressure storage tank, the present application is provided with pressure detection module, flow rate detection module and high-frequency dynamic pressure sensing module, and combined with multi-parameter synchronous acquisition and coupling analysis, the pressure decay characteristic, flow change characteristic and transient pressure response characteristic can be obtained simultaneously, so as to construct surrounding rock fissure equivalent permeation response parameter, with the advantages of realizing the continuous acquisition of surrounding rock fissure permeation characteristic and its spatial distribution.

This invention belongs to the field of vertical shaft blasting excavation construction control technology, and particularly relates to a vertical shaft excavation method that coordinates boundary pipe curtain pre-support with internal weak blasting. The method first delineates the vertical shaft boundary and defines the excavation area. A guide hole is excavated at the center of the area and enlarged to construct a central initial shaft. A rotating magnetic field probe that can move up and down along the axis is installed inside the shaft. During the drilling of the guide hole, the deviation is controlled by an electromagnetic drilling-while-drilling measurement system. Then, grouting holes are excavated along the vertical shaft boundary, and unstable strata sections are simultaneously sampled, identified, and reinforced. At the same time, a retaining structure is constructed to form an edge support system. Subsequently, starting from the central initial shaft, multiple annular blasting areas are divided and marked from the inside out. Blasting holes are laid in each area, and blasting is carried out sequentially from the inside out, satisfying the free face compensation space criterion. Finally, locally unstable areas on the inner wall of the vertical shaft are reinforced in real time, and a permanent lining structure is constructed. This method achieves multi-process coordination, improving the safety and forming quality of vertical shaft excavation.

The invention relates to the technical field of petroleum drilling tools, in particular to a measurement-while-drilling nipple which comprises an upper cover, a lower cover, a core pipe, an outer cylinder, a bit pressure, torque and bending moment composite sensor, an inner temperature and pressure sensor, an outer temperature and pressure sensor, a power generation unit, a processing unit and a storage unit. And an outer cylinder is arranged outside the core tube. The device is reasonable and compact in structure, when the device is used, the measurement-while-drilling short section is installed at the position close to a drill bit, in the drilling process, the inner temperature and pressure sensor and the outer temperature and pressure sensor collect temperature and annular pressure information, bit pressure and drill rod deformation can be transmitted to the measurement-while-drilling short section, bit pressure, bending moment and torque information can be measured by measuring deformation of the core pipe, and the device is convenient to use. And the power generation unit enables the measurement-while-drilling nipple to have an autonomous endurance function, so that the transmission power of the processing unit can be properly increased, and the clearness and the accuracy of information are ensured.

The invention relates to the field of resistivity measurement, in particular to a while-drilling resistivity measurement device and a resistivity imaging method. A two-end type shielding electrode structure is adopted, the shielding capacity is optimized through numerical simulation, and the instrument detection depth is increased. The modularized detector can be flexibly installed, can also work independently and is convenient to install and maintain, and the measuring device can measure the formation resistivity and can also obtain the oil-based mud resistivity in real time. The problem that the accuracy of a final result is seriously influenced due to the fact that the oil-based mud resistivity cannot be independently obtained in the prior art is solved.

The invention discloses a multi-module cooperative work control method and system for a wireless measurement-while-drilling instrument, and belongs to the technical field of drilling engineering.The method comprises the steps that real-time state data and drilling environment parameters of all modules are obtained; performing parameter integration on the real-time state data and the drilling environment parameters to generate a state parameter set; carrying out comprehensive analysis processing on the state parameter set, generating dynamic priorities through a dynamic priority calculation algorithm, and generating a priority sequence according to the arrangement of the dynamic priorities; generating a task scheduling instruction including a resource allocation strategy and a task execution time sequence according to the priority sequence; and executing the task scheduling instruction, collecting execution result data of each module, and using the execution result data to adjust a dynamic priority calculation algorithm to form an optimized scheduling strategy. According to the method, the multi-source data fusion and dynamic priority calculation technology is adopted, a closed-loop feedback optimization mechanism is combined, and cooperative scheduling and resource optimization of all modules of the wireless measurement-while-drilling instrument can be achieved.

The disclosure describes a BHA that generates electricity downhole which can then be utilized with an electric motor to turn the drive shaft and for drive shaft orientation. The disclosure also describes a more accurate MWD measurements by placing MWD sensors closer to drill bit.

The present application relates to the technical field of oil drilling tools, and discloses a drilling measurement sub, which comprises an upper cover, a lower cover, a core pipe, an outer cylinder, a drilling pressure and torque and bending moment composite sensor, an inner temperature and pressure sensor, an outer temperature and pressure sensor, a power generation unit, a processing unit and a storage unit, the lower side of the upper cover is fixedly provided with the core pipe, the lower end of the core pipe is fixedly provided with the lower cover, and the outer side of the core pipe is provided with the outer cylinder. The drilling measurement sub has a reasonable and compact structure, is installed near a drill bit during use, and collects temperature and annular space pressure information through the inner temperature and pressure sensor and the outer temperature and pressure sensor during drilling. Drilling pressure and drill pipe deformation are transmitted to the drilling measurement sub, drilling pressure, bending moment and torque information can be measured through the deformation of the core pipe, and then transmitted to the processing unit through a wire. The power generation unit enables the drilling measurement sub to have an autonomous cruising function, so that the transmission power of the processing unit can be appropriately increased, and the clarity and accuracy of information can be ensured.

The application provides a high-temperature drift compensation method and system for a resistivity signal while drilling, and belongs to the technical field of measurement while drilling. The method comprises the following steps: functionally dividing a resistivity measurement system while drilling to construct a set of sensing link nodes; injecting a temperature-sensitive disturbance excitation signal into the resistivity measurement system while drilling to obtain a composite excitation signal set, and extracting a multi-dimensional response observation vector of the composite excitation signal set; establishing a temperature-sensitive mapping relationship matrix of the set of sensing link nodes and the multi-dimensional response observation vector; adaptively calculating the number of decoupling compensation channels of the temperature-sensitive mapping relationship matrix to obtain the number of decoupling compensation channels; and constructing a multi-channel decoupling compensation model for compensating and fusing the original resistivity signal of the resistivity measurement system while drilling. Through fine modeling and channel-by-channel compensation of the temperature drift of each node of the sensing link, residual drift error is effectively reduced, and the resistivity measurement accuracy while drilling is improved.

The application discloses a geological exploration intelligent drilling control method, system, device and storage medium, belongs to the technical field of geological exploration and intelligent drilling engineering, adopts an adaptive optimization strategy to dynamically adjust a measurement-while-drilling system collection parameter, synchronously collects drilling multi-source while-drilling data, carries out space-time synchronous preprocessing and multi-source cross-domain feature fusion on the multi-source data, constructs a global fusion feature vector, inputs the feature vector into a pre-trained stratum identification and risk prediction model, and outputs real-time stratum lithology, drilling risk and target area deviation information; drilling technology and trajectory parameters are synchronously adjusted according to the information, the inference accuracy and the computing power configuration of the model are dynamically adjusted, the intelligent drilling closed-loop control is completed, the sampling frequency, the range, the channel configuration and the transmission bandwidth of the measurement-while-drilling system can be dynamically and linkage-adjusted, and the whole-process autonomous intelligent control of deep complex stratum drilling is realized.

The application relates to an intelligent prediction system and method for gas overrun at a coal roadway tunneling working face, which comprises a data acquisition system (single-hole gas precision measurement and ground stress measurement while drilling), a gas concentration analysis module, a ground stress analysis module and a gas overrun early warning module; the method extracts gas monitoring data in a time period before the current time and ground stress measurement while drilling monitoring data of a coal seam roof rock stratum by real-time acquisition of gas concentration and ground stress data while drilling at the coal roadway tunneling working face M t and the current time T 1 , T 2 ; calculates gas monitoring indexes N t , P t ; calculates ground stress monitoring indexes; when the indexes N t are greater than threshold values N 0 , short-term gas overrun early warning is performed; when the gas monitoring data M t is greater than a threshold value M 0 or the ground stress monitoring data Z is greater than a threshold value α 0 , emergency gas overrun early warning is performed. The application realizes dynamic intelligent early warning for gas overrun at the coal roadway tunneling working face, and effectively guarantees the safety production of the coal mine.

This invention belongs to the field of natural gas extraction technology in deep thin coal and rock formations. It discloses a directional anti-sticking drill string assembly and drilling method for horizontal wells in deep thin coal and rock formations. A closed-loop control system is formed between the drill bit trajectory control mechanism and the wellbore dressing and anti-sticking mechanism, encompassing near-bit high-precision sensing, real-time data transmission while drilling, surface analysis feedback control, active downhole directional correction, and synchronous wellbore dressing and protection. Multi-directional gamma sensors positioned near the drill bit provide high-resolution formation information; the bend structure of the downhole power drill string provides the direction of the wellbore trajectory; the non-magnetic bearing section ensures the stability of measurement while drilling and the reliability of communication; the surface control unit enables real-time decision-making and trajectory correction; and the wellbore dressing and anti-sticking mechanism simultaneously improves wellbore stability and cuttings carrying capacity. This significantly enhances the drilling throughput and resistance to coal seam collapse in complex sections of thin coal and rock formations while ensuring trajectory controllability, reducing the risk of sticking due to wellbore instability and cuttings accumulation.

The invention discloses a measuring rod and an over-drill-bit measurement-while-drilling device and method. The measuring rod is provided with at least three expansion jackets at intervals in the radial direction, and any two expansion jackets and at least one part of the underground side wall form a measuring cavity after expansion. A liquid injection hole is formed in the part, in the measuring cavity, of the measuring rod, and a liquid injection channel communicated with the liquid injection hole is formed in the measuring rod in the radial direction; the measuring rod is provided with a measuring cabin between two adjacent expansion jackets, and the measuring cabin is at least integrated with a pressure sensor and a neutron detection assembly; the pressure sensor is used for collecting the pressure in the measuring cavity; the neutron detection assembly is used for measuring stratum parameters in the measurement cavity in a pressurized state. The multiple expansion jackets are used for forming the measuring cavities with different lengths so as to eliminate sealing failure caused by irregular borehole diameters, or the multiple expansion jackets are used for forming the multiple spaced measuring cavities so as to reduce the trust risk of a single data source, and a pressure sensor, neutron detection and the like are used for measuring stratum data in a pressurized environment.

The application discloses a kind of probability model construction method and system for tunnel engineering geology risk discrimination, it is related to data analysis processing technical field.The following steps are included:S1, according to the preset paragraph length along tunnel axis, tunnel is divided into several sections, in each section, at least one method is used in drilling while drilling measurement, machine vision scanning, advanced geological prediction, the surrounding rock characteristic parameter of the section is obtained.The present application simultaneously establishes the prior probability model of three main geological risks of collapse, gushing water and surrounding rock large deformation, and the overall probability of at least one disaster is calculated through the correlation coefficient correction joint probability formula, compared with the prior art only for single gushing water risk discrimination, the coupling effect of multiple risks coexistence can be quantified, the comprehensive danger degree of paragraph is truly reflected, and the problem that single risk assessment easily leads to insufficient measures is solved.

The present application relates to the field of measurement while drilling technology, and more particularly to a method, system and electronic device for improving the measurement accuracy of data while drilling, the method comprising: obtaining the attitude angle of the drill string at the current time by using a MEMS three-axis accelerometer and a MEMS three-axis gyroscope, wherein the MEMS three-axis accelerometer and the MEMS three-axis gyroscope are both installed on the drill string; calculating the error compensation value corresponding to the attitude angle of the drill string at the current time; and compensating the attitude angle of the drill string at the current time by using the error compensation value corresponding to the attitude angle of the drill string at the current time, to obtain the final attitude angle of the drill string at the current time. The installation error of the MEMS three-axis accelerometer and the MEMS three-axis gyroscope installed on the drill string, the angle random walk error and the zero drift error can be reduced, and the measurement accuracy of the data while drilling, i.e. the attitude angle of the drill string, can be improved.

The invention discloses an underground coal mine near-bit multi-parameter measurement-while-drilling system, which belongs to the technical field of coal mine drilling and comprises a drilling data acquisition module for acquiring underground coal mine near-bit multi-parameter real-time data; the drilling data transmission module is used for transmitting and sharing coal mine underground near-bit multi-parameter real-time data; and the multi-parameter measurement-while-drilling platform is used for processing, analyzing, measuring and displaying the coal mine underground near-bit multi-parameter real-time data and dynamically presenting a coal mine underground near-bit multi-parameter measurement-while-drilling result. According to the invention, the problem of poor coal mine drilling effect caused by incapability of real-time measurement while drilling and drilling adjustment of multiple parameters of a coal mine underground near-bit is solved. According to the invention, real-time measurement while drilling can be carried out on multiple parameters of the coal mine underground near-bit in the drilling process, so that an operator can carry out real-time drilling adjustment according to a real-time measurement result, the coal mine drilling effect can be improved, and the mining efficiency and the safety risk of a coal mine can be effectively controlled.

The present application discloses a method for frequency identification of a measurement while drilling signal, which relates to the technical field of signal processing. The method comprises the following steps: s ( t ) and noise n ( t ) input a high-order bistable stochastic resonance system; transform the damping coefficient, system parameters and system output response in the high-order bistable stochastic resonance system to obtain an equivalent equation; detect the noise intensity D Is it consistent with the signal to be tested? s ( t ) matches, if it matches, the signal is output directly and the signal to be tested is restored s ( t If the frequency does not match, the parameters of the high-order bistable stochastic resonance system are adjusted according to the parameter adjustment rules. This application solves the problem that the useful signal may be damaged or even unrecognizable during filtering.

The invention discloses a multi-parameter fusion rock stratum fracture method based on measurement of parameters while drilling of a down-the-hole drill, and relates to the technical field of mining machinery. Comprising the following steps: in the drilling process of a down-the-hole drill, acquiring a measurement-while-drilling parameter, a borehole peeping image and a rock mass acoustic wave velocity; calculating the change rate of adjacent rock stratum structures, and judging the change positions of the rock stratum structures according to standards; respectively calculating local variable coefficients of the axial force and the drilling speed, and constructing a rock mass fracture index by combining the axial force variance, the drilling speed variance and the weight coefficient; and based on the measurement-while-drilling parameters, the borehole peeping image, the rock mass acoustic wave velocity and the rock mass fracture index, a fracture recognition model is constructed, and rock mass integrity judgment is completed by combining a strength judgment module. The method aims at determining the rock stratum fracture according to the real-time while-drilling parameters of the field down-the-hole drill, the drilling parameters in the drilling process can be accurately obtained in real time by means of the developed while-drilling system, the drilling specific energy of the down-the-hole drill is analyzed, and therefore the integrity index of the rock mass is determined.