314 results about "Drilling engineering" patented technology

The invention discloses a directional drilling track accurate control technology based on machine learning, and relates to the technical field of drilling engineering. The directional drilling track accurate control technology comprises the following steps that underground parameters of a drilling tool during underground operation are obtained; establishing a dynamic model based on the drilling tool structure and the motion state; based on the dynamic model, introducing a long-short-term memory neural network, and constructing a hybrid prediction model; drilling parameters are input into the hybrid prediction model, and trend information of multiple tracks is output; based on current geological conditions, drilling tool configuration and operation safety constraints, performing simulation evaluation on the trend information of the plurality of candidate tracks, and screening out an optimal track meeting track precision and underground safety requirements from the candidate tracks; based on the optimal track, control strategy input is constructed, and a state space containing a tool face angle, target azimuth deviation and a drilling tool state is set; and through a deep reinforcement learning method, an advanced adjustment instruction for the guiding tool is generated, and drilling operation is executed according to the optimal track and the advanced adjustment instruction.

The invention provides a tunnel three-dimensional geologic body modeling method and system based on in-hole camera shooting and while-drilling lithology perception, and relates to the technical field of tunnel and underground engineering and intelligent geological information processing.The method comprises the steps that firstly, a drill hole wall optical image sequence and while-drilling engineering parameters are synchronously collected and preprocessed respectively; then establishing a depth-time mapping relation to realize accurate alignment of the multi-source data in a depth domain; then fracture intelligent identification and parameter extraction are realized through an improved U-Net network, and lithology classification is completed by using an XGBoost model; feature level and decision level fusion is carried out on the fracture features and the lithologic features, and rock mass quality grades are generated; and finally, constructing an integrated geologic model fusing lithologic distribution and a three-dimensional fracture network by adopting an implicit modeling and discrete fracture network technology. According to the method, the problem of splitting of in-hole visual information and while-drilling physical information is solved, automation and precision of geological recognition are improved, and reliable geological information support is provided for tunnel construction safety and support design.

The invention discloses a lithofacies intelligent identification method, device and equipment, a medium and a program product, and the method comprises the steps: building a sample data set through logging parameters, drilling parameters and historical drilling data corresponding to lithofacies labels, screening out a feature subset for modeling based on correlation analysis, and building a lithofacies identification model based on a Transform neural network; and training the constructed lithofacies identification model by using the sample data set to obtain an optimized lithofacies identification model, inputting the feature subset of the well to be identified into the optimized lithofacies identification model, and outputting a lithofacies prediction result of a corresponding depth. The intelligent lithofacies identification method relies on the Transform model, has high identification precision, high automation degree and strong generalization ability, can effectively integrate two types of information of logging data and drilling engineering data, provides a more comprehensive basis for lithofacies judgment, and can meet the requirement of real-time lithofacies identification while drilling.

The invention discloses a high-temperature-resistant and high-pressure-resistant autonomous deep well pressure maintaining sampler, and belongs to the technical field of drilling engineering sampling. The sampler comprises an upper joint, a control outer pipe, an end cover, a valve body and a liquid storage chamber which are connected in sequence, an electromagnet is arranged on the outer side of the end cover; an electric control module is arranged in the control outer pipe; a valve element with a permanent magnet is arranged in the valve body in a sliding mode, the valve element is driven to move axially through non-contact electromagnetic force between the electromagnet and the permanent magnet, and opening and closing of the sampling flow channel are achieved. The bottom of the valve core is provided with a valve core inner channel communicated with the sampling flow channel and the liquid storage chamber and a one-way valve; a sampling inlet channel is formed in the joint of the end cover and the valve body. According to the invention, a pure mechanical sealing-based structure is adopted, so that the sealing reliability and the operation stability in a high-temperature and high-pressure environment of a deep well are remarkably improved, drilling fluid is not needed, and efficient and pressure-maintaining sampling of in-situ formation fluid is realized.

The invention belongs to the technical field of petroleum and natural gas drilling engineering, and relates to a rotary steering test method and system for simulating underground drilling fluid circulation in a workshop. The method comprises the following steps: firstly, determining a dynamic fingerprint and a tolerance band of a circulation channel of a target well section, wherein the dynamic fingerprint comprises a time domain step and a frequency domain phase index; constructing a test loop of a series-connected adjustable hydraulic dynamic equivalent module, wherein the module comprises a containing cavity, a throttling unit and an inertia pipe unit to regulate and control flexibility, damping and inertia; applying flow disturbance and collecting flow pressure data to obtain a current dynamic fingerprint; comparing the tolerance band to iteratively adjust module parameters until the fingerprint reaches the standard; and after locking the parameters, carrying out function testing. The problem that traditional testing is disjointed with underground working conditions can be solved, testing accuracy and reliability are improved, testing cost is reduced, and testing requirements of different well sections are met.

The invention relates to the technical field of petroleum drilling engineering, and particularly discloses a drilling plugging agent as well as a preparation method and application thereof. According to the plugging agent, nano silicon dioxide and graphene oxide serve as a composite matrix, and the well drilling plugging agent with excellent dispersion stability, compact plugging performance, temperature resistance, salt resistance and reservoir friendliness is obtained through silane coupling agent graft modification and polymer copolymerization composite modification. The technical defects that an existing nano plugging agent is prone to agglomeration, poor in compatibility with drilling fluid, insufficient in extreme working condition resistance and the like are overcome, the preparation process is simple and controllable, the cost is relatively low, the plugging agent can be added into water-based or oil-based drilling fluid according to the mass ratio of 0.5-5%, the plugging agent is suitable for shale, deep high-temperature high-pressure high-salt complex stratums and the like, a compact plugging layer can be formed, and the plugging effect is good. Shale micro-cracks and deep stratum large cracks are effectively blocked, and the problems that a traditional blocking agent is prone to agglomeration, poor in extreme working condition resistance and the like are solved.

The present application relates to the field of logging while drilling and intelligent steering control technology in oil and gas drilling engineering, in particular to a rotary steering drilling adaptive trajectory control method for image processing. It comprises: receiving original logging while drilling image data frames of downhole transmission channels; generating a high-resolution predicted geological texture map; synchronously generating a feature uncertainty distribution map representing the pixel probability distribution characteristics in the high-resolution predicted geological texture map; calculating the matching degree of the high-resolution predicted geological texture map and a preset stress-induced artifact feature library; generating a sensor contamination marker signal; calling a safety baseline geological model constructed before drilling; calculating the geological texture structure difference value relative to the safety baseline geological model; generating a geological illusion entropy; receiving the geological illusion entropy and the sensor contamination marker signal; and driving a downhole steering tool according to the activated mode. The present application ensures that the steering instruction is always based on the real existing geological information, and avoids the deviation of the drilling trajectory caused by the fictitious texture.

The invention discloses a geothermal resource assessment method and system based on big data analysis, and is applied to the technical field of digital analysis. The method comprises the following steps of obtaining multi-source heterogeneous data of historical drilling engineering, performing data preprocessing and feature engineering, and establishing a drilling success probability intelligent prediction-risk quantification model; in combination with geospatial information and environmental multi-source data, identifying an earth surface thermal anomaly region as a target region to perform geothermal potential assessment, and completing preliminary grading assessment of the target region; integrating seismic active band high-frequency monitoring data, inverting deep structure features by using a seismic wave velocity tomography technology, and performing multi-mode correlation matching with a target region; the coupling model realizes accurate evaluation and grading screening of a target region; and constructing a geothermal target area digital twinborn model fused with geologic and geophysical constraints, and realizing dynamic evaluation and productivity prediction of geothermal resources. Automatic geothermal resource evaluation is achieved, and efficient development and reasonable utilization of geothermal resources are promoted.

The invention relates to the technical field of petroleum and natural gas drilling engineering, and discloses a deep well geological exploration tunneling parameter control system and method, and the system comprises a signal collection and synchronization module which collects drilling parameters and aligns timestamps; the initialization and modeling module is used for calculating fluid transmission time lag and blade skim-over frequency; the active disturbance generation module generates a target bit pressure instruction superposed with sine disturbance to drive load application; the two-channel feature extraction and verification module aligns the historical torque and the current pressure according to time delay and calculates the confidence coefficient in combination with the frequency; the adaptive decision and closed-loop control module uses the confidence coefficient to correct the gain and update the reference bit pressure to form a closed loop. A dual-channel verification framework based on fluid-structure interaction transmission time lag and blade characteristic frequency is constructed, the covering effect of long-distance drill column friction torque on real cutting torque in deep well operation is effectively stripped, and it is ensured that a control system only responds to effective rock breaking action.

The invention discloses a new-type barite deposit mineralization mode construction method based on a same sedimentary fault. The method belongs to the field of geological exploration and mineral resource prediction, and comprises the following steps: analyzing the earth crust cracking activity history of an earthquake-Hangjian broken basin, and recovering a basin'checkerboard 'structure prototype; by means of field geological survey and research, drilling engineering, geophysics, remote sensing geological big data and the like, north-east-east-direction and north-west-direction co-sedimentary fault networks are identified and modeled, and a deep metallogenic fluid rising and jet flow channel is determined; the metallogenic process is concluded into a hydrothermal jet flow stage and an underwater gravity flow deposition stage, deep fluid is revealed to rise, jet flow and precipitate along a fault, and an ore-rich zone of a composite seabed fan body group is formed; and a geochemical prospecting prediction model combining trace element and sulfur isotope characteristics is established. The method systematically clarifies a coupling mechanism of ore control of the same sedimentary fault, ore-forming fluid migration and gravity flow deposition, and provides a theoretical basis and a technical means for prospecting prediction of the barite deposit in the Hendan-Hangjian fault basin.

The invention relates to the technical field of petroleum and natural gas drilling engineering, and particularly discloses a multi-field coupled complex fractured formation fracture width distribution inversion method, which is characterized in that a drilling fluid leakage model considering a fluid-solid coupling effect is constructed based on a porous elastic mechanics theory, and a roughness correction factor is introduced to correct a traditional cubic law; the application of the Darcy law in the matrix is perfected, a matrix and crack coupled drilling fluid leakage mathematical model is established, the influence rule of key parameters such as fluid viscosity, pressure difference and crack width on the drilling fluid leakage amount is obtained through numerical simulation, and on the basis, the drilling fluid leakage amount is calculated. According to the method, the crack width multiple linear regression inversion equation with the fluid viscosity, the pressure difference and the accumulated leakage as independent variables is established, the inversion equation has high prediction precision and practicability and can be used for rapidly and accurately inversing the crack width on site, and theoretical and technical supports are provided for multi-scale fractured formation leakage mechanism understanding and leakage prevention and control optimization.

The invention relates to the technical field of underground resource drilling and production engineering, and discloses a rescue well underground detection method based on ultrasonic probes and a related device.A plurality of ultrasonic probes are arranged in a rescue well applying the detection method in the circumferential direction of the rescue well, and the ultrasonic probes are used for emitting detection sound wave signals to the surrounding stratum of the rescue well; receiving a reflected sound wave signal from the target well; the detection method comprises the following steps: acquiring a reflected sound wave signal received by each ultrasonic probe; the position of the target well relative to the rescue well and the distance between the target well and the rescue well are determined according to the reflected sound wave signals. The problem that the detection performance of an existing active magnetic distance measurement scheme based on a current injection mode is limited in a high-resistance stratum environment can be solved, and measurement response errors caused by divergent current of a stratum loop can be avoided.

The invention provides a construction method and application of a well site real-time data pre-training model, and belongs to the crossing field of petroleum engineering and artificial intelligence. Carrying out discrete marking; the method comprises the following steps: constructing a self-supervised time sequence model based on a Transform architecture, and fusing position coding and an embedding mechanism; designing a self-supervised task, and setting multiple task targets such as mask prediction, comparative learning, sequence judgment and future state prediction; performing end-to-end training on the model through a joint loss function, and extracting deep time sequence features; deploying the pre-training model in an actual well site environment, and executing tasks such as anomaly detection, working condition recognition and trend prediction; and carrying out model optimization and iteration. The invention further provides application of the method in the field of intelligent monitoring of oil and gas drilling engineering. According to the method, the problems of high dependence on manual labeling, weak model generalization ability, insufficient real-time adaptability and the like of a traditional method are solved, and the method has good engineering deployment and cross-well-site popularization value.

The invention relates to the technical field of drilling engineering and geological safety monitoring, in particular to a water drilling hole wall stability early warning method based on slurry parameters and drilling tool postures, which comprises the following steps of: 1, sensing and acquiring multi-source heterogeneous parameters in real time; 2, constructing a hole wall stability evaluation index system; step 3, constructing a virtual drilling digital twinborn model and performing stress simulation; according to the method, synchronous acquisition and fusion analysis are carried out by integrating the mud performance parameters, the drilling tool attitude parameters and the stratum response parameters, a multi-source heterogeneous hole wall stability evaluation index system is constructed, multi-source information fusion algorithms such as a D-S evidence theory and Kalman filtering are adopted, the limitation of dependence on a single parameter in the prior art is overcome, and the method is suitable for large-scale popularization and application. According to the method, the hole wall state can be comprehensively judged from multiple dimensions of mechanical balance, slurry wall protection efficiency and drilling tool disturbance, the comprehensiveness of risk identification and the accuracy of early warning signals are remarkably improved, and misjudgment or missed judgment caused by information islands is avoided.

The utility model relates to the technical field of drilling engineering, and particularly discloses a locking device of a flashboard blowout preventer, which comprises a hydraulic cylinder head, the hydraulic cylinder head is provided with an inner hole and an observation groove communicated with the inner hole, the hole wall of the inner hole is provided with at least two first locking petals protruding along the radial direction, and the first locking petals are distributed at intervals along the circumferential direction. A lock groove is formed in the middle of each first lock petal; the manual locking shaft is arranged in the inner hole in a penetrating manner; the locking shaft sleeve is arranged outside the manual locking shaft in a sleeving mode, and second locking petals corresponding to the first locking petals are arranged on the peripheral face of the locking shaft sleeve; the locking rod is used for being arranged in the observation groove in a penetrating mode and inserted into the locking hole so as to drive the locking shaft sleeve and the manual locking shaft to rotate around the axis, and therefore the second locking petal can rotate in the locking groove till the second locking petal is opposite to the first locking petal so as to be locked in the axial direction. The locking device of the flashboard blowout preventer is simple in structure, convenient to operate, safe and reliable, and is not easily locked due to corrosion and other reasons through matched locking of the first locking petal and the second locking petal.

This invention relates to the field of oil and gas drilling engineering technology, and particularly to an active straightening drill string and well deviation control method based on umbrella-shaped corner contact sensing. The method includes: an umbrella-shaped corner contact sensing unit comprising multiple sets of linkage units, with a contact switch sensor integrated on the contact sensing rod of each linkage unit; a straightening unit comprising two robotic arms, two push blocks, and a linear drive assembly; a control unit electrically connected to the contact switch sensor, the robotic arms, and the push blocks; the contact switch sensor outputs a wellbore contact signal, and the control unit receives the wellbore contact signal to control the two robotic arms to press against the wellbore for auxiliary straightening, thereby controlling the two push blocks to move away from each other and press against the wellbore for active straightening. This invention utilizes a purely mechanical contact sensing principle, eliminating the need for complex electronic measurement circuits and improving the operational reliability of the drill string under harsh drilling conditions; the straightening method combining the robotic arms and push blocks effectively ensures the accuracy and stability of the push force control.

The present application provides a kind of formation threshold WOB and threshold torque determination method and device, belong to drilling engineering technical field, the method includes: obtaining different preset top drive speed under, in the preset WOB interval, the mechanical drilling speed, torque value and drill bit vibration parameters corresponding to different WOB value;For each preset top drive speed: based on the WOB value of the preset top drive speed and the mechanical drilling speed corresponding to the WOB value, determine the initial threshold WOB of the preset top drive speed from the WOB value;Based on the initial threshold WOB of the preset top drive speed, the torque value corresponding to the preset top drive speed is determined as the initial threshold torque of the preset top drive speed;Based on the drill bit vibration parameters corresponding to initial threshold WOB, initial threshold WOB and initial threshold torque are corrected, and formation threshold WOB and formation threshold torque are obtained.The present application has the advantages of simple calculation method, more accurate result, can effectively guide the selection of drill bit and screw rod, improve the mechanical drilling speed, and improve the rock breaking efficiency.

The invention provides a method and system for determining the track of a ground reverse inclined shaft of a steeply inclined seam, and relates to the technical field of steeply inclined seam mining and ground drilling engineering. A wellbore trajectory design basic model is established based on coal seam boundary elevation, coal seam inclination angle, effective thickness and roof mechanical parameters; constructing a rectangular plane coordinate system on the top plate side of the goaf to obtain a space coupling relation between a shaft track and a rock stratum structure; smooth transition of a wellbore track is achieved through segmented arrangement of a vertical well section, a deflecting section and a reverse inclining section; determining a rock stratum movement line and calculating an included angle by combining ground surface movement monitoring, and delimiting a safety protection zone between the rock stratum movement line and a roof fracturing target layer; and finally, a trajectory equation of each well section is established with the safety protection zone, the rock stratum movement line intersection point and the rock stratum movement influence boundary as constraints, and a reverse inclined shaft trajectory meeting the requirements for interference avoidance safety and fractured layer coverage precision is obtained.

This invention discloses a core retrieval or recovery tool for drilling, relating to the field of drilling engineering technology. The internal drill string assembly is suspended within the central channel of the external drill string assembly via a centralizer. The lower end of the internal assembly is a retaining spring assembly, and the lower end of the external assembly comprises the drill bit and multiple sliding blocks. One end of each sliding block extends into one end of the drill bit and is suspended by an elastic element. One end of the retaining spring assembly passes through the drill bit and extends between the sliding blocks, with the outer wall of the retaining spring assembly engaging with the inner wall of each sliding block via a bevel. Drilling fluid is introduced into the internal drill string assembly, causing it to move downwards relative to the external assembly. The downward movement of the retaining spring assembly pushes the sliding blocks outwards away from the drill bit's centerline. When the internal drill string assembly resets, the elastic element drives the sliding blocks back towards the drill bit's centerline. This invention improves drill string throughput and prevents the loss of incomplete or fragmented core samples at the drill bit, thereby increasing the core retrieval rate or core recovery rate.

The invention discloses an underground magnetic distance measurement transceiving system and a detection method, and belongs to the technical field of underground resource drilling engineering, the system comprises a transmitting electrode, a first shielding electrode, a second shielding electrode, a loop electrode and a ground case; the ground case is electrically connected with the emission electrode, a first shielding electrode and a second shielding electrode are arranged on the two sides of the emission electrode respectively, and the first shielding electrode and the second shielding electrode are both equipotential with the emission electrode; the emission electrode, the first shielding electrode, the second shielding electrode and the loop electrode are electrically connected. The shielding electrode and the emission electrode are ensured to be equipotential, so that the electric field is radially distributed around the emission electrode, the electric field radially penetrates into the stratum along the surface of the electrode, the current entering the deep position of the stratum through the emission electrode is greatly enhanced, and the collection current on a target sleeve is further enhanced. The depth of a current loop is effectively increased, an induction signal generated by a target is enhanced, and the sensitivity of a detection system is further improved.

The invention relates to the technical field of petroleum and natural gas drilling engineering, in particular to a solid-free well killing fluid and a preparation method thereof, and the solid-free well killing fluid comprises the following raw materials in parts by weight: 80-100 parts of a base fluid, 25-35 parts of a composite additive, 8-12 parts of a soluble thickener, 6-10 parts of a liquid-phase anti-collapse agent and 3-5 parts of a lubricating aid. According to the high-density well killing fluid, a high-density system is constructed through the additive solution A of the composite additive, the specific gravity upper limit of a traditional salt weighting agent is broken through, the hydrotropy stabilizing effect of triethanolamine is combined, salting-out of high-concentration components is avoided, and the problem that specific gravity increase of traditional solid-free well killing fluid is limited is effectively solved; the system viscosity is increased, a liquid rubber plug can be formed, exchange dilution of the well killing fluid and residual sewage in a shaft is effectively blocked, performance degradation caused by dilution of the well killing fluid is avoided, and material waste caused by supplementing of the well killing fluid is also reduced.

The invention particularly relates to an intelligent routing inspection scheduling method based on 5G big data fusion, and relates to the technical field of water area drilling guiding and routing inspection scheduling, and the method comprises the steps: coupling geology, drill string mechanics and a guiding tool response model to construct a digital twin system, and combining an LSTM prediction model to quantify a rail deviation risk; and generating a grading task based on the trigger condition, and scheduling inspection resources. According to the method, multiple physics fields are coupled to construct a digital twin system, the LSTM prediction model is matched to realize accurate track prediction in the future 10 m, the track deviation risk is quantified through the three-dimensional Euclidean distance, post deviation correction is upgraded to pre-deviation prevention, an intervention time window is reserved in advance, a high-risk scene is effectively avoided, the strict requirement of underwater drilling engineering for the guiding precision is met, and the method is suitable for large-scale popularization and application. And the core pain points of fuzzy track and delayed deviation correction in the traditional technology are solved.

This invention relates to the field of geotechnical drilling engineering technology, and discloses a method for drilling small-diameter deep wells, comprising the following steps: using a positive circulation drilling rig to prepare a mud system based on the laterite soil of the construction site; using a composite reinforced roller cone bit for drilling operations in pebble layers; using a semi-automatic pulley system to connect or disconnect drill rods; using a positive circulation drilling rig to perform a segmented lifting and scraping wall composite process for drilling, in which a hole guide tool is used for scraping the wall; determining the depth of the aquifer before lowering the well casing; completing the butt joint connection of the well casing by welding, and completing the lowering and installation of the well casing; after the well casing is installed, sequentially performing mud replacement, air compressor agitation and well washing, and simultaneously completing the symmetrical backfilling of filter material; conducting a pumping test to complete the well completion quality acceptance. This invention can significantly improve drilling efficiency, well completion quality, and construction safety in complex pebble formations, while effectively reducing construction costs.

This invention discloses a well-clearing device, relating to the field of oil drilling engineering technology. The device includes a first milling column and a second milling column. The first milling column has a first cutting outer diameter. The second milling column is connected to the first milling column, and its second cutting outer diameter is adjustable, with the first cutting outer diameter falling within the adjustment range of the second cutting outer diameter. This well-clearing device can improve well-clearing efficiency and reduce well-clearing costs.

This invention belongs to the field of drilling engineering technology and discloses a continuous shock release device, including a pulse shock unit and a differential pressure unit. The upper valve of the differential pressure unit has a first state and a second state during rotation. In the first state, the upper valve covers the main hole and avoids the secondary hole, so that the mounting sleeve is under high pressure. Under high pressure, the piston assembly hammers the bottom wall of the first chamber to generate vibration. This vibration is transmitted through the cylinder assembly and the mounting sleeve to the release component below, thereby causing vibration of the fish and its stuck position. When the upper valve rotates to the second state, the upper valve covers the secondary hole and avoids the main hole, so that the mounting sleeve is under normal pressure. Under normal pressure, the piston assembly moves in the opposite direction and resets. The upper valve rotates continuously relative to the lower valve, so the piston assembly can transmit high-frequency, pulsed shock waves to the fish through the release component. The high frequency and large shock force effectively improve the success rate of release.

The invention relates to the technical field of petroleum and natural gas drilling engineering, and discloses a method and device for determining a jamming early warning threshold value and a medium, and the method comprises the steps: obtaining current drilling working condition data and a plurality of pieces of historical jamming working condition data; on the basis of a current drilling working condition feature vector of the current drilling working condition data and historical drilling jamming working condition data feature vectors of the multiple pieces of historical drilling jamming working condition data, the similarity between the current drilling working condition data feature vector and the multiple pieces of historical drilling jamming working condition data feature vectors is determined; according to the plurality of similarities, determining drill jamming early warning weights corresponding to the similarities; and according to the critical maximum friction resistance in the plurality of pieces of historical drilling tool jamming working condition data and the plurality of drilling tool jamming early-warning weights, obtaining a drilling tool jamming early-warning threshold value corresponding to the current drilling working condition data. The accuracy, the stability and the engineering applicability of determining the early-warning threshold value of the drilling tool jamming under the complex working condition are improved.

This application discloses a high-pressure brine-resistant filtration loss reducer and its preparation method, belonging to the field of oil and gas well drilling engineering. Based on the requirements for resistance to complex salts, especially calcium and magnesium, this application optimizes the molecular structure of the high-pressure brine-resistant filtration loss reducer and introduces an acryloylmorpholine monomer, significantly improving its temperature resistance, stability, and salt tolerance. Since the copolymerization reaction of the selected monomer is relatively simple, the polymerization reaction adopts free radical solution polymerization. The prepared filtration loss reducer has achieved good performance in both laboratory and field application evaluations.

The application relates to the technical field of oil reservoir engineering, and is a stratum collapse pressure measuring and calculating method and device combining seismic wave velocity and fault effect, the method comprising the following steps: obtaining the depth pressure and the ratio of transverse wave velocity to longitudinal wave velocity of a target drilling well; establishing a collapse pressure calculation formula according to the relationship among the collapse pressure, the depth pressure and the structural influence; and measuring and calculating the stratum collapse pressure according to the depth pressure, the ratio of transverse wave velocity to longitudinal wave velocity and the collapse pressure calculation formula. The application deeply excavates the petrophysical characteristics of seismic wave velocity reaction, expresses the stratum stress balance state by using the fault activity effect, replaces the complex and difficult-to-measure rock elastic parameters in the traditional Mohr-Coulomb criterion by the ratio of transverse wave velocity to longitudinal wave velocity and the fault effect parameter, greatly simplifies the calculation process, significantly reduces the parameter acquisition difficulty, and has multiple advantages of simple operation, strong timeliness, high calculation efficiency and high accuracy, thereby providing an innovative solution for the rapid and accurate measurement of the stratum collapse pressure in the drilling engineering.

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 invention discloses an interpretable anomaly detection method and device for a top drive drilling device, equipment and a medium, which are applied to the field of drilling engineering, and are used for acquiring operation data of a to-be-detected mechanical part in the top drive drilling device, and dividing the operation data into various working condition data sets based on working condition parameters, extracting feature data of each feature parameter from each working condition data set; determining a working condition sensitivity index and a conflict index based on a grey correlation degree coefficient and a correlation coefficient between the characteristic parameters, and optimizing memory matrix input parameters by utilizing sensitivity analysis and correlation analysis; a clustering algorithm is used for screening sample data to construct a spatial memory matrix, and a multivariate state estimation method and a sequential probability ratio test method are combined to carry out anomaly detection on the mechanical part to be detected; furthermore, interpretability analysis of the abnormal parameters is carried out, and the abnormal key parameters are visually revealed. The self-adaptive judgment of the running state of the equipment and the abnormal traceability of each mechanical part in the top drive well drilling device are realized.