317 results about "Well engineering" patented technology

The invention relates to a preparation method and application of a composite leakage-proof agent while drilling, and belongs to the technical field of petroleum drilling engineering. The composite leakage-proof agent while drilling is prepared from the following components in percentage by mass: 20-45% of nano composite particles, 15-35% of a multi-stage fiber reinforced network material, 10-20% of an intelligent response blocking agent, 5-10% of a high-temperature-resistant additive, 1-5% of a dispersing agent and the balance of deionized water, wherein the sum of the contents of all the components is 100%. According to the composite leak-proof agent while drilling provided by the invention, the temperature-sensitive resin with a core-shell structure is introduced, so that a three-dimensional synergistic mechanism of nano-composite particle filling-multistage fiber network bridging-intelligent response curing is realized, and efficient and environment-friendly plugging of an ultrahigh-temperature and high-pressure stratum is realized. The success rate of one-time plugging is increased from 45% to 92%, the average operation time is shortened by 60%, and an efficient solution is provided for deep and ultra-deep drilling.

The invention relates to the technical field of engineering early warning, in particular to a drilling engineering early warning method and system, and the method comprises the following steps: collecting a plurality of operation parameters of drilling equipment in real time based on a drilling engineering environment, screening the data, carrying out the comparative analysis of the parameters, evaluating the deviation between the current operation parameter and the conventional operation data, and carrying out the early warning of the drilling engineering. And obtaining equipment operation deviation information. According to the method, the operation parameters of the drilling equipment are collected and processed, key parameters such as the drill bit speed and torque are monitored in real time, deviation with conventional data is found in time, the abnormal condition of the equipment can be quantitatively evaluated by analyzing the frequency and duration of the operation deviation of the equipment, and the stratum data aggregation and trend analysis are combined. The safety of drilling operation is enhanced, the stability of a drilling site can be evaluated by extracting key features such as stratum density and rock hardness, risk classification is performed accordingly, risk early warning is achieved, and potential accidents are effectively avoided.

The invention relates to an intelligent inversion method and system for well drilling overflow shaft gas distribution based on a self-encoder, and belongs to the technical field of oil gas and geothermal development drilling and completion engineering. Comprising the following steps: step 1, accurately solving multiphase flow parameters of a shaft; 2, in combination with the drilling working condition and the geological condition of a specific overflow high-risk well section, based on a Monte Carlo sampling method, eight parameters are changed, uniform sampling is carried out, and a high-precision simulation data set is formed; step 3, constructing a neural network model for gas cut state inversion based on an auto-encoder neural network; 4, training is carried out; 5, standardizing one-dimensional time sequence parameters in the monitoring data; and inputting into a trained neural network model for gas cut state inversion based on an auto-encoder neural network to obtain distribution data of the overflow gas in the shaft in a time period in which the time sequence parameter at the current moment is located. According to the invention, the real-time rapid inversion of the gas distribution in the parallel cylinder during the drilling overflow parallel control period is realized.

The invention is suitable for the technical field of petroleum drilling engineering, and provides a drilling overflow early recognition method based on self-supervised learning, which comprises the following steps: constructing drilling multidimensional parameters into a time sequence sample by using a sliding time window, and inputting the time sequence sample into a multi-branch consistency constraint twinning network (MCSiam); the MCSiam firstly performs data enhancement on a sample, then extracts a local spatial-temporal feature and a long-term dependency relationship through an encoder composed of CNN-LSTM, and performs multi-branch comparative learning, consistency constraint optimization and predictor prediction and model optimization, and the finally trained model is used for early recognition of drilling overflow. The MCSiam is superior to a traditional method and other deep learning models in performance indexes such as accuracy, the calculation complexity is low, the applicability is wide, overflow early recognition is achieved, efficient and reliable technical support is provided for petroleum drilling safety and well control safety, and the method has good practicability and innovativeness in the field of drilling overflow early recognition.

The invention relates to the technical field of numerical simulation, in particular to a grid model generation method for the fluid displacement process of well cementation engineering. The method comprises the following steps: acquiring geological data of a well cementation project area, and constructing an initial geological model; well cementation engineering design data are obtained, well cementation engineering topological structure modeling is carried out, and a well cementation engineering topological structure model is obtained; according to the initial geologic model and the well cementation engineering topological structure model, fluid dynamic simulation is carried out, and a fluid characteristic matrix is obtained; performing fluid displacement process simulation according to the fluid characteristic matrix to obtain fluid displacement process data; performing fluid displacement process optimization on the well cementation engineering design data based on the fluid displacement process data to obtain optimized fluid displacement process data, and performing resource allocation redistribution on the well cementation engineering design data according to the optimized fluid displacement process data to obtain optimized well cementation engineering design data. According to the invention, the accuracy of fluid displacement simulation can be improved.

The invention relates to the technical field of petroleum drilling engineering, and particularly discloses an analysis and prediction system based on petroleum drilling and production data, which realizes virtual reconstruction of a physical drilling system by constructing a digital mapping body, and adopts a multi-source sensor network to collect drill string vortex frequency and wellbore temperature field gradient data. Forming a time sequence feature set through time sequence alignment and fusion processing; performing differential transformation and modal decomposition on the feature set to extract transient response feature vectors and generate a risk distribution diagram; establishing a parameter-risk correlation model, and decoupling mechanical vibration and thermal stress interference by solving a physical equation to obtain a dynamic risk index; the risk indexes and the process parameters are mapped to a three-dimensional grid to construct a multi-dimensional feature space, a feature fusion grid is adopted to achieve information aggregation and reconstruction, and comprehensive risk assessment indexes are generated; a dynamic early warning threshold value is established according to the evaluation indexes, and drilling parameters are optimized in real time through closed-loop control.

The invention is applicable to the technical field of petroleum drilling engineering, and provides a drilling overflow early recognition method based on deep reinforcement learning, which comprises the following steps of: firstly, collecting and preprocessing data, and then constructing and optimizing a drilling overflow early recognition model based on a near-end strategy optimization (PPO) algorithm, and finally, collecting data in real time in drilling operation, preprocessing the data, inputting the data into the model, analyzing the change of the characteristic quantity according to a PPO algorithm, judging whether an overflow sign exists according to an overflow drilling process flow, and if so, early warning according to a Reward function strategy. According to the method, a traditional threshold value method and machine learning are combined, a deep reinforcement learning algorithm is used for optimizing drilling parameter threshold values, characteristic quantity is monitored in real time to capture changes before overflow, historical data are self-learned to recognize an overflow mode, and dependence on field operators is reduced; meanwhile, model decision logic is displayed, understanding and trust of engineers are enhanced, more reliable overflow monitoring guarantee is provided for drilling operation, accident risks are reduced, and wellbore safety is guaranteed.

The invention belongs to the field of petroleum and natural gas drilling engineering, and particularly relates to an ocean fine pressure control drilling inspection device and method. A wellhead monitoring device is used for monitoring locking information of a hoop of an annular blowout preventer; the drill floor monitoring device is used for monitoring the coupling information of the drilling tool; the gas cut monitoring device is used for monitoring gas cut information in the well pipe; the pressure monitoring and automatic control system state monitoring device is used for monitoring valve information of the wellhead device; and the remote control center is used for receiving information sent by the wellhead monitoring device, the drill floor monitoring device, the gas cut monitoring device and the pressure monitoring and automatic control system state monitoring device. According to the invention, state monitoring of different processes such as a drill floor surface, a well mouth, a gas cut state, pressure monitoring and an automatic control system is realized, information interaction with a fine pressure control well drilling control center can be realized, whole-process monitoring of an equipment operation process is guaranteed, safety of a fine pressure control well drilling operation process is guaranteed, and labor force is saved.

The invention belongs to the technical field of petroleum and natural gas drilling engineering, and particularly relates to a borehole friction coefficient segmented inversion method based on a genetic algorithm and string mechanics, which comprises the following steps of: acquiring specified data of a construction well, dividing a borehole of the construction well to be predicted into well sections with fixed lengths, defining depth ranges of the well sections, and setting a global search range of a friction coefficient; initializing the population size, the maximum number of iterations, the selection probability, the crossover probability and the mutation probability of the genetic algorithm, and performing downward inversion section by section from a wellhead section: initializing a candidate friction coefficient population of a current well section, setting a sectional friction coefficient, calculating a hook load at the tail of the current section, and calculating the maximum number of iterations; iterative optimization is carried out until a termination condition is met, and then the optimal friction coefficient of the section is output and fixed; and iteratively executing until inversion of all well sections is completed, outputting a full-borehole segmented friction coefficient profile, and realizing intelligent segmented inversion of the borehole friction coefficient by combining a tubular column mechanical model and a genetic algorithm, so that the prediction precision of the friction coefficient is improved, and the well drilling design and construction are optimized.

The invention discloses a reamer electromechanical driving mechanism and method capable of detecting the position state of a blade, and relates to the technical field of tools of petroleum drilling engineering, the reamer electromechanical driving mechanism comprises a power assembly, a lead screw assembly, an ejector rod, a locking assembly, a rotation detector and a displacement detector which are mounted in a drill collar; the power assembly is connected with the lead screw assembly, the lead screw assembly is connected with the ejector rod, the ejector rod is connected with the reamer blade, the power assembly rotates and drives the ejector rod to move up and down through the lead screw assembly, and the ejector rod moves up and down to drive the reamer blade to be unfolded or folded. The locking assembly is assembled on the ejector rod, and after the reamer blade is unfolded in place, mechanical self-locking is conducted on the ejector rod. The rotation detector is assembled beside the lead screw assembly to detect rotation of the lead screw assembly, and the displacement detector is assembled beside the ejector rod to detect up-and-down movement of the ejector rod. The opening and closing state of the cutter wing is measured and uploaded through the rotating detector and the displacement detector, the cutter wing is expanded in place, the underground condition can be judged easily, and controllable multiple reaming is achieved.

The utility model discloses a telescopic underground connecting device, which belongs to the technical field of petroleum drilling engineering, and comprises a telescopic rod inner core, one end of the telescopic rod inner core is connected with an outer cylinder, a telescopic rod body is slidably connected in the outer cylinder, one end of the telescopic rod body is connected with a fixed end, and the fixed end is connected with the telescopic rod body. A first protective ring and a second protective ring are sleeved outside the telescopic rod inner core, a spring wire is arranged in the telescopic rod body, a first T-shaped sealing ring is connected in the outer cylinder, and a second T-shaped sealing ring is connected in the telescopic rod body. According to the telescopic underground connecting device, by arranging the telescopic rod body, the fixed end, the first high-pressure connecting plug, the second O-shaped sealing ring, the spring wire and the second high-pressure connecting plug, the connecting device has a telescopic function, connection between two underground drill collars is facilitated, the phenomenon that internal instruments are shortened due to drill collar repairing and buckling is avoided, and the telescopic underground connecting device is convenient to work and high in reliability.

The invention provides a drilling engineering drilling speed prediction network training method and an application method, and belongs to the technical field of drilling engineering optimizing.The training method comprises the steps that data screening is conducted on obtained drilling construction data to obtain effective construction data, variational mode decomposition algorithm noise reduction is conducted on the effective construction data to obtain noise reduction data, and the noise reduction data is used for obtaining the drilling engineering drilling speed prediction network; mechanism model prediction is carried out on the noise reduction data to obtain a mechanism prediction drilling speed, and the noise reduction data and the mechanism prediction drilling speed are combined to obtain drilling speed prediction training data; and inputting the drilling speed prediction training data into the initial drilling engineering drilling speed prediction network, and performing iterative optimization on network parameters of the initial drilling engineering drilling speed prediction network based on a particle swarm optimization algorithm to obtain a well drilling engineering drilling speed prediction network which is completely trained. According to the method, data noise reduction is carried out through the variational mode decomposition algorithm, a drilling mechanism model is combined, data features can be effectively mined, the model accuracy is improved, the calculated amount in the training process is reduced through the particle swarm optimization algorithm, and the training efficiency is improved.

The invention discloses a vertical shaft duct piece splicing device and a construction method thereof, and belongs to the technical field of vertical shaft engineering construction.The vertical shaft duct piece splicing device comprises a moving trolley, an overturning assembly, a clamping mechanism and a lifting mechanism, a support of the overturning assembly is vertically arranged on the moving trolley, and an overturning plate is rotationally connected to the support and provided with two guide columns; the overturning oil cylinder is used for driving the overturning plate to be switched between the horizontal state and the vertical state. A base of the clamping mechanism is provided with two guide holes for two guide columns to penetrate through, a clamping piece is rotationally arranged in a rotating groove of the base, an elastic piece is installed in the rotating groove and connected with the clamping piece, and when a duct piece is placed on a turnover plate in a horizontal state, the clamping piece can be pushed to be rotationally inserted into a hanging hole of the duct piece, and the elastic piece is stretched. The lifting mechanism is arranged on the overturning plate and can drive the base to drive the clamping piece to vertically move downwards. The vertical shaft duct piece splicing construction method adopts the vertical shaft duct piece splicing device. The device is high in stability, high in assembly precision and low in safety risk.

The present invention proposes a hydraulic power unit testing device, which belongs to the field of oil drilling engineering, and comprises a supporting mechanism, wherein the supporting mechanism comprises a base and a mounting shaft arranged on the base; a hydraulic power unit installed on the mounting shaft, wherein the hydraulic power unit provides hydraulic pressure; a force ring assembly sleeved on the mounting shaft, wherein the force ring assembly receives the pressure applied by the hydraulic power unit; and a data acquisition and control system, wherein the data acquisition and control system is connected to the hydraulic power unit and controls the hydraulic power of the hydraulic power unit, and the data acquisition and control system is also connected to the force ring assembly and acquires the pressure applied to the force ring assembly.

The invention discloses an oil-gas well high-pressure test automatic oil supply lubrication anti-leakage pollution device, and belongs to the technical field of oil-gas well logging engineering. According to the technical scheme, a lubricating section body used for supplying oil to a cable for lubrication is connected with a pressure guiding and drainage section body; the blowout prevention flow choking part is connected with the pressure guide and drainage section main body; a liquid gathering drainage cup is arranged between the blowout prevention flow choking part and the pressure guide drainage section main body; and the liquid receiving disc is connected with the lubricating section main body. The beneficial effects are that oil is automatically supplied for lubrication, and the problem of pollution caused by overflow and accumulation of lubricating grease manually coated on the cable surface is solved; liquid accumulated in the liquid gathering drainage cup naturally releases pressure in the inverted liquid gathering drainage cup, then freely falls into a liquid receiving plate and enters a ground recycling bin along a pipeline; the problems of pollution and high-pressure damage caused by leakage of the anti-spraying head during high-pressure testing are solved; the safety performance is good, the flow choking sealing filler adopts the polyurethane annular packing, the high-pressure performance is high, the elasticity is good, the sealing performance is high, high-pressure sealing can be effectively dealt with, and harm caused by high-pressure leakage can be prevented.

The invention relates to an underground HPHT area identification method and device, and belongs to the technical field of petroleum drilling engineering.The method comprises the steps that an initial temperature predicted value is calculated based on a temperature physical model, and an initial pressure predicted value is calculated based on a pressure physical model; extracting time sequence characteristic data and static characteristic data from the initial temperature prediction value, the initial pressure prediction value and the drilling data; respectively inputting the time sequence characteristic data and the static characteristic data into two base models of a completely trained integrated learning model to obtain a temperature compensation value and a pressure compensation value; and obtaining a final temperature prediction value based on the initial temperature prediction value and the temperature compensation value, obtaining a final pressure prediction value based on the initial pressure prediction value and the pressure compensation value, and identifying the HPHT region based on the final temperature prediction value and the final pressure prediction value. According to the method, the prior knowledge of the physical model and the learning ability of the integrated learning model are combined, and the prediction precision of the temperature and the pressure under the complex geological condition is effectively improved.

The invention belongs to the technical field of petroleum and natural gas drilling engineering, and discloses a device and method for testing wellbore pressure during simulated gas cut shut-in, and the device comprises a gas-liquid conveying and backflow system, a wellbore simulation system and a control and data acquisition system; the shaft simulation system comprises a simulation drill string, a simulation sleeve and an electric flat valve; the gas-liquid conveying and backflow system comprises a liquid injection pipeline, a liquid conveying pump, a liquid inlet pipeline, a liquid storage tank, a liquid return pipeline, a gas-liquid separator, an exhaust pipeline, a suction pump, a liquid discharge pipeline, a gas return pipeline, a nitrogen compressor, a gas injection electromagnetic valve and a gas injection pipeline; the control and data acquisition system comprises a control cabinet and a data acquisition unit. According to the invention, the pressure change of the shaft under different factors during the gas cut shut-in period can be effectively simulated, the pressure data is restored through the similarity principle, the pressure data is compared with the actual pressure grade of the wellhead blowout preventer, the maximum internal pressure resistance strength of the casing and the formation fracture pressure, and the safety and reliability of overflow shut-in are evaluated.

The invention discloses a variable-diameter two-stage drill bit suitable for viscoplastic stratums and a well drilling method, and belongs to the technical field of petroleum and natural gas well drilling engineering.The variable-diameter two-stage drill bit comprises a drill bit body; a plurality of reaming blades are arranged on the side face of the bit body, a force storage spring is arranged at the bit end of the bit body, and a pilot bit body is arranged at the other end of the force storage spring. The reaming blades are in sliding fit with the drill bit body, and the reaming blades are in sliding fit with the pilot bit body in the radial direction of the drill bit body. When the force storage spring pushes the pilot bit body to be away from the bit body, all the reaming blades move inwards in the radial direction while axially moving along with the pilot bit body; and when the pilot bit body compresses the force storage spring to get close to the bit body, all the reaming blades move outwards in the radial direction while axially moving along with the pilot bit body. Under the cooperation of bit pressure, the reaming cutter wings can stretch out or retract, and the diameter of the drill bit can be automatically adjusted; the overall structure is simple, and the reliability is high.

The utility model relates to the technical field of drilling engineering, in particular to a safety suspension device for petroleum drilling, which comprises a bottom plate, a suspension rod, a top ring and a plurality of protection units, each protection unit comprises a surrounding rod, a threaded rod, a shell, a limiting rod, a spring, a circular ring and a fixing disc, and a plurality of limiting holes distributed in a surrounding manner are formed in the fixing disc. A plurality of grooves distributed in a surrounding mode are formed in the bottom plate, and a plurality of threaded holes distributed in a surrounding mode are formed in the top ring. The limiting rod is pulled to be separated from the limiting hole, then the fixing disc is rotated to drive the threaded rod and the surrounding rod to rotate, then the threaded rod is separated from the threaded hole, then the fixing disc is pulled upwards to enable the surrounding rod to be separated from the groove in a matched mode, and the threaded rod and the surrounding rod are pulled out of the threaded hole. Therefore, a worker can quickly disassemble and replace the damaged surrounding rod, and the use safety of the device is effectively guaranteed.

The invention discloses a disassembly-free top drive drilling device pulley and guide rail system, relates to the field of petroleum drilling engineering, and solves the problems that a top drive drilling device is too long in assembly and disassembly time and too high in safety risk when applied to a telescopic derrick drilling machine. The derrick is divided into an upper derrick section and a lower derrick section; the slide rail comprises an upper slide rail section and a lower slide rail section; the upper-section sliding rail and the lower-section sliding rail are hooked through a hook; an upper-section sliding rail and a lower-section sliding rail are respectively arranged on two sides of the inner sides of the derrick upper section and the derrick lower section; two ends of the pulley are in contact with the upper-section slide rail and the lower-section slide rail; the working surfaces of the upper-section sliding rail and the lower-section sliding rail in contact with the tackle are on the same plane to form a tackle guide channel; the middle of the pulley is connected with a top drive; the top drive is hung below the traveling block and moves up and down along with the traveling block. According to the disassembly-free top drive well drilling device pulley and guide rail system, the assembly and disassembly time is saved, the danger in the assembly and disassembly process is reduced, and the well drilling efficiency and the construction quality are improved.

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 invention discloses a high-temperature well cementation cement expanding agent and a preparation method thereof, and belongs to the technical field of oil-gas well engineering well cementation materials. The high-temperature well cementation cement expanding agent is prepared from the following raw materials in parts by weight: 30-40 parts of dolomite; 10 to 20 parts of serpentine; 5 to 10 parts of hedenbergite; 5 to 10 parts of scolecite; 25-35 parts of slaked lime powder; 5-10 parts of quartz powder; the high-temperature well cementation cement expanding agent comprises the following chemical components in percentage by weight: more than 13wt.% and less than 23wt.% of MgO, more than 38wt.% and less than 55wt.% of CaO, more than 18wt.% and less than 32wt.% of SiO2, less than 3.5 wt.% of Al2O3 and less than 1wt.% of Fe2O3. The particle sizes of the high-temperature well cementation cement expanding agent are as follows: Dx (10) is less than or equal to 4 microns, Dx (50) is less than or equal to 10 microns, and Dx (90) is less than or equal to 20 microns. The invention also discloses a preparation method of the high-temperature well cementation cement expanding agent. Starting from cement main body minerals, through lattice solid solution, core-shell structure wrapping and other means, an expansion component and the hydration process of cement can achieve a synergistic reaction, and therefore the effective expansion effect is achieved in the cement gelling structure forming process.

The invention relates to a deep-water under-salt drilling wellbore pressure fine regulation and control system and method, and belongs to the technical field of oil and gas development drilling and completion engineering. The system comprises a wellbore inlet which is sequentially connected with an inlet displacement meter, a drilling fluid pump and a drilling fluid tank outwards, and a wellhead outlet is sequentially connected with a wellbore pressure regulation and control device, a slurry pump, an outlet flow meter and a slurry pool; the inlet displacement meter, the outlet displacement meter and the shaft pressure regulation and control device are all connected to the fine pressure control drilling system, the safety equivalent drilling fluid density of salt bed open hole sections of different depths can be obtained by accurately calculating the shaft temperature field and the equivalent circulation density and considering the influence of rock stratum creep characteristics on the drilling fluid density and the creep diameter shrinkage rate, and the drilling fluid density of the salt bed open hole sections of different depths can be obtained. And the wellhead return pressure is adjusted in real time, so that the precise regulation and control of the wellbore pressure are realized.

The invention relates to the technical field of oil field drilling engineering, and discloses a well leakage simulation plugging device for narrow-density window overflow leakage and leakage, which comprises a booster pump, a circulating cavity, a shaft, an annular pressure pump, a charging system, a core clamping system, a circulating system, an intelligent water and gas injection system and an intelligent filtrate analysis and measurement system, the feeding system comprises a plugging slurry tank I, a plugging slurry tank II and a stirrer; the rock core clamping system comprises an end face filtration clamp, a crack rock core and a pressure sensor II; the circulating system comprises a high-pressure circulating pump, a pneumatic three-way valve and a pressure sensor, the intelligent water and gas injection system comprises a water inlet, a gas inlet, a pressure regulating valve, a constant-flux pump and a flowmeter, and the intelligent filtrate analysis and measurement system comprises a piston container, a back-pressure valve, a balance, a buffer container and a manual pump. Due to the design of the double slurry systems, the flexibility of the experiment is improved, adjustment can be carried out according to the leaking stoppage effect, it is ensured that the experiment is closer to the actual working condition, and more comprehensive evaluation is provided for the material performance.

The invention provides a well bottom ECD accurate determination method based on a field multi-point cycle test, and belongs to the technical field of petroleum and natural gas drilling engineering. Comprising the following steps: selecting at least three different-depth test points on a casing section, and synchronously obtaining pump pressure, drilling fluid rheological parameters and borehole-drill rod geometric data; preprocessing the data; calculating annulus pressure loss, drill rod pressure loss and drill bit pressure loss of each test point based on an API standard formula; establishing a pumping pressure-pressure consumption associated linear equation set and solving annulus and drill rod pressure consumption correction coefficients; and outputting a shaft bottom ECD for eliminating naked eye interference in combination with the real-time drilling parameters and the inversion coefficient. According to the method, the multi-point cycle test and the dynamic inversion model are combined, the deviation between the theoretical model and the actual working condition is quantified through the correction coefficient, the weighted least square and the matrix condition number pre-judgment technology are combined, the problem of ECD calculation misalignment of a traditional method is solved, and the pressure control precision and safety in a complex drilling scene are remarkably improved.

The invention relates to the technical field of oil and gas drilling and completion engineering, in particular to a rock core hydration strain monitoring method and device based on multi-source fusion data, and the method comprises the steps: collecting first hydration strain data generated in the hydration process of a rock core through a rock core hydration strain monitoring system; inputting the first hydration strain data into a noise reduction model to obtain second hydration strain data after noise reduction; the second hydration strain data are converted into hydration stress data through an evolution model, distribution and evolution prediction results of the hydration stress in time and space are obtained, and the evolution model is obtained based on strain sample sequence data and stress label training and used for representing the mapping relation between the hydration strain and the hydration stress. The method accurately identifies the core hydration expansion evolution characteristics and predicts the well wall stability state, improves the experimental analysis efficiency and the result reliability, and has an important value for researching well wall stability monitoring and prevention and control.

The invention discloses an electricity-to-oil intelligent digital driving method and system adaptive to a petroleum drilling working condition, and belongs to the field of petroleum drilling engineering.The method comprises the steps that petroleum drilling data are collected through a multi-source sensor group, and the collected data are sent to an edge gateway controller to be preprocessed; a multi-source data stream obtained through preprocessing is sent to a cloud end, and a multi-source database is constructed; the intelligent torque prediction model is deployed at the cloud end, real-time estimation of the current drill bit load torque is achieved according to data in the multi-source database, and a drill bit prediction torque value is obtained; the cloud end issues the predicted torque value obtained through calculation to the edge gateway controller, and the edge gateway controller generates an actual control instruction according to the received predicted torque value. Safe and stable operation of drilling operation can be effectively guaranteed.

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 belongs to the technical field of petroleum drilling engineering, and discloses a drilling fluid leakage position prediction positioning system, which comprises a data acquisition module, a data processing and analysis subsystem, an intelligent diagnosis subsystem, a scientific decision subsystem and a visualization module, and is characterized in that the data acquisition module is used for acquiring multi-source data in a drilling process in real time; and the data processing and analysis subsystem is used for carrying out data cleaning and feature extraction on the collected data. According to the scheme, multi-dimensional data of geology, engineering, fluid and the like are integrated, and through combination of machine learning and a mechanism model, the layer position of leakage, the type of leakage and the width of a crack are judged with high precision. According to the method, the leak-proof and leak-stopping scheme is designed, the leak-proof and leak-stopping material with good leak-stopping performance and high material quantitative score is recommended, the leak-proof and leak-stopping scheme is further designed, the well leakage analysis and leak-stopping technology of the fractured stratum has pertinence, effectiveness and scientificity, technical support is provided for leakage prevention and control, and therefore the service is provided for scientific and high-quality well drilling and efficient exploitation of oil fields.

The invention relates to the field of petroleum and natural gas drilling engineering, and discloses a bent screw control device and method and a bent screw sliding guide system. The bent screw control device comprises a main body shaft, a lower joint, a friction outer cylinder, a friction inner cylinder, a clutch module and a control module. The control module can clutch the friction outer barrel and the friction inner barrel and control the clutch duration of the friction outer barrel and the friction inner barrel in the directional drilling working condition, torque transmission among the clutch drill rod, the main body shaft, the friction inner barrel, the clutch module, the friction outer barrel, the lower connector and the bent screw is achieved, the actual tool face angle of the bent screw is close to the expected tool face angle, and the drilling efficiency is improved. Therefore, the difference between the actual tool face angle and the expected tool face angle of the bent screw rod meets the required range, and effective control and balance of orientation of the bent screw rod are achieved.