192 results about "Well engineering" patented technology

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 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 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 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 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 discloses a casing centralizer with a pipe diameter adjusting function, and relates to the technical field of petroleum and natural gas drilling engineering equipment, the casing centralizer comprises two fixing rings which are symmetrically distributed left and right, the outer surface of each fixing ring is provided with a plurality of fixing seats at equal intervals in the circumferential direction, and each fixing seat is rotatably connected with a connecting plate; an elastic plate is arranged between the left connecting plate and the right connecting plate in the horizontal direction, and the two ends of each elastic plate are rotationally connected with the two adjacent connecting plates respectively. By rotating the adjusting bolt, the driving screw rod and the fixing pipe are in threaded transmission, and the distance between the two fixing rings is accurately controlled, so that the annular supporting frame formed by the connecting plate and the elastic plate generates controllable radial deformation; stepless adjustment of the supporting outer diameter is achieved, different borehole sizes are accurately matched, the problem that a centralizer with a fixed size is insufficient in supporting or difficult to descend is solved, it is ensured that a casing pipe is efficiently centered, and a foundation is laid for forming a uniform cement sheath.

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.

The present invention relates to a preparation method and application of a composite while-drilling leak-proof agent, and belongs to the field of oil drilling engineering technology. The composite while-drilling leak-proof agent is prepared from the following components in percentage by mass: 20-45% nano-composite particles, 15-35% multi-stage fiber-reinforced network materials, 10-20% intelligent response plugging agent, 5-10% high-temperature resistant additive, 1-5% dispersant, and the balance is deionized water, and the total content of each component is 100%. The composite while-drilling leak-proof agent provided by the present invention introduces a core-shell structured thermosensitive resin to realize a three-dimensional synergistic mechanism of "nano-composite particle filling-multi-stage fiber network bridging-intelligent response curing", thereby realizing efficient and environmentally friendly plugging of ultra-high temperature and high-pressure formations. The success rate of single plugging is increased from 45% to 92%, and the average operation time is shortened by 60%, providing an efficient solution for deep and ultra-deep drilling.

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.

The invention discloses a fracture-vug stratum well wall rock mechanical parameter prediction method based on well drilling chipping rock hardness in the fields of geomechanics, oil and gas well engineering and petroleum and natural gas exploitation. The method comprises the following steps: (1) well drilling chipping rock pretreatment and hardness testing; (2) constructing a quantitative relationship between rock skeleton mechanical parameters and hardness based on a homogeneous isotropic numerical model; (3) extracting stratum fracture-cavity structure characteristic parameters, and constructing fracture-cavity development rock numerical models of different sizes; (4) performing numerical simulation to calculate rock mechanical parameters of the fracture-vug development rock numerical models of different sizes; (5) well wall rock mechanical parameters of the fracture-cavity stratum are obtained through calculation; the invention provides a brand new theory and method for predicting and evaluating the mechanical parameters of the well wall rock of the complex structure stratum, and has important significance on safe drilling, efficient fracturing and the like of unconventional oil and gas resources such as deep and ultra-deep oil and gas, especially deep shale oil and gas of fracture-cavity development, deep complex carbonate rock oil and gas and the like.

The utility model belongs to the technical field of oil and gas well engineering equipment, and particularly relates to an efficient grinding shoe for a discarded well, which aims at solving the problems that the existing grinding shoe for the discarded well in the market is low in cutting efficiency, poor in guiding stability, single in grinding function, weak in chip removal capability, insufficient in durability and the like and is difficult to meet the actual operation requirements. The main cone comprises a front guide layer, a main grinding layer and a grinding layer; the main grinding layer comprises hard alloy teeth, main cutting blocks and auxiliary cutting blocks, the hard alloy teeth, the main cutting blocks and the auxiliary cutting blocks are distributed in a staggered mode, the main cutting blocks and the auxiliary cutting blocks are arranged on one side of the main cone and jointly form eagle-beak-shaped asymmetric teeth, and the single sides of the main cutting blocks and the auxiliary cutting blocks are edged. Through the arrangement of the main cone, the front guide layer and other components and the mutual matching relation between the diamond column body of the front guide layer and the main cone, the diamond column body can preliminarily crush obstacles in a discarded well through the posture that the diamond column body inclines forwards by 15 degrees and the included angle between the diamond column body and the central axis of the main cone is 15 degrees.

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.

The invention provides a rock triaxial anti-drilling strength optimization calculation method and device based on drilling fluid parameters, and relates to the technical field of crossing of petroleum drilling engineering and rock mechanics. The method comprises the steps that logging information and drilling parameters of a target stratum are obtained; determining pore pressure, maximum horizontal principal stress and minimum horizontal principal stress according to the logging information; based on the drilling parameters, the drilling fluid circulating liquid column pressure is determined, and the drilling fluid circulating liquid column pressure serves as axial stress; determining a first underground confining pressure and a second underground confining pressure according to the pore pressure, the maximum horizontal principal stress and the minimum horizontal principal stress; and selecting a compressive strength criterion according to different rock characteristics, and determining the triaxial compressive strength of the rock in combination with the axial stress, the first underground confining pressure and the second underground confining pressure.

The invention relates to the technical field of slurry cooling for petroleum drilling engineering, and discloses slurry cooling equipment for petroleum drilling engineering, which comprises a fixing mechanism slidably connected to the inner wall of a box body and used for collecting entering slurry, and a telescopic mechanism fixedly connected to the inner wall of the box body and used for slowing down the falling speed of the slurry. And the removing mechanism is fixedly connected to the inner wall of the box body and used for separating cold air from slurry, in this way, the slurry is evenly distributed on the surface of the inclined plate, the slurry can form a uniform water film, the heat exchange area is increased, the hot slurry which just enters is prevented from directly penetrating through holes and dripping to the bottom, and the heat exchange efficiency is improved. In this way, a large amount of slurry can be directly reutilized without being cooled, the cavitation phenomenon occurs after the slurry enters a pump body subsequently, and pump body leakage is caused.

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.

The application relates to a well-ground bidirectional communication method and device based on mixed dipole cooperation, which comprises an uplink communication device configured to encode and modulate collected downhole data by using a downhole transmitting device, transmit a modulated first time-varying electromagnetic field signal to the ground medium, simultaneously receive the first time-varying electromagnetic field signal by using a first magnetometer, and decode the received first time-varying electromagnetic field signal to realize downhole data uploading communication; and a downlink communication device configured to encode and modulate a control instruction to be transmitted downward by using a ground transmitting device, transmit a modulated second time-varying electromagnetic field signal to the ground medium, simultaneously receive the second time-varying electromagnetic field signal by using a second magnetometer, and decode the received second time-varying electromagnetic field signal to realize control instruction downward transmission communication. The application can be widely applied to the fields of oil and gas well engineering, while-drilling measurement and control and downhole communication.

The invention relates to a well-ground two-way communication method and device based on mixed dipole cooperation, and the device comprises an uplink communication device which is configured to carry out the coding and modulation of collected underground data through an underground transmitting device, transmits a modulated first time-varying electromagnetic field signal to a ground medium, and at the same time, transmits a second time-varying electromagnetic field signal to a ground medium; receiving the first time-varying electromagnetic field signal by using a first magnetometer, and decoding the received first time-varying electromagnetic field signal to realize underground data uploading communication; and the downlink communication device is configured to code and modulate a control instruction to be downloaded by using the ground transmitting device, transmit a modulated second time-varying electromagnetic field signal to the earth medium, receive the second time-varying electromagnetic field signal by using a second magnetometer, decode the received second time-varying electromagnetic field signal, and transmit the decoded second time-varying electromagnetic field signal to the ground medium. And control instruction downloading communication is realized. The method can be widely applied to the technical fields of oil and gas well engineering, measurement and control while drilling and underground communication.

The invention relates to the technical field of oil and gas well engineering measurement and underground information transmission, in particular to a double-insulation short section electromagnetic wave measurement-while-drilling device and method.The device comprises an upper insulation short section, a lower insulation short section and a middle metal drill collar shell; the top of the middle metal drill collar shell is connected with an upper insulating nipple, and the bottom is connected with a lower insulating nipple; a battery short section, a central control short section, a measuring short section and a transmitting circuit short section are arranged in the middle metal drill collar shell; the battery short section is located at the top of the metal drill collar shell, the center control short section is located below the battery short section, the measuring short section is located below the center control short section, and the transmitting circuit short section is located below the measuring short section. According to the invention, the problems of insufficient transmission depth, low anti-interference capability and obvious contradiction between power consumption and heat dissipation of an existing single-insulation short section device in a low-resistance stratum can be solved.

The invention provides a packer rubber cylinder optimization design method, device and equipment and a storage medium, and belongs to the technical field of oil and gas well engineering oil testing and well completion. The method comprises the following steps: acquiring measured mechanical property data of a rubber cylinder rubber material at an expected service temperature of a research well; rubber constitutive model fitting is carried out, and a target rubber constitutive model is determined according to a fitting result; rubber sleeve structure parameters and metal framework structure parameters of the research well are obtained; constructing a rubber sleeve combination finite element parameterized model; obtaining the temperature and the pressure load of the rubber sleeve under the specific well completion and oil testing working condition of the research well, and carrying out simulation analysis on the rubber sleeve combination finite element parameterized model under the temperature and the pressure load to obtain a rubber sleeve simulation analysis result; the sealing effect of the packer is evaluated according to the rubber sleeve simulation analysis result; and determining an optimal design scheme of the rubber sleeve according to an evaluation result. By means of the method, optimal design of the high-temperature-resistant and high-pressure-resistant packer rubber barrel is achieved, and the application requirements of ultra-deep and extra-deep wells are met.

The present application relates to unconventional oil and gas reservoir completion engineering technical field, especially a kind of bridge plug setting mechanism, to solve the problem of early setting of bridge plug in the process of downhole operation.The present application includes bridge plug, and the bridge plug includes upper cone, lower cone and slip;Upper cone and lower cone are respectively arranged on the upper and lower sides of slip, and are configured to move relatively to extrude slip.Upper cone and lower cone are configured to move down synchronously in the process of bridge plug setting mechanism downhole.As the bridge plug setting mechanism provided by the present application moves down synchronously in the process of downhole operation, the slip will not be extruded and expanded when bumping, resistance and other situations occur, which can prevent the bridge plug from anchoring on the casing and setting early, and prevent the construction risk caused by missetting.

The invention discloses a shaft excavation system and a construction method. The shaft excavation system comprises a ground drilling machine system, a downhole main machine system and a drill pipe device. The ground drilling machine system comprises a lifting driving device, a rotating driving device and the drill pipe device. The downhole main machine system comprises a rear matching platform, a rotary frame, an excavation device and a slag discharge device. The rear matching device is arranged on the rear matching platform. The drill pipe device is fixedly connected with the rotary frame. The excavation device is hingedly connected with the rotary frame and can swing along the radial direction of the rotary frame. The invention can weaken the ground shaft derrick suspension system, and is safe and convenient to disassemble. The invention can be used for multiple purposes, covering various strata and shafts with different diameters. The invention effectively solves the problems of complex shaft engineering equipment, long equipment period and poor application expansion.

The invention relates to the technical field of petroleum drilling engineering, in particular to a near-bit rotary spiral flow channel underground power generation device. The near-bit rotating spiral flow channel underground power generation device comprises a flow channel short section casing pipe, a cylindrical rotating body, an electromagnetic induction coil and a permanent magnet, the rotating body is rotationally assembled in the flow channel short section casing pipe, a spiral flow channel is formed in the inner wall of the rotating body, and the permanent magnet is installed on the side wall of the rotating body. The electromagnetic induction coil is installed on the side wall of the flow channel short section sleeve, and the side wall of the flow channel short section sleeve is provided with a rectifying and voltage stabilizing circuit connected with the electromagnetic induction coil. The underground power generation device has the advantages that the structural design is simple and reasonable, a large drilling fluid flowing space is formed in the device, effective flowing of drilling fluid is effectively ensured, the service life of the whole underground power generation device is prolonged, the probability that a power generator breaks down underground is greatly reduced, the working life of the power generator underground is effectively prolonged, and the service life of the power generator underground is prolonged. It is ensured that the power generation device provides stable and reliable electric energy supply for other underground measurement and control instruments.

The present application belongs to the technical field of oil drilling engineering, and particularly relates to a drilling hydraulics model correction method based on a measurement-while-drilling technology, and aims to solve the problem that the correction method of the prior art is difficult to further improve the prediction accuracy. The present application comprises the following steps: measuring the temperature and pressure of drilling fluid in a drill string and the temperature and pressure of annular drilling fluid at a measuring point position downhole by using a PWD tool; measuring the temperature and density of drilling fluid entering a well, the temperature and density of drilling fluid flowing out, and the standpipe pressure and wellhead back pressure; measuring the circulating pressure loss of a downhole tool string; and correcting the wellbore predicted temperature and pressure profile by using the above measurement data. The present application considers multiple correction parameters, and can provide a higher-precision correction result, so as to provide a higher-precision wellbore pressure prediction for pressure control drilling, and better support the pressure control drilling.

The application discloses a kind of super-long steeply inclined angle inclined shaft high-precision guide hole directional drilling and reverse shaft drilling combination construction method, it is related to inclined shaft construction technical field, including in the process of guide hole drilling construction, the drilling trajectory of drill bit is obtained in real time using measurement-while-drilling system;Drilling trajectory of drill bit is compared with preset drilling trajectory, and tool face angle of drilling tool is corrected and analyzed when deviation exceeds threshold range;Based on the analysis result, the adjustment amount of tool face angle of drilling tool is obtained, and the adjustment amount obtained is used to adjust tool face angle;When guide hole construction is to last 60 meters, switch to rotating magnetic field ranging system to guide the drilling trajectory of drill bit until the construction of guide hole is completed;Reverse shaft drilling machine is used to ream the guide hole, and the construction of inclined shaft is completed and the like steps, the present application effectively overcomes the influence of gravity and formation in the prior art, and can realize accurate construction of guide hole, effectively improving the construction quality of inclined shaft project.

A vibration measurement system and method for logging while drilling, belonging to the field of oil and gas drilling engineering technology and equipment, includes: a microcontroller for acquiring acceleration signals detected by an accelerometer, processing the data, and storing it in a Flash memory module, and communicating with a host computer via a communication interface; a power supply module for powering the entire system; an accelerometer for measuring the vibration experienced by the drilling equipment during logging while drilling and transmitting the detected acceleration signals to the microcontroller; a Flash memory module for storing the measured acceleration data and other important information; and a communication interface for enabling data communication between the microcontroller and the host computer. This invention allows for use in high-temperature drilling environments, expanding the system's application range; it possesses sufficient stability and anti-interference capabilities, effectively coping with complex downhole environments; and it enables efficient and stable data storage and transmission.