116 results about "Well engineering" patented technology

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 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 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 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.

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 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 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 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.

The utility model discloses an integral hoisting device and a blowout preventer group for petroleum drilling, and relates to the technical field of petroleum drilling engineering, the integral hoisting device comprises two hoisting bodies which are of plate-shaped structures, clamping grooves are formed in the middles of the hoisting bodies, the number of the hoisting bodies is two, and the clamping grooves of the two hoisting bodies are matched to be used for clamping the blowout preventer group; the clamping seat is arranged at the first end of the hoisting body, a limiting groove is formed in the clamping seat, and a through hole is formed in the clamping seat; the clamping head is arranged at the second end of the hoisting body, the clamping head is matched with the limiting groove, a through hole is also formed in the clamping head, and when the clamping head is inserted into the clamping seat, the clamping seat is communicated with the through hole in the clamping head; the connecting assembly is arranged in the through hole and is used for realizing detachable connection of the two hoisting bodies; and the lifting lug is arranged on the lifting body and is used for being connected with lifting equipment. According to the integral hoisting device and the petroleum drilling blowout preventer group, the clamping heads and the clamping seats are arranged at the two ends of the hoisting bodies, connection of the two hoisting bodies can be simply achieved through the connecting assemblies, and the hoisting process is optimized.

The invention relates to the technical field of drilling engineering, and discloses a drill rod landing detection method, device and system, a lifting drill floor and a storage medium. The method comprises the steps that the numerical value of lifting force needing to be generated by the drill rod landing detection system is determined, and the lifting force is smaller than the gravity of a drill rod; according to the numerical value of the lifting force, the drill rod landing detection system is adjusted to generate the corresponding lifting force, and the position of an oil cylinder piston rod in the drill rod landing detection system is recorded; and when the piston rod of the oil cylinder generates displacement of a preset threshold value, determining that the drill rod falls to the ground. The landing state of the drill rod is accurately recognized by automatically detecting the displacement change of the piston rod of the oil cylinder, the landing state of the drill rod can be automatically and accurately recognized, manual judgment errors are avoided, and operation safety and continuity are improved.

The invention belongs to the technical field of oil and gas well drilling and completion engineering design and construction, and particularly provides a well group underground drilling anti-collision detection method which comprises the following steps: determining a target site; a foundation well is drilled in the target site; drilling a plurality of adjacent wells around the base well; a casing pipe is put into the adjacent well; an anti-collision tool is put into the foundation well; and starting the anti-collision tool to carry out magnetic detection on the casing pipe in the adjacent well, comparing a magnetic detection result with actual data of the casing pipe in the adjacent well, and correcting until the magnetic detection result is consistent with the actual data, thereby completing anti-collision detection. The problem that the research and development progress of the large well group drilling anti-collision tool is reduced due to the fact that the effect of the large well group drilling anti-collision tool is not systematically verified in the prior art is solved. Data are provided for improvement of the anti-collision tool, the magnetic detection effect of the anti-collision tool is improved, the improvement time of the anti-collision tool is shortened, and the research and development cost is reduced; and the current related technical blank is filled.

This utility model discloses a foam drilling integrated logging engineering parameter collector, relating to the field of oil and gas exploration technology. It includes a main unit, a processing unit and a detection unit disposed within the main unit, and a filter unit disposed above the main unit. The processing unit includes an isolation plate installed inside the main unit, dividing it into an impact zone and a buffer zone; an air-liquid inlet pipe installed on the side wall of the main unit and extending into the impact zone; and a liquid discharge component disposed on the side of the main unit. This utility model is a foam drilling integrated logging engineering parameter collector. Through the processing and filtration units, it achieves the cleaning of the fine-mesh filter screen, avoids clogging, ensures the normal discharge of escaping gas, and improves the accuracy of detection data.

The application discloses a downhole instrument creep detection method based on multi-source sensor fusion and relates to the technical field of oil and gas well engineering, which comprises the following steps: obtaining sensor data of a target instrument in a target downhole preset period and preprocessing the sensor data to obtain preprocessed sensor data; performing magnetic interference detection based on the preprocessed sensor data to obtain a first detection result; performing multi-source joint likelihood ratio test based on the first detection result and the preprocessed sensor data to obtain a second detection result; when the second detection result meets the requirements, performing accelerometer variance detection and fiber-optic gyroscope output energy detection based on the preprocessed sensor data to obtain a third detection result; when the third detection result meets the requirements, constructing a long-period observation window and obtaining a second variance based on the preprocessed sensor data; and determining a creep termination time based on the second variance and the long-period observation window. The application realizes sensitive capture of small creep movement of a downhole instrument and further obtains an accurate creep time of the downhole instrument.

The invention discloses a steel structure cantilever platform system for rotational flow pool open caisson construction, and relates to the technical field of cantilever platform systems. Comprising a plurality of overhanging main beams annularly embedded along the well wall of the open caisson, a secondary beam network installed at the tops of the main beams and arranged in the radial direction, an annular ring beam connected with the inner side ends of all secondary beams to form a closed frame, a platform bed board laid on a framework, a diagonal bracing system connected with the bottoms of the main beams and the well wall, and a safety protection system on the edge of a platform. According to the core of the method, through the design of high-position pre-burying and synchronous sinking, a platform main structure is pre-installed at the elevation higher than the underground water level when the second section of the open caisson is manufactured, and therefore a dry and stable high-altitude operation face is provided all the time in the subsequent sinking and construction process. The system fundamentally avoids the problem that a scaffold is erected in accumulated water and sludge at the bottom of a well in a traditional process, parallel working procedures are achieved, construction safety, efficiency and economical efficiency are remarkably improved, and the system is particularly suitable for deep well engineering with the high underground water level.

The invention provides a maximum horizontal principal stress obtaining method based on a Mohr-Coulomb criterion, and belongs to the technical field of reservoir rock mechanics research. The maximum horizontal principal stress obtaining method comprises the steps that formation pore pressure and rock strength parameters are obtained through comprehensive logging data, and drilling fluid column pressure is calculated through drilling fluid density data; measuring the minimum horizontal principal stress; the well wall caving width is obtained through the dual-hole-diameter logging data; according to a calculation equation, factors such as tectonic stress, drilling working conditions and formation fluid are fully considered in the method, and the well wall caving width is obtained through well logging information; indoor rock core testing is not needed; the calculation precision is high, and a scientific basis is provided for oil reservoir engineering, drilling engineering and yield increase engineering.

The present application relates to oil and gas well engineering cementing material field, disclose a kind of in oil and gas well reconstruction wellbore cementing operation method, wherein, the method comprises: with aqueous epoxy resin, first part cement and second part cement preparation cement slurry, then cement slurry is injected into cement sheath;Wherein, the weight ratio of aqueous epoxy resin, first part cement and second part cement is 1:30-60:75-125;The epoxy equivalent of the aqueous epoxy resin is 900-1300g / eq, D50 is 0.3-0.4 μm, D90 is 0.4-0.5 μm;The ratio of D50 of first part cement and second part cement is 1.5-10:1, and the ratio of D90 is 1.5-4.5:1.The obtained cement slurry has higher compressive strength and lower elastic modulus, while the fluidity is better, and the cement slurry density meets the needs of different pressure system shale gas reconstruction wellbore.

The invention relates to the field of petroleum drilling engineering, in particular to an experimental device for simulating the well killing effect of a rescue well under different communication points. According to the technical scheme, a visual transparent outer shaft, an annular inner shaft, an upper plug and a lower plug form a shaft unit, a simulated rescue well, an angle sensor, a universal connector, an angle adjusting mechanism and a steel hoop form a rescue well unit, and an upper liquid outlet pipeline, a liquid storage tank, a stirrer, a screw pump and a kill fluid injection pipeline form a kill fluid injection unit. The air compressor, the pressure reducing valve, the pressure stabilizing valve, the gas flow regulator, the one-way valve and the gas inlet pipeline form a gas injection unit. The device has the beneficial effects that the simulation rescue well is connected through the universal connector and the angle adjusting mechanism, the complex flowing process of gas invasion and pressure back in a shaft can be simulated when the rescue well at different angles is killed, and the gas-liquid flowing rules of the rescue well at different angles, well killing fluid with different viscosities and at different flow speeds can be clearly observed.

A wellbore cleanliness evaluation method incorporating a cuttings weighing device, relating to the field of drilling engineering technology, includes the following steps: acquiring real-time cuttings weight data online using a cuttings weighing device, performing anomaly detection, and performing purification and completion processing. The cuttings weighing device is equipped with multiple sets of weight sensors distributed in a rectangular array for online collection of cuttings weight, classifying wellbore cleanliness status levels and numerical ranges. Based on the processed cuttings weight data, core parameters related to wellbore cleanliness status are calculated. These core parameters, combined with drilling engineering parameters, are used as feature vectors input to a random forest model for training, resulting in a wellbore cleanliness status judgment model. This model is used for online evaluation and optimization of wellbore cleanliness status during production. This invention, through a novel weighing bucket, combined with a weighted average algorithm using multiple distributed sensors and outlier removal logic, achieves accurate and reliable assessment of wellbore status in drilling scenarios.

The invention belongs to the technical field of oil and gas well engineering and drilling machinery, and discloses a multi-size drill rod coupling adaptability installation testing device, which comprises a translation lifting platform, an image acquisition device and an industrial personal computer, a lower drill rod fixing device is arranged on the translation lifting platform, and the lower drill rod fixing device is used for installing a simulation lower drill rod; the translation lifting platform can drive the lower drill rod fixing device to move in the Z direction and the X direction; the image collecting device can collect an end face position image of a top end coupling of the lower drill rod and an end face position image of a bottom end coupling of the upper drill rod and send the images to the industrial personal computer, and the industrial personal computer is used for controlling movement of the translation lifting table and uploading image data to the controller. According to the invention, the top end coupling of the lower drill rod can be movably positioned, and positioning information is fed back to a manipulator for grabbing the drill rod and a pair of tongs for screwing on and screwing off, so that the drill rod can be accurately grabbed on site, threads of male and female buckle joints are accurately matched and corresponding, and the quality and efficiency of screwing on and screwing off are improved.

This invention discloses an integrated logging-while-drilling (LOD) and measurement drill string assembly, relating to the field of oil and gas drilling engineering technology. It provides a series connection scheme for core protective drill string components, offering two switchable configurations: one with a mud motor and one without. Both configurations consist of an azimuth density neutron logging sub, a bidirectional communication power supply sub, an acoustic logging sub, a resistivity logging sub, an upper connecting sub, a flexible sub, a lower connecting sub, an azimuth gamma logging sub, and a steering actuator connected in series according to a fixed logic. The configuration with a mud motor only requires adding a mud motor at a designated location to complete the structural switch, without changing the series connection of the remaining subs. This assembly scheme is applicable to various drilling scenarios such as offshore exploration and development, deepwater drilling, complex directional wells, highly deviated wells, and horizontal wells. It enables integrated operations of geological steering, formation evaluation, and wellbore stability analysis during drilling, effectively improving drilling efficiency and reducing operational risks.

This invention relates to the field of oil and gas drilling engineering technology, specifically to a rapid directional drilling method for deep coal and gas horizontal wells based on real-time logging data, comprising: real-time acquisition of multi-source logging data; establishment of the functional relationship between idle friction torque and well depth; real-time calculation of effective rock-breaking torque of the drill bit; and MSE (Mean Separation of Forms). b Model building and real-time calculation; establishment and dynamic correction of lithology identification threshold: using logging and well logging data from adjacent wells, a statistical classification model for lithology identification is established; real-time guidance decision-making and trajectory adjustment: this application realizes real-time lithology identification, formation early warning and working condition judgment, thereby guiding precise adjustment of wellbore trajectory. This solution does not require additional equipment, is adaptable to complex drilling conditions, completely solves the data lag problem, significantly improves reservoir encounter rate and drilling efficiency, reduces operating costs and risks, and provides reliable technical support for the efficient development of deep coal and gas formations.

The embodiment of the invention relates to the technical field of drilling engineering, in particular to a drilling optimization decision-making method, device and equipment based on underground parameter regulation, and the method comprises the steps: obtaining drilling data which comprises underground engineering data and ground logging data; according to the well drilling data, the mechanical drilling speed, the mechanical specific energy and the complex working condition index of well drilling are calculated, and the complex working condition index is used for representing the vibration grade and the abrasion degree of a drill bit; by taking maximization of the mechanical drilling speed and minimization of the mechanical specific energy as targets and taking the condition that the complex working condition index meets the risk working condition constraint as a condition, an optimization model is constructed; according to the optimization model, underground engineering data are optimized, and the underground engineering data at least comprise underground bit pressure data and underground rotating speed data; and underground engineering parameters are regulated and controlled according to the optimized underground engineering data. By obtaining the underground engineering data and carrying out optimization decision making according to the underground engineering data, the problem of well-ground transmission deviation caused by dependence on ground logging data is fundamentally solved.

The present application belongs to the field of petroleum drilling engineering, and discloses a kind of overflow early monitoring method and device based on pressure wave, to improve the timeliness of drilling overflow monitoring.The method comprises setting initial amplitude value and initial frequency of pressure wave for implementing monitoring;Actual back pressure of wellhead return mud is detected based on the actual back pressure of wellhead return mud, and the back pressure frequency of wellhead actual back pressure pressure wave is determined based on the actual back pressure;Wellbore annulus pressure information of well bottom is collected in real time;Wellbore annulus pressure information is uploaded to the ground to generate ground signal;Downhole monitoring frequency is determined based on ground signal;Whether overflow occurs is determined based on the comparison of back pressure frequency and downhole monitoring frequency.The method and device of the present application can discover overflow earlier, and provide more time for overflow treatment.