19results about How to "Improve mining efficiency" patented technology

The invention discloses a pressure-controlled drainage gas production method and system for a coal-bed gas well. The pressure-controlled drainage gas production method comprises the steps that drainage is conducted through the first daily drainage amount, wherein the first daily drainage amount meets the eliminating demand for production interference objects in a coal bed; and a pressure-supplementing medium is injected while drainage is conducted, and the downhole flow pressure daily drop amount is maintained as a first differential pressure value so as to avoid retracting and closing of pores and cracks in the coal bed. According to the pressure-controlled drainage gas production method for the coal-bed gas well, the drainage speed at the drainage state can be conveniently determined, the eliminating demands for drilling and completion fluids, pulverized coal and slack coal in the coal bed can be met, and meanwhile, retracting and closing of the pores and the cracks in the coal bed can also be avoided; and compared with the prior art, the pressure-controlled drainage gas production method is simple in process, the production efficiency of the coal-bed gas well can be greatly improved, and quite high practical value and popularization value are achieved.

The utility model discloses mechanical plugging layer-by-layer oil extraction device, including flow guide pipe, the one end of flow guide pipe is connected with the upper packer, and the other end is connected with the lower packer, and the three are all connected through upper and lower joint, the upper packer is used for plugging the upper end of the well section of plugging object, and the lower packer is used for plugging the lower end of the well section of plugging object, the upper packer, the lower packer and the flow guide pipe inside all are provided with gas flow guide passage, make the dissolved gas of lower oil layer free come out in turn through lower packer, flow guide pipe, upper packer and enter the oil jacket annular space of upper portion, finally discharge from wellhead. The utility model discloses device solved the gas lock problem of existing technology when sealing upper and extracting lower, can be used as the plugging tool of oil layer when sealing upper and extracting lower of oilfield long stop oil well, high water cut oil well, can improve oil well mining efficiency, reduce development cost, obtain greater economic benefit.

The application provides a gob roof impermeable system and an impermeable method thereof, which comprises a hanging unit arranged at the back side of a working face, an impermeable layer unit for laying on the top of a filling body, and a control unit in signal connection with the impermeable layer unit, wherein the impermeable layer unit is arranged on the hanging unit; the control unit is arranged to obtain a pushing speed parameter of the working face and an injection speed parameter of the filling body, and to control the laying speed of the impermeable layer unit according to the parameters, so as to realize dynamic matching of the laying speed of the impermeable layer unit, the pushing speed of the working face and the injection speed of the filling body. The impermeable layer assembly is laid synchronously with the working face advancing, and is adjusted in real time through the control assembly to adapt to the roof deformation and the dynamic change of the filling body; the system is integrated in a hydraulic support to realize integrated operation of "mining-filling-impermeable", without additional downtime, and the mining efficiency is improved; through reliable impermeability, the sealing efficiency of carbon fixation and filling is greatly improved, and the mine realizes negative carbon mining.

The utility model provides a kind of light supporting device for steeply inclined thin coal seam belongs to coal mining technical field, the light supporting device for steeply inclined thin coal seam includes side support frame in both sides, light supporting assembly is set between side support frame, light supporting assembly includes supporting bottom plate and supporting net in both sides, one side of supporting net is connected with steel chain, another side is connected with steel chain, electric winch is set on side support frame, one end of steel chain is connected with supporting net, and the other end is fixedly connected with the reel of electric winch by ring buckle;Side support frame includes stand, crossbeam and inclined strut, trapezoidal bottom plate is set in the bottom of stand, crossbeam is fixedly connected with stand by bolt, one end of inclined strut is connected with stand, and the other end is connected with bottom plate;Multiple groups of sliding slots are set on crossbeam, pulley is rotatably set in sliding slot, steel chain is wound around pulley;The utility model can solve the problem that dynamic support demand cannot be met.

This application provides a method, apparatus, medium, and program product for multi-round fracturing in deep coal reservoirs. It relates to the field of deep coal reservoir stimulation technology. Each round of multi-round fracturing includes hydraulic fracturing and well shut-in. A simulated fracturing scheme for the nth round corresponding to the target deep coal reservoir is obtained. If n is 2, the fracturing fluid system in the simulated fracturing scheme is a variable viscosity slickwater fracturing fluid system; if n is not 2, the fracturing fluid system in the simulated fracturing scheme is a low-concentration guar gum fracturing fluid system. Based on the real-time wellhead pressure, real-time microseismic information obtained in the (n-1)th round, and the fracture network morphology after well shut-in in the (n-1)th round, an unconventional fracture propagation model is used to predict the fracture network morphology corresponding to hydraulic fracturing in the nth round, according to the simulated fracturing scheme of the nth round. Based on the fracture network morphology, real-time wellhead pressure, and real-time microseismic information corresponding to hydraulic fracturing in the nth round, the well shut-in time for the nth round is determined. This aims to achieve balanced stimulation of deep coal reservoirs and improve EUR (Earnings Equivalent to Fluid Regulator).

This invention provides a multi-row horizontal well layered extraction device and method for natural gas hydrates. The device includes: a guide pipe; multiple evenly distributed interfaces on the lower side of the guide pipe from top to bottom, each interface being connected to a wellbore via a corrugated metal hose; multiple wellbores arranged in parallel; each wellbore being connected to an adjustment mechanism, which is mounted on the guide pipe and can adjust the vertical position of the corresponding wellbore. In this invention, the wellbore is connected to the guide pipe via a corrugated metal hose, therefore the connection between the wellbore and the guide pipe is not fixed. Furthermore, an adjustment mechanism for adjusting the wellbore position is provided. This adjustment mechanism allows for adjustment of the distance between the wellbores. When a wellbore layer fails, by reasonably adjusting the spacing between the wellbores, extraction can still be carried out on the failed layer.

The utility model provides a kind of broken material collecting device and mining machine, the bottom of hopper is provided with discharge port, power mechanism is set to the end of hopper, rotating shaft is rotatably set in hopper, and transmission connection with power mechanism, the outer surface of rotating shaft is equipped with the spiral structure for conveying material to discharge port, crushing assembly is set to the surface of rotating shaft. Through the above-mentioned broken material collecting device disclosed, rotating shaft is rotated by power mechanism, so that crushing assembly arranged on rotating shaft crushes material, and material is conveyed by the spiral structure of rotating shaft, so that crushed material is timely discharged through discharge port to realize continuous mining of material, compared with the existing mining equipment, the crushing system and material collecting device integrated design can not only reduce mining process, but also simplify the operation complexity and management difficulty of mining equipment, ensure the lump coal rate of coal, reduce mining cost, improve mining efficiency.

This application discloses a backfilling mining method, apparatus, medium, and equipment for gently dipping thick ore bodies, relating to the field of underground mining technology in metal mines. The method includes: dividing the ore body into mining units along its vertical strike and determining structural parameters; selecting an adjacent mining area from one wing of the ore body as the first mining unit; and constructing a coordinated layout for drilling, ore extraction, and connecting roadways. Using the first mining unit as the basic operational unit, it is divided into a central main ore body area and upper and lower hanging wall triangular areas, and mining is carried out using a zoned coordinated mining process. Subsequent mining units are set up with the same parameters. While mining a portion of the first mining unit, the mining process is simultaneously applied to the corresponding areas of subsequent units, achieving spatial cross-construction. After mining is completed in each area of ​​the first mining unit, backfilling is carried out promptly, reserving a runway riser as a free face for subsequent mining, and reusing existing roadways as operational and ore extraction channels, achieving cyclic mining from one wing of the ore body to the other.

The application discloses a kind of steep coal seam group horizontal segmentation and trend longwall mixed mining method, comprising: according to the stage height of thin coal seam single mining calculated and determined when coal seam slips or is destroyed opportunity;According to the segmentation height of thick coal seam, according to the space coordination requirement calculation, the space coordination requirement is, after thin coal seam is mined according to stage height single, the projection length of top contact caving length after thick coal seam is mined according to μ segmentation height stage is same in horizontal plane, caving zone and fracture zone and goaf overlap;According to the corresponding single mining progress, the thin coal seam and the thick coal seam are alternately mined.The stage height of thin coal seam single mining and the segmentation height of thick coal seam are quantitatively calculated according to coal seam slip or destruction opportunity, and thin coal seam and thick coal seam are alternately mined according to the requirement of space and time coordination, impact strata control, strata movement control and the coordination of mining efficiency improvement are realized.

The present application relates to a kind of data-driven mode under the method and system for predicting net pressure in fractured well fracture, comprising: collecting oilfield field data, and calculating fracture net pressure;Correlation between well logging parameters and fracture net pressure is calculated and screened, and the well logging parameters after screening are pretreated;Fracture net pressure prediction model is constructed, part of data set is input into fracture net pressure prediction model for training, and the hyperparameters of fracture net pressure prediction model are optimized;Optimized fracture net pressure prediction model is trained using all data sets;When obtaining incremental data, the trained fracture net pressure prediction model is used as submodel, the structure and parameters of submodel are replicated to generate new submodel, and submodel is trained to form submodel for different well sections;The comprehensive prediction value of all submodels is calculated.The present application effectively overcomes the limitation of traditional prediction method, significantly improves the prediction accuracy and model adaptability, and has important significance for oil and gas exploitation engineering.

This invention relates to a dynamic optimization decision-making model for the mining sequence of polymetallic symbiotic ore bodies, comprising an edge layer, a cloud platform, and a control terminal. The edge layer, cloud platform, and control terminal interact through dedicated interfaces, achieving a closed-loop process from data acquisition, processing, decision-making, to execution. The edge layer acquires ore body data in real time via a multi-source sensor network, preprocesses it through an edge computing terminal, and then uploads it to the cloud platform. The cloud platform uses a dynamic geological model engine to construct a real-time 3D ore body model and generates a Pareto optimal mining scheme that comprehensively considers economic, environmental, and safety factors through a multi-objective optimization engine. The control terminal uses a digital twin console to visualize the scheme and allow for manual intervention, while the equipment control system automatically executes mining commands. The model supports hourly dynamic updates, significantly improving resource recovery rate and decision-making efficiency, reducing environmental costs and mining risks, and achieving efficient, intelligent, and green mining of polymetallic symbiotic ore bodies.

The application discloses a multi-conveyor cross-distributed mining machine, which comprises a walking device for walking back and forth, and a conveying part comprising a left conveying machine, a right conveying machine and a transfer conveying machine arranged on the walking device. The left conveying machine and the right conveying machine are arranged in a left-right symmetrical "eight" shape. The discharge ports of the left conveying machine and the right conveying machine are close to each other and located above the walking device. The feeding port of the transfer conveying machine is located directly below the discharge ports of the left conveying machine and the right conveying machine and is used for transferring the mining materials on the left conveying machine and the right conveying machine. The transfer conveying machine is rotationally arranged on the walking device, and the position of the feeding port of the transfer conveying machine is fixed during rotation, and the position of the discharge port is changed. The application solves the problem of two-way coal conveying of the mining machine, avoids empty cutting during back and forth running, and improves the mining efficiency.

This solution provides an experimental testing device and method for steam electric heating in heavy oil extraction. The experimental testing device includes: a pressure-bearing assembly, which includes a cylindrical component for simulating the wellbore environment; a steam injection assembly capable of generating and outputting steam; a heating assembly capable of receiving and heating steam from the steam injection assembly and inputting the steam into the cylindrical component; and a measurement system assembly for detecting the temperature and pressure of the steam in the cylindrical component. Through the above technical solution, the experimental testing device for steam electric heating in heavy oil extraction provided by this solution has the advantages of small size, compact structure, wide applicability, and accurate measurement of steam properties under high temperature and high pressure conditions. It can accurately simulate the influence of parameters such as steam injection rate and steam injection temperature on steam heating efficiency during heavy oil thermal recovery.

The application provides a control coal feeder anti-surge bin device, which comprises a gate plate arranged at a feeding port of a coal bin, a hydraulic rod connected with the gate plate through pin shaft or welding connection to control opening and closing of the gate plate, a hydraulic station connected with the hydraulic rod through an oil pipe control circuit, and a moisture detector arranged inside the coal bin close to a coal feeder discharge port. The control coal feeder anti-surge bin device has the advantages of simple structure, convenient installation and improved work efficiency. When lifting raw coal with high moisture, the opening and closing size of the gate plate can be flexibly reduced to effectively reduce the risk of surge bin. Workers do not need to spend a lot of time to clean the outflowing coal, and the main shaft coal lifting work will not be interrupted due to the surge bin, so that the smoothness of the main shaft coal lifting process is ensured, and the overall efficiency of coal mining and transportation is improved.

This utility model discloses an oil tank device for a chain arm sawing machine used in coal mines and its hydraulic system. The oil tank device includes: a main oil tank installed above the machine platform; an auxiliary oil tank installed below the machine platform and between a pair of tracks of the traveling device; and an oil tank connecting assembly connecting the main and auxiliary oil tanks, ensuring their internal cavities are interconnected. This utility model's oil tank device for a chain arm sawing machine used in coal mines utilizes both a main and auxiliary oil tank to simultaneously store the oil required for hydraulic system circulation. This results in good oil heat dissipation, less fluctuation in system response, ensures normal system operation, reduces the maintenance frequency of the hydraulic system, and improves tunnel mining efficiency.

The utility model discloses a kind of coal mining early coal measures gas and geothermal joint development system, in specific use, according to reservoir resource condition, reservoir reworkability and stress sensitivity, determine perforating mode;Then implement the drilling of joint development well, well completion, perforating and hydraulic fracturing operation;Then by the cold water return pipe in wellbore injects cold water to the well bottom of joint development well, further to joint development well Drainage depressurization, heated cold water and reservoir original hot water are pumped out of ground through tubing, during this period, water injection is lower than water production, make well bottom pressure steady decline, coal measures gas then enters wellbore from reservoir, and is produced to ground through outer sleeve;Finally after coal measures gas development ends, continue to inject cold water to joint development well, and heated cold water and reservoir hot water are pumped out through tubing and carry out geothermal development.This application effectively solves the technical problem of low efficiency and low resource utilization rate of existing subsystem, separate target development mode.

This invention relates to the field of quarrying equipment, and discloses an infrared-guided quarrying system and method. The quarrying system includes a trackless walking mechanism, a robotic arm mechanism, a cutting mechanism, a first infrared component, and a second infrared component. One end of the robotic arm mechanism is hinged to the trackless walking mechanism, and the other end is connected to the cutting mechanism, driving the cutting mechanism to move. One of the first and second infrared components is an infrared receiver, and the other is an infrared transmitter. The first infrared component is located at one end of the ore to be mined, and the second infrared component is located at the front end of the trackless walking mechanism. The first and second infrared components work together to guide the trackless walking mechanism to move in a straight line. Advantages of this invention: It can reduce mining costs, improve mining efficiency, and allow for a smaller overall equipment size, reducing space occupation.