13results about How to "Reliable principle" patented technology

This invention relates to oil and gas field development technology and discloses a quantitative comprehensive evaluation method for the oil stabilization and water control effect of horizontal wells. The method includes: determining whether the target water control well is a producing old well or a new well; collecting relevant operating parameters of adjacent wells at the same oil column height and formation level before and after the application of the water control technology, based on whether it is a producing old well or a new well; collecting relevant parameters required for evaluating the economic benefits of water control in a single well; evaluating the impact of the water control technology on oil and water production by comparing the water production index and water cut, using indicators such as the effective period of water control, increased oil production, and changes in water production, and evaluating the water control effect; conducting a single-well water control economic evaluation based on the water control effect; and comprehensively evaluating the water control effect and economy of the horizontal well. Using the method provided by this invention, a quantitative comprehensive evaluation of the water control effect is conducted from the perspectives of increasing oil production, stabilizing oil production, controlling water, and economics, effectively evaluating the oil stabilization and water control effect and economy of horizontal wells, and effectively guiding the design of water control schemes and process selection.

The invention belongs to the technical field of artificial intelligence and network predictive maintenance, relates to a fault prediction method based on a multi-source migration echo state network, and aims to solve the problem of low prediction precision caused by insufficient early samples of a fault, and the method comprises the following steps: firstly, extracting migration knowledge from a plurality of historical fault source domains by using the echo state network; secondly, measuring the similarity between the source domains and the target domain and the difference between the source domains by adopting a dynamic time warping distance, and selecting a plurality of similar source domains with complementary information; then, a plurality of prediction sub-models are established in the target domain in combination with migration knowledge of the selected source domain, and a final prediction model is obtained through integrated learning; and finally, performing future value prediction on the key variables acquired in real time by using the model. According to the method, multi-source historical information can be fully utilized under the small sample condition, the fault prediction precision and generalization ability are remarkably improved, and the method is suitable for fault prediction scenes with multi-source time series data in industrial processes, mechanical equipment, power systems and the like.

The invention provides an oil-immersed transformer fault decision-making method and system based on a three-dimensional voiceprint map, and the method comprises the steps: collecting a voiceprint signal of a transformer body through a high-sampling-rate microphone array which is arranged in a standardized manner; an optimized decoding process based on improved inverse discrete cosine transform is innovatively adopted to construct a three-dimensional voiceprint map matrix containing time, frequency and sound intensity information, and the limitation of traditional single feature analysis is broken through; space-time alignment and fusion are carried out on the voiceprint map, the real-time load rate, the oil temperature and other multi-physical field data, a unified high-dimensional feature vector is constructed, and efficient processing and feature mining are carried out on the high-dimensional data through a light-weight sliding window feature extraction mechanism of depth separable convolution reconstruction. More sensitive and robust online diagnosis of early abnormal states and composite faults is realized, and model complexity and calculation burden are remarkably reduced through deep adaptation of a core algorithm and a hardware architecture.

This invention provides a method for optimizing mechanical water control technology in oil wells, relating to the field of oil and gas field development and exploitation technology. The method includes the following steps: S1: Screening wells for stable oil production and water control based on comprehensive geological reservoir data, well trajectories, and water control well selection requirements; S2: Collecting reservoir data and drilling / completion data for the target water control wells; S3: Evaluating the effectiveness of existing water control in production wells within the target block to determine the adaptability of the stable oil production and water control technology; S4: Optimizing the stable oil production and water control technology based on the adaptability of the block's stable oil production and water control technology and the water-bearing pattern along the horizontal section; S5: Selecting a compartmentalization method and arranging water control valves according to the selected stable oil production and water control technology; S6: Establishing a coupled numerical model of the wellbore and reservoir using numerical simulation software to simulate and predict changes in oil production and water cut due to water control; S7: Selecting an intelligent control method based on reservoir temperature; S8: Selecting a water production monitoring method based on the water production monitoring requirements along the flow path; S9: Evaluating the economic benefits of water control using an input-output ratio model.

This invention discloses a device and method for evaluating the self-healing performance of CCUS well cementing. In this device, a liquid injection unit and a gas injection unit are respectively connected to the cavity of a reaction vessel. A data acquisition unit is connected to the reaction vessel and collects relevant parameters within the reaction vessel's cavity. The data acquisition unit is connected to a data processing unit. A control unit is connected to both the data processing unit and the data acquisition unit. Self-healing cement samples and ordinary cement samples undergo pre-damage treatment. Then, breakthrough pressure tests are performed on the self-healing pre-damaged samples and the ordinary pre-damaged samples, respectively, to obtain the breakthrough pressure of the self-healing sample and the breakthrough pressure of the ordinary sample. If the breakthrough pressure of the self-healing sample is greater than that of the ordinary sample, the self-healing cement sample is judged to have the ability to self-heal microcracks. This invention is reliable in principle, convenient to operate, has a reasonable structure, and the testing process is simple and quick.

This utility model relates to an electroslag furnace feeding module, including an electroslag furnace. The feed inlet of the electroslag furnace is located at the top center. A hopper is fixedly installed at the feed inlet of the electroslag furnace. The hopper is equipped with water-cooling pipes inside. The top diameter of the hopper is larger than the bottom diameter of the hopper. The bottom of the hopper is coaxial with the feed inlet. A cover plate is detachably installed on the inner top of the hopper. A through-hole is provided at the top center of the cover plate. The through-hole is fitted with the feed bar with a clearance. The periphery of the cover plate is attached to the inner wall of the hopper. An insulating heat strip is bonded and fixed to the periphery of the cover plate. The insulating heat strip is composed of stacked porous silicon heat insulation films. A mounting hole with internal and external communication is provided at the bottom of the hopper. A nozzle is fixedly installed in the mounting hole. One end of the nozzle located on the outside of the hopper is connected to a flexible hose. The hose is covered with a high-temperature resistant insulating layer. The hose and nozzle work together to input argon gas into the inner bottom of the hopper and prevent air from entering.

This invention discloses a nuclear magnetic resonance (NMR) method for measuring the solid phase deposition of crude oil in porous media, belonging to the field of oil and gas reservoir development technology. By using a single saturation of crude oil in a core sample and leveraging the characteristics of online NMR technology, the method employs a comparison of experimental and NMR measurements, along with a 1:1 standard line reference, to determine the standard echo interval T in the transverse relaxation time T2 measurement acquisition parameters. E This method directly measures the amount of solid phase deposition in pore fluids in situ, solving the technical problems of existing technologies that cannot maintain the original characteristics of the sample, effectively avoid the interference of solid skeleton response and solid phase deposition particles, and are difficult to measure the solid phase deposition content of active oil in situ. It achieves the technical effect of rapid, efficient and accurate measurement of the amount of crude oil solid phase precipitation in cores under specific temperature and pressure conditions. The method is reliable in principle, simple to operate and highly applicable, and the test results are accurate and reliable, making it more suitable for the fine characterization needs of complex oil and gas reservoirs.

This invention relates to the field of oil and gas field fracturing technology, and particularly to an integrated device and method for horizontal well cluster-level fluid extraction, production measurement, and fracturing. The technical solution is as follows: a multi-nozzle pressure-controlled switch jet pump and a first packer are connected to the casing downhole via tubing. Within the horizontal section, a production measurement and fracturing control valve and a water hammer wave monitor are connected via tubing. The production measurement and fracturing control valve and the water hammer wave monitor are located between the second and third packers. The advantages are: by coordinating the multi-nozzle pressure-controlled switch jet pump with the production measurement pump core of the storage-type downhole jet pump, fluid extraction and formation production data can be measured in cluster-level sections of the horizontal well. Furthermore, by moving the positions of the production measurement and fracturing control valve and the water hammer wave monitor, fracturing operations can be performed on the corresponding cluster sections requiring modification. Simultaneously, water hammer wave data can be measured at close range. A single drilling run completes the functions of fluid extraction, production measurement, and fracturing, resulting in low construction costs and high measurement accuracy.

The invention discloses a coaxial double-motor slip-ring-free winding rotor direct connection slip excitation asynchronous power generation system, and belongs to the technical field of wind power generation. The system adopts a coaxial direct connection structure, the main generator (DF) and the auxiliary excitation motor (DJ) operate coaxially, and the capacity of the excitation motor is 25% of that of the main generator. Two rotors are axially and directly connected, and excitation energy is provided by the slip of the excitation motor. The number of turns of the excitation motor rotor winding is set to be larger than that of the generator rotor winding, so that the flow direction of excitation current is reasonable. The double generators run coaxially, the exciter is driven, the generator generates power, frequency, voltage and phase are stabilized automatically by means of electromagnetic negative feedback, and power frequency sine wave electric energy meeting the network access condition is directly output. A traditional IGBT and a high-power converter device are omitted, the system failure rate is reduced, the equipment number complexity and the manufacturing cost are remarkably reduced, the cost per kilowatt-hour is greatly reduced, and the device has the advantages of being free of slip rings, high in abrasion efficiency, long in service life, capable of being connected to and disconnected from a grid and capable of being used in a micro-grid.

The application relates to the technical field of laser melting forming, in particular to a method for detecting micron-level special-shaped surface structures, which comprises the following steps: step 1, producing standard samples in the same batch in a part processing process, the special-shaped structure size and distribution of the surface of the standard samples are completely consistent with those of other parts; step 2, manufacturing a standard block; step 3, comparing the roughness of the standard sample to be detected and the standard block; step 4, using a three-dimensional profilometer to count the number of special-shaped structures in the standard block specification range at different positions of the standard sample, and comparing the number with that of the standard block; and step 5, according to the comparison results of the roughness and the number of convex structures, determining whether the micron-level special-shaped surface structures meet the design standards. The application has the advantages of reliable principle, strong operability and economy, can effectively detect the effectiveness of the textured structure of an ion thruster discharge chamber part, ensure that the ion thruster discharge chamber can effectively inhibit the peeling of the redundant material film layer, and ensure the reliability of the long-life ion thruster at the end of the service life.

The application discloses a kind of UHV flexible valve group connecting line voltage measurement abnormality detection and switching method, comprising, obtaining control device valve group connecting line voltage measurement value UDM, redundancy device valve group connecting line voltage measurement value UDM_OSYS and abnormality detection auxiliary judgment value UV, obtain the intermediate size value UMID in three;When the difference between UDM and UMID is greater than the first reference value UREF1, and lasts the first delay time T1ref, it is considered that control device valve group connecting line voltage measurement value UDM is abnormal;Redundancy device valve group connecting line voltage measurement value UDM_OSYS or the connecting line voltage value UDMCAL calculated based on the measured electrical quantity of control device is used as the connecting line voltage measurement value UDM0 of control device.The application detects redundancy device valve group connecting line voltage measurement value and abnormality detection auxiliary judgment value to realize the detection of control device valve group connecting line measurement value abnormality, and switches to correct value, maintains system stable operation, principle is reliable, and realization is simple.

The invention discloses a multi-terminal direct current system and a configuration method, a control method and a control device thereof, and the configuration method comprises the steps: configuring alternating current energy consumption in a new energy sending end converter station; the direct-current energy consumption is configured in each receiving-end converter station; the direct-current circuit breakers are arranged on the sides, close to the trunk line, of the branch lines, and the trunk line is not provided with the circuit breakers. The control method comprises the following steps: when a DC line fault occurs in a branch line, action is performed according to a device connected with the branch line; after arc extinction of the direct-current line, restarting and boosting the active step-down converter station, and reclosing the tripped circuit breaker; and after a specified number of times is repeated, when the converter station fails to restart, the converter station of the branch line where the DC line fault is located is locked, the circuit breaker of the branch line where the DC line fault is located is disconnected, and the power is adjusted. According to the invention, AC and DC overvoltage suppression after fault ride-through or locking of the modular multi-level converter is realized, and the operation requirement of a system for sending out new energy through a flexible DC island is met.

The invention discloses a hydrogen energy aircraft fuel cell system emergency inerting system and method based on vortex tube quick-acting nitrogen generation, and belongs to the technical field of hydrogen energy aviation safety, the system comprises an emergency liquid hydrogen supply unit, a vortex tube quick-acting nitrogen generation unit and a gas release unit; the emergency liquid hydrogen supply unit is used for providing high-speed hydrogen jet flow; the vortex tube quick-acting nitrogen generation unit comprises a vortex tube which is provided with a driving gas inlet, a separated gas inlet, a cold end outlet and a hot end outlet; the gas release unit is arranged in the fuel cell equipment compartment and is used for releasing gas; the emergency liquid hydrogen supply unit is connected with a driving gas inlet of the vortex tube, a separated gas inlet of the vortex tube is communicated with the internal space of the fuel cell equipment compartment or a preset gas inlet duct, and a cold end outlet of the vortex tube is connected with the gas release unit. The device has the advantages of high response speed, self-supply of energy and raw materials, simple structure, reliable principle and the like.