375 results about "Oil viscosity" patented technology

The invention discloses a steam turbine fault diagnosis method and system based on a knowledge graph, and the method comprises the following steps: S1, synchronously collecting the vibration signal, the iron abrasive particle concentration, the oil viscosity and working condition parameters of a steam turbine bearing in a steam turbine, and relates to the technical field of steam turbine fault diagnosis. In order to solve the problems that a turbine bearing serving as a core rotating part is prone to abrasion faults, and early abrasion such as surface microcracks and oil film degradation concealment is high, vibration signals, iron abrasive particle concentration, oil viscosity and working condition parameters are synchronously collected to generate multi-source data streams with aligned timestamps, nonlinear feature extraction is combined, and a multi-source data stream with aligned timestamps is obtained. By constructing the initial knowledge graph, mapping the extracted features to the initial knowledge graph and generating the dynamic knowledge graph based on the graph neural network, time sequence reasoning of the bearing abrasion state is achieved, so that the early abrasion features of the turbine bearing can be obtained, and early warning is conducted according to the early abrasion features of the turbine bearing.

The utility model relates to the technical field of metering instruments, in particular to an oil online viscosity and density sensor which comprises a mounting seat, a defoaming detection mechanism is arranged below the mounting seat, the defoaming detection mechanism comprises a mounting plate arranged below the mounting seat, and a micro pump is fixedly connected to the top end of one side of the mounting plate. The output end of the micro pump is fixedly connected with a transfer pipe, the end, away from the micro pump, of the transfer pipe is fixedly connected with a working box, the working box is fixedly connected to the top end of the center of the mounting plate, a filter plate is arranged above the working box and fixedly connected to the inner side wall of the transfer pipe, and a plurality of sets of filter holes are formed in the filter plate; the top end of the filter plate is fixedly connected with a plurality of groups of defoaming thorns. According to the utility model, through the cooperation of the mounting seat and the bubble-removing detection mechanism, the micro pump sucks oil into the transfer pipe and then transfers the oil into the working box, and bubbles in the oil are punctured by the bubble-removing thorns, so that the bubbles are prevented from influencing the subsequent measurement precision.

The invention discloses a new energy automobile speed reducer efficiency optimization system based on multi-physics field coupling, and belongs to the technical field of new energy automobiles. The system constructs a structure-heat-fluid multi-physics field intensity coupling simulation model: firstly, the structure-heat model calculates friction heat generated by gear engagement based on a finite element method; then, the heat source is input into a heat-fluid sub-model to calculate a whole machine temperature field and oil stirring loss; the key point is that the temperature field can perform bidirectional feedback to update material attributes, lubricating oil viscosity and thermal deformation in real time, and a high-fidelity coupling solution is obtained through iterative solution. Based on the precise model, the system adopts intelligent optimization methods such as a genetic algorithm to carry out iterative optimization on variables such as gear parameters or lubricating oil viscosity, and outputs a design combination enabling the comprehensive efficiency to be optimal. According to the invention, the strong coupling effect among force-heat-fluid is accurately simulated, the deviation of traditional decoupling analysis is overcome, and the efficiency of the speed reducer and the energy efficiency of the whole vehicle can be systematically improved.

The invention discloses a paper-plastic mold positioning auxiliary system capable of monitoring hydraulic pressure in real time through an AI. The paper-plastic mold positioning auxiliary system comprises an AI control center, a hydraulic monitoring unit, an air pressure monitoring unit, a positioning auxiliary execution unit, an abnormity protection unit and a data acquisition and transmission module. The hydraulic monitoring unit is used for collecting hydraulic oil cylinder pressure, temperature, hydraulic oil viscosity and equipment operation duration data; the air pressure monitoring unit collects air pressure, flow and valve delay time data of a pipeline valve; the data acquisition and transmission module transmits data to the AI control center, and the AI control center analyzes abnormity through a model and calculates a correction amount; the positioning auxiliary execution unit coordinates the positioning of the servo motor and the hydraulic oil cylinder; and the abnormal protection unit receives the early warning and starts a protection action. The system solves the problems of hydraulic monitoring lag and the like, realizes hydraulic and air pressure cooperative monitoring and positioning compensation, ensures production coherence and equipment safety, and is adaptive to automatic production of paper-plastic molds.

The invention discloses a pumping unit intelligent lubrication decision making system and method based on multi-source data fusion, and the system obtains multi-source data, such as the rotating speed, the torque, the oil temperature and the oil pressure, and the viscosity, the pH value and the water content of lubricating oil, during the operation of a pumping unit through a multi-source data collection unit, and carries out the processing through a data transmission and preprocessing unit. Data features are deeply mined by means of an improved multi-layer perceptron feature extraction unit, feature fusion is carried out on data of an optimized Transform model fusion unit and a historical data storage unit, and a lubrication decision model construction unit constructs correlation models of lubricating oil viscosity, lubrication period and the like based on the fused features. And finally, the lubrication decision execution unit outputs and executes a decision instruction. The method executes the steps of data acquisition, processing, feature extraction, fusion, model construction and decision execution corresponding to each unit of the system. The problems of lubricating oil waste and insufficient lubrication are avoided, and the operation efficiency and the intelligent operation and maintenance level of the pumping unit in oilfield exploitation are remarkably improved.

The invention relates to the technical field of electromechanical hydraulic systems, and particularly discloses a low-temperature cold start control method based on high-frequency injection, which comprises the following steps: analyzing a motor state, and carrying out observation and feed-forward compensation on disturbance caused by the motor state to a load torque and a viscosity coefficient through a sliding mode observer algorithm; according to the motor state, obtaining a state equation, constructing an extended sliding mode observer equation, deriving to obtain an observer error equation, and observing the load torque; analyzing the obtained load torque, wherein the motor load torque reflects the oil viscosity; high-frequency current injection, injection frequency control, skin effect enhancement and current amplitude control are carried out in a low-temperature state according to an oil viscosity result, copper loss and a high-frequency magnetic field eddy current effect are used for assisting heat generation, and according to a final oil viscosity result, when electromagnetic heat generation viscosity is reduced and a load is reduced, an injection voltage amplitude is gradually reduced. And after a normal starting condition is reached, switching to normal id = 0 control.

The application discloses a thickened oil viscosity reducer for a main viscosity contribution component of colloid and a preparation method thereof. The thickened oil viscosity reducer comprises the following components in percentage by weight: diethylene glycol methyl ether 25-35%, propylene glycol formate 15-25%, dispersant 5-8%, chelating agent 2-4%, anti-coking agent 0.5-1%, anti-swelling agent 1-2% and corrosion inhibitor 1-2%; and the balance is water. The application is a polar + non-aromatic hydrocarbon solvent system; completely avoids high-risk substances such as nonylphenol polyoxyethylene ether, petroleum sulfonate sodium and organic chlorine; is designed in pertinence and can effectively inhibit metal-induced asphaltene bridging; can withstand working conditions from normal temperature to 250 DEG C and up to 300 DEG C; thermal stability is significantly enhanced, and residual carbon after aging is lower than 8%; viscosity reduction efficiency is higher; the system is more stable, flexible in compounding and suitable for field construction.

The invention discloses a thermal management control method for a hydraulic hybrid power system of a mining vehicle in order to solve the technical problem that multi-power-source coupling optimization and an energy control strategy are poor, and belongs to the technical field of underground vehicle thermal management. According to the method, data such as real-time temperature, pressure, methane concentration and hydraulic oil viscosity are collected through a sensor module; the reference temperature threshold value is dynamically adjusted according to the methane concentration to obtain the maximum allowable temperature, the opening degree of a flow valve of a cooling system is adjusted through a dynamic PID algorithm when the real-time temperature exceeds the limit, and PID parameters are adjusted in real time along with the viscosity of hydraulic oil; and after a data error is compensated by adopting a least square method, a specific enthalpy and a specific entropy of a key node are calculated by utilizing a ratio algorithm, a physical ratio is deduced, and an abnormal node is positioned. Through cooperative control of thermal management and hydraulic mixing, the energy efficiency and safety bottlenecks are overcome, the energy utilization efficiency is improved, and technical support is provided for low-carbon transportation of mines.

The invention relates to the technical field of heavy oil reservoir exploitation, in particular to a device and a method for realizing viscosity-reducing huff-puff exploitation of heavy oil by injecting natural gas into a well and pressurizing. According to the technical scheme, a gas supply pipeline is tripped into an annular space between a sleeve and a pump cylinder, the upper end of the gas supply pipeline is connected with a natural gas injection device on the ground, and the lower end of the gas supply pipeline is communicated with a gas inlet of an underground natural gas booster pump; a gas injection packer is installed on the lower middle side of a pump cylinder, an oil inlet hole is formed in the pipe wall of the lower side of the gas injection packer, and the lower end of the gas injection packer is connected with an underground natural gas booster pump through a transition adapter. The device has the advantages that the pressure of natural gas can be increased in a relay mode, the natural gas is dynamically mixed and dissolved in thickened oil, the viscosity of the natural gas is remarkably reduced, the natural gas is increased along with volume expansion, flowing to a shaft is facilitated, in addition, the foam oil effect can be formed, and the functions of reducing viscosity and increasing yield of a thickened oil reservoir are achieved; and the total operation cost is lower than the steam thermal recovery cost, and the safety is also greatly improved.

The invention discloses a method for predicting the remaining service life of a control moment gyroscope based on parameter fusion, and relates to the technical field of health management of spacecraft attitude control systems. According to the method, optimal fusion of measurement parameters and implicit parameters is realized through adversarial learning feature extraction and a channel attention mechanism, and the method is particularly suitable for high-precision residual life prediction of the spacecraft control moment gyroscope under variable working conditions. The method comprises four main steps of data preparation and multi-source input, adversarial learning feature extraction, SE-Attention feature fusion and three-stage training optimization. In the data preparation step, original time sequences of voltage and current of a rotor motor are collected through a built-in electrical sensor of a CMG, and key physical parameters of a full-film lubrication friction coefficient, lubricating oil viscosity, a bearing clearance and contact stiffness are inverted based on an electromechanical coupling model; in the adversarial learning step, a game framework of a feature extractor and a working condition discriminator is constructed, and working condition-independent robust feature extraction is realized through a gradient inversion layer; in the SE-Attention feature fusion step, importance weights are adaptively distributed to different feature channels through an extrusion-excitation mechanism; and the three-stage training optimization step adopts a preheating-confrontation-fine tuning strategy to ensure the network convergence. The method solves the problem of domain adaptation, has the technical advantages of strong robustness, high precision, strong generalization, interpretability and self-adaptation, and can realize high-precision RUL prediction under variable working conditions.

The invention belongs to the field of oilfield chemistry, and discloses a surfactant composition for improving recovery efficiency through tertiary oil recovery steam thermal recovery, and a preparation method and application thereof. The surfactant composition comprises alpha-olefin sulfonate (AOS) as shown in a formula (2), a betaine surfactant with a polyether fragment as shown in a formula (2), a polyether anionic surfactant as shown in a formula (3) and water, formula (3): # imgabs0 # R7O-(CH2CH2O) m1-(CH (CH3) CH2O) n1-(CH2CH2O) m2-R8COOM, and formula (4): (4): (4): (4): (4): (4): (4): (4): (5 The surfactant composition provided by the invention is suitable for tertiary oil recovery steam thermal recovery, has strong foaming ability, good foam thermal stability and relatively high salt resistance, is particularly stable when meeting divalent ions, can meet the recovery requirements of high-temperature and high-mineral-degree thickened oil, can reduce the viscosity of the thickened oil and extra-thickened oil, can reduce the interfacial tension, and can improve the recovery efficiency of the thickened oil and extra-thickened oil. And the recovery efficiency of thermal recovery of thickened oil is improved.

The invention belongs to the technical field of tertiary oil recovery, and particularly relates to a temperature-resistant and salt-resistant thickened oil viscosity-reducing oil-displacing agent as well as a preparation method and application thereof. The preparation method comprises the following steps: adding nonyl phenol, DMF (Dimethyl Formamide) and epoxy halopropane into a reactor, stirring and dissolving, carrying out a heat preservation reaction, and carrying out reduced pressure distillation to obtain a viscous solid; adding isopropanol into the viscous solid for dissolving, adding 8-aminonaphthalene-1, 3, 6-trisulfonic acid disodium salt, heating and refluxing for reaction, and performing reduced pressure distillation to obtain a viscous solid; and adding distilled water, heating for dissolving, filtering, adjusting the pH value, separating out solid, standing, separating out supernate, centrifuging the lower-layer solid, concentrating, and drying to obtain the product, namely the viscosity-reducing oil-displacing agent for the thickened oil. The viscosity-reducing oil-displacing agent for the heavy oil has the characteristics of low surface and interface tension, low critical micelle concentration and good viscosity-reducing effect.

The invention relates to the technical field of viscosity detection, in particular to lubricating oil viscosity detection equipment which comprises a base fixedly connected with a barrel and further comprises a stirring viscosity measuring mechanism connected with the base, the stirring viscosity measuring mechanism comprises a lifting adjusting mechanism, the lifting adjusting mechanism is connected with a telescopic rotating mechanism, and the telescopic rotating mechanism is connected with the barrel. A protective shell is fixedly installed at the end of the telescopic rotating mechanism, a first motor is fixedly installed in the protective shell, an output shaft of the first motor is fixedly connected with a rotating disc, the rotating disc is rotationally connected with the protective shell, the rotating disc is fixedly connected with a fixing plate, the fixing plate is fixedly connected with a resistance sensor, and the lower end of the fixing plate is fixedly connected with a scraping strip. And the deoiling mechanism is connected with the lifting adjusting mechanism. According to the device, the viscosity of lubricating oil is measured in a mode that the stirring viscosity measuring mechanism is matched with the oil removing mechanism, and then the device is automatically subjected to liquid spraying and scrubbing operation for removing oil stains, so that automatic measurement and automatic cleaning are realized, and the detection efficiency is improved.

The invention provides a coal mill oil way plate and a reversing control device thereof, and relates to the technical field of coal mill oil way plates, the coal mill oil way plate comprises a valve block body, a proportional overflow valve, a duplex electromagnetic reversing valve group, a working oil way group, two hydraulic control one-way valve groups, two energy accumulators, a safety overflow valve, an online particle counter and a spiral cooling flow channel. The redundancy design of the duplex electromagnetic directional valve group improves the reliability of the system, so that the system can still be operated when a single valve fails, the hydraulic control one-way valve group realizes mechanical locking of an oil cylinder and can prevent a grinding roller from falling off during power failure, and the energy accumulator is connected with a working oil duct through a connector to absorb pressure impact and compensate leakage, so that the stability of loading pressure is maintained, and the reliability of the system is improved. The on-line particle counter gives an early warning of oil pollution in real time, hydraulic faults can be reduced, the spiral cooling flow channel is matched with the semiconductor temperature control piece to adjust the oil temperature, and the problem of pressure drift caused by oil viscosity fluctuation under high and low temperature working conditions is solved.

The invention provides a hydraulic cooler double-bypass-valve pressure self-adaptive adjusting method and system, and relates to the technical field of hydraulic systems.The method comprises the steps that a fluctuation trend characteristic value is calculated by reading pressure data, characteristic matching is carried out to generate an adjusting instruction, temperature and flow data are collected in real time in a monitoring period, and oil viscosity and Reynolds number are calculated; and when a flow state transition control mode is entered, calculating an optimal flow velocity based on a pressure gradient, converting the optimal flow velocity into a double-bypass valve target opening degree combination, and establishing a mapping relation between an opening degree value and a pressure response by utilizing a steady-state working condition database. Accurate pressure control of the hydraulic system is achieved, and the stability of the system is improved.

The invention discloses a thickened oil viscosity measuring device, and relates to the technical field of thickened oil viscosity detection. Comprising a base, a collecting cylinder is arranged on the base, detection cylinders are arranged on the base in an array mode, and oil discharging valves are arranged on the detection cylinders; a lifting mechanism is arranged on the base, the lifting mechanism comprises a lifting seat, rotor mechanisms are arranged on the lifting seat in a sliding and array mode, radial stirring mechanisms and fixing mechanisms are arranged in the rotor mechanisms, a filter plate and a bottom plate are arranged in the detection cylinder, and a clamping mechanism is arranged on the detection cylinder and used for fixing the filter plate and the bottom plate; a scraping mechanism is arranged at the bottom end of the lifting seat and is used for scraping the filter plate and the bottom plate; a mounting frame is connected to the lifting seat, and a driving mechanism is arranged on the mounting frame and used for driving the rotor mechanisms; the device can be used for measuring the viscosity of the thickened oil, is rich in function, can be used for pretreating the thickened oil, and is convenient in subsequent maintenance.

The invention relates to the technical field of oilfield chemistry, and discloses an emulsifier, a response agent, a thick oil viscosity reduction method and application. The emulsifier is prepared from nano aluminum oxide, zwitterionic polyacrylamide and alkyl diethylenetriamine according to the mass ratio of 1 to (0.1 to 3) to (7 to 25); wherein the average particle size of the nano aluminum oxide is 30 to 300 nm. When the emulsifier provided by the invention is used for reducing the viscosity of the heavy oil, a stable emulsion can be obtained in the presence of CO2, quick demulsification can be realized by discharging CO2, the stability and quick response effect can still be kept after multiple cycles, and the emulsifier is particularly suitable for reducing the viscosity of the heavy oil.

The invention provides a multi-mode temperature control method and device, a vehicle and a computer readable storage medium, and relates to the technical field of temperature control, and the method comprises the steps: obtaining the real-time temperature values of a plurality of regions in a speed reducer, and the temperature of a reference temperature measurement point of an oil pool region at the bottom of the speed reducer; calculating a thermal field gradient difference value; when any thermal field gradient difference value is larger than a preset temperature gradient threshold value, the initial rotating speed of the oil pump motor is subjected to compensation adjustment according to the thermal field gradient difference value, and the compensation rotating speed is obtained; the oil viscosity value of the speed reducer is obtained, and when the oil viscosity value is smaller than a preset viscosity threshold value, the compensation rotating speed is further subjected to compensation adjustment, and a target rotating speed is obtained; controlling the oil pump motor to operate according to the target rotating speed to adjust the flow speed of cooling liquid flowing to the speed reducer, and achieving temperature regulation and control of the speed reducer. According to the method, the temperature field distribution characteristics and the oil physical state are combined to perform double compensation on the initial rotating speed, and temperature regulation and control are performed on the speed reducer based on the compensated target rotating speed to realize effective heat dissipation.

The invention discloses an automatic control method for equipment in a hydraulic station, and particularly relates to the technical field of automatic control of equipment, potential faults of main equipment are found in time by collecting operation data of a main hydraulic pump and conducting fault prediction, and the preloading process of a standby hydraulic pump is started according to the fault occurrence time; oil viscosity abnormal information and load increasing stability information in the pre-loading process of the standby hydraulic pump are obtained, and an oil viscosity abnormal coefficient and a load increasing stability coefficient are calculated based on the information, so that the stability of the standby pump in the switching process is effectively evaluated, the working state of the standby pump is comprehensively analyzed, potential loading hidden dangers are recognized in advance, and the working efficiency of the standby pump is improved. And corresponding control is carried out through output of the risk model, equipment failure or system instability caused by improper switching is avoided, the switching risk of the standby hydraulic pump is dynamically judged according to comparison of the standby switching hidden danger risk index and the preset threshold value, and stable operation and seamless switching of the hydraulic system are ensured.

The invention discloses a new material rolling oil viscosity detection device, and relates to the technical field of new material rolling oil detection, the new material rolling oil viscosity detection device comprises a heating seat and a suction assembly, the top of the heating seat is provided with a water bath cylinder, the top of the water bath cylinder is provided with a top cover, the top of the top cover is fixedly provided with a motor, and the output shaft of the motor is connected with a driving gear. Switching of the three-way valve and linkage of the suction mechanism can be synchronously completed through simple operation of pushing and pulling the adjusting plate, in the pushing process of the adjusting plate, the toothed plate and the adjusting gear are meshed to drive the valve rod to rotate, the three-way valve is communicated with the capillary viscometer and the suction pipeline, and meanwhile the speed reducer reduces the speed and increases the torque to drive the piston to reciprocate to form stable negative pressure; continuous suction is achieved by matching with the design of two sets of one-way valves, when the adjusting plate is pulled back, the three-way valve automatically resets to be communicated with the atmosphere, additional operation devices are not needed in the whole process, the tedious process of repeatedly switching air suction equipment in traditional detection is remarkably simplified, and the suction rate is accurately controlled through the speed reducer.

The utility model belongs to the technical field of lubricating oil viscosity testing, particularly relates to a lubricating oil viscosity testing device with a heating and cooling structure, and aims to solve the problems that a certain amount of bubbles are formed in the stirring process due to the fact that bubbles exist in lubricating oil of an existing oil viscosity testing device, and the detection result is affected. According to the scheme, the oil tank comprises an oil tank body, a lubricating oil defoaming and stirring assembly and an oil tank heating and cooling assembly, and the lubricating oil defoaming and stirring assembly and the oil tank heating and cooling assembly are located in the oil tank body; through the arrangement of the lubricating oil defoaming and stirring assembly, rotation of the rotating drum and the rotating plate is combined with defoaming holes and defoaming thorns, efficient defoaming of lubricating oil is achieved, the test accuracy is improved, and the problems that bubbles exist in existing lubricating oil, a certain amount of bubbles are formed in the stirring process, and the stirring efficiency is high are solved. The existence of the bubbles can influence the detection result, so that the detection result has deviation, and the result obtained by multiple times of detection is unstable.

The invention provides a catalytic viscosity reduction system for improving interfacial tension of super-heavy oil and a preparation method of the catalytic viscosity reduction system. The viscosity reduction system comprises the following components in parts by weight: 0.5-1 part of a poly-surfactant, 0.5-2 parts of a nano-copper catalytic system, 0.5-1 part of fatty alcohol-polyoxyethylene ether, 0.2-0.4 part of polyethylene glycol, 0.1-0.5 part of a modified nano-surfactant and 100 parts of water. On one hand, emulsification viscosity reduction is achieved through the synergistic effect of the poly-surfactant and the fatty alcohol-polyoxyethylene ether, and on the other hand, metal catalytic cracking viscosity reduction is conducted through the nano-copper catalytic system, so that the viscosity of the thickened oil is greatly reduced, the thickened oil has the high viscosity reduction rate at the low temperature and the high temperature, and the viscosity reduction rate is 96% or above according to indoor evaluation. The interfacial tension is reduced by compounding the nonionic surfactant fatty alcohol-polyoxyethylene ether and ethylene glycol, and the oil-water interfacial tension can be reduced to 10 <-2 > mN / m or below through the synergistic effect of the surfactant and the modified nano-surfactant, so that oil-in-water emulsion is favorably formed, the viscosity reduction effect is improved, and the fluidity of crude oil is improved.

The invention relates to a mixed oil viscosity prediction method based on a residual physical guidance neural network, and relates to the technical field of oil and gas gathering and transportation. The method comprises the following steps: acquiring crude oil samples mixed in different proportions, acquiring a component characteristic factor and viscosity high-correlation data set, and performing sample enhancement through a generative adversarial network (GAN) to generate synthetic data conforming to a physical law; processing time sequence data by adopting a gating cycle unit (GRU), and optimizing network hyper-parameters by utilizing an adaptive genetic algorithm (AGA); constructing a residual physical guidance neural network (PGNN) model, and combining physical model output with deep learning residual correction; and finally, dynamic prediction and visual output of the viscosity of the mixed oil are realized. The method effectively solves the problems that a traditional empirical formula is insufficient in precision, a pure data driving model is poor in generalization ability and inconsistent in physics, is suitable for real-time viscosity soft measurement and closed-loop control under the complex oil mixing working condition, and is beneficial to efficient transportation of mixed crude oil.

The utility model discloses an oil-gas mixed transportation double-suction double-screw pump which comprises a pump body, a left-right through inner shell is arranged in the pump body, a driving shaft and a driven shaft which are parallel to each other are arranged in the inner shell in a penetrating mode, the rear ends of the driving shaft and the driven shaft are meshed after penetrating through the pump body in a sealing and rotating mode, and the front ends of the driving shaft and the driven shaft are arranged on the pump body in a sealing and rotating mode. Two blocking rings are arranged between the outer wall of the inner shell and the inner wall of the pump body in a bilateral symmetry mode, a plurality of discharging ports are formed in the position, located between the two blocking rings, of the inner shell, the positions, located in the inner shell, of the driving shaft and the driven shaft are each sleeved with a left-right two-way spiral sleeve, the two left-right two-way spiral sleeves are meshed, and an inlet shell is arranged outside the pump body. Inlet holes communicated with the inlet shell are formed in the positions, located on the outer sides of the two blocking rings, of the outer wall of the pump body, and outlet holes are formed in the positions, located on the inner sides of the two blocking rings, of the outer wall of the pump body. According to the oil-gas mixed transportation double-suction double-screw pump, when the oil viscosity is increased, the volume efficiency is improved by reducing leakage, and therefore the efficiency of the screw pump is improved.

The invention discloses a temperature-resistant salt-resistant viscosity-reducing oil-washing plugging agent for offshore oilfield thickened oil thermal recovery and a preparation method thereof. The preparation method comprises the following steps: putting an anionic surfactant, a nonionic surfactant and a natural surfactant into a compounding kettle, mixing with tap water, and stirring at a low speed until the solution is transparent and clear; and adding a salt-resistant stabilizer, a temperature-resistant stabilizer, a complexing agent and an auxiliary agent into the compounding kettle, stirring at a low speed, taking out of the kettle, and obtaining the viscosity-reducing oil-washing plugging agent after foams disappear completely. According to the invention, high foaming performance, high thick oil viscosity reduction performance, temperature resistance and salt resistance are combined, so that one agent has multiple functions; the temperature-resistant and salt-resistant viscosity-reducing oil-washing plugging agent for the offshore oilfield heavy oil thermal recovery is formed by adopting a single agent with high foaming performance and a single agent with high viscosity reducing performance as main agents and an auxiliary agent with temperature tolerance, salinity tolerance function improvement and mutual solubility enhancement functions as auxiliary agents in the aspect of selection of single agents in the formula. The invention further discloses a preparation method of the temperature-resistant and salt-resistant viscosity-reducing oil-washing plugging agent for the offshore oilfield heavy oil thermal recovery.

A device for reducing viscosity and dissolving incrustations in pipelines comprising a central tube comprising two ends and one or more external threads at the two ends for coupling, a conical reduction, a protective jacket, and one or more spacer rings. The central tube is fixed to an orifice of the conical reduction by one or more weld fillits. The conical reduction comprising one or more permanent magnet collars and are internal to the protective jacket, the protective jacket is fixed to the conical reduction via a hole fully penetrating the one or more weld fillits. The one or more spacer rings, without a megnetic field dress the central tube, positioned juxtaposed to the one or more permanent magnet collars so that the ends of the one or more spacer rings are fixed to the central tube to preserve the location of the one or more spacer rings.

The application discloses a kind of bifunctional thick oil catalytic viscosity reduction system and viscosity reduction method, bifunctional thick oil catalytic viscosity reduction system is adjusted to be the catalytic-emulsion composite viscosity reduction system of mixed catalyst, oxidizing agent after using surfactant, wherein, catalyst is amphiphilic TM / C-NH2 Nanoparticle, the oxidizing agent is organic peroxide.Catalytic-emulsion composite viscosity reduction system is mixed with thick oil and heated to reservoir environmental temperature reaction after, reaction is completed after finishing to thick oil viscosity reduction.The application is configured into the catalytic-emulsion composite viscosity reduction system of water-in-oil by organic peroxide oxidizing agent compound emulsifier, in reservoir environment (50~180 DEG C), using the catalytic oxidation performance of catalyst viscosity reduction system and catalyst and oxidized oil oxygen-containing group adsorption self-assembly function, realize thick oil macromolecule depolymerization and wettability reverse, further improve the viscosity reduction efficiency.

The invention provides an engine oil pressure control method and device, a vehicle and a storage medium, and relates to the technical field of engine lubricating systems. According to the method, on the basis of the engine oil viscosity of the engine at the current moment, the surface movement speed of each friction pair in the engine and the preset minimum oil film thickness of each friction pair, the theoretical minimum engine oil pressure of a main oil duct is calculated, the system oil supply pressure is reduced as much as possible on the premise that lubrication safety is guaranteed, the driving power of an engine oil pump is remarkably reduced, and the service life of the engine is prolonged. The fuel economy of the engine can be improved; then, the theoretical minimum engine oil pressure is adjusted in combination with future working condition information of the vehicle, the target engine oil pressure is obtained, the target engine oil pressure has perspectiveness, upcoming load changes can be responded in advance, and the pressure fluctuation problem under the transient working condition is effectively relieved; and finally, according to the deviation between the target engine oil pressure and the actual engine oil pressure of the main oil duct, the displacement of the engine oil pump is adjusted, and closed-loop accurate control over the engine oil pressure is achieved.

The invention relates to the technical field of oilfield chemistry, in particular to a nano-composite viscosity reducer, a preparation method, application and a high-viscosity thick oil viscosity reduction method. According to the preparation method, the nano composite viscosity reducer is prepared from a surface-modified nano oxide and an amphiphilic polymer through a solvent exchange method; the nano oxide is nano silicon dioxide nano particles, zinc oxide nano particles or ferric oxide nano particles, and the amphiphilic polymer is a partial esterification product of a styrene-maleic anhydride copolymer or an octadecyl acrylate-methacrylic acid copolymer. According to the preparation method, the viscosity reducer not only can efficiently disassemble a colloid asphaltene network structure, but also has a certain catalytic modification function, does not influence subsequent treatment of crude oil, and has the advantages of high viscosity reduction efficiency, lasting effect, no formation of stable emulsion, shear resistance, good temperature resistance, strong universality and the like.

The oil filling equipment comprises an oil tank placing main body, an oil tank main body and a control center, an oil tank fixing mechanism is arranged at the top of the oil tank placing main body, and the oil tank main body is limited and fixed through the oil tank fixing mechanism and is slidably connected to the top of the oil tank placing main body; an oil pump for conveying oil to the transformer is mounted on the outer surface wall of the oil tank body; a limiting metal block and a fixing base are arranged at the top of the oil tank body, a control center connecting mechanism is arranged on the fixing base, the control center is detachably installed on the fixing base through the control center connecting mechanism, the control center is electrically connected with the oil pump so as to control the oil conveying flow and pressure of the oil pump, and a double-rotating-rod heating and stirring mechanism is arranged in the oil tank body. The driving assembly drives the outer rotating rod and the inner rotating rod to rotate reversely, and the heating assembly synchronously rotates along with the rotating rods and heats oil. Therefore, uniform heating and full stirring of the insulating oil liquid in a low-temperature environment can be realized, the viscosity of the oil liquid is effectively reduced, and the oil filling quality and efficiency are improved.