2279 results about "Experimental Devices" patented technology

The invention relates to a well cementation cement sheath performance simulation experiment device and an experiment method. The experiment device comprises one set of cement cake circulation device, one set of cement sheath performance detection device and one set of cementing face shearing force experiment device. The experiment method comprises the following steps of: simulating the manufacture process of a well cementation test sample under the practical underground warm-pressing condition; detecting the sealing performance and the corrosion resistance of the cement ring; detecting the sealing performance and the corrosion performance of the cement ring; and detecting cementing face shearing force between a casing pipe test sample and the cement sheath and cementing face shearing force between the cement sheath and a stratum test sample. According to the invention, because the adopted casing pipe test sample has the same size and the material with the casing pipe material applied in the practical well cementation, the adopted stratum test sample is a standard artificial stratum test sample, the porosity-permeability characteristic, the strength characteristic, and the fluid characteristic and the like of the adopted stratum test sample are same with the stratum characteristic in the practical well, the invention can be used for truly simulating the dynamic variation of full-size well cementation, and the simulation condition is accurate. The invention can be widely applied in simulation experiments of various well-cementation dynamic variations.

The invention discloses a device for testing explosion, spreading and explosion suppression characteristics of inflammable gas and dust, which comprises an explosion test pipeline, a gas distribution system and a powder spraying system communicated with the explosion test pipeline respectively, an ignition system for igniting the inflammable gas or dust introduced into the explosion test pipeline, a data test acquisition system, and a host computer connected with the data test acquisition system, wherein the data test acquisition system comprises a sensor group distributed on the explosion test pipeline, a signal conditioner and a dynamic data acquisition analysis system. The device has the advantages of reasonable design, simple and convenient operation and use, more test functions and good test effects, and can effectively solve various practical problems of the prior experimental devices.

The invention provides a quantitive type experimental device for dynamic and static performances of a static-pressure rotary table, and belongs to the field of machinery design and manufacture. According to the experimental device, a loading device (5) and a loading arm (6) are used for changing magnitude of loads or changing oil supply pressure to control the distance between a static-pressure oil cushion (10) and a rotary table disc chuck (7), a pressure sensor (12) is used for measuring pressure in an oil cavity, an eddy current displacement sensor (11) is used for measuring the thickness of an oil film, a thermocouple temperature sensor (3) is used for measuring oil temperature, a force sensor (4) is used for obtaining magnitude of loading force, a pressure gauge a (15) on a multi-head pump at an oil inlet in the oil cavity is used for measuring pressure of the oil inlet of the oil cavity, and a pressure gauge b (16) arranged between an oil pump and the multi-head pump is used for measuring the oil supply pressure of the static-pressure rotary table. By means of the experimental device, a test of the dynamic and static performances of the static-pressure rotary table is carried out under the condition that temperature is between minus 10 DEG C and 60 DEG C and pressure is not more than 100 MPa, and the experimental device provides guarantee for solving problems in engineering, optimizing structural parameters of the rotary table, and improving machining precision of the rotary table.

The invention discloses a component combined torsion experimental device comprising two counter-force frames which are fixed on a foundation terrace, a counter-force beam with two ends which are fixed at the upper ends of the counter-force frames and a counter-force wall fixed at the left side of the counter-force beam, wherein a component is fixed on the foundation terrace. The component combined torsion experimental device is characterized by further comprising a vertical force loading system for applying a vertical force to the component, a horizontal force loading system for applying a horizontal force to the component, a component top linear displacement guide system for meeting requirements of axial deformation, bending deformation and shearing deformation of the component, and a foundation displacement limiting system for fixing the position of the component. According to the experimental device and the method disclosed by the invention, the disadvantages of the existing similar experimental devices and methods are overcome; an experimental principle is scientific and an experimental process is simple to operate and control; the experimental device is convenient to assemble and can be used while being installed; and the experimental device can be circularly used and an experimental result meets a combined torsion performance of the structural component under the horizontal earthquake action, so as to provide experimental guarantees for disclosing a combined torsion mechanism and an anti-seismic property of the structural component.

The invention provides a physical simulation experimental device for oil and gas charging of a fracture-cave carbonate reservoir. The physical simulation experiment device comprises a fracture-cave model, an experiment table with a window, surrounding rock and a camera shooting and monitoring system, wherein the fracture-cave model comprises simulation caves in different sizes and simulation fractures in different sizes, and the simulation caves are communicated through the simulation fractures; the fracture-cave model is arranged in the experiment table with the window, and the simulation caves in at least one side of the fracture-cave model are visible through the window of the experiment table; the surrounding rock surrounds the fracture-cave model to form the fracture-cave carbonate reservoir in a simulating manner; and the camera shooting and monitoring system is used for detecting and adjusting changes of both the flow rate and pressure in the charging process and recording images, displayed in the window, of the fractures and the caves in the charging process. The invention further provides a physical simulation method for oil and gas charging of the fracture-cave carbonate reservoir, and the physical simulation method employs the experimental device. According to the physical simulation method and the physical simulation experimental device for oil and gas charging of the fracture-cave carbonate reservoir, an oil-gas-water distribution rule can be obtained according to such parameters as karst, fractures, crude oil density and oil-gas-water distribution.

The invention relates to a hydraulic fracturing simulation experimental device and method of a hot dry rock enhanced type geothermal system. A hot dry rock high-pressure and high-temperature generating environment is simulated, precise stress is applied to a rock core by designing a multistage piston, the permeability of hot dry rock fluid is maintained by adopting a pressureproof and temperature-resistant perforated plate, the hot dry rock fluid is externally connected to a fluid collection chamber through a flow guiding groove, and meanwhile an adjustable sound emission probe is embedded into a true-triaxial high-pressure axe to monitor a sound emission event happening when a fracture expands in the hydraulic fracturing process, integrated collection of information of rock hydraulic fracturing, sound emission, heat energy recovery efficiency and the like under the triaxial confining pressure condition can be achieved by utilizing the device, and therefore the fracture initiation andexpanding situations of the hot dry rock hydraulic fracture can be studied. The hydraulic fracturing simulation experimental device and method have the beneficial effects that warming and heat preservation effects are good, a sealed part is simple to replace and convenient to maintain, a sound emission embedded part can be adjusted according to the requirements for the probe sizes, in addition, the whole device further has the characteristics that operation is convenient, and the protection and maintenance period is short, and the device is an important technological innovation at the aspect of dry hot rock enhanced type geothermal system hydraulic fracturing testing device detection.

The invention discloses a hydraulic power pulse oil displacement experimental facility and an experimental method thereof. The experimental facility comprises a core clamping device, an annular pressure supply device, a hydraulic power pulse wave generating device, a water storage tank and an oil storage tank which are connected with the liquid inlet of the core clamping device by virtue of a water pipeline and an oil pipeline as well as a liquid container which is connected with the liquid outlet of the core clamping device; wherein the water pipeline and the oil pipeline are all provided with an intermediate container, a pumping device used for generating high pressure liquid flow and an energy storage tank. The experimental method includes the following steps: firstly, oil displacementexperiment is carried out under the condition that no hydraulic power pulse is added; secondly, oil displacement experiment is carried out while frequency and amplitude hydraulic power pulse wave of core are replaced, and meanwhile hydraulic power pulse auxiliary chemical oil displacement experiment is completed; thirdly, data processing is carried out. The invention has reasonable design, mounting convenience, simple operation and good simulation effect, can improve efficiency of oil displacement by water and crude oil recovery ratio, and experiment of hydraulic pulse wave oil displacement and hydraulic pulse wave auxiliary reservoir core oil displacement by water can be realized.

The invention provides a high-precision three-dimensional shape measurement method for a jump object. The method is characterized in that the fringe projection profilometry, in combination with curvelet transform, is applied to three-dimensional shape measurement of the jump object. The fringe profilometry based on structured light projection is a high-precision, quick, noncoherent optical full-field object three-dimensional shape measurement technique, and experimental devices adopted are simple, which mainly include a computer, a projector and a digital camera. The projector is used for projecting a plurality of sets of sine fringe patterns different in frequency to the jump object to be tested; the digital camera is used for recording deformed fringe patterns and transmitting the deformed fringe patterns to the computer, and then the deformed fringe patterns are denoised by virtue of curvelet transform and the phase distribution of the deformed fringes is demodulated in combination with a phase shifting method, and unwrapped phase distribution is obtained by using a phase unwrapping method. At last, three-dimensional data of the jump object is obtained according to a phase-height relation. The high-precision three-dimensional shape measurement method has the major gain that a high-precision fast full-field measurement technique for the three-dimensional shape measurement of the jump object.

The invention discloses a micro-fluidic chip for generating micro-droplets the sizes of which are uniform, and belongs to the technical field of experimental devices and methods. The elastic bottom surface T-shaped micro-fluidic chip mainly comprises a dispersed phase inlet, a side channel, a continuous phase inlet, a main channel, an outlet, a main solid structure, a film bottom surface structure, a base and a glass slide. Two incompatible liquids for generating the micro-droplets can flow in from the dispersed phase inlet and the continuous phase inlet and are joined on a joint of the side channel and the main channel, a dispersed phase breaks to form the droplets which can flow to the downstream along with a continuous phase and finally flow out of the chip through the outlet; the film bottom surface structure deforms and vibrates under the liquid action, a droplet generation process is influenced, and the micro-droplets with good uniformity are obtained. The micro-fluidic chip provided by the invention can utilize a simple T-shaped micro-channel structure to generate micro-scale droplets with good uniformity, which cannot be generated by a general T-shaped micro-fluidic chip, without an extra driving or control device, the micro-fluidic chip is intuitive and distinct, and the operation is simple.

The invention discloses a combined quick-changing type transmission mechanism teaching aid, and belongs to the field of education teaching instruments or demonstration tools. The teaching aid comprises a motive power platform and a transmission mechanism, wherein the motive power platform comprises a vertically arranged fixed panel; a motor, a worm and gear component, a bevel gear component, a chain wheel and an output shaft are arranged on the fixed panel; the worm and gear component is positioned right above the motor and is connected with a motor belt; the worm and gear component is in shaft connection with the bevel gear component; the chain wheel and the bevel gear component are arranged relative to the fixed panel and are in shaft connection with each other through the bevel gear; the chain wheel is connected with the output shaft through a chain; and the output shaft is connected with the transmission mechanism. Tape transmission, worm and gear transmission, bevel gear wheel transmission and chain transmission are performed on the motive power platform. Through the adoption of the various combinations, the teaching aid has the advantages that various experimental demonstrations such as gear train, crank connecting rod and sliding block and gear show processing can be realized; the experimental devices can be demounted and mounted quickly; and the mechanical transmission experiment teaching is facilitated.

The invention provides a two-dimensional microcosmic visual thickened oil replacement simulation experiment system and a use method thereof. The two-dimensional microcosmic visual thickened oil replacement simulation experiment system comprises a microcosmic simulation experiment device, a visual data acquisition device, a support device, a multivariate thermal fluid injection device, a confining pressure tracking device and a metering device, wherein the microcosmic simulation experiment device comprises a heating jacket, a clamper and a plate glass microcosmic model; the visual data acquisition device comprises a microscopic shooting device and a computer; the multivariate thermal fluid injection device comprises an ISCO injection pump, an oven and a replacement medium intermediate container, a water intermediate container, a thickened oil intermediate container, a first heat traced pipeline and a bypass pipeline; the confining pressure tracking device comprises an annular pressure tracking pump, an annular pressure tracking pump pressure meter, a vacuum pump and a first vacuum valve. The two-dimensional microcosmic visual thickened oil replacement simulation experiment system give full consideration to characteristics of the thickened oil reservoirs, provides convenience for research on a thickened oil replacement mechanism through microcosmic experiments, has the advantages of low experiment cost, high work efficiency and the like, and can meet with demands on development and research of the thickened oil reservoirs.

The invention discloses a chemical conversion mediation based escherichia coli gene knockout method by a CRISPR / Cas9 system. A chemical conversion method is adopted to guide foreign DNA into a host cell, and escherichia coli gene knockout is realized successfully by a gamma-Red homologous recombination system and the CRISPR / Cas9 system which are pre-guided into the host cell. Compared with existing escherichia coli gene knockout methods, the chemical conversion mediation based escherichia coli gene knockout method has the advantage that efficient and accurate target gene knockout can be realized in escherichia coli. The intra-bacteria gene knockout method is simple, convenient and rapid to operate, has no special requirements on experimental devices, has low experimental cost, and is particularly applicable to knockout of high-throughput genes.

The invention relates to a comprehensive simulation experimental device of a drilling circulation system. The comprehensive simulation experimental device of the drilling circulation system comprises a drilling liquid circulation loop, a rock debris circulation branch, an air injection branch and a data collection system. The drilling liquid circulation loop is formed by an annulus testing section, a Parshall flume, a vibration screen, a liquid storage pool and a frequency changing pump. The rock debris circulation branch is formed by sequentially connecting an air propeller, a rock debris collection tank, a packing tank and a screw pump through pipelines, wherein the air propeller is arranged on the vibration screen, and the screw pump is connected to the position of an inlet of the annulus testing section through a pipeline. The air injection branch is formed by connecting an air storage tank and an air compressor through a pipeline, wherein the compressor is connected with a tee joint through a pipeline. By means of the comprehensive simulation experimental device of the drilling circulation system, the migration rule of annulus rock debris under different hole drift angles can be observed, and radial concentration of the annulus rock debris under different hole drift angles and grain composition of the annulus rock debris in different river basins can be quantitatively measured.

The invention provides a diversion acidizing experimental apparatus suitable for multiple permeability max-min ratios and an evaluation method. The experimental apparatus comprises an injection system, a rock core clamping device, a simulation system, a metering system, and a data acquiring and processing system, wherein the injection system comprises a plurality of working solution storage devices which are arranged in parallel and an injection pipeline; an injection pump and a valve are arranged on the injection pipeline; the rock core clamping device comprises a plurality of rock core clampers which are arranged in a thermostat in parallel; the simulation system comprises a working solution flow control device, a temperature control device and an environment pressure control device; the metering system comprises a pressure sensor, a temperature sensor and an electronic scale; the data acquiring and processing system comprises a man-machine interaction device, a data processor and an execution unit. The diversion acidizing experimental apparatus can meet synchronous experiment demand of multiple rock cores, is particularly suitable for a long well-section diversion acidizing experiment or a temporary blocking steering acidizing experiment with strong anisotropism and large permeability max-min ratio, has the advantages of strong comparison of experimental conditions and results and high experimental efficiency on fracturing liquid optimization and reservoir sensitivity evaluation, and has wide application prospect.

The invention relates to a liquefied natural gas (LNG) drain diffusion and pool fire combustion simulated experimental platform and an LNG drain diffusion and pool fire combustion simulated experimental method. The platform comprises an experimental system, a testing system and a control system, wherein the experimental system consists of an LNG storage tank, heat-insulation pipes, experimental devices and an anti-explosion isolating wall; the testing system consists of an electronic balance, an ignition system, a methane concentration detector, a thermocouple tree, a data acquirer and a camera; and the control system consists of a programmable logic controller (PLC) system, various display instruments and a control valve. By designing an angle-adjustable LNG surface spreading experimental device with a changeable surface material, spreading and gasification diffusion experimental simulation of LNG on surfaces of different substances and at different flowing speeds can be carried out; and by matching the ignition system and the methane concentration detector, LNG gas cloud concentration change monitoring and gas cloud ignition can be realized, and data and images are acquired automatically. The platform has the advantages of short experimental time, low cost, high experimental efficiency and the like. By the design, experimental steps are less, experimental safety is guaranteed under the condition of severe monitoring and control, the platform is easy and convenient to operate, and experimental repeatability is high.

The invention discloses a method for testing brittle material dynamic-shear fracture toughness and an implementation device thereof. The method comprises the following steps of installing a cylindrical sample with annular precracks on a Hopkins pressure lever dynamic experiment device, applying a dynamic shear force for two ends of the cylindrical sample with the annular precracks arranged between an incident bar and a transmission bar by impacting the incident bar by an impact pellet, and calculating dynamic-shear fracture toughness KIIC of the brittle material and a corresponding loading rate by a strain value, incident bar and transmission bar cross sectional areas, pressure lever elasticity modulus and sample confining pressure value according to a formula provided by the invention. The method can acquire dynamic-shear fracture toughness of a quasi-brittle material and fills in gap of the research field.

The invention relates to a transformer oil / paper insulation aging experimental device and method. The experimental device comprises a high voltage electrode, a low voltage electrode, a seal cavity and a screening shell, the high voltage electrode and the low voltage electrode are disposed in the seal cavity, an insulation paper sample is arranged between the high voltage electrode and the low voltage electrode, the seal cavity comprises an upper seal cavity and a lower seal cavity, miniature oil injection holes and miniature oil pumping holes are formed in the upper seal cavity and the lower seal cavity, an O-shaped seal ring is arranged at the connecting position of the upper seal cavity and the lower seal cavity, the high voltage electrode is located in the upper seal cavity and provided with a first screw rod, and the low voltage electrode is located in the lower seal cavity and provided with a second screw rod. By means of the transformer oil / paper insulation aging experimental device and method, an oil / paper insulation structure required by an experiment can be adjusted according to experiment requirements, an oil sample can be directly extracted without movement of oil / paper insulation after aging is finished, and problems that oil / paper insulation aging experimental devices are complicated in structures and inconvenient to operate in the prior art can be solved.

The invention belongs to the technical field of experimental devices for scientific researches on in-situ leaching uranium mining, and particularly relates to a leaching experimental facility for in-situ leaching uranium mining. A gas source comprises an oxygen source and a carbon dioxide source; gas and liquid are mixed and dissolved by using a magnetic stirring device in a stirring container; dissolving pressure is controlled by a nitrogen cylinder via a stirring container pressure return valve; the pressure provided by a plunger pump is adjusted through an intermediate container pressure return valve in an experiment until the pressure in a liquid injection intermediate container is the same with the pressure in the stirring container; leaching liquid is pressed in the liquid injection intermediate container by a pressure adjusting portion; a rock core is arranged in a full-diameter rock core holding unit; a ring pressure pump and a pressure sensor are arranged at two ends of the holding unit; an outlet end is provided with a leaching pressure return valve; formation pressure is simulated; oxygen in leaching agent is controlled so that the oxygen cannot be separated out; the mass of the liquid is measured by a balance measuring system; and the experiment is automatically controlled by a computer.

The invention discloses a three-dimensional multiwall combined exploration experimental apparatus for a natural gas hydrate and an experimental method thereof. The device comprises a three-dimensional high pressure reactor, an inlet control unit, an outlet control unit, and a data processing unit; the three-dimensional high pressure reactor is provided with a plurality of wells which are extended into a stimulation cavity and comprises a central vertical well and a plurality of vertical side wells; the stimulation cavity is divided into n horizontal layers along the vertical direction; and all vertical well pipes are extended into the horizontal layers with different depths in the simulation cavity respectively. The hydrate can be exploited by simulating a plurality of wells in a combined way; various exploration mechanisms, and exploration trends can be comprehensively researched, and various exploration methods are optimized and comprehensively evaluated; and the experimental apparatus realizes the simulation of hydrate multiwall exploration through experiments, so that the three-dimensional simulation experiment is expanded and experimental basis and reference are provided for the large-scale natural gas hydrate exploration.

The invention discloses an automatic detection method and an automatic detection device for a connection wire of an electrical experimental facility. The automatic detection device for the connection wire of the electrical experimental facility comprises a (Micro Processing Unit) MCU, an 8155 chip, 24 relays, 24 free-wheeling diodes, 24 triodes, 48 connection terminals, 24 current-limiting resistors, 24 pull-up resistors, a communication module, an alarming module and a keyboard module. The automatic detection device for the connection wire of the electrical experimental facility adopts the triodes to drive the relays, so that the circuit is simple in structure, the elements are less, the cost is low, the connection status among the terminals of the experimental facility can be automatically detected, the elements are protected effectively, and the reliability is high; the intelligent detection device is adopted, so that the workload of experiment advisors can be effectively reduced; once the detection device emits alarm information, students can find problems by themselves, so that the problem-solving ability of the students is effectively improved, and the quality of teaching is ensured. The automatic detection method and the automatic detection device for the connection wire of the electrical experimental facility are applicable to all electrical experimental facilities for teaching.

An experimental device for simulating deflection fracturing of a fracture comprises a pump, an intermediate vessel portion and a fracturing experimental device connected through a pipeline system; and a simulated wellbore and perforations are arranged in the fracturing experimental device, and fracturing fluid or a temporary plugging agent is injected into the fracturing experimental device by the pump through the intermediate vessel portion and the perforations of the simulated wellbore. Researches on inner fracture deflection experiments and setting laws of the temporary plugging agent are few, and a necessary indoor experimental device is not available. Based on the relative theory, through combination with actual conditions of on-site construction and underground reservoirs, and on the basis of the similarity criterion, a deflection fracturing experimental device of the fracture is designed and produced, and the experimental device can conduct the experimental researches on the performance evaluation of the temporary plugging agents with different types, the setting laws of the temporary plugging agents, the fracture steering rules and the like. The experimental device can conduct the experimental researches on the influences on inner fracture deflection of the temporary plugging agents with different types and the setting modes of the temporary plugging agents and the research results have a certain reference to the on-site construction.

The invention belongs to the technical field of unconventional oil and gas exploitation, and particularly relates to an experimental apparatus for exploiting natural gas hydrate reservoir by means of thermal fluid fracturing. The experimental apparatus for exploiting the natural gas hydrate reservoir by means of thermal fluid fracturing comprises a hydrate core three-axis fracturing system, a fracturing fluid injection system, a natural gas exploitation system and an acoustic emission monitoring system, and is characterized in that the hydrate core three-axis fracturing system is used for fracturing a hydrate core to form hydraulic fracture; the fracturing fluid injection system provides high-pressure thermal fracturing fluid in a hydrate fracturing procedure; the natural gas exploitation system is used for exploiting the natural gas hydrate core in a depressurization manner; and the acoustic emission monitoring system is used for detecting an expansion procedure of the fracture and flowing states of multiple phases of fluid in the fracture. The experimental apparatus has the advantages that a ground stress state of the actual natural gas hydrate reservoir can be truly simulated, and mechanism study and effectiveness evaluation for exploitation for the natural gas hydrate reservoir by means of thermal fluid fracturing can be implemented.

The invention discloses an experimental device and an experimental method of impact drawing-twisting load, belonging to the field of impact dynamics experiments. The experimental device comprises a drop hammer, a test piece, an impact force transfer device, a loading disc, a measuring device and a test piece fixing device; the drop hammer drops down to impact a transmission target, the transmission target moves on a track after being impacted, a base is provided with a prestress loading device, the prestress is applied to an impact target through an adjusting threaded rod, two sides of the impact target are respectively connected to the loading disc through steel wire ropes, each steel wire rope is provided with a force sensor, the disc transfers the drawing force and twisting force to a reinforcing steel bar of the test piece, and a metal strain gauge is attached inside the reinforcing steel bar of the test piece and used for measuring the stress distribution along the anchoring length of the reinforcing steel bar. According to the experimental device and the experimental method, the bond stress distribution of a reinforcing steel bar concrete anchoring reinforcing steel bar under the drawing and twisting load effects of the impact is researched, and a powerful foundation is set for researching a constitutive relation of anchoring bond slip under the effect of complicated stress.

The invention discloses a novel true triaxial fracturing seepage test device and method, and belongs to the field of rock mechanics and oil-gas reservoir exploitation. The device is characterized by mainly comprising a model system (1), a hydraulic fracturing system (2), a triaxial stress loading and control system (3), a pressure measurement system (4), a temperature control system (5), a seepage-pressurization system (6), a pipe valve system (7), a data acquisition and processing system (8), an acoustic emission system (9), an operation table (10), a composite phase state fluid monitoring system (11) and the like. The experimental device can simulate the true triaxial fracturing process of fracturing the porous rock with the pore pressure by different fracturing media under the in-situ condition, consider the interaction influence of formation fluid and the fracturing media, simulate the fracturing process of the reservoir with the natural gas, and solve the problem that existing equipment can only fracture the porous rock with the zero pore pressure. In addition, the fracturing seepage equipment achieves anisotropic permeability measurement by metering the flow in different directions and combining the upstream and downstream pressure difference, and then the permeability values before and after fracturing are compared to determine the anisotropic fracturing effects of different fracturing media.

The invention discloses an experimental device for simulating a hydrofracture action mechanism in the steam assisted gravity drainage (SAGD) process. The experimental device comprises a true triaxial stress loading device, a steam heating device, a fracture device and an acoustic emission monitoring device. The true triaxial stress loading device can apply stress in three directions to an experimental rock sample through a pressure chamber. The steam heating device locally heats the experimental rock sample through a hot steam circulation pipeline prefabricated in the experimental rock sample and monitors the temperature of the experimental rock sample through a temperature sensor arranged on the surface of the experimental rock sample. The fracture device injects fracturing fluid into the experimental rock sample through a shaft prefabricated in the experimental rock sample. The acoustic emission monitoring device monitors acoustic emission signals generated inside the experimental rock sample and determines the crack spatial position through a corresponding positioning algorithm. By the adoption of the experimental device, the SAGD hydrofracture process under a high-temperature and high-pressure condition is simulated, and thus true and effective evaluation and reference are provided for hydrofracture construction design of a thickened-oil oilfield.

The invention discloses a visualization experiment device and method for profile control performance evaluation of weak gel of a fractured reservoir. The experiment device comprises a visualization crack module, a water transport intermediate container, a gel transport intermediate container, a displacement pump, a liquid container connected with a liquid inlet of the displacement pump, a measuring cylinder connected with a liquid outlet of the crack module and a vacuum pump for vacuumizing the crack model. The experiment method comprises the following steps: 1, carrying out a dynamic displacement experiment on weak gel in a crack; 2, replacing crack models with different crack widths, and carrying out injection performance and plugging performance evaluation experiments on the weak gel in a plurality of cracks under the conditions of different weak gel viscosities and injection speeds; 3, carrying out data processing. The visualization experiment and device are reasonable in design, favorable in visuality and good in simulation effect, provides convenience for observing the displacement and plugging processes of the weak gel and can be used for testing and recording the injection performance, the plugging performance and the plugging state of the weak gel in the cracks under the conditions of different weak gel properties and different crack widths.

The invention provides an experimental device and method for mechanisms. The device is matched with a corresponding locking device by utilizing one-way drive characteristics of flywheels, and clockwise and anticlockwise rotation of different parts on the same shaft is realized; different parts, such as a center wheel, a planet carrier and a cam, are replaced and mounted on a large turntable, so that three experimental devices can be formed. According to the experimental method, the large turntable serves as a reference system, a relative movement state and a relative still state of components are formed by configuring different parts such as the center wheel, the planet carrier and the cam, rotating the components in the reference system and reversely rotating the reference system, and three reversal-process experiments such as epicyclic gear train transmission ratio reversal-process calculation, cam outline reversal-process design and connecting rod mechanism tempering reversal-process can be realized. The experimental device for realizing the reversal process is invented at first in the mechanism theory, and drawing and abstract analysis can be intuitively realized through the experimental device and method.

The invention relates to the technical field of experimental devices, and discloses a gas-containing coal hydrofracture-induced dynamic damage simulation monitoring device and method. The device comprises a sealed cavity for containing a cubic coal sample, an acoustic emission monitoring unit, a confining pressure unit, a hydrofracture unit and a gas injection unit, wherein the confining pressure unit extends into the sealed cavity to apply confining pressure onto the cubic coal sample; the gas injection unit extends into the sealed cavity to inject gas into the cubic coal sample; the hydrofracture unit extends into the sealed cavity to perform hydrofracture on the cubic coal sample; and the acoustic emission monitoring unit extends into the sealed cavity to acquire an acoustic emission signal from the cubic coal sample. The device can be used for monitoring and analyzing gas-containing coal hydrofracture-induced dynamic damage with different gas pressure and different coal intensities under different pressure conditions. The device is simple in structure, simple in monitoring method and easy to operate.

The invention discloses an ultrasonic vibration rock crushing experimental device and experimental method. The experimental device is composed of a drilling mechanism, an ultrasonic vibration mechanism and a drilling parameter control system. A clamping device is installed on a drilling machine base, a rock is fixed on the clamping device, and two cylinders are fixed on the two sides of a drilling machine rack. A motor, a driving wheel and a driven wheel are fixed on the drilling machine rack, the lower end of a drilling machine column is fixedly connected with the drilling machine base, and the upper end of the drilling machine column is fixedly connected with the drilling machine rack. A vibration transmission rod and a faucet are connected to the upper end of a driven rod, and a drill pipe and a drill bit are connected to the lower end of the driven rod. An ultrasonic transducer and the drilling mechanism are connected together through a connecting rod mechanism. A control cabinet composed of a flow regulator, a frequency converter, a driving power supply, a pressure regulating valve and an ultrasonic generator is connected with a water pump, the motor, the cylinders and the ultrasonic transducer. By means of the ultrasonic vibration rock crushing experimental device and experimental method, the whole process of crushing the rock during comprehensive drilling and core drilling under different drilling parameters can be simulated, and rock grindability tests and evaluation of the performance and quality of a micro drill bit can also be achieved.

The invention discloses an adjustable charge-discharge type high temperature and high pressure helium gas experimental system and an adjustable charge-discharge type high temperature and high pressure helium gas experimental method. The method comprises: supplying gas by a high pressure helium gas tank set, reducing the pressure of the helium gas to desired pressure through a pressure reducing valve, performing the closed-loop control on the pressure reducing valve by using a pressure transmitter, heating the helium gas by an electric heater, performing the closed-loop control on heating power of the electric heater by using a temperature transmitter, adjusting opening degree of a control valve according to a set flow value and a difference value measured by a flow gauge so as to obtain the helium gas with a rated pressure, temperature and flow quantity, and introducing the helium gas to a thermal hydraulic power experiment section to perform experiment. The high-temperature helium gas enters a gas storage tank for collection after a cooler exchanges heat, the helium gas recycled in the gas storage tank is pressed into the high pressure helium tank set through a helium gas compressor to carry out experiment repeatedly. According to the system provided by the present invention, a high temperature and high pressure section is only in an experimental section, so that high temperature and high pressure sealing performance requirements of other experimental devices in a loop are reduced, pressure, temperature and flow quantity of the experiment helium gas are adjusted, and requirements on a working condition for high temperature and high pressure helium gas thermal hydraulic power experiment can be met.