7 results about "Rapid rise" patented technology

The utility model particularly relates to a pipeline pup joint structure for reducing the pressure of a shortening production system, which comprises a quenching stirrer, a kneading stirrer and a small kneading stirrer, a port A1, a port A2, a port A3 and a port A4 of the quenching stirrer are sequentially connected through a plurality of pup joint pipes, and a port A4 of the quenching stirrer is connected with a port B1 of the kneading stirrer through a plurality of pup joint pipes. A port B1, a port B2, a port B3 and a port B4 of the quenching stirrer are sequentially connected through a plurality of short connecting pipes, and a port B4 of the kneading stirrer is connected with the small kneading stirrer through a plurality of short connecting pipes; the short connecting pipes are connected end to end, fixedly connected through the connector device and unlocked through the unlocking device. According to the utility model, the length of the pipeline is shortened through the short connecting pipe, and the number of the right-angle elbows and the number of the obtuse-angle elbows are reduced, so that the rapid rise of pressure in the pipeline is slowed down, re-production after shutdown and pressure reduction is avoided, the production efficiency is improved, and the vacancy time of a production system is reduced.

The application relates to a kind of silica-polyurethane composite phase change microcapsules for water-based drilling fluid and a preparation method and application thereof, and belongs to the technical field of oilfield drilling fluid.The application successfully obtains a kind of phase change microcapsule with ternary nitrate / graphene composite phase change material as core material and silica-polyurethane composite material as shell material by sol-gel interface polymerization method.The phase change microcapsule of the application circulates to the bottom of well high-temperature stratum along with drilling fluid, when the temperature of system reaches its phase change temperature, the core material generates phase change endothermic behavior from solid to liquid, avoids the rapid rise of drilling fluid temperature, thereby improving the high-temperature stability of drilling fluid.When drilling fluid circulates into upper low-temperature stratum, microcapsule generates phase change exothermic behavior, realizes multiple cycle temperature control effect.

The invention discloses a numerical simulation characterization method for flooding dominant channels of a thin-layer sandstone reservoir, which belongs to the field of numerical simulation of reservoir engineering, and adopts a non-structure + angular point mixed grid design method for flooding dominant channels of different water-containing stages of the reservoir, and optimizes the sizes, directions and proportions of different types of grids. The method solves the problem that the water content of a production well is rapidly increased due to directional water channeling which is difficult to fit by a common model, can effectively characterize the geometrical characteristics of a water-flooded channel in any form in an oil reservoir, simulates the characteristics of fluid channeling along the water-flooded channel, accurately reflects the phenomenon that the water content of the oil production well is rapidly increased, and has a good application prospect. The simulation water content coincidence rate is improved by 15% compared with that of a common model, and a reliable remaining oil distribution result is obtained.

The invention relates to the technical field of mountain torrent disaster risk analysis, in particular to a mountain torrent evolution and risk assessment method and system based on inducement characteristic changes. The scheme comprises the following steps: determining a key monitoring index according to a preset mountain torrent main inducement library; performing dynamic analysis according to the key monitoring index to form a volatility index, a cliff falling index and a rapid rising index; performing dynamic risk according to the fluctuation index, the cliff falling index and the rapid rising index to form a first influence factor, a second influence factor and a third influence factor; judging whether obvious change exists or not, and if so, setting a jump type influence factor; a pre-estimated natural attenuation disaster risk curve is formed, and the mountain torrent disaster probability change of each point location is automatically updated in combination with the jump influence factors; and performing plane display according to the mountain torrent disaster probability change of each point location. According to the scheme, a curve or a dynamic graph of mountain torrent evolution is formed by paying attention to the change condition of main inducements.

The present application relates to the field of ecological revetment in the field of hydraulic engineering, and particularly relates to a riprapping ecological revetment system suitable for water level drawdown. The system comprises an ecological soil base layer, a filter layer, a riprapping revetment, a simulated wood pile scour protection belt and a planting groove; the ecological soil base layer has a compaction degree of greater than or equal to 93%, providing a dense support; the filter layer ensures smooth seepage and prevents soil loss; the riprapping revetment is formed by stacking large-diameter block stones according to gradation, forming a rigid skeleton resistant to scour; the planting groove is fixed in the riprapping structure, providing space for vegetation and anchoring the surface riprapping. The present application forms a closed-loop protection system through the cooperation of the five, effectively solving the problems of traditional riprapping revetment, such as easy scouring and instability during water level drawdown, and high maintenance cost, and has the advantages of scour resistance, ecology and universality, and is suitable for water level rapid rise and fall scenes such as regulating and storing lakes, reservoir drawdown zones, tidal river shorelines and the like.

The invention relates to the technical field of physical simulation, monitoring and early warning of karst geological disasters, in particular to a quantitative description device capable of being used for researching karst collapse and a use method thereof, and the quantitative description device comprises a main body model, a karst pipeline simulation system, a hydrological process control system and a multi-parameter data monitoring and acquisition system. Through cooperative operation of the systems, the physical process of'differential pressure induced collapse 'induced by rapid rising and falling of the underground water level can be simulated, and quantitative data acquisition and fusion analysis of the whole process of intra-cavity differential pressure, soil internal stress and strain and earth surface deformation are realized by means of an integrated multi-dimensional synchronous monitoring network; the dynamic mechanism and the key threshold value of differential pressure collapse are disclosed, and a reliable experimental platform and a quantitative basis are provided for mechanism research, risk assessment and early warning prevention and control of karst collapse.

The embodiment of the invention provides an inverter heat dissipation mechanism control method and device, equipment, a medium and a product, and relates to the field of photovoltaic power generation, the method accurately characterizes the overall thermal state of an inverter through the coupling temperature formed by multi-region temperature fitting, and meanwhile, the temperature change rate is calculated by combining the coupling temperature of the front and back sampling periods, so that the heat dissipation mechanism of the inverter is obtained. The dynamic change trend of the temperature is captured, the thermal inertia compensation coefficient is calculated according to the temperature change rate, the reference duty ratio is corrected based on the compensation coefficient, the compensation intensity is increased along with the increase of the temperature rise rate during temperature rise so as to cope with the rapidly rising thermal load in advance, and the compensation intensity is reduced along with the increase of the temperature reduction rate during temperature reduction so as to cope with the rapidly rising thermal load in advance. Temperature rebound caused by premature speed reduction due to thermal inertia is avoided, the control logic and the physical thermal response characteristics of fast temperature rise and slow temperature reduction of the inverter are accurately coordinated, the contradiction of misalignment of the control logic and the dynamic thermal load characteristics in the prior art is solved, and the control efficiency of a heat dissipation mechanism of the inverter is improved.