2 results about "Rapid rise" patented technology

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 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.