2results about How to "Small environment" patented technology

The application relates to a preparation method of an ultra-high-temperature fluid loss additive for well cementing, and belongs to the technical field of oilfield chemicals. After surface modification of palygorskite by a silane coupling agent, the surface polymerization sites of the palygorskite are obtained, so as to participate in a polymerization reaction. N,N-dimethyl acrylamide and other non-ionic water-soluble monomers, 2-acrylamide-2-methylpropanesulfonic acid, itaconic acid, sodium styrene sulfonate and other anionic water-soluble monomers, and vinyl pyrrolidone, sodium p-styrene sulfonate and other rigid monomers are used as polymerization raw materials to synthesize polymer grafted palygorskite. The fluid loss additive has excellent temperature resistance and salt resistance, has excellent fluid loss performance in a high-temperature and ultra-high-temperature environment, the fluid loss amount is less than 50 mL at 240 DEG C, has no obvious influence on other basic performances of cement slurry, can effectively improve the suspension stability of the cement slurry at high temperature, and is suitable for being used as a fluid loss additive for cement slurry under harsh conditions.

The application relates to a road surface monitoring and early warning system, and belongs to the technical field of road surface monitoring, wherein the system comprises: a matrix optical fiber sensing network buried in a road surface; a central reservation digital controller used for transmitting a first optical signal to the matrix optical fiber sensing network and demodulating a second optical signal transmitted back by the matrix optical fiber sensing network; a matrix neural network algorithm module used for identifying the demodulated second optical signal through a preset neural network model to obtain road surface disease information; and a plurality of terminal devices used for linkage display of the road surface disease information; wherein the plurality of terminal devices comprise a digital management and control platform, a driver intelligent terminal, a roadside loudspeaker, a digital central reservation anti-dazzle plate and a roadside variable information signboard. The application can monitor the road surface all day round, and can provide more timely and accurate technical support for road maintenance and driving safety by integrating the plurality of terminal devices.