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852results about How to "Optimized formula" patented technology

Water-control fracturing yield increasing method for oil gas well

ActiveCN101476452AVoid cloggingOptimized formulaSealing/packingWaxCross-link
The invention relates to a method for increasing the yield of an oil gas well by controlling water pressing crack, in particular to water control pressing crack technology which takes a jelly glue system capable of automatically reducing the viscosity when encountering bottom water as a pressing crack liquid and wax-coated sand as partial supporting agent. At present, when hydraulic pressing construction is performed on low permeating bottom water oil pool, because the stress difference between layers is small or no interlayer forms the stress difference between the layers, the extending of cracks in the vertical direction can be effectively prevented, cracks formed by the hydraulic pressing crack extend and enter a water layer on the bottom in the vertical direction and jump to flow into a shaft along the cracks, and violent flooding of an oil well is generated. When pressing crack construction is carried out, the method adopts a coated supporting agent formed by mixing a thickening agent and a cross-linking agent carrying wax and quartz sand to undergo chemical degradation to coat and block so as to form a blocking layer. The method effectively solves the problems that the prior manual shielding layer cannot effectively prevent the oil well from being flooded by water, and a pressing crack liquid carrying a diversion agent or a temporary plugging agent cannot reduce viscosity basically when encountering the water and has slower settling.
Owner:QINGYANG CHANGQING DOWN HOLE OILFIELD AUXILIARIESCO

Closed nucleic acid chromatographic test paper detection kit preserved at normal temperature and detection method

The invention discloses a method for preserving nucleic acid amplification reagents at normal temperature. Partial nucleic acid amplification reagents or all reagents are converted to solid state through a solidifying process and preserved stably at normal temperature. The invention further discloses a closed nucleic acid chromatographic test paper detection kit preserved at normal temperature. The kit comprises a nucleic acid extraction reagent of a sampler, the nucleic acid amplification reagent preserved at normal temperature, a closed chromatographic test paper detection device and an innocent treatment method of nucleic acid amplification products. The closed chromatographic test paper detection device comprises immunochromatographic test paper and a closed detection device, wherein the immunochromatographic test paper is fixedly arranged in the closed detection device, and sample liquor detected cannot be contacted with external environment. In addition, the invention further discloses a method for nucleic acid detection by using the kit. According to the invention, the nucleic acid reagents can be conveyed and preserved at normal temperature and extracted simply and quickly, and the nucleic acid amplification products are hermetically, quickly and sensitively detected, so that cross infection is avoided.
Owner:QUICKING BIOTECH
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