31results about How to "Restore production" patented technology

The invention relates to a coal-seam gas dual-channel well-washing valve, and is applied to the technical field of coal-seam gas exploitation. Two external threads of different nominal diameters are arranged at the upper end of an adapter; an internal conical surface is arranged at the upper end of the center hole of the adapter, and a steel ball is arranged on the conical surface; a core barrel is connected with the upper end of the adapter; a lateral liquid inflow hole is formed on the wall of the core barrel; a liquid discharge pipe is connected with the upper end of the core barrel; an outer barrel is connected with the upper end of the adapter; circular space is formed between the inner wall of the outer barrel and the outer wall of the core barrel; a pipe joint is connected with the upper end of the outer barrel; and circular space is formed between the pipe joint and the liquid discharge pipe. The coal-seam gas dual-channel well-washing valve has the effects that a hydraulic pump truck is connected with a sleeve gate of a gas exploitation well mouth, so as to pump clean water into a well casing; well-washing water can achieve the underground blocked pump barrel and oil pipe through conversion of the water flow channels of the coal-seam gas dual-channel well-washing valve, so as to wash the underground coal dust to the ground; the well-washing water does not enter the coal seam, so as not to damage the coal seam; and production can be directly restored, and the coal-seam gas yield is rapidly restored to the yield before the pump barrel blockage caused by coal dust.

The invention discloses a kiwifruit inarching method to control current leaf defoliation diseases of kiwifruit. Control is achieved by subjecting actinidia kolomikta and actinidia polygama to inarching and stock interchanging. After experimental researches succeed, a unique technical system of controlling leaf defoliation diseases of red kiwifruit is explored in Cangxi. The technical system is used with a series of techniques of agricultural measures to form technical norms, so that technical support is provided for planting high-quality kiwifruit in low altitude and high humidity areas, and planting advantages of kiwifruit are expanded.

The invention discloses a method for selective water plugging of high water-cut gas wells in bottom water gas reservoirs. The foaming agent solution is an aqueous solution of an ionic foaming agent, and the concentration is controlled at 0.5%-1.2%; S3, after the completion of step S2, inject nitrogen, so that the nitrogen enters the water-producing high pressure layer, forcing the water cone in the near-wellbore zone to fall back; S4, injecting The blocking agent enters the water-producing channel directionally, and forms an artificial baffle in the water-producing layer to block the channel of bottom water channeling, inhibit and alleviate the coning of bottom water; The method is to establish an artificial baffle at the water production layer of the gas well with high water cut in the bottom water gas reservoir, which can realize intelligent selective water plugging of the gas well with high water cut in the bottom water gas reservoir, and solve the problem that the gas well production decreases sharply after the gas reservoir breaks through.

The invention discloses a method of modifying Saccharopolyspora erythromycetes SACE_3980 Genetic method for improving erythromycin production, in Saccharopolyspora erythromycetes, deletion of TetR family transcriptional regulatory genes through genetic engineering SACE_3980 , to obtain high-yield erythromycin engineering strains, and use the obtained strains to ferment and produce erythromycin, which can greatly increase the yield, and provide new technical support for industrial production to increase erythromycin yield.