Uranium well air pumping dredge method

Abstract

The invention relates to a uranium well gas lifting stemming removing method used in a sandstone type uranium deposit regent-free uranium mining production process. The method comprises the steps: a polyethylene pipe is put in a uranium well, and a reverse circulation gas lifting mode is adopted to achieve the purpose of plug removing, wherein, the reverse circulation gas lifting mode is that high-pressure gas is injected in the annular space between a PVC casing and the polyethylene pipe so that the liquid surface in the annular space is lowered gradually, inside and outside differential pressure is formed outside the polyethylene pipe, the liquid in the polyethylene pipe is lifted out of the well mouth under pressure, then negative pressure is formed at the ore bed segment at the well bottom simultaneously so as to cause the fluid in a uranium ore bed to flow faster towards a well casing, and after that, stemming of gas, mechanical impurities and the like in the ore bed flow out to ground along with the high speed fluid by the polyethylene pipe. The method can be applied to the stemming removing operation of uranium deposit ore bed caused by gas and mechanical impurities; and by utilizing the technological method, good stemming removing effect is obtained, the production period of the uranium well is improved greatly and the uranium mining production cost is reduced.

Description

Technical field: [0001] The invention relates to a process for removing plugs in the production process of uranium mining without reagents in sandstone-type uranium deposits. Background technique: [0002] During the production process of uranium mining in uranium deposit without reagent in situ leaching, the blockage caused by gas and mechanical impurities in the ore bed often occurs, which affects the normal production of uranium wells. At present, well flushing is usually used on-site for mine blockage, but this method can only eliminate the blockage in the shaft and near the wellbore, and cannot fundamentally remove the blockage of gas and mechanical impurities. higher cost. Invention content: [0003] The purpose of the present invention is to provide a uranium well gas-lift plugging removal method which has remarkable plugging removal effect, can greatly prolong the mining period of the uranium well, and reduce the production cost of uranium mining. [0004] The te...

AI Technical Summary

Problems solved by technology

At present, well flushing is usually used on-site for mine blockage, but this method can only eliminate the blockage in the shaft and near the wellbore, and cannot fundamentally remove the blockage of gas and mechanical impurities. higher cost

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