Well completion method of ground dipping uranium extracting process well

Abstract

The invention relates to a well completion method of an in-situ leaching uranium mining technological well used in the well drilling and completion of a reagent-free in-situ leaching uranium mining technological well, comprising the steps: a casing of the uranium mining technological well is made by tubes of PVC materials, the tubes are connected by screw threads and uniformly coated with PVC glue for guaranteeing sealing and preventing from stringing together; and a PVC ring-shaped skeleton sieve tube is adopted, iron rings are arranged at the upper and lower ends of the sieve tube so that the positions of the sieve tube and an ore bed are conveniently measured, errors are easily adjusted and the sieve tube is ensured to be put in place accurately. A cement plug is injected at the bottom of a sand sediment tube so as to prevent a cone at the bottom of the sand sediment tube from being damaged when a metal tube is put in. When the well completion operation of the uranium mining technological well is carried out by the method, a gravel packing segment and a sand sediment segment are arranged at the bottom of the casing, the ring-shaped skeleton sieve tube is put in from the upper end of the casing, and iron rings are arranged at the upper end and the lower end of the casing. A well cementing segment, a gel-cement paste sealing segment and a cement gel sealing segment are arranged between the casing and the wall the well. The well completion method solves the problem that a wetted area can not be guaranteed as a result of the malposition of the sieve tube and the ore bed and the layer crossing of ore bed water. The method can be widely used for well drilling and completion operation of the reagent-free in-situ leaching uranium mining technological well.

Description

Technical field: [0001] The invention relates to an in-situ leaching uranium extraction process well completion method for drilling and completion of a reagent-free in-situ leaching uranium extraction process well. Background technique: [0002] Through the improvement and optimization of the well body structure and parameters of the traditional in-situ leaching uranium production process well, the recovery efficiency is maximized, and the completion technology of the in-situ leaching uranium production process well is specifically optimized: including the well body structure, casing connection method, The method for determining the position of the screen, the form of the screen, and the determination of the passing water area. In the existing well completion process of traditional in-situ leaching uranium mining process wells, there are problems such as inaccurate positioning of the screen tube and the dislocation screen tube in the ore seam, water in the ore seam, and the ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a well completion method for in-situ leaching uranium mining process wells, which solves the problems in the prior art that the screen pipe and the ore seam are dislocated, the water in the ore seam runs through layers, and the water passing area cannot be guaranteed.

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