System and method for in-situ repairing of soil by using horizontal well

Abstract

The invention discloses a system and a method for in-situ repairing of soil by using a horizontal well, and relates to the field of soil remediation. The system for in-situ repairing of soil by usingthe horizontal well includes the horizontal well and medicament injection devices, the horizontal well includes a well tube and injection tubes, and injection cavities are arranged in the well tube; two ends of every injection tube are an injection end and a connection end respectively, the injection ends are inserted into the well tubes and are arranged in the injection cavities, and the connection ends are connected with the medicament injection devices; and the sidewall of every injection cavity is provided with a plurality of sieve seams. The method for in-situ repairing of soil by using the horizontal well includes a hole drilling step, a horizontal well installation step and a medicament injection step. An installation hole is drilled in a soil area to be treated in the hole drillingstep, a pulling device is used to pull the horizontal well with the sieve seams in the installation hole in the horizontal well installation step, and medicaments for treating remediation are injected into the injection cavities of the well tube of the horizontal well in the medicament injection step. The horizontal well is paved, so the contact area of the tube segment of the horizontal well anda pollution medium is increased, and the in-situ repairing effect is improved.

Description

technical field [0001] The invention relates to the field of soil pollution remediation, in particular to an in-situ horizontal well soil remediation system and method. Background technique [0002] At present, in soil remediation technology, the in-situ injection technology uses certain equipment to inject chemical agents into the ground, and through the physical and chemical interaction between chemical agents and pollutants, the mobility of pollutants is reduced, and the toxicity of pollutants is reduced or changed. A non-toxic soil remediation method. This restoration technology has the advantages of strong universality, good treatment effect, and short restoration time. It can also be repaired in situ and is less affected by the ground and buildings on the site. It can be combined with physical and microbial technology for restoration, and has broad application prospects. Among them, the inhomogeneity of soil permeability and the spatial inhomogeneity of pollution dist...

AI Technical Summary

Problems solved by technology

[0005] (1) It is greatly affected by factors such as uneven soil permeability or uneven pollution distribution;

[0006] (2) In order to reach the target treatment area, the vertical well may need to pass through other formations to reach the target treatment area. At this time, the injection pressure often causes the deformation of the wall of the injection well hole or between the formations, forming a preferential channel, causing the injection agent to return vertically. flow or flow between formations, cannot be effectively repaired;

[0007] (3) The contact efficiency (contact area, contact time, etc.) between chemical agents and soil is limited; the restoration efficiency is low;

[0008] (4) In the soil treatment area, in order to achieve the effect of restoration and treatment, it is often necessary to set up multiple vertical wells, which is less economical;

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