Drill-hole waterstop device and method

Abstract

The invention relates to a drill-hole waterstop device. The drill-hole waterstop device comprises a drilling machine, a drill pipe, a packer and a casing pipe, wherein the drill pipe is connected withthe drilling machine, one end of the drill pipe is connected with a slurry supply device, the other end of the drill pipe is used for extending into a drill well, the packer is arranged on the drillpipe in a sleeving mode and located in the drill well, the packer communicates with an air supply unit, the casing pipe is arranged on the periphery of the packer in a sleeving mode, and a certain gapis left between the casing pipe and the inner wall of the drill well. The slurry supply device is used for injecting slurry into the drill well through the drill pipe, and the packer is configured tobe that when the air supply unit supplies air to the packer, the packer expands and the size of the packer is increased, so that a channel between the drill pipe and the casing pipe is closed. The invention further relates to a waterstop method utilizing the drill-hole waterstop device. The waterstop method comprises the steps that the casing pipe is down into the drill well, then the packer is down into the casing pipe, the channel between the casing pipe and the drill pipe is blocked off, the slurry is supplied into the drill well through the drill pipe, and therefore a gap between the casing pipe and the well wall is filled with the slurry. According to the waterstop method, the waterstop time can be shortened, the slurry using amount is decreased, and the good waterstop effect is achieved.

Description

technical field [0001] The invention relates to the drilling of soil layers or rocks, in particular to a drilling water-stopping device and a water-stopping method for drilling wells. Background technique [0002] In hydrogeological drilling, in order to obtain accurate and stable confined water level and high-quality deep groundwater resources, it is necessary to carry out drilling water sealing work. Waterstop methods can be divided into two types: temporary waterstop and permanent waterstop. Temporary water stop is mainly used for hydrogeological exploration, and permanent water stop is mainly used for water supply wells and underground water drainage drilling construction. Temporary water-stopping materials mainly include kelp, cowhide, chemical water-stopping agent, clay, tung oil lime, asphalt, rubber and other water-absorbing and expansive substances, and permanent water-stopping materials generally use cement. Temporary water-stop materials often have poor water-st...

AI Technical Summary

Problems solved by technology

The existing water stop methods generally have the following problems: the operation process is relatively cumbersome, the amount of cement is large, and the cement slurry solidifies for a long time

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