Drilling water stop

Abstract

The invention relates to a drilling water stop. The difference of the drilling water stop lies in that the water stop comprises a right-hand threaded grouting pipe and a left-hand threaded grouting pipe; the grouting pipes are connected through right-hand and left-hand threaded couplings; an installation steel ring capable of moving up and down along the grouting pipe at the upper part is arranged on the grouting pipe at the upper part; a plurality of strips of round steel are uniformly arranged along a circumferential direction on the installation steel ring; the tail ends of the round steel are connected with arc-shaped thick steel sheets; matched rings, conical steel sleeves respectively provided with a smaller upper end and a bigger lower end and a plurality of rubber sleeves are sequentially arranged on the grouting pipe at the lower part from top to bottom; a washer is respectively arranged between every two adjacent rubber sleeves; limit steel rings for limiting the positions of the rubber sleeves are fixedly arranged on the tail end of the grouting pipe at the lower part; the conical steel sleeves, the rubber sleeves and the washers can move up and down along the grouting pipe at the lower part; when ascending, the arc-shaped thick steel sheets can support the matched steel rings; the arc-shaped thick steel sheets can clamp the conical steel sleeves. According to the drilling water stop, the water stopping and grout stopping effects are good, the detachment is convenient, and the use cost is low.

Description

technical field [0001] The invention relates to a borehole water stopper. Background technique [0002] In the process of hydrogeological investigation in mining areas, it is often necessary to measure the water permeability of rock formations by means of segmented pressure water tests. This process requires the use of water stoppers to separate the test section from the upper hole section. Currently, there are There are two types of water stop plugs: water expansion type and air expansion type. These two types of water stop plugs have the following problems: installation and disassembly are inconvenient, time-consuming and laborious; Uneven, easily damaged capsules, high cost of use. Contents of the invention [0003] The object of the present invention is to overcome the disadvantages of the prior art, and provide a borehole water stop, which has good water and slurry stop effects, is easy to disassemble, and has low cost of use. [0004] In order to solve the above te...

AI Technical Summary

Problems solved by technology

[0002] In the process of hydrogeological investigation in mining areas, it is often necessary to measure the water permeability of rock formations by means of segmented pressure water tests. This process requires the use of water stoppers to separate the test section from the upper hole section. Currently, there are There are two kinds of water stop plugs: water expansion type and air expansion type. These two types of water stop plugs have the following problems: installation and disassembly are inconvenient, time-consuming and laborious; Uneven, easily damaged capsules, high cost of use

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