SU67892A1 - Method of drilling well - Google Patents

Description

This invention relates to methods for setting up wells for extracting water.

A distinctive feature of the new method is that in the lower (downhole) part of the borehole an additional sample of soil is made to form a reservoir.

In order to form a reservoir in the downhole part of the well, a device has been proposed, made in the form of a pipe inserted into the well with longitudinal slots and a lever pivoting in a vertical plane, at which the soil looses at the bottom.

Known methods of device wells, providing a large flow rate of water, very complex, time-consuming and costly.

The proposed method of device wells does not require large expenditures. The equipment for the proposed method can be made from waste products, conventional pipes can be used as casing, and obsolete smoke tubes as drill rods.

FIG. 1 schematically shows the device of the well proposed by the method; in fig. 2 - constructive design of ripper

for the device of a reservoir at the bottom of a well.

After penetrating the weak (loose, limestone and peaty) rocks to the desired depth, the groundwater reservoir is washed through the thick-walled casing 1 (Fig. 1) by the known techniques. Work on the erosion of the reservoir can be accelerated using a compressor unit and a ripper.

The simplest ripper (Fig. 2) consists of a thick-walled pipe 1, having a slot cut from the lower end upwards at a distance of 500-1500 mm. This slot includes a lever 2 attached by a hinge pin 4 to the shackle on the outside of the pipe, and a cutter 3 is welded to the free end of the lever. The lever has holes through which it fastens to the cable 5 going upwards.

To strengthen its strength, the lower end of the thick-walled pipe has a welded ring 6. By pulling the cable-5, the lever rotates clockwise around the hinge 4 and cuts the soil, which is mixed with water and pumped out. By the amount of soil pumped to the top, the volume of the reservoir of the well is determined.

The best results are achieved if the bottom of the reservoir lies on solid, unbreakable soils (heavy

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clay or rock), and the arch is little loose.

The dimensions of the reservoir can be (Fig. 1): I, up to 25 m, Yag-up to 5 l and D-up to 10.

Subject invention

Claims (2)

1. A method of arranging a well for producing water, which is characterized by the fact that around the bottom of the borehole, additional soil is sampled to form a reservoir. 2. A device for carrying out the method according to claim 1, characterized in that it is made in the form of a pipe inserted into a well with longitudinal slits and a lever pivoting in a vertical plane, which serves to loosen the soil. FIG. one a TfJwzw f .-i; -V- «-. . , U .. . - ST .: -; ; -vA-t-- -; f v: $