SU866100A1 - Borehole drilling arrangement - Google Patents

Description

t

The invention relates to a drilling technique and can be used for drilling shaft wells in agriculture.

A device for drilling vertical mines, including a central body and a working body, made in the form of knives t ", is known.

In the process of drilling the well shaft during rotation and axial movement of the body of the device in contact with the walls of the well shaft, resulting in friction.

The closest in technical essence to the present invention is a well drilling dp device, comprising a housing with lower and upper blades 2.

In the known device, during the drilling of wells, a portion of the soil cut off by the BepxmtM knife enters the resulting gap between the casing and the borehole wall, as a result of which.

2

There is no friction requiring additional energy.

The purpose of the invention is to improve the working conditions of the drill.

This goal is achieved by the fact that in the drilling drill device, which includes a housing with shanknyi and upper blades, the housing is equipped with a goat installed in its upper part with the possibility of contact

10 with well walls.

At this, the visor is made elastic.

On 'F. I - schematically shows a drill; Fig 2 - node 1 fmg.TS

IS on 4ng. Z - a drill top view} on fn.4korik.

Device with guide tube

1Contains a cylindrical body 2, on the lower end of which rigidly 10 the lower knife 3 is fastened, and on. upper end - upper knife 4, on the body

2, in the upper part, under the upper blades, the visors 5 are fixed, closing the gap between the borehole wall and the housing 2.

The device works as follows

When drilling a well, the rotation and axial movement of the drill rod 6 is transmitted through the safety pipe to the dual body 2. At the same time, the lower and lower 3 and higher 4 knives are deep in the ground and cut off around the circumference. The soil cut by the lower blades into the cavity of the drill enters through the hole in the lower part of the cylindrical body 2, and the soil cut by the upper blades 4 enters the body from above.

Soil penetration into the gap x between the casing and the borehole wall is eliminated due to installation of an elastic visor 5 under the upper blades. In this case, the cut soil along the visor 5 enters the device body 2,

The use of a visor in the drilling rig of the proposed design will allow an increase in the productivity of work during drilling.

Invention Formula

Claims (2)

I. Device for drilling wells, including housing with lower and upper blades, characterized by about what | in order to improve working conditions, the casing is equipped with a kozf'koi, ustaiopenenit in its upper part with the possibility of contact with the borehole walls 2. The device according to p, I, O TL and h ay c it so that the visor is made elastic. Sources of information taken into account in the examination 1, Borisovich V, T, etc. Drilling of large diameter wells, M ,, Nedra% 1977, p. 15, 2, Borisovich V, T, et al. Drilling of large diameter wells, M, Nedra, 1977, p. 19,