SU451835A1 - Device for isolating zones of washing fluid and water inflow in wells - Google Patents

Description

(54) DEVICE FOR ISOLATION OF ABSORPTION ZONES

FLUID FLUID AND WATERING FLOWS

The proposed device relates to the field of drilling.

Devices are known for isolating the absorption zone of industrial fluid and water influxes in wells, including a drill string and a pick-shaped bit, which in the area of water absorption and production inflows drills a dry quick-setting plugging mixture delivered in separate portions in containers (for example, in canvas bags ).

At the end of drilling, cement mortar is injected into the well and maintained until a cement stone is formed, which is then drilled until the original dimensions of the well are restored.

The disadvantages of the known devices are that they do not provide a deep crushing of the cementing mixture into the pores and cracks of the borehole wall, which, when drilling is resumed, leads to the destruction of the cement crust formed, which does not exclude the diverter. time spent on cementing

 .

with.:, ///

WELLS

the wellbore in the zone of absorption and drilling of cement stone until the original dimensions of the wells have been restored5, which overlaps the rate of drilling of the well and

cost of this work.

The present invention differs from the known ones in that it is provided with a reflector placed above the bit, and the reflector is made in the form of a screw with

coils of spiral, reverse BpameHHHJ chisels.

A device in such a manner ensures the continuity and efficiency of isolating the water absorption zone and the water supply.

wells without blocking the trunk.

FIG. 1 shows the proposed device in general; in fig. 2 is a section through A-A in FIG. one.

The device has a roller bit J

the reflector 2, the back pressure ball valve 3 and the trowel element 4, made in the form of an adapter with elastic blades, radially mounted on it.

In the zone of water absorption and water inflow of the well, the quick-hitch cement mix in the envelopes is drilled with a roller bit 1 while simultaneously blocked with water until a viscous solution is formed in the cross section of the well, which is continuously displaced in the direction of the well, and the figure of the well is displaced. when the waterproofing bridge is moved by the reflector 2, it is crushed and the trowel 4 is rubbed into the pores and cracks of the borehole wall, forming a cylindrical water p. perforated jumper of water absorption zone and water inflows without wellbore obstruction.

Subject and s and o r e te

Claims (2)

1. A device for isolating absorption zones of industrial fluid and water inflows in wells, including a roller bit, an adapter and a check valve, characterized in that, in order to increase the efficiency of the insulation works in the well, it is equipped with a reflector placed above the bit. 2. The device according to claim 1, that is, so that the reflector is made in the form of a screw with turns of a spiral, inverse to the rotation of the bit.