SU1260526A1 - Method of hydraulic mining of minerals through wells - Google Patents

Description

The invention relates to mining and can be used to extract materials from subterranean formations through wells.

The aim of the invention is to increase the efficiency of hydrodynamic production due to the intensification of hydrotransport of the material along the bottom of the chamber.

FIG. 1, 2 and 3 are diagrams illustrating the sequence of operations according to the method.

The method is illustrated by the example of testing the placer formation. A borehole 1 is drilled to the formation, in which a pressure column 2 with a hydraulic monitor 3 and a pulp production column 4 with a suction 5 are placed, which is placed in the over-run of the borehole 1. After the installation of the jetting unit in well 1, the wellhead is sealed with a preventer, the cavity of which is communicated with the compressor, and also with a high pressure storage tank 6 for compressed air, for example, under pressure up to 25 MPa.

After that, the pressure column 2 under pressure delivers fluid from the pump and begins erosion of the reservoir array with a jetting jet formed in the jetting unit 3. At the same time, from the compressor, compressed air is supplied to the chamber 7 formed during erosion and air-pulp section 8 is created at the level slightly exceeding the suction level 5. As the material is washed out, it is carried out due to the flow of liquid from the jetting jet to the suction 5 and enters the pulp production column 4 with output to the surface.

As the distance from the hydraulics 3 increases to the bottom of the chamber 7, the conditions of material hydrotransport along the bottom of the chamber gradually deteriorate and a moment comes when the diffuse material begins scap

0

five

five

0

five

0

Leave on the bottom. As the material accumulates on the bottom, the latter is flooded. When flooded with the help of flow meters installed in front of the pump and at discharge of the pulp-output column 4, the volume of the liquid infringed by the bottom flooding is determined from a stable operating level to the flooding. The air-slurry separation level in chamber 7 is determined using known sensors.

After that, using a special high-speed valve, pulsed air is supplied from storage tank 6 to chamber 7. The inlet pulse is calculated so that the volume of injected air, reduced to the pressure in chamber 7, does not exceed the volume of liquid that went to the flooding, i.e. Liquid volume between suction levels 5 and air-slurry section 9 before the pulsed air intake.

In the case of pulsed air intake, the pulp level in chamber 7 drops abruptly from level 9 to level 8. At this moment, the liquid in chamber 7 is carried at high speed into the inlet 5 of the pulp-output column, and as a result, there is an effective flushing of material deposited on the bottom. from which it enters the pulp production column 4 and is discharged to the surface.

If necessary, the above operations to intensify the hydrotransport of the material in the process of erosion of the array are repeated several times, and the height of the flooding can be gradually increased in order to increase the flow characteristics of the flush streams.

The volume of pulsed air must be less than the volume of the liquid going to the flooding, in order to prevent air from breaking through into the pulp production column.

and:

Rie.2

Compiled by N. Rudenko

Editor I. Rybche} 1Tokhred I. VeresKorrektor A. Zimokosov

Order 5202/28 Circulation 470 Subscription

VNIIPI USSR State Committee

for inventions and discoveries

I3035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

fig.Z

Claims (1)

METHOD OF WELL BORE HYDRO-PRODUCTION MATERIALS, including placement of a pressure column with a hydraulic monitor and a pulp-dispensing column with an inlet in a well, washing out the material with a working agent jet, introducing compressed air into the chamber, maintaining the air-pulp section in the chamber at a level with a hydraulic monitor and a pulp-dispensing inlet hydrotransporting material along the bottom of the chamber, issuing pulp to the surface, characterized in that, in order to increase the efficiency of hydraulic production by intensifying hydrotransport, they flood chamber of the accumulation of material on the bottom and then the pulse is introduced into the chamber is further compressed air in an amount not exceeding the amount of pulp in the chamber at a pressure equal to the working air pressure in the chamber. SU ,, „1260526 FIG. ?