SU1314068A1 - Apparatus for recovering material from underground formation through wells - Google Patents

Abstract

The invention relates to mining and geology and can be used in downhole hydraulic mining and well hydraulic testing of minerals. The purpose of the invention is to improve the reliability of the device and the efficiency of extraction of mineral deposits with unstable rocks and with a high content of coarse debris. The device includes an external 1, central 2 and an additional 3 columns (K). Additional 3 has holes 4 in the form of round or transverse w, spruce and fixed in the reservoir. The fastening To 3 and 6 provided by the packer 7, the cavity of which the hose 8 is in communication with a source of compressed air. The packer 7 is located in the annular space K 1 and 2. The upper edge of the packer 7 is installed at the level of the receiving windows 18. After the device is installed in the well, pressure water is supplied to the working nozzle 15 of the hydraulic elevator and the hydraulic monitor 9 and through the holes 4 the mineral is washed out the formation of the extraction chamber 24. The pulp through the holes 4 and the receiving ports 18 enters the receiving chamber of the hydraulic elevator, is formed by the profiled bottom 19 and is sucked into the displacement chamber 13. Then through the diffuser 14 and K 2 the pulp is discharged to the surface. 1 il. with (O (lc gaffa with 4 :; o oi oo

Description

The invention relates to mining and geology, and can be used in well hydroproduction and in hydraulic well testing of minerals.

The purpose of the invention is to improve the reliability of the device and the efficiency of extraction of mineral deposits with unstable rocks and with a high content of coarse clastic rocks.

The drawing shows a device located in the well during its operation, a general view.

A device for extracting material from subterranean formations through wells contains an outer column 1 rigidly connected to the central 2 and having the possibility of axial movement and rotation with respect to the additional column 3. The column 3 has openings 4 made, for example, in the form of circular or transverse slits. The rigid fastening of the column 3 in the reservoir 5 and the casing 6 is provided by an elastic packer 7, for example of the pneumatic type. The cavity of the packer 7 is connected via a hose 8 with a source of compressed air (not indicated), columns 1 and 2 are rigidly connected and hydraulically communicated with the working body of the unit, including a jetting device 9, rigidly fixed in the external column 1 so that its output section does not exceed the limits of the column 1, the hydraulic elevator and the packer element 10, for example, of the mechanical type, mounted on the body 11 of the working body with the possibility of flushing in the bearing 12. The hydraulic elevator includes a mixing chamber 13, a diffuser 14, a working nozzle 15, a receiving chamber 16 with a suction zone 17 and receiving ports 18 made, for example, in the form of longitudinal slits.

The receiving chamber 16 is an annular cavity enclosed between the mixing chamber 13 and the diffuser 14 on the one hand and the additional column 3 on the other. The suction zone 17 is bounded below by the bottom 19, which is the surface of rotation around the device axis of a curved line, which can be taken, for example, cycloid, Pascal cochlea, Archimedes spiral, etc. The receiving chamber 16 is separated from the cavity of the external column 1 by a jumper 20. At the same time, the delivery of pressure water into the cavity of the working nozzle 15 of the hydraulic elevator is carried out by means of pipelines 21 installed inside the receiving chamber 16. To restrict the movement of the additional column 3 relative to the outer 1 on the last stage but retaining ring 22.

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The device works as follows.

In the well cased with column 6 in the overlying rock section 23, the device is lowered, held by the outer column 1, while the additional column 3 is provided on the stop ring 22. The device is placed in the well so that the upper end of the additional column 3 is within the casing columns 6. The length of the column 3 is chosen equal to (or less) the power of the productive formation 5. Then turn on the pump (not shown) and supply pressure water to the working nozzle 15 of the hydraulic elevator and the hydraulic monitor 9, through which 4 holes erosion of the mineral with the formation of the extraction chamber 24 is effected. The resulting pulp erosion is through the openings 4 of the column 3 and the receiving ports 18 enters the receiving chamber of the hydroelevator. The slurry stream is then formulated with a profiled bottom 19 and sucked into the mixing chamber 13, after which it passes to the surface through the diffuser 14 and the central column 2. As the productive reservoir 5 is developed, new sections of holes 4 that have not yet been in service are included in the operation. In the case of pinning the holes 4 of the column 3 or deterioration of the filtration capacity of the zones formed in the mining chambers 24 of oversized material, the jetting crane 9 is lowered by manipulating the external column 1 and the holes 4 or filtration zones are rinsed. Using the packing element 10, the mineral particles are prevented from entering the cavity of the additional column 3, which is located in relation to the external column 1. In the process of erosion of the productive formation 5, the column 3 prevents the walls of the well from collapse.

Claims (1)

Invention Formula A device for extracting material from subterranean formations through wells, containing an outboard column of pipes connected to a source of pressurized water with piston receiving windows in its end part and a central column installed in it, an integrated jet monitor located above the receiving windows and hydraulically communicated with the cavity of the external column, hydraulic elevator with a receiving chamber, a mixing chamber installed coaxially with it by a nozzle, communicated hydraulically with the cavity of the outer column, and a packer mounted on the surface of the inner Another column in the interval between the receiving windows and its end, characterized in that, in order to increase the reliability of the device and the efficiency of extraction of mineral deposits with unstable rocks and with a high content of coarse debris, it is equipped with an additional perforated column. 2 13140684 installed outside the outer column, reception windows, the latter are located in coaxially with the possibility of axial movement between the inlet of the mixture of rotation of the external column in the additional chamber of the hydraulic elevator and the hydraulic, the packer is located in the inter-ronitor, and the perforation holes in the outer space of the tube and additional-5 to the additional column are made body columns and is set to its top-size, not exceeding the size of the rim edge at the level of the lower edge windows.