SU1442660A1 - Device for recovering materials from underground formations - Google Patents

Abstract

The invention relates to mining and geology and can be used in the testing of productive horizons, for well mining of minerals and for the expansion of wells. The goal is to increase the volume of recoverable rocks due to their lateral erosion. A device for extracting materials from subterranean formations includes a double drill string (K) from outer and inner K 1, 2 and rock-destroying its organ (PRO) 4. In the central channel 5 PRO 4, a saddle 6 is made to install the ball valve 7. After the well has been drilled To a given horizon in K 1, a ball valve 7 is lowered to ensure the overlap of the central channel 5. A working agent is supplied through the annular space, which enters the jetting nozzle 8 PRO 4. Circular scouring of rocks is carried out during rotation of the boring K. D The nozzle is mounted perpendicular to the longitudinal axis of the device in a window made in the wall of the PRO 4 between the seat 6 and the annular gap 3. 2 Il. 45 (L

Description

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The invention relates to geology and mining and can be used in testing productive horizons, for well mining, and also in expanding squachines.

The goal of H3o6peTeHffH is to increase the volume of recoverable rocks by ensuring their lateral erosion.

FIG. 1 shows the proposed device, a longitudinal section; in fig. 2 - rock destructive tool, cut on the nozzle.

A device for extracting materials from subterranean formations includes a double drill string consisting of a short inner 2 and outer 2 columns, an annular gap 3, a rock-breaking body 4 with a central channel 5 and a supporting seat 6, a ball valve 7 and a transverse jetting nozzle 8.

The device works in the following way.

The well is drilled with a free flow channel 5 of the rock demolishing body 4, i.e. in the absence of a ball valve 7. In this case, the flushing agent is supplied between columns 1 and 2 to the annular gap 3. With the rock breaking body 4, a core is formed which is discharged to the surface through the inner string 1. While drilling, mud may be poured into the annulus of the well to effectively support its walls. According to the extracted core, the judge is on the geological structure of the drilled massif and productive horizontal mining,

After conducting the well up the ass. g of the South horizon, on which it is necessary to carry out large-volume extraction of the rock mass, the ball valve 7 is lowered along the internal column, which lowers onto the support seat b and closes the central channel 5. Thereafter, with the internal column blocked on the surface, the annular space is fed under pressure working agent for erosion of rocks, for example, er industrial water. The working agent under pressure can also be supplied through the internal column 1 with the annular space blocked on the surface, or the agent can be introduced simultaneously into the internal column 1 and the annular space. Due to the fact that the ball valve 7 closes the central channel 5, the entire working agent enters the transverse jetting nozzle 8, where it is formed into the pressure head

jet. As the drill string rotates, the rocks are eroded at a given horizon, while the slurry fractions are discharged through the annulus to the surface, and the coarse fraction is stored in the over-well. After the washing of the rock mass, the outlet of the inner column 1 is opened on the surface and a washing agent is supplied through the annular space, while the rock-breaking body 4 is supported on the gassed

The 2nd rock and, due to the penetration of this rock, the ball valve 7 is pushed to the annular gap 3. Here the ball valve 7 is picked up by the upward flows of the washing agent and is carried along the inner column 1 to the surface, where it is removed

0 for further use. When the ball valve 7 is removed, the entire flushing agent is directed into the annular gap 3, in this case, the gassed rock mass is sucked into the internal column 1 and the mass is lifted to the surface. In the future, if necessary. Bridges these operations are repeated.

Claims (1)

Invention Formula p A device for extracting materials from subterranean formations, including a double drill string, a rock-breaking organ with a central channel in its lower part, mounted on the end of an external pipe with the formation of an annular gap d between its lower part and the end of the inner tube, characterized in that, in order to increase the volume of recoverable rocks by ensuring their lateral erosion, it is equipped with a jetting nozzle, and in the central channel of the rock-breaking 0 of the organ is provided with a support seat for mounting a dump ball valve, while the jetting nozzle is installed perpendicular to the longitudinal axis of the device in a window made in the wall of the poro-destructive organ between the supporting  saddle and annular gap. five FIG. 2