SU1737124A1 - Borehole tool - Google Patents

Abstract

The invention relates to mining and m. used in downhole hydraulic mining of loose, poorly bonded minerals. The goal is to increase the efficiency of the downhole hydropunitive projectile by simplifying tripping operations, the Surgeon consists of an external column (K) 1 and an internal K 2. The latter has 3 openings of disperser, pulp windows 8 and pulp windows 5. In the cavity There is a partition 4 between the holes 3 and the windows 5, and a restrictive ring 6 is placed between the windows 5 and 8 on the outer surface K 2. At the end part K 1 there is a packer sleeve 7 through which K 2 is passed. serves compressed air, which is out um from the holes 3. The mixture of water and air rises to the surface through K 1. Due to the vacuum in box 8 receives water and minerals. The pulp is passed through the windows 5 to the cavity K 1 and is discharged to the surface. 1 hp f-ly, 1 ill.

Description

The invention relates to mining and can be used in downhole hydraulic mining (SRP) of loose, poorly bonded minerals.

A well-known hydrophobic projectile is known for mining loose, loosely coupled ores, including two coaxially arranged pipes, of which the external is casing, the internal is pulping, and a submersible centrifugal electric pump is installed at the lower end of the pulping pipe.

The device works as follows. When you turn on the electric motor, the pump starts working, which sucks the pulp (water and minerals) and gives it to the surface through the pulping valve.

A disadvantage of this device is the small (up to 100 m) depth of mining of mineral deposits, limited by the elevation of the pulp by a submersible centrifugal electric pump, and the low reliability of the electrical components in the borehole flooded with water, rapid abrasive wear of the centrifugal pump blades.

Borehole hydrophobic projectile for borehole hydraulic mining of friable, poorly bonded minerals is known, including an external column located therein and an internal column of pipes with dispersant holes rigidly connected to it, communicated with a source of compressed air, and slurry receptacles formed in the end portion outer column.

Compressed air is fed through the internal string of pipes into the well and is passed through the openings of the dispersant into the annular gap. As a result, the water column is displaced (static water level in the well) with the height H of the mixture of water and air of height H + h due to the difference in the specific gravities of water in the annulus of the external pipe and gas-liquid mixture (slurry) in the annular gap. In addition, air bubbles moving upward with the liquid, envelop the mineral particles, and during expansion act as elementary pistons. At a certain saturation of the mixture with air, it is released to the surface.

The disadvantage of this device is the impossibility of axial movement of the hydrophobic projectile in the borehole during its operation to work above or below the mineral interval, i.e., it is necessary to stop mining operations and conduct tripping to increase or shorten the external and internal columns. pipes that leads to

costly.

The purpose of the invention is to increase the efficiency of the device by simplifying tripping operations.

The goal is achieved by the fact that

0, in the downhole hydropic drum, which includes an external column, an internal column of pipes with dispersant holes and a pulp-receiver and windows communicated with a source of compressed air, the external column is provided with a packing sleeve installed in the annular part of the specified column, the slurry windows are located in the end part of the inner column, and the latter is installed with the possibility of axial movement relative to the outer column and passed through the baking sleeve, while the inner column is discharged with pulp opening windows communicating

5 cavities of the outer and inner columns and located in the interval between the holes of the dispersant and pulp-receiving windows, and provided with a hollow transverse partition located between the holes of the disperser mm and the pulping windows, as well as a restrictive ring fixed on its outer surface in the interval between the slurry receiving and pulp windows.

5 Pulp-receiving windows are made with minimal clear dimensions, not exceeding the minimum sizes of pulp-opening windows. The installation on the outer column of the packing tube, located in the annular part of the outer column, makes it possible to isolate the ore interval of the well space from the cavity of the annular gap between the inner and outer columns,

5 to allow the slurry to enter the annular space through this gap, that is, to direct the slurry into the annular between the inner and outer columns through the slurry receiving and slitting windows.

0 The presence of pulpopropane windows located in the end of the inner column, and the execution on the inner column of pulpovydachny windows, informing the cavity of the inner and outer columns

5 and located in the interval between the disperser holes and the pulp-receiving windows, ensures, during mining operations, by supplying air to the inner column of pipes and creating a vacuum in the end portion of the inner

the columns sucking the pulp into the pulp-receiving windows, passing it through the lll-dispensing windows into the annular gap and delivering it to the surface.

Making the inner tubing axially displaceable relative to the outer tubing, for example, when mining one ore interval, raise or lower the projectile along the borehole axis to operate at a different interval without stopping the production process and increasing the inner and outer tubing columns, which reduces the costs on tripping operations,

A deaf transverse partition located between the openings of the dispersant and the pulp-opening windows allows, when air is supplied through the internal column, to block its access to the end portion of the internal column and direct it to the opening of the dispersant.

A restrictive ring fixed on the outer surface of the inner column in the interval between the pulp-receiver and pulp-opening windows provides for limiting the course of the inner pipe string in the transverse direction. Otherwise, without the restrictive ring, the pulsating windows of the inner column can escape from under the packer liner, which will lead to the cessation of the supply of pulp (water and mineral) to the pulp production column of pipes and stop the operation of the downhole hydroelectric block.

Execution of pulpo-receiving windows with minimum passage dimensions in the light, not exceeding the minimum passage dimensions of the pulping-opening windows, prevents clogging of large-sized minerals (for example, pebbles) of the pulping-opening windows of the downhole projectile projectile.

The drawing shows the downhole hydrophobic projectile.

The wellbore consists of an outer string of pipes 1, an inner string of pipes 2 located therein. The inner column 2 has openings of a dispersant 3, below which there is a transverse partition 4 deaf, under which pulp-opening windows 5 are made, behind which, in turn, is placed restrictive ring 6. In the end part of the inner column 2, pulpopriemny windows 8 are made. A packing sleeve 7 is installed in the end part of the outer column 1.

Well hydrophobic sludge d works as follows.

After the installation of the hydropower well in the well, compressed air is supplied to the inner string of pipes 2. When it reaches the blind transverse partition 4, it passes through 5 disperser holes 3 In the annular gap between the inner 2 and outer 1 columns of pipes, the water column displaces (static water level in the well) height H of the water mixture with 10 air height H + h , due to the difference in specific gravity of water in the annulus of the external column and gas-liquid mixture (pulp) in the annular gap. At the same time, due to the occurrence of a vacuum in the 5 end portion of the inner string of the pipe 2, the flow of water and minerals into the pulp-receiving windows 8 (pulp flow in the annular between the inner 2 and outer 1 columns of

0 interferes with the packer liner 7), bypassing them through the pulping windows 5 into the annular gap and then transporting the mineral particles to the surface. Filling windows with pulping 5 s

5 of the inner side of the individual pieces of rock during the absorption of minerals prevents the implementation of pulping pearl windows 8 with a minimum passage dimensions in the light, not exceeding the minimum passage dimensions of the pulping windows 5.

The advantage of the proposed technical solution is to increase labor productivity by simplifying

5 tripping operations.

Claims (2)

01. Downhole hydrophobic reservoir, including an external column located therein and an internal column of pipes with dispersant openings and pulp-receiving windows communicating with a source of compressed air, characterized in that, in order to increase its efficiency by simplifying tripping operations, the external column is provided with a packer sleeve, installed in 0 the end part of the specified column, the pulpane receiving windows are located in the end part of the inner column, and the latter is installed with the possibility of axial movement relative to the outer column and 5 is passed through a packer sleeve, while the inner column is made with pulp-opening windows that communicate the cavities of the inner and outer columns and are located in the interval between the holes of the dispersant and the pulp-receiver windows and is provided with a deaf cross section. 2. Snar d pop.1, different partition located between the hole. that pulp windows are made disperser and pulping with minimum pass dimensions windows, as well as a restrictive ring, in the light, not exceeding the minimum rigidly fixed on its outer dimensions, through-5, throughput surfaces in the interval between slurry-windows, nymi and pulpovydachnymi windows.