RU168322U1 - EXPLOSIVE CHARGE FOR WATERFILLED WELLS - Google Patents

Abstract

The sleeve consists of removable and non-removable parts separated by perforations. On both sides of the perforation, brazing elements made of elastic wire are fixed by brazing. A tear-off and extraction means is attached to the spacer element on the extractable part with a length sufficient to tear off and pull the extractable part from the well from the surface. The diameter of the well and spacer elements is greater than the diameter of the sleeve, and the length of the non-recoverable part is taken equal to the length of the explosive charge.

Description

The utility model relates to mining, namely, devices for temporary fastening and placement of explosives in a well, and can be used to equip explosive dry and flooded downstream unstable and swimming-prone wells.

Known explosive charge for loading waterlogged wells (RF patent No. 80549, publ. 02/10/2009). The essence of the utility model: the explosive charge for loading waterlogged wells is made of long cartridges consisting of 1-3 intermediate detonators of loose powder explosive and 1-2 main charges, the explosive layer height of each main charge does not exceed 20 charge diameters with the length of the acceleration section detonation of more than three charge diameters, the detonation of each long cartridge is carried out independently on an individual downhole blast line; while the borehole charge of long cartridges, the average density of explosives of which is less than 1000 kg / m ³ , is formed using high-density ballast, mounted on one of the ends of each long cartridge.

The disadvantage of this method is the possibility of collapse or swimming of the well during the period of work on loading the well.

A known cartridge for loading flooded wells with non-water-resistant explosives (RF patent No. 65206, publ. July 27, 2007). A cartridge is proposed for loading flooded wells with non-water-resistant explosives, containing a shell of durable polyethylene in which the explosive is placed. The design feature is that the cartridge has an additional outer shell made of single or double woven polypropylene and an inner sealed shell made of polyethylene, in which the shell with explosives is placed. The number of shells can be increased through the use of additional shells made of polyethylene, for example, to enhance any properties. The outer shell protects the cartridge from mechanical damage from external factors, and the inner shell ensures the tightness of the cartridge. A flooded well charged with these cartridges can be in standby mode for blasting for a long time, while the detonation properties of the explosive are preserved.

The disadvantage of this method is the complexity and increased complexity due to the need to use gas, as well as the possibility of collapse or swimming of the well during the period of work on loading the well.

A known method of fixing the walls of wells in dispersed soils (RF patent No. 2439245, publ. 10.01.2012). Wells are kept from shedding with a protective film. As a protective film, a sealed film case is used, which is placed in the well and filled with compressed air. Moreover, the lower part of the pencil case is heavier by soldering the load, and in the upper part the valve block with a manometer is placed and connected to a source of compressed air. The diameter of the pencil case above the surface of the earth under the pressure of compressed air exceeds the diameter of the well by at least 10 cm. It provides high adaptability of fastening the walls of wells in dispersed soils and reduces labor costs. Also, when stacked piles are installed, the porosity of the soil walls of the wellbore is preserved, which allows the binder solutions to penetrate into the contact layer of the soil and thereby increase the bearing capacity of the stuffed piles; when installing filtration wells, the preserved natural porosity of the soil in the contact layer does not prevent the migration of groundwater into them.

The disadvantage of this method is the complexity and increased complexity due to the need to use compressed air, as well as the possibility of collapse or swimming of the well during the period of work on loading the well.

A known method of loading wells with running water (RF patent No. 2163343, publ. 02.20.2001). The essence of the method of loading a well with running water with a non-water-resistant explosive is as follows: sealing the wellhead, lowering the sleeves of film material with a load at the end, supplying gas (working agent) to it under a pressure exceeding the hydrostatic pressure of the water column in the well and displacing from her water. The upper end of the sleeve is put on a funnel, gas is supplied to the sleeve under pressure, the sleeve is expanded, pressed to the surface of the well, water is displaced from the well into the array, the gas pressure in the sleeve is reduced to atmospheric and the sleeve is filled with a non-waterproof explosive. When charging a well with a high water influx, the upper end of the sleeve is connected to the barrel of the drum feeder and clamped by the body at the wellhead, gas is supplied to the sleeve under pressure and, without reducing the gas pressure in the sleeve, it is filled with explosive by the drum feeder, which simultaneously serves as a gas shutter creating excessive pressure in the sleeve. When the water level in the well is more than 1/3 of its depth, the lower end of the sleeve is connected to the end of the elastic and flexible support in the form of a rod or tape, the resulting assembly is lowered into the well. The end of the sleeve is pressed by the end of the elastic support to the bottom of the well, the upper end of the sleeve is connected to the drum feeder body, gas is supplied under pressure and, without reducing the gas pressure in the sleeve, the sleeve is filled with explosive to a height equal to or higher than the water level in the array. The flexible support is removed from the well by winding it onto the drum, and the well is continued to be charged with a drum feeder.

The disadvantage of this method is the complexity and increased complexity due to the need to use compressed air, as well as a high probability of collapse of the well during the loading period.

Known explosive charge for flooded wells, adopted as a prototype (RF patent N 108129, publ. 09/10/2011). The essence of the utility model: the explosive charge for waterlogged wells is made in a waterproof polymer sleeve with a hermetically sealed lower end placed in a pre-drained well, the diameter of which is larger than the diameter of the waterproof polymer sleeve, from ammonium nitrate explosive cartridges in a waterproof polymer shell, with a diameter less than the diameter waterproof polymer sleeve. The proposed explosive charge allows blasting with non-water resistant explosives in flooded mountains in previously drained wells with diameters from 0.16 to 0.25 m and a depth of 18 m with an initial water level in the wells of up to 12 m.

The disadvantage of this charge is the possibility of collapse or swimming of the well during the period of work on loading the well.

The technical result of the utility model is the elimination of the probability of collapse of the wells in the process of loading wells due to temporary fastening.

The technical result is achieved by the fact that in the explosive charge for waterlogged wells, including an explosive in a waterproof polymer sleeve with a hermetically sealed lower end, the initiation means and jamming of inert material placed in the well, according to a utility model, the sleeve consists of removable and non-removable parts separated by perforation, and on both sides of the perforation, spacers of elastic wire are fixed by brazing, I attach to the spacer element on the extracted part means the separation and recovery of a length sufficient to detach and pulling out from the hole portion extracted from the surface, the diameter of the well and spacer elements take longer sleeve diameter and length unrecoverable portion taken equal length explosive charge.

The technical result is also achieved by the fact that as a means of extraction and separation, a rope is used.

The technical result is also achieved by the fact that the sleeve is folded with a longitudinal accordion and fastened with water-soluble screeds.

The technical result is also achieved by the fact that the length of the extracted part is taken equal to the length of the stem from inert material.

The technical result is also achieved by the fact that the length of the non-recoverable part is taken equal to the length of the explosive charge.

The explosive charge for flooded wells is illustrated by the diagrams: figure 1 shows a diagram of a sleeve installation in a flooded well, a vertical section, figure 2 shows a diagram of a sleeve filled with water in a well, a vertical section, figure 3 shows a diagram of a sleeve installation in a flooded well, vertical section, in FIG. 4 shows the appearance of a deployed sleeve with perforation, where:

1 - rock mass;

2 - downhole;

3 - water in the downhole 2;

4 - waterproof polymer sleeve with hermetically sealed

bottom end with load 12 at the end (for example, stone);

5 - water in the inside of the sleeve 4;

6 - waterproof explosive;

7 - waveguide;

8 - fighter cartridge.

9 - the removable part of the sleeve 4;

10 - non-recoverable part of the sleeve 4;

11 - perforation separating the extracted part 9 and the non-extracted part 10 of the sleeve 4;

12 - cargo, for example, rock;

13 - spacer element of elastic wire, fixed by soldering on the extracted part 9 of the sleeve 4;

14 - a spacer element of elastic wire, fixed by soldering on the non-removable part 10 of the sleeve 4;

15 - Binko tape, mounted on a spacer element 13 of elastic wire, mounted on a removable part 9 of the sleeve 4 (the diameter of each spacer element 13 and 14 in working condition take more than the diameter of the borehole 2).

Currently, the mining and geological conditions of field development are constantly deteriorating, which leads to a decrease in safety and cost of work. For example, wells prone to collapse and swimming must be charged with explosives immediately after removing the drill string, which leads to costly downtime of charging machines, along with a general deterioration in work safety. At the same time, the share of unstable wells is constantly growing. The proposed technology will solve this problem with the creation of temporary fastening of wells due to the hydrostatic column in a waterproof polymer sleeve 4 with a hermetically sealed lower end.

The explosive charge for flooded wells includes the following elements. Before the descent of the waterproof polymer sleeve 4 with a hermetically sealed lower end, the extracted part 9 and the non-removable part 10 of the sleeve 4 are perforated to create a perforation line 11. Also, spacer elements 13 and 14 of elastic are fixed to the sleeve 4 at a distance of not more than one diameter of the well from each other wire. For unimpeded descent of the spacer elements 13 and 14, they are fastened, for example, with masking tape, which is torn from the pressure of the water 5 inside the sleeve 4. On the spacer element 13 on the extractable part 9, a Binko tape 15 is attached with a length sufficient to be removed and pulled out of the well 2 to be removed parts 9. Binko tape 15 is made of polyethylene, has a width of 10-12 mm, a thickness of 0.6-0.7 mm, the surface of the tape on both sides has a rhombic embossing. The outer diameters of the spacer elements 13 and 14 in working condition take more than the diameter of the well 2 to ensure reliable fixation. The recoverable part 9 is pulled out of the well 2 after charging the well 2 with explosive 6. The length of the recoverable part 9 can be taken equal to the length of the stemming, the length of the unrecoverable part 10 can be taken equal to the length of the charge in the downhole 2.

The explosive charge for flooded wells is used as follows. In a rock mass 1 a downhole is drilled. 2 A downstream polymer sleeve with a hermetically sealed bottom end with a load of 12 at the end (for example, stone) is lowered into the downhole 2 immediately after removing the drill string (not shown conventionally). Then, a working agent — water 5 — is poured or pumped under pressure into the waterproof polymer sleeve 4 with a hermetically sealed lower end until a part of the waterproof polymer sleeve 4 with the hermetically sealed lower end located in the downhole 2 is filled. It is also possible to put on the waterproof polymer sleeve with hermetically sealed lower end with a load of 12 at the end to the water supply hose and the descent, followed by filling with water on the hose. Part of the waterproof polymer sleeve 4 with a hermetically sealed lower end that extends beyond the descending well 4 is cut off and disposed of. You can also put ties on the open end of the waterproof polymer sleeve 4 with a hermetically sealed lower end to prevent water 5 from flowing out of the inner space of the sleeve 4. When a working agent is supplied water, inside the waterproof polymer sleeve 4 with a hermetically sealed lower end, water 3 is displaced in the downward direction well 2, and due to a column of water in the well 2, a hydrostatic spacer is created to prevent the collapse and swimming of the well 2. Then continue the process of drilling the rest down boiling wells 2 in accordance with the explosion of the project. After drilling the required number of wells 2 with equipping them with waterproof polymer sleeves 4 with hermetically sealed lower ends according to the technology described above, they begin to charge them. To do this, a charging hose (not shown conventionally) is lowered into a waterproof polymer sleeve 4 with a hermetically sealed lower end and charged to the interior of the sleeve 4 with a waterproof explosive 6, having previously installed an action cartridge 8 mounted on the waveguide 7. The explosive 6 is charged in the direction from bottom to top under a column of water with the replacement and partial displacement of water 5 from the inner space of the sleeve. In some cases, it is possible to charge with a waterproof explosive on top of the sleeve, while the initiation should be done from a detonating cord, as the charge column of the waterproof explosive 6 may form water inclusions from the sleeve 4.

Instead of water, brine can be used as a working agent, as a heavier medium for more reliable temporary fastening of blast hole 2. In particularly difficult conditions, a heavier fluid can be used as a working agent, which creates increased hydrostatic pressure in the well 2 to prevent collapse and swimming. For the convenience of descent into the well 2, sleeve 4 can be folded with a longitudinal accordion and fastened with water-soluble screeds. Instead of a Binko tape, a rope attached to a spacer 13 of elastic wire fixed by soldering on a removable part 9 of a sleeve 4 can be used as a tear-off tool.

The use of this explosive charge for flooded wells provides the following advantages:

- the exclusion of collapse and swimming wells during loading due to temporary fastening;

- increase the safety of loading work.

Claims (4)

1. The explosive charge for waterlogged wells, including an explosive in a waterproof polymer sleeve with a hermetically sealed lower end, means of initiation and jamming of inert material placed in the well, characterized in that the sleeve consists of removable and non-removable parts separated by perforation, moreover, on both sides of the perforation, spacers made of elastic wire are fixed by brazing, means of tearing and extraction are attached to the spacer element on the extractable part with a length sufficient for tearing and pulling out the extracted part from the well from the surface, moreover, the diameter of the well and spacer elements is greater than the diameter of the sleeve, and the length of the unrecoverable part is taken equal to the length of the explosive charge. 2. The charge according to claim 1, characterized in that a rope is used as a means of extraction and separation. 3. The charge according to claim 1, characterized in that the sleeve is folded with a longitudinal accordion and fastened with water-soluble screeds. 4. The charge according to claim 1, characterized in that the length of the extracted part is taken equal to the length of the stem from inert material.

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