SU1257170A1 - Arrangement for thermoreagent hole treatment - Google Patents

Description

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The invention relates to the mining industry, in particular, to the development of mineral deposits by the method of underground leaching, and specifically to devices for thermoreagent treatment of process wells, and can be used to restore the productivity of wells for water.

The aim of the invention is to increase the processing efficiency by increasing the heating time of the reagent. Figure 1 shows the proposed. The device for thermoreagent well treatment, general view; 2 - its position in the filter is squed.

. The device comprises top-down and fastened to each other. another primer 1, intermediate 2 and buffer 3 tanks. A cable 4, a pipeline 5 for supplying the reagent and a pipeline 6 for supplying compressed air are connected to the upper part of the filling tank 1. The pipeline 5 is equipped with a shut-off valve 7, and the pipeline with a 6-gauge 8 and a three-way valve 9. On the side surface of the filling tank 1 is a set of rubber cuffs 10 that fit in relation to the inner surface of the well 11 with some mounting clearance 12.

The lower part of the tank 1 of the tank is made in the form of a conical sedpa 13, and in the internal cavity of the tank 1 of the tank, a locking body with a ball 14 is placed with positive buoyancy.

The lower part of the intermediate tank 2 is made in the form of an annular seat 15.

In the lower part of the intermediate tank, there is a valve for communication of the priming tank with the well, made in the form of a tapered-threaded rod 16, a sealing gasket 17 and a tightening nut i8. In the buffer tank, a bottom 19 with openings 20 is installed. With the help of a spring 21 supported on bottom 20, the valve () is tightly pressed against. an annular saddle 15. Buffer 3 capacity with its lower section is open into the cavity of the filter 22 wells 11. To install the device in the well at the right level is the cable 4. The housing is filled with a thermal reagent, the volume of which

five

0 5 0

j

0

five

five

70 2

sufficient for

exothermic reaction in the well.

The device works as follows.

A calculated amount of the hydrazine hydrochloric acid solution is pumped into the cavity of the filter 22. Using the cable 4, the device is lowered into the well 11 so that the lower section of the buffer tank, opened into the cavity of the filter 22, is located within the lower part of the filter. Next, open the shut-off valve 7 of the pipeline 5, and using a three-way valve 9 inform the pipeline 6 and priming i, the tank with the atmosphere. Through the open T1s1i valve 7, through the pipeline 5, hydrogen peroxide solution is supplied to the priming tank 1, while the air from the filler is vented through pipeline 6 and the three-way valve 9 to the atmosphere.

After filling the filling tank 1, the valve 7 is closed, and with the help of a three-way valve 9, the pipeline 6 and the filling tank 1 are connected with a source of compressed air. Compressed air injects hydrogen peroxide solution from the filling tank 1, with this valve (16-18), overcoming the force of the spring 21, moves away from the ring seat 15 and allows the hydrogen peroxide solution to flow from the intermediate tank 2 into the buffer 3 tank and then through the open the cross section of the buffer tank is into the cavity of the filter 22. Starting with the appearance of hydrogen peroxide in a solution of hydrazine hydrochloride, an exothermic reaction will lead to a convective movement of the heated solution upwards, and a set of rubber cuffs 10 will become a choke on the way th movement. At the same time, the heated solution of the hydrochloric acid hydrazine is pushed into the kolmatised inflow zone due to the liberated gaseous nitrogen.

When choosing the mode of operation of the device, it should be assumed that the pressure of compressed air should be sufficient to overcome the hydrostatic pressure in the well filter.

As the hydrogen peroxide solution is squeezed out of the filling i tank, its level drops, and finally the ball valve 14 is sealed ca31257

At this moment, the needle of the pressure gauge 8 will show a pressure jump, after which the compressed air supply is stopped and the valve 16-18 under the action of the spring 21 again s sits on the annular seat 15. The remaining peroxide solution within the buffer 3 hydrogen does not allow the reaction products to penetrate into the intermediate 2 capacity and Yu further upwards.

After a complete drawdown of the solution of hydrogen peroxide that came in on 704

The flattery of the filter 22, in the priming pot 1 in accordance with the above order, this reagent can be fed again. If necessary, in order to intensify the process of dissolving the colmatant, in the same way, an additional amount of hydrochloric acid hydrazine solution can be fed and further thermoreagent treatment can be continued. wells by subsequent supply of hydrogen peroxide solution.

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Editor N.Slobod nickname

Phie.g

Compiler And, Cap

Tehred M. Khodanich Proofreader A.Obruchar

four

Order 4888/24 Circulation 548. Subscription

. VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (1)

DEVICE FOR THERMAL REAGENT TREATMENT OF A WELL, including a filling tank with valves for supplying a thermal reagent and compressed air and a seat in the lower part, a shut-off element installed in the filling tank with the ability to fit into the saddle when compressed air is supplied to the body, and a valve installed under the saddle for communicating the cavity of the pouring tank with the well, characterized in that, in order to increase the processing efficiency by increasing the heating time of the reagent, it is supplied sequentially Formation and connected to the lower part of the drilling vessel, respectively, and an intermediate buffer tank, the valve for communication with the well drilling vessel installed at the bottom of the intermediate container and set in the 'sealing the container locking member is a ball buoyancy.