Device to intensify wells

 

The invention relates to the oil and gas industry, in particular to intensify well by restoring the perforation of the casing. The device includes a housing in the form of a hollow cylinder having a bottom with an airtight lid with safety lock configured to melt when applying an electric signal, a tank of fuel. Fuel tank made of insulated and is located in the upper part of the body. Fuel is on these biodegradable oxygen and water in the presence of catalytically active inorganic compounds and is under high pressure inert gas. System displacement includes a supply tube these biodegradable fuel in the well and a valve, controlled by the sequence diagram. Increase the efficiency and reliability of the device. 1 C.p. f-crystals, 1 Il.

The invention relates to the oil and gas industry, namely to intensify exploited well by restoring the perforation of the casing string.

Known devices for processing the wells containing the descent into the well on wireline hollow body in the form of a sealed tube with an inlet opening in the lower frequent the th area of the borehole, because at the moment of opening of the valve due to the pressure difference in the borehole and the casing, filling the borehole fluid, beckoning the sediment, which then together with the body rises to the top (No. 97116308/03 from 01.10.97, MKI 6 E 21 B 43/25, 43/18, Z. No. 98109375/03 from 15.05.98, MKI 6 E 21 B 43/25).

Widely used in the oil industry devices based on different gas generators that allow you to create inside the well in the zone of perforations excessive pressure substantially in excess of rock pressure, thereby cleaning the perforations and intensification of recoil oil.

Methods of generation of gas can be very different. In Z. No. 97118505/03 from 27.10.97, MKI 6 E 21 B4 3/25 used thermogenerator with the reaction material and the working fluid.

As the gas-generating substance used composite material, the combustion products which are mixed with the working fluid and generate gidrokabina in the perforations.

The most common gas generators are powder charges (C. No. 97113482/03 from 28.10.97, MKI 6 E 21 In 43/25, Z. No. 97118482/03 from 28.10.97, MKI 6 E 21 In 43/25, and.with. No. 407033 from 31.12.71, MKI E 21 In 43/11 and others).

In addition, in a number of ways and devices provides

Known solutions the closest to the technical nature of the claimed method is to intensify drilling wells and device for its implementation, Z. No. 97120168/03 from 05.12.97, MKI 6 E 21 B 3/25.

The method consists in placing the generator pressure in the well, the burning of combustible material and create within the borehole in the zone of perforations excess pressure substantially higher than the mountain, characterized in that the treatment area wells deliver water in the generator pressure produce electrolysis and ignite the mixture of hydrogen with oxygen, the treatment area wells seal above and below the perforations.

Pressure generator, realizarse the above-described method, includes a housing, fuel and a means of initiation. It is equipped with an electrolysis cell with a spring-loaded valve, made in the lower part of the body, two samakonasana congestion associated with cell flexible connections, and capacity for water .

Initiation means made in the form of surface systems, electrically connected with one side of the electrode of the cell, and with the generator housing, pressure.

The drawbacks are the tion is to improve the reliability and efficiency of the device.

This objective is achieved in that the device having a housing in the form of a hollow cylinder placed in it a tank with fuel system displacement and electrically operated cover, tank according to the invention is located in the upper part of the casing and insulated, airtight lid is located at the bottom and provided with a fusible lock. Fuel is on these biodegradable oxygen and water in the presence of catalytically active inorganic compounds and is under high pressure inert gas. System displacement includes a supply tube in the hole these biodegradable fuel chamber connected to the tank with fuel through the valve, controlled by the sequence diagram.

As these biodegradable fuel, it is advisable to use a highly concentrated (98%) hydrogen peroxide, stabilized with phosphoric acid in the amount of 0.03 kg per 1 m3highly concentrated hydrogen peroxide.

The invention is illustrated in the drawing, which shows the device in section, which consists of a housing 1 made in the form of a long hollow cylinder, closed bottom sealed by a cover 2 and is provided with a lock 3, which allows you to open the lid using auslagen fuel 5. Excessive pressure in the tank is created using inert gas 6. The fuel injection into the wells, the tube 7. The submission process is regulated by the solenoid 8.

The device operates as follows. Curb on the surface of the body 1 is delivered to the zone perforations of the well.

Excessive pressure in the tank is created with an inert gas 6, for example nitrogen.

Insulation protects the fuel tank from overheating, which can cause premature reaction of the decomposition.

The command to open the solenoid 8 and the fuel 5 begins the tube 7 to flow into the well.

Getting into Wednesday, wells, rich catalytically active inorganic compounds, the fuel begins to decompose. Forms a gas cushion with high pressure, which is beginning to replace the device up.

Then the command to close the solenoid and is prorokowanie accumulated gas up. Case settles sharply that in water-salt solution is well accompanied by a hammer.

Next working cycle is repeated.

The alternation of excess pressure and water hammer promotes effective cleaning perforations and ostase fuel moreover, its efficiency is higher, the more cycles. The solenoid operates in accordance with the management program.

After complete emptying of the tank is supplied with the electric signal, resulting in melting of the castle 3.

Cover 2 is opened by the difference in pressure in the borehole and the casing is filled with cleaning products, which, together with the device up.

As a fuel it is possible to use highly concentrated hydrogen peroxide (SVC), stabilized with phosphoric acid in the amount of 0.03 kg per 1 m3SVC. This substance in the presence of catalytically active inorganic compounds, such as permanganates, manganese dioxide, salts and oxides of iron and other intensive decomposes into oxygen and water.

Due to the inclination of the SVC to samorazrushenie, to the inner surface of the ball requirements of high purity surface, which is the best guarantee of stability of the SVC. The content of catalytically active impurities should not exceed a few mg / l.

The fuel itself and the products of its decomposition are organic substances, in addition, the decomposition products of the SVC are explosion-proof.

Formula izobretalem and displacement, characterized in that the housing has a sealed cover plate with safety lock configured to melt when applying an electric signal, a fuel tank made of insulated and is located in the upper part of the body, these biodegradable fuel is on oxygen and water in the presence of catalytically active inorganic compounds and is under high pressure inert gas, the system displacement includes a supply tube these biodegradable fuel in the well and a valve, controlled by the sequence diagram.

2. The device under item 1, characterized in that as these biodegradable fuel is used highly concentrated (98%) hydrogen peroxide, stabilized with phosphoric acid in the amount of 0.03 kg per 1 m3highly concentrated hydrogen peroxide.

 

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1 dwg

FIELD: oil and gas extractive industry.

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21
-d22
).(HT-Hgp-Hi-t).10-6, where d1 - inner diameter of casing column, mm; d2 - outer diameter of tubing pipes, mm; HT - depth of lowering tubing column in well, m; Hgp - height of gas pillow in inter-tubular space, m; Hgp=K·Pgp; K - hydrostatic coefficient of resistance to pushing of liquid and gas (K=100 m/MPa), m/MPa; Pgp - end pressure of gas pillow, MPa; Hi-t - inter-tubular space height.

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3 cl, 2 dwg, 2 ex, 1 tbl

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EFFECT: higher efficiency.

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FIELD: oil industry.

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2 ex

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2 cl, 1 dwg

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