RU190090U1 - A DEVICE FOR THE EXCITATION OF DETONATION IN NON-TERMINAL PRODUCTS OF SPACE-EXPLOSIVE EQUIPMENT - Google Patents

Abstract

The utility model relates to detonating devices, in particular, to electric-effect detonators for performing perforating operations in a well at a temperature of 165-200 °. Specifically, this hermetic electric detonator can work in the well fluid at high temperatures and pressures. The task of creating a useful model: ensuring the tightness of the device. The solution of this problem is achieved in a device for initiating detonation in leaky products with a space-explosive apparatus, comprising a housing having a cylindrical surface on which two annular grooves are made in the upper and lower parts for attaching rubber conical cuffs that ensure the tightness of the electric detonator and the detonating cord fastening, having a central channel, on the side surface of which a roughness zone is applied, the lower end of the channel has a discontinuous partition, in the central the main channel is filled with the main charge of the blasting substance, a washer with a central hole is installed on top, which has a conical channel in the direction of the main charge, the upper end of the washer is covered with aluminum foil on which the heat-resistant igniter is poured, the electrical input with a bridge is installed in the slot above the central channel made of composite material, a cap, a sealing gasket, a steel washer and an upper conical rubber cuff, in which a central contact is pre-installed, are installed on top, which installation includes a projecting portion of the center electrode, and which is mounted in the upper annular groove of the housing. The central electrical input can be made in a stepped form and contains a thickened part, in its lower part there is a dead-end axial hole, the protruding part of the central electrode, which has a longitudinal slot in the upper part, enters the bottom-end axial hole. The main charge may consist of two charges: the first, pressed into the bursting wall, and the second, located above it. The weight of the first part of the main charge of the blasting explosive may be 0.45 ± 0.2 g, and it is pressed to a density of 1.3-1.5 g / cm. The weight of the second part of the main charge of the blasting explosive may be 0.35 ± 0.2 g, and it is compacted so that the height of the product is approximately 0.5 mm below the upper edge of the center channel. The cover may have a locking device. 5 hp f-ly, 7il.

Description

The utility model relates to detonating devices, in particular, to electric action detonators for drilling and blasting operations in a well at a temperature of 165-200 °. Specifically, this hermetic electric detonator can work in the well fluid at high temperatures and pressures.

This device is intended for the initiation of detonation in packageless perfusion systems and in other untight devices with shooting-explosive equipment (PVA).

Known electric detonator according to the patent of the Russian Federation for invention No. 2315027, IPC F42C 19/12, publ. 01.20.2008

This heat-resistant electric detonator consists of a tube containing an explosive-filled cap, and an electric igniter, which is fixed in the tube by crimping it. The electric igniter is made of an igniter composition containing potassium perchlorate, potassium picrate, polyphenylsiloxane resin and polybutyl methacrylate resin.

Disadvantages: there are no additional measures for sealing charges and means of strengthening the detonation impulse.

Known electric detonator according to the patent of the Russian Federation for invention No. 2150671, IPC F42C 19/12, publ. 06/10/2000

This invention relates to the field of ammunition, blasting, namely to bridge detonators, for example, to electric detonators, safe due to the absence in their composition of the initiating explosive. An amplifying charge and an initiator are placed in the electrodetonator sleeve, in which there is a cap with a part of the secondary explosive substance near the bridge of incandescence. Another part of the secondary explosive is enclosed in a thin-walled sleeve of the initiator, behind the bottom of which there is a washer with a central hole.

Disadvantages: there are no additional measures for sealing charges, the presence of electrical wires to supply electricity to the bridge glow.

Known electric detonator according to the patent of the Russian Federation for invention No. 2046276, IPC F42B 3/12, publ. 10.20.1995

This electric detonator contains an electric igniter placed in the housing, a low-density secondary explosive charge installed in the sleeve, and a secondary high-explosive charge of the secondary density, additional sleeves with a low-density explosive are introduced, directed axially one after the other in the direction of side of high density explosive. Disadvantages:

- a long channel in the body, in which a blasting explosive of various density is pressed into several stages,

- the presence of several nozzles, which complicates the design,

- the assembly process is complicated and a sophisticated technological tool is required,

- there are no measures to ensure the sealing of the internal cavity with the blasting explosive, especially at high pressure and temperature,

- the presence of current-carrying wires, leading to EMF and unauthorized tripping,

- the need for pulling the wire through the entire perforation system.

Known safe electric detonator for RF patent for the invention №2628360, IPC F42C 19/00, publ. 08/16/2017, the prototype.

This safe electric detonator for a space-explosive apparatus contains an electrical input installed in the socket, consisting of two contacts connected at the end with a bridge of incandescence, a cylindrical body, starting and main charges and a through axial channel, the through axial channel being three-stage and containing the first part of the channel relatively small diameter and the second part of the channel of relatively large diameter, connected by a conical section, the through axial channel is filled with the main charge of a high explosive about a substance of low density, and with both sides closed with adhesive tape, at one end of the case there is a thread mounted and fixed with heat-resistant glue, having a cylindrical slot with an axial hole, electrical input contacts made in the form of central and external contacts separated by a dielectric sleeve, cavity cavity filled with starting charge of blasting explosive; on the other end of the case, a second cover is installed along the thread and fixed with heat-resistant glue; it is in contact with the sticky metallized tape.

Disadvantages of this device:

- low tightness at high pressure and temperature,

- the complexity of the design due to the large number of parts.

The task of creating a utility model: ensuring the efficiency of the electric detonator under conditions of high pressure and temperature, directly in the well.

Achieved technical result: ensuring tightness using structural elements that allow you to maintain the integrity of the structure, tightness and performance at high pressures and high temperature borehole fluid.

The solution of this problem is achieved in a device for initiating detonation in leaky products with a space-explosive apparatus, comprising a housing having a cylindrical surface on which two annular grooves are made in the upper and lower parts for attaching rubber conical cuffs that ensure the tightness of the electric detonator and the detonating cord fastening, having a central channel, on the side surface of which a roughness zone is applied, the lower end of the channel has a discontinuous partition, in the central The first channel is filled with the main charge of the blasting substance, a washer is installed on top with a central hole, which has a conical channel in the direction of the main charge, the upper end of the washer is covered with aluminum foil, on which the heat-resistant igniter is poured, the electrical input from the central channel is installed a bridge made of composite material; a cap, a sealing gasket, a steel washer and an upper conical rubber cuff, in which a central contact is pre-installed, are installed on top; which when installed includes a protruding part of the central electrode, and which is mounted in the upper annular groove of the housing.

The central electrical input can be made in a stepped form and contains a thickened part, in its lower part there is a dead-end axial hole, the protruding part of the central electrode, which has a longitudinal slot in the upper part, enters the bottom-end axial hole.

The main charge may consist of two charges: the first, pressed into the bursting wall, and the second, located above it.

The weight of the first part of the main charge of the blasting explosive may be 0.45 ± 0.2 g, and it is pressed to a density of 1.3-1.5 g / cm ³ .

The weight of the second part of the main charge of the blasting explosive may be 0.35 ± 0.2 g, and it is compacted so that the height of the product is approximately 0.5 mm below the upper edge of the center channel.

The cover may have a locking device.

The essence of the utility model is illustrated in the drawings of FIG. 1 ... 7, where:

- in fig. 1 shows the design of a sealed electric detonator,

- in fig. 2 shows the puck

- in fig. 3 shows the electrical input,

- in fig. 4 shows the assembly of the Central contact electrical input,

- in fig. 5 shows the upper conical rubber cuff,

- in fig. 6 shows the lower conical rubber cuff,

- in fig. 7 shows the construction of fastening LH to the end of the detonator using a conical rubber cuff.

Designations adopted in the description:

building 1,

cylindrical surface 2,

the upper annular groove 3,

lower annular groove 4,

upper conical rubber cuff 5.

lower conical rubber cuff 6,

central channel 7,

roughness zone 8,

bottom end 9,

A rupture wall 10,

main charge 11,

first part 12,

second part 13,

top edge 14,

nest 15,

washer 16,

central hole 17,

tapered hole 18,

upper end surface 19,

aluminum foil 20,

heat-resistant igniter composition 21,

electrical input 22,

central electrode 23,

outer electrode 24,

insulator 25,

bridge 26,

lid 27,

the locking device 28,

Paronite sealing gasket 29,

steel washer 30,

central pin 31,

radial through hole 32,

geophysical cable 33,

thickened part 34,

dead-end axial bore 35,

longitudinal slot 36,

cuff body 37,

conical part 38,

central through hole 39,

a cavity of relatively large diameter 40,

a cavity of relatively small diameter 41,

inner annular protrusion 42,

detonation cord (LH) 43.

A device for initiating detonation in open-hole perforators and other PVA elements (Fig. 1) includes a housing 1 having a cylindrical surface 2 with two annular grooves: upper 3 and lower 4, for attaching conical rubber cuffs: upper 5 and lower 6 (FIG. 5-6).

Inside the housing 1 there passes a central channel 7 with a diameter of 5-5.5 mm, the side surface of this channel has a roughness zone 8, the height of the roughness protrusions is 0.3-0.5 mm. This is optimal for creating compression shocks in a supersonic flow. With smaller roughness heights, no shock waves are created, as it is within the boundary layer, and with greater heights shock waves occur due to turbulence and, for a short time, the central channel 7 overlaps by more than 20% of the cross-sectional area; dissolve and there are some more shocks.

The lower end 9 of the housing 1 near the central channel 7 has a rupture wall 10. In the central channel 7, the main charge 11 of the blasting explosive BVV is placed. The main charge 11 consists of two parts: the first part 12 of the main charge 11, pressed into the bursting wall 10, the second part 13 is located above the first part 12.

The weight of the first part 12 is 0.45 ± 0.2 g, it is pressed to a density of 1.3-1.5 g / cm3. Above is laid the second part 13 of the main charge 11 of the blasting explosive. Its weight is 0.35 ± 0.2 g. The second part 13 of the main charge 11 is compacted so that the height of the product is below the upper edge 14 of the central channel 7 relative to the housing 1, about 0.5 mm so that there is no pinching of the product when assembly of the detonator. The ratio of the weights and charge density provides the most effective excitation of detonation and the transition to the stationary mode of detonation. The reliability of operation is 100%.

Above the central channel 7 there is a slot 15 in the form of a cylindrical cavity with a diameter greater than the central channel 7.

In the slot 15 are sequentially installed elements of the primary excitation. The elements of the primary excitation include: washer 16 with a central hole 17 (Fig. 2) with a diameter of 1.5-1.8 mm, which has a tapered hole 18 at the end, which is directed by the expanding part towards the second part 13 of the main charge 11. At the top the end surface 19 of the washer 16 glue the aluminum foil 20, then heat-resistant igniter composition 21 with a mass of 0.13 ± 0.02 g fall asleep. Electrovod 22 assembled is sent to the slot 15 (Fig. 3).

The electrical input 22 includes a central electrode 23, an external electrode 24 mounted concentrically to it and an insulator 25 between them. In the lower part, the central and external electrodes 23 and 24 are connected by a bridge 26. Bridge 26 is made of a composite material.

Then cover the electrical input 22 with a cover 27 with a locking device 28, which does not allow unauthorized disassembly of the detonator. After that, the cover 27 together with the electrical input 22 is sent to the housing 1 until it stops. Then a sealing gasket from paronite 29 and a steel washer 30 are installed. After that, an upper conical rubber cuff 5 is installed, into which the central contact 31 is pre-installed, the geophysical cable 33 is attached to the radial through hole 32. The central contact 31 is stepped and contains thickened part 34, in its lower part there is a dead-end axial hole 35.

From below, the projecting part of the electrical input 22 enters the dead-end axial hole 35. The projecting part of the electric input 22 has a longitudinal slot 36 in the upper part. In the initial state, the end of the projecting part 26 is spaced h from the steel plate 40 (Fig. 4).

The upper conical rubber cuff 5 is mounted in the upper annular groove 3 on the housing 1.

FIG. 5 shows the upper conical rubber cuff 5, and FIG. 6 — lower conical rubber cuff 6. Both conical rubber cuffs 5 and 6 comprise a sleeve body 37, a conical part 38, a central through hole 39, a relatively large diameter cavity 40, a relatively small diameter cavity 41 (only for the upper conical cuff 5) and an internal an annular protrusion 42, designed for fixing the lower conical rubber cuff 6 on the housing 1.

Bottom of the housing 1 is attached detonation cord 43 (Fig. 7).

Detonation cord 43, pre-installed in the lower conical rubber cuff 6, then it is mounted with an inner annular ledge 42 on the lower annular groove 4. The detonation cord 43 rests firmly on the lower end 9 of the housing 1.

The central contact 31 in the lower part has a thickened part 34 (Fig. 1) with a dead-end axial hole 35, which includes the central electrode 23 of the electrical input 22, therefore when exposed to high pressure, the central electrode 23 can move freely in the dead-end axial hole 35. This is facilitated by the longitudinal slot 36. At the same time, the impact on bridge 26 will be minimal, which will not damage the performance of the detonator.

Device operation

The central wire of the geophysical cable 33 (Fig. 1) is inserted into the radial-through hole 32 of the central contact 31, the second end of the geophysical cable 33 is connected to the blasting machine on the surface (the explosion is not shown). A detonation cord 43 (FIG. 7) is connected to a perfusion system (not shown). Perfosystem lowered into the well to the required depth.

When a signal from a blast is applied, a bridge 26 made of a composite material is triggered, then the heat-resistant igniter composition 21 is ignited, high-temperature gases appear through the central hole 17 of the washer 16 and further into the central channel 7. The micropores of the low-density BVV of the second part 13 of the main charge 11 are compressed, There are so-called "hot spots" that ignite the low-density BVV of the second part of the main charge, high-speed combustion develops, which is enhanced by Strokes seal and enters the stationary detonation regime occurs gap discontinuous baffles 10. The detonating pulse is transferred LH 43 (FIG. 7) and then the other elements of PVA.

The main task in the development of this device design was to ensure the integrity and integrity of the design of the elements of the electric detonator. The impact on the central contact 31, at a pressure of 80 MPa (800) kg / cm ² , with a diameter of 4 mm is about 76-80 kg. Such an impact may disrupt the integrity of the bridge 26 of a composite material. Therefore, this problem was constructively solved as follows. The central contact 31 in the lower part has a thickened part 34 with a dead-end axial hole 35, which includes the central electrode 23 of the electric input 22, therefore, when pressure is applied to the central electrode 23, it can move freely in the dead-end axial hole 35 and the force effect on the bridge 26 will be minimal, that does not violate the performance of the detonator, the central contact 31 rests on the steel washer 30, which eliminates the possibility of forcing the sealing gasket from the paronite 29.

The main tightness of the device is provided by the upper conical rubber cuff 5. The higher the ambient pressure, the tighter the upper conical rubber cuff seals the electrical input 22. Operating experience of such a conical rubber cuff in other PVA devices has shown the reliability of sealing.

The use of the utility model allowed:

- to ensure complete tightness of the device at a temperature of from 165 to 200 ° C and pressure up to 80-100 MPa, through the use of conical rubber cuffs - and, as a result, to ensure reliable operation of the electric detonator,

- to ensure the safety of work due to the exclusion of the possibility of unauthorized triggering of the perfusion system from electric current pick-up from static electricity and electromagnetic radiation due to the absence of wires in the device.

Claims (6)

1. A device for initiating detonation in untight products of a space-explosive apparatus, comprising a housing having a cylindrical surface on which two annular grooves are made in the upper and lower parts for attaching rubber conical cuffs that ensure the tightness of the electric detonator and the detonating cord fastening having a central channel , on the side surface of which a roughness zone is applied, the lower end of the channel has a discontinuous partition, the main charge of bri is poured into the central channel zantnogo substance, installed on top of the washer with a central hole, which in the direction of the main charge has a conical channel, the upper end of the washer covered with aluminum foil, which is poured heat-resistant igniter composition, in the socket, made above the central channel, installed electrical bridge with a bridge of composite material, on top a cover, a sealing gasket, a steel washer and an upper conical rubber cuff, in which a central contact is pre-installed, which includes a protrusion during installation, are installed The main part of the central electrical input and which is mounted in the upper annular groove of the housing. 2. The device according to claim 1, characterized in that the central electrical input is made in a stepped form and contains a thickened part, in its lower part there is a dead-end axial hole, the protruding part of the central electrode, which has a longitudinal slot in the upper part, enters the bottom. 3. The device according to p. 1 or 2, characterized in that the main charge consists of two charges: the first, pressed into a discontinuous partition, and the second, located above it. 4. The device according to claim 1 or 2, characterized in that the weight of the first part of the main charge of the high explosive is 0.45 ± 0.2 g, and it is pressed to a density of 1.3-1.5 g / cm ³ . 5. The device according to claim 1 or 2, characterized in that the weight of the second part of the main charge of the blasting explosive is 0.35 ± 0.2 g, and it is compacted so that the height of the product is below the upper edge of the central channel relative to the body by about 0.5 mm. 6. The device according to p. 1 or 2, characterized in that the cover is made with a locking device.

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