RU2307237C2 - Device and device member for shaped-charge perforator detonation transfer - Google Patents

Abstract

FIELD: oil production, particularly gun or shaped-charge perforators, namely ignition systems.

SUBSTANCE: device comprises adapter, bush inserted in inner orifice of the adapter, booster and detonating cord connected to booster by the first end thereof. The booster is arranged inside bush. Bush is made as disc and cylindrical part provided with axial orifice. Annular beads are formed on outer side of cylindrical bush part. Fractional longitudinal cut is made from one end of cylindrical bush part. The bush includes cylindrical part with axial orifice, disc arranged on outer side of cylindrical part, as well as annular beads connected to outer cylindrical part surface and fractional longitudinal cut made in cylindrical part and extending from one bush end.

EFFECT: increased reliability of device actuation.

4 cl, 5 dwg

Description

The invention relates to a device for transmitting detonation of cumulative perforators.

Known devices for transmitting detonation of cumulative perforators (see, for example, the description of the invention to patent RU 2215127, ЕВВ 43/117, 10/27/2003; description of the utility model for patent RU 43034, ЕВВ 43/117, 12/27/2004). The disadvantage of these devices perforators is not reliable enough, due to the design and implementation of the knock transmission units.

The closest analogue is a detonation transmission device for a casing downhole cumulative perforator (see, for example, the utility model description to patent RU 43034, ЕВВ 43/117, December 27, 2004), containing an adapter, a sleeve located in the adapter’s inner hole, a booster, a detonation cord, the end of which is attached to the booster.

The disadvantage of the detonation transmission device of the casing downhole cumulative perforator is the insufficiently high reliability of knock transmission due to a possible change in the gap between adjacent metal linings, in particular due to insufficient fixation of the position of the booster sleeve in it.

The objective of the invention is to obtain a highly reliable device for transmitting detonation of a cumulative perforator.

The technical result is expressed in increasing the reliability of operation of the device for transmitting detonation of a cumulative perforator.

The essence of the device for transmitting detonation of a cumulative punch is characterized by a combination of essential features common with the closest analogue:

an adapter, a sleeve located in the inner hole of the adapter, a booster, a detonation cord, the end of which is connected to the booster,

and different from the closest analogue:

the booster is placed in the sleeve, made in the form of a disk and a cylindrical part with an axial hole, annular beads located on the outside of the cylindrical part of the sleeve, and a partial longitudinal section of the cylindrical part of the sleeve from one end.

The essence of the node of the device for transmitting detonation of a cumulative perforator - sleeve is characterized by a combination of essential features common with the closest analogue:

a cylindrical part with an axial hole, a disk located on the outside of the cylindrical part,

and different from the closest analogue:

annular flanges located on the outside of the cylindrical part of the sleeve, and a partial longitudinal section of the cylindrical part of the sleeve from one end.

The essence of the detonation transmission device of the cumulative perforator and its node - the sleeve is illustrated by drawings, where

figure 1 shows a view of a detonation transmission device in longitudinal section with an adapter for connecting two adjacent perforator bodies;

figure 2 shows a view of a perforator in longitudinal section with an adapter for connecting a perforator with a mechanical explosive head;

figure 3 shows a view of a detonation transmission device in longitudinal section with an adapter for connecting a hammer with a cable;

figure 4 shows a view of the node of the knock transmission device - the sleeve in longitudinal section with a ring located on the edge of the cylindrical part of the sleeve;

figure 5 shows a view of the knot transmission device of the detonation of the sleeve in longitudinal section with a ring located in the middle of the cylindrical part of the sleeve.

The detonation transmission device includes an adapter 5 connected to the housing of the cumulative perforator 2, a detonation cord 7 connected to the booster 3. The booster 3 is placed in the sleeve 1 (figure 1). The adapter 5 has a longitudinal axis through the inner hole with a cylindrical groove for accommodating the sleeve 1 and the detonation cord 7. The sleeve 1 is made in the form of a disk 9 and a cylindrical part 8 with an axial hole 13 (Figs. 4, 5). On the outer side of the cylindrical part 8 of the sleeve 1 are annular beads 10 (Fig.4, 5). The sleeve is provided with a partial longitudinal section 11 of the cylindrical part of the sleeve at one end. A cylindrical groove in the through hole of the adapter 5 corresponds to the size of the disk 9 of the sleeve 1. The sleeve 1 is placed in the inner hole of the adapter 5 from the side of the cylindrical groove (Figs. 1, 2, 3, 4, 5).

In one embodiment of the sleeve 1, the disk 9 is located on the edge of the cylindrical part 8 of the sleeve 1, and a partial longitudinal section 11 in the cylindrical part 8 of the sleeve 1 is made from the end opposite from the disk 9 (Fig. 4). In any of the above embodiments of the sleeve 1, the annular flanges 10 located above a partial longitudinal section 11 of the cylindrical part 8 of the sleeve 1, can be made in the form of half rings with a gap between their ends equal to the width of the partial longitudinal section 11 of the cylindrical part 8 of the sleeve 1. Sleeve 1 can be made of rubber.

In the first embodiment of the device for transmitting detonation when connecting two adjacent bodies 2 of a cumulative perforator, the outer sides of the adapter 5 have threaded parts and parts for accommodating the sealing rings 12 (Fig. 1). The threaded parts of the adapter 5 are screwed into the end parts of the housings 2. At the same time, a bracket 6 is located between the end ends of the adapter 5 and the housing 2, which fixes the frame 17 with cumulative charges placed inside it inside the housing 2 of the cumulative perforator. Fixing is carried out using the pins 4 located in the bracket 6, and pressing the end of the adapter 5 screwed into the housing 2 (Figs. 1, 2, 3).

In the second embodiment of the device for transmitting detonation when connecting the body 2 of the cumulative perforator with a mechanical blasting head (not shown conventionally in figure 2), one outer side of the adapter 5 has a threaded part and a part for accommodating the sealing rings 12 for connection with the body 2 of the cumulative perforator and the other external part is made in the form, providing the connection of a mechanical explosive head and corresponding to that part of the head that is attached to the adapter 5 (figure 2).

In the third embodiment of the device for transmitting detonation when connecting the housing 2 of the cumulative punch with an armored electric cable to form an electrical circuit between the conductive core cable and the electric detonator 16, one outer side of the adapter 5 has a threaded part and a part for accommodating the sealing rings 12 for connection with the housing 2 of the cumulative perforator, and the other outer part is made in the form, providing connection to the armored electric cable (figure 3). At the same time, in the hole of the adapter 5 there is a contact rod of the electric input 14, an electric wire 15, an electric detonator 16, a sleeve 1 with a booster 3. In this embodiment, the disk 9 of the sleeve 1 is located in the middle of the cylindrical part of the sleeve 1, in which the booster 3 is placed. One part of the sleeve 1 is located in the adapter 5, and the other part is located in the bracket 6 (figure 3).

The detonating cord 7 serves to transmit detonation from the electric detonator 16 or from a mechanical blasting head (not shown conventionally in FIG. 2) to the cumulative charges of the perforator. When connecting several buildings 2 at the ends of the detonating cord 7, boosters 3 are installed to ensure the preservation of the detonation chain. When lowering the punch on the cable (not shown conditionally in figure 3), adapter 5 is designed to undermine the detonation cord 7. When lowering the punch on an armored cable using a cable head, the electrical circuit in the punch attached to the cable is formed by a conductive core cable, contact pin 14 electric input, electric wire 15, electric detonator 16, body 2 of the perforator and armor of the cable.

The connection of the adapter 5 with a mechanical blasting head is performed during the descent into the well of a cumulative perforator on the tubing.

The operation of the device for transmitting detonation of a cumulative perforator is carried out in the following order. After the descent into the well and the installation of the perforator at a predetermined depth, an electric impulse is supplied during descent on the cable, and during descent on the tubing, the rod is lowered into the well, which triggers the mechanical blasting head. In both cases, detonation circuit and perforator charges are triggered. The cumulative jets formed during the explosion of cumulative charges pierce the casing 2, the liquid layer in the well, the casing, the cement layer and deep channels in the rock, providing communication between the formation and the well.

After shooting, the perforator is removed from the well. The adapter 5 can be used repeatedly, the remaining parts of the device for detonation transmission of a single use.

The trouble-free and trouble-free operation of the claimed device for transmitting detonation of a cumulative disposable perforator is provided both by the design as a whole and by the implementation of its individual units.

In particular, the design of the sleeve 1, which allows the use of various types of boosters 3 (with different diameters), which ensures reliable fastening of the booster 3 and detonating cord 7 in the adapter 5 while maintaining the specified clearance between the boosters 3 of the adjacent bushings 1 due to the presence of the disk 1 and ring beads 10. The presence in the cylindrical part 8 of the sleeve 10 of a partial longitudinal section 11 provides a more accurate positioning of the booster 3 in the sleeve 1 when it is placed in it. After placing the booster 3 and detonation cord 7 in the sleeve 1, the subsequent placement of the sleeve 1 in the inner hole of the adapter 5 results in a dense compression of the detonation cord 1. The presence of ring beads 10 on the cylindrical part 8 of the sleeve 5 provides a more accurate location of the sleeve 1 relative to the adapter 5 and tight compression detonation cord 7.

At the same time, simplification of pairing of booster pairs 3 is achieved, which allows to reduce the number of mates in the cumulative perforator, improve the reliability of detonation transmission, and reduce the number of structural elements.

Claims (4)

1. The device for transmitting detonation of a cumulative punch, containing an adapter, a sleeve located in the inner hole of the adapter, a booster, a detonation cord, the end of which is connected to the booster, characterized in that the booster is placed in a sleeve made in the form of a disk and a cylindrical part with an axial hole, annular flanges located on the outer side of the cylindrical part of the sleeve, and a partial longitudinal section of the cylindrical part of the sleeve from one end. 2. The sleeve of the device for transmitting detonation of a cumulative punch, containing a cylindrical part with an axial hole, a disk located on the outside of the cylindrical part, characterized in that it is provided with annular beads located on the outside of the cylindrical part of the sleeve, and a partial longitudinal section of the cylindrical part of the sleeve with one end. 3. The sleeve according to claim 2, characterized in that the disk is located on the edge of the cylindrical part of the sleeve, and a partial longitudinal section in the cylindrical part of the sleeve is made from the end opposite from the disk. 4. A sleeve according to any one of paragraphs.2 and 3, characterized in that the annular flanges located above a partial longitudinal section of the cylindrical part of the sleeve are made in the form of half rings with a gap between their ends equal to the width of the cut of the cylindrical part of the sleeve.

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