RU137054U1 - DEVICE FOR PROTECTING A CUMULATIVE PUNCHER FROM AN UNAUTHORIZED INITIATION - Google Patents

Abstract

A device for protecting a cumulative perforator from unauthorized initiation, comprising a perforator body, a detonation cord, characterized in that it is provided with a body attached to the end part of the perforator body, a first booster with a detonating cord is placed in the upper part, the upper contact in the upper contact sleeve, in the lower cylindrical part a piston is connected to the housing, connected to a detonation assembly located in the middle cylindrical part of the housing, including a cup, an electric detonator, and a second detonating cord, second booster, lower contact in the lower contact sleeve, knock assembly is surrounded by a spring resting at one end on an end groove on the outside of the cup, and the other end on a stop nut attached to the inside of the upper cylindrical part of the housing, the lower end of the housing is closed by a plug , a hole is made in the plug connecting the space under the piston with external fluid.

Description

The utility model relates to the oil and gas industry and may find application in the implementation of perforation of wells.

The closest analogue is the Cumulative single-shot puncher containing a housing, a detonation cord (see, for example, the description of the invention to RF patent 2307235, IPC E21B 43/117 (2006.1), publication date 09/27/2007).

The disadvantage of the closest analogue is the lack of protection against unauthorized initiation.

The technical result is to provide protection against unauthorized initiation.

The essence of the technical solution is characterized by the fact that it contains a perforator body, detonation cord, and differs from the closest analogue in that it is equipped with a body attached to the end part of the perforator body, the first booster with a detonating cord is placed in the upper part of the body, the upper contact is in the upper contact sleeve, in the lower cylindrical part of the housing there is a piston connected to a detonation unit located in the middle cylindrical part of the housing, including a glass, an electric detonator, a second detonating cord, the second booster, the lower contact in the lower contact sleeve, the knock assembly is surrounded by a spring resting on one end of the groove on the outside of the cup, and the other end on the stop nut attached to the inner side of the upper cylindrical part of the housing, the lower end of the housing is closed by a plug, the plug has a hole connecting the space under the piston with an external fluid.

The essence of the utility model is illustrated by images, where:

FIG. 1 is a side view in section in a working position;

FIG. 2 is a side view in section in the initial position.

The device for protecting a cumulative perforator from unauthorized initiation comprises a perforator body 1, a detonation cord 4. It is provided with a body 5 attached to the end part of the perforator body 5. The first booster 3 is placed with a detonating cord 4, the upper contact 17 in the contact sleeve of the upper 14. In the lower cylindrical part of the housing 5 there is a piston 6 connected to a detonation assembly located in the middle cylindrical part of the housing. The knock assembly includes a cup 7, an electric detonator 8, a second detonating cord 9, a second booster 10, a lower contact 15 in the contact sleeve of a lower 16. A knock assembly is surrounded by a spring 11, resting one end on the end groove on the outside of the cup 7, and the other end on a nut -limiter 12, attached to the inner side of the upper cylindrical part of the housing 5. The lower end of the housing 5 is closed by a plug 2. In the plug 2 a hole 13 is made connecting the space under the piston 6 with external fluid (Fig. 1, 2).

The device to protect the cumulative punch from unauthorized initiation is as follows.

In the initial position on the surface of the earth and in the initial period of lowering the cumulative perforator with a device for protecting the cumulative perforator from unauthorized initiation into the well, the piston 6 is in the lower position under the influence of the spring 11 (Fig. 2). The presence of a spring 11 acting with a predetermined force on the piston 6 ensures that the electric circuit is not closed through open contacts 15 and 17. After lowering the cumulative perforator to a predetermined depth with the calculated borehole pressure, the piston 6 moves upward under the influence of the borehole pressure on its end surface. overcoming the resistance of the spring 11, to the closure of the contacts 15 and 17 (Fig. 1). The electric detonation circuit of the perforator becomes closed and ready to supply an electrical impulse. The first booster 3 and the second booster 10 are at a distance from each other sufficient to transmit detonation.

When an electric pulse is applied, the entire detonation circuit of the cumulative punch is triggered, starting with the operation of the electric detonator 8, along the second detonating cord 9 through the second booster 10 and the first booster 3 along the detonating cord 4 to the cumulative charges of the punch.

Tests have shown high reliability of protection against unauthorized initiation.

Claims (1)

A device for protecting a cumulative perforator from unauthorized initiation, comprising a perforator body, a detonation cord, characterized in that it is provided with a body attached to the end part of the perforator body, a first booster with a detonating cord is placed in the upper part, the upper contact in the upper contact sleeve, in the lower cylindrical part a piston is connected to the housing, connected to a detonation assembly located in the middle cylindrical part of the housing, including a cup, an electric detonator, and a second detonating cord, second booster, lower contact in the lower contact sleeve, knock assembly is surrounded by a spring resting at one end on an end groove on the outside of the cup, and the other end on a stop nut attached to the inside of the upper cylindrical part of the housing, the lower end of the housing is closed by a plug , a hole is made in the plug connecting the space under the piston with external fluid.

Images