RU2566531C1 - Method of delivery of explosive devices by plant of horizontal directional drilling - Google Patents

Abstract

FIELD: blasting operations.

SUBSTANCE: explosive device is delivered under the object to be exploded by the plant of horizontal directional drilling (HDD) through the drilled hole. The delivery method of the explosive devices by the plant of horizontal directional drilling comprises the construction of horizontal directional well under the object to be exploded and drilling operations from behind the safe shelter. Delivery of the explosive device under the object to be exploded is carried out by using a drill string consisting of drill pipes, an expander, a string disconnector and a swivel.

EFFECT: increased protection of the crew.

3 dwg

Description

The invention relates to the field of combating terrorism and can be used to selectively undermine buildings, fortified structures and communications in an urban environment with maximum protection for the personnel of the explosive team. In this case, the explosive device is delivered under the exploded object by the installation of horizontal directional drilling (HDD) through a drilled well.

Known methods for the delivery of explosives (explosive devices) into a drilled hole for perforation - an operation carried out in a well using special firing apparatus (perforators) to create holes in the casing for communication between the well and the reservoir. For these purposes, bullet and cumulative perforators are used, delivered to the perforation site using a logging cable [1] (http://www.allbest.ru/. Kazan (Volga Region) Federal University, Department of Geology, Department of Oil and Gas Geology. Types of well perforation . 2011).

A common disadvantage of the above methods for the delivery of explosives (explosive devices) into the well is the inability to use them for the purposes stated in this invention.

The aim of the present invention is to provide a method for the delivery of explosive devices using the installation of HDD, providing:

- safe conduct of drilling and demolition of buildings, fortified structures and communications in urban conditions with maximum protection of the personnel of the explosive team;

- high accuracy of delivery of explosive devices under the building, fortified structure or communications.

The essence of the present invention lies in the fact that the inventive method of delivering explosive devices using a horizontal directional drilling rig, which includes the construction of a horizontal directional well under an explosive object, according to the invention further offers drilling operations because of safe shelters, and the delivery of an explosive device proposes to produce a blasting facility using a drill string consisting of drill pipes, a reamer, a string disconnector and a swivel.

In FIG. 1 shows the wiring diagram of a pilot horizontal directional well using a HDD installation, where:

1 - safe shelter;

2 - safe shelter;

3 - an explosive object;

4 - installation of horizontal drilling;

5 - boring tool;

6 - drill string;

7 - pilot horizontal directional well.

In FIG. 2 shows a scheme for expanding a pilot horizontal directional well using a HDD installation, where:

8 - expander.

In FIG. 3 shows a diagram of the delivery of an explosive device using a HDD installation, where:

9 - column disconnector;

10 - swivel;

11 - explosive device.

The method of delivery of explosives using the installation of HDD is as follows. Due to the safe shelter 1 for the safe shelter 2 under the blasting object 3, a horizontal drilling unit 4 using a drilling tool 5, a drill string 6 consisting of drill pipes, a pilot horizontal well 7 is drilled, after which drilling tool 5 is replaced on the expander 8 and reverse thrust with rotation, the pilot horizontal well 7 is expanded. When re-expanded to the expander 8 through the disconnector of the column 9 and the swivel 10 are connected to explosive device 11. It is delivered under an explosive object 3 with an accuracy of 1 m, since the length of the constituent elements in the drill string 6 is known in advance. The direction of the pilot horizontal directional well 7 and the depth of its passage are determined only in the safe shelter zones 1, 2 with traditional for drilling wells using HDD method of navigation equipment. Before carrying out blasting using the disconnector of the string 9, changing the rotation of the drill string to the opposite, set the blasting device 11 at the right point and remove the components of the drill string 6 from the well. Blasting of the blasting device 11 can be carried out by any known method, both wired and wireless .

The proposed method can be used when conducting explosions of high power, helps to increase the efficiency of blasting and increase their safety, since they are carried out from a safe distance due to shelter.

Information sources

1. http://www.allbest.ru/. Kazan (Volga) Federal University, Faculty of Geology, Department of Oil and Gas Geology. Types of perforation wells. 2011 year

Claims (1)

A method for delivering explosive devices using a horizontal directional drilling rig, including the construction of a horizontal directional well under an explosive object, characterized in that drilling operations are carried out because of safe shelters, and the delivery of an explosive device under an explosive object is carried out using a drill string, consisting of drill pipe, expander, disconnector string and swivel.

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