High temperature initiator

Patent metadata

Field	Value
Publication number	US-10899680-B2
Application number	US-201716092371-A
Country	US
Kind code	B2
Filing date	Mar 2, 2017
Priority date	May 9, 2016
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

According to an aspect, the present embodiments may be associated with a device and method of using an initiator including a body configured for receiving at least one explosive including barium 5-nitriminotetrazolate (BAX). According to a further aspect, the body of the initiator is configured for receiving at least two layers of explosive. In this embodiment, the layers of explosive include a primary explosive of the barium 5-nitriminotetrazolate (BAX) and a secondary explosive includes 2,6-Bis(picrylamino)-3,5-dinitropyridine (PYX) and/or Hexanitrostilbene (HNS).

First claim

What is claimed is:

1. An initiator, comprising:
a body; and
at least one explosive housed in the body, the at least one explosive comprising barium 5-nitriminotetrazolate (BAX).

2. An initiator, comprising:
a body; and
at least two layers of explosive housed within the body, wherein a first layer of the at least two layers of explosive comprises a primary explosive and a second layer of the at least two layers of explosive comprises a secondary explosive, the primary explosive comprising barium 5-nitriminotetrazolate (BAX) and the secondary explosive comprising 2,6-Bis(picrylamino)-3,5-dinitropyridine (PYX) and/or Hexanitrostilbene (HNS).

3. The initiator of claim 2 , wherein the secondary explosive comprises a combination of BAX and PYX or a combination of PYX and HNS.

4. The initiator of claim 2 , wherein the initiator is initiated by an activator comprising one of an electronic activator and a mechanical activator.

5. The initiator of claim 4 , wherein the electronic activator comprises a fuse head or a bridge wire, wherein upon activation, the fuse head or bridge wire initiates the primary explosive, and the primary explosive initiates the secondary explosive.

6. The initiator of claim 4 , wherein the mechanical activator comprises a percussion device, wherein upon activation and impact of a firing mechanism, the percussion device initiates the primary explosive, and the primary explosive initiates the secondary explosive.

7. The initiator of claim 2 , wherein the body comprises a two-part body comprising:
an upper body; and
a lower body, wherein
the upper body comprises an upper surface and a lower surface, the upper surface comprises a depression positioned centrally in the upper surface of the upper body, and
the lower body comprises an upper surface, a lower surface, an upper recessed portion extending centrally within the lower body from the upper surface of the lower body, at least two primary bores extending from the recessed portion, a secondary bore extending from the primary bores and positioned centrally within the lower body, and a lower recessed portion extending from the secondary bore,
wherein the lower recessed portion extends centrally from the lower surface of the lower body, within the lower body, such that placement of the primary explosive into the upper recessed portion and the primary bores and placement of the secondary explosive into the secondary bore aligns the primary explosive with the secondary explosive, and connection of the upper body to the lower body aligns the depression formed in the upper body with the primary explosive placed in the lower body.

8. The initiator of claim 7 , further comprising a flyer disk positioned within the lower recessed portion, the flyer disk configured to retain the secondary explosive within the secondary bore.

9. The initiator of claim 2 , wherein the body comprises a two-part body having an upper body and a lower body, wherein
the upper body comprises an upper surface and a lower surface, the lower surface comprises a depression positioned centrally in the lower surface of the upper body,
wherein the lower body comprises a secondary bore, and the primary explosive is placed into the depression in the lower surface of the upper body and the secondary explosive is placed into the secondary bore, and
the upper body is connected to the lower body to align the primary explosive with the secondary explosive.

10. The initiator of claim 9 , further comprising a flyer disk positioned within a lower portion of the secondary bore adjacent to and recessed from the lower surface of the lower body, wherein the flyer disk is configured to retain the secondary explosive within the secondary bore.

11. The initiator of claim 2 , wherein the initiator is configured to satisfy one of the following conditions:
(i) withstand temperatures at least as high as about 250° C. for at least about 200 hours without adversely affecting the ability to initiate a detonation; and
(ii) withstand temperatures at least as high as about 300° C. for at least about 1 hour, without adversely affecting the ability to initiate a detonation.

12. The initiator of claim 2 , further comprising a high temperature lacquer applied to the initiator to hermetically seal the initiator against humidity.

13. The initiator of claim 8 , wherein the flyer disk is coupled to the initiator body by a laser welding process.

14. The initiator of claim 8 , further comprising a high temperature lacquer applied to the outer surface of the flyer disk and any exposed portion of the secondary bore to hermetically seal the initiator against humidity.

15. A method of assembling an electronic or electric initiator capable of withstanding temperatures at least as high as about 250° C. for at least about 200 hours without significantly impacting performance of the initiator or temperatures at least as high as about 300° C. for at least about 1 hour without significantly impacting performance of the initiator, the method comprising:
providing a body comprising a fuse head or bridge wire aligned with a primary bore and a secondary bore;
placing a primary explosive comprising barium 5-nitriminotetrazolate (BAX) into the primary bore;
placing a secondary explosive comprising 2,6-Bis(picrylamino)-3,5-dinitropyridine (PYX) into the secondary bore;
aligning the primary explosive with the secondary explosive;
positioning the fuse head or bridge wire in working relationship with the primary explosive such that initiation of the fuse head or bridge wire initiates the primary explosive, and the primary explosive initiates the secondary explosive.

16. The initiator of claim 1 , wherein the initiator is initiated by an activator comprising one of an electronic activator and a mechanical activator.

17. The initiator of claim 16 , wherein the electronic activator comprises a fuse head or a bridge wire, wherein upon activation, the fuse head or bridge wire initiates the primary explosive, and the primary explosive initiates the secondary explosive.

18. The initiator of claim 16 , wherein the mechanical activator comprises a percussion device, wherein upon activation and impact of a firing mechanism, the percussion device initiates the primary explosive, and the primary explosive initiates the secondary explosive.

19. The initiator of claim 1 , wherein the initiator is configured to satisfy one of the following conditions:
(i) withstand temperatures as high as about 250° C. for at least about 200 hours, without adversely affecting the ability to initiate a detonation; and
(ii) withstand temperatures at least as high as about 300° C. for at least about 1 hour, without adversely affecting the ability to initiate a detonation.

20. The initiator of claim 1 , wherein the body comprises a two-part body including an upper body and a lower body, wherein
the upper body comprises an upper surface and a lower surface, the lower surface comprising a depression positioned centrally in the lower surface of the upper body, wherein the at least one explosive comprising barium 5-nitriminotetrazolate (BAX) is placed into the depression in the lower surface of the upper body, and
the lower body comprises a secondary bore configured to receive a secondary explosive, and
the upper body is connected to the lower body to align the at least one explosive with the secondary explosive.

Assignees

• Dynaenergetics Gmbh & Co Kg
• DynaEnergetics Europe GmbH

Inventors

• Löhken Jörn Olaf
• Mcnelis Liam
• Müller Jörg

Classifications

• E21B43/119

  Details, e.g. for locating perforating place or direction · CPC title

• C06C7/00 Primary

  Non-electric detonators; Blasting caps; Primers · CPC title

• C06B41/00 Primary

  Compositions containing a nitrated metallo-organic compound · CPC title

• F42B3/12

  Bridge initiators {(F42B3/103, F42B3/11, F42B3/195 take precedence; electric ignitors in propellant charges F42C19/12)} · CPC title

• F42C19/09

  Primers or detonators containing a hollow charge · CPC title