Systems, apparatuses, devices, and methods for initiating or detonating tertiary explosive media by way of photonic energy

Patent metadata

Field	Value
Publication number	US-11585643-B2
Application number	US-201916978347-A
Country	US
Kind code	B2
Filing date	Mar 8, 2019
Priority date	Mar 8, 2018
Publication date	Feb 21, 2023
Grant date	Feb 21, 2023

Abstract

In an embodiment, a photoinitiation apparatus includes: a set of illumination sources or elements configured for outputting optical energy; a body structure having a proximal body structure portion confining a proximal volume of explosive medium, an intermediate body structure portion confining an intermediate volume of explosive medium, and a distal body structure portion confining a distal volume of explosive medium, wherein the proximal volume of explosive medium is optically coupled to portions of the first volume of explosive medium, at least one of the proximal volume of explosive medium and the distal volume of explosive medium is a tertiary explosive medium, and (a) the body structure does not carry a primary explosive composition and does not carry a secondary explosive composition, and/or (b) each of the proximal, intermediate, and distal volumes of explosive media has an initiation sensitivity that is less than cyclotrimethylenetrinitramine (RDX) based explosive compositions.

First claim

The invention claimed is:

1. A photoinitiation apparatus configured for photoinitiating an explosive medium carried thereby, the photoinitiation apparatus comprising:
a set of illumination sources or elements coupled to a power source, the set of illumination sources or elements configured to output electromagnetic energy having at least one wavelength within or between ultraviolet (UV) and infrared (IR) portions of the electromagnetic spectrum; and
a body structure that internally carries at least one explosive medium, and which provides a confinement structure for the at least one explosive medium carried thereby,
wherein the body structure (i) excludes each of a primary explosive composition and a secondary explosive composition and (ii) confines at least a first volume of tertiary explosive in a first portion of the body structure,
wherein the first volume of tertiary explosive in the first portion of the body structure (i) is photonically coupled to the set of illumination sources or elements, and (ii) contains a photoexcitation transfer agent or a photothermal absorber comprising bitumen, crude oil, gilsonite, bunker oil, or coal dust,
wherein the body structure is configured for each of (a) residing in a borehole that has been loaded with a column of an additional or adjunctive tertiary explosive medium that resides external to the body structure, and (b) coupling a detonation front into the column of additional or adjunctive tertiary explosive medium to detonate the additional or adjunctive tertiary explosives medium.

2. The photoinitiation apparatus of claim 1 , wherein each initiation apparatus comprises a second volume of tertiary explosive medium in a second portion of the body structure, wherein the first volume of tertiary explosive medium does not completely overlap with a spatial extent of the second volume of tertiary explosive medium.

3. The photoinitiation apparatus of claim 2 , wherein each of the first volume of tertiary explosive medium and the second volume of tertiary explosive medium comprises a fuel or fuel phase and an oxidizer salt.

4. The photoinitiation apparatus of claim 2 , wherein the body structure further comprises an intermediate body structure portion disposed between the first body structure portion and the second body structure portion and confining an intermediate volume of explosive medium, the intermediate volume of explosive medium comprising a liquid explosive medium, a gel-based explosive medium, a binary explosive medium, or a peroxide-based explosive medium.

5. The photoinitiation apparatus of 2 , wherein each of the first volume of tertiary explosive medium and the second volume of tertiary explosive medium comprises an ammonium nitrate (AN) based emulsion explosive medium.

6. The photoinitiation apparatus of 4 , wherein the intermediate volume of explosive medium comprises one of nitromethane, nitroethane, nitropropane and hydrogen peroxide.

Assignees

• Orica Int Pte Ltd

Inventors

• Johnson David Olaf
• Appleby Rodney Wayne
• Goodridge Richard John
• Lee Ming Chung
• Sanchez Francisco
• Rawls Matthew Tolliver

Classifications

• C06C7/00

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

• F42D1/04

  Arrangements for ignition {(ignition systems for shaped charge perforators E21B43/1185; ignition devices for seismic energy generators G01V1/06)} · CPC title

• F42B3/113 Primary

  activated by optical means, e.g. laser, flashlight · CPC title