Enhanced linear shaped charge including spinal charge element

Patent metadata

Field	Value
Publication number	US-9625240-B2
Application number	US-201514951680-A
Country	US
Kind code	B2
Filing date	Nov 25, 2015
Priority date	Aug 12, 2013
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

An enhanced linear shaped charge (X-Jet) includes a sheath and a spinal charge element. The sheath extends along an axis between a first end and a second end to define a sheath length. The sheath has a first hollowed chevron-shaped cross-section that defines a main charge cavity, an upper apex, and a lower apex. The spinal charge element is disposed within the main charge cavity and abuts the upper apex. The spinal charge element further includes a spinal casing that extends along the sheath length to define a spinal length. The spinal casing has a hollowed cross-section defining a spinal charge cavity.

First claim

What is claimed is:

1. An enhanced linear shaped explosive device (X-Jet), comprising:
a sheath extending along an axis between a first end and a second end to define a sheath length, the sheath having a first hollowed chevron-shaped cross-section that defines a main charge cavity, an upper apex, and a lower apex, the main charge cavity loaded with a main explosive charge material; and
a spinal charge element located within the main charge cavity and abutting the upper apex, the spinal charge element having a spinal casing that is formed integrally with the upper apex and that extends along the sheath length to define a spinal length and having a second hollowed cross-section defining a spinal charge cavity, the spinal charge cavity loaded with a spinal explosive charge material.

2. The X-Jet of claim 1 , wherein the sheath and the spinal charge element are formed from the same material such that the spinal casing is formed integrally with the upper apex.

3. The X-Jet of claim 1 , wherein the spinal casing is aligned with the upper apex and lower apex.

4. The X-Jet of claim 3 , wherein the spinal charge element has one of a circular-shaped cross-section, a square-shaped cross-section, a diamond-shaped cross-section, or polygonal-shape cross-section.

5. The X-Jet of claim 4 , wherein the upper apex has a hollow void extending therethrough, the void surrounded by the upper apex and the integrally formed spinal casing defining the spinal charge cavity.

6. The X-Jet of claim 5 , wherein the main charge cavity contains the main charge material configured to generate a main detonation wave having a main detonation velocity, and the spinal charge cavity contains the spinal charge material configured to generate a spinal detonation wave having a spinal detonation velocity that is greater than the main detonation velocity.

7. The X-Jet of claim 6 , wherein the spinal detonation wave travels in a spinal direction parallel to the sheath length, and the main detonation wave travels in a direction perpendicular to the spinal detonation wave.

8. The X-Jet of claim 7 , wherein the main detonation wave generates a molten jet that is projected from the sheath and that travels in a direction parallel to the main detonation wave.

9. The X-Jet of claim 8 , wherein a packing density of the spinal charge material contained in the spinal charge cavity is greater than a packing density of the main charge material contained in the main charge cavity.

10. The X-Jet of claim 5 , wherein a first size of the spinal charge element is less than a second size of the upper apex such that no air gap exists between the sheath and the spinal casing.

11. The X-Jet of claim 10 , wherein no air gap exists between the spinal charge element and the explosive charge material within the main charge cavity.

12. The X-Jet of claim 10 , wherein the explosive charge material within the main charge cavity directly contacts an entire outer surface of the spinal charge element and directly contact an inner surface of the main charge cavity.

Assignees

• Goodrich Corp

Inventors

• Mcdonald Steven
• Way Dennis

Classifications

• F42B3/08 Primary

  with cavities in the charge, e.g. hollow-charge blasting cartridges · CPC title

• F42B1/028 Primary

  characterised by the form of the liner · CPC title

• F42B1/02 Primary

  Shaped or hollow charges (blasting cartridges with cavities in the charge F42B3/08; oil winning using shaped-charge perforators E21B43/116) · CPC title