Extended jet perforating device

Patent metadata

Field	Value
Publication number	US-9822617-B2
Application number	US-201213985046-A
Country	US
Kind code	B2
Filing date	Sep 19, 2012
Priority date	Sep 19, 2012
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

An explosive charge assembly comprises a casing, a first liner, a second liner, a first explosive charge disposed between the casing and the first liner, and a second explosive charge disposed between the first liner and the second liner. The first liner and the second liner are configured to form a single jet upon detonation of the first explosive charge and the second explosive charge.

First claim

What is claimed is:

1. An explosive charge assembly comprising:
a casing;
a first liner;
a second liner;
a first explosive charge disposed between the casing and the first liner;
a second explosive charge disposed between the first liner and the second liner, wherein the first liner and the second liner are collapsible to provide a stream of particles that form a single jet upon detonation of the first explosive charge and the second explosive charge; and
a booster charge configured to only directly detonate the first explosive charge.

2. The assembly of claim 1 , wherein at least one of the first explosive charge or the second explosive charge comprises a compound selected from the group consisting of: lead azide, pentaerythritol tetranitrate (PETN), cyclotrimethylene trinitramine (RDX), hexanitrostilbene (HNS), cyclotetramethylene tetranitramine (HMX), bis(picrylamino)trinitropyridine (PYX), and any combination thereof.

3. The assembly of claim 1 , wherein at least one of a shape or a composition is different between the first explosive charge and the second explosive charge.

4. The assembly of claim 1 , wherein at least one of the first liner or the second liner comprise an aperture at an apex.

5. The assembly of claim 4 , where the aperture extends at least about 5% of a diameter of an inside surface of the casing.

6. The assembly of claim 4 , where the first explosive charge and the second explosive charge contact at the aperture.

7. The assembly of claim 1 , wherein at least one of the first liner or the second liner comprise an opening around a skirt.

8. The assembly of claim 1 , further comprising:
a third liner;
a third explosive charge disposed between the second liner and the third liner; and
wherein the first, second, and third liners are collapsible to provide a stream of particles that form a single jet upon detonation of the first, second, and third explosive charges.

9. The assembly of claim 1 , wherein a portion of the second liner extends towards the first liner.

10. The assembly of claim 9 , wherein the second liner contacts the first liner.

11. The assembly of claim 1 , further comprising an aperture disposed through the second liner and the second explosive charge.

12. The assembly of claim 1 , further comprising a detonator cord coupled to and configured to detonate the booster charge.

13. The assembly of claim 1 , wherein the casing comprises a cylindrical shaped portion and a frusto-conical shaped portion with the booster charge positioned within the frusto-conical shaped portion.

Assignees

• Halliburton Energy Services Inc
• Halliburton Energy Services Inc

Inventors

• Bird Dean Vernell

Classifications

• E21B43/117 Primary

  Shaped-charge perforators (E21B43/118 takes precedence) · CPC title

• F42B3/08

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

• E21B43/116

  Gun or shaped-charge perforators · CPC title

• F42B1/028

  characterised by the form of the liner · CPC title

• E21B43/1185 Primary

  Ignition systems · CPC title