Extended jet perforating device
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.
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.