Perforating systems with insensitive high explosive

Patent metadata

Field	Value
Publication number	US-10677572-B2
Application number	US-201816171758-A
Country	US
Kind code	B2
Filing date	Oct 26, 2018
Priority date	Sep 3, 2014
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

The disclosure relates to perforating systems for perforating the casing of a wellbore. The perforating systems contain insensitive high explosives. The disclosure also relates to shaped charges containing insensitive high explosives for use in such perforating systems. The disclosure further relates to methods of using such perforating systems to perforate the casing of a wellbore.

First claim

What is claimed is:

1. A method of perforating a wellbore, comprising detonating a perforation system in the wellbore to form at least one perforation in a casing of the wellbore, wherein the perforation system includes:
a) at least one shaped charge, each shaped charge including a first insensitive high explosive;
b) at least one booster including a bi-directional booster including a donor container with an associated donor flyer plate and an acceptor container with an associated acceptor flyer plate; and
c) at least one detonator,
wherein detonating the perforation system comprises detonating the at least one detonator, which results in detonation of the at least one booster and the at least one shaped charge, causing the donor flyer plate to strike the acceptor flyer plate.

2. The method of claim 1 , wherein the detonator additionally comprises a second insensitive high explosive.

3. The method of claim 1 , wherein the first insensitive high explosive comprises a material selected from the group consisting of triaminotrinitrobenzene (TATB), diamino-trinitrobenzene (DATB), hexanitroazobenzene (HNAB), 3-nitro-1,2,4-triazol-5-one (NTO), and any combinations thereof, and wherein detonating the perforation system comprises detonating the first insensitive high explosive.

4. The method of claim 1 , wherein the perforation system further comprises at least one detonating cord initiator comprising a second insensitive high explosive, and a detonator cord, and wherein detonating the perforation system comprises detonating the detonating cord, which then results in detonation of the at least one detonator and the at least one shaped charge.

5. The method of claim 1 , wherein detonation causes the donor flyer plate to form a flat-topped shock wave.

6. The method of claim 1 , wherein the donor flyer plate comprises a curved flyer plate and detonation causes the flyer plate to flatten.

7. The method of claim 1 , wherein the shaped charge comprises a main charge comprising a second insensitive high explosive, and wherein the main charge perforates the wellbore.

8. The method of claim 1 , wherein the perforation system further comprises a superfine insensitive high explosive with an average particle size of between 1 micron and 50 microns, and wherein detonating the perforation system comprises detonating the superfine insensitive high explosive.

9. The method of claim 1 , comprising a plurality of shaped charges arranged in a helix.

10. A wellbore perforation system comprising:
at least one shaped charge, each shaped charge including a first insensitive high explosive;
at least one booster including a bi-directional booster including a donor container with an associated donor flyer plate and an acceptor container with an associated acceptor flyer plate; and
at least one detonator operable to, upon detonation, detonate the at least one booster and the at least one shaped charge to cause the donor flyer plate to strike the acceptor flyer plate,
wherein the system is operable to perforate a casing of a wellbore.

11. The wellbore perforation system of claim 10 , wherein the detonator additionally comprises a second insensitive high explosive.

12. The wellbore perforation system of claim 10 , wherein the first insensitive high explosive comprises a material selected from the group consisting of triaminotrinitrobenzene (TATB), diamino-trinitrobenzene (DATB), hexanitroazobenzene (HNAB), 3-nitro-1,2,4-triazol-5-one (NTO), and any combinations thereof.

13. The wellbore perforation system of claim 10 , wherein the perforation system further comprises at least one detonating cord initiator comprising a second insensitive high explosive, and a detonator cord operable to detonate the detonator.

14. The wellbore perforation system of claim 10 , wherein the donor flyer plate is operable to form a flat-topped shock wave upon detonation of the booster.

15. The wellbore perforation system of claim 10 , wherein the donor flyer plate comprises a curved flyer plate operable to flatten upon detonation of the booster.

16. The wellbore perforation system of claim 10 , wherein the shaped charge comprises a main charge comprising a second insensitive high explosive and operable to perforate a wellbore.

17. The wellbore perforation system of claim 10 , wherein the perforation system further comprises a superfine insensitive high explosive with an average particle size of between 1 micron and 50 microns.

18. The wellbore perforation system of claim 10 , comprising a plurality of shaped charges arranged in a helix.

Assignees

• Halliburton Energy Services Inc

Inventors

• Barker James Marshall
• Burky Thomas Earl

Classifications

• E21B43/117 Primary

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

• F42B1/024 Primary

  provided with embedded bodies of inert material · CPC title

• E21B43/11857

  firing indication systems · CPC title

• E21B43/1185

  Ignition systems · CPC title

• E21B43/116 Primary

  Gun or shaped-charge perforators · CPC title