Perforating systems with insensitive high explosive

Patent metadata

Field	Value
Publication number	US-10746002-B2
Application number	US-201415501198-A
Country	US
Kind code	B2
Filing date	Sep 3, 2014
Priority date	Sep 3, 2014
Publication date	Aug 18, 2020
Grant date	Aug 18, 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

The invention claimed is:

1. A shaped charge for a wellbore perforation system, wherein the shaped charge comprises:
a main charge including an insensitive high explosive and operable to perforate a wellbore, wherein the insensitive high explosive has a higher test value for at least one of impact sensitivity, friction sensitivity, or spark sensitivity, than the corresponding test value of cyclotrimethylenetrinitramine (RDX); and
a booster charge comprising a superfine insensitive high explosive having particles with sizes between 1 micron and 50 microns, wherein the superfine insensitive high explosive has the higher test value for at least one of impact sensitivity, friction sensitivity, or spark sensitivity, than the corresponding test value of cyclotrimethylenetrinitramine (RDX),
wherein the superfine insensitive high explosive is different from the insensitive high explosive.

2. The shaped charge of claim 1 , wherein the 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.

3. The shaped charge of claim 1 , wherein the superfine 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.

4. The shaped charge of claim 1 , wherein the insensitive high explosive has a higher test value for at least one of impact sensitivity, friction sensitivity, or spark sensitivity, than the corresponding test value of at least one of cyclotetramethylene-tetranitramine (HMX), hexanitrostilbene (HNS), 2,6-bis(picrylamino)-3,5-dinitropyridine (PYX), 2,2′,2″,4,4′,4″,6,6′,6″-Nonanitro-m-terphenyl (NONA), 3,5-trinitro-2,4,6-tripicrylbenzene (BRX), lead azide, silver azide, or titanium subhydride potassiumperchlorate (THKP).

5. The shaped charge of claim 1 , wherein the superfine insensitive high explosive has a higher test value for at least one of impact sensitivity, friction sensitivity, or spark sensitivity, than the corresponding test value of at least one of cyclotetramethylene-tetranitramine (HMX), hexanitrostilbene (HNS), 2,6-bis(picrylamino)-3,5-dinitropyridine (PYX), 2,2′,2″,4,4′,4″,6,6′,6″-Nonanitro-m-terphenyl (NONA), 3,5-trinitro-2,4,6-tripicrylbenzene (BRX), lead azide, silver azide, or titanium subhydride potassiumperchlorate (THKP).

6. The shaped charge of claim 1 , wherein the insensitive high explosive comprises triaminotrinitrobenzene (TATB).

7. The shaped charge of claim 1 , wherein the insensitive high explosive comprises diamino-trinitrobenzene (DATB).

8. The shaped charge of claim 1 , wherein the insensitive high explosive comprises hexanitroazobenzene (HNAB).

9. The shaped charge of claim 1 , wherein the insensitive high explosive comprises 3-nitro-1,2,4-triazol-5-one (NTO).

10. The shaped charge of claim 1 , wherein the superfine insensitive high explosive comprises triaminotrinitrobenzene (TATB).

11. The shaped charge of claim 1 , wherein the superfine insensitive high explosive comprises diamino-trinitrobenzene (DATB).

12. The shaped charge of claim 1 , wherein the superfine insensitive high explosive comprises hexanitroazobenzene (HNAB).

13. The shaped charge of claim 1 , wherein the superfine insensitive high explosive comprises 3-nitro-1,2,4-triazol-5-one (NTO).

14. The shaped charge of claim 1 , wherein the insensitive high explosive further comprises a binder.

15. The shaped charge of claim 1 , wherein the superfine insensitive high explosive further comprises a binder.

16. The shaped charge of claim 3 , wherein the superfine insensitive high explosive has an average particle size of between 1 micron and 10 microns.

17. The shaped charge of claim 1 , further comprising a booster charge comprising a flyer plate.

18. The shaped charge of claim 1 , further comprising a booster charge comprising an anvil.

19. The shaped charge of claim 1 , further comprising a booster charge comprising an external flyer plate.

Assignees

• Halliburton Energy Services Inc

Inventors

• Barker James Marshall
• Burky Thomas Earl

Classifications

• E21B43/11857

  firing indication systems · CPC title

• E21B43/117 Primary

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

• F42B3/11

  characterised by the material used, e.g. for initiator case or electric leads (F42B3/107 takes precedence) · CPC title

• C06C5/04

  Detonating fuses · CPC title

• E21B43/11855

  mechanically actuated, e.g. by movement of a wireline or a drop-bar (E21B43/11852 takes precedence) · CPC title