IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0643988
(2009-12-21)
|
등록번호 |
US-8161880
(2012-04-24)
|
발명자
/ 주소 |
- Wuensche, Thomas J.
- Barker, James
- Moritz, Gayle
|
출원인 / 주소 |
- Halliburton Energy Services, Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
14 |
초록
▼
A detonator assembly is provided. The detonator assembly comprises a deflagration to detonation transition body, a first thermally stable secondary explosive contained by the body, and a bulkhead coupled to the deflagration to detonation transition body. The bulkhead contains pressure within the bod
A detonator assembly is provided. The detonator assembly comprises a deflagration to detonation transition body, a first thermally stable secondary explosive contained by the body, and a bulkhead coupled to the deflagration to detonation transition body. The bulkhead contains pressure within the body associated with firing the detonator assembly at least until a transition from a deflagration operation mode of the detonator assembly to a detonation operation mode of the detonator assembly has occurred. A second thermally stable secondary explosive may alternatively be included in the deflagration to detonation transition body, either separated from the first thermally stable secondary explosive or mixed with the first thermally stable secondary explosive. The detonator assembly comprises effectively no primary explosive.
대표청구항
▼
1. A detonator assembly, comprising: a deflagration to detonation transition body;a first thermally stable secondary explosive contained by the body;a second thermally stable secondary explosive, wherein the second thermally stable secondary explosive is less sensitive than the first thermally stabl
1. A detonator assembly, comprising: a deflagration to detonation transition body;a first thermally stable secondary explosive contained by the body;a second thermally stable secondary explosive, wherein the second thermally stable secondary explosive is less sensitive than the first thermally stable secondary explosive, and wherein the first thermally stable secondary explosive and the second thermally stable secondary explosive are mixed, wherein the concentration of the first thermally stable secondary explosive ranges from 75% to 95% of the mixture of the first thermally stable secondary explosive and the second thermally stable secondary explosive;a bulkhead coupled to the deflagration to detonation transition body that contains pressure within the body associated with firing the detonator assembly at least until a transition from a deflagration operation mode of the detonator assembly to a detonation operation mode of the detonator assembly has occurred; andan initiator assembly coupled to the deflagration to detonation transition body inwards of the bulkhead, wherein a layer of the first thermally stable secondary explosive is contained by the deflagration to detonation transition body between the initiator assembly and the mixture of the first thermally stable secondary explosive and the second thermally stable secondary explosive,wherein the detonator assembly comprises effectively no primary explosive. 2. The detonator assembly of claim 1, wherein the bulkhead substantially contains pressure within the body for at least 0.5 microsecond after activation of the mixture of the first thermally stable secondary explosive and the second thermally stable secondary explosive. 3. The detonator assembly of claim 1, wherein the coupling of the bulkhead to the deflagration to detonation body withstands at least a 50 pounds per square inch pressure exerted on the bulkhead by pressure within the body associated with firing the detonator assembly. 4. The detonator assembly of claim 1, wherein the bulkhead is coupled to the deflagration to detonation transition body by one of a screw, a bolt, a rivet, an adhesive, a locking ring, a pin, an interference fit, a snap fit, or a threaded engagement between the bulkhead and the deflagration to detonation transition body. 5. The detonator assembly of claim 1, further comprising a metal powder contained by the deflagration to detonation transition body, wherein the metal powder is mixed with the mixture of the first thermally stable secondary explosive and the second thermally stable secondary explosive. 6. The detonator assembly of claim 1, wherein the deflagration to detonation transition body is open only at a bulkhead end of the deflagration to detonation transition body. 7. A detonator, comprising: a deflagration to detonation transition body;an initiator coupled to a first opening of the body;a first thermally stable secondary explosive;a second thermally stable secondary explosive, wherein the first thermally stable secondary explosive and the second thermally stable secondary explosives are mixed and contained within the deflagration to detonation transition body;a booster assembly coupled to a second opening of the deflagration to detonation transition body, wherein the booster assembly comprises a packed thermally stable secondary explosive; anda bulkhead to retain the initiator assembly coupled to the first opening at least until a transition of the mixture of the first thermally stable secondary explosive and the second thermally stable secondary explosive to detonation occurs during firing of the detonator,wherein the detonator comprises effectively no primary explosive. 8. The detonator of claim 7, wherein the initiator comprises one of a semiconductor bridge, a primer, or a percussion cap. 9. The detonator of claim 7, wherein the first thermally stable secondary explosive is related to NONA, wherein the second thermally stable secondary explosive is related to HNS. 10. The detonator of claim 9, wherein the mixture of the first thermally stable secondary explosive and the second thermally stable secondary explosive is vibrated into the body. 11. The detonator of claim 7, wherein an interior cavity defined by the deflagration to detonation transition body narrows towards the booster assembly. 12. The detonator of claim 7, further comprising combustible fuse material contained within the deflagration to detonation transition body, between the initiator and the mixture of the first thermally stable secondary explosive and the second thermally stable secondary explosive. 13. The detonator of claim 7, comprising: wherein the first thermally stable secondary explosive is less sensitive than PETN explosive;wherein the second thermally stable secondary explosive is less sensitive than PETN explosive; andwherein the first thermally stable secondary explosive is more sensitive than the second thermally stable secondary explosive. 14. The detonator of claim 7, wherein the first thermally stable secondary explosive comprises from 65% to 98% of the mixture of the first thermally stable secondary explosive and the second thermally stable secondary explosive. 15. The detonator of claim 7, wherein the first thermally stable secondary explosive comprises from 75% to 95% of the mixture of the first thermally stable secondary explosive and the second thermally stable secondary explosive. 16. The detonator of claim 7, wherein the first thermally stable secondary explosive and the second thermally stable secondary explosive are each selected from the group consisting of NONA, HNS-I, HNS-II, HNS-IV, BRX, PYX, Tacot, ONT, DODECA, or CL20. 17. A detonator assembly, comprising: a deflagration to detonation transition body, wherein the deflagration to detonation transition body is formed of a single piece of material, and wherein the deflagration to detonation transition body is open only at a bulkhead end of the deflagration to detonation transition body;a first thermally stable secondary explosive contained by the body;a second thermally stable secondary explosive, wherein the second thermally stable secondary explosive is less sensitive than the first thermally stable secondary explosive, and wherein the first thermally stable secondary explosive and the second thermally stable secondary explosive are mixed;a packed layer of the second thermally stable secondary explosive at an end of the deflagration to detonation transition body opposite the bulkhead end of the deflagration to detonation transition body, wherein the mixture of the first thermally stable secondary explosive and the second thermally stable secondary explosive is located between the packed layer of the second thermally stable secondary explosive and the bulkhead end of the deflagration to detonation transition body; anda bulkhead coupled to the bulkhead end of the deflagration to detonation transition body that contains pressure within the body associated with firing the detonator assembly at least until a transition from a deflagration operation mode of the detonator assembly to a detonation operation mode of the detonator assembly has occurred, wherein the detonator assembly comprises effectively no primary explosive.
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