Patent US563819A successfully refreshed from Google Patents.
US4522665A
Expired / Lapsed
US
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Primer mix, percussion primer and method for initiating combustion
Assignee: Halliburton Co
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Filing: 1984-03-08
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Granted: 1985-06-11
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Expires: 2004-03-08
Abstract
Abstract A primer mix which contains from 26 to 66 weight percent titanium and from 74 to 44 weight percent potassium perchlorate having a density of from 68 to 81 percent of crystal density such that the mix is stable at high temperature up to 525° F. for more than 100 hours without degradation and requires a relatively high amount of impact energy greater than 4 ft.-lbs. in order to ignite it. Alternatively, the primer mix contains from 40 to 74 weight percent zirconium and from 60 to 26 weight percent potassium perchlorate having the above density. The primer mix is used in a percussion primer for initiating combustion or in a percussion initiator for detonating a high-order explosive, as used for example within wellbores in the oil and gas industry.
Inventors
- 👤 Donald N. Yates, Jr.
- 👤 Michael Oestrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:22
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/02; C06B33/00; C06B33/06; F; F42; F42C; F42C19/00; F42C19/08; F42C19/10; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/113; Y10S149/114
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
37 words
As an article of manufacture a primer mix, which consists essentially of from 26 to 66 weight percent titanium and from 74 to 44 weight percent potassium perchlorate having a density of from 2.1 to 2.5 g/cc.
Claim 2
Dependent Claim
37 words
As an article of manufacture a primer mix, which consists essentially of from 26 to 66 weight percent titanium and from 74 to 44 weight percent potassium perchlorate having a density of from 2.1 to 2.5 g/cc.
Claim 3
Dependent Claim
32 words
A primer mix as defined in claim 1, wherein the mix is stable up to 525° F. for 100 hours without degradation and is ignited upon an impact greater than 4 ft.-lbs.
Claim 4
Dependent Claim
30 words
A primer mix as defined in claim 1, wherein the density is from 2.3 to 2.5 g/cc such that the mix is ignited upon an impact greater than 6 ft.-lbs.
Claim 5
Dependent Claim
41 words
A primer mix as defined in claim 1, wherein the titanium is in the form of particles of from 1 to 3 microns in diameter and the potassium perchlorate is in the form of particles less than 10 microns in diameter.
Claim 6
Dependent Claim
33 words
A primer mix as defined in claim 1, wherein the amount of titanium is from 39 to 43 weight percent and the amount of potassium perchlorate is from 61 to 57 weight percent.
Claim 7
Dependent Claim
30 words
A primer mix as defined in claim 5, wherein the density is from 2.3 to 2.5 g/cc such that the mix is ignited upon an impact greater than 6 ft.-lbs.
Claim 8
Dependent Claim
41 words
A primer mix as defined in claim 5, wherein the titanium is in the form of particles of from 1 to 3 microns in diameter and the potassium perchlorate is in the form of particles less than 10 microns in diameter.
Claim 9
Dependent Claim
50 words
In a percussion primer for initiating combustion, a primer mix which consists essentially of a mixture of from 26 to 66 weight percent titanium and from 74 to 44 weight percent potassium perchlorate, said mix having a density of from 2.1 to 2.5 g/cc; and a housing for the mixture.
Claim 10
Dependent Claim
50 words
In a percussion primer for initiating combustion, a primer mix which consists essentially of a mixture of from 26 to 66 weight percent titanium and from 74 to 44 weight percent potassium perchlorate, said mix having a density of from 2.1 to 2.5 g/cc; and a housing for the mixture.
Claim 11
Dependent Claim
17 words
A primer mix as defined in claim 8, wherein the density is from 2.3 to 2.5 g/cc.
Claim 12
Dependent Claim
41 words
A primer mix as defined in claim 9, wherein the titanium is in the form of particles of from 1 to 3 microns in diameter and the potassium perchlorate is in the form of particles less than 10 microns in diameter.
Claim 13
Dependent Claim
52 words
In a percussion initiator for detonating a high-order explosive, a primer mix which consists essentially of a mixture of from 26 to 66 weight percent titanium and from 74 to 44 weight percent potassium perchlorate, said mix having a density of from 2.1 to 2.5 g/cc; and a housing for the mixture.
Claim 14
Dependent Claim
52 words
In a percussion initiator for detonating a high-order explosive, a primer mix which consists essentially of a mixture of from 26 to 66 weight percent titanium and from 74 to 44 weight percent potassium perchlorate, said mix having a density of from 2.1 to 2.5 g/cc; and a housing for the mixture.
Claim 15
Dependent Claim
17 words
A primer mix as defined in claim 11, wherein the density is from 2.3 to 2.5 g/cc.
Claim 16
Dependent Claim
41 words
A primer mix as defined in claim 12, wherein the titanium is in the form of particles of from 1 to 3 microns in diameter and the potassium perchlorate is in the form of particles less than 10 microns in diameter.
Claim 17
Dependent Claim
54 words
A method of detonating a high order explosive in operative association with a primer mix as defined in claim 1, which comprises subjecting the primer mix in a housing to impact of at least 4 ft.-lb. such that the energy released by deflagration of the primer mix causes the high order explosive to detonate.
Claim 18
Dependent Claim
54 words
A method of making a primer mix as defined in claim 1, which comprises mixing particles of titanium and potassium perchlorate in a ratio of from 26 to 66 weight percent titanium and from 74 to 44 weight percent potassium perchlorate; and compacting the mixture to a density of from 2.1 to 2.5 g/cc.
Claim 19
Dependent Claim
40 words
As an article of manufacture a primer mix, which consists essentially of from 26 to 66 weight percent titanium and from 74 to 44 weight percent potassium perchlorate, having a density of from 68 of 81 percent of crystal density.
Claim 20
Dependent Claim
40 words
As an article of manufacture a primer mix, which consists essentially of from 26 to 66 weight percent titanium and from 74 to 44 weight percent potassium perchlorate, having a density of from 68 of 81 percent of crystal density.
Claim 21
Dependent Claim
20 words
A primer mix as defined in claim 16, wherein the density is from 75 to 81 percent of crystal density.
Claim 22
Dependent Claim
39 words
As an article of manufacture a primer mix, which consists essentially of from 40 to 70 percent zirconium and from 60 to 26 weight percent potassium perchlorate, having a density of from 68 to 81 percent of crystal density.
Claim 23
Dependent Claim
39 words
As an article of manufacture a primer mix, which consists essentially of from 40 to 70 percent zirconium and from 60 to 26 weight percent potassium perchlorate, having a density of from 68 to 81 percent of crystal density.
Claim 24
Dependent Claim
20 words
A primer mix as defined in claim 18, wherein the density is from 75 to 81 percent of crystal density.
References Cited (Backward Citations)
US3914143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |