US3663324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid explosive containing a nitramine explosive dissolved in a nitroparaffin
Assignee: Talley Frac Corp
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Filing: 1969-10-27
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Granted: 1972-05-16
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Expires: 1989-10-27
Abstract
Abstract A liquid explosive is described which has a small critical diameter, is safe to handle, is capable of use in cold climates and yet is compatible with the higher temperatures commonly present in subterranean formations, which includes a nitroparaffin compound having dissolved therein a nitramine explosive, a ballistic modifier and a detonation aid in such proportions that the critical diameter of the explosive is on the order of one thirty-second inch. Other constituents may also be added for controlling the consistency and ballistic properties as well as the manufacturing and handling properties of the explosive. A thickening or gelling agent is also preferably added to retain the ballistic modifier as well as any other suspended solids in a uniform dispersion. A method of fracturing well formations for enhancing their productivity, using such liquid explosives, is described.
Inventors
- 👤 Leonard N Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:00
CPC Classifications
C; C06; C06B; C06B25/00; C06B25/36; C06B25/38
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
60 words
A liquid explosive as defined in claim 1 wherein said nitroparaffin is nitromethane, nitroethane, nitropropane tetranitromethane or any combination thereof; said nitramine explosive is cyclotrimethylene trinitramine, cyclotertramethylene tetranitramine or combinations thereof; said detonation aid is nitroglycerin, penetaerythritol tetranitrate, trimethyloltrinitrate, triethyleneglycoldinitrate or any combination thereof; and said ballistic modifier is powdered aluminum, magnesium, aluminum alloy or magnesium alloy or combinations thereof.
Claim 2
Dependent Claim
62 words
A liquid explosive as defined in claim 1 wherein said nitroparaffin constitutes between about 65 and 75 percent; said nitramine explosive constitutes between about 6 and 10 percent; said detonation aid constitutes between about 8 and 12 percent; said ballistic modifier constitutes between about 8 and 12 percent and said thickening agent constitutes between about 1 and 5 percent of the explosive.
Claim 3
Dependent Claim
61 words
A liquid explosive as defined in claim 2 wherein said nitroparaffin constitutes between 65 and 75 percent; said nitramine explosive constitutes between about 6 and 10 percent; said detonation aid constitutes between about 8 and 12 percent; said ballistic modifier constitutes between about 8 and 12 percent and said thickening agent constitutes between about 1 and 5 percent of the explosive.
Claim 4
Dependent Claim
41 words
A liquid explosive as defined in claim 4 wherein said nitroparaffin is nitromethane; said nitramine explosive is cyclotrinethylene trinitramine; said detonation aid is nitroglycerin and said ballistic modifier is aluminum powder having a particle size between about 8 and 15 microns.
Claim 5
Dependent Claim
29 words
A liquid explosive as defined in claim 4 including between about 0 and 4 percent of a processing aid and between about 0 and 3 percent of a stabilizer.
Claim 6
Dependent Claim
39 words
A liquid explosive as defined in claim 4 wherein said nitroparaffin is nitromethane, said nitramine explosive is cyclotrimethylene trinitramine, said detonation aid is penetaerythritol tetranitrate, and including between about 1 1/2 and 2 1/2 percent of an acid scavenger.
Claim 7
Dependent Claim
13 words
A liquid explosive as defined in claim 1 wherein said nitroparaffin is nitromethane.
Claim 8
Dependent Claim
118 words
A viscous, pourable liquid explosive suitable for use at high temperatures, consisting essentially of between about 50 and 80 percent of a nitroparaffin having dissolved therein between about 5 and 10 percent of a nitramine explosive, between about 7 and 20 percent of a detonation aid, between about 5 and 20 percent of a ballistic modifier in the form of a finely divided metallic powder, sufficient thickening agent to maintain an even dispersion of any particulate solids in said explosive, and at least about 1 1/2 percent of an acid scavenger, each of such explosive constituents capable of forming nitrogen oxides having a high enough decomposition temperature to prevent deflagration through nitrogen oxide buildup at said high temperatures.
Claim 9
Dependent Claim
62 words
A liquid explosive as defined in claim 9 wherein said nitroparaffin constitutes between about 65 and 75 percent; said nitramine explosive constitutes between about 6 and 10 percent; said detonation aid constitutes between about 8 and 12 percent; said ballistic modifier constitutes between about 8 and 12 percent and said thickening agent constitutes between about 1 and 5 percent of the explosive.
References Cited (Backward Citations)
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Cited
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US3338165A
Cited
US3377217A
Cited
US3379586A
Cited
US3489623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |