US3128701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped charge perforating apparatus
Assignee: Western Company of North America
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Filing: 1958-07-24
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Granted: 1964-04-14
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Expires: 1978-07-24
Abstract
No abstract record available.
Inventors
- 👤 John S Rinehart
- 👤 Robert D Cocanower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:33
CPC Classifications
F; F42; F42B; F42B1/00; F42B1/02; F42B1/028; F42B1/032
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A WELL BOREHOLE CASING PERFORATING APPARATUS COMPRISING A CLOSED CONTAINER CAPABLE OF BEING INSERTED INTO A WELL BOREHOLE COMPRISING A HOUSING HAVING AN OPEN END AND CONTAINING A SHAPED HIGH-ORDER EXPLOSIVE CHARGE AND A LOW MELTING METALLIC CONCAVE LINER SEALING THE OPEN END OF SAID HOUSING, SAID LOW MELTING METALLIC CONCAVE LINER BEING COMPOSED OF A METAL HAVING A MELTING POINT OF NOT MORE THAN ABOUT 500*C., THE SURFACE AREA OF SAID LINER IN CONTACT WITH SAID EXPLOSIVE CHARGE BEING SUCH THAT SAID LINER WILL DISINTEGRATE UPON DETONATION OF SAID EXPLOSIVE CHARGE, SAID LINER HAVING A THICKNESS TO DIAMETER RATIO WITHIN THE AREA DELINEATED BY THE POINTS ABCD OF FIG. 4 OF THE ATTACHED DRAWINGS AND WHICH WILL PRODUCE A RESULTING PERFORATION WHICH IS FREE FROM THE PRESENCE OF A METALLIC SLUG.
Claim 2
Dependent Claim
132 words
A WELL BOREHOLE CASING PERFORATING APPARATUS COMPRISING A CLOSED CONTAINER CAPABLE OF BEING INSERTED INTO A WELL BOREHOLE COMPRISING A HOUSING HAVING AN OPEN END AND CONTAINING A SHAPED HIGH-ORDER EXPLOSIVE CHARGE AND A LOW MELTING METALLIC CONCAVE LINER SEALING THE OPEN END OF SAID HOUSING, SAID LOW MELTING METALLIC CONCAVE LINER BEING COMPOSED OF A METAL HAVING A MELTING POINT OF NOT MORE THAN ABOUT 500*C., THE SURFACE AREA OF SAID LINER IN CONTACT WITH SAID EXPLOSIVE CHARGE BEING SUCH THAT SAID LINER WILL DISINTEGRATE UPON DETONATION OF SAID EXPLOSIVE CHARGE, SAID LINER HAVING A THICKNESS TO DIAMETER RATIO WITHIN THE AREA DELINEATED BY THE POINTS ABCD OF FIG. 4 OF THE ATTACHED DRAWINGS AND WHICH WILL PRODUCE A RESULTING PERFORATION WHICH IS FREE FROM THE PRESENCE OF A METALLIC SLUG.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |