Patent US2669371A successfully refreshed from Google Patents.
Patent US3269467A successfully refreshed from Google Patents.
US3269467A
Expired / Lapsed
US
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Shaped charge apparatus
Assignee: Schlumberger Well Surveying Corp
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Filing: 1964-06-11
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Granted: 1966-08-30
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Expires: 1984-06-11
Abstract
No abstract record available.
Inventors
- 👤 William T Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:18
CPC Classifications
F; F42; F42B; F42B1/00; F42B1/02; F42B1/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A METHOD FOR PERFORATING EARTH FORMATIONS TRAVERSED BY A CASED WELL BORE COMPRISING THE STEPS OF: POSITIONED A SHAPED CHARGE IN PROXIMATE CONTACT WITH THE WALL OF A CASING; GENERATING A PERFORATING JET WITH A PILOT PORTION TO PENETRATE THE WALL OF THE CASING AND INITIALLY FORM AN
Claim 2
Independent Claim
48 words
A METHOD FOR PERFORATING EARTH FORMATIONS TRAVERSED BY A CASED WELL BORE COMPRISING THE STEPS OF: POSITIONED A SHAPED CHARGE IN PROXIMATE CONTACT WITH THE WALL OF A CASING; GENERATING A PERFORATING JET WITH A PILOT PORTION TO PENETRATE THE WALL OF THE CASING AND INITIALLY FORM AN
References Cited (Backward Citations)
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GB839872A
Cited
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FR1283683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |