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US3717207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perforating apparatus
Assignee: Schlumberger Technology Corp
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Filing: 1971-06-23
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Granted: 1973-02-20
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Expires: 1991-06-23
Abstract
Abstract IN THE REPRESENTATIVE EMBODIMENT OF THE PRESENT INVENTION DISCLOSED HEREIN, SHAPED CHARGES ADAPTED FOR INSTALLATION IN A TYPICAL END-LOADED CARRIER ARE RESPECTIVELY PROVIDED WITH A RIGID ANNULAR RETAINER MEMBER WHICH IS MOVABLY DISPOSED ON THE FORWARD END OF EACH CHARGE. CAMMING SURFACES ARE COOPERATIVELY ARRANGED FOR SHIFTING THE RETAINER MEMBER FORWARDLY IN RELATION TO THE SHAPED CHARGE ONCE IT IS INSTALLED IN THE CARRIER FACING AND ALIGNED WITH A LATERAL PORT THEREIN. IN THIS MANNER, WHEN THE PORT PLUG IS INSTALLED IN THE PORT, IT WILL ENGAGE THE RETAINER AND TIGHTLY ANCHOR THE SHAPED CHARGE IN POSITION.
Inventors
- 👤 J Shore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:21
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |