Patent US3211229A successfully refreshed from Google Patents.
US3211229A
Expired / Lapsed
US
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Oil well completion tool
Assignee: Bramlett Oil Field Service Inc
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Filing: 1962-11-21
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Granted: 1965-10-12
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Expires: 1982-11-21
Abstract
No abstract record available.
Inventors
- 👤 Merlin F Bramlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:20
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1294
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
145 words
IN AN OIL WELL COMPLETING AND TESTING TOOL, IN COMBINATION WITH A STRING OF TUBING, A PACKER ON THE LOWER END OF SAID TUBING AND HAVING A TUBULAR MANDREL SLIDABLE THEREIN AND DEFINING A FLUID PASSAGE THROUGH SAID PACKER EXTERIORLY OF SAID MANDREL, A CLOSURE ON SAID MANDREL ADAPTED TO CLOSE SAID PASSAGE WHEN SAID PACKER IS SET, SAID MANDREL HAVING A PORT THEREIN NEAR ITS LOWERMOST END, A SLEEVE ATTACHED TO THE LOWER END OF SAID PACKET AND SLIDABLY EMBRACING SAID MANDREL WHEREBY TO CLOSE SAID PORT WHEN SAID PACKER IS SUSPENDED ON SAID SLEEVE TO EXPOSE SAID MANDREL BEING EXTENDED BELOW SAID SLEEVE TO EXPOSE SAID PORT WHEN THE MANDREL IS SEATED AND SUPPORTED ON SAID PACKET, AND A PLUG INITIALLY REMOVABLY CLOSING THE LOWERMOST END OF SAID MANDREL CAPABLE OF BEING DISLODGED WHEN PRESSURES INTERNALLY AND EXTERNALLY OF SAID MANDREL ARE EQUALIZED.
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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |