Patent US3211228A successfully refreshed from Google Patents.
US3211228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Completion tool for oil wells
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
2026-10-30 16:40
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1294
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
IN AN ACCESS VALVE FOR COMPLETING AN OIL WELL HAVING A CASING AND A STRING OF TUBING THEREIN, A PACKER FOR PROVIDING A SEAL ABOUT SAID TUBING IN SAID CASING, THE SAID PACKER HAVING A TUBULAR MANDREL SLIDABLE THEREIN AND CONNECTED TO SAID TUBEING STRING, MEANS COMPRISING A PLURALITY OF SLIPS FOR RELEASABLY SUPPORTING SAID PACKER ON SAID MANDREL IN SUSPENDED POSITION IN SAID WELL, THE SAID MANDREL HAVING A PORT NEAR ITS LOWER END AND HAVING SEALING RINGS THEREON ON EACH SIDE OF SAID PORT, A SLEEVE ATTACHED TO THE LOWER END OF SAID PACKER AND SLIDABLY EMBRACING SAID MANDREL TO COVER SAID PORT AND SAID SEALING RING WHILE SAID PACKER IS IN ITS SUSPENDED POSITION, THE SAID MANDREL BEING CAPABLE OF EXTENDING BELOW THE LOWER END OF SAID SLEEVE TO UNCOVER SAID PORT WHEN SAID PACKER IS SET IN SAID CASING, A HOLLOW BREAK-OFF PLUG HAVING AN INITIALLY CLOSED INNER END THREADED IN SAID PORT AND EXTENDING INTERNALLY OF SAID MANDREL, A SECOND PLUG CLOSING THE LOWER END OF SAID MANDREL CAPABLE OF BEING REMOVED WHEN SAID BREAK-OFF PLUG IS BROKEN AWAY TO ADMIT WELL FLUIDS INTO SAID MANDREL.
Claim 2
Dependent Claim
191 words
IN AN ACCESS VALVE FOR COMPLETING AN OIL WELL HAVING A CASING AND A STRING OF TUBING THEREIN, A PACKER FOR PROVIDING A SEAL ABOUT SAID TUBING IN SAID CASING, THE SAID PACKER HAVING A TUBULAR MANDREL SLIDABLE THEREIN AND CONNECTED TO SAID TUBEING STRING, MEANS COMPRISING A PLURALITY OF SLIPS FOR RELEASABLY SUPPORTING SAID PACKER ON SAID MANDREL IN SUSPENDED POSITION IN SAID WELL, THE SAID MANDREL HAVING A PORT NEAR ITS LOWER END AND HAVING SEALING RINGS THEREON ON EACH SIDE OF SAID PORT, A SLEEVE ATTACHED TO THE LOWER END OF SAID PACKER AND SLIDABLY EMBRACING SAID MANDREL TO COVER SAID PORT AND SAID SEALING RING WHILE SAID PACKER IS IN ITS SUSPENDED POSITION, THE SAID MANDREL BEING CAPABLE OF EXTENDING BELOW THE LOWER END OF SAID SLEEVE TO UNCOVER SAID PORT WHEN SAID PACKER IS SET IN SAID CASING, A HOLLOW BREAK-OFF PLUG HAVING AN INITIALLY CLOSED INNER END THREADED IN SAID PORT AND EXTENDING INTERNALLY OF SAID MANDREL, A SECOND PLUG CLOSING THE LOWER END OF SAID MANDREL CAPABLE OF BEING REMOVED WHEN SAID BREAK-OFF PLUG IS BROKEN AWAY TO ADMIT WELL FLUIDS INTO SAID MANDREL.
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 |