US3233675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well packers with hydraulic pressure balance
Assignee: Otis Engineering Corp
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Filing: 1962-12-14
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Granted: 1966-02-08
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Expires: 1982-12-14
Abstract
No abstract record available.
Inventors
- 👤 Jack W Tamplen
- 👤 Thomas L Elliston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:30
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295; E21B33/12955
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
160 words
A WELL PACKER INCLUDING: A TUBULAR MANDREL; AN OUTER TUBULAR MEMBER DISPOSED ABOUT SAID MANDREL FOR LIMITED LONGITUDINAL MOVEMENT RELATIVE THERETO; MEANS RELEASABLY SECURING SAID OUTER TUBULAR MEMBER AGAINST MOVEMENT RELATIVE TO SAID MANDREL; EXPANDABLE SEAL MEANS CARRIED BY SAID OUTER TUBULAR MEMBER, SAID OUTER TUBULAR MEMBER AND SAID MANDREL HAVING COOPERABLE MEANS FOR EXPANDING SAID SEAL MEANS INTO SEALING ENGAGEMENT WITH THE WELL CASING AND LOCKING SAID OUTER TUBULAR MEMBER AGAINST MOVEMENT IN THE WELL CASING, SAID OUTER TUBULAR MEMBER AND SAID MANDREL PROVIDING A BYPASS FLOW PASSAGE EXTENDING PAST SAID SEAL MEANS AND COMMUNICATING WITH THE EXTERIOR OF SAID WELL PACKER ON OPPOSITE ENDS OF SAID MEANS, SAID COOPERABLE MEANS INCLUDING MEANS CARRIED BY SAID OUTER TUBULAR MEMBER EXPOSED TO PRESSURE WITHIN SAID BYPASS FLOW PASSAGE AND MOVABLE OUTWARDLY INTO EXPANDED WELL CASING ENGAGING POSITION BY PRESSURE WITHIN SAID BYPASS FLOW PASSAGE; A CYLINDER SLEEVE CARRIED BY SAID MANDREL AND TELESCOPED IN SPACED RELATION TO OVER AN UPPER
References Cited (Backward Citations)
US2765853A
Cited
US3008523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |