Patent FR996626A successfully refreshed from Google Patents.
US3288218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well tools and apparatus
Assignee: Otis Engineering Corp
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Filing: 1963-10-03
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Granted: 1966-11-29
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Expires: 1983-10-03
Abstract
No abstract record available.
Inventors
- 👤 Carter R Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:23
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14; E21B33/00; E21B33/10; E21B33/12; E21B33/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
A WELL APPARATUS INCLUDING: A WELL CASING PASSING THROUGH UPPER AND LOWER PRODUCING ZONES IN A WELL BORE, SAID CASING HAVING UPPER AND LOWER OPENINGS THROUGH WHICH WELL FLUIDS FROM SAID UPPER AND LOWER MEANS IN SAID FLOW INTO THE WELL CASING; A FIRST BARRIER MEANS IN SAID CASING BETWEEN SAID UPPER AND LOWER OPENINGS; A SECOND BARRIER MEANS IN SAID CASING ABOVE SAID UPPER OPENINGS, SAID SECOND BARRIER MEANS INCLUDING A HEAD, SAID HEAD HAVING A PAIR OF LONGITUDINAL PASSAGES THERETHROUGH, SAID HEAD HAVING MEANS IN SAID PASSAGES FOR RELEASABLY SECURING FIRST AND SECOND FLOW CONDUCTORS TO SAID HEAD WHICH EXTEND TO THE SURFACE OF THE WELL, SAID FIRST AND SECOND FLOW CONDUCTORS BEING REMOVABLE UPWARDLY FROM SAID SECOND BARRIER MEANS WHEN RELEASED FROM SAID HEAD, SAID SECOND BARRIER MEANS BEING MOVABLE INTO THE WELL CASING BY MEANS OF ONE OF SAID FLOW CONDUCTORS; A PAIR OF TUBULAR MEANS CONNECTED TO SAID HEAD AND COMMUNICATION WITH SAID PASSAGES FOR CONDUCTING FLUIDS FROM SAID LOWER AND UPPER ZONES INTO SAID FIRST AND SECOND CONDUCTORS, ONE OF SAID TUBULAR MEANS EXTENDING TO SAID FIRST BARRIER MEANS AND COMMUNICATING AT ITS LOWER END WITH SAID WELL CASING
Claim 2
Dependent Claim
195 words
A WELL APPARATUS INCLUDING: A WELL CASING PASSING THROUGH UPPER AND LOWER PRODUCING ZONES IN A WELL BORE, SAID CASING HAVING UPPER AND LOWER OPENINGS THROUGH WHICH WELL FLUIDS FROM SAID UPPER AND LOWER MEANS IN SAID FLOW INTO THE WELL CASING; A FIRST BARRIER MEANS IN SAID CASING BETWEEN SAID UPPER AND LOWER OPENINGS; A SECOND BARRIER MEANS IN SAID CASING ABOVE SAID UPPER OPENINGS, SAID SECOND BARRIER MEANS INCLUDING A HEAD, SAID HEAD HAVING A PAIR OF LONGITUDINAL PASSAGES THERETHROUGH, SAID HEAD HAVING MEANS IN SAID PASSAGES FOR RELEASABLY SECURING FIRST AND SECOND FLOW CONDUCTORS TO SAID HEAD WHICH EXTEND TO THE SURFACE OF THE WELL, SAID FIRST AND SECOND FLOW CONDUCTORS BEING REMOVABLE UPWARDLY FROM SAID SECOND BARRIER MEANS WHEN RELEASED FROM SAID HEAD, SAID SECOND BARRIER MEANS BEING MOVABLE INTO THE WELL CASING BY MEANS OF ONE OF SAID FLOW CONDUCTORS; A PAIR OF TUBULAR MEANS CONNECTED TO SAID HEAD AND COMMUNICATION WITH SAID PASSAGES FOR CONDUCTING FLUIDS FROM SAID LOWER AND UPPER ZONES INTO SAID FIRST AND SECOND CONDUCTORS, ONE OF SAID TUBULAR MEANS EXTENDING TO SAID FIRST BARRIER MEANS AND COMMUNICATING AT ITS LOWER END WITH SAID WELL CASING
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |