US3083768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for multiple zone well production
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1956-02-20
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Granted: 1963-04-02
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Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 Jr William S Althouse
- 👤 Jr Hiram H Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:31
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
IN MULTIPLE ZONE WELL PRODUCTION APPARATUS: A WELL CASING PASSING THROUGH UPPER AND LOWER PRODUCING ZONES IN A WELL BORE AND HAVING UPPER AND LOWER OPENINGS THROUGH WHICH PRODUCTION FROM SAID UPPER AND LOWER ZONES CAN FLOW INTO THE WELL CASING; LOWER BARRIER MEANS IN SAID CASING BETWEEN SAID UPPER AND LOWER OPENINGS; UPPER BARRIER MEANS IN SAID CASING ABOVE SAID UPPER OPENINGS; A HEAD ABOVE SAID UPPER BARRIER MEANS AND HAVING A PLURALITY OF LONGITUDINAL PASSAGES THERETHROUGH; A FIRST TUBULAR STRING COMMUNICATING WITH ONE OF SAID PASSAGES AND EXTENDING TO THE TOP OF THE CASING; A SECOND TUBULAR STRING COMMUNICATING WITH THE OTHER OF SAID PASSAGES AND EXTENDING TO THE TOP OF THE CASING; INNER TUBULAR MEANS ENGAGING SAID HEAD AND LOWER BARRIER MEANS AND EXTENDING THROUGH SAID UPPER BARRIER MEANS TO SAID ONE PASSAGE TO CONDUCT FLUID FROM THE LOWER ZONE INTO SAID FIRST TUBULAR STRING; AND OUTER TUBULAR MEANS SURROUNDING SAID INNER TUBULAR MEANS AND ENGAGING SAID HEAD AND UPPER
Claim 2
Dependent Claim
163 words
IN MULTIPLE ZONE WELL PRODUCTION APPARATUS: A WELL CASING PASSING THROUGH UPPER AND LOWER PRODUCING ZONES IN A WELL BORE AND HAVING UPPER AND LOWER OPENINGS THROUGH WHICH PRODUCTION FROM SAID UPPER AND LOWER ZONES CAN FLOW INTO THE WELL CASING; LOWER BARRIER MEANS IN SAID CASING BETWEEN SAID UPPER AND LOWER OPENINGS; UPPER BARRIER MEANS IN SAID CASING ABOVE SAID UPPER OPENINGS; A HEAD ABOVE SAID UPPER BARRIER MEANS AND HAVING A PLURALITY OF LONGITUDINAL PASSAGES THERETHROUGH; A FIRST TUBULAR STRING COMMUNICATING WITH ONE OF SAID PASSAGES AND EXTENDING TO THE TOP OF THE CASING; A SECOND TUBULAR STRING COMMUNICATING WITH THE OTHER OF SAID PASSAGES AND EXTENDING TO THE TOP OF THE CASING; INNER TUBULAR MEANS ENGAGING SAID HEAD AND LOWER BARRIER MEANS AND EXTENDING THROUGH SAID UPPER BARRIER MEANS TO SAID ONE PASSAGE TO CONDUCT FLUID FROM THE LOWER ZONE INTO SAID FIRST TUBULAR STRING; AND OUTER TUBULAR MEANS SURROUNDING SAID INNER TUBULAR MEANS AND ENGAGING SAID HEAD AND UPPER
References Cited (Backward Citations)
US203044A
Cited
US381013A
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US1014272A
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US2335355A
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US2368428A
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US2665759A
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US2605637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |