Patent US3282336A successfully refreshed from Google Patents.
US3282336A
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Production method and apparatus
Assignee: Richfield Oil Corp
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Filing: 1962-09-25
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Granted: 1966-11-01
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Expires: 1982-09-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles E Wakefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:42
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/01; E21B33/00; E21B33/02; E21B33/03; E21B33/035
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
140 words
AN UNDERWATER PRODUCTION SYSTEM FOR PUMPING OIL AND GAS FROM A WELL DRILLED IN A FORMATION UNDERLYING A BODY OF WATER FROM A STRUCTURE OVER THE BODY OF WATER, THROUGH A PRODUCTION HEAD COMPRISING A FIRST TUBULAR MEMBER HAVING A SIDE OUTLET DISPOSED WITHIN BUT FLOW ISOLATED FROM A SECOND TUBULAR MEMBER HAVING A SIDE OUTLET WITH MEANS IN SAID SECOND TUBULAR MEMBER FOR SUPPORTING SAID FIRST TUBULAR MEMBER WITHIN SAID SECOND TUBULAR MEMBER, THE IMPROVEMENT COMPRISING: A DOWNHOLE PUMP POSITIONABLE THROUGH SAID FIRST TUBULAR MEMBER, A VALVED MEMBER CONNECTED TO SAID FIRST TUBULAR MEMBER FOR SHUTTING OFF FLUID FLOW ABOVE SAID FIRST TUBULAR MEMBER, A TUBULAR RISER EXTENDING FROM SAID FIRST TUBULAR MEMBER TO SAID STRUCTURE, AND MEANS FOR RETRIEVING SAID PUMP TO SAID STRUCTURE THROUGH SAID FIRST TUBULAR MEMBER AND SAID RISER WHEN SAID VALVED MEMBER IS OPEN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |