US3160208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production well assembly for in situ combustion
Assignee: Shell USA Inc
•
Filing: 1961-10-06
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Granted: 1964-12-08
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Expires: 1981-10-06
Abstract
No abstract record available.
Inventors
- 👤 Robert M Jorda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:32
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/001
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
155 words
A PRODUCTION WELL HEAD ASSEMBLY FOR USE IN AN UNDERGROUND COMBUSTION SYSTEM FOR RECOVERING PETROLEUM PRODUCTS FROM EARTH FORMATIONS, SAID ASSEMBLY COMPRISING A WELL CASING EXTENDING INTO A WELL TO A POINT ADJACENT AN OIL BEARING FORMATION TO BE PRODUCED, MEANS FIXEDLY POSITIONING SAID CASING IN SAID WELL, A COOLING WATER JACKET FORMED AROUND THE INSIDE OF SAID WELL CASING AT LEAST OVER THAT PORTION OF THE CASIG ADJACENT THE FORMATION TO BE PRODUCED WHEREBY AN ANNULAR SPACE IS FORMED AROUND THE INSIDE OF THE CASING WHICH FORMS ONE WALL OF SAID COOLING WATER JACKET, SAID CASING HAVING PORT MEANS IN OPEN COMMUNICATION BETWEEN THE INTERIOR AND THE EXTERIOR OF THE WELL CASING AT A POINT ADJACENT SAID FORMATION TO BE PRODUCED, CLOSURE MEANS CLOSING THE CASING AT THE TOP THEREOF, CONDUIT MEANS IN SAID WELL AND EXTENDING OUT OF THE TOP THEREOF FOR PRODUCING HYDROCARBONS THEREFROM, AND COOLING WATER CONDUIT MEANS EXTENDING FROM THE
References Cited (Backward Citations)
US1547240A
Cited
US3013609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-08 | 1968-06-08 | 1968-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-08 | 1972-06-08 | 1972-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-08 | 1976-06-08 | 1976-12-08 | $7700.00 | Window Closed / Lapsed |