US2839141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for oil recovery with "in situ" combustion
Assignee: Worthington Corp
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Filing: 1956-01-30
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Granted: 1958-06-17
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Expires: 1976-01-30
Abstract
No abstract record available.
Inventors
- 👤 Walter Hellmuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:59
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
THE METHOD OF RECOVERING OIL FROM AN OIL BEARING FORMATION HAVING AT LEAST ONE INPUT WELL AND A PRODUCING WELL THEREIN IN SPACED RELATION TO EACH OTHER WHICH CONSISTS IN GENERATING AT THE SURFACE ABOVE SAID OIL BEARING FORMATION A HEAT CARRYING AND DRIVING MEDIUM AT PRESSURES LOWER THAN THE SEPARATION PRESSURE OF THE OVERBURDEN AND TEMPERATURES BETWEEN 400*F. AND 800*F. AND HAVING A COMPOSITION INCLUDING SUPERHEATED STEAM BETWEEN 30 AND 50 PERCENT BY WEIGHT OF THE MEDIUM AND OXYGEN IN EXCESS OF 6 PERCENT BY WEIGHT OF THE MEDIUM, CONTINUOUSLY INJECTING SAID MEDIUM DOWN SAID INPUT WELL TO PROGRESSIVELY DRIVE RESIDUAL OIL IN SAID FORMATION TOWARDS SAID PRODUCING WELL AND TO SIMULTANEOUSLY AND PROGRESSIVELY HEAT SAID FORMATION BETWEEN SAID INPUT WELL AND SAID PRODUCING WELL BETWEEN 400*F. TO 800*F. UNTIL AN EXOTHERMIC REACTION WILL OCCUR BETWEEN OXYGEN AND HYDROCARBON MATTER IN SAID HEATED PORTIONS TO DELIVER ADDITIONAL HEAT TO SAID HEAT CARRYING AND DRIVING MEDIUM. AND RECOVERING OIL FROM SAID PRODUCING WELL.
Claim 2
Independent Claim
163 words
THE METHOD OF RECOVERING OIL FROM AN OIL BEARING FORMATION HAVING AT LEAST ONE INPUT WELL AND A PRODUCING WELL THEREIN IN SPACED RELATION TO EACH OTHER WHICH CONSISTS IN GENERATING AT THE SURFACE ABOVE SAID OIL BEARING FORMATION A HEAT CARRYING AND DRIVING MEDIUM AT PRESSURES LOWER THAN THE SEPARATION PRESSURE OF THE OVERBURDEN AND TEMPERATURES BETWEEN 400*F. AND 800*F. AND HAVING A COMPOSITION INCLUDING SUPERHEATED STEAM BETWEEN 30 AND 50 PERCENT BY WEIGHT OF THE MEDIUM AND OXYGEN IN EXCESS OF 6 PERCENT BY WEIGHT OF THE MEDIUM, CONTINUOUSLY INJECTING SAID MEDIUM DOWN SAID INPUT WELL TO PROGRESSIVELY DRIVE RESIDUAL OIL IN SAID FORMATION TOWARDS SAID PRODUCING WELL AND TO SIMULTANEOUSLY AND PROGRESSIVELY HEAT SAID FORMATION BETWEEN SAID INPUT WELL AND SAID PRODUCING WELL BETWEEN 400*F. TO 800*F. UNTIL AN EXOTHERMIC REACTION WILL OCCUR BETWEEN OXYGEN AND HYDROCARBON MATTER IN SAID HEATED PORTIONS TO DELIVER ADDITIONAL HEAT TO SAID HEAT CARRYING AND DRIVING MEDIUM. AND RECOVERING OIL FROM SAID PRODUCING WELL.
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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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |