US3033288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary recovery of oil from underground reservoirs
Assignee: Pure Oil Co
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Filing: 1958-12-29
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Granted: 1962-05-08
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Expires: 1978-12-29
Abstract
No abstract record available.
Inventors
- 👤 Leroy W Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:17
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD FOR RECOVERING PETROLEUM FROM A NATURAL UNDERGROUND RESERVOIR CONTAINING PETROLEUM AND WATER HAVING A TOTAL SALT CONTENT OF LESS THAN ABOUT 6% BY WEIGHT COMPRISING INJECTING INTO SAID RESERVIOR THROUGH AN INJECTION WELL ABOUT 0.1 RESVIOR PORE VOLUME OF BRINE HAVING A TOTAL SALT CONTENT OF NOT LESS THAN ABOUT 10% BY WEIGHT, INJECTING BEHIND SAID BRINE ABOUT 0.1 RESERVOIR PORE VOLUME OF FLUID SOLUBLE IN BOTH PETROLEUM AND FRESH WATER BUT SUBSTANTIALLY INSOLUBLE IN SAID BRINE, INJECTING WATER BEHIND SAID FLUID TO DRIVE SAID FLUID TOWARDS A PRODUCING WELL, AND PRODUCING PETROLEUM FROM THE PRODUCING WELL.
Claim 2
Independent Claim
99 words
A METHOD FOR RECOVERING PETROLEUM FROM A NATURAL UNDERGROUND RESERVOIR CONTAINING PETROLEUM AND WATER HAVING A TOTAL SALT CONTENT OF LESS THAN ABOUT 6% BY WEIGHT COMPRISING INJECTING INTO SAID RESERVIOR THROUGH AN INJECTION WELL ABOUT 0.1 RESVIOR PORE VOLUME OF BRINE HAVING A TOTAL SALT CONTENT OF NOT LESS THAN ABOUT 10% BY WEIGHT, INJECTING BEHIND SAID BRINE ABOUT 0.1 RESERVOIR PORE VOLUME OF FLUID SOLUBLE IN BOTH PETROLEUM AND FRESH WATER BUT SUBSTANTIALLY INSOLUBLE IN SAID BRINE, INJECTING WATER BEHIND SAID FLUID TO DRIVE SAID FLUID TOWARDS A PRODUCING WELL, AND PRODUCING PETROLEUM FROM THE PRODUCING WELL.
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) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |