Patent US3175609A successfully refreshed from Google Patents.
US3175609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary recovery process with gas-liquid drive agents
Assignee: Pure Oil Co
•
Filing: 1961-06-19
•
Granted: 1965-03-30
•
Expires: 1981-06-19
Abstract
No abstract record available.
Inventors
- 👤 Albert K Csaszar
- 👤 Le Roy W Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:46
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A METHOD FOR THE RECOVERY OF PETROLEUM OIL FROM RESERVOIRS CONTAINING WATER IN EXCESS OF ABOUT 0.5 PORE VOLUME AND PETROLEUM COMPRISING INJECTING THROUGH AN INPUT WELL INTO SAID RESERVOIR ABOUT 0.1 TO 0.2 PORE VOLUME OF A GAS HAVING A SOLUBILITY IN PETROLEUM NOT GREATER THAN ABOUT 2% BY WEIGHT, IMMEDIATELY THEREAFTER INJECTING ABOUT 0.03 TO 0.20 PORE VOLUME OF A LIQUID SOLVENT CAPABLE OF DISSOLVING AT LEAST ABOUT 10% ITS WEIGHT OF PETROLEUM AND SOLUBLE IN WATER TO AT LEAST THE EXTENT OF 10% OF THE WEIGHT OF THE WATER, DRIVING SAID SOLVENT THROUGH THE RESERVOIR BY THE INJECTION OF FLOODWATER, AND PRODUCING PETROLEUM FROM AN OUTPUT WELL.
Claim 2
Independent Claim
110 words
A METHOD FOR THE RECOVERY OF PETROLEUM OIL FROM RESERVOIRS CONTAINING WATER IN EXCESS OF ABOUT 0.5 PORE VOLUME AND PETROLEUM COMPRISING INJECTING THROUGH AN INPUT WELL INTO SAID RESERVOIR ABOUT 0.1 TO 0.2 PORE VOLUME OF A GAS HAVING A SOLUBILITY IN PETROLEUM NOT GREATER THAN ABOUT 2% BY WEIGHT, IMMEDIATELY THEREAFTER INJECTING ABOUT 0.03 TO 0.20 PORE VOLUME OF A LIQUID SOLVENT CAPABLE OF DISSOLVING AT LEAST ABOUT 10% ITS WEIGHT OF PETROLEUM AND SOLUBLE IN WATER TO AT LEAST THE EXTENT OF 10% OF THE WEIGHT OF THE WATER, DRIVING SAID SOLVENT THROUGH THE RESERVOIR BY THE INJECTION OF FLOODWATER, AND PRODUCING PETROLEUM FROM AN OUTPUT 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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |