Patent US3177939A successfully refreshed from Google Patents.
US3177939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary recovery process using gasliquid drive fluids
Assignee: Pure Oil Co
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Filing: 1963-01-31
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Granted: 1965-04-13
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Expires: 1983-01-31
Abstract
No abstract record available.
Inventors
- 👤 Le Roy W Holm
- 👤 Albert K Csaszar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:53
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE METHOD FOR THE RECOVERY OF PETROLEUM OIL FROM RESERVOIRS CONTAINING WATER IN EXCESS OF ABOUT 0.5 PORE VOLUME AND PETROLEUM COMPRISING FIRST INJECTING THROUGH AN INPUT WELL AND INTO SAID RESERVOIR ABOUT 0.1 TO 0.5 PORE VOLUME OF A GAS HAVING A SOLUBILITY IN PETROLEUM NOT GREATER THAN ABOUT 2% BY WEIGHT, THEN INJECTING 0.03 TO 0.20 PORE VOLUME OF LIQUID C3 TO C10 HYDROCARBON, THEREAFTER INJECTING ABOUT 0.03 TO 0.20 PORE VOLUME OF A LIQUID SOLVENT CAPABLE OF DISSOLVING AT LEAST 10% ITS WEIGHT OF PETROLEUM AND SOLUBLE IN WATER TO AT LEAST 10% OF THE WEIGHT OF THE WATER, DRIVING THE INJECTED MATERIAL THROUGH SAID RESERVOIR BY THE INJECTION OF FLOODWATER AND PRODUCING PETROLEUM FROM AN OUTPUT WELL.
Claim 2
Independent Claim
121 words
THE METHOD FOR THE RECOVERY OF PETROLEUM OIL FROM RESERVOIRS CONTAINING WATER IN EXCESS OF ABOUT 0.5 PORE VOLUME AND PETROLEUM COMPRISING FIRST INJECTING THROUGH AN INPUT WELL AND INTO SAID RESERVOIR ABOUT 0.1 TO 0.5 PORE VOLUME OF A GAS HAVING A SOLUBILITY IN PETROLEUM NOT GREATER THAN ABOUT 2% BY WEIGHT, THEN INJECTING 0.03 TO 0.20 PORE VOLUME OF LIQUID C3 TO C10 HYDROCARBON, THEREAFTER INJECTING ABOUT 0.03 TO 0.20 PORE VOLUME OF A LIQUID SOLVENT CAPABLE OF DISSOLVING AT LEAST 10% ITS WEIGHT OF PETROLEUM AND SOLUBLE IN WATER TO AT LEAST 10% OF THE WEIGHT OF THE WATER, DRIVING THE INJECTED MATERIAL THROUGH SAID 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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |