US3082822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary recovery waterflood process
Assignee: Pure Oil Co
•
Filing: 1959-11-19
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Granted: 1963-03-26
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Expires: 1979-11-19
Abstract
No abstract record available.
Inventors
- 👤 Le Roy W Holm
- 👤 George G Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:03
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A METHOD FOR RECOVERING PETROLEUM OIL FROM A SUBTERRANEAN RESERVOIR COMPRISING INJECTING THROUGH AN INPUT WELL AND INTO SAID RESERVOIR A QUANTITY OF LIQUID HYDROCARBON SOLVENT EQUIVALENT TO 0.005 TO 0.20 RESERVOIR PORE VOLUME, SAID SOLVENT BEING MIXCIBLE WITH THE PETROLEUM OIL, SUBSTANTIALLY INSOLUBLE IN WATER, HAVING A VISCOSITY AT LEAST 20% LOWER THAN THE VISCOSITY OF SAID PETROLEUM OIL, AND CONTAINING IN SOLUTION ABOUT 0.1 TO ABOUT 3.0% BY VOLUME OF A LIQUID SURFACTANT WHICH IS SOLUBLE IN SAID PEROLEUM OIL AND SUBSTANTIALLY INSOLUBLE IN WATER, INJECTING FLOODWATER THROUGH SAID INPUT WELL AND INTO SAID FORMATION TO DRIVE SAID SOLVENT THEREBETWEEN TOWARD A PRODUCING WELL, AND RECOVERING RESERVOIR FLUIDS FROM AID PRODUCING WELL.
Claim 2
Independent Claim
114 words
A METHOD FOR RECOVERING PETROLEUM OIL FROM A SUBTERRANEAN RESERVOIR COMPRISING INJECTING THROUGH AN INPUT WELL AND INTO SAID RESERVOIR A QUANTITY OF LIQUID HYDROCARBON SOLVENT EQUIVALENT TO 0.005 TO 0.20 RESERVOIR PORE VOLUME, SAID SOLVENT BEING MIXCIBLE WITH THE PETROLEUM OIL, SUBSTANTIALLY INSOLUBLE IN WATER, HAVING A VISCOSITY AT LEAST 20% LOWER THAN THE VISCOSITY OF SAID PETROLEUM OIL, AND CONTAINING IN SOLUTION ABOUT 0.1 TO ABOUT 3.0% BY VOLUME OF A LIQUID SURFACTANT WHICH IS SOLUBLE IN SAID PEROLEUM OIL AND SUBSTANTIALLY INSOLUBLE IN WATER, INJECTING FLOODWATER THROUGH SAID INPUT WELL AND INTO SAID FORMATION TO DRIVE SAID SOLVENT THEREBETWEEN TOWARD A PRODUCING WELL, AND RECOVERING RESERVOIR FLUIDS FROM AID 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) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |