Patent US3207217A successfully refreshed from Google Patents.
US3207217A
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Miscible drive-waterflooding process
Assignee: Pure Oil Co
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Filing: 1963-08-12
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Granted: 1965-09-21
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Expires: 1983-08-12
Abstract
No abstract record available.
Inventors
- 👤 Byron B Woertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:31
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A METHOD FOR PRODUCTION OF OIL FROM A SUBTERRANEAN RESERVOIR CONSISTING ESSENTIALLY OF INJECTING THROUGH AN INJECTION WELL INTO SAID RESERVOIR A QUANTITY OF LOW-MOLECULAR-WEIGHT HYDROCARBON, LIQUID UNDER RESERVOIR CONDITIONS, INJECTING IMMEDIATELY BEHIND SAID HYDROCARBON A QUANTITY OF CARBON DIOXIDE, DRIVING THE HYDROCARBON LIQUID AND CARBON DIOXIDE THROUGH THE RESERVOIR BY INJECTION OF FLOODWATER IN THE DIRECTION OF AN OUTPUT WELL, AND MAINTAINING THE RESERVOIR AT A PRESSURE OF AT LEAST 700 POUNDS PER SQUARE INCH.
Claim 2
Independent Claim
76 words
A METHOD FOR PRODUCTION OF OIL FROM A SUBTERRANEAN RESERVOIR CONSISTING ESSENTIALLY OF INJECTING THROUGH AN INJECTION WELL INTO SAID RESERVOIR A QUANTITY OF LOW-MOLECULAR-WEIGHT HYDROCARBON, LIQUID UNDER RESERVOIR CONDITIONS, INJECTING IMMEDIATELY BEHIND SAID HYDROCARBON A QUANTITY OF CARBON DIOXIDE, DRIVING THE HYDROCARBON LIQUID AND CARBON DIOXIDE THROUGH THE RESERVOIR BY INJECTION OF FLOODWATER IN THE DIRECTION OF AN OUTPUT WELL, AND MAINTAINING THE RESERVOIR AT A PRESSURE OF AT LEAST 700 POUNDS PER SQUARE INCH.
References Cited (Backward Citations)
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |