US3324944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miscible oil recovery process
Assignee: Marathon Oil Co
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Filing: 1965-04-22
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Granted: 1967-06-13
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Expires: 1985-04-22
Abstract
No abstract record available.
Inventors
- 👤 Fred H Poettmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:06
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN A PROCESS FOR THE RECOVERY OF CRUDE PETROLEUM FROM OIL-BEARING FORMATIONS WHEREIN FLUIDS ARE INJECTED INTO THE FORMATION THROUGH AT LEAST ONE INJECTION WELL TO DISPLACE THE CRUDE PETROLEUM TOWARD AT LEAST ONE PRODUCTION WELL, THE STEPS COMPRISING INJECTING INTO A SUBTERRANEAN OIL-BEARING FORMATION OF NONPOLAR ORGANIC LIQUID; THEREAFTER INJECTING INTO SAID FORMATION A SOLUBLE OIL; AND FINALLY INJECTING INTO SAID FORMATION A DRIVE FLUID IN AMOUNTS SUFFICIENT TO DISPLACE THE CRUDE PETROLEUM, INJECTED NONPOLAR ORGANIC FLUID AND SOLUBLE OIL TOWARD SAID AT LEAST ONE PRODUCTION WELL; AND RECOVERING CRUDE PETROLEUM THERETHROUGH.
Claim 2
Dependent Claim
93 words
IN A PROCESS FOR THE RECOVERY OF CRUDE PETROLEUM FROM OIL-BEARING FORMATIONS WHEREIN FLUIDS ARE INJECTED INTO THE FORMATION THROUGH AT LEAST ONE INJECTION WELL TO DISPLACE THE CRUDE PETROLEUM TOWARD AT LEAST ONE PRODUCTION WELL, THE STEPS COMPRISING INJECTING INTO A SUBTERRANEAN OIL-BEARING FORMATION OF NONPOLAR ORGANIC LIQUID; THEREAFTER INJECTING INTO SAID FORMATION A SOLUBLE OIL; AND FINALLY INJECTING INTO SAID FORMATION A DRIVE FLUID IN AMOUNTS SUFFICIENT TO DISPLACE THE CRUDE PETROLEUM, INJECTED NONPOLAR ORGANIC FLUID AND SOLUBLE OIL TOWARD SAID AT LEAST ONE PRODUCTION WELL; AND RECOVERING CRUDE PETROLEUM THERETHROUGH.
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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |