US3072185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved flooding method for the recovery of petroleum
Assignee: Pure Oil Co
•
Filing: 1958-03-17
•
Granted: 1963-01-08
•
Expires: 1978-03-17
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
- 👤 Le Roy W Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:09
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
THE METHOD OF RECOVERING OIL FROM A SUBTERRANEAN FORMATON, INTO WHICH HAVE BEEN DRILLED AT LEAST ONE INJECTION AND ONE PRODUCING WELL, COMPRISING PRODUCING CARBON DIOXIDE IN SITU IN THE FORMATION BY THE COMBUSTION OF A HYDROCARBON WITH AN OXYGEN-CONTAINING GAS INJECTED INTO SAID FORMATION UNTIL AT LEAST ABOUT 500 S.C.F. OF CARBON DIOXIDE PER BARREL OIL IN PLACE HAVE BEEN FORMED, THEREAFTER INJECTING FLOODWATER INTO SAID FORMATION THROUGH THE INJECTION WELL FOR A TIME AND AT A RATE SUFFICIENT TO PRESSURE THE FORMATION TO 700 TO 2500 P.S.I., CONTINUING SAID INJECTION UNTIL WATER BREAKTHROUGH OCCURS AT A PRODUCING WELL, THEN SHUTTING IN THE INJECTION WELL TO RETAIN THE PRESSURE IN THE FORMATION AND PRODUCING ADDITIONAL OIL FROM THE FORMATION THROUGH A PRODUCTION WELL UNDER GRADUAL PRESSURE-DEPLETION CONDITIONS.
Claim 2
Independent Claim
128 words
THE METHOD OF RECOVERING OIL FROM A SUBTERRANEAN FORMATON, INTO WHICH HAVE BEEN DRILLED AT LEAST ONE INJECTION AND ONE PRODUCING WELL, COMPRISING PRODUCING CARBON DIOXIDE IN SITU IN THE FORMATION BY THE COMBUSTION OF A HYDROCARBON WITH AN OXYGEN-CONTAINING GAS INJECTED INTO SAID FORMATION UNTIL AT LEAST ABOUT 500 S.C.F. OF CARBON DIOXIDE PER BARREL OIL IN PLACE HAVE BEEN FORMED, THEREAFTER INJECTING FLOODWATER INTO SAID FORMATION THROUGH THE INJECTION WELL FOR A TIME AND AT A RATE SUFFICIENT TO PRESSURE THE FORMATION TO 700 TO 2500 P.S.I., CONTINUING SAID INJECTION UNTIL WATER BREAKTHROUGH OCCURS AT A PRODUCING WELL, THEN SHUTTING IN THE INJECTION WELL TO RETAIN THE PRESSURE IN THE FORMATION AND PRODUCING ADDITIONAL OIL FROM THE FORMATION THROUGH A PRODUCTION WELL UNDER GRADUAL PRESSURE-DEPLETION CONDITIONS.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |