US3244228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flooding process for recovery of oil
Assignee: Pan American Petroleum Corp
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Filing: 1962-12-27
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Granted: 1966-04-05
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Expires: 1982-12-27
Abstract
No abstract record available.
Inventors
- 👤 David R Parrish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:31
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN A METHOD FOR RECOVERING PETROLEUM FROM A PREVIOUSLY WATERFLOODED RESERVOIR HAVING AN INJECTION WELL AND A PRODUCING WELL EXTENDING INTO SAID RESERVOIR, THE IMPROVEMENT WHICH COMPRISES INJECTING A SUBSTANTIALLY WATER ND OIL-IMMISCIBLE GAS INTO SAID RESERVOIR VIA SAID INJECTION WELL UNTIL A GAS SATURATION IS ESTABLISHED OF ABOUT 5 PERCENT OF THE PORE VOLUME GREATER THAN THE GAS SATURATION PRIOR TO INJECTION OF SAID GAS INTO THAT PORTION OF SAID RESERVOIR BETWEEN SAID WELLS, THEREAFTER INJECTING WATER INTO SAID FORMATION VIA SAID INJECTION WELL UNTIL A WATER SATURATION IS ESTABLISHED OF FROM ABOUT 5 TO ABOUT 10 PERCENT OF THE PORE VOLUME GREATER THAN THE WATER SATURATION PRIOR TO INJECTION OF WATER INTO THAT PORTION OF SAID RESERVOIR BETWEEN SAID WELLS, WHEREBY PETROLUEM FLOWS INTO SAID PRODUCING WELL, THE GAS SATURATION OF SAID PROTION OF SAID RESERVOIR REMAINING SUBSTANTIALLY CONSTANT DURING THE AFORESAID WATER INJECTION STEP, RECOVERING PETROLEUM FROM SAID PRODUCING WELL, AND REPEATING THE ABOVE CYCLE.
Claim 2
Dependent Claim
158 words
IN A METHOD FOR RECOVERING PETROLEUM FROM A PREVIOUSLY WATERFLOODED RESERVOIR HAVING AN INJECTION WELL AND A PRODUCING WELL EXTENDING INTO SAID RESERVOIR, THE IMPROVEMENT WHICH COMPRISES INJECTING A SUBSTANTIALLY WATER ND OIL-IMMISCIBLE GAS INTO SAID RESERVOIR VIA SAID INJECTION WELL UNTIL A GAS SATURATION IS ESTABLISHED OF ABOUT 5 PERCENT OF THE PORE VOLUME GREATER THAN THE GAS SATURATION PRIOR TO INJECTION OF SAID GAS INTO THAT PORTION OF SAID RESERVOIR BETWEEN SAID WELLS, THEREAFTER INJECTING WATER INTO SAID FORMATION VIA SAID INJECTION WELL UNTIL A WATER SATURATION IS ESTABLISHED OF FROM ABOUT 5 TO ABOUT 10 PERCENT OF THE PORE VOLUME GREATER THAN THE WATER SATURATION PRIOR TO INJECTION OF WATER INTO THAT PORTION OF SAID RESERVOIR BETWEEN SAID WELLS, WHEREBY PETROLUEM FLOWS INTO SAID PRODUCING WELL, THE GAS SATURATION OF SAID PROTION OF SAID RESERVOIR REMAINING SUBSTANTIALLY CONSTANT DURING THE AFORESAID WATER INJECTION STEP, RECOVERING PETROLEUM FROM SAID PRODUCING WELL, AND REPEATING THE ABOVE CYCLE.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |