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US3326286A
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Oil recovery in water flooding
Assignee: Phillips Petroleum Co
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Filing: 1965-04-19
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Granted: 1967-06-20
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Expires: 1985-04-19
Abstract
No abstract record available.
Inventors
- 👤 Robert R Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:31
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A PROCESS FOR PRODUCING OIL FROM AN OIL-BEARING STRATUM COMPRISING TGHE STEPS OF: (1) INJECTING INTO SAID STRATUM THRU A WELL THEREIN AN AQUEOUS SLUG CONTAINING A NON-IONIC SURFACTANT IN SOLUTION THEREIN IN A CONCENTRATION IN THE RANGE OF ABOUT 0.001 TO 2.5 WEIGHT PERCENT AND DEAD CELLS SELECTED FROM THE GROUP CONSISTING OF BACTERIA AND YEASTS IN A CONCENTRATION IN THE RANGE OF ABOUT 0.01 TO 0.5 WEIGHT PERCENT, SAID SURFACTANT BEING SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE OXIDE ETHERS AND THIOETHERS HAVING AN AVERAGE CHAIN LENGTH ON THE HYDROPHILIC END IN THE RANGE OF ABOUT 4 TO 6.5 MOLES; (2) DRIVING THE SLUG OF (1) INTO SAID STRATUM AWAY FROM SAID WELL SO AS TO DISPLACE OIL FROM A SECTION OF SAID STRATUM; (3) DRIVING THE DISPLACED OIL INTO A WELL IN SAID STRATUM; AND (4) PRODUCING THE OIL FROM LAST SAID WELL.
Claim 2
Dependent Claim
146 words
A PROCESS FOR PRODUCING OIL FROM AN OIL-BEARING STRATUM COMPRISING TGHE STEPS OF: (1) INJECTING INTO SAID STRATUM THRU A WELL THEREIN AN AQUEOUS SLUG CONTAINING A NON-IONIC SURFACTANT IN SOLUTION THEREIN IN A CONCENTRATION IN THE RANGE OF ABOUT 0.001 TO 2.5 WEIGHT PERCENT AND DEAD CELLS SELECTED FROM THE GROUP CONSISTING OF BACTERIA AND YEASTS IN A CONCENTRATION IN THE RANGE OF ABOUT 0.01 TO 0.5 WEIGHT PERCENT, SAID SURFACTANT BEING SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE OXIDE ETHERS AND THIOETHERS HAVING AN AVERAGE CHAIN LENGTH ON THE HYDROPHILIC END IN THE RANGE OF ABOUT 4 TO 6.5 MOLES; (2) DRIVING THE SLUG OF (1) INTO SAID STRATUM AWAY FROM SAID WELL SO AS TO DISPLACE OIL FROM A SECTION OF SAID STRATUM; (3) DRIVING THE DISPLACED OIL INTO A WELL IN SAID STRATUM; AND (4) PRODUCING THE OIL FROM LAST SAID WELL.
References Cited (Backward Citations)
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Cited
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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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |