Patent US3357487A successfully refreshed from Google Patents.
US3357487A
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Method of oil recovery with a hot driving fluid
Assignee: Phillips Petroleum Co
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Filing: 1965-08-26
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Granted: 1967-12-12
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Expires: 1985-08-26
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Gilchrist
- 👤 Emery M Craighead
- 👤 Donald O Hitzman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:01
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/592; E; E21; E21B; E21B43/00; E21B43/16; E21B43/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
132 words
A PROCESS FOR PRODUCING OIL FROM AN OIL-BEARING STRATUM PENETRATED BY A WELL WHICH COMPRISES THE STEPS OF: (1) INJECTING THRU SAID WELL INTO THE SURROUNDING STRATUM A SLUG OF A SURFACTANT STABLE AT TEMPERATURES UP TO AT LEAST 650*F. DISSOLVED IN AN OIL SOLVENT, THE CONCENTRATION OF SAID SURFACTANT BEING IN THE RANGE OF 0.01 TO 5 WEIGHT PERCENT AND SAID SLUG BEING IN THE RANGE OF 0.1 TO 10 PERCENT OF THE OIL PORE VOLUME; (2) INJECTING INTO SAID STRATUM THRU SAID WELL HOT AQUEOUS DRIVING FLUID SUBSTANTIALLY FREE OF SURFACTANT SO AS TO MOVE SAID SLUG A SUBSTANTIAL DISTANCE INTO SAID STRATUM FROM SAID WELL; (3) THEREAFTER MOVING SAID SLUG THRU SAID STRATUM TOWARD A PRODUCTION WELL SO AS TO DISPLACE OIL THEREINTO; AND (4) RECOVERING THE PRODUCED OIL.
References Cited (Backward Citations)
US2288857A
Cited
GB511768A
Cited
US2813583A
Cited
US3115929A
Cited
US3259186A
Cited
US3204694A
Cited
US3292702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |