US3770649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flooding with miscible type fluid slugs having different brine tolerances
Assignee: Marathon Oil Co
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Filing: 1971-07-09
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Granted: 1973-11-06
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Expires: 1991-07-09
Abstract
Abstract MICELLAR DISPERSIONS USEFUL IN FLOODING SUBTERREANEAN FORMATIONS AND DESIRABLY HAVING A PARTICULAR BRINE TOLERANCE PERMITTED BY THE COMPONENTS WITHIN THE MICELLAR DISPERSION ARE OBTAINED BY UTILIZING LOW AVERAGE EQUIVALENT WEIGHT SURFACTANTS TO OBTAIN A HIGH BRINE TOLERANCE AND INCREASING AVERAGE EQUIVALENT WEIGHT SURFACTANT TO OBTAIN LOWER BRINE TOLERANCES. THESE DISPERSIONS ARE INJECTED AND DISPLACED THROUGH THE FORMATION TO GIVE IMPROVED OIL RECOVERIES.
Inventors
- 👤 D Burdge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:38
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |