US3116791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary recovery of petroleum
Assignee: Union Oil Company of California
•
Filing: 1957-12-10
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Granted: 1964-01-07
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Expires: 1977-12-10
Abstract
No abstract record available.
Inventors
- 👤 Burton B Sandiford
- 👤 Jr Howard F Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:04
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/588
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
METHOD FOR SECONDARY RECOVERY OF OIL FROM A FORMATION BY WATER FLOODING WHICH COMPRISES INTRODUCING INTO AN INPUT WELL PENETRATING THE FORMATION AN AQUEOUS SOLUTION OF AN ETHYLENE OXIDE POLYMER HAVING IN EXCESS OF 10,000 ETHYLENE UNITS PER MOLECULE, WHEREBY TO FORM A FLOOD FRONT OF RELATIVELY VISCOUS LIQUID, THEREAFTER INTRODUCING WATER INTO SAID INPUT WELL AND FORCING FLUID THROUGH THE FORMATION TOWARD AN OUTPUT WELL, AND WITHDRAWING FLUID INCLUDING OIL FROM THE OUTPUT WELL.
Claim 2
Dependent Claim
75 words
METHOD FOR SECONDARY RECOVERY OF OIL FROM A FORMATION BY WATER FLOODING WHICH COMPRISES INTRODUCING INTO AN INPUT WELL PENETRATING THE FORMATION AN AQUEOUS SOLUTION OF AN ETHYLENE OXIDE POLYMER HAVING IN EXCESS OF 10,000 ETHYLENE UNITS PER MOLECULE, WHEREBY TO FORM A FLOOD FRONT OF RELATIVELY VISCOUS LIQUID, THEREAFTER INTRODUCING WATER INTO SAID INPUT WELL AND FORCING FLUID THROUGH THE FORMATION TOWARD AN OUTPUT WELL, AND WITHDRAWING FLUID INCLUDING OIL FROM THE OUTPUT WELL.
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) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |