US2954825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water flooding process wherein thickening agent formed in situ
Assignee: Pure Oil Co
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Filing: 1957-12-24
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Granted: 1960-10-04
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Expires: 1977-12-24
Abstract
No abstract record available.
Inventors
- 👤 George G Bernard
- 👤 Nathaniel L Remes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:26
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A SECONDARY RECOVERY, WATER-FLOODING PROCESS FOR THE RECOVERY OF RESIDUAL PETROLEUM OIL FROM PARTIALLY DEPLETED RESERVOIRS TRAVERSED BY AN INJECTION WELL AND A PRODUCING WELL WHICH COMPRISES INTRODUCING INTO SAID RESERVOIR THROUGH SAID INJECTION WELL AS AN AQUEOUS ADMIXTURE CONTAINING AT LEAST ONE AMINE MONOMER SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINES CAPABLE OF REACTION WITH CARBON DIOXIDE TO FORM A SUBSTITUTED AMMONIUM CARBAMATE, PASSING GASEOUS CARBON DIOXIDE THROUGH SAID ADMIXTURE IN AN AMOUNT SUFFICIENT TO REACT WITH SAID AMINE TO FORM A WATER-SOLUBLE, SUBSTITUTED AMMONIUM CARBAMATE WHICH IS STABLE AT FORMATION CONDITIONS, WHEREBY THE VISCOSITY OF SAID AQUEOUS ADMIXTURE IS INCREASED, AND THEREAFTER INTRODUCING UNTHICKENED WATER INTO SAID RESERVOIR AND FORCING SAID AQUEOUS ADMIXTURE AND WATER THROUGH SAID RESERVOIR.
Claim 2
Dependent Claim
123 words
A SECONDARY RECOVERY, WATER-FLOODING PROCESS FOR THE RECOVERY OF RESIDUAL PETROLEUM OIL FROM PARTIALLY DEPLETED RESERVOIRS TRAVERSED BY AN INJECTION WELL AND A PRODUCING WELL WHICH COMPRISES INTRODUCING INTO SAID RESERVOIR THROUGH SAID INJECTION WELL AS AN AQUEOUS ADMIXTURE CONTAINING AT LEAST ONE AMINE MONOMER SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINES CAPABLE OF REACTION WITH CARBON DIOXIDE TO FORM A SUBSTITUTED AMMONIUM CARBAMATE, PASSING GASEOUS CARBON DIOXIDE THROUGH SAID ADMIXTURE IN AN AMOUNT SUFFICIENT TO REACT WITH SAID AMINE TO FORM A WATER-SOLUBLE, SUBSTITUTED AMMONIUM CARBAMATE WHICH IS STABLE AT FORMATION CONDITIONS, WHEREBY THE VISCOSITY OF SAID AQUEOUS ADMIXTURE IS INCREASED, AND THEREAFTER INTRODUCING UNTHICKENED WATER INTO SAID RESERVOIR AND FORCING SAID AQUEOUS ADMIXTURE AND WATER THROUGH SAID RESERVOIR.
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) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |