US3111985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary recovery method
Assignee: Shell USA Inc
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Filing: 1960-03-25
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Granted: 1963-11-26
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Expires: 1980-03-25
Abstract
No abstract record available.
Inventors
- 👤 Reisberg Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:07
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A SECONDARY RECOVERY PROCESS IN WHICH AT LEAST ONE INJECTION WELL AND AT LEAST ONE PRODUCING WELL PENETRATE AN OIL-BEARING FORMATION, AND IN WHICH A SURFACTANTFORMING ACID DISSOLVED IN AN OIL-MISCIBLE CARRIER LIQUID AND AN AQUEOUS PHASE CONTAINING A BASIC-ACTING COMPOUND CAPABLE OF NEUTRALIZING SAID ACID TO FORM SAID SURFACTANT ARE INTRODUCED SUCCESSIVELY INTO THE FORMATION TO FORM THE SURFACTANT IN SITU, SAID AQUEOUS PHASE AND SAID SURFACTANT CAUSING THE FORMATION OF AN OIL-IN-WATER EMULSION OF SAID FORMATION OIL, WHCH EMULSION IS THEN FORCED BY SAID AQUEOUS PHASE TO THE PRODUCING WELL, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN SAID AQUEOUS PHASE A VISCOSITY-ENHANCING AGENT IN SUCH AN AMOUNT THAT THE RATIO OF THE VISCOSITY OF THE OIL-MIXCIBLE CARRIER LIQUID TO THE AQUEOUS PHASE VISCOSITY IS LESS THAN ABOUT 15 TO 1.
Claim 2
Dependent Claim
132 words
IN A SECONDARY RECOVERY PROCESS IN WHICH AT LEAST ONE INJECTION WELL AND AT LEAST ONE PRODUCING WELL PENETRATE AN OIL-BEARING FORMATION, AND IN WHICH A SURFACTANTFORMING ACID DISSOLVED IN AN OIL-MISCIBLE CARRIER LIQUID AND AN AQUEOUS PHASE CONTAINING A BASIC-ACTING COMPOUND CAPABLE OF NEUTRALIZING SAID ACID TO FORM SAID SURFACTANT ARE INTRODUCED SUCCESSIVELY INTO THE FORMATION TO FORM THE SURFACTANT IN SITU, SAID AQUEOUS PHASE AND SAID SURFACTANT CAUSING THE FORMATION OF AN OIL-IN-WATER EMULSION OF SAID FORMATION OIL, WHCH EMULSION IS THEN FORCED BY SAID AQUEOUS PHASE TO THE PRODUCING WELL, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN SAID AQUEOUS PHASE A VISCOSITY-ENHANCING AGENT IN SUCH AN AMOUNT THAT THE RATIO OF THE VISCOSITY OF THE OIL-MIXCIBLE CARRIER LIQUID TO THE AQUEOUS PHASE VISCOSITY IS LESS THAN ABOUT 15 TO 1.
References Cited (Backward Citations)
US2288857A
Cited
US2827964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |