US3208518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delayed viscous waterflooding
Assignee: Jersey Production Research Co
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Filing: 1961-07-31
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Granted: 1965-09-28
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 John T Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:29
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/90; C09K8/905; C09K8/58; C09K8/588
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS FOR RECOVERING CRUDE OIL FROM A SUBSURFACE OIL-BEARING RESERVOIR WHICH COMPRISES PREPARING AN AQUEOUS SOLUTION OF A HIGH MOLECULAR WEIGHT IONIC POLYMER, SAID SOLUTION HAVING A VISCOSITY AT THE PH OF SAID RESERVOIR IN EXCESS OF THAT OF WATER; ADJUSTING THE PH OF SAID SOLUTION TO OBTAIN A VISCOSITY BELOW THAT OF SAID SOLUTION AT THE PH OF SAID RESERVOIR; INJECTING SAID SOLUTION INTO SAID RESERVOIR AT THE REDUCED VISCOSITY THROUGH AT LEAST ONE INJECTION WELL PENETRATING SAID RESERVOIR; AND RECOVERING CRUDE OIL DISPLACED BY SAID SOLUTION THROUGH AT LEAST ONE PRODUCTION WELL PENETRATING SAID RESERVOIR.
Claim 2
Dependent Claim
98 words
A PROCESS FOR RECOVERING CRUDE OIL FROM A SUBSURFACE OIL-BEARING RESERVOIR WHICH COMPRISES PREPARING AN AQUEOUS SOLUTION OF A HIGH MOLECULAR WEIGHT IONIC POLYMER, SAID SOLUTION HAVING A VISCOSITY AT THE PH OF SAID RESERVOIR IN EXCESS OF THAT OF WATER; ADJUSTING THE PH OF SAID SOLUTION TO OBTAIN A VISCOSITY BELOW THAT OF SAID SOLUTION AT THE PH OF SAID RESERVOIR; INJECTING SAID SOLUTION INTO SAID RESERVOIR AT THE REDUCED VISCOSITY THROUGH AT LEAST ONE INJECTION WELL PENETRATING SAID RESERVOIR; AND RECOVERING CRUDE OIL DISPLACED BY SAID SOLUTION THROUGH AT LEAST ONE PRODUCTION WELL PENETRATING 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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |