US2796934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective plugging in oil wells
Assignee: Union Oil Company of California
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Filing: 1954-06-25
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Granted: 1957-06-25
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Expires: 1974-06-25
Abstract
No abstract record available.
Inventors
- 👤 Lee C Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:10
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/5086
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
THE METHOD FOR SELECTIVELY PLUGGING SUBTERRANEAN FORMATIONS PRODUCING OIL AND WATER TRAVERSED BY A WELL BORE TO DECREASE THE PRODUCTION OF WATER THEREFROM WHICH COMPRISES INJECTING INTO SAID FORMATIONS A LIQUID COMPOSITION COMPRISING FURFURYL ALCOHOL, AN ALDEHYDE CAPABLE OF UNDERGOING REACTION WITH SAID ALCOHOL IN THE PRESENCE OF AN ACIDIC CONDENSATION CATALYST TO FORM A SOLID CONDENSATION PRODUCT, AND SUFFICIENT OF AN ACID HAVING AN IONIZATION CONSTANT GREATER THAN 1X10-5 AND BEING AT LEAST FOUR TIMES AS SOLUBLE IN KEROSENE AS IN WATER TO CATALYZE SAID REACTION, SAID LIQUID COMPOSITION HAVING THE PROPERTY OF CONDENSING TO FORM A SOLID PRODUCT MORE RAPIDLY IN THE PRESENCE OF WATER THAN IN THE PRESENCE OF OIL; ALLOWING SAID COMPOSITION TO REMAIN IN SAID FORMATION FOR A PERIOD OF TIME SUFFICIENT FOR SAID COMPOSITION TO RESINIFY IN THE PRESENCE OF WATER BUT INSUFFICIENT FOR RESINIFICATION IN THE PRESENCE OF OIL; AND THEREAFTER PLACING THE WELL IN PRODUCTION.
Claim 2
Independent Claim
153 words
THE METHOD FOR SELECTIVELY PLUGGING SUBTERRANEAN FORMATIONS PRODUCING OIL AND WATER TRAVERSED BY A WELL BORE TO DECREASE THE PRODUCTION OF WATER THEREFROM WHICH COMPRISES INJECTING INTO SAID FORMATIONS A LIQUID COMPOSITION COMPRISING FURFURYL ALCOHOL, AN ALDEHYDE CAPABLE OF UNDERGOING REACTION WITH SAID ALCOHOL IN THE PRESENCE OF AN ACIDIC CONDENSATION CATALYST TO FORM A SOLID CONDENSATION PRODUCT, AND SUFFICIENT OF AN ACID HAVING AN IONIZATION CONSTANT GREATER THAN 1X10-5 AND BEING AT LEAST FOUR TIMES AS SOLUBLE IN KEROSENE AS IN WATER TO CATALYZE SAID REACTION, SAID LIQUID COMPOSITION HAVING THE PROPERTY OF CONDENSING TO FORM A SOLID PRODUCT MORE RAPIDLY IN THE PRESENCE OF WATER THAN IN THE PRESENCE OF OIL; ALLOWING SAID COMPOSITION TO REMAIN IN SAID FORMATION FOR A PERIOD OF TIME SUFFICIENT FOR SAID COMPOSITION TO RESINIFY IN THE PRESENCE OF WATER BUT INSUFFICIENT FOR RESINIFICATION IN THE PRESENCE OF OIL; AND THEREAFTER PLACING THE WELL IN PRODUCTION.
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) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |