Patent US2792893A successfully refreshed from Google Patents.
US2792893A
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Selective plugging of subterranean formations
Assignee: Union Oil Company of California
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Filing: 1954-04-26
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Granted: 1957-05-21
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Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard F Keller
- 👤 Theodore J Nowak
- 👤 Paul W Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:58
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/56; C09K8/57; C09K8/575; C09K8/5751; C09K8/5755
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE METHOD OF SELECTIVELY PLUGGING SUBTERREANEAN OIL- AND WATER-PRODUCING FORMATIONS PENETRATED BY A WELL BORE TO REDUCE THE PRODUCTION OF WATER THEREFROM, WHICH COMPRISES INJECTING INTO SAID FORMATIONS A LIQUID COMPRISING AN ALKYLATED PHENOL SOLUBLE IN MINERAL OIL, SUFFICIENT TO PARALDEHYDE TO REACT THEREWITH TO FORM A SOLID CONDENSATION PRODUCT SUBSTANTIALLY INSOLUBLE IN WATER BUT SOLUBLE IN MINERAL OIL, AND AN ACIDIC CONDENSATIONS CATALYST SOLUBLE IN MINERAL OIL; AND HOLDING SAID LIQUID WITHIN SAID FORMATIONS UNTIL SAID CONDENSATION PRODUCT IS FORMED THEREIN IN THE FORM OF A SUBSTANTIALLY CONTINUOUS SOLID PLUG, WHEREBY SAID FORMATIONS ARE RENDERED SUBSTANTIALLY IMPERMEABLE WITH RESPECT TO WATER.
Claim 2
Independent Claim
102 words
THE METHOD OF SELECTIVELY PLUGGING SUBTERREANEAN OIL- AND WATER-PRODUCING FORMATIONS PENETRATED BY A WELL BORE TO REDUCE THE PRODUCTION OF WATER THEREFROM, WHICH COMPRISES INJECTING INTO SAID FORMATIONS A LIQUID COMPRISING AN ALKYLATED PHENOL SOLUBLE IN MINERAL OIL, SUFFICIENT TO PARALDEHYDE TO REACT THEREWITH TO FORM A SOLID CONDENSATION PRODUCT SUBSTANTIALLY INSOLUBLE IN WATER BUT SOLUBLE IN MINERAL OIL, AND AN ACIDIC CONDENSATIONS CATALYST SOLUBLE IN MINERAL OIL; AND HOLDING SAID LIQUID WITHIN SAID FORMATIONS UNTIL SAID CONDENSATION PRODUCT IS FORMED THEREIN IN THE FORM OF A SUBSTANTIALLY CONTINUOUS SOLID PLUG, WHEREBY SAID FORMATIONS ARE RENDERED SUBSTANTIALLY IMPERMEABLE WITH RESPECT TO WATER.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |