US2799341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective plugging in oil wells
Assignee: Union Oil Company of California
•
Filing: 1955-03-04
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Granted: 1957-07-16
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Expires: 1975-03-04
Abstract
No abstract record available.
Inventors
- 👤 George P Maly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:37
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138; C; C09; C09K; C09K8/00; C09K8/50; C09K8/516
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
THE METHOD OF PLUGGING A SUBTERRANEAN FORMATION COMPRISING A PLURALITY OF CLOSELY ASSOCIATED VERTICALLY SPACED WATER-BEARING AND OIL-BEARING STRATA COMMUNICATING WITH A WELL BORE WHICH COMPRISES (1) INJECTING INTO BOTH OF SAID TYPES OF STRATE A HEATED WATER-MISCIBLE OIL-IMMISCIBLE LIQUID UNDER A PRESSURE SUFFICIENT TO FORCE SAID LIQUID INTO THE WATER-BEARING STRATA FOR AN ARBITRARY DISTANCE BACK FROM SAID BORE BUT INSUFFICIENT TO FORCE SAID LIQUID AN EQUAL DISTANCE INTO THE OIL-BEARING STRATA; (2) ALLOWING SAID LIQUID TO REMAIN IN AND TRANSFER HEAT TO SAID STRATA, WHEREBY THERE ARE FORMED HEATED ZONES IMMEDIATELY ADJACENT TO AND EXTENDING ALONG THE LENGTH OF SAID STRATA, THE HEATED ZONES IMMEDIATELY ADJECENT FOR OILTHE WATER-BEARING STRATA EXTENDING FARTHER INTO THE FORMATION THAN THE HEATED ZONES IMMEDIATELY ADJACENT THE OILBEARING STRATA; (3) WITHDRAWING SAID LIQUID FROM SAID STRATA; (4) INJECTING INTI THE SAID STRATA A LIQUID COMPOSITION CAPABLE OF FORMING THEREIN A WATER-INSOLUBLE SOLID
Claim 2
Independent Claim
149 words
THE METHOD OF PLUGGING A SUBTERRANEAN FORMATION COMPRISING A PLURALITY OF CLOSELY ASSOCIATED VERTICALLY SPACED WATER-BEARING AND OIL-BEARING STRATA COMMUNICATING WITH A WELL BORE WHICH COMPRISES (1) INJECTING INTO BOTH OF SAID TYPES OF STRATE A HEATED WATER-MISCIBLE OIL-IMMISCIBLE LIQUID UNDER A PRESSURE SUFFICIENT TO FORCE SAID LIQUID INTO THE WATER-BEARING STRATA FOR AN ARBITRARY DISTANCE BACK FROM SAID BORE BUT INSUFFICIENT TO FORCE SAID LIQUID AN EQUAL DISTANCE INTO THE OIL-BEARING STRATA; (2) ALLOWING SAID LIQUID TO REMAIN IN AND TRANSFER HEAT TO SAID STRATA, WHEREBY THERE ARE FORMED HEATED ZONES IMMEDIATELY ADJACENT TO AND EXTENDING ALONG THE LENGTH OF SAID STRATA, THE HEATED ZONES IMMEDIATELY ADJECENT FOR OILTHE WATER-BEARING STRATA EXTENDING FARTHER INTO THE FORMATION THAN THE HEATED ZONES IMMEDIATELY ADJACENT THE OILBEARING STRATA; (3) WITHDRAWING SAID LIQUID FROM SAID STRATA; (4) INJECTING INTI THE SAID STRATA A LIQUID COMPOSITION CAPABLE OF FORMING THEREIN A WATER-INSOLUBLE SOLID
References Cited (Backward Citations)
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US1327268A
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US2366036A
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US2714929A
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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) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |