Patent US3025911A successfully refreshed from Google Patents.
US3025911A
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Treatment of oil bearing formations
Assignee: Phillips Petroleum Co
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Filing: 1958-01-27
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Granted: 1962-03-20
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Expires: 1978-01-27
Abstract
No abstract record available.
Inventors
- 👤 William E Bergman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:01
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/607; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A METHOD FOR IMPROVING THE PERMEABILITY OF A CLAY-CONTAINING SUBTERRANEAN FORMATION, WHICH HAS BEEN CONTACTED WITH WATER IN A WATER FLOODING OPERATION AND WHEREIN THE PERMEABILITY OF SAID CLAY-CONTAINING FORMATION FOR WATER AND OIL DECREASES DUE TO SWELLING OF THE CLAY THEREIN BY SAID WATER, THE IMPROVEMENT COMPRISING INJECTING AN AQUEOUS SOLUTION OF A WATER SOLUBLE FLUROIDE SELECTED FROM THE GROUP OF FLUORIDES CONSISTING OF LITHIUM FLUORIDE, SODIUM FLUORIDE, POTASSIUM FLUORIDE, CESIUM FLUORRIDE, RUBIDIUM FLUORIDE, AMMONIUM FLUORIDE, AND A REAC-
Claim 2
Dependent Claim
81 words
IN A METHOD FOR IMPROVING THE PERMEABILITY OF A CLAY-CONTAINING SUBTERRANEAN FORMATION, WHICH HAS BEEN CONTACTED WITH WATER IN A WATER FLOODING OPERATION AND WHEREIN THE PERMEABILITY OF SAID CLAY-CONTAINING FORMATION FOR WATER AND OIL DECREASES DUE TO SWELLING OF THE CLAY THEREIN BY SAID WATER, THE IMPROVEMENT COMPRISING INJECTING AN AQUEOUS SOLUTION OF A WATER SOLUBLE FLUROIDE SELECTED FROM THE GROUP OF FLUORIDES CONSISTING OF LITHIUM FLUORIDE, SODIUM FLUORIDE, POTASSIUM FLUORIDE, CESIUM FLUORRIDE, RUBIDIUM FLUORIDE, AMMONIUM FLUORIDE, AND A REAC-
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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) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |