US3244230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing of deep permeable earth formations
Assignee: ExxonMobil Oil Corp
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Filing: 1962-09-27
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Granted: 1966-04-05
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Expires: 1982-09-27
Abstract
No abstract record available.
Inventors
- 👤 Lorld G Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:09
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/5045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD FOR TREATING A PERMEABLE SUBTERRANEAN FORMATION HAVING A TEMPERATURE IN EXCESS OF ABOUT 145* F. AND PENETRATED BY A WELL COMPRISING INRODUCING INTO SAID FORMATION AN AQUEOUS SOLUTION OF SODIUM SILICATE AND UREA AND IMMOBILIZING SAID AQUEOUS SOLUTION IN SAID FORMATION FOR A SUFFICIENT PERIOD OF TIME FOR SAID SODIUM SILICATE AND UREA TO REACT TO FORM A HYDROGEL OF SILICA WITHIN SAID FORMATION WHEREBY THE PERMEABILITY OF SAID FORMATION TO THE FLOW OF FLUID IS REDUCED.
Claim 2
Independent Claim
79 words
A METHOD FOR TREATING A PERMEABLE SUBTERRANEAN FORMATION HAVING A TEMPERATURE IN EXCESS OF ABOUT 145* F. AND PENETRATED BY A WELL COMPRISING INRODUCING INTO SAID FORMATION AN AQUEOUS SOLUTION OF SODIUM SILICATE AND UREA AND IMMOBILIZING SAID AQUEOUS SOLUTION IN SAID FORMATION FOR A SUFFICIENT PERIOD OF TIME FOR SAID SODIUM SILICATE AND UREA TO REACT TO FORM A HYDROGEL OF SILICA WITHIN SAID FORMATION WHEREBY THE PERMEABILITY OF SAID FORMATION TO THE FLOW OF FLUID IS REDUCED.
References Cited (Backward Citations)
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Cited
US2761511A
Cited
US2784787A
Cited
US2923356A
Cited
US2968572A
Cited
US3059997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |