US3614985A
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Plugging a subterranean formation by homogeneous solution precipitation
Assignee: Shell USA Inc
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Filing: 1970-03-30
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Granted: 1971-10-26
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Expires: 1990-03-30
Abstract
Abstract A PROCESS FOR PLUGGING AN EARTH FORMATION BY INJECTING FLUID THAT FORMS A PLUGGING MATERIAL WITHIN THE FORMATION IS IMPROVED BY INJECTING AN AQUEOUS SOLUTION CONTAINING BOTH A DISSOLVED SALT OF A METAL THAT PRECIPITATES AS A GELATINOUS, HYDROUS OR HYDRATED METAL OXIDE OR HYROXIDE AT A PH HIGHER THAN THAT OF THE SOLUTION AND A DISSOLVED MATERIAL THAT REACTS WITHIN THE SOLUTION AND RAISES THE PH OF THE SOLUTION.
Inventors
- 👤 Edwin A Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:16
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/5045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |