US2779415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plugging formations with hot solutions
Assignee: Stanolind Oil and Gas Co
•
Filing: 1953-02-26
•
Granted: 1957-01-29
•
Expires: 1973-02-26
Abstract
No abstract record available.
Inventors
- 👤 George C Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:48
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/516; Y; Y10; Y10S; Y10S507/00; Y10S507/935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
THE METHOD OF SELECTIVELY PLUGGING A NON-OIL-PRODUCING ZONE OF A FORMATION PENETRATED BY AN OIL WELL ABOVE THAT OF SAID FORMATION A SOLUTION OF AN OIL-SOLVENT, WATER-INSOLUBLE PLUGGING AGENT IN AN OIL-SOLUBLE SOLVENT, SAID PLUGGING AGENT BEING A SOLID AT FORMATION TEMPERATURE AND PRESSURE AND BEING NON-REACTIVE WITH SAID FORMATION, SUFFICIENT PLUGGING AGENT BEING IN SAID SOLUTION WHEN INJECTED INTO SAID FORMATION TO FORM A PRECIPITATE WHEN SAID SOLUTION IS COOLED TO FORMATION TEMPERATURE, WHEREBY THE FORMATION IS PARTIALLY PLUGGED, THE AMOUNT OF PLUGGING AGENT IN SAID SOLUTION WHEN INJECTED BEING ONLY SUFFICIENT TO FORM A VOLUME OF PRECIPITATE LESS THAN 35 PERCENT OF THE VOLUME OF THE INJECTED SOLUTION WHEREBY SOME FORMATION PERMEABILITY IS RETAINED SO THAT WHEN THE WELL IS PRODUCED, OIL FLOWING THROUGH ANY OIL-PRODUCING ZONE DISSOLVES THE PRECIPITATED PLUGGING AGENT INJECTED INTO SAID ZONE TO RESTORE THE PERMEABILITY OF SUCH ZONE WHILE SAID NON-OIL-PRODUCING ZONE REMAINS PARTIALLY PLUGGED.
Claim 2
Independent Claim
152 words
THE METHOD OF SELECTIVELY PLUGGING A NON-OIL-PRODUCING ZONE OF A FORMATION PENETRATED BY AN OIL WELL ABOVE THAT OF SAID FORMATION A SOLUTION OF AN OIL-SOLVENT, WATER-INSOLUBLE PLUGGING AGENT IN AN OIL-SOLUBLE SOLVENT, SAID PLUGGING AGENT BEING A SOLID AT FORMATION TEMPERATURE AND PRESSURE AND BEING NON-REACTIVE WITH SAID FORMATION, SUFFICIENT PLUGGING AGENT BEING IN SAID SOLUTION WHEN INJECTED INTO SAID FORMATION TO FORM A PRECIPITATE WHEN SAID SOLUTION IS COOLED TO FORMATION TEMPERATURE, WHEREBY THE FORMATION IS PARTIALLY PLUGGED, THE AMOUNT OF PLUGGING AGENT IN SAID SOLUTION WHEN INJECTED BEING ONLY SUFFICIENT TO FORM A VOLUME OF PRECIPITATE LESS THAN 35 PERCENT OF THE VOLUME OF THE INJECTED SOLUTION WHEREBY SOME FORMATION PERMEABILITY IS RETAINED SO THAT WHEN THE WELL IS PRODUCED, OIL FLOWING THROUGH ANY OIL-PRODUCING ZONE DISSOLVES THE PRECIPITATED PLUGGING AGENT INJECTED INTO SAID ZONE TO RESTORE THE PERMEABILITY OF SUCH ZONE WHILE SAID NON-OIL-PRODUCING ZONE REMAINS PARTIALLY PLUGGED.
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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |