US2842206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water shut-off method
Assignee: Pan American Petroleum Corp
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Filing: 1956-12-28
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Granted: 1958-07-08
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Expires: 1976-12-28
Abstract
No abstract record available.
Inventors
- 👤 William G Bearden
- 👤 George C Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:32
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/514; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A METHOD FOR PLUGGING A WATER-BEARING FORMATION PENETRATED BY A WELL COMPRISING INJECTING INTO SAID WELL AND THEN INTO SAID FORMATION A TREATING SOLUTION CONTAIN ING FROM ABOUT 40 TO ABOUT 60 PERCENT BY WEIGHT OF A PLUGGING AGENT SELECTED FROM THE GROUP CONSISTING OF ROSIN AND ROSIN POLYMERS IN AN OIL-SOLUBLE SOLVENT FOR SAID PLUGGING AGENT, SAID SOLVENT BEING MISCIBLE IN ALL PROPORTIONS WITH WATER, DISPLACING SAID TREATING SOLUTION INTO SAID FORMATION WITH A SEPARATE VOLUME OF WATER EQUAL TO AT LEAST ABOUT 1/10 THE VOLUME OF TREATING SOLUTION, AND DISPLACING SAID VOLUME OF WATER INTO SAID FORMATION WITH AT LEAST ONE ADDITIONAL BATCH OF TREATING SOLUTION FOLLOWED BY WATER WHEREBY MORE UNIFORM PENETRATION OF TREATING SOLUTIONS INTO ZONES OF DIFFERING PERMEABILITIES IS OBTAINED.
Claim 2
Independent Claim
125 words
A METHOD FOR PLUGGING A WATER-BEARING FORMATION PENETRATED BY A WELL COMPRISING INJECTING INTO SAID WELL AND THEN INTO SAID FORMATION A TREATING SOLUTION CONTAIN ING FROM ABOUT 40 TO ABOUT 60 PERCENT BY WEIGHT OF A PLUGGING AGENT SELECTED FROM THE GROUP CONSISTING OF ROSIN AND ROSIN POLYMERS IN AN OIL-SOLUBLE SOLVENT FOR SAID PLUGGING AGENT, SAID SOLVENT BEING MISCIBLE IN ALL PROPORTIONS WITH WATER, DISPLACING SAID TREATING SOLUTION INTO SAID FORMATION WITH A SEPARATE VOLUME OF WATER EQUAL TO AT LEAST ABOUT 1/10 THE VOLUME OF TREATING SOLUTION, AND DISPLACING SAID VOLUME OF WATER INTO SAID FORMATION WITH AT LEAST ONE ADDITIONAL BATCH OF TREATING SOLUTION FOLLOWED BY WATER WHEREBY MORE UNIFORM PENETRATION OF TREATING SOLUTIONS INTO ZONES OF DIFFERING PERMEABILITIES IS OBTAINED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |