Patent US3122203A successfully refreshed from Google Patents.
US3122203A
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Well washing process and composition
Assignee: Dow Chemical Co
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Filing: 1959-07-23
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Granted: 1964-02-25
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Expires: 1979-07-23
Abstract
No abstract record available.
Inventors
- 👤 Robert R Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:48
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/52; C09K8/528; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A WELL WASHING PROCESS, THE STEPS COMPRISING: INTRODUCING INTO THE WELL A MIXTURE OF ARCYLAMIDE POLYMER HYDROLYTE AND A CIRCULATING MEDIUM AND REMOVING SAID MIXTURE FROM SAID WELL THROUGH THE WELL BORE, SAID POLYMER HYDROLYTE BEING OF HIGH MOLECULAR WEIGHT, CHARACTERIZED BY A VISCOSITY OF AT LEAST 4 CENTIPOISES FOR AN AQUEOUS 0.5 PERCENT BY WEIGHT SOLUTION THEREOF IN DISTILLED WATER ADJUSTED TO A PH OF 3.5 AND A TEMPERATURE OF 21.5*C. AND HAVING FROM ABOUT 0.8 PERCENT TO ABOUT 10 PERCENT OF THE AMIDE GROUPS OF THE POLYMER REPLACED BY CARBOXYL GROUPS.
Claim 2
Dependent Claim
93 words
A WELL WASHING PROCESS, THE STEPS COMPRISING: INTRODUCING INTO THE WELL A MIXTURE OF ARCYLAMIDE POLYMER HYDROLYTE AND A CIRCULATING MEDIUM AND REMOVING SAID MIXTURE FROM SAID WELL THROUGH THE WELL BORE, SAID POLYMER HYDROLYTE BEING OF HIGH MOLECULAR WEIGHT, CHARACTERIZED BY A VISCOSITY OF AT LEAST 4 CENTIPOISES FOR AN AQUEOUS 0.5 PERCENT BY WEIGHT SOLUTION THEREOF IN DISTILLED WATER ADJUSTED TO A PH OF 3.5 AND A TEMPERATURE OF 21.5*C. AND HAVING FROM ABOUT 0.8 PERCENT TO ABOUT 10 PERCENT OF THE AMIDE GROUPS OF THE POLYMER REPLACED BY CARBOXYL GROUPS.
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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) | 1967-02-24 | 1967-08-26 | 1968-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-24 | 1971-08-26 | 1972-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-24 | 1975-08-26 | 1976-02-25 | $7700.00 | Window Closed / Lapsed |