Patent US2672935A successfully refreshed from Google Patents.
US2672935A
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Method of treating wells
Assignee: Dow Chemical Co
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Filing: 1952-07-02
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Granted: 1954-03-23
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Expires: 1972-07-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank H Braunlich
- 👤 Paul H Cardwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:04
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/845; Y; Y10; Y10S; Y10S507/00; Y10S507/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
THE METHOD OF TREATING AN EARTH FORMATION PENETRATED BY THE BORE OF A WALL WHICH COMPRISES INTRODUCING INTO THE WELL AND AQUEOUS THIXOTROPIC COMPOSITION COMPRISING MAGNESIUM FLUORIDE FORMED BY REACTING TOGETHER AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE MAGNESIUM SALT AND AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE FLUORIDE IN THE PRESENCE OF A STRONG MINERAL ACID THE NUMBER OF EQUIVALENT WEIGHTS OF THE FLUORIDE SALT BEING FROM 95 TO 105 PER CENT OF THE NUMBER OF EQUIVALENT WEIGHTS OF THE MAGNESIUM SALT AND THE NUMBER OF EQUIVALENT WEIGHTS OF ACID BEING FROM 45 TO 350 PER CENT THE NUMBER OF EQUIVALENT WEIGHT OF THE MAGNESIUM SALT, THE NUMBER OF MOLES OF WATER IN THE MAGNESIUM SALT SOLUTION PLUS THE NUMBER OF MOLES OF WATER IN THE FLUORIDE SALT SOLUTION BEING BETWEEN ABOUT 12 AND 121 TIMES THE NUMBER OF EQUIVALENT WEIGHTS OF THE MAGNESIUM SALT.
Claim 2
Independent Claim
144 words
THE METHOD OF TREATING AN EARTH FORMATION PENETRATED BY THE BORE OF A WALL WHICH COMPRISES INTRODUCING INTO THE WELL AND AQUEOUS THIXOTROPIC COMPOSITION COMPRISING MAGNESIUM FLUORIDE FORMED BY REACTING TOGETHER AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE MAGNESIUM SALT AND AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE FLUORIDE IN THE PRESENCE OF A STRONG MINERAL ACID THE NUMBER OF EQUIVALENT WEIGHTS OF THE FLUORIDE SALT BEING FROM 95 TO 105 PER CENT OF THE NUMBER OF EQUIVALENT WEIGHTS OF THE MAGNESIUM SALT AND THE NUMBER OF EQUIVALENT WEIGHTS OF ACID BEING FROM 45 TO 350 PER CENT THE NUMBER OF EQUIVALENT WEIGHT OF THE MAGNESIUM SALT, THE NUMBER OF MOLES OF WATER IN THE MAGNESIUM SALT SOLUTION PLUS THE NUMBER OF MOLES OF WATER IN THE FLUORIDE SALT SOLUTION BEING BETWEEN ABOUT 12 AND 121 TIMES THE NUMBER OF EQUIVALENT WEIGHTS OF THE MAGNESIUM SALT.
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) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |