US3236306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of clay-containing formations
Assignee: ExxonMobil Upstream Research Co
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Filing: 1963-11-07
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Granted: 1966-02-22
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Expires: 1983-11-07
Abstract
No abstract record available.
Inventors
- 👤 Donald K Atwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:56
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/607
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD FOR TREATING A SUBSURFACE CLAY-CONTAINING FORMATION WHICH HAS BEEN DAMAGED BY CONTACT WITH FRESH WATER SUCH THAT THE PERMEABILITY OF SAID FORMATION HAS BEEN LOWERED WHICH COMPRISES TREATING SAID DAMAGED FORMATION WITH AN ALIPHATIC ALCOHOL IN WHICH WATER IS SOLUBLE IN AN AMOUNT FROM ABOUT 2% TO ABOUT 12% BY WEIGHT AND WHICH HAS AN INTERFACIAL TENSION WITH WATER IN DYNES PER CM. AT LEAST ABOUT 4.0 AND A PARTITION COEFFICIENT AT LEAST ABOUT 3 WHEREBY THE ORIGINAL PERMEABILITY OF SAID FORMATION IS SUBSTANTIALLY RESTORED.
Claim 2
Independent Claim
87 words
A METHOD FOR TREATING A SUBSURFACE CLAY-CONTAINING FORMATION WHICH HAS BEEN DAMAGED BY CONTACT WITH FRESH WATER SUCH THAT THE PERMEABILITY OF SAID FORMATION HAS BEEN LOWERED WHICH COMPRISES TREATING SAID DAMAGED FORMATION WITH AN ALIPHATIC ALCOHOL IN WHICH WATER IS SOLUBLE IN AN AMOUNT FROM ABOUT 2% TO ABOUT 12% BY WEIGHT AND WHICH HAS AN INTERFACIAL TENSION WITH WATER IN DYNES PER CM. AT LEAST ABOUT 4.0 AND A PARTITION COEFFICIENT AT LEAST ABOUT 3 WHEREBY THE ORIGINAL PERMEABILITY OF SAID FORMATION IS SUBSTANTIALLY RESTORED.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |