Patent US3086937A successfully refreshed from Google Patents.
US3086937A
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Drilling mud
Assignee: Union Oil Company of California
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Filing: 1961-01-13
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Granted: 1963-04-23
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Expires: 1981-01-13
Abstract
No abstract record available.
Inventors
- 👤 Paul W Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:24
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; C09K8/26; C09K8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A DRILLING FLUID SELECTED FROM THE CLASS CONSISTING OF 2WATER BASE AND OIL-IN-WATER EMULSION BASE DRILLING FLUIDS, SAID DRILLING FLUID COMPRISING AN AQUEOUS SUSPENSION OF A CLAY AND BETWEEN ABOUT 2 AND ABOUT 10 POUNDS OF A CLAY HYDRATION INHIBITOR PER BARREL OF FLUID, SAID INHIBITOR COMPRISING A HYDROXYALKYLATED ALKYLENE DIAMINE HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
56 words
A DRILLING FLUID SELECTED FROM THE CLASS CONSISTING OF 2WATER BASE AND OIL-IN-WATER EMULSION BASE DRILLING FLUIDS, SAID DRILLING FLUID COMPRISING AN AQUEOUS SUSPENSION OF A CLAY AND BETWEEN ABOUT 2 AND ABOUT 10 POUNDS OF A CLAY HYDRATION INHIBITOR PER BARREL OF FLUID, SAID INHIBITOR COMPRISING A HYDROXYALKYLATED ALKYLENE DIAMINE HAVING THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
CA576739A
Cited
US2697118A
Cited
US2884459A
Cited
US2873251A
Cited
US2994660A
Cited
US2935473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |