US3009874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well fluid composition and process for using same
Assignee: MAGNET COVE BARINM Corp
•
Filing: 1961-08-07
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Granted: 1961-11-21
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Expires: 1981-08-07
Abstract
No abstract record available.
Inventors
- 👤 Chisholm Walter Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:41
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A FLUID USEFUL IN DRILLING, COMPLETING AND WORKOVER OF WELLS COMPRISING WATER, A CLAYEY MATERIAL, CHROME LIGNOSULFONATE, AN ALKALI METAL HYDROXIDE IN QUANTITY SUFFICIENT TO MAINTAIN THE FLUID IN ALKALINE CONDITION, LIGNITE, AND A CHRONATE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CHROMATES AND DICHROMATES IN QUANTITY EQUIVALENT TO 5 TO 25 POUNDS OF SODIUM DICHROMATE DIHYDRATE PER HUNDRED POUNDS OF LIGNITE, SAID LIGNITE AND CHROMATE MATERIAL TOGETHER BEING PRESENT IN A TOTAL AMOUNT OF FROM 1 TO 15 POUNDS PER BARREL OF SAID FLUID.
Claim 2
Dependent Claim
87 words
A FLUID USEFUL IN DRILLING, COMPLETING AND WORKOVER OF WELLS COMPRISING WATER, A CLAYEY MATERIAL, CHROME LIGNOSULFONATE, AN ALKALI METAL HYDROXIDE IN QUANTITY SUFFICIENT TO MAINTAIN THE FLUID IN ALKALINE CONDITION, LIGNITE, AND A CHRONATE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CHROMATES AND DICHROMATES IN QUANTITY EQUIVALENT TO 5 TO 25 POUNDS OF SODIUM DICHROMATE DIHYDRATE PER HUNDRED POUNDS OF LIGNITE, SAID LIGNITE AND CHROMATE MATERIAL TOGETHER BEING PRESENT IN A TOTAL AMOUNT OF FROM 1 TO 15 POUNDS PER BARREL OF SAID FLUID.
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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) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |