US3065170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluids for use in wells
Assignee: Jersey Production Research Co
•
Filing: 1959-07-02
•
Granted: 1962-11-20
•
Expires: 1979-07-02
Abstract
No abstract record available.
Inventors
- 👤 George K Dumbauld
- 👤 Patrick H Monaghan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:22
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/206; Y; Y10; Y10S; Y10S507/00; Y10S507/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A COMPOSITION SUITABLE FOR USE IN WELLS WHICH CONSISTS OF A SUSPENSION OF CLAY, AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE SALT OF AN ALKALINE EARTH METAL IN A SUFFICIENT AMOUNT TO PROVIDE IN SAID COMPOSITION AN AMOUNT OF ALKALINE EARTH METAL ION OF AT LEAST 1800 P.P.M. AND SUFFICIENT AMOUNTS OF FERROCHROME-LIGNOSULFONATE AND DEXTRAN TO PROVIDE SAID COMPOSITION WITH AN APU FILTRATION RATE LESS THAN ABOUT 20ML., SAID COMPOSITION HAVING PH IN THE RANGE FROM ABOUT 7.5 TO ABOUT 10.0 AND A DENSITY FROM ABOUT 8 TO ABOUT 18 POUNDS PER GALLON, SAID COMPOSITION BEING FORMED BY ADDING SAID FERROCHROMELIGNOSULFONATE AND SAID DEXTRAN TO SAID SUSPENSION PRIOR TO ADDITION OF SAID WATER SOLUBLE SALT.
Claim 2
Dependent Claim
114 words
A COMPOSITION SUITABLE FOR USE IN WELLS WHICH CONSISTS OF A SUSPENSION OF CLAY, AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE SALT OF AN ALKALINE EARTH METAL IN A SUFFICIENT AMOUNT TO PROVIDE IN SAID COMPOSITION AN AMOUNT OF ALKALINE EARTH METAL ION OF AT LEAST 1800 P.P.M. AND SUFFICIENT AMOUNTS OF FERROCHROME-LIGNOSULFONATE AND DEXTRAN TO PROVIDE SAID COMPOSITION WITH AN APU FILTRATION RATE LESS THAN ABOUT 20ML., SAID COMPOSITION HAVING PH IN THE RANGE FROM ABOUT 7.5 TO ABOUT 10.0 AND A DENSITY FROM ABOUT 8 TO ABOUT 18 POUNDS PER GALLON, SAID COMPOSITION BEING FORMED BY ADDING SAID FERROCHROMELIGNOSULFONATE AND SAID DEXTRAN TO SAID SUSPENSION PRIOR TO ADDITION OF SAID WATER SOLUBLE SALT.
References Cited (Backward Citations)
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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) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |