US2636857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling the viscosity of drilling muds
Assignee: Phillips Petroleum Co
•
Filing: 1948-11-22
•
Granted: 1953-04-28
•
Expires: 1968-11-22
Abstract
No abstract record available.
Inventors
- 👤 William E Bergman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:55
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A METHOD FOR REDUCING THE VISCOSITY OF A WATER BASE DRILLING MUD HAVING A PH ABOVE 7 WHICH COMPRISES CONCOMITANTLY ADMIXING WITH SAID MUD SODIUM META-ALUMINATE IN AN AMOUNT WITHIN THE RANGE OF 0.01 TO 4 POUNDS PER BARREL OF SAID MUD AND QUEBRACHO IN AN AMOUNT SUFFICIENT TO REDUCE THE VISCOSITY THEREOF.
Claim 2
Independent Claim
53 words
A METHOD FOR REDUCING THE VISCOSITY OF A WATER BASE DRILLING MUD HAVING A PH ABOVE 7 WHICH COMPRISES CONCOMITANTLY ADMIXING WITH SAID MUD SODIUM META-ALUMINATE IN AN AMOUNT WITHIN THE RANGE OF 0.01 TO 4 POUNDS PER BARREL OF SAID MUD AND QUEBRACHO IN AN AMOUNT SUFFICIENT TO REDUCE THE VISCOSITY THEREOF.
References Cited (Backward Citations)
US1999766A
Cited
US2211688A
Cited
US2336595A
Cited
US2414647A
Cited
US2450936A
Cited
US2474329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |