Patent US2606151A successfully refreshed from Google Patents.
US2606151A
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Method of making drilling fluids
Assignee: Union Oil Company of California
•
Filing: 1949-05-07
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Granted: 1952-08-05
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Expires: 1969-05-07
Abstract
No abstract record available.
Inventors
- 👤 Paul W Fischer
- 👤 Raymond A Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:49
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
67 words
IN A METHOD OF PREPARING A DRILLING FLUID WHICH COMPRISES AN AQUEOUS DISPERSION OF A HYDRATABLE CLAY, A WATER-SOLUBLE POLYVALENT METAL SALT, AND A WATER-SOLUBLE CELLULOSE ETHER WHICH DOES NOT FORM INSOLUBLE METAL SALTS WITH POLYVALENT METAL IONS, THE STEPS WHICH CONSISTS IN SECURING SUBSTANTIALLY COMPLETE HYDRATION OF THE CLAY IN THE AQUEOUS PHASE PRIOR TO THE ADDITION OF THE POLYVALENT METAL SALT AND THE CELLULOSE ETHER.
Claim 2
Dependent Claim
67 words
IN A METHOD OF PREPARING A DRILLING FLUID WHICH COMPRISES AN AQUEOUS DISPERSION OF A HYDRATABLE CLAY, A WATER-SOLUBLE POLYVALENT METAL SALT, AND A WATER-SOLUBLE CELLULOSE ETHER WHICH DOES NOT FORM INSOLUBLE METAL SALTS WITH POLYVALENT METAL IONS, THE STEPS WHICH CONSISTS IN SECURING SUBSTANTIALLY COMPLETE HYDRATION OF THE CLAY IN THE AQUEOUS PHASE PRIOR TO THE ADDITION OF THE POLYVALENT METAL SALT AND THE CELLULOSE ETHER.
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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) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |