Patent US2270897A successfully refreshed from Google Patents.
US2772073A
Expired / Lapsed
US
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Homogenizing of drill muds
Assignee: Standard Oil Co
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Filing: 1952-03-22
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Granted: 1956-11-27
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Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
- 👤 Everett A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:08
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD OF PREPARING AN EMULSION-TYPE DRILLING FLUID WHICH COMPRISES COMMINGLING 60 PARTS BY VOLUME OF WATER SATURATED WITH SODIUM CHLORIDE, 40 PARTS BY VOLUME OF FUEL OIL AND 8 POUNDS OF COMMERCIAL LECITHIN PER BARREL OF TOTAL LIQUID, IMPARTING PLASTERING PROPERTIES TO THE RESULTING FLUID MIXTURE BY ADDING 20 POUNDS OF GROUND LIMESTONE PER BARREL OF SAID FLUID, AND SUBJECTING THE ADMIXTURE OF LIQUIDS AND GROUND LIMESTONE TO HOMOGENIZING CONDITIONS WHEREBY A DRILLING FLUID HAVING A ZERO LIQUID LOSS IN ONE HOUR IS PREPARED.
Claim 2
Independent Claim
85 words
THE METHOD OF PREPARING AN EMULSION-TYPE DRILLING FLUID WHICH COMPRISES COMMINGLING 60 PARTS BY VOLUME OF WATER SATURATED WITH SODIUM CHLORIDE, 40 PARTS BY VOLUME OF FUEL OIL AND 8 POUNDS OF COMMERCIAL LECITHIN PER BARREL OF TOTAL LIQUID, IMPARTING PLASTERING PROPERTIES TO THE RESULTING FLUID MIXTURE BY ADDING 20 POUNDS OF GROUND LIMESTONE PER BARREL OF SAID FLUID, AND SUBJECTING THE ADMIXTURE OF LIQUIDS AND GROUND LIMESTONE TO HOMOGENIZING CONDITIONS WHEREBY A DRILLING FLUID HAVING A ZERO LIQUID LOSS IN ONE HOUR IS PREPARED.
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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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |