US2696468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conductive oil-base drilling fluids
Assignee: Union Oil Company of California
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Filing: 1952-04-25
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Granted: 1954-12-07
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Expires: 1972-04-25
Abstract
No abstract record available.
Inventors
- 👤 Paul W Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:18
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; Y; Y10; Y10S; Y10S507/00; Y10S507/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE METHOD OF PREPARING AN ELECTRICALLY CONDUCTIVE OIL-BASE DRILLING FLUID WHICH COMPRISES ADDING TO A NORMALLY NON-CONDUCTIVE OIL-BASE DRILLING FLUID BETWEEN ABOUT 5 AND ABOUT 20 PER CENT BY WEIGHT OF A COMPOSITION COMPRISING 100 PARTS BY WEIGHT OF WATER, BETWEEN ABOUT 10 AND ABOUT 40 PARTS BY WEIGHT OF A MIXTURE OF AN ALKALI-METAL HYDROXIDE AND WATER-SOLUBLE SALT OF A STRONG BASE AND A WEAK ACID, AND BETWEEN ABOUT 20 AND ABOUT 80 PARTS BY WEIGHT OF AN EMULSIFYING AGENT SELECTED FROM THE CLASS CONSISTING OF SULFATED OILS, SULFATED ALCOHOLS, ALIPHATIC AND NAPHTHENIC SULFONATES, AROMATIC SULFONATES, AND THE ALKALI-METAL SALTS THEREOF.
Claim 2
Independent Claim
102 words
THE METHOD OF PREPARING AN ELECTRICALLY CONDUCTIVE OIL-BASE DRILLING FLUID WHICH COMPRISES ADDING TO A NORMALLY NON-CONDUCTIVE OIL-BASE DRILLING FLUID BETWEEN ABOUT 5 AND ABOUT 20 PER CENT BY WEIGHT OF A COMPOSITION COMPRISING 100 PARTS BY WEIGHT OF WATER, BETWEEN ABOUT 10 AND ABOUT 40 PARTS BY WEIGHT OF A MIXTURE OF AN ALKALI-METAL HYDROXIDE AND WATER-SOLUBLE SALT OF A STRONG BASE AND A WEAK ACID, AND BETWEEN ABOUT 20 AND ABOUT 80 PARTS BY WEIGHT OF AN EMULSIFYING AGENT SELECTED FROM THE CLASS CONSISTING OF SULFATED OILS, SULFATED ALCOHOLS, ALIPHATIC AND NAPHTHENIC SULFONATES, AROMATIC SULFONATES, AND THE ALKALI-METAL SALTS THEREOF.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |