US2764546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-base drilling fluids and methods of drilling with same
Assignee: Phillips Petroleum Co
•
Filing: 1953-09-21
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Granted: 1956-09-25
•
Expires: 1973-09-21
Abstract
No abstract record available.
Inventors
- 👤 Charles J Engle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:46
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
90 words
A PROCESS FOR PREPARING A CIRCULATABLE OIL-BASE DRILLING FLUID WHICH COMPRISES THE STEPS OF MIXING OIL, WEIGHTING MATERIAL, AND AT LEAST 0.1 POUND OF AN OILDISPERSIBLE SOAP OF A POLYVALENT METAL AND A SATURATED ORGANIC CARBOXYLIC ACID HAVING 8 TO 18, INCLUSIVE, CARBON ATOMS PER MOLECULE PER BARREL OF OIL, AND HEATING RESULTING MIXTURE TO A TEMPERATURE IN THE RANGE FROM ABOUT 80* C. TO BELOW THAT TEMPERATURE AT WHICH SAID SOAP DECOMPOSES FOR A PERIOD OF TIME SUFFICIENT TO SUBSTANTIALLY LOWER THE FLUID LOSS CHARACTERISTIC OF THE SAID MIXTURE.
Claim 2
Dependent Claim
90 words
A PROCESS FOR PREPARING A CIRCULATABLE OIL-BASE DRILLING FLUID WHICH COMPRISES THE STEPS OF MIXING OIL, WEIGHTING MATERIAL, AND AT LEAST 0.1 POUND OF AN OILDISPERSIBLE SOAP OF A POLYVALENT METAL AND A SATURATED ORGANIC CARBOXYLIC ACID HAVING 8 TO 18, INCLUSIVE, CARBON ATOMS PER MOLECULE PER BARREL OF OIL, AND HEATING RESULTING MIXTURE TO A TEMPERATURE IN THE RANGE FROM ABOUT 80* C. TO BELOW THAT TEMPERATURE AT WHICH SAID SOAP DECOMPOSES FOR A PERIOD OF TIME SUFFICIENT TO SUBSTANTIALLY LOWER THE FLUID LOSS CHARACTERISTIC OF THE SAID MIXTURE.
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |