US3215628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluid
Assignee: Phillips Petroleum Co
•
Filing: 1962-08-27
•
Granted: 1965-11-02
•
Expires: 1982-08-27
Abstract
No abstract record available.
Inventors
- 👤 Dixon W Peacock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:33
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035; Y; Y10; Y10S; Y10S507/00; Y10S507/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A PROCESS OF DRILLING A WELL WITH WELL DRILLING TOOLS, THE STEP OF CIRCULATING IN SAID WELL A DRILLING LIQUID MEDIUM SELECTED FROM THE GROUP CONSISTING OF OIL, WATER, AND OIL AND WATER EMULSIONS CONTAINING, IN AN AMOUNT SUFFICIENT TO REDUCE THE FILTRATION RATE OF SAID DRILLING LIQUID MEDIUM, A SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL SALTS, ALKALINE EARTH METAL SALTS, AND AMMONIUM SALTS OF A SULFONATED BLEND OF ABOUT 25 TO 75 WEIGHT PERCENT ASPHALT AND ABOUT 75 TO 25 WEIGHT PERCENT OF THE EXTRACT OIL FROM THE SOLVENT EXTRACTION OF A DEASPHALTED, DEWAXED OIL REMAINING AFTER REMOVAL OF SAE-50 AND LIGHTER LUBESTOCK IN THE PROPANE FRACTIONATION OF A MID-CONTINENT LUBE OIL STOCK.
Claim 2
Dependent Claim
118 words
IN A PROCESS OF DRILLING A WELL WITH WELL DRILLING TOOLS, THE STEP OF CIRCULATING IN SAID WELL A DRILLING LIQUID MEDIUM SELECTED FROM THE GROUP CONSISTING OF OIL, WATER, AND OIL AND WATER EMULSIONS CONTAINING, IN AN AMOUNT SUFFICIENT TO REDUCE THE FILTRATION RATE OF SAID DRILLING LIQUID MEDIUM, A SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL SALTS, ALKALINE EARTH METAL SALTS, AND AMMONIUM SALTS OF A SULFONATED BLEND OF ABOUT 25 TO 75 WEIGHT PERCENT ASPHALT AND ABOUT 75 TO 25 WEIGHT PERCENT OF THE EXTRACT OIL FROM THE SOLVENT EXTRACTION OF A DEASPHALTED, DEWAXED OIL REMAINING AFTER REMOVAL OF SAE-50 AND LIGHTER LUBESTOCK IN THE PROPANE FRACTIONATION OF A MID-CONTINENT LUBE OIL STOCK.
References Cited (Backward Citations)
US2331049A
Cited
US2568992A
Cited
US2848415A
Cited
US2953525A
Cited
US2884445A
Cited
US3028333A
Cited
US3099624A
Cited
US3105047A
Cited
US3105046A
Cited
US3135693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |