Patent US3734856A successfully refreshed from Google Patents.
US3734856A
Expired / Lapsed
US
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Use of micellar dispersions as drilling fluids
Assignee: Marathon Oil Co
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Filing: 1971-08-30
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Granted: 1973-05-22
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Expires: 1991-08-30
Abstract
Abstract A WELL DRILLING PROCESS IS IMPROVED BY USING A MICELLAR DISPERSION AS A DRILLING FLUID. THE MICELLAR DISPERSION IS OBTAINED BY MIXING ABOUT 10% TO ABOUT 95% OF A HYDROCARBON WITH ABOUT 5% TO ABOUT 40* OF A PETROLEUM SULFONATE HAVING AN AVERAGE EQUIVALENT WEIGHT WITHIN THE RANGE OF ABOUT 350 TO ABOUT 520 AND THEN ADMIXING WITH SUFFICIENT WATER TO OBTAIN A DESIRED VISCOSITY. IN ADDITION, ELECTROLYTES AND/OR COSURFACTANTS CAN BE INCORPORATED INTO THE MICELLAR DISPERSION TO OBTAIN THE DESIRED VISCOSITY.
Inventors
- 👤 M Son
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:58
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; C09K8/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |