Patent US4950129A successfully refreshed from Google Patents.
Patent US3048538A successfully refreshed from Google Patents.
US3048538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-based drilling fluid having enhanced lubricating properties
Assignee: Gulf Research and Development Co
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Filing: 1959-05-08
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Granted: 1962-08-07
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Expires: 1979-05-08
Abstract
No abstract record available.
Inventors
- 👤 Rosenberg Milton
- 👤 Schaub Paul William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:01
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A WATER-BASE DRILLING FLUID HAVING EXTREME PRESSURE LUBRICATING PROPERTIES CONSISTING ESSENTIALLY OF WATER AND AN EXTREME PRESSURE LUBRICANT ADDITIVE SELECTED FROM THE GROUP CONSISTING OF FATTY ACIDS HAVING AT LEAST 8 CARBON ATOMS PER MOLECULE, SULFURIZED FATTY ACIDS HAVING AT LEAST 8 CARBON ATOMS PER MOLECULE, ALKALI METAL SOAPS OF FATTY ACIDS AND ALKALI METAL SOAPS OF SULFURIZED FATTY ACIDS, AVAILABLE CALCIUM IONS IN A CONCENTRATION ABOVE ABOUT 150 PARTS PER MILLION HIGH ENOUGH TO FORM INSOLUBLE CURDS OF CALCIUM SOAP, AND A NON-IONIC SURFACE ACTIVE AGENT SELECTED FROM THE GROUP CONSISTING OF POLYOXYETHLENE DERIVATIVES OF ALKYL PHENOLS, POLOXYETHYLENE DERIVATIVES OF ALKYL GLYCOLS, AND POLYOXYETHYLENE DERIVATIVES OF ANHYDROALKITOL ESTERS IN A CONCENTRATION ADEQUATE TO DISPERSE THE CALCIUM SOAP IN THE DRILLING FLUID.
Claim 2
Dependent Claim
122 words
A WATER-BASE DRILLING FLUID HAVING EXTREME PRESSURE LUBRICATING PROPERTIES CONSISTING ESSENTIALLY OF WATER AND AN EXTREME PRESSURE LUBRICANT ADDITIVE SELECTED FROM THE GROUP CONSISTING OF FATTY ACIDS HAVING AT LEAST 8 CARBON ATOMS PER MOLECULE, SULFURIZED FATTY ACIDS HAVING AT LEAST 8 CARBON ATOMS PER MOLECULE, ALKALI METAL SOAPS OF FATTY ACIDS AND ALKALI METAL SOAPS OF SULFURIZED FATTY ACIDS, AVAILABLE CALCIUM IONS IN A CONCENTRATION ABOVE ABOUT 150 PARTS PER MILLION HIGH ENOUGH TO FORM INSOLUBLE CURDS OF CALCIUM SOAP, AND A NON-IONIC SURFACE ACTIVE AGENT SELECTED FROM THE GROUP CONSISTING OF POLYOXYETHLENE DERIVATIVES OF ALKYL PHENOLS, POLOXYETHYLENE DERIVATIVES OF ALKYL GLYCOLS, AND POLYOXYETHYLENE DERIVATIVES OF ANHYDROALKITOL ESTERS IN A CONCENTRATION ADEQUATE TO DISPERSE THE CALCIUM SOAP IN THE DRILLING FLUID.
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) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |