US3085977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid loss retarder for clear water drilling fluids
Assignee: Pan American Petroleum Corp
•
Filing: 1959-10-21
•
Granted: 1963-04-16
•
Expires: 1979-10-21
Abstract
No abstract record available.
Inventors
- 👤 Park Arthur
- 👤 James W Spurlock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:36
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; C09K8/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A CLEAR WATER DRILLING FLUID STABLE TO IONS OF THE ALKALINE EARTH METALS, SODIUM AND IRON, AND IN WHICH THE OTHER ESSENTIAL AND ACTIVE INGREDIENTS, IN ADDITION TO WATER, CONSIST ESSENTIALLY OF FROM ABOUT 1 TO ABOUT 15 POUNDS PER BARREL OF AN AQUEOUS RESIN EMULSION AS A LOST CIRCULATION RETARDER STABILIZED WITH FROM ABOUT 5 TO ABOUT 40 PERCENT BY WEIGHT OF A SURFACE-ACTIVE AGENT, BASED UPON THE WEIGHT OF SAID EMULSION, SAID AGENT BEING SELECTED FROM THE GROUP CONSISTING OF NONIONIC AND CATIONIC SURFACE-ACTIVE AGENTS OTHER THAN THOSE THAT ARE PRIMARILY FOAMERS.
Claim 2
Dependent Claim
94 words
A CLEAR WATER DRILLING FLUID STABLE TO IONS OF THE ALKALINE EARTH METALS, SODIUM AND IRON, AND IN WHICH THE OTHER ESSENTIAL AND ACTIVE INGREDIENTS, IN ADDITION TO WATER, CONSIST ESSENTIALLY OF FROM ABOUT 1 TO ABOUT 15 POUNDS PER BARREL OF AN AQUEOUS RESIN EMULSION AS A LOST CIRCULATION RETARDER STABILIZED WITH FROM ABOUT 5 TO ABOUT 40 PERCENT BY WEIGHT OF A SURFACE-ACTIVE AGENT, BASED UPON THE WEIGHT OF SAID EMULSION, SAID AGENT BEING SELECTED FROM THE GROUP CONSISTING OF NONIONIC AND CATIONIC SURFACE-ACTIVE AGENTS OTHER THAN THOSE THAT ARE PRIMARILY FOAMERS.
References Cited (Backward Citations)
US1597872A
Cited
US2473929A
Cited
US2718497A
Cited
US2751368A
Cited
US2805990A
Cited
US2775557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |