Patent US2523977A successfully refreshed from Google Patents.
US2523977A
Expired / Lapsed
US
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Drilling fluids
Assignee: Phillips Petroleum Co
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Filing: 1945-11-05
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Granted: 1950-09-26
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Expires: 1965-11-05
Abstract
No abstract record available.
Inventors
- 👤 Cary R Wagner
- 👤 William N Axe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:59
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A WATER BASE WELL DRILLING MUD COMPRISING IN COMBINATION SUFFICIENT WATER TO MAINTAIN THE MUD AS A FLUID, SUFFICIENT CLAYEY MATERIAL TO FORM A FILTER CAKE ON THE WALL OF THE WELL, AND A WATER SOLUBLE CELLULOSE XANTHATE SUBSTANTIALLY STABILIZED AGAINST COAGULATION DUE TO USUAL NATURAL WELL CONDITIONS BY THE INCORPORATION OF AN EFFECTIVE AMOUNT OF A CELLULOSE XANTHATE-RIPENING INHIBITOR, SAID CELLULOSE XANTHATE AND RIPENING INHIBITOR''S BEING INCORPORATED IN AN AMOUNT SUFFICIENT TO REDUCE THE WATER LOSS DUE TO FILTRATION THROUGH SAID FILTER CAKE WITHOUT INCREASING THE VISCOSITY OF SAID WELL DRILLING MUD TO SUCH AN EXTENT THAT IT CANNOT BE CIRCULATED.
Claim 2
Dependent Claim
102 words
A WATER BASE WELL DRILLING MUD COMPRISING IN COMBINATION SUFFICIENT WATER TO MAINTAIN THE MUD AS A FLUID, SUFFICIENT CLAYEY MATERIAL TO FORM A FILTER CAKE ON THE WALL OF THE WELL, AND A WATER SOLUBLE CELLULOSE XANTHATE SUBSTANTIALLY STABILIZED AGAINST COAGULATION DUE TO USUAL NATURAL WELL CONDITIONS BY THE INCORPORATION OF AN EFFECTIVE AMOUNT OF A CELLULOSE XANTHATE-RIPENING INHIBITOR, SAID CELLULOSE XANTHATE AND RIPENING INHIBITOR''S BEING INCORPORATED IN AN AMOUNT SUFFICIENT TO REDUCE THE WATER LOSS DUE TO FILTRATION THROUGH SAID FILTER CAKE WITHOUT INCREASING THE VISCOSITY OF SAID WELL DRILLING MUD TO SUCH AN EXTENT THAT IT CANNOT BE CIRCULATED.
References Cited (Backward Citations)
US1674401A
Cited
US2129913A
Cited
US2336171A
Cited
US2364434A
Cited
US2337296A
Cited
US2425768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |