US2554214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluids and methods of use
Assignee: Phillips Petroleum Co
•
Filing: 1947-08-18
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Granted: 1951-05-22
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Expires: 1967-08-18
Abstract
No abstract record available.
Inventors
- 👤 Scarth Virgil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:57
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
108 words
A WATER BASE WELL DRILLING MUD COMPRISING IN COMBINATION SUFFICIENT WATER TO MAINTAIN THE MUD AS A FLUID, SUFFICIENT ALKALI TO MAINTAIN A PH OF 7.9 OR GREATER, SUFFICIENT CLAYEY MATERIAL TO FORM A FILTER CAKE ON THE WALL OF THE WELL, AND A SALT OF CARBOXYMETHYLCELLULOSE AND A METAL SELECTED FROM THE GROUP COMPOSED OF THE METALS OF THE GROUPS IB, IIB, IV, V, VII AND VIII OF THE PERIODIC SERIES OF ELEMENTS 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
108 words
A WATER BASE WELL DRILLING MUD COMPRISING IN COMBINATION SUFFICIENT WATER TO MAINTAIN THE MUD AS A FLUID, SUFFICIENT ALKALI TO MAINTAIN A PH OF 7.9 OR GREATER, SUFFICIENT CLAYEY MATERIAL TO FORM A FILTER CAKE ON THE WALL OF THE WELL, AND A SALT OF CARBOXYMETHYLCELLULOSE AND A METAL SELECTED FROM THE GROUP COMPOSED OF THE METALS OF THE GROUPS IB, IIB, IV, V, VII AND VIII OF THE PERIODIC SERIES OF ELEMENTS 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)
US2129913A
Cited
US2425768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |