US2631128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluids and methods of using the same
Assignee: Phillips Petroleum Co
•
Filing: 1950-04-24
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Granted: 1953-03-10
•
Expires: 1970-04-24
Abstract
No abstract record available.
Inventors
- 👤 Rufus V Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:21
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
73 words
A WATER BASE 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 ALKALI METAL POLYVINYL SULFATE IN AN AMOUNT SUFFICIENT TO REDUCE THE WATER LOSS DUE TO FILTRATION THROUGH SAID FILTER CAKE WITHOUT INCREASING THE VISCOSITY OF SAID WELL DRILLING FLUID TO SUCH AN EXTEND THAT IT CANNOT BE CIRCULATED.
Claim 2
Dependent Claim
73 words
A WATER BASE 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 ALKALI METAL POLYVINYL SULFATE IN AN AMOUNT SUFFICIENT TO REDUCE THE WATER LOSS DUE TO FILTRATION THROUGH SAID FILTER CAKE WITHOUT INCREASING THE VISCOSITY OF SAID WELL DRILLING FLUID TO SUCH AN EXTEND THAT IT CANNOT BE CIRCULATED.
References Cited (Backward Citations)
US443069A
Cited
US2145345A
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US2364434A
Cited
US2395347A
Cited
US2425768A
Cited
US2489521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |