US2670329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling muds and methods of using same
Assignee: Phillips Petroleum Co
•
Filing: 1950-08-03
•
Granted: 1954-02-23
•
Expires: 1970-08-03
Abstract
No abstract record available.
Inventors
- 👤 Rufus V Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:25
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/206
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A WATER BASE DRILLING MUD COMPOSITION COMPRISING IN COMBINATION, SUFFICIENT WATER TO MAINTAIN THE MUD AS A FLUID, SUFFICIENT CLAYED MATERIAL TO FORM A FILTER CAKE ON THE WALL OF THE WELL AND A WATER-SOLUBLE SUBSTITUTED CHITIN SELECTED FROM THE GROUP CONSISTING OF THE WATER-SOLUBLE SALTS OF CHITIN SULFATE, CARBOXYMETHYLCHITIN AND CARBOXYETHLCHITIN IN AN AMOUNT SUFFICIENT TO REDUCE THE WATER LOSS DUE TO FILTRATION THROUGH SAID FILTER CAKE WITHOUT INCREASING THE VICOSITY OF SAID DRILLING FLUID TO SUCH AN EXTENT THAT IT CANNOT BE CIRCULATED.
Claim 2
Dependent Claim
85 words
A WATER BASE DRILLING MUD COMPOSITION COMPRISING IN COMBINATION, SUFFICIENT WATER TO MAINTAIN THE MUD AS A FLUID, SUFFICIENT CLAYED MATERIAL TO FORM A FILTER CAKE ON THE WALL OF THE WELL AND A WATER-SOLUBLE SUBSTITUTED CHITIN SELECTED FROM THE GROUP CONSISTING OF THE WATER-SOLUBLE SALTS OF CHITIN SULFATE, CARBOXYMETHYLCHITIN AND CARBOXYETHLCHITIN IN AN AMOUNT SUFFICIENT TO REDUCE THE WATER LOSS DUE TO FILTRATION THROUGH SAID FILTER CAKE WITHOUT INCREASING THE VICOSITY OF SAID DRILLING FLUID TO SUCH AN EXTENT THAT IT CANNOT BE CIRCULATED.
Claim 3
Dependent Claim
43 words
A PROCESS FOR PREPARING CYANOETHYLCHITIN ETHER WHICH COMPRISES REACTING ALKALI CHITIN WITH AN AMOUNT OF ACRYLONITRILE WITHIN THE RANGE OF 0.5 TO 3 PARTS BY WEIGHT PER PART OF SAID ALKALI CHITIN AT A TEMPERATURE WITHIN THE RANGE OF 20 TO 120* F.
Claim 4
Dependent Claim
43 words
A PROCESS FOR PREPARING CYANOETHYLCHITIN ETHER WHICH COMPRISES REACTING ALKALI CHITIN WITH AN AMOUNT OF ACRYLONITRILE WITHIN THE RANGE OF 0.5 TO 3 PARTS BY WEIGHT PER PART OF SAID ALKALI CHITIN AT A TEMPERATURE WITHIN THE RANGE OF 20 TO 120* F.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |