US2545169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating weighted muds for viscosity reduction
Assignee: Standard Oil Development Co
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Filing: 1949-09-14
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Granted: 1951-03-13
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Expires: 1969-09-14
Abstract
No abstract record available.
Inventors
- 👤 Richard A Salathiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:50
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
100 words
A PROCESS FOR CONTROLLING THE VISCOSITY AND GEL STRENGTH OF AN AQUEOUS DRILLING FLUID CONTAINING CLAY AND WEIGHTING MATERIAL WHICH COMPRISES ADJUSTING THE CLAY CONTENT OF THE FLUID TO A VALUE SUFFICIENT TO MAINTAIN THE WEIGHTING MATERIAL IN SUSPENSION IN THE FLUID OF ADJUSTED CLAY CONTENT AND ADDING TO THE FLUID OF ADJUSTED CLAY CONTENT A VISCOSITY REDUCING QUANTITY OF AN ALKALI METAL SALT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CARBOXYLATED BENZENE AND ALKYL SUBSTITUTED CARBOXYLATED BENZENE IN WHICH THE BENZENE NUCLEI OF SAID MATERIAL CONTAINS AT LEAST 3 CARBON ATOMS TO WHICH CARBOXYL GROUPS ARE ATTACHED.
Claim 2
Dependent Claim
100 words
A PROCESS FOR CONTROLLING THE VISCOSITY AND GEL STRENGTH OF AN AQUEOUS DRILLING FLUID CONTAINING CLAY AND WEIGHTING MATERIAL WHICH COMPRISES ADJUSTING THE CLAY CONTENT OF THE FLUID TO A VALUE SUFFICIENT TO MAINTAIN THE WEIGHTING MATERIAL IN SUSPENSION IN THE FLUID OF ADJUSTED CLAY CONTENT AND ADDING TO THE FLUID OF ADJUSTED CLAY CONTENT A VISCOSITY REDUCING QUANTITY OF AN ALKALI METAL SALT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CARBOXYLATED BENZENE AND ALKYL SUBSTITUTED CARBOXYLATED BENZENE IN WHICH THE BENZENE NUCLEI OF SAID MATERIAL CONTAINS AT LEAST 3 CARBON ATOMS TO WHICH CARBOXYL GROUPS ARE ATTACHED.
References Cited (Backward Citations)
US2295067A
Cited
US2331280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |