US2568992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment for drilling fluids
Assignee: Oil Well Chemical and Materials Co
•
Filing: 1947-10-22
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Granted: 1951-09-25
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Expires: 1967-10-22
Abstract
No abstract record available.
Inventors
- 👤 Doscher Todd Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:06
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
99 words
AN IMPROVED DRILLING FLUID FOR OIL AND GAS WELLS COMPRISING A CLAY, WATER FLUID OF SUITABLE VISCOSITY FOR USE IN OIL AND GAS WELL DRILLING TO WHICH HAS BEEN ADDED AN AMOUNT OF A PREFERENTIALLY OIL SOLUBLE HIGH MOLECULAR WEIGHT ALKALI METAL ALKYL ARYL PETROLEUM SULPHONATE SUFFICIENT TO SUBSTANTIALLY REDUCE THE FLUID LOSS OF SAID CLAY WATER DRILLING FLUID AND AN AMOUNT OF PETROLEUM OIL AS AN ANTIFOAMING AGENT AT LEAST SUFFICIENT TO INHIBIT FOAMING OF THE RESULTING DRILLING FLUID, SAID SULPHONATE BEING FURTHER CHARACTERIZED BY BEING COMPATIBLE WITH BOTH SAID WATER BASE DRILLING FLUID AND SAID ANTIFOAMING AGENT.
Claim 2
Dependent Claim
99 words
AN IMPROVED DRILLING FLUID FOR OIL AND GAS WELLS COMPRISING A CLAY, WATER FLUID OF SUITABLE VISCOSITY FOR USE IN OIL AND GAS WELL DRILLING TO WHICH HAS BEEN ADDED AN AMOUNT OF A PREFERENTIALLY OIL SOLUBLE HIGH MOLECULAR WEIGHT ALKALI METAL ALKYL ARYL PETROLEUM SULPHONATE SUFFICIENT TO SUBSTANTIALLY REDUCE THE FLUID LOSS OF SAID CLAY WATER DRILLING FLUID AND AN AMOUNT OF PETROLEUM OIL AS AN ANTIFOAMING AGENT AT LEAST SUFFICIENT TO INHIBIT FOAMING OF THE RESULTING DRILLING FLUID, SAID SULPHONATE BEING FURTHER CHARACTERIZED BY BEING COMPATIBLE WITH BOTH SAID WATER BASE DRILLING FLUID AND SAID ANTIFOAMING AGENT.
References Cited (Backward Citations)
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US2151029A
Cited
US2217926A
Cited
US2216955A
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US2331049A
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US2360992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |