Patent US2660561A successfully refreshed from Google Patents.
US2660561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating drilling fluids to reduce water losses
Assignee: ExxonMobil Oil Corp
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Filing: 1950-08-28
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Granted: 1953-11-24
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Expires: 1970-08-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:37
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/003; Y; Y10; Y10S; Y10S507/00; Y10S507/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD OF TREATING AN AQUEOUS DRILLING FLUID TO REDUCE THE WATER LOSS OF SAID DRILLING FLUID COMPRISING ADDING THERETO KARAYA GUM WHICH HAS BEEN PREVIOUSLY HEATED IN THE DRY STATE AT A TEMPERATURE OF AT LEAST ABOUT 90* C. BUT NOT ABOVE ABOUT 100* C. AND FOR THE TIME NOT LESS THAN ABOUT THAT GIVEN BY THE EXPRESSION T=28-.2T, WHERE T IS THE TIME IN HOURS AND T IS THE TEMPERATURE IN DEGRESS CENTIGRADE.
Claim 2
Independent Claim
75 words
A METHOD OF TREATING AN AQUEOUS DRILLING FLUID TO REDUCE THE WATER LOSS OF SAID DRILLING FLUID COMPRISING ADDING THERETO KARAYA GUM WHICH HAS BEEN PREVIOUSLY HEATED IN THE DRY STATE AT A TEMPERATURE OF AT LEAST ABOUT 90* C. BUT NOT ABOVE ABOUT 100* C. AND FOR THE TIME NOT LESS THAN ABOUT THAT GIVEN BY THE EXPRESSION T=28-.2T, WHERE T IS THE TIME IN HOURS AND T IS THE TEMPERATURE IN DEGRESS CENTIGRADE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |