US3245814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementing of high temperature wells
Assignee: ExxonMobil Oil Corp
•
Filing: 1964-04-09
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Granted: 1966-04-12
•
Expires: 1984-04-09
Abstract
No abstract record available.
Inventors
- 👤 Irving R Dunlap
- 👤 Freeman D Patchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:01
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/38; C04B24/383
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A CEMENT FOR CEMENTING IN A WELL-BORE HOLE AT A POSITION ADJACENT TO AN EARTH FORMATION PENETRATED BY SAID WELL-BORE HOLE AND HAVING A TEMPERATURE AT LEAST AS GREAT AS 180*F. COMPRISING HYDRAULIC CEMENT ADMIXED WITH, AS THE SOLE AGENT FOR INCREASING THE SETTING TIME OF SAID CEMENT, CARBOXYMETHYLHYDROXYETHYL CELLULOSE IN AN AMOUNT IN THE RANGE OF 0.05 TO 0.2 PERCENT BY WEIGHT OF SAID HYDRAULIC CEMENT AND TO PROVIDE A SET CEMENT HAVING A TWENTY-FOUR HOUR COMPRESSIVE STRENGTH WHEN SET AT SAID TEMPERATURE OF AT LEAST 800 POUNDS PER SQUARE INCH.
Claim 2
Dependent Claim
92 words
A CEMENT FOR CEMENTING IN A WELL-BORE HOLE AT A POSITION ADJACENT TO AN EARTH FORMATION PENETRATED BY SAID WELL-BORE HOLE AND HAVING A TEMPERATURE AT LEAST AS GREAT AS 180*F. COMPRISING HYDRAULIC CEMENT ADMIXED WITH, AS THE SOLE AGENT FOR INCREASING THE SETTING TIME OF SAID CEMENT, CARBOXYMETHYLHYDROXYETHYL CELLULOSE IN AN AMOUNT IN THE RANGE OF 0.05 TO 0.2 PERCENT BY WEIGHT OF SAID HYDRAULIC CEMENT AND TO PROVIDE A SET CEMENT HAVING A TWENTY-FOUR HOUR COMPRESSIVE STRENGTH WHEN SET AT SAID TEMPERATURE OF AT LEAST 800 POUNDS PER SQUARE INCH.
References Cited (Backward Citations)
US2995189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |