US3044547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permeable well cement and method of providing permeable cement filters in wells
Assignee: Cities Service Research and Development Co
•
Filing: 1958-10-23
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Granted: 1962-07-17
•
Expires: 1978-10-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph R Jarboe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:54
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/008; C04B24/005; C04B24/02; C04B28/00; C04B28/02; C04B28/04; C04B38/00; C04B38/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
229 words
A PUMPABLE CEMENT SLURRY FOR USE IN FORMING A PERMEABLE CEMENT FILTER IN A WELL AND COMPRISING FROM 70 TO 95 PARTS BY WEIGHT OF PORTLAND CEMENT, FROM 1 TO 10 PARTS BY WEIGHT OF ASBESTOS HAVING A FIBER LENGTH OF FROM 1/8 TO 1/2 IN., FROM 4 TO 20 PARTS BY WEIGHT OF A WATER INSOLUBLE SOLID ORGANIC COMPOUND THAT IS SOLUBLE IN HYDROCARBON SOLVENTS AND HAS A MELTING POINT HIGHER THAN THE BOTTOM HOLE WELL TEMPERATURE AND SUFFICIENT WATER TO MAKE THE SLURRY PUMPABLE 9, A METHOD OF PROVIDING A PERMEABLE CEMENT FILTER IN OIL AND GAS WELLS WHICH COMPRISES INTRODUCING INTO THE PRODUCING REGION OF A WELL A CEMENT SLURRY COMPRISING FROM 70 TO 95 PARTS BY WEIGHT OF PORTLAND CEMENT, 1 TO 10 PARTS BY WEIGHT OF ASBESTOS HAVING A FILBER LENGTH OF FROM 1/8 TO 1/2 IN., FROM 4 TO 20 PARTS BY WEIGHT OF A WATER INSOLUBLE SOLID ORGANIC COMPOUND, SOLUBLE IN HYDROCARBON SOLVENTS, HAVING A MELTING POINT HIGHER THAN THE BOTTOM HOLE TEMPERATURE OF THE WELL, ADN SUFFICIENT WATER TO MAKE A PUMPABLE SLURRY, PERMITTING THE SLURRY TO SET ADJACENT TO THE PRODUCING REGION OF THE WELL, DRILLING OUT A PROTION OF THE SET CEMENT BELOW THE END OF THE WELL CASING AND WASHING THE SET CEMENT WITH A HYDROCARBON SOLVENT TO THEREBY EXTRACT THE SOLID ORGANIC COMPOUND FROM THE SET CEMENT.
Claim 2
Dependent Claim
229 words
A PUMPABLE CEMENT SLURRY FOR USE IN FORMING A PERMEABLE CEMENT FILTER IN A WELL AND COMPRISING FROM 70 TO 95 PARTS BY WEIGHT OF PORTLAND CEMENT, FROM 1 TO 10 PARTS BY WEIGHT OF ASBESTOS HAVING A FIBER LENGTH OF FROM 1/8 TO 1/2 IN., FROM 4 TO 20 PARTS BY WEIGHT OF A WATER INSOLUBLE SOLID ORGANIC COMPOUND THAT IS SOLUBLE IN HYDROCARBON SOLVENTS AND HAS A MELTING POINT HIGHER THAN THE BOTTOM HOLE WELL TEMPERATURE AND SUFFICIENT WATER TO MAKE THE SLURRY PUMPABLE 9, A METHOD OF PROVIDING A PERMEABLE CEMENT FILTER IN OIL AND GAS WELLS WHICH COMPRISES INTRODUCING INTO THE PRODUCING REGION OF A WELL A CEMENT SLURRY COMPRISING FROM 70 TO 95 PARTS BY WEIGHT OF PORTLAND CEMENT, 1 TO 10 PARTS BY WEIGHT OF ASBESTOS HAVING A FILBER LENGTH OF FROM 1/8 TO 1/2 IN., FROM 4 TO 20 PARTS BY WEIGHT OF A WATER INSOLUBLE SOLID ORGANIC COMPOUND, SOLUBLE IN HYDROCARBON SOLVENTS, HAVING A MELTING POINT HIGHER THAN THE BOTTOM HOLE TEMPERATURE OF THE WELL, ADN SUFFICIENT WATER TO MAKE A PUMPABLE SLURRY, PERMITTING THE SLURRY TO SET ADJACENT TO THE PRODUCING REGION OF THE WELL, DRILLING OUT A PROTION OF THE SET CEMENT BELOW THE END OF THE WELL CASING AND WASHING THE SET CEMENT WITH A HYDROCARBON SOLVENT TO THEREBY EXTRACT THE SOLID ORGANIC COMPOUND FROM THE SET CEMENT.
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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) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |