US3340929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cementing wells
Assignee: Halliburton Co
•
Filing: 1965-07-27
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Granted: 1967-09-12
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Expires: 1985-07-27
Abstract
No abstract record available.
Inventors
- 👤 Knox A Slagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:24
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
THE METHOD OF CEMENTING PIPE IN A WELL TRAVERSING A PRODUCING ZONE HAVING AT LEAST SOME SHALE COMPOSITION WHICH COMPRISES PLACING INTO THE ANNULAR SPACE BETWEEN THE PIPE AND THE WELL BORE A PUMPABLE PORTLAND CEMENT SLURRY CONTAINING FROM ABOUT 5% BY WEIGHT OF THE WATER IN THE SLURRY UP TO THE AMOUNT NECESSARY TO SATURATE THE WATER OF A METAL SALT OF SULFURIC ACID AND THEREAFTER PERMITTING THE SLURRY TO CURE WITHIN THE ANNULAR SPACE TO PROVIDE IMPROVED BONDING OF THE CEMENT TO THE PIPE AND TO THE SHALE FORMATION.
References Cited (Backward Citations)
GB805848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |