US3360046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementing compositions for maximum thermal insulation
Assignee: Halliburton Co
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Filing: 1965-02-08
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Granted: 1967-12-26
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Expires: 1985-02-08
Abstract
No abstract record available.
Inventors
- 👤 Billy J Johnson
- 👤 George Charles Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:24
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; E; E21; E21B; E21B33/00; E21B33/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
THE METHOD OF LINING THE BORE HOLE OF A WELL WITH A THERMALLY INSULATING CEMENT SHEATH WHICH COMPRISES INJECTING INTO THE WELL A NOVEL PUMPABLE CEMENT SLURRY COMPOSITION COMPRISING CEMENT, ABOUT 25% TO 40% SILICA FLOUR, FROM 10% TO ABOUT 150% OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF VERMICULITE AND PERLITE, ALL PERCENTAGES BEING BASED ON THE WEIGHT OF CEMENT, AND FROM 10 GALLONS TO ABOUT 30 GALLONS OF WATER PER SACK OF CEMENT, BASED ON A 94 LBS. SACK, AND PERMITTING SAID COMPOSITION TO SET IN SAID BORE HOLE TO FROM A THERMALLY INSULATING CEMENT LINING HAVING ADEQUATE COMPRESSIVE STRENGTH OVER THE RANGE OF TEMPERATURES ENCOUNTERED IN THE WELL AND BEING CAPABLE OF WITHSTANDING THE FORCES ENCOUNTERED IN SAID WELL.
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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) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |