US3291248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic logging systems
Assignee: Schlumberger Technology Corp
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Filing: 1960-03-30
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Granted: 1966-12-13
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Expires: 1980-03-30
Abstract
No abstract record available.
Inventors
- 👤 Majani Pierre
- 👤 Alan V Rushton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:13
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; G01V1/48; G01V1/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
THE METHOD OF INVESTIGATING THE QUALITY OF THE BONDING OF AN ANNULUS OF CEMENT TO A METALLIC CASING WHICH HAS BEEN CEMENTED IN A BOREHOLE COMPRISING THE STEPS OF: PROBING INTERVALS OF THE CASING WITH ACOUSTIC ENERGY TRAVELING BETWEEN SPACED LOCATIONS; SETTING THE ENERGY LEVEL AT WHICH ACOUSTIC ENERGY IS DETECTED TO OBTAIN SENSIBLE INDICATIONS OF THE TRAVEL TIME OF ACOUSTIC ENERGY THROUGH THE CASING BETWEEN THE SPECED LOCATIONS AT AN INTERVAL ALONG THE BORE WHERE THE CASING IS NOT BONDED TO THE CEMENT; RE-SETTING THE ENERGY LEVEL AT WHICH ACOUSTIC ENERGY IS DETECTED TO OBTAIN SENSIBLE INDICATIONS OF THE TRAVEL TIME OF ACOUSTIC ENERGY THROUGH THE CASING BETWEEN SPACED LOCATIONS AT AN INTERVAL ALONG THE BORE WHERE THE CASING IS BONDED TO THE CEMENT; AND THEREAFTER FINALLY SETTING THE ENERGY LEVEL AT WHICH ACOUSTIC ENERGY IS DETECTED TO OBTAIN SENSIBLE INDICATIONS DIFFERENTIATING BETWEEN THE TRAVEL TIME OF ACOUSTIC ENERGY BETWEEN SAID SPACED LOCATIONS THROUGH A CEMENT BONDED CASING AND A CASING WHICH IS NOT BONDED TO THE CEMENT.
Claim 2
Independent Claim
169 words
THE METHOD OF INVESTIGATING THE QUALITY OF THE BONDING OF AN ANNULUS OF CEMENT TO A METALLIC CASING WHICH HAS BEEN CEMENTED IN A BOREHOLE COMPRISING THE STEPS OF: PROBING INTERVALS OF THE CASING WITH ACOUSTIC ENERGY TRAVELING BETWEEN SPACED LOCATIONS; SETTING THE ENERGY LEVEL AT WHICH ACOUSTIC ENERGY IS DETECTED TO OBTAIN SENSIBLE INDICATIONS OF THE TRAVEL TIME OF ACOUSTIC ENERGY THROUGH THE CASING BETWEEN THE SPECED LOCATIONS AT AN INTERVAL ALONG THE BORE WHERE THE CASING IS NOT BONDED TO THE CEMENT; RE-SETTING THE ENERGY LEVEL AT WHICH ACOUSTIC ENERGY IS DETECTED TO OBTAIN SENSIBLE INDICATIONS OF THE TRAVEL TIME OF ACOUSTIC ENERGY THROUGH THE CASING BETWEEN SPACED LOCATIONS AT AN INTERVAL ALONG THE BORE WHERE THE CASING IS BONDED TO THE CEMENT; AND THEREAFTER FINALLY SETTING THE ENERGY LEVEL AT WHICH ACOUSTIC ENERGY IS DETECTED TO OBTAIN SENSIBLE INDICATIONS DIFFERENTIATING BETWEEN THE TRAVEL TIME OF ACOUSTIC ENERGY BETWEEN SAID SPACED LOCATIONS THROUGH A CEMENT BONDED CASING AND A CASING WHICH IS NOT BONDED TO THE CEMENT.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |