Patent US3102251A successfully refreshed from Google Patents.
US3102251A
Expired / Lapsed
US
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Acoustic logging apparatus
Assignee: Schlumberger Well Surveying Corp
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Filing: 1959-10-30
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Granted: 1963-08-27
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Expires: 1979-10-30
Abstract
No abstract record available.
Inventors
- 👤 Robert B Blizard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:31
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; G01V1/48; G01V1/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD OF WELL LOGGING WHICH COMPRISE PROBING WITH ACOUSTIC PULSES SEGMENTS OF CONSTANT LENGTH ALONG A BORE BY PERIODICALLY CAUSING AN EMISSION OF AN ACOUSTIC SIGNAL AT FIRST LOCATIONS ALONG THE BORE AND SENSING THE ARRIVAL OF THE ACOUSTIC PULSE AT SECOND AND THIRD LOCATIONS ALONG THE BORE AT A FIXED DISTANCE FROM ONE ANOTHER AND FROM SAID FIRST LOCATIONS, DEVELOPING SIGNALS REPRESENTATIVE OF ACOUSTIC PULSES ARRIVING AT SAID SECOND AND THIRD LOCATIONS, DEVELOPING DECAY FUNCTIONS OF PEAK AMPLITUDE VALUES OF SAID DEVELOPED SIGNALS AT SAID SECOND AND THIRD LOCATIONS, AND DERIVING INDICATIONS OF THE TIME INTERVAL BETWEEN THE TIME AT WHICH A PEAK AMPLITUDE OCCURS AT THE SECOND LOCATION AND THE TIME AT WHICH THE VALUE OF THE DECAY FUNCTIONS ARE EQUAL.
Claim 2
Independent Claim
124 words
A METHOD OF WELL LOGGING WHICH COMPRISE PROBING WITH ACOUSTIC PULSES SEGMENTS OF CONSTANT LENGTH ALONG A BORE BY PERIODICALLY CAUSING AN EMISSION OF AN ACOUSTIC SIGNAL AT FIRST LOCATIONS ALONG THE BORE AND SENSING THE ARRIVAL OF THE ACOUSTIC PULSE AT SECOND AND THIRD LOCATIONS ALONG THE BORE AT A FIXED DISTANCE FROM ONE ANOTHER AND FROM SAID FIRST LOCATIONS, DEVELOPING SIGNALS REPRESENTATIVE OF ACOUSTIC PULSES ARRIVING AT SAID SECOND AND THIRD LOCATIONS, DEVELOPING DECAY FUNCTIONS OF PEAK AMPLITUDE VALUES OF SAID DEVELOPED SIGNALS AT SAID SECOND AND THIRD LOCATIONS, AND DERIVING INDICATIONS OF THE TIME INTERVAL BETWEEN THE TIME AT WHICH A PEAK AMPLITUDE OCCURS AT THE SECOND LOCATION AND THE TIME AT WHICH THE VALUE OF THE DECAY FUNCTIONS ARE EQUAL.
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) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |