US3174577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic logging in casing
Assignee: Schlumberger Well Surveying Corp
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Filing: 1959-07-03
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Granted: 1965-03-23
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Expires: 1979-07-03
Abstract
No abstract record available.
Inventors
- 👤 Leman M Holley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:13
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; G01V1/48; G01V1/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF INVESTIGATING THE PROTERTIES OF EARTH FORMATIONS WHICH ARE TRAVERSED BY A BOREHOLE CONTAINING A METALLIC CASING WHICH HAS BEEN CEMENTED TO THE FORMATIONS COMPRISING THE STEPS OF: GENERATING A SHARP PULSE OF ACOUSTIC ENERGY WITHIN THE BOREHOLE THEREIN THE ACOUSTIC ENERGY TRAVELS FROM A FIRST LOCATION THROUGH BOTH THE CASING AND EARTH FORMATIONS; INTERCEPTING ACOUSTIC ENERGY AT A SECOND LOCATION ALONG SAID BOREHOLE SPACED FROM SAID FIRST LOCATION; DERIVING ELECTRICAL SIGNALS REPRESENTATIVE OF THE ACOUSTIC ENERGY AT EACH OF SAID FIRST AND SECOND LOCATIONS, THE SIGNAL DERIVED AT AT LEAST ONE OF SAID LOCATIONS REPRESENTING ENERGY PASSING THROUGH SAID CASING
Claim 2
Independent Claim
103 words
THE METHOD OF INVESTIGATING THE PROTERTIES OF EARTH FORMATIONS WHICH ARE TRAVERSED BY A BOREHOLE CONTAINING A METALLIC CASING WHICH HAS BEEN CEMENTED TO THE FORMATIONS COMPRISING THE STEPS OF: GENERATING A SHARP PULSE OF ACOUSTIC ENERGY WITHIN THE BOREHOLE THEREIN THE ACOUSTIC ENERGY TRAVELS FROM A FIRST LOCATION THROUGH BOTH THE CASING AND EARTH FORMATIONS; INTERCEPTING ACOUSTIC ENERGY AT A SECOND LOCATION ALONG SAID BOREHOLE SPACED FROM SAID FIRST LOCATION; DERIVING ELECTRICAL SIGNALS REPRESENTATIVE OF THE ACOUSTIC ENERGY AT EACH OF SAID FIRST AND SECOND LOCATIONS, THE SIGNAL DERIVED AT AT LEAST ONE OF SAID LOCATIONS REPRESENTING ENERGY PASSING THROUGH SAID CASING
References Cited (Backward Citations)
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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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |