Patent US4894148A successfully refreshed from Google Patents.
Patent US3215837A successfully refreshed from Google Patents.
US3215837A
Expired / Lapsed
US
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Device for calibrating radioactive well logging apparatus
Assignee: Texaco Inc
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Filing: 1959-06-15
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Granted: 1965-11-02
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Expires: 1979-06-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh E Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:00
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/101; G01V5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
APPARATUS FOR CALIBRATION OF AN ELONGATED WELL LOGGING INSTRUMENT COMPRISING A PORTABLE TUBULAR CALIBRATION MEMBER HAVING AN INTERNAL BORE SUITABLE TO RECEIVE THEREIN A LOGGING INSTRUMENT FOR CALIBRATION, SAID TUBULAR MEMBER BEING FORMED IN HYDROGENOUS MATERIAL WHICH IS SUITED TO SIMULATE AN EARTH FORMATION HAVING A PREDETERMINED HYDROGEN CONTENT, A PREDETERMINED QUANTITY OF CHLORINECONTAINING MATERIAL IMBEDDED IN THE HYDROGENOUS MATERIAL AROUND THE TUBULAR MEMBER AT A LOCATION INTERMEDIATE THE CENTER OF THE MEMBER AND ONE END THEREOF, SAID TUBULAR MEMBER BEING MOUNTED FOR ROTATION ABOUT AN AXIS SUBSTANTIALLY TRANSVERSE TO SAID BORE SO THAT A LOGGING INSTRUMENT MAY BE LOWERED INTO THE BORE OF THE MEMBER FROM EITHER END THEREOF.
Claim 2
Dependent Claim
110 words
APPARATUS FOR CALIBRATION OF AN ELONGATED WELL LOGGING INSTRUMENT COMPRISING A PORTABLE TUBULAR CALIBRATION MEMBER HAVING AN INTERNAL BORE SUITABLE TO RECEIVE THEREIN A LOGGING INSTRUMENT FOR CALIBRATION, SAID TUBULAR MEMBER BEING FORMED IN HYDROGENOUS MATERIAL WHICH IS SUITED TO SIMULATE AN EARTH FORMATION HAVING A PREDETERMINED HYDROGEN CONTENT, A PREDETERMINED QUANTITY OF CHLORINECONTAINING MATERIAL IMBEDDED IN THE HYDROGENOUS MATERIAL AROUND THE TUBULAR MEMBER AT A LOCATION INTERMEDIATE THE CENTER OF THE MEMBER AND ONE END THEREOF, SAID TUBULAR MEMBER BEING MOUNTED FOR ROTATION ABOUT AN AXIS SUBSTANTIALLY TRANSVERSE TO SAID BORE SO THAT A LOGGING INSTRUMENT MAY BE LOWERED INTO THE BORE OF THE MEMBER FROM EITHER END THEREOF.
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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |