US2670442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactivity borehole logging apparatus
Assignee: Texaco Inc
•
Filing: 1950-04-25
•
Granted: 1954-02-23
•
Expires: 1970-04-25
Abstract
No abstract record available.
Inventors
- 👤 Herzog Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:48
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/06; G01V5/08; G01V5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A DEVICE FOR LOGGING A BORE HOLE COMPRISING AN ELONGATED INSTRUMENT HOUSING ADAPTED TO BE PASSED THROUGH THE BORE HOLE WHILE SUSPENDED ON A CONDUCTOR CABLE, A SOURCE OF NEUTRONS AND GAMMA RAYS DISPOSED IN A FIXED POSITION NEAR THE BOTTOM OF SAID HOUSING, A DETECTOR FOR SECONDARY RADIATION PRODUCED BY NEUTRON BOMBARDMENT OF THE SURROUNDING FORMATIONS MOUNTED ABOVE AND IN CLOSE PROXIMITY TO SAID SOURCE, A LAYER OF GAMMA RAY ABSORBING MATERIAL BETWEEN SAID SOURCE AND SAID DETECTOR, A NATURAL GAMMA RAY DETECTOR DISPOSED IN A FIXED POSITION IN THE UPPER END OF SAID HOUSING AND SEPARATED FROM SAID SOURCE SUFFICIENTLY FAR TO BE OUT OF REACH OF GAMMA RAYS FROM THE SOURCE SCATTERED IN TE MATERIAL AROUND SAID HOUSING, MEANS WITHIN THE HOUSING FOR AMPLIFYING THE OUTPUTS OF TH TWO DETECTORS AND TRANSMITTING SAID OUTPUTS UPWARDLY OVER SAID CABLE, AND MEANS AT THE SURFACE FOR RECORDING THE OUTPUTS OF SAID TWO DETECTORS IN CORRELATION TO THE DEPTH OF THE INSTRUMENT IN THE BORE HOLE.
Claim 2
Independent Claim
166 words
A DEVICE FOR LOGGING A BORE HOLE COMPRISING AN ELONGATED INSTRUMENT HOUSING ADAPTED TO BE PASSED THROUGH THE BORE HOLE WHILE SUSPENDED ON A CONDUCTOR CABLE, A SOURCE OF NEUTRONS AND GAMMA RAYS DISPOSED IN A FIXED POSITION NEAR THE BOTTOM OF SAID HOUSING, A DETECTOR FOR SECONDARY RADIATION PRODUCED BY NEUTRON BOMBARDMENT OF THE SURROUNDING FORMATIONS MOUNTED ABOVE AND IN CLOSE PROXIMITY TO SAID SOURCE, A LAYER OF GAMMA RAY ABSORBING MATERIAL BETWEEN SAID SOURCE AND SAID DETECTOR, A NATURAL GAMMA RAY DETECTOR DISPOSED IN A FIXED POSITION IN THE UPPER END OF SAID HOUSING AND SEPARATED FROM SAID SOURCE SUFFICIENTLY FAR TO BE OUT OF REACH OF GAMMA RAYS FROM THE SOURCE SCATTERED IN TE MATERIAL AROUND SAID HOUSING, MEANS WITHIN THE HOUSING FOR AMPLIFYING THE OUTPUTS OF TH TWO DETECTORS AND TRANSMITTING SAID OUTPUTS UPWARDLY OVER SAID CABLE, AND MEANS AT THE SURFACE FOR RECORDING THE OUTPUTS OF SAID TWO DETECTORS IN CORRELATION TO THE DEPTH OF THE INSTRUMENT IN THE BORE HOLE.
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |