Patent US2727155A successfully refreshed from Google Patents.
US2727155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scattered gamma ray well logging
Assignee: Texaco Inc
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Filing: 1951-03-03
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Granted: 1955-12-13
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Expires: 1971-03-03
Abstract
No abstract record available.
Inventors
- 👤 Herzog Gerhard
- 👤 Alexander S Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:51
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
AN INSTRUMENT FOR LOGGING THE FORMATIONS TRAVERSED BY A WELL BORE HOLE COMPRISING AN ELONGATED HOUSING ADAPTED TO BE PASSED THROUGH SAID HOLE WHILE SUSPENDED FROM A CONDUCTOR CABLE, A SOURCE OF GAMMA RAYS DISPOSED ON THE VERTICAL AXIS OF SAID HOUSING, A GAMMA RAY DETECTOR ALSO DISPOSED IN SAID HOUSING, AND VERTICALLLY SPACED FROM SAID SOURCE BY A DISTANCE FROM TWO TO THREE TIMES THE DIAMETER OF THE BORE HOLE AND A GAMMA RAY ABSORBING SHIELDS BETWEEN SAID SOURCE AND SAID DETECTOR, THE LOWER END OF SAID SHIELD BEING SUBSTANTIALLY HORIZONTAL AND SPACED FROM SAID SOURCE APPROXIMATELY ONE INCH SO THAT GAMMA RAYS FROM THE SOURCE WHICH PASS INTO THE SURROUNDING FORMATIONS TO BE SCATTERED UPWARDLY
Claim 2
Dependent Claim
117 words
AN INSTRUMENT FOR LOGGING THE FORMATIONS TRAVERSED BY A WELL BORE HOLE COMPRISING AN ELONGATED HOUSING ADAPTED TO BE PASSED THROUGH SAID HOLE WHILE SUSPENDED FROM A CONDUCTOR CABLE, A SOURCE OF GAMMA RAYS DISPOSED ON THE VERTICAL AXIS OF SAID HOUSING, A GAMMA RAY DETECTOR ALSO DISPOSED IN SAID HOUSING, AND VERTICALLLY SPACED FROM SAID SOURCE BY A DISTANCE FROM TWO TO THREE TIMES THE DIAMETER OF THE BORE HOLE AND A GAMMA RAY ABSORBING SHIELDS BETWEEN SAID SOURCE AND SAID DETECTOR, THE LOWER END OF SAID SHIELD BEING SUBSTANTIALLY HORIZONTAL AND SPACED FROM SAID SOURCE APPROXIMATELY ONE INCH SO THAT GAMMA RAYS FROM THE SOURCE WHICH PASS INTO THE SURROUNDING FORMATIONS TO BE SCATTERED UPWARDLY
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) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |