Patent US2627598A successfully refreshed from Google Patents.
US2936375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactivity bore hole logging
Assignee: Texaco Inc
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Filing: 1955-12-27
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Granted: 1960-05-10
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Expires: 1975-12-27
Abstract
No abstract record available.
Inventors
- 👤 Alexander S Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
THE METHOD OF MAKING AN IMPROVED INDUCED GAMMA RAY LOG TO DETERMINE THE HYDROGEN CONTENT OF EARTH FORMATIONS TRAVERSED BY A BORE HOLE WHICH COMPRISES PASSING THROUGH THE HOLE A SOURCE OF NEUTRONS SO AS TO BOMBARD SAID FORMATIONS THEREBY AND INDUCE GAMMA RAYS THERIN, DETECTING THE INTENSITY OF SAID INDUCED GAMMA RAYS IN A ZONE IN THE HOLE NEAR SAID SOURCE, RECORDING ON A MOVING STRIP A CURVE OF THE INTENSITY OF THE DETECTED INDUCED GAMMA RAYS IN CORRELATION WITH DEPTH IN THE HOLE, SIMULTANEOUSLY VARYING A VOLTAGE IN ACCORDANCE WITH VARIATIONS IN THE DIAMETER OF SAID BORE HOLE OPPOSITE SAID ZONE, SIMULTANEOUSLY RECORDING ON SAID STRIP IN CORRELATION WITH DEPTH IN THE HOLE A PLURALITY OF REFERENCE CURVES EACH CORRESPONDING TO A DIFFERENT VALUE OF SAID VARYING VOLTAGE AND THUS TO DIFFERENT VALUES OF THE HYDROGEN CONTENT IN THE MATERIAL SURROUNDING SAID SOURCE, IN ORDER TO PROVIDE A RECORD WITH THE INDUCED GAMMA RAY CURVE PLOTTED IN CORRELATION WITH CORRECTED REFERENCE CURVES.
Claim 2
Independent Claim
164 words
THE METHOD OF MAKING AN IMPROVED INDUCED GAMMA RAY LOG TO DETERMINE THE HYDROGEN CONTENT OF EARTH FORMATIONS TRAVERSED BY A BORE HOLE WHICH COMPRISES PASSING THROUGH THE HOLE A SOURCE OF NEUTRONS SO AS TO BOMBARD SAID FORMATIONS THEREBY AND INDUCE GAMMA RAYS THERIN, DETECTING THE INTENSITY OF SAID INDUCED GAMMA RAYS IN A ZONE IN THE HOLE NEAR SAID SOURCE, RECORDING ON A MOVING STRIP A CURVE OF THE INTENSITY OF THE DETECTED INDUCED GAMMA RAYS IN CORRELATION WITH DEPTH IN THE HOLE, SIMULTANEOUSLY VARYING A VOLTAGE IN ACCORDANCE WITH VARIATIONS IN THE DIAMETER OF SAID BORE HOLE OPPOSITE SAID ZONE, SIMULTANEOUSLY RECORDING ON SAID STRIP IN CORRELATION WITH DEPTH IN THE HOLE A PLURALITY OF REFERENCE CURVES EACH CORRESPONDING TO A DIFFERENT VALUE OF SAID VARYING VOLTAGE AND THUS TO DIFFERENT VALUES OF THE HYDROGEN CONTENT IN THE MATERIAL SURROUNDING SAID SOURCE, IN ORDER TO PROVIDE A RECORD WITH THE INDUCED GAMMA RAY CURVE PLOTTED IN CORRELATION WITH CORRECTED REFERENCE CURVES.
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) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |