Patent US3133195A successfully refreshed from Google Patents.
US3133195A
Expired / Lapsed
US
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Neutron slowing down and absorption logging method
Assignee: California Research LLC
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Filing: 1958-12-05
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Granted: 1964-05-12
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Expires: 1978-12-05
Abstract
No abstract record available.
Inventors
- 👤 Stanley B Jones
- 👤 Delmar O Seevers
- 👤 Walter E Meyerhof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:47
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/101; G01V5/102; H; H05; H05H; H05H3/00; H05H3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
APPARATUS FOR MEASURING THE EPITHERMAL NEUTRON BUILD-UP AND DECAY RATE IN AN EARTH FORMATION TRAVERSED BY A WELL BORE SUBSTANTIALLY INDEPENDENT OF SOURCE INTENSITY AS A MEASURE OF THE FLUID CONTENT OF SAID FORMATION WHICH COMPRISES MEANS FOR POSITIONING A NEUTRON GENERATOR IN THE WELL BORE ADJACENT THE EARTH FORMATION WHOSE FLUID CONTENT IS TO BE MEASURE, MEANS FOR CYCLICALLY PULSING THE OUTPUT OF SAID FAST NEUTRON GENERATOR TO IRRADIATE SAID FORMATION WITH FAST NEUTRONS, ELECTRICAL CIRCUIT MEANS SYNCHRONOUSLY OPEATED WITH THE PULSING OF SAID GENERATOR FOR CONNECTING AN EPITHERMAL NEUTRON DETECTOR TO AT LEAST A PAIR OF TIME ANALYZERS, EACH OF SAID TIME ANALYZERS HAVING A PLURALITY OF CHANNELS FOR RECORDING THE NUMBER OF COUNTS OF A PREDETERMINED MAGNITUDE DURING PREDETERMINED TIME INTERVALS AND IN SEQUENTIAL ORDER, ONE OF SAID TIME ANALYZERS BEING OPERABLE DURING THE INITIAL PORTION OF EACH CYCLIC PULSE FROM SAID GENERATOR WHEN THE EPITHERMAL NEUTRON BUILD-UP RATE IS INCREASING AND THE OTHER OF SAID ANALYZERS BEING OPERABLE AFTER EACH CYCLIC PULSE OF SAID GENERATOR HAS ENDED TO RECORD THE RATE OF EPITHERMAL NEUTRON DECAY IN SAID FORMATION, AND MEANS
Claim 2
Dependent Claim
184 words
APPARATUS FOR MEASURING THE EPITHERMAL NEUTRON BUILD-UP AND DECAY RATE IN AN EARTH FORMATION TRAVERSED BY A WELL BORE SUBSTANTIALLY INDEPENDENT OF SOURCE INTENSITY AS A MEASURE OF THE FLUID CONTENT OF SAID FORMATION WHICH COMPRISES MEANS FOR POSITIONING A NEUTRON GENERATOR IN THE WELL BORE ADJACENT THE EARTH FORMATION WHOSE FLUID CONTENT IS TO BE MEASURE, MEANS FOR CYCLICALLY PULSING THE OUTPUT OF SAID FAST NEUTRON GENERATOR TO IRRADIATE SAID FORMATION WITH FAST NEUTRONS, ELECTRICAL CIRCUIT MEANS SYNCHRONOUSLY OPEATED WITH THE PULSING OF SAID GENERATOR FOR CONNECTING AN EPITHERMAL NEUTRON DETECTOR TO AT LEAST A PAIR OF TIME ANALYZERS, EACH OF SAID TIME ANALYZERS HAVING A PLURALITY OF CHANNELS FOR RECORDING THE NUMBER OF COUNTS OF A PREDETERMINED MAGNITUDE DURING PREDETERMINED TIME INTERVALS AND IN SEQUENTIAL ORDER, ONE OF SAID TIME ANALYZERS BEING OPERABLE DURING THE INITIAL PORTION OF EACH CYCLIC PULSE FROM SAID GENERATOR WHEN THE EPITHERMAL NEUTRON BUILD-UP RATE IS INCREASING AND THE OTHER OF SAID ANALYZERS BEING OPERABLE AFTER EACH CYCLIC PULSE OF SAID GENERATOR HAS ENDED TO RECORD THE RATE OF EPITHERMAL NEUTRON DECAY IN SAID FORMATION, AND MEANS
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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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |