US3385969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutron thermalization analysis
Assignee: Schlumberger Technology Corp
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Filing: 1962-09-11
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Granted: 1968-05-28
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Expires: 1982-09-11
Abstract
No abstract record available.
Inventors
- 👤 William B Nelligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:12
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/107; G01V5/108
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD FOR DERIVING INDICATIONS OF THE MOLECULAR COMPOSITION OR STATE OF HYDROGEN COMPOUNDS IN EARTH FORMATIONS TRAVERSED BY A BOREHOLE, COMPRISING THE STEPS OF IRRADIATING SAID FORMATIONS WITH SUCCESSIVE BURSTS OF RELATIVELY FAST NEUTRONS FROM A SOURCE IN THE BOREHOLE, DETECTING NEUTRONS RETURNING TO THE BOREHOLE AT FIRST AND SECOND POINTS SPACED AT DIFFERENT DISTANCS THEREALONG FROM SAID SOURCE, SAID NEUTRONS BEING DETECTED AT EACH OF SAID POINTS INTERMEDIATE SUCH BURSTS WITH ENERGIES WHICH ARE SUBSTANTIALLY SOLELY IN AT LEAST ONE PRESELECTED BAND HAVING A LOWER LIMIT SLIGHTLY ABOVE THE ENERGY OF THERMAL EQUILIBRIUM AND AN UPPER LIMIT LESS THAN 1.0 ELECTRON VOLT, AND RECORDING INDICATIONS CORRELEATED WITH DEPTH WHICH VARY IN ACCORDANCE WITH THE RATE AT WHICH NEUTRONS ARE DETECTED AT EACH OF SAID POINTS IN THE PRESELECTED ENERGY BAND.
Claim 2
Independent Claim
132 words
A METHOD FOR DERIVING INDICATIONS OF THE MOLECULAR COMPOSITION OR STATE OF HYDROGEN COMPOUNDS IN EARTH FORMATIONS TRAVERSED BY A BOREHOLE, COMPRISING THE STEPS OF IRRADIATING SAID FORMATIONS WITH SUCCESSIVE BURSTS OF RELATIVELY FAST NEUTRONS FROM A SOURCE IN THE BOREHOLE, DETECTING NEUTRONS RETURNING TO THE BOREHOLE AT FIRST AND SECOND POINTS SPACED AT DIFFERENT DISTANCS THEREALONG FROM SAID SOURCE, SAID NEUTRONS BEING DETECTED AT EACH OF SAID POINTS INTERMEDIATE SUCH BURSTS WITH ENERGIES WHICH ARE SUBSTANTIALLY SOLELY IN AT LEAST ONE PRESELECTED BAND HAVING A LOWER LIMIT SLIGHTLY ABOVE THE ENERGY OF THERMAL EQUILIBRIUM AND AN UPPER LIMIT LESS THAN 1.0 ELECTRON VOLT, AND RECORDING INDICATIONS CORRELEATED WITH DEPTH WHICH VARY IN ACCORDANCE WITH THE RATE AT WHICH NEUTRONS ARE DETECTED AT EACH OF SAID POINTS IN THE PRESELECTED ENERGY BAND.
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) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |