Patent US2951946A successfully refreshed from Google Patents.
US2951946A
Expired / Lapsed
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Method and apparatus for logging earth formations
Assignee: Schlumberger Well Surveying Corp
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Filing: 1955-11-09
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Granted: 1960-09-06
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Expires: 1975-11-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh B Frey
- 👤 Goodman Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:31
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/104
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A METHOD OF LOGGING EARTH FORMATIONS TRAVERSED BY A BOREHOLE WHICH COMPRISES THE STEPS OF LOWERING A HOUSING CONTAINING A SOLUTION CAPABLE OF NUCLEAR CHAIN REACTING INTO SAID BOREHOLE, THE POWER LEVEL OF THE REACTION OF SAID SOLUTION BEING UNDER THE INFLUENCE OF THE EARTH FORMATIONS, CONTROLLING SAID REACTION TO MAINTAIN A PREDETERMINED POWER LEVEL BY CONTROLLING THE POSITION OF A NEUTRON ABSORBER RELATIVE TO THE POSITION OF SAID SOLUTION,
Claim 2
Independent Claim
70 words
A METHOD OF LOGGING EARTH FORMATIONS TRAVERSED BY A BOREHOLE WHICH COMPRISES THE STEPS OF LOWERING A HOUSING CONTAINING A SOLUTION CAPABLE OF NUCLEAR CHAIN REACTING INTO SAID BOREHOLE, THE POWER LEVEL OF THE REACTION OF SAID SOLUTION BEING UNDER THE INFLUENCE OF THE EARTH FORMATIONS, CONTROLLING SAID REACTION TO MAINTAIN A PREDETERMINED POWER LEVEL BY CONTROLLING THE POSITION OF A NEUTRON ABSORBER RELATIVE TO THE POSITION OF SAID SOLUTION,
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) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |