US3263083A
Expired / Lapsed
US
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High resolution apparatus using a gamma ray source and detector for investigating earth formations
Assignee: Schlumberger Well Surveying Corp
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Filing: 1958-10-20
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Granted: 1966-07-26
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Expires: 1978-10-20
Abstract
No abstract record available.
Inventors
- 👤 Johnson Frank Fawcett
- 👤 Tittman Jay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:56
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
APPARATUS FOR INVESTIGATING EARTH FORMATIONS TRAVERSED BY A WELL BOREHOLE COMPRISING AN INSTRUMENT ADAPTED TO BE PASSED THROUGH THE BOREHOLE AND INCLUDING A WALL-ENGAGING FACE; MEANS FOR MAINTAINING SAID WALLENGAGING FACE IN ENGAGEMENT WITH THE SIDEWALL OF THE BOREHOLE; A SOURCE OF GRAMMA RADIATION, HAVING AN ENERGY OF AT LEAST 250 KEV. BUT NO GREATER THAN 800 KEV. SO THAT A HIGH DENSITY ROSULUTION RESULTING FROM LOW TRANSMISSION IN FORMATION MATERIAL OCCURS, SUPPORTED WITHIN SAID INSTRUMENT IN THE VICINITY OF SAID WALL-ENGAGING FACE; AND A DETECTION SYSTEM INCLUDING A GAMMA-RAY-RESPONSIVE DEVICE SUPPORTED WITHIN SAID INSTRUMENT IN THE VICINITY OF SAID WALL-ENGAGING FACE AND IN LONGITUDINALLY SPACED RELATION FROM SAID SOURCE RELATIVE TO THE AXIS OF THE BOREHOLE.
Claim 2
Dependent Claim
117 words
APPARATUS FOR INVESTIGATING EARTH FORMATIONS TRAVERSED BY A WELL BOREHOLE COMPRISING AN INSTRUMENT ADAPTED TO BE PASSED THROUGH THE BOREHOLE AND INCLUDING A WALL-ENGAGING FACE; MEANS FOR MAINTAINING SAID WALLENGAGING FACE IN ENGAGEMENT WITH THE SIDEWALL OF THE BOREHOLE; A SOURCE OF GRAMMA RADIATION, HAVING AN ENERGY OF AT LEAST 250 KEV. BUT NO GREATER THAN 800 KEV. SO THAT A HIGH DENSITY ROSULUTION RESULTING FROM LOW TRANSMISSION IN FORMATION MATERIAL OCCURS, SUPPORTED WITHIN SAID INSTRUMENT IN THE VICINITY OF SAID WALL-ENGAGING FACE; AND A DETECTION SYSTEM INCLUDING A GAMMA-RAY-RESPONSIVE DEVICE SUPPORTED WITHIN SAID INSTRUMENT IN THE VICINITY OF SAID WALL-ENGAGING FACE AND IN LONGITUDINALLY SPACED RELATION FROM SAID SOURCE RELATIVE TO THE AXIS OF THE BOREHOLE.
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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |