US3493850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for investigating formations surrounding a borehole including means for generating opposite polarity current flow on opposite sides of the borehole
Assignee: Schlumberger Technology Corp
•
Filing: 1964-01-20
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Granted: 1970-02-03
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Nick A Schuster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:26
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN APPARATUS FOR INVESTIGATION EARTH FORMATIONS TRAVERSED BY A BOREHOLE, THE COMBINATION COMPRISING: A SUPPORT MEMBER ADAPTED FOR MOVEMENT THROUGH A BOREHOLE AND INCLUDING MEANS FOR PRODUCING OPPOSITE POLARITY MAGNETIC FLUX ON OPPOSITE SIDES OF THE LONGITUDINAL AXIS OF THE BOREHOLE, SAID MAGNETIC FLUX SETTING UP A CURRENT FLOW ON SAID OPPOSITE SIDES OF THE BOREHOLE; AND MEANS RESPONSIVE TO AT LEAST A PORTION OF SAID CURRENT FLOW FOR PROVIDING AN INDICATION OF ELECTRICAL CURRENT FLOW IN A LATERAL DIRECTION IN OR ADJACENT THE BOREHOLE.
Claim 2
Dependent Claim
85 words
IN APPARATUS FOR INVESTIGATION EARTH FORMATIONS TRAVERSED BY A BOREHOLE, THE COMBINATION COMPRISING: A SUPPORT MEMBER ADAPTED FOR MOVEMENT THROUGH A BOREHOLE AND INCLUDING MEANS FOR PRODUCING OPPOSITE POLARITY MAGNETIC FLUX ON OPPOSITE SIDES OF THE LONGITUDINAL AXIS OF THE BOREHOLE, SAID MAGNETIC FLUX SETTING UP A CURRENT FLOW ON SAID OPPOSITE SIDES OF THE BOREHOLE; AND MEANS RESPONSIVE TO AT LEAST A PORTION OF SAID CURRENT FLOW FOR PROVIDING AN INDICATION OF ELECTRICAL CURRENT FLOW IN A LATERAL DIRECTION IN OR ADJACENT THE BOREHOLE.
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Cited
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Cited
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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) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |