Patent US2722657A successfully refreshed from Google Patents.
US2722657A
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Means for detecting changes in dielectric constant of thin strata of lithological formations traversed by a borehole
Assignee: Perforating Guns Atlas Corp
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Filing: 1953-07-03
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Granted: 1955-11-01
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Expires: 1973-07-03
Abstract
No abstract record available.
Inventors
- 👤 Janssen Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:34
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A DEVICE FOR MEASURING THE CHANGES IN DIELECTRIC CONSTANT OF PREDOMINANTLY THIN LAYERS OF DIFFERENT GEOLOGIC STRATA TRAVERSED BY A BOREHOLE, WHICH COMPRISES A CONDUCTIVE HOUSING INSERTABLE INTO SAID BOREHOLE CONTAINING MEASURING MEANS FOR MEASURING CHANGES IN CAPACITY, A CONDUCTOR OF SHORT LONGITUDINAL EXTENT RELATIVE TO SAID HOUSING AND SUPPORTED FROM SAID HOUSING, SAID CONDUCTOR AND THE SURFACE OF SAID HOUSING SERVING AS THE PLATES OF A CAPACITOR, THE CAPACITY OF WHICH VARIES BY VIRTUE OF THE SURROUNDING LITHOLOGICAL STRATA, CONDUCTING MEANS INTERCONNECTING THE MEASURING MEANS IN SAID HOUSING AND SAID CONDUCTOR, A MEDIUM OF VERY LOW DIELECTRIC CONSTANT AND HAVING THE MAXIMUM THICKNESS THEREOF INSULATING SAID CONDUCTOR FROM SAID HOUSING, THEREBY DISTORTING THE HIGH FREQUENCY FIELD EMANATING FROM SAID CONDUCTOR WHEREBY ONLY THE TERRAIN IN THE VICINITY OF SAID CONDUCTOR CAUSES SUBSTANTIAL CHANGES IN CAPACITY MEASURED BY SAID MEASURING MEANS.
Claim 2
Independent Claim
141 words
A DEVICE FOR MEASURING THE CHANGES IN DIELECTRIC CONSTANT OF PREDOMINANTLY THIN LAYERS OF DIFFERENT GEOLOGIC STRATA TRAVERSED BY A BOREHOLE, WHICH COMPRISES A CONDUCTIVE HOUSING INSERTABLE INTO SAID BOREHOLE CONTAINING MEASURING MEANS FOR MEASURING CHANGES IN CAPACITY, A CONDUCTOR OF SHORT LONGITUDINAL EXTENT RELATIVE TO SAID HOUSING AND SUPPORTED FROM SAID HOUSING, SAID CONDUCTOR AND THE SURFACE OF SAID HOUSING SERVING AS THE PLATES OF A CAPACITOR, THE CAPACITY OF WHICH VARIES BY VIRTUE OF THE SURROUNDING LITHOLOGICAL STRATA, CONDUCTING MEANS INTERCONNECTING THE MEASURING MEANS IN SAID HOUSING AND SAID CONDUCTOR, A MEDIUM OF VERY LOW DIELECTRIC CONSTANT AND HAVING THE MAXIMUM THICKNESS THEREOF INSULATING SAID CONDUCTOR FROM SAID HOUSING, THEREBY DISTORTING THE HIGH FREQUENCY FIELD EMANATING FROM SAID CONDUCTOR WHEREBY ONLY THE TERRAIN IN THE VICINITY OF SAID CONDUCTOR CAUSES SUBSTANTIAL CHANGES IN CAPACITY MEASURED BY SAID MEASURING MEANS.
References Cited (Backward Citations)
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US2246460A
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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) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |