Patent US3329889A successfully refreshed from Google Patents.
US3329889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for investigating earth formations featuring simultaneous focussed coil and electrode system measurements
Assignee: Schlumberger Technology Corp
•
Filing: 1962-11-28
•
Granted: 1967-07-04
•
Expires: 1982-11-28
Abstract
No abstract record available.
Inventors
- 👤 Denis R Tanguy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:48
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A METHOD OF OBTAINING AN IMPROVED INDICATION OF THE NATURE OF SUBSURFACE EARTH FORMATIONS TRAVERSED BY A BOREHOLE COMPRISING: MEASURING THE ELECTRICAL RESISTANCE OF THE FORMATION MATERIAL AT A FIRST LATERAL DISTANCE FROM THE BOREHOLE BY MEANS OF A SHALLOW-PENETRATION ELECTRODE SYSTEM; SIMULTANEOUSLY MEASURING THE ELECTRICAL RESISTANCE OF THE FORMATION MATERIAL AT A SECOND LATERAL DISTANCE FROM THE BOREHOLE BY MEANS OF A FIRST FOCUSSED COIL SYSTEM WHICH IS PREDOMINANTLY RESPONSIVE TO FORMATION MATERIAL AT THIS SECOND LATERAL DISTANCE; SIMULTANEOUSLY MEASURING THE ELECTRICAL RESISTANCE OF THE FORMATION MATERIAL AT A THIRD LATERAL DISTANCE FROM THE BOREHOLE BY MEANS OF A SECOND FOCUSSED COIL SYSTEM WHICH IS PREDOMINANTLY RESPONSIVE TO FORMATION MATERIAL AT THIS THIRD LATERAL DISTANCE; REPEATING THESE MEASUREMENTS IN A CONTINUOUS MANNER ALONG A DESIRED LENGTH OF THE BOREHOLE; AND RECORDING THE ELECTRODE SYSTEM MEASUREMENTS, THE FIRST FOCUSSED COIL SYSTEM MEASUREMENTS AND THE SECOND FOCUSSED COIL SYSTEM MEASUREMENTS AS INDIVIDUAL TRACES ON A COMMON RECORDING MEDIUM AS A FUNCTION OF BOREHOLE DEPTH.
Claim 2
Independent Claim
163 words
A METHOD OF OBTAINING AN IMPROVED INDICATION OF THE NATURE OF SUBSURFACE EARTH FORMATIONS TRAVERSED BY A BOREHOLE COMPRISING: MEASURING THE ELECTRICAL RESISTANCE OF THE FORMATION MATERIAL AT A FIRST LATERAL DISTANCE FROM THE BOREHOLE BY MEANS OF A SHALLOW-PENETRATION ELECTRODE SYSTEM; SIMULTANEOUSLY MEASURING THE ELECTRICAL RESISTANCE OF THE FORMATION MATERIAL AT A SECOND LATERAL DISTANCE FROM THE BOREHOLE BY MEANS OF A FIRST FOCUSSED COIL SYSTEM WHICH IS PREDOMINANTLY RESPONSIVE TO FORMATION MATERIAL AT THIS SECOND LATERAL DISTANCE; SIMULTANEOUSLY MEASURING THE ELECTRICAL RESISTANCE OF THE FORMATION MATERIAL AT A THIRD LATERAL DISTANCE FROM THE BOREHOLE BY MEANS OF A SECOND FOCUSSED COIL SYSTEM WHICH IS PREDOMINANTLY RESPONSIVE TO FORMATION MATERIAL AT THIS THIRD LATERAL DISTANCE; REPEATING THESE MEASUREMENTS IN A CONTINUOUS MANNER ALONG A DESIRED LENGTH OF THE BOREHOLE; AND RECORDING THE ELECTRODE SYSTEM MEASUREMENTS, THE FIRST FOCUSSED COIL SYSTEM MEASUREMENTS AND THE SECOND FOCUSSED COIL SYSTEM MEASUREMENTS AS INDIVIDUAL TRACES ON A COMMON RECORDING MEDIUM AS A FUNCTION OF BOREHOLE DEPTH.
References Cited (Backward Citations)
US3124742A
Cited
US2582314A
Cited
US3052835A
Cited
US3079550A
Cited
US3076928A
Cited
US3086168A
Cited
US3075142A
Cited
US3181057A
Cited
US3259836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |