US3120122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for investigating earth formations
Assignee: Schlumberger Well Surveying Corp
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Filing: 1960-10-03
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Granted: 1964-02-04
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Expires: 1980-10-03
Abstract
No abstract record available.
Inventors
- 👤 Frank P Kokesh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:52
CPC Classifications
G; G01; G01V; G01V11/00; G01V11/002; G01V11/005; G01V9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
THE METHOD OF DETECTING PERMEABLE ZONES IN EARTH FORMATIONS TRAVERSED BY A BOREHOLE COMPRISING THE STEPS OF: SUSPENDING WITHIN THE BOREHOLE A PAD ADAPTED FOR CONTACT WITH THE BOREHOLE, PRESSING THE PAD INTO CONTACT WITH THE SIDE OF THE BOREHOLE WITH A SUBSTANTIALLY CONSTANT FORCE, SLIDING THE PAD ALONG THE SIDE OF THE BOREHOLE, AND MEASURING THE FORCE REQUIRED TO OVERCOME FRICTION OF THE PAD RELATIVE TO THE SIDE 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) | 1967-02-03 | 1967-08-05 | 1968-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-03 | 1971-08-05 | 1972-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-03 | 1975-08-05 | 1976-02-04 | $7700.00 | Window Closed / Lapsed |