US3166708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of investigating earth formations by determining the amounts of different types of fluids that may be present in the formations
Assignee: Schlumberger Well Surveying Corp
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Filing: 1962-05-07
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Granted: 1965-01-19
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Expires: 1982-05-07
Abstract
No abstract record available.
Inventors
- 👤 Marcus L Millican
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:08
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20; G01V11/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A METHOD OF INVESTIGATING A SUBSURFACE EARTH FORMATION TRANSVERSED BY A BOREHOLE CONTAINING A DRILL FLUID COMPRISING: OBTAINING MEASUREMENTS OF THE ELECTRICAL RESISTIVITY OF FIRST AND SECOND PORTIONS OF THE FORMATION, THE FIRST PORTION BEING IMMEDIATELY ADJACENT THE BOREHOLE AND THE SECOND PORTION BEING AT A GREATER DISTANCE FROM THE BOREHOLE; CONVERTING EACH OF THE FIRST AND SECOND RESISTIVITY MEASUREMENTS INTO A MEASUREMENT PROPORTIONAL TO
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) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |