US2910587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging process
Assignee: Pure Oil Co
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Filing: 1956-12-27
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Granted: 1959-10-27
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Expires: 1976-12-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Allyn T Sayre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:11
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR MEASURING THE INVASION AND DEPTH OF PENETRATION OF MUD FILTRATE IN GEOLOGICAL CORE SAMPLES OBTAINED BY CORING SUBTERRANEAN GEOLIGICAL STRATA EMPLOYING A DRILLING FLUID, WHICH COMPRISES INCORPORATING A FLUID-SOLUBLE, RADIOACTIVE TRACER MATERIAL IN THE DRILLING FLUID IN AN AMOUNT SUFFICIENT TO IMPART RADIOACTIVITY TO SAID FLUID USED IN SAID CORING, COLLECTING A TUBULAR CORE SAMPLE WITH RESPECT TO THE LONGITUDINAL AXIS OF SAID CORESAMPLE WITH RESPECT TO THE LONGITUDINAL AXIS OF SAID CORETO PROVIDE A SUBSTANTIALLY MUD-FREE,FLAT SURFACE, AND DESCANNING SAID SURFACE WITH A SUITABLE RADIOACTIVITY COUNTER.
Claim 2
Dependent Claim
90 words
A PROCESS FOR MEASURING THE INVASION AND DEPTH OF PENETRATION OF MUD FILTRATE IN GEOLOGICAL CORE SAMPLES OBTAINED BY CORING SUBTERRANEAN GEOLIGICAL STRATA EMPLOYING A DRILLING FLUID, WHICH COMPRISES INCORPORATING A FLUID-SOLUBLE, RADIOACTIVE TRACER MATERIAL IN THE DRILLING FLUID IN AN AMOUNT SUFFICIENT TO IMPART RADIOACTIVITY TO SAID FLUID USED IN SAID CORING, COLLECTING A TUBULAR CORE SAMPLE WITH RESPECT TO THE LONGITUDINAL AXIS OF SAID CORESAMPLE WITH RESPECT TO THE LONGITUDINAL AXIS OF SAID CORETO PROVIDE A SUBSTANTIALLY MUD-FREE,FLAT SURFACE, AND DESCANNING SAID SURFACE WITH A SUITABLE RADIOACTIVITY COUNTER.
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) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |