US2729783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for electrical well logging
Assignee: Phillips Petroleum Co
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Filing: 1950-02-06
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Granted: 1956-01-03
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Expires: 1970-02-06
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Piety
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:53
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
APPARATUS FOR ELECTRICAL WELL LOGGING WHICH COMPRISES, IN COMBINATION, A CAGE FORMING A FIRST ELECTRODE ADAPTED TO CONTACT WELL FLUID WHEN THE CAGE IS LOWERED INTO A WELL BORE, SAID CAGE INCLUDING A PLURALITY OF STRIPS OF RESILIENT MATERIAL SO ARRANGED AS TO ENGAGE THE WALLS OF A WELL BORE TO RESIST MOVEMENT OF THE CAGE IN A LONGITUDINAL DIRECTION THERETHROUGH, A CABLE ATTACHED AT ITS LOWER END OF SAID CAGE FOR SUSPENDING SAID CAGE IN A WELL BORE, A WEIGHT CARRIED BY SAID CABLE AT A POSITION ABOVE ITS POINT OF ATTACHMENT TO SAID CAGE, THE PORTION OF SAID CABLE BETWEEN SAID CAGE AND SAID WEIGHT BEING SUFFICIENTLY FLEXIBLE TO ALLOW SAID WEIGHT TO ENGAGE SAID CAGE WHEREBY THE WEIGHT FORCES THE CAGE DOWNWARDLY THROUGH THE WELL BORE, SECOND AND THIRD ELECTRODES CARRIED BY SAID CABLE ABOVE SAID WEIGHT IN SPACED RELATION WITH ONE ANOTHER
Claim 2
Dependent Claim
146 words
APPARATUS FOR ELECTRICAL WELL LOGGING WHICH COMPRISES, IN COMBINATION, A CAGE FORMING A FIRST ELECTRODE ADAPTED TO CONTACT WELL FLUID WHEN THE CAGE IS LOWERED INTO A WELL BORE, SAID CAGE INCLUDING A PLURALITY OF STRIPS OF RESILIENT MATERIAL SO ARRANGED AS TO ENGAGE THE WALLS OF A WELL BORE TO RESIST MOVEMENT OF THE CAGE IN A LONGITUDINAL DIRECTION THERETHROUGH, A CABLE ATTACHED AT ITS LOWER END OF SAID CAGE FOR SUSPENDING SAID CAGE IN A WELL BORE, A WEIGHT CARRIED BY SAID CABLE AT A POSITION ABOVE ITS POINT OF ATTACHMENT TO SAID CAGE, THE PORTION OF SAID CABLE BETWEEN SAID CAGE AND SAID WEIGHT BEING SUFFICIENTLY FLEXIBLE TO ALLOW SAID WEIGHT TO ENGAGE SAID CAGE WHEREBY THE WEIGHT FORCES THE CAGE DOWNWARDLY THROUGH THE WELL BORE, SECOND AND THIRD ELECTRODES CARRIED BY SAID CABLE ABOVE SAID WEIGHT IN SPACED RELATION WITH ONE ANOTHER
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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |