US3107730A
Expired / Lapsed
US
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Sample taking apparatus
Assignee: Schlumberger Well Surveying Corp
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Filing: 1959-08-10
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Granted: 1963-10-22
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Expires: 1979-08-10
Abstract
No abstract record available.
Inventors
- 👤 Maurice P Lebourg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:51
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7796
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
117 words
IN A CABLE SUPPORTED WELL TOOL APPARATUS FOR USE IN A FLUID-FILLED WELL BORE WHEREIN SUCH APPARATUS HAS AN INTERNALLY CONTAINED CONDUIT FOR FLUID FLOW ONLY IN SAID APPARATUS AND WHEREIN THE PRESSURE OF FLUIDS IN SAID CONDUIT ARE DIFFERENT FROM THE PRESSURE OF THE FLUIDS IN THE WELL BORE, THE IMPROVEMENT IN SAID APPARATUS COMPRISING VALVE MEANS FOR OPENING OR CLOSING SAID CONDUIT DEPENDEND UPON THE PRESSURE DIFFERENTIAL BETWEEN FLUIDS WITHIN THE CONDUIT AND FLUIDS IN THE WELL BORE, SAID VALVE MEANS INCLUDING A VALVE SEAT AND A VALVE MEMBER DISPOSED IN SAID CONDUIT AND COOPERATIVE UPON RELATIVE MOVEMENT THEREBETWEEN TO EITHER OPEN OR CLOSE SAID CONDUIT, SAID APPARATUS FURTHER HAVING A BORE EXTENDING BETWEEN SAID
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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |