Patent US3868957A successfully refreshed from Google Patents.
US3249124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Borehole apparatus valves
Assignee: Schlumberger Well Surveying Corp
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Filing: 1963-06-14
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Granted: 1966-05-03
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Expires: 1983-06-14
Abstract
No abstract record available.
Inventors
- 👤 William O Berryman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:05
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/12; E21B21/00; E21B21/10; E21B2200/00; E21B2200/05; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/86936; Y10T137/86992; Y10T137/87016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A FULL-OPENING VALVE FOR USE IN A WELL BORE COMPRISING: TELESCOPICALLY-MOUNTED, INNER AND OUTER TUBULAR MANDREL ASSMBLIES RELATIVELY MOVABLE BETWEEN EXTENDED AND COLLAPSED POSITIONS; FLAP VALVE MEANS IN SAID OUTER MANDREL ASSEMBLY NORMALLY CLOSED WHEN SAID ASSEMBLIES ARE IN AN EXTENDED POSITION; MEANS ON SAID INNER MANDREL ASSEMBLY FOR OPENING SAID FLAP VALVE MEANS WHEN SAID ASSEMBLIES ARE IN A COLLAPSED POSITION; AND BYPASS MEANS AROUND SAID FLAP VALVE MEANS INCLUDING A FLUD PASSAGEWAY IN SAID OUTER MANDREL BETWEEN THE INTERIOR OF SAID INNER AND OUTER MANDREL ASSEMBLIES, AND VALVE MEANS BETWEEN SAID ASSEMBLIES FOR OPENING AND CLOSING SAID FLUID PASSAGEWAY, SAID VALVE MEANS BEING RESPONSIVE TO THE POSTIIONING OF SAID MANDREL ASSEMBLIES IN AN EXTENDED POSITION TO CLOSE SAID FLUID PASSAGEWAY AND RESPONSIVE TO THE POSITIONING OF SAID MANDREL ASEMBLIES IN AN INTERMEDIATE POSITION OF SAID SAID VALVE MEANS THEREBY PERMITTING PRESSURE BALANCING BETWEEN THE INTERIOR OF SAID INNER AND OUTER MANDREL ASSEMBLIES TO EITHER SIDE OF SAID FLAP VALVE MEANS BEFORE SAID FLAP VALVE MEANS IS OPENED.
Claim 2
Dependent Claim
169 words
A FULL-OPENING VALVE FOR USE IN A WELL BORE COMPRISING: TELESCOPICALLY-MOUNTED, INNER AND OUTER TUBULAR MANDREL ASSMBLIES RELATIVELY MOVABLE BETWEEN EXTENDED AND COLLAPSED POSITIONS; FLAP VALVE MEANS IN SAID OUTER MANDREL ASSEMBLY NORMALLY CLOSED WHEN SAID ASSEMBLIES ARE IN AN EXTENDED POSITION; MEANS ON SAID INNER MANDREL ASSEMBLY FOR OPENING SAID FLAP VALVE MEANS WHEN SAID ASSEMBLIES ARE IN A COLLAPSED POSITION; AND BYPASS MEANS AROUND SAID FLAP VALVE MEANS INCLUDING A FLUD PASSAGEWAY IN SAID OUTER MANDREL BETWEEN THE INTERIOR OF SAID INNER AND OUTER MANDREL ASSEMBLIES, AND VALVE MEANS BETWEEN SAID ASSEMBLIES FOR OPENING AND CLOSING SAID FLUID PASSAGEWAY, SAID VALVE MEANS BEING RESPONSIVE TO THE POSTIIONING OF SAID MANDREL ASSEMBLIES IN AN EXTENDED POSITION TO CLOSE SAID FLUID PASSAGEWAY AND RESPONSIVE TO THE POSITIONING OF SAID MANDREL ASEMBLIES IN AN INTERMEDIATE POSITION OF SAID SAID VALVE MEANS THEREBY PERMITTING PRESSURE BALANCING BETWEEN THE INTERIOR OF SAID INNER AND OUTER MANDREL ASSEMBLIES TO EITHER SIDE OF SAID FLAP VALVE MEANS BEFORE SAID FLAP VALVE MEANS IS OPENED.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |