Patent US3277831A successfully refreshed from Google Patents.
US3277831A
Expired / Lapsed
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Fluid dynamic pumping system and apparatus
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1964-11-16
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Granted: 1966-10-11
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Expires: 1984-11-16
Abstract
No abstract record available.
Inventors
- 👤 David V Chenoweth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:38
CPC Classifications
F; F04; F04B; F04B47/00; F04F; F04F7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A WELL PUMPING SYSTEM COMPRISING: A STRING OF PRODUCTION PIPE ADAPTED TO BE DISPOSED IN A WELL BORE HAVING A RESERVOIR OF WELL FLUID, NORMALLY CLOSED VALVE MEANS FOR ADMITTING RESERVOIR FLUID INTO SAID PRODUCTION PIPE WHEN THE PRESSURE IN SAID PIPE IS REDUCED BELOW THE PRESSURE OF SAID RESERVOIR FLUID, MEANS FOR PRESSURIZING THE FLUID IN SAID PRODUCTION PIPE, AND UNLOADER MEANS RESPONSIVE TO THE PRESSURE OF FLUID IN SAID PRODUCTION PIPE FOR ABRUPTLY RELIEVING THE PRESSURE IN SAID PRODUCTION PIPE.
Claim 2
Dependent Claim
82 words
A WELL PUMPING SYSTEM COMPRISING: A STRING OF PRODUCTION PIPE ADAPTED TO BE DISPOSED IN A WELL BORE HAVING A RESERVOIR OF WELL FLUID, NORMALLY CLOSED VALVE MEANS FOR ADMITTING RESERVOIR FLUID INTO SAID PRODUCTION PIPE WHEN THE PRESSURE IN SAID PIPE IS REDUCED BELOW THE PRESSURE OF SAID RESERVOIR FLUID, MEANS FOR PRESSURIZING THE FLUID IN SAID PRODUCTION PIPE, AND UNLOADER MEANS RESPONSIVE TO THE PRESSURE OF FLUID IN SAID PRODUCTION PIPE FOR ABRUPTLY RELIEVING THE PRESSURE IN SAID PRODUCTION PIPE.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |