US3172425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well control system
Assignee: ExxonMobil Oil Corp
•
Filing: 1962-03-22
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Granted: 1965-03-09
•
Expires: 1982-03-22
Abstract
No abstract record available.
Inventors
- 👤 John B Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:56
CPC Classifications
E; E21; E21B; E21B43/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86445; Y10T137/86453; Y10T137/877; Y10T137/87708; Y10T137/87772; Y10T137/87788
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A WELL CONTROL SYSTEM COMPRISING CONDITION-CONTROL ELEMENTS FOR CONTROLLING THE FLOW OF FLUID FROM A WELL, MEANS FOR SELECTIVELY APPLYING POWER TO SAID CONDITIONCONTROL ELEMENTS COMPRISING A CIRCUIT INCLUDING TWO RELAYS EACH HAVING A CONTROL WINDING, ENERGIZING CIRCUITS FOR SAID CONTROL WINDINGS, MEANS FOR MOMENTARILY APPLYING A CONTROL SIGNAL FOR SELECTIVELY ENERGIZING THE CONTROL WINDINGS OF ONE OF SAID RELAYS TO CLOSE A POWER CIRCUIT FOR APPLYING POWER TO ONE OF THE ELEMENTS, MEANS FOR OPENING THE ENERGIZING CIRCUIT FOR ONE RELAY UPON THE ENERGIZATION OF THE SELECTED RELAY, MEANS FOR HOLDING THE SELECTED RELAY IN THE CONDITION-ENERGIZED STATE UPON WITHDRAWAL OF SAID CONTROL SIGNAL, AND MEANS FOR APPLYING A SIGNAL TO SAID HOLDING MEANS TO RELEASE THE SELECTED RELAY FOR RETURN TO ITS DE-ENERGIZED STATE PRIOR TO SELECTED ENERGIZATION OF EITHER OF SAID RELAYS.
Claim 2
Dependent Claim
135 words
A WELL CONTROL SYSTEM COMPRISING CONDITION-CONTROL ELEMENTS FOR CONTROLLING THE FLOW OF FLUID FROM A WELL, MEANS FOR SELECTIVELY APPLYING POWER TO SAID CONDITIONCONTROL ELEMENTS COMPRISING A CIRCUIT INCLUDING TWO RELAYS EACH HAVING A CONTROL WINDING, ENERGIZING CIRCUITS FOR SAID CONTROL WINDINGS, MEANS FOR MOMENTARILY APPLYING A CONTROL SIGNAL FOR SELECTIVELY ENERGIZING THE CONTROL WINDINGS OF ONE OF SAID RELAYS TO CLOSE A POWER CIRCUIT FOR APPLYING POWER TO ONE OF THE ELEMENTS, MEANS FOR OPENING THE ENERGIZING CIRCUIT FOR ONE RELAY UPON THE ENERGIZATION OF THE SELECTED RELAY, MEANS FOR HOLDING THE SELECTED RELAY IN THE CONDITION-ENERGIZED STATE UPON WITHDRAWAL OF SAID CONTROL SIGNAL, AND MEANS FOR APPLYING A SIGNAL TO SAID HOLDING MEANS TO RELEASE THE SELECTED RELAY FOR RETURN TO ITS DE-ENERGIZED STATE PRIOR TO SELECTED ENERGIZATION OF EITHER OF SAID RELAYS.
References Cited (Backward Citations)
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Cited
US2716206A
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US2858483A
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US2931954A
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US3051433A
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US3036229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |