US3289609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid recovery
Assignee: Signal Oil and Gas Co
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Filing: 1964-02-20
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Granted: 1966-12-06
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Expires: 1984-02-20
Abstract
No abstract record available.
Inventors
- 👤 Robert O Palo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:14
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/005; F04; F04F; F04F1/00; F04F1/18; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/0119; F17C2201/05; F17C2201/052; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0352; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2227/00; F17C2227/01; F17C2227/0114; F17C2227/0128; F17C2227/0157; F17C2250/00; F17C2250/01; F17C2260/00; F17C2260/01; F17C2260/015; F17C2270/00; F17C2270/01; F17C2270/0142; F17C2270/0144; F17C2270/0147; F17C2270/0157; F17C2270/016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
A CONTINUOUS PROCESS FOR RECOVERING READILY VAPORIZABLE LIQUID FROM AN UNDERGROUND CAVERN, WHICH PROCESS COMPRISES CARRYING OUT IN SEQUENCE AND ON A CONTINUOUS BASIS THE STEPS OF PASSING A LIFT GAS COMPRISING THHE GAS PHASE OF A READILY VAPORIZABLE LIQUID DOWN A WELL ANNULUS AND INTO CONTACT WITH A READILY VAPORIZABLE LIQUID IN AN UNDERGROUND CAVERN, SAID LIFT GAS BEING UNDER A DRIVE PRESSURE JUST SUFFICIENT TO CAUSE SAID LIFT GAS TO DEPRESS THE LIQUID LEVEL IN SAID ANNULUS TO BELOW THAT IN SAID CAVERN EXTERNAL OF SAID ANNULUS, THE LIFT GAS BEING PASSED INTO SAID CAVERN AT ABOUT THE DEW POINT OF SAID LIFT GAS BUT AT A RATE SUFFICIENTL TO SUBSTANTIALLY MAINTAIN SAID GAS IN UNCONDENSED FORM DURING SAID GAS LIFTING, ESTABLISHING AND MAINTAINING LAMINAR FLOW OF SAID LIFT GAS IN SAID ANNULUS WHEREBY A THERMALLY INSULATIVE LAYER OF SAID LIFT GAS IS FORMED AROUND A PLURALITY OF GAS LIFT ZONES TO PREVENT CONDENSATION OF SAID LIFT GAS IN SAID ANNULUS AND EVAPORATION OF SAID CAVERN LIQUID IN SAID GAS LIFT ZONES, INJECTING AT LEAST A MAJOR PROPORTION OF SAID LIFT GAS CONTAINING A MINOR PROPORTION OF SAID LIQUID THROUGH A PLURALITY OF UNRESTRICTED UPWARDLY DIRECTED
Claim 2
Dependent Claim
198 words
A CONTINUOUS PROCESS FOR RECOVERING READILY VAPORIZABLE LIQUID FROM AN UNDERGROUND CAVERN, WHICH PROCESS COMPRISES CARRYING OUT IN SEQUENCE AND ON A CONTINUOUS BASIS THE STEPS OF PASSING A LIFT GAS COMPRISING THHE GAS PHASE OF A READILY VAPORIZABLE LIQUID DOWN A WELL ANNULUS AND INTO CONTACT WITH A READILY VAPORIZABLE LIQUID IN AN UNDERGROUND CAVERN, SAID LIFT GAS BEING UNDER A DRIVE PRESSURE JUST SUFFICIENT TO CAUSE SAID LIFT GAS TO DEPRESS THE LIQUID LEVEL IN SAID ANNULUS TO BELOW THAT IN SAID CAVERN EXTERNAL OF SAID ANNULUS, THE LIFT GAS BEING PASSED INTO SAID CAVERN AT ABOUT THE DEW POINT OF SAID LIFT GAS BUT AT A RATE SUFFICIENTL TO SUBSTANTIALLY MAINTAIN SAID GAS IN UNCONDENSED FORM DURING SAID GAS LIFTING, ESTABLISHING AND MAINTAINING LAMINAR FLOW OF SAID LIFT GAS IN SAID ANNULUS WHEREBY A THERMALLY INSULATIVE LAYER OF SAID LIFT GAS IS FORMED AROUND A PLURALITY OF GAS LIFT ZONES TO PREVENT CONDENSATION OF SAID LIFT GAS IN SAID ANNULUS AND EVAPORATION OF SAID CAVERN LIQUID IN SAID GAS LIFT ZONES, INJECTING AT LEAST A MAJOR PROPORTION OF SAID LIFT GAS CONTAINING A MINOR PROPORTION OF SAID LIQUID THROUGH A PLURALITY OF UNRESTRICTED UPWARDLY DIRECTED
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |