Patent US2742967A successfully refreshed from Google Patents.
US2742967A
Expired / Lapsed
US
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Oil well process
Assignee: Union Oil Company of California
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Filing: 1951-11-13
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Granted: 1956-04-24
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Expires: 1971-11-13
Abstract
No abstract record available.
Inventors
- 👤 Clayton A Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:51
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/2401
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
THE METHOD OF PRODUCING OIL FROM AN OIL WELL WHICH COMPRISES ASCERTAINING THE THICKNESS OF THE OIL-BEARING FORMATION; POSITIONING AN ELECTRIC HEATER IN THE WELL BORE AT A DEPTH BELOW THAT OF THE MID-POINT OF SAID FORMATION, WHEREBY ONLY ABOUT THE LOWERMOST 50% OF SAID FORMATION IS SUBJECTED TO SUBSTANTIAL HEATING AND THE UPPERMOST 50% OF SAID FORMATION REMAINS AT SUBSTANTIALLY THE NORMAL FORMATION TEMPERATURE; SUPPLYING ELECTRICAL ENERGY TO SAID HEATER; AND PUMPING OIL FROM THE WELL AT SUCH RATE THAT THE LEVEL OF THE OIL POOL AT THE BOTTOM OF THE WELL IS BELOW A SUBSTANTIAL PORTION OF THE HEATER, WHEREBY A SUBSTANTIAL PORTION OF THE HEAT WHICH IS TRANSFERRED FROM THE HEATED TO THE OIL-BEARING FORMATION IS TRANSFERRED THROUGH THE INTERVENING GASEOUS PHASE OCCUPYING THE SPACE ABOVE SAID OIL POOL.
Claim 2
Independent Claim
132 words
THE METHOD OF PRODUCING OIL FROM AN OIL WELL WHICH COMPRISES ASCERTAINING THE THICKNESS OF THE OIL-BEARING FORMATION; POSITIONING AN ELECTRIC HEATER IN THE WELL BORE AT A DEPTH BELOW THAT OF THE MID-POINT OF SAID FORMATION, WHEREBY ONLY ABOUT THE LOWERMOST 50% OF SAID FORMATION IS SUBJECTED TO SUBSTANTIAL HEATING AND THE UPPERMOST 50% OF SAID FORMATION REMAINS AT SUBSTANTIALLY THE NORMAL FORMATION TEMPERATURE; SUPPLYING ELECTRICAL ENERGY TO SAID HEATER; AND PUMPING OIL FROM THE WELL AT SUCH RATE THAT THE LEVEL OF THE OIL POOL AT THE BOTTOM OF THE WELL IS BELOW A SUBSTANTIAL PORTION OF THE HEATER, WHEREBY A SUBSTANTIAL PORTION OF THE HEAT WHICH IS TRANSFERRED FROM THE HEATED TO THE OIL-BEARING FORMATION IS TRANSFERRED THROUGH THE INTERVENING GASEOUS PHASE OCCUPYING THE SPACE ABOVE SAID OIL POOL.
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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) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |