US3223081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bottom-hole catalytic heater using heat transfer liquid
Assignee: Pan American Petroleum Corp
•
Filing: 1963-05-24
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Granted: 1965-12-14
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Expires: 1983-05-24
Abstract
No abstract record available.
Inventors
- 👤 Elton B Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:15
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/02; F; F24; F24V; F24V30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A BOTTOM-HOLE HEATER FOR OIL WELLS HAVING IN COMBINATION AN ELONGATED CYLINDRICAL ENCLOSED VESSEL, A CATALYST CHAMBER THEREIN, A FLUID-TIGHT JACKET ABOUT SAID VESSEL DEFINING AN ENCLOSED SPACE BETWEEN SAID JACKET AND SAID VESSEL, AND A CONDUIT EXTENDING INTO SAID CHAMBER TO FORM AN ANNULAR SPACE IN SAID CHAMBER AND AN ANNULAR OPENING AT THE TOP THEREOF, A FUEL OXIDATION CATALYST IN SAID CHAMBER, AND HEAT TRANSFER MATERIAL IN SAID ENCLOSED SPACE TO REMOVE HEAT FROM SAID CHAMBER VIA SAID JACKET.
Claim 2
Dependent Claim
81 words
A BOTTOM-HOLE HEATER FOR OIL WELLS HAVING IN COMBINATION AN ELONGATED CYLINDRICAL ENCLOSED VESSEL, A CATALYST CHAMBER THEREIN, A FLUID-TIGHT JACKET ABOUT SAID VESSEL DEFINING AN ENCLOSED SPACE BETWEEN SAID JACKET AND SAID VESSEL, AND A CONDUIT EXTENDING INTO SAID CHAMBER TO FORM AN ANNULAR SPACE IN SAID CHAMBER AND AN ANNULAR OPENING AT THE TOP THEREOF, A FUEL OXIDATION CATALYST IN SAID CHAMBER, AND HEAT TRANSFER MATERIAL IN SAID ENCLOSED SPACE TO REMOVE HEAT FROM SAID CHAMBER VIA SAID JACKET.
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |