US3223166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlled catalytic heating of a subsurface formation
Assignee: Pan American Petroleum Corp
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Filing: 1963-05-27
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Granted: 1965-12-14
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Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Elton B Hunt
- 👤 Grekel Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:56
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A METHOD FOR HEATING A SUBSURFACE FORMATION CONTAINING A COMBUSTIBLE MATERIAL, SAID FORMATION BEING PENETRATED BY A WELL WHEREIN A BODY OF AN OXIDATION CATALYST IS PLACED IN SAID WELL AND AT THE APPROPRIATE LEVEL OF SAID FORMATION, AND CONDUCTING A NONEXPLOSIVE, FUEL-OXYGEN CONTAINING GAS MIXTURE THROUGH SAID CATALYST TO PRODUCE HOT PRODUCTS OF COMBUSTION WHICH PASS IN HEAT EXCHANGE RELATION WITH SAID FORMATION, THE IMPROVEMENT WHICH COMPRISES CONTROLLING THE TEMPERATURE OF SAID PRODUCTS BY BYPASSING A REGULATED PORTION OF SAID FUEL-OXYGEN CONTAINING GAS MIXTURE AROUND SAID CATALYST, THE VOLUME OF SAID MIXTURE BYPASSED AROUND SAID CATALYST VARYING DIRECTLY WITH THE TEMPERATURE OF SAID PRODUCTS, AND THEREAFTER COMBINING SAID PORTION WITH SAID PRODUCTS.
Claim 2
Independent Claim
113 words
A METHOD FOR HEATING A SUBSURFACE FORMATION CONTAINING A COMBUSTIBLE MATERIAL, SAID FORMATION BEING PENETRATED BY A WELL WHEREIN A BODY OF AN OXIDATION CATALYST IS PLACED IN SAID WELL AND AT THE APPROPRIATE LEVEL OF SAID FORMATION, AND CONDUCTING A NONEXPLOSIVE, FUEL-OXYGEN CONTAINING GAS MIXTURE THROUGH SAID CATALYST TO PRODUCE HOT PRODUCTS OF COMBUSTION WHICH PASS IN HEAT EXCHANGE RELATION WITH SAID FORMATION, THE IMPROVEMENT WHICH COMPRISES CONTROLLING THE TEMPERATURE OF SAID PRODUCTS BY BYPASSING A REGULATED PORTION OF SAID FUEL-OXYGEN CONTAINING GAS MIXTURE AROUND SAID CATALYST, THE VOLUME OF SAID MIXTURE BYPASSED AROUND SAID CATALYST VARYING DIRECTLY WITH THE TEMPERATURE OF SAID PRODUCTS, AND THEREAFTER COMBINING SAID PORTION WITH SAID PRODUCTS.
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) | 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 |