US3209825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature in-situ combustion
Assignee: ConocoPhillips Co
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Filing: 1962-02-14
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Granted: 1965-10-05
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Expires: 1982-02-14
Abstract
No abstract record available.
Inventors
- 👤 John D Alexander
- 👤 John N Dew
- 👤 William L Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:30
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
153 words
A METHOD OF RECOVERING OIL FROM A SUBSURFACE FORMATION CONTAINING OIL AND WATER AND TRAVERSED BY AN INJECTION WELL AND AT LEAST ONE RECOVERY WELL, COMPRISING THE STEPS OF: (A) FORCING AIR THROUGH THE FORMATION FROM THE INJECTION WELL TO THE RECOVERY WELL; (B) SLOWLY OVER A PERIOD OF DAYS, INCREASING THE TEMPERATURE OF SAID AIR WITHIN THE INJECTION WELL AND WHILE THE RESULTING HEATED AIR IS BEING INJECTED INTO THE FORMATION FROM THE INJECTION WELL TO A TEMPERATURE LESS THAN THE COKING TEMPERATURE OF THE OIL IN THE FORMATION, BUT SUFFICIENTLY HIGH TO OXISIZE RESIDUAL OIL IN THE FORMATION AROUND THE INJECTION WELL TO FORM A FLAME FRONT IN THE FORMATION; (C) CONTINUING THE INJECTION OF AIR INTO THE FORMATION THROUGH THE INJECTION WELL FOR MOVING THE FLAME FRONT FORMED BY SAID OXIDATION TOWARD THE RECOVERY WELL, AND (D) RECOVERING THE GASES AND LIQUIDS FLOWING INTO THE RECOVERY WELL FROM THE FORMATION.
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |