Patent US3332488A successfully refreshed from Google Patents.
US3332488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In situ combustion process
Assignee: Gulf Research and Development Co
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Filing: 1964-12-30
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Granted: 1967-07-25
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Expires: 1984-12-30
Abstract
No abstract record available.
Inventors
- 👤 Lawrence A Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:15
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD OF PRODUCING AN UPGRADED OIL FROM AN UNDERGROUND OIL-BEARING FORMATION BY IN SITU COMBUSTION BETWEEN AN INPUT WELL AND AN OUPUT WELL, EACH WELL HAVING CASING INSTALLED AND CEMENTED THROUGH THE OIL-BEARING FROMATION, COMPRISING: PERFORATING THE INPUT WELL AND THE OUTPUT WELL ADJACENT ONLY THE UPPER BOUNDARY OF THE OIL-BEARING FORMATION; FORMING A CHANNEL OF INCREASED PERMEABILITY BETWEEN THE INPUT WELL AND THE OUTPUT WELL ADJACENT ONLY THE UPPER BOUNDARY OF THE OIL-BEARING FORMATION: THEREAFTER INJECTING AN OXIDIZING GAS INTO THE CHANNEL OF INCREASED PERMEABILITY AT A RATE ADJUSTED TO MAINTAIN A ZONE OF COMBUSTION ADJACENT THE UPPER BOUNDARY OF THE OIL AND TO MAINTAIN THE OXYGEN CONTENT OF THE COMBUSTION GAS, DELIVERED INTO THE OUTPUT WELL, BELOW ABOUT FIVE PERCENT DETERMINED AT THE OUTPUT WELL ON A HYDROCARBON-FREE BASIS; AND
Claim 2
Independent Claim
133 words
A METHOD OF PRODUCING AN UPGRADED OIL FROM AN UNDERGROUND OIL-BEARING FORMATION BY IN SITU COMBUSTION BETWEEN AN INPUT WELL AND AN OUPUT WELL, EACH WELL HAVING CASING INSTALLED AND CEMENTED THROUGH THE OIL-BEARING FROMATION, COMPRISING: PERFORATING THE INPUT WELL AND THE OUTPUT WELL ADJACENT ONLY THE UPPER BOUNDARY OF THE OIL-BEARING FORMATION; FORMING A CHANNEL OF INCREASED PERMEABILITY BETWEEN THE INPUT WELL AND THE OUTPUT WELL ADJACENT ONLY THE UPPER BOUNDARY OF THE OIL-BEARING FORMATION: THEREAFTER INJECTING AN OXIDIZING GAS INTO THE CHANNEL OF INCREASED PERMEABILITY AT A RATE ADJUSTED TO MAINTAIN A ZONE OF COMBUSTION ADJACENT THE UPPER BOUNDARY OF THE OIL AND TO MAINTAIN THE OXYGEN CONTENT OF THE COMBUSTION GAS, DELIVERED INTO THE OUTPUT WELL, BELOW ABOUT FIVE PERCENT DETERMINED AT THE OUTPUT WELL ON A HYDROCARBON-FREE BASIS; AND
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |