US3225827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underground combustion control
Assignee: Shell USA Inc
•
Filing: 1965-04-29
•
Granted: 1965-12-28
•
Expires: 1985-04-29
Abstract
No abstract record available.
Inventors
- 👤 Prats Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:55
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD OF RECOVERING HYDROCARBON FROM A HYDROCARBON OIL-BEARING FORMATION WHICH IS PENETRATED BY SUBSTANTIALLY SPACED OUTPUT AND INPUT MEANS COMPRISING: (A) INITIATING THE COMBUSTION FRONT IN THE PORTION OF THE FORMATION IMMEDIATELY SURROUNDING THE OUTPUT MEANS; (B) MAINTAINING THE COMBUSTION FRONT BY INTRODUCING A COMBUSTION SUPPORTING FLUID THROUGH THE INPUT MEANS; (C) CONTROLLING THE RATE OF OXIDATING HEATING BY SAID COMBUSTION SUPPORTING FLUID THAT IS INTRODUCED THROUGH SAID INPUT MEANS TO PREVENT SPONTANEOUS IGNITION OF THE INFORMATION UPSTREAM FROM SAID COMBUSTION FRONT BY SELECTIVELY VARYING THE REGION OF THE HYDROCARBON OIL-BEARING FORMATION INTO WHICH SAID COMBUSTION SUPPORTING FLUID IS INTRODUCED THROUGH SAID INPUT MEANS; AND (D) REMOVING HYDROCARBONS FROM THE FORMATION THROUGH SAID OUTPUT MEANS.
Claim 2
Independent Claim
116 words
A METHOD OF RECOVERING HYDROCARBON FROM A HYDROCARBON OIL-BEARING FORMATION WHICH IS PENETRATED BY SUBSTANTIALLY SPACED OUTPUT AND INPUT MEANS COMPRISING: (A) INITIATING THE COMBUSTION FRONT IN THE PORTION OF THE FORMATION IMMEDIATELY SURROUNDING THE OUTPUT MEANS; (B) MAINTAINING THE COMBUSTION FRONT BY INTRODUCING A COMBUSTION SUPPORTING FLUID THROUGH THE INPUT MEANS; (C) CONTROLLING THE RATE OF OXIDATING HEATING BY SAID COMBUSTION SUPPORTING FLUID THAT IS INTRODUCED THROUGH SAID INPUT MEANS TO PREVENT SPONTANEOUS IGNITION OF THE INFORMATION UPSTREAM FROM SAID COMBUSTION FRONT BY SELECTIVELY VARYING THE REGION OF THE HYDROCARBON OIL-BEARING FORMATION INTO WHICH SAID COMBUSTION SUPPORTING FLUID IS INTRODUCED THROUGH SAID INPUT MEANS; AND (D) REMOVING HYDROCARBONS FROM THE FORMATION THROUGH SAID OUTPUT MEANS.
References Cited (Backward Citations)
US3135324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |