Patent US2917112A successfully refreshed from Google Patents.
US2917112A
Expired / Lapsed
US
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Inverse air injection technique
Assignee: Phillips Petroleum Co
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Filing: 1956-11-13
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Granted: 1959-12-15
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Expires: 1976-11-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Trantham
- 👤 Arthur R Schleicher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:25
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR INITIATING IN SITU COMBUSTION IN A GASPERVIOUS UNDERGROUND CARBONACEOUS FORMATION AROUND A BOREHOLE THEREIN, SAID FORMATION CONTAINING NORMALLY SOLID HYDROCARBONS, WHICH COMPRISES HEATING SAID FORMATION ADJACENT SAID BOREHOLE TO A TEMPERATUE ABOVE THE COMBUSTION TEMPERATURE OF THE CARBONACEOUS MATERIAL; MAINTAINING A NONCOMBUSTIBLE ATMOSPHERE IN SAID BOREHOLE ADJACENT SAID FORMATION DURING HEATING THEREOF SO THAT SUBSTANTIAL COMBUSTION OF SAID FORMATION HYDROCARBONS IS PREVENTED, AND WHILE AT SAID TEMPERATURE, PASSING FREEOXYGEN-CONTAINING GAS TO THE HOT CARBONACEOUS MATERIAL THRU THE FORMATION FROM AN AREA SPACED RADIALLY OUTSIDE
Claim 2
Dependent Claim
87 words
A PROCESS FOR INITIATING IN SITU COMBUSTION IN A GASPERVIOUS UNDERGROUND CARBONACEOUS FORMATION AROUND A BOREHOLE THEREIN, SAID FORMATION CONTAINING NORMALLY SOLID HYDROCARBONS, WHICH COMPRISES HEATING SAID FORMATION ADJACENT SAID BOREHOLE TO A TEMPERATUE ABOVE THE COMBUSTION TEMPERATURE OF THE CARBONACEOUS MATERIAL; MAINTAINING A NONCOMBUSTIBLE ATMOSPHERE IN SAID BOREHOLE ADJACENT SAID FORMATION DURING HEATING THEREOF SO THAT SUBSTANTIAL COMBUSTION OF SAID FORMATION HYDROCARBONS IS PREVENTED, AND WHILE AT SAID TEMPERATURE, PASSING FREEOXYGEN-CONTAINING GAS TO THE HOT CARBONACEOUS MATERIAL THRU THE FORMATION FROM AN AREA SPACED RADIALLY OUTSIDE
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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |