Patent US3233671A successfully refreshed from Google Patents.
US3233671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of heavy crude oils by in situ combustion
Assignee: Sinclair Research Inc
•
Filing: 1962-12-18
•
Granted: 1966-02-08
•
Expires: 1982-12-18
Abstract
No abstract record available.
Inventors
- 👤 Chatenever Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:05
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN THE RECOVERY OF OIL FROM AN OIL-BEARING UNDERGROUND FORMATION CONTAINING PETROLEUM CRUDE OIL HAVING AN API GRAVITY IN THE RANGE OF 8 TO 25, WHEREIN COMBUSTION IS ESTABLISHED WITHIN THE FORMATION, AND AN OXYGENCONTAINING PROPAGATING GAS IS INJECTED INTO THE FORMATION FROM AN INPUT WELL TO PROPGATE SAID COMBUSTION TOWARD AN OUTPUT WELL, THE STEP WHICH COMPRISES INJECTING IN THE FORMATION PRIOR TO THE INITIATION OF SAID COMBUSTION AND IN CONTACT WITH SAID PETROLEUM CRUDE OIL WHICH IT DISPLACES, A FUEL-DEPOSITING RESIDUAL MINERAL OIL OF 30 TO 40* API GRAVITY IN AN AMOUNT EQUAL TO ABOUT 7 TO 30 PERCENT OF THE PORE VOLUME OCCUPIED BY THE PETROLEUM OIL IN THE AREA TO BE SWEPT BY THE COMBUSITION TO MAINTAIN A MISCIBLE BANK BETWEEN SAID CRUDE OIL AND THE COMBUSTION ZONE AND DEPOSIT FUEL FOR SAID COMBUSTION TO SUPPORT THE HEAT WAVE AND MOVE THE HEAT WAVE THROUGH THE FORMATION.
Claim 2
Dependent Claim
151 words
IN THE RECOVERY OF OIL FROM AN OIL-BEARING UNDERGROUND FORMATION CONTAINING PETROLEUM CRUDE OIL HAVING AN API GRAVITY IN THE RANGE OF 8 TO 25, WHEREIN COMBUSTION IS ESTABLISHED WITHIN THE FORMATION, AND AN OXYGENCONTAINING PROPAGATING GAS IS INJECTED INTO THE FORMATION FROM AN INPUT WELL TO PROPGATE SAID COMBUSTION TOWARD AN OUTPUT WELL, THE STEP WHICH COMPRISES INJECTING IN THE FORMATION PRIOR TO THE INITIATION OF SAID COMBUSTION AND IN CONTACT WITH SAID PETROLEUM CRUDE OIL WHICH IT DISPLACES, A FUEL-DEPOSITING RESIDUAL MINERAL OIL OF 30 TO 40* API GRAVITY IN AN AMOUNT EQUAL TO ABOUT 7 TO 30 PERCENT OF THE PORE VOLUME OCCUPIED BY THE PETROLEUM OIL IN THE AREA TO BE SWEPT BY THE COMBUSITION TO MAINTAIN A MISCIBLE BANK BETWEEN SAID CRUDE OIL AND THE COMBUSTION ZONE AND DEPOSIT FUEL FOR SAID COMBUSTION TO SUPPORT THE HEAT WAVE AND MOVE THE HEAT WAVE THROUGH 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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |