US3209824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering oil from underground reservoir
Assignee: Atlantic Richfield Co
•
Filing: 1963-01-21
•
Granted: 1965-10-05
•
Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard A Koch
- 👤 Loyd R Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:00
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD OF RECOVERING OIL SUBSTANTIALLY FREE OF NITROGEN FROM A NONDEPLETED OIL RESERVOIR HAVING A COMMUNICATION THEREWITH AT LEAST ONE INJECTION WELL AND AT LEAST ONE PRODUCTION WELL AT LEAST 100 FEET APART; COMPRISING, INJECTING INTO SAID RESERVOIR THROUGH SAID INJECTION WELL IN DIRECT CONTACT WITH THE LIQUID OIL IN SAID RESERVOIR AND DISPLACING SAID OIL, THROUGH AT LEST 100 FEET OF TRAVEL PATH IN SAID RESERVOIR, BY DIRECT CONTACT WITH A GAS CONTAINING AT LEAST 80% BY VOLUME OF NITROGEN AT A PREDETERMINED PRESSURE BELOW THAT PRESSURE WHICH WILL FRACTURE THE FORMATION OF SAID RESERVOIR BUT ABOVE THE LOWERST PRESSURE AT WHICH SAID GAS IS MISCIBLE WITH SAID OIL; AND, SIMULTANEOUSLY WITH SAID INJECTION AND DISPLACEMENT, WITHDRAWING THROUGH SAID PRODUCTION WELL FLUIDS DISPLACED FROM SAID RESERVOIR BY SAID INJECTION GAS.
Claim 2
Independent Claim
132 words
A METHOD OF RECOVERING OIL SUBSTANTIALLY FREE OF NITROGEN FROM A NONDEPLETED OIL RESERVOIR HAVING A COMMUNICATION THEREWITH AT LEAST ONE INJECTION WELL AND AT LEAST ONE PRODUCTION WELL AT LEAST 100 FEET APART; COMPRISING, INJECTING INTO SAID RESERVOIR THROUGH SAID INJECTION WELL IN DIRECT CONTACT WITH THE LIQUID OIL IN SAID RESERVOIR AND DISPLACING SAID OIL, THROUGH AT LEST 100 FEET OF TRAVEL PATH IN SAID RESERVOIR, BY DIRECT CONTACT WITH A GAS CONTAINING AT LEAST 80% BY VOLUME OF NITROGEN AT A PREDETERMINED PRESSURE BELOW THAT PRESSURE WHICH WILL FRACTURE THE FORMATION OF SAID RESERVOIR BUT ABOVE THE LOWERST PRESSURE AT WHICH SAID GAS IS MISCIBLE WITH SAID OIL; AND, SIMULTANEOUSLY WITH SAID INJECTION AND DISPLACEMENT, WITHDRAWING THROUGH SAID PRODUCTION WELL FLUIDS DISPLACED FROM SAID RESERVOIR BY SAID INJECTION GAS.
References Cited (Backward Citations)
US2609051A
Cited
US2623596A
Cited
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 |