US3196944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miscible-displacement process
Assignee: Pure Oil Co
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Filing: 1961-12-11
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Granted: 1965-07-27
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Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 George G Bernard
- 👤 Orrin C Holbrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:32
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/594
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
THE METHOD FOR RECOVERING PETROLEUM FROM UNDERGROUND RESERVOIRS PENETRATED BY AN INJECTION WELL AND A PRODUCING WELL COMPRISING INJECTING THROUGH SAID INJECTION WELL AND INTO SAID FORMATION 0.03 TO 0.20 RESERVOIR PORE VOLUME OF A LOW-MOLECULAR-WEIGHT LIQUID HYDROCARBON, AT LEAST THE LAST-INJECTED 0.03 RESERVOIR PORE VOLUME OF WHICH CONTAINS IN SOLUTION A HIGH-FOAMING, OIL-SOLUBLE SURFACTANT IN AN AMOUNT SUFFICIENT TO PRODUCE A FOAM ON CONTACT IN THE RESERVOIR WITH A HYDROCARHBON GAS, THEN INJECTING HYDROCARBON GAS, SUBSTANTIALLY FREE OF A SURFACTANT, TO FORM A FOAM BANK AT LEAST BETWEN SAID INJECTED LIQUID HYDROCARBON AND SAID HYDROCARBON GAS AND TO DRIVE SAID INJECTED LIQUID HYDROCARBON TOWARD SAID PRODUCING WELL, AND RECOVERING PETROLEUM THEREFROM.
Claim 2
Independent Claim
112 words
THE METHOD FOR RECOVERING PETROLEUM FROM UNDERGROUND RESERVOIRS PENETRATED BY AN INJECTION WELL AND A PRODUCING WELL COMPRISING INJECTING THROUGH SAID INJECTION WELL AND INTO SAID FORMATION 0.03 TO 0.20 RESERVOIR PORE VOLUME OF A LOW-MOLECULAR-WEIGHT LIQUID HYDROCARBON, AT LEAST THE LAST-INJECTED 0.03 RESERVOIR PORE VOLUME OF WHICH CONTAINS IN SOLUTION A HIGH-FOAMING, OIL-SOLUBLE SURFACTANT IN AN AMOUNT SUFFICIENT TO PRODUCE A FOAM ON CONTACT IN THE RESERVOIR WITH A HYDROCARHBON GAS, THEN INJECTING HYDROCARBON GAS, SUBSTANTIALLY FREE OF A SURFACTANT, TO FORM A FOAM BANK AT LEAST BETWEN SAID INJECTED LIQUID HYDROCARBON AND SAID HYDROCARBON GAS AND TO DRIVE SAID INJECTED LIQUID HYDROCARBON TOWARD SAID PRODUCING WELL, AND RECOVERING PETROLEUM THEREFROM.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |