US3354958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil recovery using steam
Assignee: Phillips Petroleum Co
•
Filing: 1965-10-14
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Granted: 1967-11-28
•
Expires: 1985-10-14
Abstract
No abstract record available.
Inventors
- 👤 Harry W Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:12
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR PRODUCING OIL FROM A PERMEABLE OIL STRATUM PENETRATED BY A WELL WHICH COMPRISES THE STEPS OF: (1) INJECTING STEAM INTO SAID STRATUM THRU SAID WELL FOR A SUBSTANTIAL PERIOD TO HEAT SAID STRATUM AND BUILD UP PRESSURE THEREIN; (2) TERMINATING THE INJECTION OF STEAM AND INJECTING INTO SAID STRATUM A LIQUID MORE VOLATILE THAN WATER WHICH IS VOLATILE AT DOWNHOLE TEMPERATURE; (3) MAINTAINING SAID WELL CLOSED IN FOR A SUBSTANTIAL SOAKING PERIOD SO AS TO VAPORIZE AT LEAST A SUBSTANTIAL PORTION OF THE LIQUID INJECTED IN STEP 2 AND DRIVE HEAT DEPPER INTO SAID STRATUM FROM SAID WELL; AND (4) THEREAFTER, OPENING SAID WELL TO FLOW AND PRODUCING OIL THEREFROM.
Claim 2
Dependent Claim
113 words
A PROCESS FOR PRODUCING OIL FROM A PERMEABLE OIL STRATUM PENETRATED BY A WELL WHICH COMPRISES THE STEPS OF: (1) INJECTING STEAM INTO SAID STRATUM THRU SAID WELL FOR A SUBSTANTIAL PERIOD TO HEAT SAID STRATUM AND BUILD UP PRESSURE THEREIN; (2) TERMINATING THE INJECTION OF STEAM AND INJECTING INTO SAID STRATUM A LIQUID MORE VOLATILE THAN WATER WHICH IS VOLATILE AT DOWNHOLE TEMPERATURE; (3) MAINTAINING SAID WELL CLOSED IN FOR A SUBSTANTIAL SOAKING PERIOD SO AS TO VAPORIZE AT LEAST A SUBSTANTIAL PORTION OF THE LIQUID INJECTED IN STEP 2 AND DRIVE HEAT DEPPER INTO SAID STRATUM FROM SAID WELL; AND (4) THEREAFTER, OPENING SAID WELL TO FLOW AND PRODUCING OIL THEREFROM.
References Cited (Backward Citations)
US3126961A
Cited
GB511768A
Cited
US2862558A
Cited
US3042114A
Cited
US3131759A
Cited
US3064728A
Cited
US3266569A
Cited
US3259186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |