US3354952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil recovery by waterflooding
Assignee: Phillips Petroleum Co
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Filing: 1965-08-09
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Granted: 1967-11-28
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Expires: 1985-08-09
Abstract
No abstract record available.
Inventors
- 👤 Charles J Engle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:14
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD OF WATERFLOODING AN OIL-BEARING FROMATION TO RECOVER OIL THEREFROM COMPRISING PRODUCING WATER INTO A BOREHOLE FORM A WATER-BEARING FORMATION SITUATED BELOW SAID OIL-BEAING FORMATION; LIFTING SAID WATER WITHIN SAID BOREHOLE TO A HEIGHT BELOW GROUND SURFACE BUT WHICH IS SUFFICIENT TO PROVIDE A HYDROSTATIC HEAD OF PRESSURE GREATER THAN THE FORMATION PRESSURE OF SAID OILBEARING FROMATION; AND WATERFLOODING SAID OIL-BEARING FORMATION BY ALLOWING THE WATER TO PASS OUTWARD FROM SAID BOREHOLE DIRECTLY INTO SAID OIL-BEARING FORMATION.
Claim 2
Independent Claim
78 words
A METHOD OF WATERFLOODING AN OIL-BEARING FROMATION TO RECOVER OIL THEREFROM COMPRISING PRODUCING WATER INTO A BOREHOLE FORM A WATER-BEARING FORMATION SITUATED BELOW SAID OIL-BEAING FORMATION; LIFTING SAID WATER WITHIN SAID BOREHOLE TO A HEIGHT BELOW GROUND SURFACE BUT WHICH IS SUFFICIENT TO PROVIDE A HYDROSTATIC HEAD OF PRESSURE GREATER THAN THE FORMATION PRESSURE OF SAID OILBEARING FROMATION; AND WATERFLOODING SAID OIL-BEARING FORMATION BY ALLOWING THE WATER TO PASS OUTWARD FROM SAID BOREHOLE DIRECTLY INTO SAID OIL-BEARING 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) | 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 |