Patent US4622147A successfully refreshed from Google Patents.
Patent US3137344A successfully refreshed from Google Patents.
US3137344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Minimizing loss of driving fluids in secondary recovery
Assignee: Phillips Petroleum Co
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Filing: 1960-05-23
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Granted: 1964-06-16
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Expires: 1980-05-23
Abstract
No abstract record available.
Inventors
- 👤 Robert F Wiemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:02
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/34; E21B43/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
A METHOD OF RECOVERING OIL FROM AN OIL-BEARING FORMATION HAVING A PLURALITY OF WELLS ARRANGED IN SUBSTANTIALLY REGULAR SPACED ROWS PENETRATING SAID FORMATION WHEREIN WATER IS INJECTED INTO THE RESERVOIR VIA A FIRST INPUT WELL, SAID INPUT WELL BEING DISPOSED CENTRALLY RELATIVE TO A FIRST GROUP OF PRODUCTION WELLS, CONTINUING THE INJECTION OF WATER UNTIL THE RATIO OF WATER TO OIL PRODUCED IS UNECONOMICAL AND THERE REMAINS UNSWEPT SECTIONS OF THE RESERVOIR THAT EXTEND BETWEEN THE PRODUCING WELLS OF SAID FIRST GROUP, THEREAFTER SHUTTING DOWN SAID WATER INPUT WELL, INJECTING A BANK OF A LIQUEFIABLE PETROLEUM GAS INTO AT LEAST ONE WELL OF SAID FIRST GROUP OF PRODUCING WELLS, MAINTAINING A PRESSURE ON SAID INJECTED PETROLEUM GAS SUFFICIENT TO RETAIN THE GAS IN LIQUEFIED FORM, NEXT INJECTING A NONCONDENSING GAS THROUGH SAID ONE WELL OF SAID FIRST GROUP SO AS TO DRIVE SAID LIQUEFIED PETROLEUM GAS THROUGH SAID FORMATION TOWARD THE REMAINING PRODUCING WELLS OF SAID FIRST GROUP, WITHDRAWING OIL, LIQUEFIED PETROLEUM GAS AND NON-CONDENSING GAS FROM SAID RESERVOIR THROUGH SAID REMAINING PRODUCING WELLS, SEPARATING THE PRODUCED FLUIDS, REINJECTING THE SEPARATED LIQUEFIED PETROLEUM GAS INTO AT LEAST ONE WELL OF A SECOND GROUP OF WELLS, THEREAFTER RE-
Claim 2
Independent Claim
197 words
A METHOD OF RECOVERING OIL FROM AN OIL-BEARING FORMATION HAVING A PLURALITY OF WELLS ARRANGED IN SUBSTANTIALLY REGULAR SPACED ROWS PENETRATING SAID FORMATION WHEREIN WATER IS INJECTED INTO THE RESERVOIR VIA A FIRST INPUT WELL, SAID INPUT WELL BEING DISPOSED CENTRALLY RELATIVE TO A FIRST GROUP OF PRODUCTION WELLS, CONTINUING THE INJECTION OF WATER UNTIL THE RATIO OF WATER TO OIL PRODUCED IS UNECONOMICAL AND THERE REMAINS UNSWEPT SECTIONS OF THE RESERVOIR THAT EXTEND BETWEEN THE PRODUCING WELLS OF SAID FIRST GROUP, THEREAFTER SHUTTING DOWN SAID WATER INPUT WELL, INJECTING A BANK OF A LIQUEFIABLE PETROLEUM GAS INTO AT LEAST ONE WELL OF SAID FIRST GROUP OF PRODUCING WELLS, MAINTAINING A PRESSURE ON SAID INJECTED PETROLEUM GAS SUFFICIENT TO RETAIN THE GAS IN LIQUEFIED FORM, NEXT INJECTING A NONCONDENSING GAS THROUGH SAID ONE WELL OF SAID FIRST GROUP SO AS TO DRIVE SAID LIQUEFIED PETROLEUM GAS THROUGH SAID FORMATION TOWARD THE REMAINING PRODUCING WELLS OF SAID FIRST GROUP, WITHDRAWING OIL, LIQUEFIED PETROLEUM GAS AND NON-CONDENSING GAS FROM SAID RESERVOIR THROUGH SAID REMAINING PRODUCING WELLS, SEPARATING THE PRODUCED FLUIDS, REINJECTING THE SEPARATED LIQUEFIED PETROLEUM GAS INTO AT LEAST ONE WELL OF A SECOND GROUP OF WELLS, THEREAFTER RE-
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |