US3074481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the improvement of areal sweep during secondary recovery
Assignee: Union Oil Company of California
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Filing: 1959-09-25
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Granted: 1963-01-22
•
Expires: 1979-09-25
Abstract
No abstract record available.
Inventors
- 👤 Habermann Benzion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:45
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
THE METHOD OF RECOVERING OIL FROM A SUBTERRANEAN RESERVOIR PIERCED BY AT LEAST THREE WELLS CONSISTING OF AN INPUT WELL, A SECOND WELL SPACED A SUBSTANTIAL DISTANCE THEREFROM AND A THIRD WELL LOCATED BETWEEN SAID INPUT AND SECOND WELLS WHICH COMPRISES: INJECTING A DISPLACEMENT FLUID INTO SAID INPUT WELL; WITHDRAWING SAID OIL FROM SAID RESERVOIR THROUGH SAID THIRD WELL UNTIL THE PRESENCE OF SAID DISPLACEMENT FLUID IS DETECTED IN THE EFFLUENT FROM SAID THIRD WELL; THEREAFTER, CEASING SAID WITHDRAWAL OF SAID OIL FROM SAID THIRD WELL AND INJECTING A SLUG OF VISCOUS LIQUID INTO SAID RESERVOIR THROUGH SAID THIRD WELL, SAID VISCOUS LIQUID HAVING A VISCOSITY AT RESERVOIR CONDITIONS GREATER THAN THE VISCOSITY OF THE MOST VISCOUS OF SAID FIRST DISPLACEMENT FLUID AND SAID OIL, THE VISCOSITY AND AMOUNT OF SAID VISCOUS LIQUID BEING SUFFICIENT TO SUBSTANTIALLY RETARD THE ADVANCE OF SAID DISPLACEMENT FLUID IN THE VICINITY OF SAID THIRD WELL BORE; THEREAFTER SHUTTING IN SAID THIRD WELL AND WITHDRAWING SAID OIL FROM SAID SECOND WELL WHILE CONTINUING TO INJECT SAID DISPLACEMENT FLUID INTO SAID INPUT WELL.
Claim 2
Independent Claim
177 words
THE METHOD OF RECOVERING OIL FROM A SUBTERRANEAN RESERVOIR PIERCED BY AT LEAST THREE WELLS CONSISTING OF AN INPUT WELL, A SECOND WELL SPACED A SUBSTANTIAL DISTANCE THEREFROM AND A THIRD WELL LOCATED BETWEEN SAID INPUT AND SECOND WELLS WHICH COMPRISES: INJECTING A DISPLACEMENT FLUID INTO SAID INPUT WELL; WITHDRAWING SAID OIL FROM SAID RESERVOIR THROUGH SAID THIRD WELL UNTIL THE PRESENCE OF SAID DISPLACEMENT FLUID IS DETECTED IN THE EFFLUENT FROM SAID THIRD WELL; THEREAFTER, CEASING SAID WITHDRAWAL OF SAID OIL FROM SAID THIRD WELL AND INJECTING A SLUG OF VISCOUS LIQUID INTO SAID RESERVOIR THROUGH SAID THIRD WELL, SAID VISCOUS LIQUID HAVING A VISCOSITY AT RESERVOIR CONDITIONS GREATER THAN THE VISCOSITY OF THE MOST VISCOUS OF SAID FIRST DISPLACEMENT FLUID AND SAID OIL, THE VISCOSITY AND AMOUNT OF SAID VISCOUS LIQUID BEING SUFFICIENT TO SUBSTANTIALLY RETARD THE ADVANCE OF SAID DISPLACEMENT FLUID IN THE VICINITY OF SAID THIRD WELL BORE; THEREAFTER SHUTTING IN SAID THIRD WELL AND WITHDRAWING SAID OIL FROM SAID SECOND WELL WHILE CONTINUING TO INJECT SAID DISPLACEMENT FLUID INTO SAID INPUT WELL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |