US3354953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of oil from reservoirs
Assignee: Pan American Petroleum Corp
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Filing: 1952-06-14
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Granted: 1967-11-28
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Expires: 1972-06-14
Abstract
No abstract record available.
Inventors
- 👤 Richard A Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:30
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
174 words
A METHOD OF RECOVERING OIL FORM A SUBTERRANEAN OIL RESERVOIR COMPRISING THE STEPS OF INJECTING INTO SAID RESERVOIR A QUANTITY OF A LIQUID MISCIBLE WITH SAID OIL, SAID QUANTITY OF MISCIBLE LIQUID BEING SUFFICIENT TO FORM A FIRST TRANSITION ZONE WITH SAID OIL AND THEN TO PROVIDE A BAND OF SUBSTANTIALLY PURE MISCIBLE LIQUID IN SAID RESERVOIR AT ALL TIMES BEHIND SAID FIRST TRRANSITION ZONE AS SAID OIL IS DRIVEN THROUGH THE PORES OF SAID RESERVOIR, INJECTING INTO SAID RESERVOIR BEHIND SAID MISCIBLE LIQUID A QUANTITY OF A SCAVENGING FLUID WHICH IS SUBSTANTIALLY MORE SOLUBLE IN SAID LIQUID THAN IN SAID OIL TO DISPLACE SAID BAND OF MISCIBLE LIQUID THROUGH SAID RESERVOIR AND PROVIDE A ZONE OF SUBSTANTIALLY PURE SCAVENGING FLUID BEHIND A SECOND TRANSITION ZONE BETWEEN SAID MISCIBLE LIQUID AND SAID SCAVENGING FLUID, AND WITHDRAWING A MIXTURE OF SAID MISCIBLE LIQUID AND SAID SCAVENGING FLUID FROM SAID SECOND TRANSITION ZONE PRODUCING A WELL LOCATED IN SAID RESERVOIR WITHIN SAID SECOND TRASITION ZONE, WHEREBY THE LENGTH OF SAID SECOND TRANSITION ZONE IS SUBSTANTIALLY REDUCED.
Claim 2
Independent Claim
174 words
A METHOD OF RECOVERING OIL FORM A SUBTERRANEAN OIL RESERVOIR COMPRISING THE STEPS OF INJECTING INTO SAID RESERVOIR A QUANTITY OF A LIQUID MISCIBLE WITH SAID OIL, SAID QUANTITY OF MISCIBLE LIQUID BEING SUFFICIENT TO FORM A FIRST TRANSITION ZONE WITH SAID OIL AND THEN TO PROVIDE A BAND OF SUBSTANTIALLY PURE MISCIBLE LIQUID IN SAID RESERVOIR AT ALL TIMES BEHIND SAID FIRST TRRANSITION ZONE AS SAID OIL IS DRIVEN THROUGH THE PORES OF SAID RESERVOIR, INJECTING INTO SAID RESERVOIR BEHIND SAID MISCIBLE LIQUID A QUANTITY OF A SCAVENGING FLUID WHICH IS SUBSTANTIALLY MORE SOLUBLE IN SAID LIQUID THAN IN SAID OIL TO DISPLACE SAID BAND OF MISCIBLE LIQUID THROUGH SAID RESERVOIR AND PROVIDE A ZONE OF SUBSTANTIALLY PURE SCAVENGING FLUID BEHIND A SECOND TRANSITION ZONE BETWEEN SAID MISCIBLE LIQUID AND SAID SCAVENGING FLUID, AND WITHDRAWING A MIXTURE OF SAID MISCIBLE LIQUID AND SAID SCAVENGING FLUID FROM SAID SECOND TRANSITION ZONE PRODUCING A WELL LOCATED IN SAID RESERVOIR WITHIN SAID SECOND TRASITION ZONE, WHEREBY THE LENGTH OF SAID SECOND TRANSITION ZONE IS SUBSTANTIALLY REDUCED.
Claim 3
Independent Claim
72 words
A METHOD OF RECOVERING OIL FROM A SUBTERRANENA OIL RESERVOIR WITH WATER COMPRISING THE STEPS OF: INJECTING A LIQUID SOLVENT INTO SAID RESERVOIR THROUGH AN INJECTION WELL SAID SOLVENT BEING CHARACTERIZED BY BEING COMPLETELY SOLUBLE IN SAID CRUDE OIL AND IN WATER IN ALL PROPORTIONS, AND BEING INJECTED IN SUFFICIENT AMOUNT TO PRODUCE WITHIN SAID RESERVOIR IN THE NEIGHBORHOOD OF SAID INJECTION WELL A BANK OF SAID CRUDE OIL, A TWO PHASE
Claim 4
Independent Claim
72 words
A METHOD OF RECOVERING OIL FROM A SUBTERRANENA OIL RESERVOIR WITH WATER COMPRISING THE STEPS OF: INJECTING A LIQUID SOLVENT INTO SAID RESERVOIR THROUGH AN INJECTION WELL SAID SOLVENT BEING CHARACTERIZED BY BEING COMPLETELY SOLUBLE IN SAID CRUDE OIL AND IN WATER IN ALL PROPORTIONS, AND BEING INJECTED IN SUFFICIENT AMOUNT TO PRODUCE WITHIN SAID RESERVOIR IN THE NEIGHBORHOOD OF SAID INJECTION WELL A BANK OF SAID CRUDE OIL, A TWO PHASE
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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) | 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 |