Patent US3295601A successfully refreshed from Google Patents.
US3295601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transition zone formation in oil production
Assignee: Phillips Petroleum Co
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Filing: 1964-03-20
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Granted: 1967-01-03
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Expires: 1984-03-20
Abstract
No abstract record available.
Inventors
- 👤 Santourian Melcon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:46
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/164; Y; Y02; Y02P; Y02P90/00; Y02P90/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A METHOD OF ESTABLISHING A TRANSITION ZONE DOWNHOLE AROUND AN INJECTION WELL FOR USE IN A MISCIBLE FLUID DRIVE PROCESS IN RECOVERING OIL FROM AN OIL-BEARING STRATUM PRIOR TO INJECTION OF A DRIVING FLUID AND FORCING SAME THRU SAID STRATUM FROM SAID INJECTION WELL TO AT LEAST ONE OFFSET PRODUCTION WELL, WHICH METHOD COMPRISES THE STEPS OF: (1) INJECTING INTO SAID STRATUM THRU SAID INJECTION WELL, A FLUID MISCIBLE WITH THE OIL IN SAID STRATUM AND CONTAINING A SUBSTANTIAL CONCENTRATION OF CO2; (2) CONTINUING THE INJECTION OF SAID FLUID INTO SAID STRATUM UNTIL THE WELL PRESSURE REACHES AT LEAST 500 P.S.I.G.; (3) THEREAFTER, RELEASING THE FLUID PRESSURE IN SAID WELL SO THAT FLUID PRESSURE BUILT UP IN SAID STRATUM AND SOLUTION GAS DRIVE CAUSES FLUID FLOW INTO SAID INJEC-
Claim 2
Independent Claim
129 words
A METHOD OF ESTABLISHING A TRANSITION ZONE DOWNHOLE AROUND AN INJECTION WELL FOR USE IN A MISCIBLE FLUID DRIVE PROCESS IN RECOVERING OIL FROM AN OIL-BEARING STRATUM PRIOR TO INJECTION OF A DRIVING FLUID AND FORCING SAME THRU SAID STRATUM FROM SAID INJECTION WELL TO AT LEAST ONE OFFSET PRODUCTION WELL, WHICH METHOD COMPRISES THE STEPS OF: (1) INJECTING INTO SAID STRATUM THRU SAID INJECTION WELL, A FLUID MISCIBLE WITH THE OIL IN SAID STRATUM AND CONTAINING A SUBSTANTIAL CONCENTRATION OF CO2; (2) CONTINUING THE INJECTION OF SAID FLUID INTO SAID STRATUM UNTIL THE WELL PRESSURE REACHES AT LEAST 500 P.S.I.G.; (3) THEREAFTER, RELEASING THE FLUID PRESSURE IN SAID WELL SO THAT FLUID PRESSURE BUILT UP IN SAID STRATUM AND SOLUTION GAS DRIVE CAUSES FLUID FLOW INTO SAID INJEC-
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |