US2769913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Displacement fluid in secondary petroleum recovery
Assignee: Texaco Inc
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Filing: 1952-12-23
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Granted: 1956-11-06
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Expires: 1972-12-23
Abstract
No abstract record available.
Inventors
- 👤 Roy P Mazzagatti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:05
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B47/11; E21B47/111
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN THE SECONDARY RECOVERY OF PETROLEUM FROM A SUBSURFACE, OIL BEARING FORMATION BY INJECTING A SECONDARY OIL DISPLACING, RECOVERY FLUID INTO SAID FORMATION AT A PLURALITY OF INJECTION POINTS TO PROMOTE FLOW OF SAID OIL TOWARD AT LEAST ONE PRODUCING WELL, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE RECOVERY FLUID AT AT LEAST ONE INJECTION POINT A DETECTABLE AMOUNT OF THE BETA-ACTIVE, ISOTOPIC ELEMENT C14 ADDING TO THE RECOVERY FLUID SUPPLIED AT OTHER OF SAID INJECTION POINTS TRITIUM IN A DETECTABLE AMOUNT, TESTING THE FLUIDS WITHDRAWN FROM SAID PRODUCING WELL BY MEANS OF A PROPORTIONAL RADIOACTIVITY COUNTER EFFECTIVE TO DISCRIMINATE BETWEEN THE ELECTRON ENERGY OF TRITIUM AND C14 AS AN INDICATION OF THE ARRIVAL OF THE RECOVERY FLUID IN THE PRODUCTION WELL, EFFECTIVE TO ESTABLISH THE ORIGIN OF THE RECOVERY FLUID ARRIVING AT THE PRODUCTION WELL.
Claim 2
Dependent Claim
136 words
IN THE SECONDARY RECOVERY OF PETROLEUM FROM A SUBSURFACE, OIL BEARING FORMATION BY INJECTING A SECONDARY OIL DISPLACING, RECOVERY FLUID INTO SAID FORMATION AT A PLURALITY OF INJECTION POINTS TO PROMOTE FLOW OF SAID OIL TOWARD AT LEAST ONE PRODUCING WELL, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE RECOVERY FLUID AT AT LEAST ONE INJECTION POINT A DETECTABLE AMOUNT OF THE BETA-ACTIVE, ISOTOPIC ELEMENT C14 ADDING TO THE RECOVERY FLUID SUPPLIED AT OTHER OF SAID INJECTION POINTS TRITIUM IN A DETECTABLE AMOUNT, TESTING THE FLUIDS WITHDRAWN FROM SAID PRODUCING WELL BY MEANS OF A PROPORTIONAL RADIOACTIVITY COUNTER EFFECTIVE TO DISCRIMINATE BETWEEN THE ELECTRON ENERGY OF TRITIUM AND C14 AS AN INDICATION OF THE ARRIVAL OF THE RECOVERY FLUID IN THE PRODUCTION WELL, EFFECTIVE TO ESTABLISH THE ORIGIN OF THE RECOVERY FLUID ARRIVING AT THE PRODUCTION WELL.
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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |