Patent US2825408A successfully refreshed from Google Patents.
US2825408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil recovery by subsurface thermal processing
Assignee: SOGC Inc
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Filing: 1953-03-09
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Granted: 1958-03-04
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Expires: 1973-03-09
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:18
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR THE RECOVERY OF OIL FROM A SUBSURFACE FORMATION OF UNCONSOLIDATED OIL-CONTAINING SANDS WHICH COMPRISES PROVIDING AN INPUT BORE TO THE SAID SUBSURFACE SANDS, INSERTING AN INPUT PIPE IN THE SAID BORE TO EXTEND TO THE SAID SUBSURFACE SANDS, INJECTING HOT INERT GASES THROUGH THE SAID INPUT PIPE INTO THE SAID SUBSURFACE SANDS TO RAISE THE TEMPERATURE THEREOF TO A HYDROCARBON VAPORIZING AND CRACKING TEMPERATURE OF ABOUT 700 TO 1200* F. THEREBY ESTABLISHING A ZONE OF ERODED AND HEATED CIRCULATING SANDS, VAPORS AND GASES WITHIN SAID SUBSURFACE SANDS PROVIDING AN EXIT FOR SAID RELEASE VAPORSS AND GASES TO THE EARTH''S SURFACE ENLARGINGTE SAID ERODED AND HEATED ZONE BY TE PROGRESSIVE VERTICAL MOVEMENT OF THE SAID INPUT PIPE WITHIN THE SUBSURFACE SANDS AND THEREAFTER RECOVERING OIL PRODUCED BY THE PROCESS FROM THE RELEASED AND WITHDRAWN VAPORS AND GASES.
Claim 2
Dependent Claim
139 words
A PROCESS FOR THE RECOVERY OF OIL FROM A SUBSURFACE FORMATION OF UNCONSOLIDATED OIL-CONTAINING SANDS WHICH COMPRISES PROVIDING AN INPUT BORE TO THE SAID SUBSURFACE SANDS, INSERTING AN INPUT PIPE IN THE SAID BORE TO EXTEND TO THE SAID SUBSURFACE SANDS, INJECTING HOT INERT GASES THROUGH THE SAID INPUT PIPE INTO THE SAID SUBSURFACE SANDS TO RAISE THE TEMPERATURE THEREOF TO A HYDROCARBON VAPORIZING AND CRACKING TEMPERATURE OF ABOUT 700 TO 1200* F. THEREBY ESTABLISHING A ZONE OF ERODED AND HEATED CIRCULATING SANDS, VAPORS AND GASES WITHIN SAID SUBSURFACE SANDS PROVIDING AN EXIT FOR SAID RELEASE VAPORSS AND GASES TO THE EARTH''S SURFACE ENLARGINGTE SAID ERODED AND HEATED ZONE BY TE PROGRESSIVE VERTICAL MOVEMENT OF THE SAID INPUT PIPE WITHIN THE SUBSURFACE SANDS AND THEREAFTER RECOVERING OIL PRODUCED BY THE PROCESS FROM THE RELEASED AND WITHDRAWN VAPORS AND GASES.
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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |