US3316962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In situ combustion method for residualoil recovery from petroleum deposits
Assignee: Wintershall Dea International AG
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Filing: 1966-03-15
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Granted: 1967-05-02
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Expires: 1986-03-15
Abstract
No abstract record available.
Inventors
- 👤 Lange Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:49
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/30; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
A METHOD FOR THE RECOVERY OF RESIDUAL OIL FROM UNDERGROUND PETROLEUM DEPOSITS BY FLOODING AND IN INSTU COMBUSTION COMPRISING THE FOLLOWING STEPS: (A) LOCATING IN A PETROLEUM DEPOSIT AT LEAST ONE ROW OF FLOODING BOREHOLES CONNECTING A STRUCTURALLY DEEP ZONE OF SAID DEPOSIT, AT LEAST ONE ROW OF RECOVERY BOREHOLES CONNECTING A STRUCTURALLY HIGH ZONE OF SAID DEPOSIT, AND AT LEAST ONE ROW OF TREATING BOREHOLES AND LEADING BOREHOLES, SAID TREATING AND LEADING BOREHOLES POSITIONED BETWEEN SAID FLOODING AND RECOVERING BOREHOLES AND CONNECTING AN INTERMEDIATE ZONE OF SAID DEPOSIT; (B) INTRODUCTING UNDER PRESSURE INTO SAID TREATING BOREHOLES A LIMITED AMOUNT OF ACTIVATED COMBUSTION GAS HAVING AN INCREASED OXYGEN CONTENT FOR ACHIEVING MODERATE COMBUSTION TEMPERATURES AND IGNITING SAID ACTIVATED COMBUSTION GAS IN SAID DEPOSIT BETWEEN SAID TREATING BOREHOLES AND SAID LEADING BORE HOLES WHEREBY THERE IS PRODUCED IN THE REACTION ZONE A BURNING ZONE IN WHICH IN SITU COMBUSTION IS PERFORMED IN THE STRATUM CONTENTS WHICH HAVE BEEN EXTENSIVELY CHANGED BY THE HOT VAPORS AND GASES; (C) INTRODUCING FLOOD WATER INTO SAID DEPOSIT UNDER PRESSURE WHEREBY A PRIMARY DIRECTION OF FLOW OF THE STRATUM CONTENTS IS ESTABLISHED IN SAID DEPOSIT BETWEEN SAID FLOODING BOREHOLES AND SAID RECOVERY BOREHOLES WHEREBY THE AXIS OF THE REACTION FRONT BETWEEN THE TREATING BOREHOLES AND THE LEADING BOREHOLES IS SHIFTED IN PARALLELISM IN THE DIRECTION TOWARD
Claim 2
Independent Claim
220 words
A METHOD FOR THE RECOVERY OF RESIDUAL OIL FROM UNDERGROUND PETROLEUM DEPOSITS BY FLOODING AND IN INSTU COMBUSTION COMPRISING THE FOLLOWING STEPS: (A) LOCATING IN A PETROLEUM DEPOSIT AT LEAST ONE ROW OF FLOODING BOREHOLES CONNECTING A STRUCTURALLY DEEP ZONE OF SAID DEPOSIT, AT LEAST ONE ROW OF RECOVERY BOREHOLES CONNECTING A STRUCTURALLY HIGH ZONE OF SAID DEPOSIT, AND AT LEAST ONE ROW OF TREATING BOREHOLES AND LEADING BOREHOLES, SAID TREATING AND LEADING BOREHOLES POSITIONED BETWEEN SAID FLOODING AND RECOVERING BOREHOLES AND CONNECTING AN INTERMEDIATE ZONE OF SAID DEPOSIT; (B) INTRODUCTING UNDER PRESSURE INTO SAID TREATING BOREHOLES A LIMITED AMOUNT OF ACTIVATED COMBUSTION GAS HAVING AN INCREASED OXYGEN CONTENT FOR ACHIEVING MODERATE COMBUSTION TEMPERATURES AND IGNITING SAID ACTIVATED COMBUSTION GAS IN SAID DEPOSIT BETWEEN SAID TREATING BOREHOLES AND SAID LEADING BORE HOLES WHEREBY THERE IS PRODUCED IN THE REACTION ZONE A BURNING ZONE IN WHICH IN SITU COMBUSTION IS PERFORMED IN THE STRATUM CONTENTS WHICH HAVE BEEN EXTENSIVELY CHANGED BY THE HOT VAPORS AND GASES; (C) INTRODUCING FLOOD WATER INTO SAID DEPOSIT UNDER PRESSURE WHEREBY A PRIMARY DIRECTION OF FLOW OF THE STRATUM CONTENTS IS ESTABLISHED IN SAID DEPOSIT BETWEEN SAID FLOODING BOREHOLES AND SAID RECOVERY BOREHOLES WHEREBY THE AXIS OF THE REACTION FRONT BETWEEN THE TREATING BOREHOLES AND THE LEADING BOREHOLES IS SHIFTED IN PARALLELISM IN THE DIRECTION TOWARD
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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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |