Patent US2793697A successfully refreshed from Google Patents.
US2793697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reestablishing in situ combustion in petroliferous formations
Assignee: California Research LLC
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Filing: 1955-07-05
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Granted: 1957-05-28
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Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 Clarke N Simm
- 👤 Priester Coral L De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:02
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
THE METHOD OF ESTABLISHING COMBUSTION IN A SUBTERRANEAN PETROLIFEROUS DEPOSIT WHICH IS SEPARATED FROM A WELL BORE BY A ZONE SUBSTANTIALLY DEVOID OF PETROLIFEROUS MATERIAL COMPRISING THE STEPS OF HEATING THE PORTION OF SAID ZONE ADJACENT SAID WELL BORE TO A TEMPERATURE IN EXCESS OF 1000* F. TO PRODUCE A HOT FRONT, SUPPLYING A GASEOUS MIXTURE CONTAINING A COMBUSTIBLE GAS THROUGH SAID WELL BORE TO SAID HOT FRONT, ADJUSTING THE CONCENTRATION OF SAID COMBUSTIBLE GAS IN SAID MIXTURE TO VALUE OUTSIDE THE RANGE OF COMBUSTIBILITY OF SAID MIX TURE TO TRANSPORT SAID HOT FRONT INTO SAID ZONE UNTIL THE TEMPERATURE OF SAID HOT FRONT DECREASES TO A PREDETERMINED VALUE, READJUSTING THE CONCENTRATION OF SAID COMBUSTIBLE GAS IN SAID MIXTURE TO A VALUE WITHIN THE RANGE OF COMBUSTIBILITY OF SAID MIXTURE TO PRODUCE COMBUSTION FOR RELEVATING THE TEMPERATURE OF SAID HOT ZONE TO IN EXCESS OF 1000* F., AND ALTERNATELY SO VARYING THE CONCENTRATION OF SAID COMBUSTIBLE GAS IN SAID GASEOUS MIXTURE TO CAUSE SAID HOT FRONT TO PROGRESS THROUGH SAID ZONE TO SAID PETROLIFEROUS DEPOSIT.
Claim 2
Independent Claim
175 words
THE METHOD OF ESTABLISHING COMBUSTION IN A SUBTERRANEAN PETROLIFEROUS DEPOSIT WHICH IS SEPARATED FROM A WELL BORE BY A ZONE SUBSTANTIALLY DEVOID OF PETROLIFEROUS MATERIAL COMPRISING THE STEPS OF HEATING THE PORTION OF SAID ZONE ADJACENT SAID WELL BORE TO A TEMPERATURE IN EXCESS OF 1000* F. TO PRODUCE A HOT FRONT, SUPPLYING A GASEOUS MIXTURE CONTAINING A COMBUSTIBLE GAS THROUGH SAID WELL BORE TO SAID HOT FRONT, ADJUSTING THE CONCENTRATION OF SAID COMBUSTIBLE GAS IN SAID MIXTURE TO VALUE OUTSIDE THE RANGE OF COMBUSTIBILITY OF SAID MIX TURE TO TRANSPORT SAID HOT FRONT INTO SAID ZONE UNTIL THE TEMPERATURE OF SAID HOT FRONT DECREASES TO A PREDETERMINED VALUE, READJUSTING THE CONCENTRATION OF SAID COMBUSTIBLE GAS IN SAID MIXTURE TO A VALUE WITHIN THE RANGE OF COMBUSTIBILITY OF SAID MIXTURE TO PRODUCE COMBUSTION FOR RELEVATING THE TEMPERATURE OF SAID HOT ZONE TO IN EXCESS OF 1000* F., AND ALTERNATELY SO VARYING THE CONCENTRATION OF SAID COMBUSTIBLE GAS IN SAID GASEOUS MIXTURE TO CAUSE SAID HOT FRONT TO PROGRESS THROUGH SAID ZONE TO SAID PETROLIFEROUS DEPOSIT.
References Cited (Backward Citations)
US2642943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |