US2901043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heavy oil recovery
Assignee: Pan American Petroleum Corp
•
Filing: 1955-07-29
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Granted: 1959-08-25
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Expires: 1975-07-29
Abstract
No abstract record available.
Inventors
- 👤 Frank E Campion
- 👤 Eugene D Glass
- 👤 Richard A Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:25
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
IN A METHOD OF RECOVERING A HIGH VISCOSITY OIL FROM AN UNDERGROUND PRODUCING FORMATION IN WHICH IT OCCURS WHEREIN HEAT IS GENERATED BY COMBUSTION WITHIN SAID PRODUCING FORMATION, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF DRILLING AT LEAST TWO SPACED WELLS INTO SAID FORMATION, ONE OF SAIDD WELLS BEING AN INPUT WELL AND THE OTHER OF SAID WELLS BEING AN OUTPUT WELL; INITIALLY PROVIDING AT LEAST ONE GENERALLY HORIZONTAL FRACTURE EXTENDING CONFINUOUSLY THROUGH SAID FORMATION BETWEEN SAID WELLS, SAID FRACTURE HAVING A GAS FLOW CAPACITY WHICH IS LARGE COMPARED TO THE GAS FLOW CAPACITY OF SAID FORMATION WITHOUT SAID FRACTURE; THEREAFTER INITIATING COMBUSTION AT THE DEPTH OF SAID FORMATION WITHIN THE BORE OF SAID OUTPUT WELL; INJECTING A COOL COMBUSTION-SUPPORTING GAS THROUGH SAID INPUT WELL TO FLOW PRIMARILY THROUGH SAID FRACTURE TO SUPPORT SAID COMBUSTION AND TO PROPAGATE A ZONE OF COMBUSTION CHIEFLY ALONG SAID FRACTURE BACK TOWARD SAID INPUT WELL; CONTROLLING THE COMPOSITION AND INJECTION RATE OF SAID COMBUSTION-SUPPORTING GAS SO THAT THE EQUIVALENT OF AT LEAST ABOUT 0.4 CUBIC FOOT OF A STOICHIOMETRIC MIXTURE OF
Claim 2
Dependent Claim
177 words
IN A METHOD OF RECOVERING A HIGH VISCOSITY OIL FROM AN UNDERGROUND PRODUCING FORMATION IN WHICH IT OCCURS WHEREIN HEAT IS GENERATED BY COMBUSTION WITHIN SAID PRODUCING FORMATION, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF DRILLING AT LEAST TWO SPACED WELLS INTO SAID FORMATION, ONE OF SAIDD WELLS BEING AN INPUT WELL AND THE OTHER OF SAID WELLS BEING AN OUTPUT WELL; INITIALLY PROVIDING AT LEAST ONE GENERALLY HORIZONTAL FRACTURE EXTENDING CONFINUOUSLY THROUGH SAID FORMATION BETWEEN SAID WELLS, SAID FRACTURE HAVING A GAS FLOW CAPACITY WHICH IS LARGE COMPARED TO THE GAS FLOW CAPACITY OF SAID FORMATION WITHOUT SAID FRACTURE; THEREAFTER INITIATING COMBUSTION AT THE DEPTH OF SAID FORMATION WITHIN THE BORE OF SAID OUTPUT WELL; INJECTING A COOL COMBUSTION-SUPPORTING GAS THROUGH SAID INPUT WELL TO FLOW PRIMARILY THROUGH SAID FRACTURE TO SUPPORT SAID COMBUSTION AND TO PROPAGATE A ZONE OF COMBUSTION CHIEFLY ALONG SAID FRACTURE BACK TOWARD SAID INPUT WELL; CONTROLLING THE COMPOSITION AND INJECTION RATE OF SAID COMBUSTION-SUPPORTING GAS SO THAT THE EQUIVALENT OF AT LEAST ABOUT 0.4 CUBIC FOOT OF A STOICHIOMETRIC MIXTURE OF
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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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |