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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0655594 (1976-02-05) |
우선권정보 | DT-2505420 (1975-02-08) |
발명자 / 주소 |
|
출원인 / 주소 |
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인용정보 | 피인용 횟수 : 271 인용 특허 : 0 |
A method for starting a process to recover energy raw materials from a subterranean formation whereby igniters are injected into the upper region of the formation and inert gas is injected into the lower region of the formation, and thereafter an oxygen-containing gas is injected at a predetermined
A method for starting a process to recover energy raw materials from a subterranean formation whereby igniters are injected into the upper region of the formation and inert gas is injected into the lower region of the formation, and thereafter an oxygen-containing gas is injected at a predetermined oxygen concentration and rate to initiate combustion, followed by increasing the oxygen concentration and/or rate of the injected gas to a maximum value.
A method for starting the operation of a process for the recovery of energy raw materials from a subterranean formation penetrated by a borehole comprising the steps of: a. introducing into the upper region of said formation igniters known per se, b. simultaneously introducing into the lower region
A method for starting the operation of a process for the recovery of energy raw materials from a subterranean formation penetrated by a borehole comprising the steps of: a. introducing into the upper region of said formation igniters known per se, b. simultaneously introducing into the lower region of said formation an inert gas thereby preventing intrusion of said igniters into said lower region, c. subsequently introducing a gas with a predetermined oxygen concentration and injection rate into the lower region until ignition occurs and a combustion front is formed as indicated by a corresponding increases in temperature, d. continuing injection of said gas at said injection rate until the combustion front has been moved a predetermined distance into said formation, e. increasing said injection rate of said gas and/or oxygen concentration in said gas to a maximum rate and/or concentration respectively, f. injecting the said gas with the final oxygen concentration through at least one radially arranged outlet opening into the formation with a pressure ratio of flow-in pressure to discharge pressure at the outlet opening of 1.2 to 2.5, and g. simultaneously injecting water into the upper region of said formation.
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