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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0170577 (1993-12-20) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 297 인용 특허 : 0 |
A method for heat injection into a subterranean diatomite formation is provided. The method utilizes a heater that is placed directly in the diatomite formation without cement around the heater. Diatomite is very soft, and will quickly fill in around the heater, operation of the heater will sinter t
A method for heat injection into a subterranean diatomite formation is provided. The method utilizes a heater that is placed directly in the diatomite formation without cement around the heater. Diatomite is very soft, and will quickly fill in around the heater, operation of the heater will sinter the diatomite and significantly increase the original thermal conductivity and strength of the diatomite.
A method for heating a subterranean diatomite formation, the method comprising: drilling a wellbore into the diatomite formation; inserting a heater into the wellbore; permitting the diatomite to close up around the heater without cementing at least a major portion of the heater into the formation;
A method for heating a subterranean diatomite formation, the method comprising: drilling a wellbore into the diatomite formation; inserting a heater into the wellbore; permitting the diatomite to close up around the heater without cementing at least a major portion of the heater into the formation; and firing the heater and thereby sintering the diatomite in the vicinity of the heater. An apparatus for injecting heat into a subterranean diatomite formation, the apparatus comprising: a combustion air conduit through which combustion air can be conducted from the surface to a mixing point, the combustion air conduit placed without cement directly in the diatomite formation; a return conduit through which gas can be conducted from the mixing point to the surface, the return conduit placed without cement directly in the diatomite formation; a fuel gas conduit through which fuel gas may be conducted from the surface to a mixing point within the formation to be heated, the fuel gas conduit being located within the combustion air conduit, the return conduit, or both; a means to conduct heat from the return conduit to the combustion air conduit, the fuel gas conduit or both; a heater surface capable of conducting heat from the return conduit to the formation; and an electrical heater in the return conduit, the electrical heater comprising a heated surface and the electrical heater being capable of providing a heated surface temperature above the autoignition temperature of a fuel gas and combustion air mixture.
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