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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0396620 (1995-03-01) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 369 인용 특허 : 5 |
A.C. electrical heating system for heating a fluid reservoir (deposit) in the vicinity of a mineral fluid well, usually an oil well, utilizes A.C. electrical power in a range of 25 Hz to 30 KHz. The well has a borehole extending down through an overburden and into a subterranean fluid (oil) reservoi
A.C. electrical heating system for heating a fluid reservoir (deposit) in the vicinity of a mineral fluid well, usually an oil well, utilizes A.C. electrical power in a range of 25 Hz to 30 KHz. The well has a borehole extending down through an overburden and into a subterranean fluid (oil) reservoir. There is a well casing including an upper electrically conductive casing around the borehole in the overburden, and at least one electrically conductive heating electrode located in the reservoir to deliver heat to the reservoir. An electrically insulating casing is interposed between the upper casing and the heating electrode. An electrically isolated conductor extends down through the casing. The heating system further includes an electrical A.C. power source having first and second outputs; the power source is usually located at the top of the well. There is a downhole voltage-reducing impedance transformation network having a primary and a secondary; in one described construction this network includes a step-down transformer. The primary of the transformation network is connected to the outputs of the power source. The secondary of the transformation network is connected to the downhole heating electrode.
An A.C. electrical heating system for heating a fluid reservoir in the vicinity of a mineral fluid well, utilizing A.C. electrical power in a range of 25 Hz to 30 KHz, the well comprising a borehole extending down through an overburden and into a subterranean fluid reservoir, the well having a casin
An A.C. electrical heating system for heating a fluid reservoir in the vicinity of a mineral fluid well, utilizing A.C. electrical power in a range of 25 Hz to 30 KHz, the well comprising a borehole extending down through an overburden and into a subterranean fluid reservoir, the well having a casing including an upper electrically conductive casing around the borehole in the overburden, at least one electrically conductive heating electrode located in the reservoir and an electrically insulating casing interposed between the upper casing and the heating electrode, and an electrically isolated conductor extending down through the casing, the heating system comprising: an electrical A.C. power source having first and second outputs; a downhole voltage-reducing impedance transformation network having a primary and a secondary; primary connection means connecting the primary of the transformation network to the first and second outputs of the power source; and secondary connection means connecting the secondary of the transformation network to the heating electrode.
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