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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0930507 (1992-11-04) |
우선권정보 | GB-0007147 (1990-03-30) |
국제출원번호 | PCT/GB91/00464 (1991-03-27) |
§371/§102 date | 19921104 (19921104) |
국제공개번호 | WO-9115654 (1991-10-17) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 286 인용 특허 : 0 |
Material is thermally extracted from an underground formation with the aid of heat supplied by electrical resistance heaters (21) or by tubing (5, 6) serving as such, or by heated fluid conveyed downhole in pipes (12), which may serve as electrical conductors, or as resistance heaters, or which may
Material is thermally extracted from an underground formation with the aid of heat supplied by electrical resistance heaters (21) or by tubing (5, 6) serving as such, or by heated fluid conveyed downhole in pipes (12), which may serve as electrical conductors, or as resistance heaters, or which may be heated downhole. The fluid may be circulated upwardly after passage through a downhole pump unit where the fluid is suitable.
An apparatus for thermal extraction of material from an underground formation comprising: a surface installation, production tubing extending downhole from said surface installation for guiding said material thereto from said underground formation, passage means receiving a heated fluid and extendin
An apparatus for thermal extraction of material from an underground formation comprising: a surface installation, production tubing extending downhole from said surface installation for guiding said material thereto from said underground formation, passage means receiving a heated fluid and extending along at least a portion of said production tubing and a heat source for heating said fluid, said heat source being located to extend along at least a portion of said production tubing.
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