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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||175/92 ; 175/104 ; 175/107 ; 166/665|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 35 인용 특허 : 0|
A deep-borehole drilling device comprising a drive unit such as a downhole motor and a driven unit such as a generator in which a drive transmission coupling is provided in the form of a contact-free magnetic coupling. The magnetic coupling may be a permanent magnet coupling with the magnets arranged coaxially and is preferably a can-tube coupling comprising an outer magnet carrier and a can-tube disposed coaxially within said outer magnet carrier.
In a deep-borehole drilling device including a casing, at least one driven unit and a drive unit supported inside said casing to drive said at least one driven unit, and wherein mud flows through said casing to drive said driven unit, the improvement comprising: a drive transmission coupling for effecting a driving relation between said at least one driven unit and said drive unit, said drive transmission being a contact-free magnetic coupling supported within said casing and including first magnetic means rotatingly driven by said drive unit and second ...