发明名称 DRILLING TOOL
摘要 A drilling tool that has a flexible shaft so as to be able to make short radius curves while still being able to transmit torque and axial loads. The drilling tool includes a drill shaft for transmitting axial load, comprising a series of coaxial ring members connected together such that adjacent ring members are flexible in an axial plane relative to each other; each ring member being connected to an adjacent ring member by connecting member arranged to transmit torque therebetween; and axial supports extend between adjacent ring members so as to transmit axial loads therebetween.
申请公布号 US2012160571(A1) 申请公布日期 2012.06.28
申请号 US201213342209 申请日期 2012.01.03
申请人 ORBAN JACQUES 发明人 ORBAN JACQUES
分类号 E21B11/00;E21B7/20 主分类号 E21B11/00
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