发明名称 UNIVERSAL JOINT ARRANGEMENT FOR DOWNHOLE TOOLS
摘要 The universal joint arrangement includes a first adapter having two projecting support formations; a drive plate having a first pair of matching depressions or pockets is seated with these depressions on the projecting support formations of the first adapter and the drive plate has a second pair of pockets for the projecting support formations of a respective second adapter.
申请公布号 CA1314863(C) 申请公布日期 1993.03.23
申请号 CA19890596696 申请日期 1989.04.14
申请人 COMPUTALOG GEARHART LTD. 发明人 FOOTE, DEAN
分类号 E21B4/02;E21B17/05;F16D3/38 主分类号 E21B4/02
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