| 摘要 |
A downhole tool (100) includes a cutter (112a) rotatably mounted to a journal (113a). The journal (113a) is fastened to a downhole tool frame (101a, 101b) with a fastener (115a, 115b, 115c, 115d). The fastener (115a, 115b, 115c, 115d) is engaged by an insert (117a, 117b, 117c, 117d) and retainer (118a, 118b) so it is restricted from rotating. The insert (117a, 117b, 117c, 117d) extends over a head (120a, 120b, 120c, 120d) of the fastener (115a, 115b, 115c, 115d), and the retainer (118a, 118b) extends over the insert (117a, 117b, 117c, 117d). |
