发明名称 Pipe spinning tool
摘要 A well pipe spinner having two body parts carrying rollers adpated to engage a pipe at different locations about its periphery and grip and spin the pipe by rotation of one or more of the rollers, with the two body parts being mounted by pivotal connections for swinging movement about two spaced axes respectively to grip and release the pipe, and with an adjustable connection attaching the two pivotal connections together for relative lateral adjusting movement to shift their pivotal axes toward and away from one another for gripping different sizes of pipe.
申请公布号 US4446761(A) 申请公布日期 1984.05.08
申请号 US19810257105 申请日期 1981.04.24
申请人 VARCO INTERNATIONAL, INC. 发明人 BOYADJIEFF, GEORGE I;MONAHAN, FREDERICK A.
分类号 E21B19/16;(IPC1-7):B25B17/00 主分类号 E21B19/16
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