发明名称 Suspension of pipe spinner
摘要 A pipe spinner is provided which includes two parts carrying rollers and mounted by two pivotal connections for swinging movement between a closed position in which the rollers grip and drive a well pipe or the like and an open position releasing the pipe, with an adjustable connection attaching the two pivotal connections together for relative lateral movement to shift the two pivotal axes toward and away from one another for gripping different sizes of pipe, and with the spinner including a hanger or support structure attached to the mentioned adjustable connection and adapted to be suspended by a line or other element in a manner suspending the entire tool through the adjustable connection.
申请公布号 US4425827(A) 申请公布日期 1984.01.17
申请号 US19820351462 申请日期 1982.02.23
申请人 VARCO INTERNATIONAL, INC. 发明人 WELLS, LAWRENCE E.
分类号 E21B19/16;(IPC1-7):B25B13/50 主分类号 E21B19/16
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