发明名称 DRILL PIPE HANDLING APPARATUS
摘要 Drill pipe handling apparatus for taking pipe from a well derrick floor to a pipe rack, wherein the pipe is transferred to a lower pivotable pipe support disposed in proximity to the pipe rack, and the pipe is then gradually lowered from said pipe support onto the pipe rack by a pivoting of the pipe support, and with the pipe supported during its lowering on a pair of pipe support arms extending laterally relative to the pipe support and pivoting in response to the weight of the pipe thereon.
申请公布号 US3785506(A) 申请公布日期 1974.01.15
申请号 USD3785506 申请日期 1971.09.10
申请人 ROGER A CROCKER,US 发明人 CROCKER R,US;SCHOOLCRAFT J,US
分类号 E21B19/15;(IPC1-7):E21B19/00 主分类号 E21B19/15
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