发明名称 MEANS FOR MODIFYING SUCKER ROD
摘要 Method and apparatus for removing a scraper apparatus from the outer peripheral wall surface of a sucker rod comprising pulling the rod through a die wherein the die has an inner surface which circumferentially and slidably surrounds a marginal exterior length of the rod so as to enable part of the die to abuttingly engage the scraper apparatus in a manner which strips the scraper free from the rod.
申请公布号 US3750261(A) 申请公布日期 1973.08.07
申请号 USD3750261 申请日期 1971.08.09
申请人 RODCO INC,US 发明人 IGLEHART J,US;IGLEHART H,US
分类号 E21B17/00;E21B37/02;(IPC1-7):B23P19/02 主分类号 E21B17/00
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