发明名称 Indicator and method
摘要 An indicator comprising a band having a first radial dimension; one or more protectors having a greater radial dimension and disposed sufficiently proximate the band to substantially avoid wear of the band during running of the indicator and method.
申请公布号 US8109333(B2) 申请公布日期 2012.02.07
申请号 US20090437305 申请日期 2009.05.07
申请人 YEE CHEE KONG;BAKER HUGHES INCORPORATED 发明人 YEE CHEE KONG
分类号 E21B23/03;E21B47/09 主分类号 E21B23/03
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