发明名称 Drifting tubing
摘要 A method of checking for restrictions in a string of tubing formed of a plurality of tubing sections. The method involves providing a profile in the tubing string, providing a drift member adapted to engage with the profile, passing the drift member through the tubing string, and determining whether the drift member has engaged with the profile prior to separating the tubing sections.
申请公布号 US7472749(B2) 申请公布日期 2009.01.06
申请号 US20050552109 申请日期 2005.10.04
申请人 CHURCHILL DRILLING TOOLS LIMITED 发明人 CHURCHILL ANDREW PHILIP
分类号 E21B23/02;E21B23/08;E21B41/00;E21B47/09 主分类号 E21B23/02
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