发明名称 CASING RUNNING HEAD
摘要 The present invention generally relates to a method and apparatus for drilli ng with a top drive system. In one aspect, the present invention provides a tubular gripping member for use with a top drive to handle a tubular comprising a housing operatively connected to the top drive and a plurality of gripping elements radially disposed in the housing for engaging the tubular, wherein moving the housing relative the plurality of gripping elements causes the plurality of gripping members to engage the tubular.
申请公布号 CA2507583(A1) 申请公布日期 2005.11.20
申请号 CA20052507583 申请日期 2005.05.17
申请人 WEATHERFORD/LAMB, INC. 发明人 PIETRAS, BERND-GEORG
分类号 E21B;E21B3/02;E21B19/00;E21B19/02;E21B19/04;E21B19/06;E21B19/07;E21B19/08;E21B19/10;E21B19/16;(IPC1-7):E21B19/10 主分类号 E21B
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