发明名称 DRILL PIPE ELEVATORS AND METHODS OF MOVING DRILL PIPE
摘要 This invention includes drill pipe elevators and methods of moving drill pipe. In one implementation, a drill pipe elevator includes first and second separable pieces. Each piece comprises a drill pipe-receiving groove, and a pair of diametrically opposed projections with each projection forming only part of a pair of diametrically opposed lifting posts. The first and second separable pieces when positioned together define the pair of diametrically opposed lifting posts from the pair of diametrically opposed projections and define a drill pipe-receiving passageway through the drill pipe elevator that is oriented transversely between the lifting posts.
申请公布号 WO2009055213(A3) 申请公布日期 2009.07.16
申请号 WO2008US78302 申请日期 2008.09.30
申请人 ROCK WELL PETROLEUM INC.;ZENI, JOHN 发明人 ZENI, JOHN
分类号 E21B19/06;E21B19/15 主分类号 E21B19/06
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