发明名称 DUAL-FLOW VALVE AND SWIVEL
摘要 <p>A dual-flow valve includes an inner valve body defining a first flow path and an outer valve body circumscribing the inner valve body. The outer valve body and the inner valve body define a second flow path. The dual-flow valve includes a valve element disposed across the first flow path and the second flow path. The valve element has a first passage for selective flow alignment with the first flow path and a second passage for selective flow alignment with the second flow path. A dual flow swivel includes an upper and lower swivel body, with the lower body adapted to rotate relative to the upper body. Two separate flow paths extend through the swivel bodies allowing upwardly and downwardly directed flows through the swivel bodies.</p>
申请公布号 CA2804400(A1) 申请公布日期 2012.01.12
申请号 CA20112804400 申请日期 2011.07.06
申请人 NATIONAL OILWELL VARCO, L.P. 发明人 WEIR, JAMES WILLIAM;BENNETT, DEAN ALLEN
分类号 E21B34/12;E21B21/10 主分类号 E21B34/12
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