发明名称 HYDRAULIC SLEEVE VALVE WITH POSITION INDICATION, ALIGNMENT, AND BYPASS
摘要 A hydraulic sleeve valve that includes a valve position indication system that provides an indication that the valve has reached a predetermined position, such as, for example, the fully opened or fully closed condition. The hydraulic sleeve valve may include a bypass relief system and may also provide a valve control fluid circulation function to filter or otherwise manipulate the control fluid.
申请公布号 US2009159264(A1) 申请公布日期 2009.06.25
申请号 US20090352232 申请日期 2009.01.12
申请人 TURNER DEWAYNE M;ROSS RICHARD J 发明人 TURNER DEWAYNE M.;ROSS RICHARD J.
分类号 E21B34/00;E21B34/10;E21B34/12 主分类号 E21B34/00
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