公开(公告)号：US07017682B2

公开(公告)日：2006-03-28

申请号：US10677871

申请日：2003-10-02

申请人： Kwong-Onn C. Chan ,  Behrooz Movaffagh ,  Xiaoping He ,  Loren Pierre Boisvert

发明人： Kwong-Onn C. Chan ,  Behrooz Movaffagh ,  Xiaoping He ,  Loren Pierre Boisvert

IPC分类号： E21B17/18

CPC分类号： E21B17/07 ,  E21B17/18 ,  E21B34/12

摘要： A valve assembly connects into a drill string for opening and closing a passage within the drill string. The valve assembly has an inner valve member for opening and closing an inner passage of the drill string. The valve member moves between the open and closed positions in response to axial movement of the drill string. Lifting the drill string causes the upper portion to move upward relative to the lower portion, bringing along with it the valve member, while the valve sleeve remains stationary with the lower portion, opening the valve. The valve assembly can include an annular valve assembly for opening and closing an annular passage located around the inner passage. The annular valve assembly is opened and closed by increasing the pressure in the annular passage above the annular valve assembly.

摘要翻译： 阀组件连接到用于打开和关闭钻柱内的通道的钻柱。 阀组件具有用于打开和关闭钻柱的内部通道的内部阀构件。 阀构件响应于钻柱的轴向运动而在打开位置和闭合位置之间移动。 抬起钻柱使得上部相对于下部向上移动，与阀构件一起，同时阀套与下部保持静止，打开阀。 阀组件可以包括用于打开和关闭位于内部通道周围的环形通道的环形阀组件。 环形阀组件通过增加环形阀组件上方的环形通道中的压力来打开和关闭。