公开(公告)号：EP2910728B1

公开(公告)日：2018-07-04

申请号：EP15154968.0

申请日：2015-02-13

申请人： Weatherford Technology Holdings, LLC

发明人： Bansal, Ram K. ,  George, Geoff ,  Buchanan, Gerald Wes Don ,  Cunningham, Justin ,  De Leon, Eisenhower ,  Noske, Joe ,  Ring, Lev ,  Leal, Jerlib J

IPC分类号： E21B19/16 ,  E21B21/06

CPC分类号： E21B21/106 ,  E21B3/00 ,  E21B19/16 ,  E21B21/06 ,  E21B34/14 ,  E21B2034/007

摘要： A flow sub for use with a drill string includes a tubular housing having a longitudinal bore therethrough and a flow port through a wall thereof and a ball. The ball is disposed in the housing above the flow port, has a bore therethrough, and is rotatable relative to the housing between an open position where the ball bore is aligned with the housing bore and a closed position where a wall of the ball blocks the housing bore. The flow sub further includes a seat disposed in the housing above the ball for sealing against the ball wall in the closed position and a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the housing bore and a closed position where a wall of the sleeve is disposed between the flow port and the housing bore.