公开(公告)号：CA2881891C

公开(公告)日：2018-06-19

申请号：CA2881891

申请日：2015-02-12

Applicant: WEATHERFORD/LAMB INC

Inventor： BANSAL RAM K ,  GEORGE GEOFF ,  BUCHANAN GERALD WES DON ,  CUNNINGHAM JUSTIN ,  DE LEON EISENHOWER ,  NOSKE JOE ,  RING LEV ,  LEAL JERLIB J

IPC: E21B34/14 ,  E21B21/08

Abstract: 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.