公开(公告)号：US10107053B2

公开(公告)日：2018-10-23

申请号：US15150464

申请日：2016-05-10

申请人： Weatherford Technology Holdings, LLC

发明人： Ram K. Bansal ,  Joe Noske ,  Miroslav Mihalj ,  Bill Menard ,  Thomas F. Bailey ,  David Pavel ,  Gerald Wes Don Buchanan ,  Geoff George ,  David Vieraitis

IPC分类号： E21B21/08 ,  E21B21/10 ,  E21B34/12

摘要： A method for drilling a wellbore includes disposing a tubular string in the wellbore, wherein the tubular string includes a drill bit disposed at a bottom and a flow sub disposed on a top; injecting drilling fluid through a bore valve in the flow sub to rotate the drill bit; moving a sleeve in the flow sub to engage and close the bore valve; moving the sleeve independently from the bore valve to expose a flow port formed through a wall of the flow sub; and injecting the drilling fluid into the flow port while adding a stand to the top of the tubular string, wherein injection of drilling fluid into the tubular string is continuously maintained between drilling and adding the stand to the tubular string.

公开(公告)号：US10006262B2

公开(公告)日：2018-06-26

申请号：US14617270

申请日：2015-02-09

申请人： Weatherford Technology Holdings, LLC

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

IPC分类号： E21B21/10 ,  E21B19/16 ,  E21B21/06 ,  E21B3/00 ,  E21B34/14 ,  E21B34/00

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.