公开(公告)号：US10443342B2

公开(公告)日：2019-10-15

申请号：US15575492

申请日：2016-05-20

Applicant: STATOIL PETROLEUM AS

Inventor： Morten Eidem ,  Rune Haugom

IPC: E21B21/10 ,  E21B23/06 ,  E21B33/127 ,  E21B34/14

Abstract: A method of sealing an annulus around a drill-pipe when drilling down-hole includes providing a deflated packer on a drill-pipe when drilling down-hole; opening one or more ports to the packer using a ball-activated valve; and circulating drilling fluid to inflate said packer through said one or more ports, to thereby form a seal in the annulus around the drill-pipe. An apparatus to carry out this method is also provided.