公开(公告)号：US20180066497A1

公开(公告)日：2018-03-08

申请号：US15258575

申请日：2016-09-07

申请人： Saudi Arabian Oil Company

发明人： SHAOHUA ZHOU

IPC分类号： E21B33/14 ,  E21B7/20 ,  E21B23/03 ,  E21B10/00 ,  E21B34/10

CPC分类号： E21B33/146 ,  E21B7/20 ,  E21B10/00 ,  E21B23/03 ,  E21B33/13 ,  E21B34/102 ,  E21B2034/007

摘要： A system for cementing a tubular in a wellbore that includes a sleeve made up of an annular housing with a cement seal on outer surface of the housing. The sleeve further includes a sliding block, a stationary block, an arm attached to the sliding block, and a passage formed through a sidewall of the housing, and that receives a free end of the arm. When the sleeve inner bore is pressurized, the arm moves to move the sliding block into an open space in the stationary block. Inserting the sliding block into the open space forms a seal on the outer periphery of the sleeve which forms a barrier to cement flowing in an annulus between the sleeve and inner surface of the wellbore. Lost circulation material can be deposited in the annulus and which settles along an interface between the seal and wellbore wall.