公开(公告)号：US06595289B2

公开(公告)日：2003-07-22

申请号：US09849043

申请日：2001-05-04

申请人： David Moore Tumlin ,  Gene K. Fugatt, Sr. ,  David Hosie ,  Mike Luke

发明人： David Moore Tumlin ,  Gene K. Fugatt, Sr. ,  David Hosie ,  Mike Luke

IPC分类号： E21B33138

CPC分类号： E21B43/112 ,  E21B33/134 ,  E21B43/1185 ,  E21B43/11852 ,  E21B43/11855

摘要： The present invention provides a method and apparatus for plugging a wellbore in a trip saving manner. In one aspect, the invention includes a cement retainer disposed on a run-in string and a radially expanded perforating assembly disposed below the cement retainer. In a single run, the apparatus provides for perforating a wellbore and squeezing cement through the perforations and into the formation therearound. In another aspect, a method of plugging the wellbore includes running a cement retainer and a radially expanded perforating assembly into a wellbore on a run-in string. After the cement retainer is set, a firing head is actuated to cause the perforating gun to discharge. After perforations are formed, cement is introduced from the cement retainer into the isolated area and squeezed through the perforations. Thereafter, the run-in string disengages from the cement retainer leaving behind the plug formed. In yet another aspect, a firing head capable of being actuated by different means is used to discharge the perforating assembly.