公开(公告)号：US10774613B2

公开(公告)日：2020-09-15

申请号：US15908419

申请日：2018-02-28

申请人： Weatherford Technology Holdings, LLC

发明人： Gregory Gerard Gaspard ,  Douglas Brian Farley

IPC分类号： E21B17/00 ,  E21B33/12 ,  E21B33/14 ,  E21B33/16 ,  E21B34/06

摘要： A method for casing a subsea wellbore includes running a tieback casing string into the subsea wellbore using a workstring including first, second, and third wiper plugs. The method further includes: launching a first release plug or tag into the workstring; pumping cement slurry into the workstring, thereby driving the first release plug or tag along the workstring; after pumping the cement slurry, launching a second release plug or tag into the workstring; and pumping chaser fluid into the workstring, thereby driving the release plugs or tags and cement slurry through the workstring. The release plugs or tags engage and release the respective wiper plugs from the workstring. The first wiper plug or release plug ruptures, thereby allowing the cement slurry to flow therethrough. The method further includes: stabbing the tieback casing string into a liner string; and retrieving the workstring, the workstring still including the third wiper plug.

公开(公告)号：US09797220B2

公开(公告)日：2017-10-24

申请号：US14639309

申请日：2015-03-05

申请人： Weatherford Technology Holdings, LLC

发明人： Gregory Gerard Gaspard ,  Douglas Brian Farley

IPC分类号： E21B33/14 ,  E21B33/16 ,  E21B33/12 ,  E21B17/00 ,  E21B34/06

CPC分类号： E21B33/143 ,  E21B17/00 ,  E21B33/12 ,  E21B33/16 ,  E21B34/06

摘要： A method for casing a subsea wellbore includes running a tieback casing string into the subsea wellbore using a workstring including first, second, and third wiper plugs. The method further includes: launching a first release plug or tag into the workstring; pumping cement slurry into the workstring, thereby driving the first release plug or tag along the workstring; after pumping the cement slurry, launching a second release plug or tag into the workstring; and pumping chaser fluid into the workstring, thereby driving the release plugs or tags and cement slurry through the workstring. The release plugs or tags engage and release the respective wiper plugs from the workstring. The first wiper plug or release plug ruptures, thereby allowing the cement slurry to flow therethrough. The method further includes: stabbing the tieback casing string into a liner string; and retrieving the workstring, the workstring still including the third wiper plug.