expansion unit to expand a tubular into a wellbore, top anchor, and method to expand a tubular into a wellbore

摘要

1/1 summary “Expansion unit to expand a tubular into a wellbore, top anchor, and method to expand a tubular into a wellbore” an expansion unit £ o to expand a tubular into a wellbore, the expansion unit including a top anchor comprising: a working column, a drive ring being coupled to the working column by a first releasable coupling, a ramp body having one or more ramp surfaces, said ramp body being releasably coupled to the working column by a second releasable coupling; one or more anchor segments each having one or more wedge surfaces corresponding to and engaging the ramp surfaces of the ramp body, one end of the segments engaging the drive ring; a release ring enclosing the working column and arranged at an opposite end of the segments; one or more key plugs connecting the release ring with the drive ring; and activating means to release the first releasable coupling.