The Plug Holder is
located below the Stinger. It is supposed to hold the Wiper Plug. in position
until the dart lands inside the Wiper Plug.
For hydraulic Liner
Hanger systems the Plug Holder has flow ports in order to allow
to build up pressure between the Wiper Plug. and the Pack off Bushing. In order to reduce
any friction on the cups due to the release of a mechanic Setting Tool, the
Plug Holder has the option to allow rotation of the Stinger so that the Plug
Holder will stay in position. Further, a special
shoulder provides the contact area to retrieve the Pack off Bushing with
releasing sleeve by releasing the Pack off Bushing’s dog system.