Application
The Whipstock is designed to provide necessary deviation of window mills and reamer mills from the axis of main wellbore during “window” cutting operation in production casing.
It is also used for deviation of cutting and drilling tools while drilling an additional borehole in the well.
Construction
To trip, set and cut "window" in casing in a single trip the Whipstock is used in conjunction with Starting-Window Mill.
The Whipstock is used with the bottom-hole support (cement plug or packer plug).