Patent ID: 6056056
Filing Date: 2000-05-02
Classification: E21B

Abstract:
Wellbore apparatus comprisinga whipstock with a top and a bottom, the whipstock disposed in a wellbore extending down from an earth surface into the earth, the wellbore having an inner surface,a mill guide with a body having an upper end, a lower end, and a channel therethrough from the upper end to the lower end, anda portion of the lower end of the mill guide disposed between and held between the inner surface of the wellbore and an outer surface of the top of the whipstock,the mill guide having a main body having a lower part with a wall thickness, anda shoe at the lower end of the mill guide having a wall member whose thickness is less than the thickness of the lower part of the main body of the mill guide for facilitating emplacement of the mill guide between the wellbore's interior surface and the whipstock.