Patent ID: 6059037
Filing Date: 2000-05-09
Classification: E21B

Abstract:
Apparatus for forming an opening through a protective liner lining a first wellbore, the first wellbore intersecting a second wellbore, a first portion of the liner extending at least partially axially within the second wellbore, a second portion of the liner extending laterally across the second wellbore, and a third portion of the liner extending laterally outward from the second wellbore, the apparatus comprising:a gripping structure, the gripping structure being operatively disposable within the liner third portion and being capable of grippingly engaging the liner third portion; andan axially elongated milling guide having a profile formed thereon, the milling guide being capable of insertion at least partially into the liner first and second portions, and the milling guide being capable of axially engaging the gripping structure.