Patent ID: 6076602
Filing Date: 2000-06-20
Classification: E21B

Abstract:
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, apparatus comprising:a gripping structure, the gripping structure being operatively disposable within the liner first portion and being capable of grippingly engaging the liner first portion; andan axially elongated milling guide having a guide profile formed thereon and an axially extending passage formed externally thereon, the milling guide being capable of insertion at least partially into the liner second portion, the milling guide being axially attached to the gripping structure, such that the milling guide is axially positionable relative to the liner by gripping engagement of the gripping structure with the liner, and the milling guide further having opposite ends, one of the opposite ends being receivable in the liner third portion and being capable of restricting lateral displacement of the milling guide relative to the liner third portion.