Abstract: Apparatus and associated methods of using provide convenient and economical forming of an opening through a tubular structure in a subterranean well. In a preferred embodiment, a milling guide has a guide profile formed thereon which is operative to guide a cutting tool to contact the tubular structure. An anchor portion of the milling guide grippingly engages the tubular structure to thereby axially and rotationally align the milling guide with the tubular structure. A hydraulic advance mechanism axially displaces the cutting tool relative to the milling guide.

Abstract: Apparatus for completing a subterranean wellbore and associated methods of using provide relatively uncomplicated and convenient access to a parent wellbore lower portion from a lateral wellbore liner which extends into the parent wellbore above the lower portion. The apparatus is utilized to form an opening through a portion of the liner which overlies the parent wellbore lower portion, thereby providing access thereto. In a preferred embodiment, the apparatus includes a milling guide having an axially extending guide profile formed therein, which guide profile is capable of directing a mill toward the liner portion to form the opening. The milling guide is capable of being anchored in the liner to thereby fix its axial and rotational alignment relative to the liner portion.

Abstract: Apparatus and associated methods of using provide convenient and economical forming of an opening through a tubular structure in a subterranean well. In a preferred embodiment, a milling guide has a guide profile formed thereon which is operative to guide a cutting tool to contact the tubular structure. An anchor portion of the milling guide grippingly engages the tubular structure to thereby axially and rotationally align the milling guide with the tubular structure.

Abstract: Apparatus and associated methods of using same provide ease of forming an opening through a laterally extending liner to thereby provide access to a portion of a parent wellbore across which the liner extends. In a preferred embodiment, a milling guide has a guide profile formed thereon for directing a cutting tool to contact the liner. The milling guide is cooperatively engageable with an anchor to axially and radially align the guide profile with a portion of the liner which extends across the parent wellbore.