Retrievable pre-milled window with deflector

摘要

An apparatus for drilling one or more holes at an angle to a wellbore. The apparatus includes a tubular housing defining one or more openings. Each opening is configured to provide an exit through which a drilling assembly drills to form a hole at an angle to the wellbore. The apparatus further includes one or more deflectors. Each deflector defines a surface for guiding the drilling assembly through an opening, and each deflector is positioned inside the tubular housing such that the surface is facing the opening. The apparatus further includes an anchor having a bottom portion attached to a top portion of the tubular housing and having a top portion configured to be removably fixed to a conveyance tubular.