Patent ID: 6202752
Filing Date: 2001-03-20
Classification: E21B

Abstract:
A method for milling an opening in a liner, the liner having a first portion in a primary wellbore extending down into earth from an earth surface and a second portion in communication with the first portion and extending into a lateral wellbore extending from and in communication with the primary wellbore, the opening for re-establishing communication between an interior of the liner and the primary wellbore, the method comprisinginserting a milling system down the wellbore into the liner, the milling system comprising at least one mill, a tubular to which the at least one mill is connected, a plurality of spaced-apart stabilizing members on the tubular and the stabilizing members for maintaining position of the at least one mill for milling through the liner into the main wellbore, the tubular connected to a rotatable tubular string extending up to the earth surface,rotating the milling system by rotating the tubular string to mill the liner, andmaintaining with the stabilizing members a desired position of the mill with respect to the liner being milled.