Patent ID: 8763701

Claim:
A window joint for lateral wellbore construction, the window joint comprising: a tubular member operable to be interconnected within a tubular string; a preformed window formed in the tubular member, the preformed window defined by at least one score line that creates a preferentially weakened region within the tubular member enabling internal removal of the preformed window in a predictable manner, the at least one score line having at least one section extending circumferentially about a portion of the tubular member and at least one section extending longitudinally about a portion of the tubular member; and a generally radially extending tab disposed on an interior surface of the preformed window, the tab having a first surface that is operably engagable with a window removal tool to enable internal removal of the preformed window, the tab having a second surface that is oppositely disposed from the first surface and is defined by at least a portion of the at least one score line.