SEALING BETWEEN ALIGNABLE WINDOWS FOR LATERAL WELLBORE DRILLING

摘要

Sealing may be provided between alignable windows for lateral wellbore drilling. A method for use with a lateral wellbore includes the steps of : positioning a swellable seal material between a closure device and a housing of a window assembly; swelling the seal material to thereby prevent fluid transfer through a window formed in a sidewall of the housing; and then installing the window assembly in a parent wellbore. A lateral wellbore system includes a window assembly with a window formed through a sidewall of a generally tubular housing, and a swollen seal material preventing fluid transfer through the window. A window assembly includes a generally tubular housing having a window formed through a sidewall of the housing, a closure device having another window formed through a wall of the closure device; and a swellable seal material which prevents fluid transfer between the windows.