Patent ID: 6315054
Filing Date: 2001-11-13
Classification: E21B

Abstract:
An assembly for locating lateral well bores drilled from a main wellbore casing for positioning members with respect to said lateral wellbore and said main wellbore casing and for orientating and positioning reentry, completion and work over devices for entry into said lateral well bores comprising,a first wellbore casing means,a window means formed in and through said first wellbore casing means,a sill means formed in said first wellbore casing means for defining said window means in said first wellbore casing means,an up hole apex means formed by said sill means of said window means being convergently curved up hole to said up hole apex means in said first wellbore casing means,at least a second wellbore means proximate and in communication with said window means and extending from said first wellbore casing means,a tubular string means,a housing means movably disposed in said first wellbore casing means for being run into said first wellbore casing means by said tubular string means, and connected to said tubular string means, anda key means connected to said housing for opening in said window means and for being moved up hole in said window means and for following said sill means of said window means toward said up hole apex means in said sill means of said window means in said first well bore casing means for orientating and positioning said housing means relative to said window means upon up hole movement of said housing means.