AN ASSEMBLY AND METHOD FOR FORMING A SEAL IN JUNCTION OF A MULTILATERAL WELLBORE

摘要

This invention relates to an assembly and method for forming a hydraulic sealat the junction of a multilateral well bore drilled through a window in atleast a main well bore comprising a tubular member which is run into the wellbore casing and has a sealing member positioned about the tubular member forseating, at least one orientation member being provided for orientation of thetubular member and sealing member in the main well bore casing, and having atubular sleeve member for insertion in the well bore which has an aperturethrough at least one side of the tubular sleeve member for alignment of theaperture with the window and having a seating surface on the inside of thetubular sleeve member proximate the aperture, with the aperture in someembodiments being adjustable, and having a deflection member positioned andreleasable sealed in the tubular sleeve member for deflecting the tubularmember through the window in the well bore when the tubular member is run intocontact with the deflection member, and having at least one orientation memberfor orientation of the deflection member relative to the window in the atleast well bore casing and for aligning the aperture in the tubular sleevewith the window and a method of using the assembly to form a seal at thejunction which can be executed in one run into the well bore casing in atleast one embodiment.