Sealed lateral wellbore junction

摘要

The present invention relates to downhole drilling operations, and more particularly, to the completion of lateral boreholes. Apparatus ( 100 ) is provided comprising a tubular liner portion ( 108 ) for lining a portion of a lateral borehole adjacent an opening of a borehole into the lateral borehole. An end portion of said tubular liner portion ( 108 ) is provided with a flange element ( 102 ) having a curved surface for locating in abutment with an area of main borehole surrounding said opening. A method of using said apparatus ( 100 ) is also provided.