The apparatus and method of the present invention facilitate the initiation of lateral bores from a main wellbore in a completed well having a packer and a tubing string. The preferred method involves setting a plug, which may be removed, through the tubing string, followed by a layer of sand, followed...http://www.google.fr/patents/US5423387?utm_source=gb-gplus-shareBrevet US5423387 - Method for sidetracking below reduced-diameter tubulars
Method for sidetracking below reduced-diameter tubulars
