If a slick assembly is required, i.e. one in which no bottom hole stabilisation is necessary then the stabiliser sleeve may readily be removed and replaced by a reduced diameter protective sleeve matching the outer diameter of the shoulder flange.
http://www.patentstorm.us/patents/4844179-description.html

Slick assembly - a downhole assembly that has no stabilizers. It is used to drill a straight hole.
http://books.google.com/books?id=D4I-G0DcTcUC&pg=PA527&lpg=P...