DOWNHOLE MAGNETIC RETRIEVAL APPARATUS

摘要

A tool for removal of magnetic debris from a well bore, having a plurality of magnets retained in a plurality of recesses by a plurality of retainer caps which are threadable into the recesses. The retainer caps can be made of non-magnetic material, and non-magnetic spacers can be used, to isolate the magnets from the tool body and the surroundings. The retainer caps can be positioned entirely within the recesses, to streamline the tool body. The magnets can be removed from the recesses and replaced.