Patent ID: 6216787
Filing Date: 2001-04-17
Classification: E21B

Abstract:
A method of retrieving metal particles from a well bore, comprising the following steps:providing a tool body having a central opening therein;providing a plurality of magnet assemblies longitudinally spaced along said tool body, each magnet assembly comprising a plurality of magnet members, said magnet members covering a majority surface area of said tool body, exterior surfaces of said magnet members defining metal particles settling area;detachably non-rotatable securing each of said magnet members on said tool body;lowering said body into the well bore and imparting rotation to said tool body, thereby creating a magnetic field and causing metal particles to settle on said magnet assemblies;providing a magnet protector for each of said magnet members for deflecting a striking force of said metal particles on said magnet members; andforming one side of each of said magnet protectors with a length greater than a corresponding side of the immediately adjacent magnet member to thereby protect the immediately adjacent magnet member from striking force of metal particles being attracted by the magnet member.