Patent ID: 6308781
Filing Date: 2001-10-30
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 a primary metal particles settling area;detachably non-rotatably securing each of said magnet members on said tool body;providing a magnet protector for each of said magnet members and forming a trap space between each of said magnet members and a magnet protector of an immediately adjacent magnet member, thereby creating a secondary metal particles settling area;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.