Apparatus for retrieving metal objects from a wellbore

  • US 6,216,787 B1
  • Filed: 10/21/1999
  • Issued: 04/17/2001
  • Est. Priority Date: 10/21/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. 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; and

    forming 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.

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