Abstract: A magnet assembly for a debris collection tool includes first and second annular end bands, between which is disposed an annular arrangement of magnets. The magnet assembly includes a plurality of bridges, each bridge disposed between the first and second annular end bands and between circumferentially adjacent magnets of the annular arrangement of magnets. The first and second annular end bands are substantially of a non-magnetic material, and the bridges are substantially of a magnetic material.

Abstract: A method and apparatus for operating a debris removal tool. In one embodiment, the tool includes a cover assembly having a plurality of covers spaced from one another along the length of the assembly creating a gap between adjacent covers. A carrier disposed within the cover assembly is axial movable relative thereto and has a plurality of magnet groups spaced from one another along its length. In an unactuated position of the tool, each of the plurality of magnet groups is under one of the plurality of covers and in an actuated position, each of the plurality of magnets is in a gap between covers.

Abstract: A magnet assembly for a debris collection tool includes first and second annular end bands, between which is disposed an annular arrangement of magnets. The magnet assembly includes a plurality of bridges, each bridge disposed between the first and second annular end bands and between circumferentially adjacent magnets of the annular arrangement of magnets. The first and second annular end bands are substantially of a non-magnetic material, and the bridges are substantially of a magnetic material.

Abstract: A debris collection tool includes a mandrel having a longitudinal flowbore therethrough and an inner sleeve disposed around the mandrel. A first array of magnets is arranged on the inner sleeve. A second array of magnets is disposed around the inner sleeve. The first array of magnets is moveable with respect to the second array of magnets. The debris collection tool further includes an adaptor sleeve concentric with the mandrel and a linkage coupling the adaptor sleeve with the inner sleeve.

Abstract: A debris collection tool includes a mandrel having a longitudinal flowbore therethrough and an inner sleeve disposed around the mandrel. A first array of magnets is arranged on the inner sleeve. A second array of magnets is disposed around the inner sleeve. The first array of magnets is moveable with respect to the second array of magnets. The debris collection tool further includes an adaptor sleeve concentric with the mandrel and a linkage coupling the adaptor sleeve with the inner sleeve.

Abstract: A method and apparatus for operating a debris removal tool. In one embodiment, the tool includes a cover assembly having a plurality of covers spaced from one another along the length of the assembly creating a gap between adjacent covers. A carrier disposed within the cover assembly is axial movable relative thereto and has a plurality of magnet groups spaced from one another along its length. In an unactuated position of the tool, each of the plurality of magnet groups is under one of the plurality of covers and in an actuated position, each of the plurality of magnets is in a gap between covers.