Patent ID: 7513299
Filing Date: 2009-04-07
Classification: E21B

Abstract:
1. An apparatus for retrieving metal objects from a wellbore, comprising: a cylindrical tool body with a central opening therethrough; a plurality of spaced-apart magnet assemblies configured for positioning in a surrounding relationship over at least a portion of said tool body, said magnet assemblies defining a primary settling area for the metal objects, each of said magnet assemblies comprising a magnet member encased in a sleeve mounted in contact with a respective magnet member and the tool body; and at least one spacer mounted between adjacent magnet assemblies, said spacer member defining a secondary settling area for the metal objects, an external diameter of said spacer being smaller than an external diameter of each of said magnet assemblies, and wherein each of said magnet assemblies and said spacer is capable of being detachably slidably mounted on said tool body to facilitate removal of each of said magnet assemblies and said spacer for repair and maintenance.