Patent ID: 9010444
Filing Date: 2015-04-21
Classification: E21B

Abstract:
1. A device used in maintenance of a hydrocarbon producing well, said device comprising a substantially straight, elongate, rigid member; a metallic mounting block; said mounting block having a distal end, a proximal end and an outer side wall extending between said distal end and said proximal end; means for attaching said proximal end of said mounting block to a distal end of said rigid member; a circumferential depression extending inwardly from a distal end of said mounting block; a magnet having a substantially circular perimeter is received in its entirety in said circumferential depression in said mounting block, with an inner face of said magnet abutting an inner end of said circumferential depression; a metallic cup member having a substantially planar end wall, with a peripheral wall extending from a perimeter of said planar end wall, so that a free distal end of said peripheral wall terminates in an otherwise open end facing away from said planar end wall of said cup member; said peripheral wall of said cup member having an internal surface that has a circumferential shape corresponding to an outer circumferential shape of said outer side wall of said mounting block; said internal face of said peripheral wall of said cup member having a circumferential dimension that is slightly less than a corresponding circumferential dimension of said outer side wall of said mounting block so that said peripheral wall of said cup member is press fit around said outer side wall of said mounting block thereby permanently retaining said magnet tightly in said circumferential depression in said mounting block; and said rigid member, said mounting block and said cup member having circumferential dimensions that will allow said mounting block, said cup member and said rigid member to be inserted longitudinally into said hydrocarbon producing well.