Well tool

Abstract

The present invention provides a well tool (1) for removing metal debris from a well bore, comprising a magnet element (2), an anti -torque anchor (5), a debris removal unit (3), a debris container (6) and a first connecting end (16) for a rotatable well string, wherein the magnet element (2) comprises a cylinder-shaped housing (10) having a first end (7) and a second end (8); the debris removal unit (3) comprises a helix-shaped longitudinal guide element (4) arranged around the cylinder-shaped housing (10); the anti-torque anchor (5) is operably connected to the cylinder- shaped housing (10) or the helix-shaped longitudinal guide element (4), such that actuation of the anti-torque anchor during use will prevent rotation of the cylinder- shaped housing (10) or the helix -shaped longitudinal guide element (4), respectively, relative the well-bore; and the debris container (6) comprises an opening (9) arranged at the second end (8) of the cylinder-shaped housing, wherein the cylinder- shaped housing (10) and the helix-shaped longitudinal guide element (4) are rotatable relative each other around a centreline (C) of the well tool, and configured such that metal debris accumulating on the cylinder -shaped housing (10) during use is guided by the helix-shaped longitudinal guide element (4) towards the opening (9) of the debris container (6) when the anti -torque anchor (5) is actuated and the first connecting end is rotated.