Mud filter

A wellbore tool usable to capture and retain debris from drilling fluid entering a drill string (300) and prevent debris-laden fluid from entering sensitive BHA components, comprising:

• a tubular body with selectively connectable threaded connections to the drill string (300) and/or workstring and housing a sub-assembly (600), comprising;
• a steel tubular screen and/or mesh (2) with an outer diameter smaller than an inside diameter of the tubular body supported within a bore of the tubular body by a dart support member (13) and a tapered conical support member, allowing for an annular collection gap surrounded by a set of magnetic bars (15),
• a bristle ring (6) or a set of bristle rings mounted in a bore of the steel tubular screen and/or mesh (2) used independently or in conjunction with a rupture disc, (7) which prevents fluid from entering a bore of the wellbore tool and diverts it around towards the annular collection gap between the inside diameter of the tubular body and outer diameter of the steel tubular screen and/or mesh (2), and wherein the rupture disc (7) can be burst by a change in pressure or by applying a load against a membrane of the rupture disc.