The invention relates to a radial driller for drilling a hole in a well tubular, the radial driller comprising a rotating sleeve that is rotated by means an axial drive organ via an angular gear, the rotating sleeve housing a partially closed cylinder, the cylinder housing a hydraulic piston, a first hydraulic chamber situated below the hydraulic piston, and a second hydraulic chamber situated above the hydraulic piston, the hydraulic piston having a connecting rod arrangement extending above the piston and through an opening in a dividing wall dividing the cylinder from a multipurpose section, and a drill bit connected to the hydraulic piston via the connecting rod arrangement. According to the invention, the radial driller further comprises a multipurpose element positioned directly below the drill bit, the multipurpose element defining a retracting chamber between the multipurpose element and the dividing wall.