Abstract: Method and device to increase the feed speed of a drill bit (2) and its associated drilling device (1) when drilling through tubulars (6, 8, 10) located within one another where in the annuli (12, 14) created between the tubulars (6, 8, 10) there is located a material or a fluid which in comparison to the pipe wall material is easer to drill, and where the feed speed of the drill bit (2) is controlled by a pressure fluid regulating valve (52) which preferably is located close to the drilling device (1), and where there during the progress of the drill bit (2) through the annulus (12, 14) is opened for an influx of pressure fluid in parallel with the pressure fluid regulating valve (52).