Yesterday a BHA with a 12 1/4" bit was run down the hole. Last nigth, at 21:45 pm, drilling into the float collar started at 1937.3 m depth. Early this morning, at 1970.4 m depth, drilling into fill-in mud, i.e. loose debris, underlying the casing shoe started. The fill-in debris, estimated 35 m thick, is beeing drilled carefully with an average ROP of 1-2 m/hour.