Drill bit having a number of roller bits for drilling a ground surface, and a method for detaching a drill bit with a number of roller bits drilling a ground surface from a pipe shoe in the sunk state

摘要

the invention relates to a required (1) with a number of rollmeiu00dfeln (1.1.1, 1.2.1, 1.3.1) for drilling a workshop. the number of rollmeiu00dfeln (1.1.1, 1.2.1, 1.3.1) is a bohrkopfkranz (1.4) the required (1) arranged and there is a means to solve the intractable internal connection between the bohrkopfkranz (1.4) and a rohrschuh (2).the invention concerns also a method to solve a number of rollmeiu00dfeln (1.1.1, 1.2.1, 1.3.1) for drilling a workshop for labour required (1) by a rohrschuh (2) in abgeteuftem condition, whereby a connection between a bohrkopfkranz (1).4) the required (1) and (2) rohrschuh internally is solved by solving the required (1) triggering entriegelungsbolzen (5) in the bohrkopfkranz (1.4) is introduced.