A provision of a drill for Drilling WellIntended to be used to drill a Hole of a Casing and comprises a drill with a Neck or a Shaft to be inserted in a Baboon in a Drill which comprises a shoe lining that can be applied at the front end of Casing and tubing that is designed to move.

摘要

An arrangement at a drill includes a drill bit intended to be inserted at its neck into a chuck in a down-the-hole drill, a control means for guiding the drill and a lining pipe, a coupling arrangement in the form of a bayonet coupling or similar with which the drill can be coupled to the control means in a manner that allows them to be separated and that in its freed condition allows the drill, together with the down-the-hole drill, to be withdrawn through the lining pipe, a flushing passage for the supply of flushing agent in front of the drill and an evacuation passage for the removal of drilling cuttings together the flushing agent. It also includes a casing shoe that can be applied at the forward end of the lining pipe and a contact surface arranged at a stationary part of the down-the-hole drill.