Direct drive, comprising a locking, for a deep hole boring trepan, or a similar tool that operates in a borehole

摘要

A.entrainement trepan directly to a deep hole boring tool or a similar working in a wellbore. / p & & p & b.entrainement characterizes in that it comprises a first locking socket 19 associated with the drive shaft 5 and a second locking socket 20 associated with the housing of the support 8, which may be bound engaged or disengaged by displacements relating to the drive shaft 5 and of the housing of the support 8, a safety guard 26 being also provided which opposes the input in of the locking bushes 19, 20, a resistance which can be surmounted determine by an axial force directed towards the above applies to the casing of the support 8. / p & & p & c.l' invention applies in particular the drill bits.