Coupling piece used in the simultaneous drilling of earth and / or rock with a percussion device and the upper rotary device lower percussion.

摘要

The coupling piece comprises a first connection (2) for connection to a striking device ROTARY SUPERIOR (3) and a connection (4) TO CONNECT TO A Rastra drill pipe (5) which has a BARRENA VOID (23) . The coupling piece comprises a first chamber (11) and a second chamber (12) separated by a piston (10). The pressure in the first chamber (11) is used to feed a percussion device LOWER (8) connected to a third connection (6) associated with the coupling with the drive means and feed the percussion device LOWER (8 ) TO THE GROUND (15). The pressure of the second chamber (12) is used to reduce the force between the percussion device LOWER (8) and land (15) when added OTHER ELEMENTS OF DRILLING TO SARTA DRILLING (7) of which forms part LOWER PERCUSSION DEVICE (8).