DRILLS FOR THE PRODUCTION OF LARGE DIAMETERS AND LARGE DEEP HOLES AND METHOD FOR CARRYING OUT SUCH HOLES

摘要

A drill for drilling wide diameter and high depth holes in the soil including a base machine (1) having a rotary (2) that is equipped with a clamp (9) and, by means of translation cylinders (8), rotates and axially moves a series of drill stem (7) having a tool (6) at the free end thereof, includes:an hydraulic joint (3) linked to the rotary (2);at least a winch (4) linked to the hydraulic joint (3) and provided with at least a wire rope (18);a carrier canister (5) slidely connected with the stem (7) between the rotary (2) and the tool (6) by means of at least the wire rope (18);at least a winch (4), a wire rope (18), a carrier canister (5) are rotated together with the stem (7) of the rotary (2) in correspondence of an operating condition of the drill.