Patent ID: 6655474
Filing Date: 2003-12-02
Classification: E21B

Abstract:
A drill for drilling wide diameter deep holes in soil comprising a base having a rotary equipped with a clamp, and having translation cylinders, the rotary rotates and the translation cylinders axially move a series of drill stems having a tool at a free end thereof, said drill having a hydraulic joint linked to the rotary, a carrier canister sidably connected to the drill stems, at least one winch linked to the hydraulic joint for rotation with the drill stems, the winch having at least one wire rope for slidably moving the carrier canister within the drill stems, the at least one wire rope, the tool and the winch being connected to the drill stems which have at least one longitudinally projecting guide having a lower free end located distally from the tool, the canister having an axial inner sleeve having at least one internal groove into which the at least one guide slides in correspondence to an axial movement of the canister within the stems, the at least one groove having a transversal shoulder as a stop for receiving a lower end of the at least one guide for hooking the canister to the series of stems, the canister having an inner piston linked to the at least one wire rope to ease the loading of material into the canister.