METHOD FOR SINKING VERTICAL WELL BORES AND CORRESPONDING EQUIPMENT Russian patent published in 2017 - IPC E21D1/08 

FIELD: mining.

SUBSTANCE: system for sinking vertical well bores includes a rotary drive mounted on a multi-tiered sinking platform with telescopic hydraulic cylinders, and connected to a cylindrical drill, hydraulic penetration bids, a loading machine for excavation of rock, and a tubbing erector. The set of equipment includes a conductor, with friction type bearings along the perimeter, and lower and upper supporting rings, and a screwdown structure with stulls and an encasing. A cylindrical drill has a cutting edge along the lower end and a support ring in the middle section, with the tooth wheel on top; wherein the gear drives are mounted on the lower conductor support ring to engage with the gear. The loader is mounted on a telescopic vertical stand rigidly fixed to the upper central part of the conductor. Cylinder rods of hydraulic jacks of the rock drill are mounted on the upper support ring of the conductor and rods of telescopic hydraulic jacks are connected with the screw down structure. The top floor of the sinking platform has niches with inflatable rubber elements, to prevent leakage of concrete.

EFFECT: increased speed of shaft sinking and lining quality due to construction of a monolithic lining inside the barrel.

3 dwg