DEVICE FOR LASER-MECHANICAL DRILLING OF SILICA-CONTAINING MATERIALS Russian patent published in 2014 - IPC E21B7/14 E21C37/18 

FIELD: construction.

SUBSTANCE: device comprises an electric motor, a reduction gear with a hollow shaft, a laser light source, a tool for drilling, a mechanism of reciprocating supply of the drilling tool, an optical fibre, a gas system, a fluid reservoir, a mixer, a liquid injection system into the mixer, a suction system, channels for cooling the optical fibre, for supplying a refrigerant into a digging face zone and for discharging the refrigerant and the sludge suctioned from the digging face zone. A gas flow is supplied to the mixer from the gas system for atomisation of fluid in it with formation of a gas-droplet mixture, supplied into the digging face zone. The drilling tool is made of a sequence of units in the form of core tubes. The final unit of the drilling tool includes a ribbed crown equipped with heat-resistant cutters at its end and side surfaces. The slave end of the initial unit of the drilling tool is connected to the hollow shaft of a cylindrical reduction gear connected to an electric motor. The tube inside which the optical fibre made of quartz is placed with a gap, is positioned coaxially and without a possibility of rotation inside the cavity of the cylindrical reduction gear and the core units. The annular gap between the fibre surface and the inner surface of the tube serves as a supply channel of the gas guard flow for cooling the optical fibre and protecting its radiative end against particles of a destructible material during laser and mechanical treatment of the digging face surface. The annular gap between the outer surface of the tube and the inner surface of the core units serves as a channel for supplying the refrigerant into the digging face zone. The annular gap between the outer surface of core units and the hole surface in the material serves as a discharge channel of the refrigerant and sludge suctioned from the digging face zone.

EFFECT: improvement of production capacity for drilling holes.

2 cl, 5 dwg