WELL DRILLING METHOD AND DEVICE Russian patent published in 2008 - IPC E21B7/14 E21C37/16 

FIELD: mining, particularly well drilling by use of heat, for example, flame drilling.

SUBSTANCE: method involves supplying oxyhydrogen mixture in drilling assembly; igniting the mixture to obtain high temperature. Oxygen and hydrogen contained in oxyhydrogen mixture are obtained by water electrolysis in movable plant arranged just near well and are delivered via flexible hoses. Drilling assembly is heated by oxyhydrogen mixture blasting inside drilling device body with predetermined frequency to create high-temperature and impact wave acting on rock-cutting tool by rock-cutting tool screwing in rock. Well drilling device comprises shell body with blasting chamber, working reagent delivery channel system and exhaust gas discharge channel system. Drilling assembly is made as cylinder of molybdenum or wolfram including tank and lid connected with each by means of screw connections. Longitudinal water jacket channels are arranged inside cylinder walls. Movable rotor blades fixedly secured to hollow shaft are arranged inside the cylinder to divide cylinder volume into several chambers. Supply chamber of drilling assembly is communicated with electrolyzer chamber through gas conduits, accumulator vessels, vacuum cylinders and vacuum pumps. Reed switch and spark-plugs connected with each other through electrical chain to provide detonating gas blasting inside chamber are built in inner cylinder side.

EFFECT: improved capacity and operational efficiency.

2 cl, 15 dwg