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

FIELD: mining, particularly well drilling methods and devices, namely drilling by use of heat, flame drilling.

SUBSTANCE: method involves obtaining hydrogen and oxygen by water electrolysis; supplying hydrogen and oxygen in combustion chamber with the use of compressor and converting combustion heat into working body heat to melt rock; inflaming and blasting detonating gas to create blast wave and to convert blast product energy into mechanical energy to rotate blades of rotor arranged in combustion chamber and connected with drilling screw installed outside of combustible chamber. Exhausted blast products are delivered to face to improve melted rock mass removal from well bottom to ground surface by means of electric pump. Device comprises derrick, drill pipes, power drive, tripping equipment, pump and drilling assembly. Supply chamber of drilling assembly is connected with electrolyzer vessel through oxygen and hydrogen supply pipelines. Drilling assembly is shaped as wolfram or molybdenum cylindrical vessel with molded air-tight end closures threadedly connected with the vessel. Longitudinal water cooling jacket channels are formed inside cylinder walls. Inserted in the vessel is rotor having blades, which separate vessel into four chambers. Reed switch is connected to inner vessel surface to provide automatic detonating mixture inflaming to blast content of one vessel chamber. Electrolyzer comprises accumulation vessel, vacuum cylinders with vacuum control means and vacuum pumps.

EFFECT: increased productivity and drilling efficiency, as well as extended technological capabilities.

2 cl, 32 dwg