UTILISING WELL Russian patent published in 2015 - IPC E21B43/295 

FIELD: mining.

SUBSTANCE: utilising well includes a combustible gas outlet pipe and a heat exchanger arranged in annular space, with a possibility of heat pickup of waste gases, having a possibility of water supply from its source to the lower part of the heat exchanger. The heat exchanger includes two coiled pipelines wound about a combustible gas outlet pipe, the first one of which is made in its upper section preferably adjacent to the surface, and the second one is made below the first one. With that, the receiving opening of the first coiled pipeline is arranged on ground surface and interconnected with a water source, and its outlet opening arranged on its lower end is interconnected via a connecting pipeline to the receiving opening of the second coiled pipeline, which is arranged at its lower point, preferably at the lower end face of an annulus section. Besides, the outlet opening of the second coiled pipeline, which is arranged at its upper point, is interconnected via a steam line with a user of overheated steam, which is located on ground surface. A steam turbine with counter pressure is used as an overheated steam user. Besides, coiled pipelines are arranged in contact with a combustible gas outlet pipe.

EFFECT: improving waste gas heat utilisation efficiency.

2 cl, 1 tbl, 1 dwg