FIELD: oil and gas industry.
SUBSTANCE: device for drilling non-circular section wells includes the housing of machine with drive devices, rotary mechanism connected to reduction gear including three shafts connected to each other, rock cutting elements; at that, side rock cutting elements are located above central one and differ by the fact that the reduction gear housing is connected to the drilling structure, reduction gear has the stops in upper part, and the shafts of reduction gear, which are located in lower part, are connected to rock cutting elements the distance between axes of which is 0.7 from diametre of side rock cutting element; at that, housing of reduction gear is connected on the side of side rock cutting elements to flexible hoses the opposite ends of which are arranged on the drum connected to dust suction device arranged at the well head.
EFFECT: drilling of non-circular blast holes per one opening without necessity for additional drilling of rock partitions, and effective cleaning of bottom hole from cut products.
4 dwg
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